American Tower Corporation (AMT, NYSE)
Industry: REIT - Specialty
Annual report, fiscal year 2020







## Corporate Profile

Founded in 1995, American Tower is one of the largest global real estate investment trusts (REITs) and a leading independent owner, operator and developer of multitenant communications real estate. Our primary business is the leasing of space on communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. In addition, we offer tower-related services in the United States, including site acquisition, zoning and permitting and structural analysis, which primarily support our site leasing business, including the addition of new tenants and equipment on our sites.

Our portfolio consists of towers we own and towers we operate pursuant to long-term lease arrangements, as well as Distributed Antenna System (DAS) networks, which provide seamless coverage solutions in certain in-building and outdoor wireless environments. In addition to the communications sites in our portfolio, we manage rooftop and tower sites for property owners under various contractual arrangements. We also hold other telecommunications infrastructure, fiber and property interests that we lease primarily to communications service providers and third-party tower operators. Our communications real estate portfolio of approximately 186,000 communications sites includes more than 43,000 in the United States and Canada, nearly 76,000 in Asia-Pacific, approximately 20,000 in Africa, more than 5,300 in Europe and nearly 42,000 in Latin America.



## Supporting connectivity
worldwide






## To Our Stakeholders,

2020 proved to be an extraordinary year on many fronts, with the COVID-19 pandemic fundamentally altering the lives of our employees and those in surrounding communities, while presenting tremendous challenges on a global basis. Our hearts go out to everyone impacted by this crisis, and as it was throughout 2020, our first priority remains the health and safety of our employees and their families.

2020 was also a year during which access to mobile broadband connectivity was more critical than ever before, and I am proud to say that we at American Tower played a key role in delivering that connectivity to billions of people across our served markets as we focused on our vision of “making wireless communication possible everywhere.”





Our exceptional team, which I am privileged to lead, is a diverse, talented group of people that has been fully committed to delivering unmatched service to our tenants for many years. In 2020 specifically, our employees went above and beyond to preserve and enhance those service levels, and I want to recognize and thank them for their efforts and dedication, particularly under such challenging circumstances.

As a result of these efforts, as well as the continued execution of our Stand and Deliver strategy, we drove another strong year of financial results. Our consolidated property revenue grew by 6.5%, Adjusted EBITDA \( ^{1} \)  grew by nearly 9% and Consolidated AFFO per Share \( ^{1} \)  growth was 7.5% for the year. We also signed the longest comprehensive master lease agreement in our history with T-Mobile in the U.S., constructed a record of nearly 5,900 new towers across our global footprint, and added approximately 3,500 more sites through acquisitions, primarily in the U.S.



Moreover, we maintained our leading balance sheet by reducing our weighted average cost of borrowing to approximately 2.7% and extending our weighted average remaining tenor of debt to approximately 7 years. We were also able to lay the groundwork for the Telxius Towers transaction announced in January 2021, which we expect to be transformational for our European business.

We believe our ability to drive strong, consistent results in 2020 is not only a clear reflection of the resilience of our business model and ability to execute our strategic plan, but also an indication of our assets' mission-critical status in the context of today's ever-more interconnected world. Our communications sites continue to serve as the backbone of modern wireless networks worldwide.

## New Towers

We constructed nearly 5,900 new towers across our global footprint in 2020, a new American Tower record







## Stand and Deliver

We stand ready to deliver on the promise of mobile broadband connectivity for all






22 Countries
~ 5,600 Global Employees
~ 186,000 Total Communications Sites



## Looking Forward

Looking forward, we believe we are well-positioned to generate continued growth and attractive total returns. Our diverse portfolio of approximately 186,000 sites is located in premier locations across what we believe to be the most attractive markets throughout the world. As the pandemic has highlighted, ubiquitous access to mobile connectivity is absolutely vital, and we anticipate that the secular tailwinds in wireless that have supported our growth in the past will continue unabated in the future.

In developing markets like Brazil and Nigeria, 4G deployments are still in early stages, and significant incremental network densification will be required, positioning us well to drive colocation and amendment revenue. In more technologically advanced markets like the U.S. and Germany, 5G deployments are now under way, opening the door for strong new leasing growth on our extensive existing asset base.

In addition, as the total addressable market for wireless-linked services and solutions expands in tandem with continuing advances in technology, so too will the global opportunity set for communications infrastructure. In anticipation of that, we have been diligently working on numerous ways to extend our shared real estate platform, which we believe can further accentuate our future growth trajectory.




Chief among them is edge computing, which is likely to become a critical component of 5G networks as low latency becomes increasingly important over time. We expect our communications sites, which typically have existing access to backhaul, power and other key requirements for edge computing, to be well positioned to play a meaningful role in its efficient and cost-effective deployment—not only in the U.S., but also abroad. To that end, we have several ongoing edge compute trials and anticipate additional progress over the next several years.

As we innovate and seek to drive strong growth in property revenue, Adjusted EBITDA \( ^{1} $  and AFFO per Share \( ^{1} \) , we remain firmly committed to being a responsible corporate citizen. We expect to augment our charitable giving initiatives, grow our Digital Communities program in a number of markets and expand our efforts to reduce our environmental footprint and greenhouse gas emissions. As you will see in our fourth annual Sustainability Report later this year, we are making significant strides on the climate front, particularly with respect to more efficient energy usage and renewable energy solutions.

From a human capital perspective, we are focused on promoting diversity, inclusion and equal opportunity at all levels within our organization. This includes continued initiatives around board refreshment and diversity, a comprehensive suite of employee training resources, including conscious inclusiveness training, a firm commitment to promoting pay equality, ensuring our recruiting efforts build diverse candidate pipelines and numerous other focus areas. We have also recently appointed a Chief Diversity, Equity and Inclusion Officer who will partner with me to spearhead these initiatives and more.

In addition, I have commissioned a CEO Advisory Council, comprised of a diverse group of our employees, to help us further enhance inclusion throughout our business. Finally, we have pledged $1 million through the American Tower Foundation to help counter systemic racism in the U.S. and have recently created a Social Justice Committee within the Foundation to help appropriate these funds to deserving organizations.



As we continue to grow our business, we expect these and other similar initiatives to be critical to our continued success. The advancement and empowerment of our employees and our surrounding communities will remain front and center for me and the entire executive team.

## Equal Opportunity

We are focused on promoting diversity, inclusion and equal opportunity at all levels within our organization







## In Closing

American Tower is positioned to lead. Our strong, resilient business model, deeply experienced board, executive management team and approximately 5,600 dedicated employees throughout the world stand ready to deliver on the promise of mobile broadband connectivity for all. We are deeply appreciative of the long-term support of our many stakeholders and remain focused on continuing to drive attractive total returns in the business while making a positive difference in the world around us.



Thomas A. Bartlett

President & Chief Executive Officer



# UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

(Mark One):

☒ Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.

For the fiscal year ended December 31, 2020

□ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.

For the transition period from to

Commission File Number: 001-14195

## American Tower Corporation

(Exact name of registrant as specified in its charter)

Delaware

(State or other jurisdiction of Incorporation or Organization)

65-0723837

(I.R.S. Employer Identification No.)

116 Huntington Avenue

Boston, Massachusetts 02116

(Address of principal executive offices)

Telephone Number (617) 375-7500

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

<table><tr><td>Title of each Class</td><td>Trading Symbol(s)</td><td>Name of exchange on which registered</td></tr><tr><td>Common Stock, $0.01 par value</td><td>AMT</td><td>New York Stock Exchange</td></tr><tr><td>1.375% Senior Notes due 2025</td><td>AMT 25A</td><td>New York Stock Exchange</td></tr><tr><td>1.950% Senior Notes due 2026</td><td>AMT 26B</td><td>New York Stock Exchange</td></tr><tr><td>0.500% Senior Notes due 2028</td><td>AMT 28A</td><td>New York Stock Exchange</td></tr><tr><td>1.000% Senior Notes due 2032</td><td>AMT 32</td><td>New York Stock Exchange</td></tr></table>

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well known seasoned issuer, as defined in Rule 405 of the Securities Act: Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act: Yes ☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days: Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check One):

Large accelerated filer

☒

Accelerated filer

Non-accelerated filer

□

Smaller reporting company

Emerging growth company

□

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. □

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act ( \( §15 \)  U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act): Yes ☐ No ☒

The aggregate market value of the voting and non-voting common stock held by non-affiliates of the registrant as of June 30, 2020 was $114.3 billion, based on the closing price of the registrant's common stock as reported on the New York Stock Exchange as of the last business day of the registrant's most recently completed second quarter.

As of February 18, 2021, there were 444,384,437 shares of common stock outstanding.

## DOCUMENTS INCORPORATED BY REFERENCE

Portions of the definitive proxy statement (the "Definitive Proxy Statement") to be filed with the Securities and Exchange Commission relative to the registrant's 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Report.



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## AMERICAN TOWER CORPORATION
TABLE OF CONTENTS
FORM 10-K ANNUAL REPORT
FISCAL YEAR ENDED DECEMBER 31, 2020

Special Note Regarding Forward-Looking Statements
PART I
ITEM 1. Business
Overview
Products and Services
Strategy
Regulatory Matters
Competition
Human Capital Resources
Executive Officers
Available Information
ITEM 1A. Risk Factors
ITEM 1B. Unresolved Staff Comments
ITEM 2. Properties
ITEM 3. Legal Proceedings
ITEM 4. Mine Safety Disclosures
PART II
ITEM 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
Dividends
Performance Graph
ITEM 6. Selected Financial Data
ITEM 7. Management's Discussion and Analysis of Financial Condition and Results of Operations
Executive Overview
Non-GAAP Financial Measures
Results of Operations: Years Ended December 31, 2020 and 2019
Liquidity and Capital Resources
Critical Accounting Policies and Estimates
Accounting Standards Updates
ITEM 7A. Quantitative and Qualitative Disclosures About Market Risk
ITEM 8. Financial Statements and Supplementary Data
ITEM 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure



# AMERICAN TOWER CORPORATION
TABLE OF CONTENTS—(Continued)
FORM 10-K ANNUAL REPORT
FISCAL YEAR ENDED DECEMBER 31, 2020

<table><tr><td></td><td>Page</td></tr><tr><td>ITEM 9A. Controls and Procedures</td><td>52</td></tr><tr><td>Disclosure Controls and Procedures</td><td>52</td></tr><tr><td>Management&#x27;s Annual Report on Internal Control over Financial Reporting</td><td>53</td></tr><tr><td>Changes in Internal Control over Financial Reporting</td><td>53</td></tr><tr><td>Report of Independent Registered Public Accounting Firm</td><td>54</td></tr><tr><td>PART III</td><td></td></tr><tr><td>ITEM 10. Directors, Executive Officers and Corporate Governance</td><td>55</td></tr><tr><td>ITEM 11. Executive Compensation</td><td>56</td></tr><tr><td>ITEM 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters</td><td>56</td></tr><tr><td>ITEM 13. Certain Relationships and Related Transactions, and Director Independence</td><td>57</td></tr><tr><td>ITEM 14. Principal Accounting Fees and Services</td><td>57</td></tr><tr><td>PART IV</td><td></td></tr><tr><td>ITEM 15. Exhibits, Financial Statement Schedules</td><td>58</td></tr><tr><td>Index to Exhibits</td><td>58</td></tr><tr><td>ITEM 16. Form 10-K Summary</td><td>66</td></tr><tr><td>Signatures</td><td>67</td></tr><tr><td>Index to Consolidated Financial Statements</td><td>F-1</td></tr></table>

## SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K (this “Annual Report”) contains statements about future events and expectations, or forward-looking statements, all of which are inherently uncertain. We have based those forward-looking statements on our current expectations and projections about future results. When we use words such as “anticipates,” “intends,” “plans,” “believes,” “estimates,” “expects” or similar expressions, we are making forward-looking statements. Examples of forward-looking statements include, but are not limited to, our expectations regarding the impacts of the coronavirus (“COVID-19”) pandemic and actions in response to the COVID-19 pandemic on our business and our operating results, statements we make regarding the Pending Telxius Acquisition (as defined in this Annual Report), future prospects of growth in the communications site leasing industry, the effects of consolidation among companies in our industry and among our tenants and other competitive and financial pressures, changes in zoning, tax and other laws and regulations and administrative and judicial decisions, economic, political and other events, particularly those relating to our international operations, our future capital expenditure levels, our ability to maintain or increase our market share, our plans to fund our future liquidity needs, our substantial leverage and debt service obligations, our future financing transactions, our future operating results, the level of future expenditures by companies in this industry and other trends in this industry, the impact of technology changes on our industry and our business, our ability to remain qualified for taxation as a real estate investment trust (REIT), the amount and timing of any future distributions including those we are required to make as a REIT, natural disasters and similar events and our ability to protect our rights to the land under our towers. These statements are based on our management’s beliefs and assumptions, which in turn are based on currently available information. These assumptions could prove inaccurate. These forward-looking statements may be found under the captions “Business” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” as well as in this Annual Report generally.

You should keep in mind that any forward-looking statement we make in this Annual Report or elsewhere speaks only as of the date on which we make it. New risks and uncertainties arise from time to time, and it is impossible for us to predict these events or how they may affect us. In any event, these and other important factors, including those set forth in Item 1A of this Annual Report under the caption “Risk Factors,” may cause actual results to differ materially from those indicated by our forward-looking statements. We have no duty, and do not intend, to update or revise the forward-looking statements we make in this Annual Report, except as may be required by law. In light of these risks and uncertainties, you should keep in mind that the future events or circumstances described in any forward-looking statement we make in this Annual Report or elsewhere might



not occur. References in this Annual Report to “we,” “our” and the “Company” refer to American Tower Corporation and its predecessor, as applicable, individually and collectively with its subsidiaries as the context requires.



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# PART I

## ITEM 1. BUSINESS

## Overview

We are one of the largest global real estate investment trusts and a leading independent owner, operator and developer of multitenant communications real estate. Our primary business is the leasing of space on communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. We refer to this business as our property operations, which accounted for 99% of our total revenues for the year ended December 31, 2020. We also offer tower-related services in the United States, which we refer to as our services operations. These services include site application, zoning and permitting and structural analysis, which primarily support our site leasing business, including the addition of new tenants and equipment on our sites.

Since inception, we have grown our communications real estate portfolio through acquisitions, long-term lease arrangements and site development. Our portfolio primarily consists of towers that we own and towers that we operate pursuant to long-term lease arrangements, as well as distributed antenna system (“DAS”) networks, which provide seamless coverage solutions in certain in-building and outdoor wireless environments. In addition to the communications sites in our portfolio, we manage rooftop and tower sites for property owners under various contractual arrangements. We also hold other telecommunications infrastructure, fiber and property interests that we lease primarily to communications service providers and third-party tower operators.

In 2020, we added approximately 3,000 communications sites to our portfolio, primarily in the United States, and launched operations in Canada and Australia as part of our acquisition of InSite Wireless Group, LLC (“InSite,” and the acquisition, the “InSite Acquisition”). We also launched operations in Poland through an agreement to acquire communications sites from Electronic Control Systems Spółka Akcyjna, added 530 communications sites to our portfolio in Latin America through our agreement with Entel PCS Telecommunications S.A. and Entel Peru S.A. (the “Entel Acquisition”) and added 564 communications sites to our portfolio in Europe through our agreements with Orange S.A. (the “Orange Acquisition”). As of December 31, 2020, our communications real estate portfolio of 185,641 communications sites included 43,146 communications sites in the U.S. & Canada, 75,772 communications sites in Asia-Pacific, 19,863 communications sites in Africa, 5,331 communications sites in Europe and 41,529 communications sites in Latin America, as well as urban telecommunications assets in Argentina, Brazil, Colombia, India, Mexico and South Africa and other property interests in the United States and Australia.

On January 13, 2021, we entered into two agreements with Telxius Telecom, S.A. (“Telxius”), a subsidiary of Telefónica, S.A., pursuant to which we expect to acquire Telxius’ European and Latin American tower divisions, comprising approximately 31,000 communications sites in Argentina, Brazil, Chile, Germany, Peru and Spain, for approximately 7.7 billion Euros (“EUR”) (approximately $9.4 billion at the date of signing) (the “Pending Telxius Acquisition”), subject to limited adjustments. The Pending Telxius Acquisition is expected to close in tranches beginning in the second quarter of 2021, subject to customary closing conditions, including government and regulatory approval.

We operate as a real estate investment trust for U.S. federal income tax purposes (“REIT”). Accordingly, we generally are not required to pay U.S. federal income taxes on income generated by our REIT operations, including the income derived from leasing space on our towers, as we receive a dividends paid deduction for distributions to stockholders that generally offsets our REIT income and gains. However, we remain obligated to pay U.S. federal income taxes on earnings from our domestic taxable REIT subsidiaries (“TRSs”). In addition, our international assets and operations, regardless of their classification for U.S. tax purposes, continue to be subject to taxation in the jurisdictions where those assets are held or those operations are conducted.

The use of TRSs enables us to continue to engage in certain businesses and jurisdictions while complying with REIT qualification requirements. We may, from time to time, change the election of previously designated TRSs to be included as part of the REIT. As of December 31, 2020, our REIT-qualified businesses included our U.S. tower leasing business and a majority of our U.S. indoor DAS networks business and services segment, as well as most of our operations in Mexico, Germany, Costa Rica, Nigeria, France, Canada and Australia.

During the fourth quarter of 2020, as a result of the InSite Acquisition, we updated our reportable segments to rename U.S. property and Asia property to U.S. & Canada property and Asia-Pacific property, respectively. We continue to report our results in six segments – U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property and services. This change was made to better align the names of our reportable segments with the geographical areas of our business operations following the InSite Acquisition. The change of our reportable segments names is solely reflective of the inclusion of Canada and Australia in our business operations, as a result of the InSite Acquisition, and had no impact on our consolidated financial statements for any prior periods.



## Products and Services

## Property Operations

Our property operations accounted for 99%, 98% and 98% of our total revenues for the years ended December 31, 2020, 2019 and 2018, respectively. Our revenue is primarily generated from tenant leases. Our tenants lease space on our communications real estate, where they install and maintain their equipment. Rental payments vary considerably depending upon numerous factors, including, but not limited to, amount, type and position of tenant equipment on the tower, remaining tower capacity and tower location. Our costs typically include ground rent (which is primarily fixed under long-term lease agreements with annual cost escalations) and power and fuel costs, some or all of which may be passed through to our tenants, as well as property taxes and repair and maintenance expenses. Our property operations have generated consistent growth in revenue and typically have low cash flow volatility due to the following characteristics:

- Long-term tenant leases with contractual rent escalations. In general, our tenant leases with wireless carriers have initial non-cancellable terms of five to ten years with multiple renewal terms, with provisions that periodically increase the rent due under the lease, typically annually, based on a fixed escalation percentage (averaging approximately 3% in the United States) or an inflationary index in most of our international markets, or a combination of both. Based upon foreign currency exchange rates and the tenant leases in place as of December 31, 2020, we expect to generate nearly $59 billion of non-cancellable tenant lease revenue over future periods, before the impact of straight-line lease accounting.

- Consistent demand for our sites. As a result of rapidly growing usage of mobile data and other wireless services and the corresponding wireless industry capital spending trends in the markets we serve, we anticipate consistent demand for our communications sites. We believe that our global asset base positions us well to benefit from the increasing proliferation of advanced wireless devices and the increasing usage of high bandwidth applications on those devices. We have the ability to add new tenants and new equipment for existing tenants on our sites, which typically results in incremental revenue and modest incremental costs. Our site portfolio and our established tenant base provide us with a solid platform for new business opportunities, which has historically resulted in consistent and predictable organic revenue growth.

- High lease renewal rates. Our tenants tend to renew leases because suitable alternative sites may not exist or be available and repositioning a site in their network may be expensive and may adversely affect network quality. Historically, churn has averaged approximately 1% to 2% of tenant billings per year. We define churn as tenant billings lost when a tenant cancels or does not renew its lease or, in limited circumstances, when the lease rates on existing leases are reduced. We derive our churn rate for a given year by dividing our tenant billings lost on this basis by our prior-year tenant billings. As discussed in Item 7 of this Annual Report under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Executive Overview,” we experienced elevated levels of churn in recent years due to carrier consolidation-driven churn in India. We anticipate that our churn rate in our Asia-Pacific property segment will moderate over time, however, in the immediate term, we believe that our churn rate may remain elevated, primarily due to the recent court rulings by the Indian Supreme Court, as set forth in Item 1A of this Annual Report under the caption “Risk Factors—Our business, and that of our tenants, is subject to laws, regulations and administrative and judicial decisions, and changes thereto, that could restrict our ability to operate our business as we currently do or impact our competitive landscape.” Additionally, we expect that our churn rate in our U.S. & Canada property segment will be elevated for a period of several years due to contractual lease cancellations and non-renewals pursuant to the terms of our master lease agreement with T-Mobile US, Inc. (“T-Mobile,” and the agreement, the “T-Mobile MLA”) entered into in September 2020.

- High operating margins. Incremental operating costs associated with adding new tenants or equipment to an existing communications site are relatively minimal. Therefore, as tenants or equipment are added, the substantial majority of incremental revenue flows through to gross margin and operating profit. In addition, in many of our international markets certain expenses, such as ground rent or power and fuel costs, are reimbursed or shared by our tenant base.

- Low maintenance capital expenditures. On average, we require relatively low amounts of annual capital expenditures to maintain our communications sites.

Our property business includes the operation of communications sites and managed networks, the leasing of property interests, and, in select markets, the operation of fiber and the provision of backup power through shared generators. Our presence in a number of markets at different relative stages of wireless development provides us with significant diversification and long-term growth potential. Our property segments accounted for the following percentage of consolidated total revenue for the years



ended December 31,:

<table><tr><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>U.S. &amp; Canada</td><td>56 %</td><td>55 %</td><td>51 %</td></tr><tr><td>Asia-Pacific</td><td>14 %</td><td>16 %</td><td>21 %</td></tr><tr><td>Africa</td><td>11 %</td><td>8 %</td><td>7 %</td></tr><tr><td>Europe</td><td>2 %</td><td>2 %</td><td>2 %</td></tr><tr><td>Latin America</td><td>16 %</td><td>18 %</td><td>17 %</td></tr></table>

Communications Sites. Approximately 95%, 95% and 96% of revenue in our property segments was attributable to our communications sites, excluding DAS networks, for the years ended December 31, 2020, 2019 and 2018, respectively.

We lease space on our communications sites to tenants providing a diverse range of communications services, including cellular voice and data, broadcasting, mobile video and a number of other applications. In addition, in many of our international markets, we receive pass-through revenue from our tenants to cover certain costs, including power and fuel costs and ground rent. Our top tenants by revenue for each property segment are as follows for the year ended December 31, 2020:

- U.S. & Canada: AT&T Inc. (“AT&T”); T-Mobile; and Verizon Wireless accounted for an aggregate of 89% of U.S. & Canada property segment revenue.

- Asia-Pacific: Vodafone Idea Limited; Bharti Airtel Limited (“Airtel”); and Reliance Jio accounted for an aggregate of 87% of Asia-Pacific property segment revenue.

- Africa: Airtel; and MTN Group Limited (“MTN”) accounted for an aggregate of 68% of Africa property segment revenue.

- Europe: Telefónica S.A. (“Telefónica”); Bouygues; and Free accounted for an aggregate of 69% of Europe property segment revenue.

- Latin America: AT&T; Telefónica; and América Móvil accounted for an aggregate of 56% of Latin America property segment revenue.

Accordingly, we are subject to certain risks, as set forth in Item 1A of this Annual Report under the caption “Risk Factors—A substantial portion of our revenue is derived from a small number of tenants, and we are sensitive to changes in the creditworthiness and financial strength of our tenants.” In addition, we are subject to risks related to our international operations, as set forth under the caption “Risk Factors—Our foreign operations are subject to economic, political and other risks that could materially and adversely affect our revenues or financial position, including risks associated with fluctuations in foreign currency exchange rates.”

Managed Networks, Fiber and Related Assets, Property Interests and Shared Generators. In addition to our communications sites, we also own and operate several types of managed network solutions, provide communications site management services to third parties, manage and lease property interests under carrier or other third-party communications sites, provide the right to use fiber and provide back-up power sources to tenants at our sites. The balance of our property segment revenue not attributable to our communications sites was attributable to these items.

- Managed Networks. We own and operate DAS networks in the United States and certain international markets. We obtain rights from property owners to install and operate in-building DAS networks, and we grant rights to wireless service providers to attach their equipment to our installations. We also offer a small portfolio of outdoor DAS networks as a complementary shared infrastructure solution for our tenants in the United States and in certain international markets. Typically, we have designed, built and operated our outdoor DAS networks in areas in which zoning restrictions or other barriers may prevent or delay deployment of more traditional wireless communications sites, such as macro tower sites. We also hold lease rights and easement interests on rooftops capable of hosting communications equipment in locations where towers are generally not a viable solution based on area characteristics. In addition, we provide management services to property owners in the United States who elect to retain full rights to their property while simultaneously marketing the rooftop for wireless communications equipment installation. As the demand for advanced wireless services in urban markets evolves, we continue to evaluate a variety of infrastructure solutions, including small cells and other network architectures that may support our tenants' networks in these areas.

- Fiber and Related Assets. We own and operate fiber and related assets in the United States and certain international markets. We currently provide the right to use such fiber and related assets to communications and internet service providers and third-party operators to support their telecommunications infrastructure. We expect to continue to evaluate opportunities to invest selectively in and expand these and other similar assets in the future as part of advanced network deployments.



- Property Interests. We own portfolios of property interests in Australia, Canada and the United States, including land under carrier or other third-party communications sites, which provide recurring cash flow under complementary leasing arrangements.

- Shared Generators. We have contracts with certain of our tenants in the United States pursuant to which we provide access to shared backup power generators.

## Services Operations

We offer tower-related services in the United States, including site application, zoning and permitting and structural analysis services. Our services operations primarily support our site leasing business, including through the addition of new tenants and equipment on our sites. This segment accounted for 1%, 2% and 2% of our total revenue for the years ended December 31, 2020, 2019 and 2018, respectively.

Site Application, Zoning and Permitting. We engage in site application services on our own behalf in connection with our tower development projects, as well as on behalf of our tenants. We typically work with our tenants' engineers to determine the geographic areas where new communications sites will best address the tenants' needs and meet their coverage objectives. Once a new site is identified, we acquire the rights to the land or structure on which the site will be constructed, and we manage the permitting process to ensure all necessary approvals are obtained to construct and operate the communications site.

Structural Analysis. We offer structural analysis services to wireless carriers in connection with the installation of their communications equipment on our towers. Our team of engineers can evaluate whether a tower structure can support the additional burden of the new equipment or if an upgrade is needed, which enables our tenants to better assess potential sites before making an installation decision. Our structural analysis capabilities enable us to provide higher quality service to our existing tenants by, among other things, reducing the time required to achieve on-air readiness, while also providing opportunities to offer structural analysis services to third parties.

## Strategy

## Operational Strategy

As the use of wireless services on handsets, tablets and other advanced mobile devices grows and evolves, there is a corresponding increase in demand for the communications infrastructure required to deploy current and future generations of wireless communications technologies. To capture this demand, our primary operational focus is to (i) increase the occupancy of our existing communications real estate portfolio to support global connectivity, (ii) invest in and selectively grow our communications real estate portfolio, (iii) further improve our operational performance and efficiency, including through platform expansion initiatives, and (iv) maintain a strong balance sheet. We believe these efforts to meet our tenants' needs will support and enhance our ability to capitalize on the growth in demand for wireless infrastructure. In addition, we expect to explore new opportunities to enhance or extend our shared communications infrastructure businesses, including those that may make our assets incrementally more attractive to new tenants, or to existing tenants for new uses, and those that increase our operational efficiency.

- Increase the occupancy of our existing communications real estate portfolio to support global connectivity. We believe that our highest incremental returns will be achieved by leasing additional space on our existing communications sites. Increasing demand for wireless services in our served markets has resulted in significant capital spending by major wireless carriers and other connectivity providers. As a result, we anticipate growing demand for our communications sites because they are attractively located and typically have capacity available for additional tenants and equipment. In the United States, incremental carrier network activity is being driven by 4G network densification initiatives as well as the early stages of multiple concurrent 5G network deployments. In our international markets, carriers are increasingly deploying more advanced network technologies such as 4G and, in the case of our international markets with more mature network technology, 5G, while continuing to selectively augment legacy networks. We believe that the majority of our towers have capacity for additional tenants and that substantially all of our towers that are currently at or near full structural capacity can be upgraded or augmented to meet future tenant demand with relatively modest capital investment. Therefore, we will continue to target our sales and marketing activities to increase the utilization and return on investment of our existing communications sites.

- Invest in and selectively grow our communications real estate portfolio to meet our tenants’ needs. We seek opportunities to invest in and grow our operations through our capital expenditure program, new site construction and acquisitions. We believe we can achieve attractive risk-adjusted returns by pursuing such investments. In addition, we seek to secure property interests under our communications sites to improve operating margins as we reduce our cash operating expense related to ground leases. A significant portion of our inorganic growth has been focused on properties with lower initial tenancy because we believe that over time we can significantly increase tenancy levels, and therefore, drive strong returns on those assets.



- Further improve our operational performance and efficiency. We continue to seek opportunities to improve our operational performance throughout the organization. This includes investing in our systems and people as we strive to improve efficiency and provide superior service to our tenants. To achieve this, we intend to continue to focus on customer service initiatives, such as reducing cycle times for key functions, including lease processing and tower structural analysis. We are also focused on developing and implementing renewable power solutions across our footprint to reduce our reliance on fossil fuels and help improve the overall efficiency of the communications infrastructure and wireless industries through our sustainability and platform expansion initiatives. We also expect to explore additional ways to use our platform expansion initiatives to enhance the efficiency of our operations over time.

- Maintain a strong balance sheet. We remain committed to disciplined financial policies, which we believe result in our ability to maintain a strong balance sheet and will support our overall strategy and focus on asset growth and operational excellence. As a result of these policies, we currently have investment grade credit ratings. We continue to focus on maintaining a robust liquidity position and, as of December 31, 2020, had $4.9 billion of available liquidity. We believe that our investment grade credit ratings provide us consistent access to the capital markets and our liquidity provides us the ability to continue to invest in growing and augmenting our business.

## Capital Allocation Strategy

The objective of our capital allocation strategy is to simultaneously increase adjusted funds from operations per share and our return on invested capital over the long term. To maintain our qualification for taxation as a REIT, we are required annually to distribute an amount equal to at least 90% of our REIT taxable income (determined before the deduction for distributed earnings and excluding any net capital gain) to our stockholders. After complying with our REIT distribution requirements, we plan to continue to allocate our available capital among investment alternatives that meet or exceed our return on investment criteria, while taking into account the repayment of debt consistent with our financial policies.

- Capital expenditure program. We expect to continue to invest in and expand our existing communications real estate portfolio through our capital expenditure program. This includes capital expenditures associated with site maintenance, increasing the capacity of our existing sites and projects such as new site construction, land interest acquisitions and power solutions.

- Acquisitions. We intend to pursue acquisitions of communications sites and other telecommunications infrastructure in our existing or new markets where we can meet or exceed our risk-adjusted return on investment criteria. The risk-adjusted hurdle rates used to evaluate acquisition opportunities consider additional factors such as the country and counterparties involved, investment and economic climate, legal and regulatory conditions and industry risk, among others.

- Return excess capital to stockholders. If we have excess capital available after funding (i) our required distributions, (ii) capital expenditures, (iii) the repayment of debt consistent with our financial policies and (iv) anticipated future investments, including acquisition and select innovation opportunities, we will seek to return such excess capital to stockholders, including through our stock repurchase programs.

## International Growth Strategy

We believe that, in certain international markets, we can create substantial value by either establishing a new, or expanding our existing, communications real estate leasing business. Therefore, we expect we will continue to seek international growth opportunities where we believe our risk-adjusted return objectives can be achieved. We strive to maintain a diversified approach to our international growth strategy by operating in a geographically diverse array of markets in a variety of stages of wireless network development. Our international growth strategy includes a disciplined, individualized market evaluation, in which we conduct the following analyses, among others:

- Country analysis. Prior to entering a new market, we conduct an extensive review of the country’s historical and projected macroeconomic fundamentals, including inflation and foreign currency exchange rate trends, demographics, capital markets, tax regime and investment alternatives, and the general business, political and legal environments, including property rights and regulatory regime.

- Wireless industry analysis. To confirm the presence of sufficient demand to support an independent tower leasing model, we analyze the competitiveness of the country’s wireless market. This includes an evaluation of the industry’s pricing environment, past and potential consolidation and the stage of its wireless network development. Characteristics that result in an attractive investment opportunity include (i) multiple competitive wireless service providers who are actively seeking to invest in deploying voice and data networks and (ii) ongoing or expected deployment of incremental spectrum from recent or anticipated auctions.

- Opportunity and counterparty analysis. Once an investment opportunity is identified within a geographic area with an attractive wireless industry, we conduct a multifaceted opportunity and counterparty analysis. This includes evaluating (i) the type of transaction, (ii) its ability to meet our risk-adjusted return criteria given the country and the



counterparties involved, including the anticipated anchor tenant and (iii) how the transaction fits within our long-term strategic objectives, including future potential investment and expansion within the region.

## Regulatory Matters

Towers, Antennas and Fiber. Our U.S. and international tower leasing businesses are subject to national, state and local regulatory requirements with respect to the registration, siting, construction, lighting, marking and maintenance of our towers. In the United States, the construction of new towers or modifications to existing towers may require pre-approval by the Federal Communications Commission (“FCC”) and the Federal Aviation Administration (“FAA”), depending on factors such as tower height and proximity to public airfields. Towers requiring pre-approval must be registered with the FCC and maintained in accordance with FAA standards. Similar requirements regarding pre-approval of the construction and modification of towers are imposed by regulators in other countries. Non-compliance with applicable tower-related requirements may lead to monetary penalties or site deconstruction orders.

Certain of our international operations are subject to regulatory requirements with respect to licensing, registration, permitting and public listings. In India, our subsidiary, ATC Telecom Infrastructure Private Limited (“ATC TIPL”), holds an Infrastructure Provider Category-I (“IP-I”) Registration Certificate issued by the Indian Ministry of Communications and Information Technology, which permits us to provide tower space to companies licensed as telecommunications service providers under the Indian Telegraph Act of 1885. As a condition to the IP-I, the Indian government has the right to take over telecommunications infrastructure in the case of emergency or war. Additionally, in 2018, ATC TIPL issued non-convertible debentures, which are listed on the National Stock Exchange of India. Although the debt is held by another subsidiary of ours and is eliminated in consolidation, ATC TIPL is still subject to the listing requirements of such exchange.

In Africa, our subsidiaries in Ghana, Kenya, Niger, Nigeria and Uganda are required to hold a license in order to establish and maintain passive telecommunications infrastructure services and DAS networks for communications service providers. In Burkina Faso, a new licensing regime was recently enacted which required our subsidiary there to be licensed. Additionally, in Uganda, our subsidiary is subject to review for three years commencing in 2020 by a monitoring trustee regarding compliance with certain conditions of approval of our acquisition in 2019 of Eaton Towers Holdings Limited (“Eaton Towers,” and the acquisition, the “Eaton Towers Acquisition”).

In Latin America, our subsidiaries in Chile and Argentina hold licenses for the provision of passive telecommunications infrastructure and, in Argentina, for leasing of fiber. The subsidiaries that hold our fiber business in Mexico and Brazil are also licensed and regulated as concession holders and permit holders authorized to provide telecommunications services. In many of the markets in which we operate, we are required to provide tower space to service providers on a non-discriminatory basis, subject to the negotiation of mutually agreeable terms.

Our international business operations may be subject to increased licensing fees or ownership restrictions. For example, in South Africa, the Broad-Based Black Economic Empowerment Act, 2003 (the “BBBEE Act”) has established a legislative framework for the promotion of economic empowerment of South African citizens disadvantaged by Apartheid. Accordingly, the BBBEE Act and related codes measure BBBEE Act compliance and good corporate practice by the inclusion of certain ownership, management control, employment equity and other metrics for companies that do business there. In Kenya, our regulator requires all holders of a commercial license to issue at least 30% of their shares to Kenyans within three years of receiving the license unless a waiver is obtained to extend such period of compliance by a year. In addition, certain municipalities have sought to impose permit fees based upon structural or operational requirements of towers and certain regional and other governmental bodies have sought to impose levies or other forms of fees. Our foreign operations may be affected if a country’s regulatory authority restricts, revokes or modifies spectrum licenses of certain wireless service providers or implements limitations on foreign ownership.

In all countries where we operate, we are subject to zoning restrictions and restrictive covenants imposed by local authorities or community organizations. While these regulations vary, they typically require tower owners or tenants to obtain approval from local authorities or community standards organizations prior to tower construction or the addition of a new antenna to an existing tower. Local zoning authorities and community residents often oppose construction in their communities, which can delay or prevent new tower construction, new antenna installation or site upgrade projects, thereby limiting our ability to respond to tenant demand. This opposition and existing or new zoning regulations can increase costs associated with new tower construction, tower modifications or additions of new antennas to a site or site upgrades, as well as adversely affect the associated timing or cost of such projects. Further, additional regulations may be adopted that cause delays or result in additional costs to us or changes in the competitive landscape that may negatively affect our business. These factors could materially and adversely affect our operations. In the United States, the Telecommunications Act of 1996 prohibits any action by state and local authorities that would discriminate between different providers of wireless services or ban altogether the construction, modification or placement of communications sites. It also prohibits state or local restrictions based on the environmental effects of radio frequency emissions to the extent the facilities comply with FCC regulations. Further, in



February 2012, the United States government adopted regulations requiring that local and state governments approve modifications or colocations that qualify as eligible facilities under the regulations.

Portions of our business are subject to additional regulations, for example, in a number of states throughout the United States, certain of our subsidiaries hold Competitive Local Exchange Carrier (CLEC) or other status, in connection with the operation of our outdoor DAS networks business. In addition, we, or our tenants, may be subject to new regulatory policies in certain jurisdictions from time to time that may materially and adversely affect our business or the demand for our communications sites.

Environmental Matters. Our U.S. and international operations are subject to various national, state and local environmental laws and regulations, including those relating to the management, use, storage, disposal, emission and remediation of, and exposure to, hazardous and non-hazardous substances, materials and wastes and the siting of our towers. We may be required to obtain permits, pay additional property taxes, comply with regulatory requirements and make certain informational filings related to hazardous substances or devices used to provide power such as batteries, generators and fuel at our sites. Violations of these types of regulations could subject us to fines or criminal sanctions.

Additionally, in the United States and in other countries where we operate, before constructing a new tower or adding an antenna to an existing site, we must review and evaluate the impact of the action to determine whether it may significantly affect the environment and whether we must disclose any significant impacts in an environmental assessment. If a tower or new antenna might have a material adverse impact on the environment, FCC or other governmental approval of the tower or antenna could be significantly delayed.

Health and Safety. In the United States and in other countries where we operate, we are subject to various national, state and local laws regarding employee health and safety, including protection from radio frequency exposure. Additionally, and in response to various national, state and local laws and guidance enacted in response to the ongoing COVID-19 pandemic, we implemented work-from-home arrangements and travel restrictions for our employees where practicable, as well as and other modifications to our business practices.

## Competition

Our industry is highly competitive. We compete, both for new business and for the acquisition of assets, with other public tower companies, such as Crown Castle International Corp., SBA Communications Corporation, Telesites S.A.B. de C.V. and Cellnex Telecom, S.A., wireless carrier tower consortia such as Indus Towers Limited and private tower companies, private equity sponsored firms, carrier-affiliated tower companies, independent wireless carriers, tower owners, broadcasters and owners of non-communications sites, including rooftops, utility towers, water towers and other alternative structures. We believe that site location and capacity, network density, price, quality and speed of service have been, and will continue to be, significant competitive factors affecting owners, operators and managers of communications sites.

Our services business competes with a variety of companies offering individual, or combinations of, competing services. The field of competitors includes site application consultants, zoning consultants, real estate firms, right-of-way consultants, structural engineering firms, tower owners/managers, telecommunications equipment vendors who can provide turnkey site development services through multiple subcontractors and our tenants' personnel. We believe that our tenants base their decisions for services on various criteria, including a company's experience, local reputation, price and time for completion of a project.

For more information on demand trends in our industry, see Item 7 of this Annual Report under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Executive Overview.”

## Human Capital Resources

As of December 31, 2020, we employed 5,618 full-time individuals, including 1,849 employees based in the United States and 3,769 employees based internationally. We consider our employee relations to be good. Our teams representing our 22 countries around the world are our most important assets and fundamental to our success. Aligned with our business strategy, our human capital strategy focuses on developing and delivering solutions to attract, develop, engage and retain top diverse talent in each of the countries where we operate.

Diversity, Equity and Inclusion. Diversity, equity and inclusion are top priorities for us. A critical factor in our success is ensuring that each of these remains at the core of our business culture, infusing fresh ideas, helping us remain connected to our tenants in a dynamic global market and ensuring mutual respect guides us in our interactions both internally and externally.

Half of the members of our board of directors are either female or part of a minority group. In addition, our recruiting efforts consistently include strategies to build diverse candidate pipelines and create an environment that maintains a diverse team of global employees. As part of our efforts to help employees succeed in their roles and have access to career opportunities, we



create a variety of development opportunities unique to each market. For example, in the United States, we have programs designed to enhance opportunities for our female leaders, such as Strategies for Success, the Simmons Women’s Leadership Conference and the Women’s Wireless Leadership Forum of the Wireless Infrastructure Association.

Additionally, in 2020, we implemented several new initiatives designed to address racial injustice and enhance our diversity. These include CEO-led listening sessions with employees of color, a pledge of $1.0 million from the American Tower Foundation to counter systemic racism, expanding recruiting efforts at Historically Black Colleges and Universities, increasing diversity and inclusion training for employees and managers and launching an employee-led CEO Advisory Council that will identify diversity action items and next steps for our diversity and inclusion efforts.

Talent Development. As a critical investment in our capacity to provide tenants with outstanding support and customer service, we offer development programs and on-demand opportunities to cultivate talent throughout our global organization. We have 7,000 resources in up to five languages that focus on job-specific training and general topics like productivity, collaboration and project management. We create and customize courses to meet regional needs and update these courses regularly to address changing marketplace dynamics and employee interests. We also have a comprehensive talent-management review process to develop future leaders and ensure effective succession planning. Our Latin America, Europe and Africa teams use the TalentPrint data analytics solution to enhance performance and talent management assessments, as well as data for targeted individual employee development and organizational succession planning.

Developing our managers is critical to our success, and resources and tools are provided to all levels of management. For example, the Management Development at American Tower program provides continuous development opportunities through training led by American Tower leaders. Managers learn tools and best practices that enable both management and team success, and that build and strengthen competencies to better respond to the needs of a growing and increasingly complex organization. Our annual Advanced Leadership Development Program, in collaboration with the INSEAD executive education program, provides our next generation leaders in Latin America, Europe and Africa with a twelve-week intensive workshop to enhance management and leadership skills. Additionally, the Leadership Excellence at American Tower Program supports senior leaders' development through its partnership with the Massachusetts Institute of Technology. Participants learn from leading experts on topics like global strategy and leading in uncertain times.

Workplace Safety. We are committed to the safety of our employees and surrounding communities. Depending on the role, team members are required to pass and complete regular safety training courses and follow specific tower and site safety protocols using complex operational manuals. A key component of our culture is a strong commitment to incident reporting and corrective actions, as well as a comprehensive program for ensuring vendor compliance with safety standards and certifications. Our strict adherence to the rigorous standards set forth by the relevant government agencies and other authorities, such as the Telecommunications Infrastructure Registered Apprenticeship Program and Telecommunications Industry Association, is critical to ensuring our towers are structurally safe for field personnel, vendors, tenants and communities.

Health and Wellness. As we navigate COVID-19, our top priority continues to be the health and safety of our employees, their families, our tenants, suppliers and surrounding communities. We have taken a variety of actions to ensure the continued availability of our communications sites, while also focusing on the well-being of our people. These measures include providing support for our tenants remotely, requiring work-from-home arrangements, restricting travel for our teams where practicable, safety equipment and COVID-19 training for essential employees working to maintain our sites, as well as other modifications to our business practices.

## Executive Officers

For information about our Executive Officers, see Item 10 of this Annual Report under the caption “Directors, Executive Officers and Corporate Governance.”

## Available Information

Our internet website address is www.american tower.com. Information contained on our website is not incorporated by reference into this Annual Report, and you should not consider information contained on our website as part of this Annual Report. You may access, free of charge, our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q and Current Reports on Form 8-K, plus amendments to such reports as filed or furnished pursuant to Sections 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (“Exchange Act”), through the “Investor Relations” portion of our website as soon as reasonably practicable after we electronically file such material with, or furnish it to, the Securities and Exchange Commission (the “SEC”).

We have adopted a written Code of Ethics and Business Conduct Policy (the “Code of Conduct”) that applies to all of our employees and directors, including, but not limited to, our principal executive officer, principal financial officer and principal accounting officer or controller or persons performing similar functions. The Code of Conduct is available on the “Corporate Responsibility” portion of our website and our Corporate Governance Guidelines and the charters of the audit, compensation



and nominating and corporate governance committees of our Board of Directors are available on the “Investor Relations” portion of our website. In the event we amend the Code of Conduct, or provide any waivers of the Code of Conduct to our directors or executive officers, we will disclose these events on our website as required by the regulations of the New York Stock Exchange (the “NYSE”) and applicable law.

In addition, paper copies of these documents may be obtained free of charge by writing us at the following address: 116 Huntington Avenue, Boston, Massachusetts 02116, Attention: Investor Relations; or by calling us at (617) 375-7500.

## ITEM 1A. RISK FACTORS

## Risks Related to Our Business Strategy

A significant decrease in leasing demand for our communications infrastructure would materially and adversely affect our business and operating results, and we cannot control that demand.

A significant reduction in leasing demand for our communications infrastructure would materially and adversely affect our business, results of operations or financial condition. Factors that may affect such demand include:

- increased mergers, consolidations or exits that reduce the number of wireless service providers or increased use of network sharing among governments or wireless service providers;

• the financial condition of wireless service providers, including as a result of the COVID-19 pandemic;

- zoning, environmental, health, tax or other government regulations or changes in the application and enforcement thereof;

• governmental licensing of spectrum or restriction or revocation of our tenants’ spectrum licenses;

- a decrease in consumer demand for wireless services, including due to general economic conditions, disruption in the financial and credit markets or global social, political or health crises, such as the material adverse effect of the COVID-19 pandemic on the global economy and markets;

- the ability and willingness of wireless service providers to maintain or increase capital expenditures on network infrastructure;

• delays or changes in the deployment of next generation wireless technologies; and

• technological changes.

If our tenants consolidate their operations, exit the telecommunications business or share site infrastructure to a significant degree, our growth, revenue and ability to generate positive cash flows could be materially and adversely affected.

Significant consolidation among our tenants could reduce demand for our communications infrastructure and may materially and adversely affect our growth and revenues. Certain combined companies have rationalized duplicative parts of their networks or modernized their networks, and these and other tenants could determine not to renew, or attempt to cancel, avoid or limit leases or related payments with us. In the event a tenant terminates its business or separately sells its spectrum, we may experience increased churn as a result. Our ongoing contractual revenues and our future results may be negatively impacted if a significant number of these leases are terminated or not renewed. For example, see our discussion of carrier consolidation-driven churn in our Asia-Pacific property segment and our expected churn in our U.S. & Canada property segment, as a result of the T-Mobile MLA, in Item 7 of this Annual Report, under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Executive Overview.”

In addition, extensive sharing of site infrastructure, roaming or resale arrangements among wireless service providers, including due to increases in advanced network technology such as 5G, as an alternative to leasing our communications sites, without compensation to us, may cause new lease activity to slow if carriers utilize shared equipment rather than deploy new equipment, or may result in the decommissioning of equipment on certain existing sites because portions of the tenants' networks may become redundant.

A substantial portion of our revenue is derived from a small number of tenants, and we are sensitive to adverse changes in the creditworthiness and financial strength of our tenants.

A substantial portion of our total operating revenues is derived from a small number of tenants. If any of these tenants are unwilling or unable to perform their obligations under their agreements with us, our revenues, results of operations, financial condition and liquidity could be materially and adversely affected.

One or more of our tenants, or their parent companies, may experience financial difficulties, file for bankruptcy or reduce or terminate operations as a result of a prolonged economic downturn, economic difficulties (including those from the imposition



of taxes, fees, regulations or judicial interpretations of regulations, and any associated penalties or interest, which may be substantial) or otherwise. The ongoing COVID-19 pandemic could materially and adversely affect our tenants through disruptions of, among other things, their ability to procure telecommunications equipment through their supply chains and their ability to maintain liquidity and deploy network capital, with potential decreases in consumer spending contributing to liquidity risks. Such financial difficulties could result in uncollectible accounts receivable and an impairment of our deferred rent asset, tower asset, network location intangible asset, tenant-related intangible asset or goodwill. The loss of significant tenants, or the loss of all or a portion of our anticipated lease revenues from certain tenants, could have a material adverse effect on our business, results of operations or financial condition.

Due to the long-term nature of our tenant leases, we depend on the continued financial strength of our tenants. Many wireless service providers operate with substantial levels of debt. In our international operations, many of our tenants are subsidiaries of global telecommunications companies. These subsidiaries may not have the explicit or implied financial support of their parent entities.

In addition, many of our tenants and potential tenants rely on capital raising activities to fund their operations and capital expenditures, which may be more difficult or expensive in the event of downturns in the economy or disruptions in the financial and credit markets, such as the current environment driven by the significant disruptions caused by the COVID-19 pandemic. If our tenants or potential tenants are unable to raise adequate capital to fund their business plans or face capital constraints, they may reduce their spending, file for bankruptcy or reduce or terminate operations, which could materially and adversely affect demand for our communications sites and our services business.

In the ordinary course of our business, we do occasionally experience disputes with our tenants, generally regarding the interpretation of terms in our leases. Historically, we have resolved these disputes in a manner that did not have a material adverse effect on us or our relationships with our tenants. However, it is possible that such disputes could lead to a termination of our leases with those tenants, a material adverse modification of the terms of those leases or a deterioration in our relationships with those tenants that leads to a failure to obtain new business from them, any of which could have a material adverse effect on our business, results of operations or financial condition. If we are forced to resolve any of these disputes through litigation, our relationship with the applicable tenant could be terminated or damaged, which could lead to decreased revenue or increased costs, resulting in a corresponding adverse effect on our business, results of operations or financial condition.

## Increasing competition within our industry may materially and adversely affect our revenue.

Our industry is highly competitive and our tenants have numerous alternatives in leasing antenna space. Competition due to pricing or alternative contractual arrangements from peers could materially and adversely affect our lease rates. We may not be able to renew existing tenant leases or enter into new tenant leases, or if we are able to renew or enter into new leases, they may be at rates lower than our current rates or on less favorable terms than our current terms, resulting in an adverse impact on our results of operations and growth rate. In addition, should inflation rates exceed our fixed escalator percentages in markets where our leases include fixed escalators, our returns could be adversely affected.

Our expansion initiatives involve a number of risks and uncertainties, including those related to integrating acquired or leased assets, that could adversely affect our operating results, disrupt our operations or expose us to additional risk.

As we continue to acquire and build communications sites and other communications infrastructure assets in our existing markets and expand into new markets, we are subject to a number of risks and uncertainties, including not meeting our return on investment criteria and financial objectives, increased costs, assumed liabilities and the diversion of managerial attention. Achieving the benefits of acquisition and platform expansion initiatives depends in part on timely and efficient integration of operations, telecommunications infrastructure assets and personnel. Integration may be difficult and unpredictable for many reasons, including, among other things, portfolios without requisite permits, differing systems, cultural differences, conflicting policies, procedures and operations. Additionally, temporary business closures, social distancing measures and the potential unavailability of key personnel or a significant number of our employees as a result of COVID-19 are difficult to predict, and may have a negative impact on the timely and efficient integration of operations, telecommunications infrastructure assets and personnel. Significant acquisition-related integration costs, including certain nonrecurring charges such as costs associated with onboarding employees, integrating information technology systems, acquiring permits and visiting, inspecting, engineering and upgrading tower sites or related communications infrastructure assets, could materially and adversely affect our results of operations in the period in which such charges are recorded or our cash flow in the period in which any related costs are actually paid. Some of our acquired tower portfolios have included sites that do not meet our structural specifications, including sites that may be overburdened. In these cases, in addition to additional capital expenditures, general liability risks associated with such towers will exist until such time as those towers are upgraded or otherwise remedied. In addition, integration may



significantly burden management and internal resources, including through the potential loss or unavailability of key personnel. If we fail to successfully integrate the assets we acquire or fail to utilize such assets to their full capacity, we may not realize the benefits we expect from our acquired portfolios, and our business, financial condition and results of operations may be adversely affected. Our international expansion initiatives are subject to additional risks, such as those described above, as well as our ability to comply with bribery and anti-corruption laws such as the Foreign Corrupt Practices Act (the “FCPA”) and similar local laws.

Additionally, failure to successfully and efficiently integrate acquired assets from the Pending Telxius Acquisition (the “Telxius Assets”) into our operations may adversely affect our business, financial condition and results of operations. Integrating acquired portfolios of the Telxius Assets may require significant resources, including increased attention from our management team. Further, the significant acquisition-related integration costs could materially and adversely affect our results of operations in the periods in which such charges are recorded or our cash flow in the periods in which any related costs are actually paid. The integration of the Telxius Assets, which includes approximately 31,000 international communications sites, into our operations will be a significant undertaking, and we anticipate that we will incur certain nonrecurring charges as a result. Additional integration challenges include:

• transitioning all data related to the Telxius Assets, tenants and landlords to a common information technology system;

• successfully marketing space on the Telxius Assets;

• successfully transitioning the lease rent payment and the tenant billing and collection processes;

• retaining existing tenants on the Telxius Assets; and

• maintaining our standards, controls, procedures and policies with respect to the Telxius Assets.

Additionally, we may fail to successfully integrate the assets we acquire or fail to utilize such assets to their full capacity. If we are not able to meet these integration challenges, we may not realize the benefits we expect from our acquired portfolios and businesses, including the Pending Telxius Acquisition, and our business, financial condition and results of operations will be adversely affected.

As a result of our acquisitions, we have a substantial amount of intangible assets and goodwill. In accordance with accounting principles generally accepted in the United States (“GAAP”), we are required to assess our goodwill and other intangible assets annually or more frequently in the event of circumstances indicating potential impairment to determine if they are impaired. If, as a result of the factors noted above, the testing performed indicates that an asset may not be recoverable or the carrying value exceeds the fair value, we would be required to record a non-cash impairment charge in the period the determination is made.

Our platform expansion initiatives may not be successful, or we may be required to record impairment charges for our goodwill or for other intangible assets, which could have a material adverse effect on our business, results of operations or financial condition, and could limit our continued investments in such platform expansion initiatives.

New technologies or changes in our or a tenant’s business model could make our tower leasing business less desirable and result in decreasing revenues and operating results.

The development and implementation of new technologies designed to enhance the efficiency of wireless networks or changes in a tenant’s business model could reduce the need for tower-based wireless services, decrease demand for tower space or reduce previously obtainable lease rates. In addition, if the industry trends toward deploying increased capital to the development and implementation of new technologies, then tenants may allocate less of their budgets to leasing space on our towers. Examples of these technologies include more spectrally efficient technologies, which could relieve a portion of our tenants’ network capacity needs and, as a result, could reduce the demand for tower-based antenna space. Additionally, certain small cell complementary network technologies or satellite services could shift a portion of our tenants’ network investments away from traditional tower-based networks, which may reduce the need for carriers to add more equipment at certain communications sites. Moreover, the emergence of alternative technologies could reduce the need for tower-based broadcast services transmission and reception. Further, a tenant may decide to cease outsourcing tower infrastructure or otherwise change its business model, which would result in a decrease in our revenue and operating results. Our failure to innovate in response to the development and implementation of these or other new technologies or changes in a tenant’s business model could have a material adverse effect on the growth of our business, results of operations or financial condition. Conversely, we may invest significant capital in technologies, platform expansion initiatives or new additions to our core business that may not provide expected returns or profitability, which could divert management attention and have a material adverse effect on our operating results.



## Competition for assets could adversely affect our ability to achieve our return on investment criteria.

We may experience increased competition for the acquisition of assets or contracts to build new communications sites for tenants, which could make the acquisition of high-quality assets significantly more costly or prohibitive or cause us to lose contracts to build new sites. Some of our competitors are larger and may have greater financial resources than we do, while other competitors may apply less stringent investment criteria than we do. In addition, we may not anticipate increased competition entering a particular market or competing for the same assets. Higher prices for assets or the failure to add new assets to our portfolio could make it more difficult to achieve our anticipated returns on investment or future growth, which could materially and adversely affect our business, results of operations or financial condition.

## Risks Related to Our Financial Performance or General Economic Conditions

Our leverage and debt service obligations may materially and adversely affect our ability to raise additional financing to fund capital expenditures, future growth and expansion initiatives and to satisfy our distribution requirements.

Our leverage and debt service obligations, including as a result of our recent InSite Acquisition and the Pending Telxius Acquisition, could have significant negative consequences to our business, results of operations or financial condition, including:

• requiring the dedication of a substantial portion of our cash flow from operations to service our debt, thereby reducing the amount of our cash flow available for other purposes, including capital expenditures and REIT distributions;

• impairing our ability to meet one or more of the financial ratio covenants contained in our debt agreements or to generate cash sufficient to pay interest or principal due under those agreements, which could result in an acceleration of some or all of our outstanding debt and the loss of the towers securing such debt if a default remains uncured;

• limiting our ability to obtain additional debt or equity financing, thereby placing us at a possible competitive disadvantage to less leveraged competitors and competitors that may have better access to capital resources, including with respect to acquiring assets; and

• limiting our flexibility in planning for, or reacting to, changes in our business and the markets in which we compete.

We may need to raise additional capital through debt financing activities, asset sales or equity issuances, even if the then-prevailing market conditions are not favorable, to fund capital expenditures, future growth and expansion initiatives, required purchases of our joint venture partners' interests and to satisfy our distribution requirements and debt service obligations and leverage requirements, including financial ratio covenants. An increase in our total leverage could lead to a downgrade of our credit rating below investment grade, which could negatively impact our ability to access credit markets or preclude us from obtaining funds on investment grade terms, rates and conditions or subject us to additional loan covenants, which could accelerate our debt repayment obligations. Further, certain of our current debt instruments limit the amount of indebtedness we and our subsidiaries may incur. Additional financing, therefore, may be unavailable, more expensive or restricted by the terms of our outstanding indebtedness.

Further, extreme market volatility and disruption caused by COVID-19 may impact our ability to raise additional capital through debt and equity financing activities or our ability to repay or refinance maturing liabilities, or impact the terms of any new obligations, which in turn may have an adverse impact on our credit ratings. The extent to which COVID-19 will impact our business and financial results will depend on future developments, which are highly uncertain and cannot be predicted at this time due to the rapid evolution of this uncertain situation.

Restrictive covenants in the agreements related to our securitization transactions, our credit facilities and our debt securities could materially and adversely affect our business by limiting flexibility, and we may be prohibited from paying dividends on our common stock, which may jeopardize our qualification for taxation as a REIT.

The agreements related to our securitization transactions include operating covenants and other restrictions customary for loans subject to rated securitizations. Among other things, the borrowers under the agreements are prohibited from incurring other indebtedness for borrowed money or further encumbering their assets. A failure to comply with the covenants in the agreements could prevent the borrowers from taking certain actions with respect to the secured assets and could prevent the borrowers from distributing any excess cash from the operation of such assets to us. If the borrowers were to default on any of the loans, the servicer on such loan could seek to foreclose upon or otherwise convert the ownership of the secured assets, in which case we could lose such assets and the cash flow associated with such assets.

The agreements for our credit facilities also contain restrictive covenants and leverage and other financial maintenance tests that could limit our ability to take various actions, including incurring additional debt, guaranteeing indebtedness or making distributions to stockholders, including our required REIT distributions, and engaging in various types of transactions, including



mergers, acquisitions and sales of assets. Additionally, our credit facilities restrict our and our subsidiaries' ability to incur liens securing our or their indebtedness. These covenants could have an adverse effect on our business by limiting our ability to take advantage of financing, new tower development, mergers and acquisitions or other opportunities. Our credit agreements also contain cross-default and/or cross-acceleration provisions, which may be triggered if we default on certain indebtedness in excess of certain thresholds. In the event of such a default, the resulting cross-defaults or cross-accelerations could have an adverse effect on our business and financial condition. Further, reporting and information covenants in our credit agreements and indentures require that we provide financial and operating information within certain time periods. If we are unable to provide the required information on a timely basis, we would be in breach of these covenants. For more information regarding the covenants and requirements discussed above, please see Item 7 of this Annual Report under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources—Factors Affecting Sources of Liquidity” and note 9 to our consolidated financial statements included in this Annual Report.

We also enter into hedges for certain debt instruments, which may have an adverse impact on our results to the extent that the counterparties do not perform as expected at the inception of each hedge.

We may be adversely affected by changes in LIBOR reporting practices, the method in which LIBOR is determined or the use of alternative reference rates.

In July 2017, the United Kingdom’s Financial Conduct Authority (the “FCA”), which regulates the London Interbank Offered Rate (“LIBOR”), announced plans to phase out LIBOR rates by the end of 2021. As contemplated, the continuation of LIBOR on the current basis cannot be assured after 2021, and LIBOR may cease to exist or otherwise be unsuitable for benchmarking. While our bank facilities contain fallback provisions to establish an alternative rate in the event LIBOR is unavailable, the elimination of LIBOR could have an adverse impact on our business, results of operations, or financial condition. Financial institutions may replace LIBOR with a new index calculated by short-term repurchase agreements, the Secured Overnight Financing Rate; however, no consensus exists as to what may become accepted alternatives to LIBOR, whether LIBOR rates will cease to be published or supported before or after 2021 or whether any additional reforms to LIBOR may be enacted in the United Kingdom or elsewhere. Furthermore, the use of an alternative rate could result in increased costs, including increased interest expense, and increased borrowing and hedging costs in the future. We cannot predict the effect of the FCA’s decision not to sustain LIBOR or, if changes ultimately are made to LIBOR, the effect those changes may have on our interest expense related to borrowings under our bank facilities, certain other debt service obligations and interest swap agreements, which could potentially negatively impact our financial condition.

## Risks Related to Laws and Regulations

Our business, and that of our tenants, is subject to laws, regulations and administrative and judicial decisions, and changes thereto, that could restrict our ability to operate our business as we currently do or impact our competitive landscape.

Our business, and that of our tenants, is subject to federal, state, local and foreign laws, treaties and regulations and administrative and judicial decisions. In certain jurisdictions, these regulations, laws and treaties could be applied or be enforced retroactively. Zoning authorities and community organizations are sometimes opposed to the construction of communications sites in their communities, which can delay, prevent or increase the cost of new tower construction, modifications, additions of new antennas to a site or site upgrades, thereby limiting our ability to respond to tenant demands. Existing or new regulatory policies, regulations or laws may materially and adversely affect the timing, cost or completion of our communications sites or result in changes in the competitive landscape that may negatively affect our business. Noncompliance could result in the imposition of fines or an award of damages to litigants or result in decreased revenue. In addition, in certain jurisdictions, we and certain of our tenants are required to pay annual license fees, which may be subject to substantial increases by the government, or new fees may be enacted and applied retroactively. Governmental licenses may also be subject to periodic renewal and additional conditions to receive or maintain such license.

In addition, federal, state and local governments in many of our markets have recently taken actions to contain the spread of COVID-19, including travel bans, quarantines, shelter-in-place orders and business shutdowns, among others, and may take additional actions in the future. In response to governmental actions, we have taken a variety of measures, including providing support for our tenants remotely, requiring work-from-home arrangements and restricting travel for our employees where practicable and other modifications to our business practices. These governmental actions could remain effective for a prolonged period of time with potential material adverse impacts on our, and our tenants', business operations. Moreover, while the restrictions and limitations noted above may be relaxed or rolled back if and when COVID-19 abates or vaccinations become more prevalent, such government actions may be reinstated as the pandemic continues to evolve and in response to actual or potential resurgences. The scope and timing of any such reinstatement is difficult to predict and may materially and adversely affect our operations in the future.



Furthermore, the tax laws, regulations, applicable license terms and conditions, and interpretations governing our business, and that of our tenants, in jurisdictions where we operate, may change at any time, potentially with retroactive effect. This includes changes in tax laws, spectrum use terms, administrative compliance guidance or judicial interpretations thereof. For example, the October 2019 ruling of the Supreme Court of India regarding the definition of adjusted gross revenue (“AGR”) and associated fees and charges may have a material financial impact on certain of our tenants which could affect their ability to perform their obligations under agreements with us. Changes in laws, regulations and judicial decisions could have a more significant impact on us as a REIT relative to other REITs due to the nature of our business and our use of taxable REIT subsidiaries. These factors could materially and adversely affect our business, results of operations or financial condition.

Our foreign operations are subject to economic, political and other risks that could materially and adversely affect our revenues or financial position, including risks associated with fluctuations in foreign currency exchange rates.

Our international business operations and our potential expansion into additional new markets in the future expose us to potential adverse financial and operational problems not typically experienced in the United States. We anticipate that revenues from our international operations will continue to grow. Accordingly, our business is subject to risks associated with doing business internationally, including:

- uncertain, inconsistent or changing laws, regulations, rulings or methodologies impacting our existing and anticipated international operations, fees or other requirements directed specifically at the ownership and operation of communications sites or our international acquisitions, any of which laws, fees or requirements may be applied retroactively or with significant delay;

• failure to retain our tax status or to obtain an expected tax status for which we have applied;

- expropriation resulting in government takeover of tenant operations or governmental regulation restricting foreign ownership or requiring reversion or divestiture;

- laws or regulations that tax or otherwise restrict repatriation of earnings or other funds or otherwise limit distributions of capital;

- changes in a specific country’s or region’s political or economic conditions, including inflation or currency devaluation;

- changes to zoning regulations or construction laws, which could be applied retroactively to our existing communications sites;

- actions restricting or revoking our tenants’ spectrum licenses, or alterations or interpretations thereof, or suspending or terminating business under prior licenses;

- failure to comply with anti-bribery laws such as the FCPA or similar local anti-bribery laws, or the Office of Foreign Assets Control requirements;

• failure to comply with data privacy laws or other protections of employee health and personal information;

• material site issues related to security, fuel availability and reliability of electrical grids;

• significant increases in, or implementation of new, license surcharges on our revenue;

• loss of key personnel, including expatriates, in markets where talent is difficult or expensive to acquire; and

• price-setting or other similar laws or regulations for the sharing of passive infrastructure.

We also face risks associated with changes in foreign currency exchange rates, including those arising from the impacts of COVID-19 on the global economy and markets and those arising from our operations, investments and financing transactions related to our international business. Volatility in foreign currency exchange rates, which has recently increased as a result of uncertainties caused by COVID-19, can also affect our ability to plan, forecast and budget for our international operations and expansion efforts. Our revenues earned from our international operations are primarily denominated in their respective local currencies. We have not historically engaged in significant currency hedging activities relating to our non-U.S. Dollar operations, and a weakening of these foreign currencies against the U.S. Dollar would negatively impact our reported revenues, operating profits and income.

In addition, as we continue to invest in joint venture opportunities internationally, our partners may have business or economic goals that are inconsistent or conflict with ours, be in positions to take action contrary to our interests, policies or objectives, have competing interests in our, or other, markets that could create conflict of interest issues, withhold consents contrary to our requests or become unable or unwilling to fulfill their commitments, any of which could present governance challenges with multiple joint venture partners or expose us to additional liabilities or costs, including requiring us to assume and fulfill the obligations of that joint venture or to execute buyouts of their interests.

If we fail to remain qualified for taxation as a REIT, we will be subject to tax at corporate income tax rates, which may substantially reduce funds otherwise available, and even if we qualify for taxation as a REIT, we may face tax liabilities that impact earnings and available cash flow.



Commencing with the taxable year beginning January 1, 2012, we have operated as a REIT for federal income tax purposes. Qualification for taxation as a REIT requires the application of certain highly technical and complex provisions of the Internal Revenue Code of 1986, as amended (the "Code"), which provisions may change from time to time, to our operations as well as various factual determinations concerning matters and circumstances not entirely within our control. Further, tax legislation may adversely affect our ability to remain qualified for taxation as a REIT or the benefits or desirability of remaining so qualified. There are few judicial or administrative interpretations of the relevant provisions of the Code.

If, in any taxable year, we fail to qualify for taxation as a REIT and are not entitled to relief under the Code:

- we will not be allowed a deduction for distributions to stockholders and would be subject to federal and state income tax on our taxable income at regular corporate income tax rates, which could be substantial in amount, and may require us to borrow additional funds or liquidate some investments to pay any additional tax liability and, accordingly, may reduce funds available for other purposes; and

- we will be disqualified from REIT tax treatment for the four taxable years immediately following the year during which we were so disqualified.

We are subject to certain federal, state, local and foreign taxes on our income and assets, including taxes on any undistributed income and state, local or foreign income, franchise, property and transfer taxes. While state and local income tax regimes often parallel the U.S. federal income tax regime for REITs, many of these jurisdictions differ in their treatment of REITs. For example, some state and local jurisdictions currently or in the future may limit or eliminate a REIT’s deduction for dividends paid, which could increase our income tax expense. We are also subject to the continual examination of our income tax returns by the U.S. Internal Revenue Service and state, local and foreign tax authorities. The results of an audit and examination of previously filed tax returns and continuing assessments of our tax exposures may have an adverse effect on our provision for income taxes and cash tax liability.

Furthermore, we have owned and may from time to time own direct and indirect ownership interests in subsidiary REITs, which must also comply with the same REIT requirements that we must satisfy, together with all other rules applicable to REITs. If the subsidiary REIT is determined to have failed to qualify for taxation as a REIT and certain relief provisions do not apply, then the subsidiary REIT would be subject to federal income tax, which tax we would economically bear along with applicable penalties and interest. In addition, our ownership of shares in such subsidiary REIT would fail to be a qualifying asset for purposes of the asset tests applicable to REITs and any dividend income or gains derived by us from such subsidiary REIT may cease to be treated as income that qualifies for purposes of the 75% gross income test. These consequences could have a material adverse effect on our ability to comply with the REIT income and asset tests, and thus our ability to qualify for taxation as a REIT.

## Complying with REIT requirements may limit our flexibility or cause us to forego otherwise attractive opportunities.

Our use of TRSs enables us to engage in non-REIT qualifying business activities. Under the Code, no more than 20% of the value of the assets of a REIT may be represented by securities of one or more TRSs and no more than 25% of the value of the assets of the REIT may be represented by non-qualifying assets (including securities of one or more TRSs). This limitation may hinder our ability to make certain attractive investments or take advantage of acquisition opportunities, including the purchase of non-qualifying assets, the expansion of non-real estate activities and investments in the businesses to be conducted by our TRSs, and to that extent limit our opportunities and our flexibility to change our business strategy.

Further, as a REIT, we must distribute to our stockholders an amount equal to at least 90% of our REIT taxable income (determined before the deduction for distributed earnings and excluding any net capital gain). To meet our annual distribution requirements, we may be required to distribute amounts that may otherwise be used for our operations, including amounts that may otherwise be invested in future acquisitions, capital expenditures or repayment of debt. As no more than 25% of our gross income may consist of dividend income from our TRSs and other non-qualifying types of income, our ability to receive distributions from our TRSs may be limited, which may impact our ability to fund distributions to our stockholders or to use income of our TRSs to fund other investments.

In addition, the majority of our income and cash flows from our TRSs are generated from our international operations. In many cases, there are local withholding taxes and currency controls that may impact our ability or willingness to repatriate funds to the United States to help satisfy REIT distribution requirements.

We could have liability under environmental and occupational safety and health laws.



Our operations are subject to various federal, state, local and foreign environmental and occupational safety and health laws and regulations, including those relating to the management, use, storage, disposal, emission and remediation of, and exposure to, hazardous and non-hazardous substances, materials and wastes. As the owner, lessee or operator of real property and facilities, including generators, we may be liable for substantial costs of investigation, removal or remediation of soil and groundwater contaminated by hazardous materials, and for damages and costs relating to off-site migration of hazardous materials, without regard to whether we, as the owner, lessee or operator, knew of, or were responsible for, the contamination. We may also be liable for certain costs of remediating contamination at third-party sites to which we sent waste for disposal, even if the original disposal may have complied with all legal requirements at the time. Many of these laws and regulations contain information reporting and record keeping requirements. We may not be at all times in compliance with all environmental requirements. We may be subject to potentially significant fines or penalties if we fail to comply with any of these requirements.

The requirements of the environmental and occupational safety and health laws and regulations are complex, change frequently and could become more stringent in the future. In certain jurisdictions, these laws and regulations could be applied retroactively or be broadened to cover situations or persons not currently considered. It is possible that these requirements will change or that liabilities will arise in the future in a manner that could have a material adverse effect on our business, results of operations or financial condition. While we maintain environmental and workers' compensation insurance, we may not have adequate insurance to cover all costs, fines or penalties.

## Risks Related to the Operation of Our Business

Our towers, fiber networks, data centers or computer systems may be affected by natural disasters, security breaches and other unforeseen events for which our insurance may not provide adequate coverage.

Our towers, fiber networks, data centers and computer systems are subject to risks associated with natural disasters, such as hurricanes, ice and wind storms, tornadoes, floods, earthquakes and wildfires, as well as other unforeseen events, such as the potential adverse effects of COVID-19 or other pandemics and acts of terrorism. During the past several years, we have seen an increase in severe weather events and expect this trend to continue due to climate change. Climate change or efforts to regulate emissions may also have direct or indirect effects on our business by increasing the cost of emission compliance or fuel we need to deliver primary power to our tenants under our contractual obligations, typically through diesel-powered generators, in emerging markets. Further, any damage or destruction to, or inability to access, our towers, fiber networks, data centers or computer systems, as a result of measures implemented in response to COVID-19 or otherwise, may cause supply chain delays or impact our ability to provide services to our tenants and lead to tenant loss, which could have a material adverse effect on our business, results of operations or financial condition. Additionally, our communications sites could be subject to attacks instigated by claims that the deployment of 5G networks is linked to adverse health effects.

As part of our normal business activities and in our platform expansion initiatives or managed networks businesses, we rely on information technology and other computing resources. Our computer systems, network operation centers or power systems, or those of our cloud or Internet-based providers, could fail on their own accord and are subject to interruption or damage from power outages, computer and telecommunications failures, computer viruses, security breaches (including through cyber-attack, data theft and exploiting potentially vulnerable services, such as virtual private networks and communication and collaboration platforms as a result of increased teleworking activity as a result of COVID-19), usage errors, catastrophic events such as natural disasters and other events beyond our control. Although we and our vendors have disaster recovery programs and security measures in place, if our computer systems and our backup systems are compromised, degraded, damaged, breached or otherwise cease to function properly, we could suffer interruptions in our operations, including our ability to correctly record, process and report financial information, our tenants' network availability may be impacted or we could unintentionally allow misappropriation of proprietary or confidential information (including information about our tenants or landlords, or tenant information on our platform expansion initiatives or managed networks businesses), which could result in a loss of revenue, damage to our reputation, damage to our tenant and vendor relationships, litigation, regulatory investigations and penalties under existing or future data privacy laws and require us to incur significant costs to remediate or otherwise resolve these issues. In addition, our recent acquisitions, including acquisitions of fiber businesses, may increase our exposure to the risks described above and have material and adverse effects on our business.

While we maintain insurance coverage for natural disasters, business interruption and cybersecurity, we may not have adequate insurance to cover the associated costs of repair or reconstruction of sites or fiber for a major future event, lost revenue, including from new tenants that could have been added to our towers, fiber networks or data centers but for the event, or other costs to remediate the impact of a significant event. Further, we may be liable for damage caused by towers that collapse for any number of reasons including structural deficiencies, which could harm our reputation and require us to incur costs for which we may not have adequate insurance coverage.



Our costs could increase and our revenues could decrease due to perceived health risks from radio emissions, especially if these perceived risks are substantiated.

Public perception of possible health risks associated with cellular and other wireless communications technology could slow the growth of wireless companies, which could in turn slow our growth. In particular, negative public perception of, and regulations regarding, these perceived health risks, including claims that the deployment of 5G networks is linked to adverse health effects, could undermine the market acceptance of wireless communications services and increase opposition to the development and expansion of tower sites. If a scientific study, court decision or government agency ruling resulted in a finding that radio frequency emissions pose health risks to consumers, it could negatively impact our tenants and the market for wireless services, which could materially and adversely affect our business, results of operations or financial condition. We do not maintain any significant insurance with respect to these matters.

If we are unable to protect our rights to the land under our towers, it could adversely affect our business and operating results.

Our real property interests relating to our towers consist primarily of leasehold and sub-leasehold interests, fee interests, easements, licenses and rights-of-way. A loss of these interests at a particular tower site may interfere with our ability to operate that tower site and generate revenues. For various reasons, we may not always have the ability to access, analyze and verify all information regarding titles and other issues prior to completing an acquisition of communications sites, which can affect our rights to access and operate a site. From time to time, we also experience disputes with landowners regarding the terms of easements or ground agreements for land under towers, which can affect our ability to access and operate tower sites. Further, for various reasons, landowners may not want to renew their ground agreements with us, they may lose their rights to the land, or they may transfer their land interests to third parties, including ground lease aggregators, which could affect our ability to renew ground agreements on commercially viable terms. A significant number of the communications sites in our portfolio are located on land we lease pursuant to long-term operating leases. Further, for various reasons, title to property interests in some of the foreign jurisdictions in which we operate may not be as certain as title to our property interests in the United States. Our inability to protect our rights to the land under our towers may have a material adverse effect on our business, results of operations or financial condition.

If we are unable or choose not to exercise our rights to purchase towers that are subject to lease and sublease agreements at the end of the applicable period, our cash flows derived from those towers will be eliminated.

Our communications real estate portfolio includes towers that we operate pursuant to lease and sublease agreements that include a purchase option at the end of the lease period. We may not have the required available capital to exercise our right to purchase the towers at the end of the applicable period, or we may choose, for business or other reasons, not to do so. If we do not exercise these purchase rights, and are unable to extend the lease or sublease or otherwise acquire an interest that would allow us to continue to operate these towers after the applicable period, we will lose the cash flows derived from the towers.

## ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

## ITEM 2. PROPERTIES

As of December 31, 2020, we owned and operated a portfolio of 185,641 communications sites, including 1,781 DAS networks. See the table in Item 7 of this Annual Report, under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Executive Overview” for more detailed information on the geographic locations of our communications sites. In addition, we own property interests that we lease to communications service providers and third-party tower operators in Canada and the United States, which are included in our U.S. & Canada property segment, and in Australia, which are included in our Asia-Pacific property segment.

Our interests in our communications sites consist of a variety of ownership interests, including leases created by long-term ground lease agreements, easements, licenses or rights-of-way granted by government entities.

A typical tower site consists of a compound enclosing the tower site, a tower structure and, in some cases, one or more equipment shelters that house a variety of transmitting, receiving and switching equipment. In addition, many of our international sites typically include power generators and batteries, which are often used for primary power in lieu of an electric



grid connection in select markets. The principal types of our towers are guyed, self-supporting lattice and monopole, and rooftop towers in our international markets.

- A guyed tower includes a series of cables attaching separate levels of the tower to anchor foundations in the ground and can reach heights of up to 2,000 feet. A typical guyed broadcast tower can be located a tract of land of up to 20 acres.

- A self-supporting lattice tower typically tapers from the bottom up and usually has three or four legs. A lattice tower can reach heights of up to 1,000 feet, although most lattice structures are between 200 and 400 feet. Depending on the height of the tower, a lattice tower site can be located on a tract of land of 10,000 square feet for a rural site or fewer than 2,500 square feet for a metropolitan site.

- A monopole tower is a tubular structure that is used primarily to address space constraints or aesthetic concerns. Monopoles typically have heights ranging from 50 to 200 feet. A monopole tower site used in metropolitan areas for a typical wireless communications tower can be located on a tract of land of fewer than 2,500 square feet.

- Rooftop towers are primarily used in metropolitan areas in our Asia-Pacific, Africa, Europe and Latin America markets, where locations for traditional tower structures are unavailable. Rooftop towers typically have heights ranging from 10 to 100 feet.

U.S. & Canada Property Segment Encumbered Sites. As of December 31, 2020, the loan underlying the securitization transactions completed in March 2013 and March 2018 (the "2013 Securitization" and the "2018 Securitization", respectively, and together, the "Trust Securitizations") is secured by mortgages, deeds of trust and deeds to secure the loan on substantially all of the 5,114 broadcast and wireless communications towers and related assets owned by the borrowers (the "Trust Sites") and the secured revenue notes issued in a private transaction completed in May 2015 (the "2015 Securitization") are secured by mortgages, deeds of trust and deeds to secure debt on substantially all of the 3,538 communications sites owned by subsidiaries of the issuer (the "2015 Secured Sites"). We acquired certain debt in connection with the InSite Acquisition (the "InSite Debt"). As of December 31, 2020, the InSite Debt was secured by an aggregate of 1,946 sites. Subsequent to December 31, 2020, we repaid the entire amount outstanding under the InSite Debt (see note 9 to our consolidated financial statements included in this Annual Report).

Asia-Pacific Property Segment Encumbered Sites. There are no encumbered sites in our Asia-Pacific property segment.

Africa Property Segment Encumbered Sites. There are no encumbered sites in our Africa property segment.

Europe Property Segment Encumbered Sites. There are no encumbered sites in our Europe property segment.

Latin America Property Segment Encumbered Sites. Our outstanding indebtedness in Colombia is secured by an aggregate of 3,563 towers.

Ground Leases. Of the 183,860 towers in our portfolio as of December 31, 2020, approximately 90% were located on land we lease. Typically, we seek to enter long-term ground leases, which have initial terms of approximately five to ten years with one or more automatic or exercisable renewal periods. As a result, 43% of the ground leases for our sites have a final expiration date of 2030 and beyond.

Tenants. Our tenants are primarily wireless service providers, broadcasters and other companies in a variety of industries. For the year ended December 31, 2020, our top three tenants by total revenue were AT&T (22%), T-Mobile (19%) and Verizon Wireless (14%). Across most of our markets, our tenant leases generally have initial non-cancellable terms of five to ten years with multiple renewal terms. As a result, approximately 64% of our current tenant leases have a renewal date of 2026 or beyond.

Offices. Our principal corporate headquarters is leased and located in Boston, Massachusetts, where we currently lease approximately 40,000 square feet of office space. We also own or have entered into long-term leases for the majority of our facilities in international and regional locations for the management and operation of our property and services businesses, including offices in each of our U.S. & Canada, Asia-Pacific, Africa, Europe and Latin America segments. We believe that our owned and leased facilities are suitable and adequate to meet our anticipated needs.

## ITEM 3. LEGAL PROCEEDINGS

We periodically become involved in various claims and lawsuits that are incidental to our business. In the opinion of management, after consultation with counsel, there are no matters currently pending that would, in the event of an adverse outcome, have a material impact on our consolidated financial position, results of operations or liquidity.



ITEM 4. MINE SAFETY DISCLOSURES

N/A.



## PART II

## ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Our common stock is listed on the NYSE under the ticker symbol AMT. As of February 18, 2021, we had 444,384,437 outstanding shares of common stock and 147 registered holders.

## Dividends

As a REIT, we must annually distribute to our stockholders an amount equal to at least 90% of our REIT taxable income (determined before the deduction for distributed earnings and excluding any net capital gain). Generally, we have distributed and expect to continue to distribute all or substantially all of our REIT taxable income after taking into consideration our utilization of net operating losses (“NOLs”).

The amount, timing and frequency of future distributions will be at the sole discretion of our Board of Directors and will depend upon various factors, a number of which may be beyond our control, including our financial condition and operating cash flows, the amount required to maintain our qualification for taxation as a REIT and reduce any income and excise taxes that we otherwise would be required to pay, limitations on distributions in our existing and future debt and preferred equity instruments, our ability to utilize NOLs to offset our distribution requirements, limitations on our ability to fund distributions using cash generated through our TRSs and other factors that our Board of Directors may deem relevant.

## Performance Graph

This performance graph is furnished and shall not be deemed “filed” with the SEC or subject to Section 18 of the Exchange Act, nor shall it be deemed incorporated by reference in any of our filings under the Securities Act of 1933, as amended.

The following graph compares the cumulative total stockholder return on our common stock with the cumulative total return of the S&P 500 Index, the Dow Jones U.S. Telecommunications Equipment Index and the FTSE Nareit All Equity REITs Index. The performance graph assumes that on December 31, 2015, $100 was invested in each of our common stock, the S&P 500 Index, the Dow Jones U.S. Telecommunications Equipment Index and the FTSE Nareit All Equity REITs Index. The cumulative return shown in the graph assumes reinvestment of all dividends. The performance of our common stock reflected below is not necessarily indicative of future performance.




<table><tr><td rowspan="2"></td><td colspan="6">Cumulative Total Returns</td></tr><tr><td>12/15</td><td>12/16</td><td>12/17</td><td>12/18</td><td>12/19</td><td>12/20</td></tr><tr><td>American Tower Corporation</td><td>$100.00</td><td>$111.21</td><td>$153.13</td><td>$173.53</td><td>$256.56</td><td>$255.34</td></tr><tr><td>S&amp;P 500 Index</td><td>100.00</td><td>111.96</td><td>136.40</td><td>130.42</td><td>171.49</td><td>203.04</td></tr><tr><td>Dow Jones U.S. Telecommunications Equipment Index</td><td>100.00</td><td>119.14</td><td>146.61</td><td>159.12</td><td>184.95</td><td>189.24</td></tr><tr><td>FTSE Nareit All Equity REITs Index</td><td>100.00</td><td>108.63</td><td>118.05</td><td>113.28</td><td>145.75</td><td>138.28</td></tr></table>

## ITEM 6. SELECTED FINANCIAL DATA

N/A.

## ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The discussion and analysis of our financial condition and results of operations that follow are based upon our consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of our financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses and the related disclosure of contingent assets and liabilities at the date of our financial statements. Actual results may differ from these estimates and such differences could be material to the financial statements. This discussion should be read in conjunction with our consolidated financial statements included in this Annual Report and the accompanying notes, and the information set forth under the caption “Critical Accounting Policies and Estimates” below.

During the fourth quarter of 2020, as a result of the InSite Acquisition, we updated our reportable segments to rename U.S. property and Asia property to U.S. & Canada property and Asia-Pacific property, respectively. We continue to report our results in six segments – U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property and



services. This change was made to better align the names of our reportable segments with the geographical areas of our business operations following the InSite Acquisition. The change of our reportable segments names is solely reflective of the inclusion of Canada and Australia in our business operations, as a result of the InSite Acquisition, and had no impact on our consolidated financial statements for any prior periods. Historical financial information included in Management’s Discussion and Analysis of Financial Condition and Results of Operations has not been adjusted.

In evaluating financial performance in each business segment, management uses, among other factors, segment gross margin and segment operating profit (see note 21 to our consolidated financial statements included in this Annual Report).

## Executive Overview

We are one of the largest global REITs and a leading independent owner, operator and developer of multitenant communications real estate. Our primary business is the leasing of space on communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. In addition to the communications sites in our portfolio, we manage rooftop and tower sites for property owners under various contractual arrangements. We also hold other telecommunications infrastructure, fiber and property interests that we lease primarily to communications service providers and third-party tower operators. We refer to the business encompassing the above as our property operations, which accounted for 99% of our total revenues for the year ended December 31, 2020 and includes our U.S. & Canada property, Asia-Pacific property, Africa property, Europe property and Latin America property segments.

We also offer tower-related services in the United States, including site application, zoning and permitting and structural analysis, which primarily support our site leasing business, including the addition of new tenants and equipment on our sites.



The following table details the number of communications sites, excluding managed sites, that we owned or operated as of December 31, 2020:

<table><tr><td></td><td>Number of Owned Towers</td><td>Number of Operated Towers (1)</td><td>Number of Owned DAS Sites</td></tr><tr><td>U.S. &amp; Canada:</td><td></td><td></td><td></td></tr><tr><td>Canada (2)</td><td>208</td><td>—</td><td>—</td></tr><tr><td>United States</td><td>27,058</td><td>15,432</td><td>448</td></tr><tr><td>U.S. &amp; Canada total</td><td>27,266</td><td>15,432</td><td>448</td></tr><tr><td>Asia-Pacific: (2)</td><td></td><td></td><td></td></tr><tr><td>India</td><td>74,732</td><td>—</td><td>1,040</td></tr><tr><td>Asia-Pacific total</td><td>74,732</td><td>—</td><td>1,040</td></tr><tr><td>Africa:</td><td></td><td></td><td></td></tr><tr><td>Burkina Faso</td><td>707</td><td>—</td><td>—</td></tr><tr><td>Ghana</td><td>3,298</td><td>663</td><td>28</td></tr><tr><td>Kenya</td><td>2,397</td><td>—</td><td>9</td></tr><tr><td>Niger</td><td>720</td><td>—</td><td>—</td></tr><tr><td>Nigeria</td><td>5,823</td><td>—</td><td>—</td></tr><tr><td>South Africa</td><td>2,831</td><td>—</td><td>—</td></tr><tr><td>Uganda</td><td>3,375</td><td>—</td><td>12</td></tr><tr><td>Africa total</td><td>19,151</td><td>663</td><td>49</td></tr><tr><td>Europe:</td><td></td><td></td><td></td></tr><tr><td>France</td><td>2,769</td><td>309</td><td>9</td></tr><tr><td>Germany</td><td>2,217</td><td>—</td><td>—</td></tr><tr><td>Poland</td><td>27</td><td>—</td><td>—</td></tr><tr><td>Europe total</td><td>5,013</td><td>309</td><td>9</td></tr><tr><td>Latin America:</td><td></td><td></td><td></td></tr><tr><td>Argentina</td><td>119</td><td>—</td><td>10</td></tr><tr><td>Brazil</td><td>16,792</td><td>2,249</td><td>104</td></tr><tr><td>Chile</td><td>3,005</td><td>—</td><td>23</td></tr><tr><td>Colombia</td><td>4,992</td><td>—</td><td>4</td></tr><tr><td>Costa Rica</td><td>661</td><td>—</td><td>2</td></tr><tr><td>Mexico</td><td>9,500</td><td>186</td><td>92</td></tr><tr><td>Paraguay</td><td>1,426</td><td>—</td><td>—</td></tr><tr><td>Peru</td><td>1,935</td><td>429</td><td>—</td></tr><tr><td>Latin America total</td><td>38,430</td><td>2,864</td><td>235</td></tr></table>

(1) Approximately 95% of the operated towers are held pursuant to long-term finance leases, including those subject to purchase options.

(2) In December 2020, we launched operations in Canada and Australia through the InSite Acquisition. In Australia, we do not own or operate communications sites but control land under carrier or other third-party communications sites, which provides recurring cash flow through tenant leasing arrangements. In Canada, we also control land under carrier or other third-party communications sites.

On January 13, 2021, we signed agreements for the Pending Telxius Acquisition, pursuant to which we expect to acquire approximately 31,000 communications sites in Argentina, Brazil, Chile, Germany, Peru and Spain, for approximately 7.7 billion EUR (approximately $9.4 billion at the time of signing) at closing, subject to certain conditions and limited adjustments. The Pending Telxius Acquisition is expected to close in multiple tranches, beginning in the second quarter of 2021, subject to customary closing conditions, including government and regulatory approval. The impact of the Pending Telxius Acquisition on our 2021 results of operations will be dependent on a number of factors, including the timing of any closings.

In most of our markets, our tenant leases with wireless carriers generally have initial non-cancellable terms of five to ten years with multiple renewal terms. Accordingly, the vast majority of the revenue generated by our property operations during the year ended December 31, 2020 was recurring revenue that we should continue to receive in future periods. Based upon existing tenant leases and foreign currency exchange rates as of December 31, 2020, we expect to generate nearly $59 billion of non-cancellable tenant lease revenue over future periods, before the impact of straight-line lease accounting. Most of our tenant leases have provisions that periodically increase the rent due under the lease, typically based on an annual fixed escalation (averaging approximately 3% in the United States) or an inflationary index in most of our international markets, or a combination of both. In addition, certain of our tenant leases provide for additional revenue primarily to cover costs, such as ground rent or power and fuel costs.



The revenues generated by our property operations may be affected by cancellations of existing tenant leases. As discussed above, most of our tenant leases with wireless carriers and broadcasters are multiyear contracts, which typically are non-cancellable; however, in some instances, a lease may be canceled upon the payment of a termination fee.

Revenue lost from either tenant lease cancellations or the non-renewal of leases or rent renegotiations, which we refer to as churn, has historically not had a material adverse effect on the revenues generated by our consolidated property operations. During the year ended December 31, 2020, churn was approximately 3% of our tenant billings.

Beginning in late 2017, we experienced an increase in revenue lost from cancellations or non-renewals primarily due to carrier consolidation-driven churn in India, which compressed our gross margin and operating profit, particularly in our Asia-Pacific property segment, although this impact was partially offset by lower expenses due to reduced tenancy on existing sites and the decommissioning of certain sites. For the year ended December 31, 2020, aggregate carrier consolidation in India did not have a material impact on our consolidated property revenue, gross margin or operating profit, although overall churn rates in India remained elevated relative to historical levels.

We anticipate that our churn rate in India will moderate over time and result in reduced impacts on our property revenue, gross margin and operating profit. In the immediate term, we believe that our churn rate may remain elevated as our tenants in India evaluate the recent court rulings by the Indian Supreme Court and determine their payment plans for the AGR fees and charges prescribed by such court, as set forth in Item 1A of this Annual Report under the caption "Risk Factors—Our business, and that of our tenants, is subject to laws, regulations and administrative and judicial decisions, and changes thereto, that could restrict our ability to operate our business as we currently do or impact our competitive landscape." We expect to periodically evaluate the carrying value of our Indian assets, which may result in the realization of additional impairment expense or other similar charges. For more information, please see the information under the caption "Management's Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates."

Additionally, we expect that our churn rate in our U.S. & Canada property segment will be elevated for a period of several years due to contractual lease cancellations and non-renewals by T-Mobile, including legacy Sprint Corporation leases, pursuant to the terms of the T-Mobile MLA signed in September 2020.

As further set forth in Item 1A of this Annual Report under the captions “Risk Factors,” the ongoing COVID-19 pandemic, as well as the response to mitigate its spread and effects, may adversely impact us and our tenants and the demand for our communications sites in the United States and globally. We have taken a variety of actions to ensure the continued availability of our communications sites, while ensuring the safety and security of our employees, tenants, vendors and surrounding communities. These measures include providing support for our tenants remotely, requiring work-from-home arrangements and restricting travel for our employees where practicable and other modifications to our business practices. We will continue to actively monitor the situation and may take further actions as may be required by governmental authorities or that we determine are in the best interests of our employees, tenants and business partners.

As a result of the impact of COVID-19 on global financial markets, foreign currency exchange rates have been volatile in many of the markets in which we operate. We estimate that the adverse impact from changes in foreign currency exchange rates on our consolidated revenue and operating profit in the current period, as compared to the year ended December 31, 2019, was approximately $315 million and $172 million, respectively. If exchange rates become significantly more unfavorable, the impact to our revenue and other future operating results could be material. Additionally, the impact of COVID-19 on our operational results in subsequent periods will largely depend on future developments, which are highly uncertain and cannot be accurately predicted at this time. These developments may include, but are not limited to, new information concerning the severity and duration of the COVID-19 pandemic, the degree of success of actions taken to contain or treat COVID-19, including the availability and effectiveness of vaccines and treatments, and the reactions by consumers, companies, governmental entities and capital markets to such actions.

Property Operations Revenue Growth. Due to our diversified communications site portfolio, our tenant lease rates vary considerably depending upon numerous factors, including, but not limited to, amount, type and position of tenant equipment on the tower, remaining tower capacity and tower location. We measure the remaining tower capacity by assessing several factors, including tower height, tower type, environmental conditions, existing equipment on the tower and zoning and permitting regulations in effect in the jurisdiction where the tower is located. In many instances, tower capacity can be increased with relatively modest tower augmentation capital expenditures, which are often reimbursed to us.

The primary factors affecting the revenue growth of our property segments are:

• Growth in tenant billings, including:

• New revenue attributable to leasing additional space on our sites (“colocations”) and lease amendments;

• Contractual rent escalations on existing tenant leases, net of churn; and



- New revenue attributable to leases in place on day one on sites acquired or constructed since the beginning of the prior-year period.

- Revenue growth from other items, including additional tenant payments primarily to cover costs, such as ground rent or power and fuel costs included in certain tenant leases (“pass-through”), straight-line revenue and decommissioning.

We continue to believe that our site leasing revenue is likely to increase due to the growing use of wireless services globally and our ability to meet the corresponding incremental demand for our communications real estate. By adding new tenants and new equipment for existing tenants on our sites, we are able to increase these sites' utilization and profitability. We believe the majority of our site leasing activity will continue to come from wireless service providers, with tenants in a number of other industries contributing incremental leasing demand. Our site portfolio and our established tenant base provide us with new business opportunities, which have historically resulted in consistent and predictable organic revenue growth as wireless carriers seek to increase the coverage and capacity of their existing networks, while also deploying next generation wireless technologies. In addition, we intend to continue to supplement our organic growth by selectively developing or acquiring new sites in our existing and new markets where we can achieve our risk-adjusted return on investment objectives.

Property Operations Organic Revenue Growth. Consistent with our strategy to increase the utilization and return on investment from our sites, our objective is to add new tenants and new equipment for existing tenants through colocation and lease amendments. Our ability to lease additional space on our sites is primarily a function of the rate at which wireless carriers and other tenants deploy capital to improve and expand their wireless networks. This rate, in turn, is influenced by the growth of wireless services, the penetration of advanced wireless devices, the level of emphasis on network quality and capacity in carrier competition, the financial performance of our tenants and their access to capital and general economic conditions. According to industry data, recent aggregate annual wireless capital spending in the United States has averaged at least $30 billion, resulting in consistent demand for our sites.

Based on industry research and projections, we expect that a number of key industry trends will result in incremental revenue opportunities for us:

- In less advanced wireless markets where network deployments are in earlier stages, we expect these deployments to drive demand for our tower space as carriers seek to expand their footprints and increase the scope and density of their networks. We have established operations in many of these markets at the early stages of wireless development, which we believe will enable us to meaningfully participate in these deployments over the long term.

- Subscribers’ use of mobile data continues to grow rapidly given increasing smartphone and other advanced device penetration, the proliferation of bandwidth-intensive applications on these devices and the continuing evolution of the mobile ecosystem. We believe carriers will be compelled to deploy additional equipment on existing networks while also rolling out more advanced wireless networks to address coverage and capacity needs resulting from this increasing mobile data usage.

- The deployment of advanced mobile technology, such as 4G and 5G, will provide higher speed data services and further enable fixed broadband substitution. As a result, we expect that our tenants will continue deploying additional equipment across their existing networks.

- Wireless service providers compete based on the quality of their networks, which is driven by capacity and coverage. To maintain or improve their network performance as overall network usage increases, our tenants continue to deploy additional equipment across their existing sites while also adding new cell sites. We anticipate increasing network densification over the next several years, as existing network density is anticipated to be insufficient to account for rapidly increasing levels of wireless data usage.

- Wireless service providers continue to acquire additional spectrum, and as a result are expected to add additional sites and equipment to their networks as they seek to optimize their network configuration and utilize additional spectrum. We expect this to be particularly relevant in the context of higher-band spectrum such as 2.5 gigahertz (GHz) and C-Band being deployed for 5G, as these spectrum assets tend to have more limited propagation characteristics compared to the lower-band spectrum that has historically been deployed on our towers.

- Next generation technologies requiring wireless connectivity have the potential to provide incremental revenue opportunities for us. These technologies may include edge computing functionality, autonomous vehicle networks and a number of other internet-of-things, or IoT, applications, as well as other potential use cases for wireless services. These technologies may create new and complementary use cases for our communications real estate over time, although these use cases are currently in nascent stages.

As part of our international expansion initiatives, we have targeted markets in various stages of network development to diversify our international exposure and position us to benefit from a number of different wireless technology deployments over the long term. For example, as part of our Pending Telxius Acquisition, we expect to increase our exposure to more developed markets in Europe. In addition, we have focused on building relationships with large multinational carriers to increase the opportunities for growth or mutually beneficial transactional opportunities across common markets. We believe that consistent



carrier network investments across our international markets will, over the long term, position us to generate meaningful organic revenue growth going forward.

In emerging markets, such as Burkina Faso, Ghana, India, Kenya, Niger, Nigeria and Uganda, wireless networks tend to be significantly less advanced than those in the United States, and initial voice networks continue to be deployed in certain underdeveloped areas. A majority of consumers in these markets still utilize basic wireless services and advanced device penetration remains low. In more developed urban locations within these markets, mobile data usage tends to be higher and advanced network deployments are further along. Carriers are focused on completing voice network build-outs while increasing investments in data networks as mobile data usage and smartphone penetration within their customer bases begin to accelerate.

In India, the ongoing transition from 2G technology to 4G technology has included a period of carrier consolidation, whereby the number of carriers operating in the marketplace has been reduced through mergers, acquisitions and select carrier exits from the marketplace, which we believe is now substantially complete. We believe that this consolidation process has resulted in an industry structure for both the wireless carriers and communications infrastructure providers that will be more conducive to sustained growth and profitability over time.

In markets with rapidly evolving network technology, such as South Africa, Poland and most of the countries in Latin America where we do business, initial voice networks, for the most part, have already been built out, and carriers are increasingly focused on 4G network deployments. Consumers in these regions are increasingly adopting smartphones and other advanced devices, in particular as lower cost smartphones become increasingly available. As a result, the usage of bandwidth-intensive mobile applications is growing materially. Recent spectrum auctions in these rapidly evolving markets have allowed incumbent carriers to accelerate their data network deployments and have also enabled new entrants to begin initial investments in data networks. Smartphone penetration and wireless data usage in these markets are advancing rapidly, which typically requires that carriers continue to invest in their networks to maintain and augment their quality of service.

Finally, in markets with more mature network technology, such as Australia, Canada, Germany, France and, following the expected closing of our Pending Telxius Acquisition, Spain, carriers are focused on deploying 4G data networks to account for rapidly increasing wireless data usage among their customer base. With higher smartphone and advanced device penetration and significantly higher per capita data usage, carrier investment in networks is focused on 4G coverage and capacity, as well as the early stages of 5G deployment.

We believe that the network technology migration we have seen in the United States, which has led to significantly denser networks and meaningful new business commencements for us over a number of years, will be replicated in our international markets over time. As a result, we expect to be able to leverage our extensive international portfolio of approximately 143,000 communications sites and the relationships we have built with our carrier tenants to drive sustainable, long-term growth.

We have master lease agreements with many of our tenants that provide for consistent, long-term revenue and reduce the likelihood of non-contractual churn. Certain of those master lease agreements are comprehensive in nature and further build and augment strong strategic partnerships with our tenants while significantly reducing colocation cycle times, thereby providing our tenants with the ability to rapidly and efficiently deploy equipment on our sites.

Demand for our communications sites could be negatively impacted by a number of factors, including an increase in network sharing or consolidation among our tenants, as set forth in Item 1A of this Annual Report under the captions “Risk Factors—If our tenants consolidate their operations, exit the telecommunications business or share site infrastructure to a significant degree, our growth, revenue and ability to generate positive cash flows could be materially and adversely affected” and “Risk Factors—A substantial portion of our revenue is derived from a small number of tenants, and we are sensitive to adverse changes in the creditworthiness and financial strength of our tenants.” In addition, the emergence and growth of new technologies could reduce demand for our sites, as set forth under the caption “Risk Factors—New technologies or changes in our or a tenant’s business model could make our tower leasing business less desirable and result in decreasing revenues and operating results.” Further, our tenants may be subject to new regulatory policies from time to time that materially and adversely affect the demand for our communications sites.

Property Operations New Site Revenue Growth. During the year ended December 31, 2020, we grew our portfolio of communications real estate through the acquisition and construction of approximately 9,365 sites globally. In a majority of our Asia-Pacific, Africa, Europe and Latin America markets, the revenue generated from newly acquired or constructed sites resulted in increases in both tenant and pass-through revenues (such as ground rent or power and fuel costs) and expenses. We continue to evaluate opportunities to acquire communications real estate portfolios, both domestically and internationally, to determine whether they meet our risk-adjusted hurdle rates and whether we believe we can effectively integrate them into our existing portfolio.



<table><tr><td>New Sites (Acquired or Constructed)</td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>U.S. &amp; Canada</td><td>2,255</td><td>430</td><td>285</td></tr><tr><td>Asia-Pacific</td><td>3,960</td><td>3,330</td><td>21,470</td></tr><tr><td>Africa</td><td>1,540</td><td>6,455</td><td>1,040</td></tr><tr><td>Europe</td><td>610</td><td>15</td><td>15</td></tr><tr><td>Latin America</td><td>1,000</td><td>3,475</td><td>1,655</td></tr></table>

Property Operations Expenses. Direct operating expenses incurred by our property segments include direct site level expenses and consist primarily of ground rent and power and fuel costs, some or all of which may be passed through to our tenants, as well as property taxes and repairs and maintenance expenses. These segment direct operating expenses exclude all segment and corporate selling, general, administrative and development expenses, which are aggregated into one line item entitled Selling, general, administrative and development expense in our consolidated statements of operations. In general, our property segments' selling, general, administrative and development expenses do not significantly increase as a result of adding incremental tenants to our sites and typically increase only modestly year-over-year. As a result, leasing additional space to new tenants on our sites provides significant incremental gross margin and cash flow. We may, however, incur additional segment selling, general, administrative and development expenses as we increase our presence in our existing markets or expand into new markets. Our profit margin growth is therefore positively impacted by the addition of new tenants to our sites but can be temporarily diluted by our development activities.

Services Segment Revenue Growth. As we continue to focus on growing our property operations, we anticipate that our services revenue will continue to represent a small percentage of our total revenues.

## Non-GAAP Financial Measures

Included in our analysis of our results of operations are discussions regarding earnings before interest, taxes, depreciation, amortization and accretion, as adjusted (“Adjusted EBITDA”), Funds From Operations, as defined by the National Association of Real Estate Investment Trusts (“Nareit FFO”) attributable to American Tower Corporation common stockholders, Consolidated Adjusted Funds From Operations (“Consolidated AFFO”) and AFFO attributable to American Tower Corporation common stockholders.

We define Adjusted EBITDA as Net income before Income (loss) from equity method investments; Income tax benefit (provision); Other income (expense); Gain (loss) on retirement of long-term obligations; Interest expense; Interest income; Other operating income (expense); Depreciation, amortization and accretion; and stock-based compensation expense.

Nareit FFO attributable to American Tower Corporation common stockholders is defined as net income before gains or losses from the sale or disposal of real estate, real estate related impairment charges, real estate related depreciation, amortization and accretion and dividends on preferred stock, and including adjustments for (i) unconsolidated affiliates and (ii) noncontrolling interests. In this section, we refer to Nareit FFO attributable to American Tower Corporation common stockholders as “Nareit FFO (common stockholders).”

We define Consolidated AFFO as Nareit FFO (common stockholders) before (i) straight-line revenue and expense; (ii) stock-based compensation expense; (iii) the deferred portion of income tax; (iv) non-real estate related depreciation, amortization and accretion; (v) amortization of deferred financing costs, capitalized interest, debt discounts and premiums and long-term deferred interest charges; (vi) other income (expense); (vii) gain (loss) on retirement of long-term obligations; (viii) other operating income (expense); and adjustments for (ix) unconsolidated affiliates and (x) noncontrolling interests, less cash payments related to capital improvements and cash payments related to corporate capital expenditures.

We define AFFO attributable to American Tower Corporation common stockholders as Consolidated AFFO, excluding the impact of noncontrolling interests on both Nareit FFO (common stockholders) and the other adjustments included in the calculation of Consolidated AFFO. In this section, we refer to AFFO attributable to American Tower Corporation common stockholders as “AFFO (common stockholders).”

Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO and AFFO (common stockholders) are not intended to replace net income or any other performance measures determined in accordance with GAAP. None of Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO or AFFO (common stockholders) represents cash flows from operating activities in accordance with GAAP and, therefore, these measures should not be considered indicative of cash flows from operating activities, as a measure of liquidity or a measure of funds available to fund our cash needs, including our ability to make cash distributions. Rather, Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO and AFFO (common stockholders) are presented as we believe each is a useful indicator of our current operating performance. We believe that these metrics are useful to an investor in evaluating our operating performance because (1) each is a key measure



used by our management team for decision making purposes and for evaluating our operating segments' performance; (2) Adjusted EBITDA is a component underlying our credit ratings; (3) Adjusted EBITDA is widely used in the telecommunications real estate sector to measure operating performance as depreciation, amortization and accretion may vary significantly among companies depending upon accounting methods and useful lives, particularly where acquisitions and non-operating factors are involved; (4) Consolidated AFFO is widely used in the telecommunications real estate sector to adjust Nareit FFO (common stockholders) for items that may otherwise cause material fluctuations in Nareit FFO (common stockholders) growth from period to period that would not be representative of the underlying performance of property assets in those periods; (5) each provides investors with a meaningful measure for evaluating our period-to-period operating performance by eliminating items that are not operational in nature; and (6) each provides investors with a measure for comparing our results of operations to those of other companies, particularly those in our industry.

Our measurement of Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO and AFFO (common stockholders) may not, however, be fully comparable to similarly titled measures used by other companies. Reconciliations of Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO and AFFO (common stockholders) to net income, the most directly comparable GAAP measure, have been included below.



## Results of Operations

## Year Ended December 31, 2019 Compared to Year Ended December 31, 2018

For a discussion of our 2019 Results of Operations, including a discussion of our financial results for the fiscal year ended December 31, 2019 compared to the fiscal year ended December 31, 2018, refer to Part I, Item 7 of our annual report on Form 10-K filed with the SEC on February 25, 2020 (the "2019 Form 10-K").

During the fourth quarter of 2020, as a result of the InSite Acquisition, we updated our reportable segments to rename U.S. property and Asia property to U.S. & Canada property and Asia-Pacific property, respectively. The change of our reportable segments names is solely reflective of the inclusion of Canada and Australia in our business operations, as a result of the InSite Acquisition, and had no impact on our consolidated financial statements for any prior periods. Historical financial information included in Part I, Item 7 of the 2019 Form 10-K has not been adjusted.

## Years Ended December 31, 2020 and 2019

(in millions, except percentages)

Revenue

<table><tr><td rowspan="2"></td><td colspan="3">Year Ended December 31,</td><td rowspan="2">Percent Change 2020 vs 2019</td></tr><tr><td>2020</td><td>2019</td><td></td></tr><tr><td>Property</td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. &amp; Canada</td><td>$ 4,517.0</td><td>$ 4,188.7</td><td>8%</td><td></td></tr><tr><td>Asia-Pacific</td><td>1,139.4</td><td>1,217.0</td><td>(6)</td><td></td></tr><tr><td>Africa</td><td>890.2</td><td>583.9</td><td>52</td><td></td></tr><tr><td>Europe</td><td>149.6</td><td>134.6</td><td>11</td><td></td></tr><tr><td>Latin America</td><td>1,257.4</td><td>1,340.7</td><td>(6)</td><td></td></tr><tr><td>Total property</td><td>7,953.6</td><td>7,464.9</td><td>7</td><td></td></tr><tr><td>Services</td><td>87.9</td><td>115.4</td><td>(24)</td><td></td></tr><tr><td>Total revenues</td><td>$ 8,041.5</td><td>$ 7,580.3</td><td>6%</td><td></td></tr></table>

Year ended December 31, 2020

U.S. & Canada property segment revenue growth of $328.3 million was attributable to:

• Tenant billings growth of $196.1 million, which was driven by:

• $134.3 million due to colocations and amendments;

• $57.4 million from contractual escalations, net of churn (as discussed above, we expect that our churn rate will be elevated for a period of several years pursuant to the terms of the T-Mobile MLA); and

• $16.1 million generated from newly acquired or constructed sites;

• Partially offset by a decrease of $11.7 million from other tenant billings; and

- An increase of $132.2 million in other revenue, which includes a $135.1 million increase due to straight-line accounting as a result of the T-Mobile MLA and the full year to date impact of the our master lease agreement entered into with AT&T in August 2019.

Segment revenue growth was not meaningfully impacted by foreign currency translation related to fluctuations in the Canadian Dollar. The InSite Acquisition did not meaningfully impact revenue growth during the current period due to the timing of the closing in December 2020. We expect the assets acquired from InSite to generate approximately $150 million in property revenue in 2021.

Asia-Pacific property segment revenue decrease of $77.6 million was attributable to:

- A decrease of $30.3 million in other revenue, primarily due to a decrease in tenant settlement payments received attributable to prior tenant cancellations; and

• A decrease of $8.1 million in pass-through revenue;

• Partially offset by an increase of $18.3 million in tenant billings, which was driven by:

• $69.0 million due to colocations and amendments; and

• $19.6 million generated from newly acquired or constructed sites;

• Partially offset by:

A decrease of $69.4 million resulting from churn in excess of contractual escalations; and

A decrease of $0.9 million from other tenant billings.



Segment revenue decline included a decrease of $57.5 million attributable to the negative impact of foreign currency translation related to fluctuations in Indian Rupee (“INR”). 

Africa property segment revenue growth of $306.3 million was attributable to: 

- Tenant billings growth of $245.0 million, which was driven by: 

  - $206.2 million generated from newly acquired or constructed sites, primarily due to the Eaton Towers Acquisition; 

  - $24.9 million due to colocations and amendments; 

  - $13.1 million from contractual escalations, net of churn; and 

  - $0.8 million from other tenant billings; 

- An increase of $71.0 million in pass-through revenue, including amounts related to the Eaton Towers Acquisition; and 

- An increase of $30.7 million in other revenue. 

Segment revenue growth was partially offset by a decrease of $40.4 million attributable to the negative impact of foreign currency translation, which included, among others, $16.7 million related to fluctuations in South African Rand and $11.6 million related to fluctuations in Ghanaian Cedi. 

Europe property segment revenue growth of $15.0 million was attributable to: 

- Tenant billings growth of $6.7 million, which was driven by: 

  - $4.1 million due to colocations and amendments; 

  - $4.0 million generated from newly acquired or constructed sites, primarily attributable to the Orange Acquisition; and 

  - $0.2 million from other tenant billings; 

  - Partially offset by a decrease of $1.6 million resulting from churn in excess of contractual escalations; 

- An increase of $5.2 million in other revenue; and 

- An increase of $0.1 million in pass-through revenue. 

Segment revenue growth included an increase of $3.0 million attributable to the positive impact of foreign currency translation related to fluctuations in EUR. 

Latin America property segment revenue decrease of $83.3 million was attributable to: 

- A decrease of $15.7 million in other revenue, primarily due to the nonrecurrence of an $11.6 million tenant settlement payment in Mexico in the prior-year period; 

- Partially offset by an increase of $46.7 million in pass-through revenue and an increase of $108.1 million in tenant billings, which was driven by: 

  - $43.5 million generated from newly acquired or constructed sites, primarily due to the Entel Acquisition; 

  - $35.4 million due to colocations and amendments; 

  - $25.6 million from contractual escalations, net of churn; and 

  - $3.6 million from other tenant billings. 

Segment revenue decline included a decrease of $222.4 million attributable to the negative impact of foreign currency translation, which included, among others, $149.2 million related to fluctuations in Brazilian Real, $49.6 million related to fluctuations in Mexican Peso and $11.9 million related to fluctuations in Colombian Peso. 

The decrease in services segment revenue of $27.5 million was primarily attributable to a decrease in site application, zoning and permitting services. 

Gross Margin 

<table><tr><td rowspan="2"></td><td colspan="2">Year Ended December 31,</td><td rowspan="2">Percent<br/>Change 2020<br/>vs 2019</td></tr><tr><td>2020</td><td>2019</td></tr><tr><td>Property</td><td></td><td></td><td></td></tr><tr><td>U.S. &amp; Canada</td><td>$ 3,709.0</td><td>$ 3,380.8</td><td>10 %</td></tr><tr><td>Asia-Pacific</td><td>478.0</td><td>501.1</td><td>(5)</td></tr><tr><td>Africa</td><td>592.5</td><td>374.9</td><td>58</td></tr><tr><td>Europe</td><td>121.5</td><td>106.8</td><td>14</td></tr><tr><td>Latin America</td><td>864.9</td><td>929.4</td><td>(7)</td></tr><tr><td>Total property</td><td>5,765.9</td><td>5,293.0</td><td>9</td></tr><tr><td>Services</td><td>51.4</td><td>73.3</td><td>(30)%</td></tr></table>



- The increase in U.S. & Canada property segment gross margin was primarily attributable to the increase in revenue described above. The InSite Acquisition did not meaningfully impact U.S. & Canada property segment gross margin during the current period due to the timing of the closing in December 2020. We expect the assets acquired from InSite to generate approximately $115 million in gross margin in 2021.

- The decrease in Asia-Pacific property segment gross margin was primarily attributable to the decrease in revenue described above, partially offset by a decrease in direct expenses of $21.1 million, primarily due to a combination of (i) lower land rent costs, partially due to site decommissioning, and (ii) lower security and monitoring costs. Direct expenses also benefited by $33.4 million from the impact of foreign currency translation.

- The increase in Africa property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $104.3 million, primarily due to the Eaton Towers Acquisition. Direct expenses also benefited by $15.6 million from the impact of foreign currency translation.

- The increase in Europe property segment gross margin was primarily attributable to the increase in revenue described above and a decrease in direct expenses of $0.2 million. Direct expenses were negatively impacted by $0.5 million attributable to the impact of foreign currency translation.

- The decrease in Latin America property segment gross margin was primarily attributable to the decrease in revenue described above and an increase in direct expenses of $52.5 million, primarily due to the Entel Acquisition. Direct expenses also benefited by $71.3 million from the impact of foreign currency translation.

- The decrease in services segment gross margin was primarily due to the decrease in revenue described above, partially offset by a decrease in direct expenses of $5.6 million.

Selling, General, Administrative and Development Expense (“SG&A”)

<table><tr><td rowspan="2"></td><td colspan="3">Year Ended December 31,</td><td rowspan="2">Percent Change 2020 vs 2019</td></tr><tr><td>2020</td><td>2019</td><td></td></tr><tr><td>Property</td><td></td><td></td><td></td><td></td></tr><tr><td>U.S. &amp; Canada</td><td>$</td><td>162.2</td><td>$</td><td>175.5</td></tr><tr><td>Asia-Pacific</td><td></td><td>97.4</td><td></td><td>99.9</td></tr><tr><td>Africa</td><td></td><td>94.4</td><td></td><td>53.7</td></tr><tr><td>Europe</td><td></td><td>23.0</td><td></td><td>23.2</td></tr><tr><td>Latin America</td><td></td><td>93.1</td><td></td><td>101.0</td></tr><tr><td>Total property</td><td></td><td>470.1</td><td></td><td>453.3</td></tr><tr><td>Services</td><td></td><td>14.8</td><td></td><td>12.0</td></tr><tr><td>Other</td><td></td><td>293.8</td><td></td><td>265.1</td></tr><tr><td>Total selling, general, administrative and development expense</td><td>$</td><td>778.7</td><td>$</td><td>730.4</td></tr></table>

## Year Ended December 31, 2020

- The decrease in our U.S. & Canada property segment SG&A was primarily driven by a decrease in legal costs as compared to the prior-year period and lower travel and discretionary spending as a result of the COVID-19 pandemic and stay-at-home orders.

- The decrease in our Asia-Pacific property segment SG&A was primarily driven by the benefit of foreign currency translation on SG&A and lower travel spending, partially offset by increased personnel costs and an increase in bad debt expense of $3.1 million.

- The increase in our Africa property segment SG&A was primarily driven by increased personnel costs to support our business, including due to the Eaton Towers Acquisition, and an increase in bad debt expense of $23.5 million as a result of receivable reserves with certain tenants.

• Our Europe property segment SG&A remained relatively consistent as compared to the prior-year period.

- The decrease in our Latin America property segment SG&A was primarily driven by the benefit of foreign currency translation on SG&A, partially offset by increased personnel costs, including costs to support our fiber business.



- The increase in our services segment SG&A was primarily driven by an increase in personnel costs, partially offset by lower travel and discretionary spending as a result of the COVID-19 pandemic and stay-at-home orders.

- The increase in other SG&A was primarily attributable to an increase in stock-based compensation expense of $9.2 million and an increase in corporate SG&A, including an increase in personnel costs and charitable contributions.

Operating Profit

<table><tr><td rowspan="2"></td><td colspan="2">Year Ended December 31,</td><td rowspan="2">Percent Change 2020 vs 2019</td></tr><tr><td>2020</td><td>2019</td></tr><tr><td>Property</td><td></td><td></td><td></td></tr><tr><td>U.S. &amp; Canada</td><td>$ 3,546.8</td><td>$ 3,205.3</td><td>11%</td></tr><tr><td>Asia-Pacific</td><td>380.6</td><td>401.2</td><td>(5)</td></tr><tr><td>Africa</td><td>498.1</td><td>321.2</td><td>55</td></tr><tr><td>Europe</td><td>98.5</td><td>83.6</td><td>18</td></tr><tr><td>Latin America</td><td>771.8</td><td>828.4</td><td>(7)</td></tr><tr><td>Total property</td><td>5,295.8</td><td>4,839.7</td><td>9</td></tr><tr><td>Services</td><td>36.6</td><td>61.3</td><td>(40)%</td></tr></table>

Year Ended December 31, 2020

- The increase in operating profit for our U.S. & Canada property segment was primarily attributable to an increase in our segment gross margin and a decrease in our segment SG&A.

- The decreases in operating profit for our Asia-Pacific and Latin America property segments were primarily attributable to decreases in our segment gross margin, partially offset by decreases in our segment SG&A.

- The increase in operating profit for our Africa property segment was primarily attributable to an increase in our segment gross margin, partially offset by an increase in our segment SG&A.

- The increase in operating profit for our Europe property segment was primarily attributable to an increase in our segment gross margin.

- The decrease in operating profit for our services segment was primarily attributable to a decrease in our segment gross margin and an increase in our segment SG&A.

Depreciation, Amortization and Accretion

<table><tr><td rowspan="2"></td><td colspan="2">Year Ended December 31,</td><td rowspan="2">Percent Change 2020 vs 2019</td></tr><tr><td>2020</td><td>2019</td></tr><tr><td>Depreciation, amortization and accretion</td><td>$ 1,882.3</td><td>$ 1,778.4</td><td>6%</td></tr></table>

The increase in depreciation, amortization and accretion expense for the year ended December 31, 2020 was primarily attributable to the acquisition, lease or construction of new sites since the beginning of the prior-year period, including due to the Eaton Towers Acquisition and the Entel Acquisition, which resulted in increases in property and equipment and intangible assets subject to amortization, partially offset by foreign currency exchange rate fluctuations.

Other Operating Expenses

<table><tr><td rowspan="2"></td><td colspan="2">Year Ended December 31,</td><td rowspan="2">Percent Change 2020 vs 2019</td></tr><tr><td>2020</td><td>2019</td></tr><tr><td>Other operating expenses</td><td>$ 265.8</td><td>$ 166.3</td><td>60%</td></tr></table>

The increase in other operating expenses for the year ended December 31, 2020 was primarily attributable to increases in impairment charges of $128.6 million, including an increase of $66.2 million in impairment charges related to Right-of-use assets. These items were partially offset by a decrease in losses on sales or disposals of assets of $27.8 million and a one-time benefit in Brazil in the current period.



<table><tr><td rowspan="2"></td><td colspan="3">Year Ended December 31,</td><td rowspan="2">Percent Change 2020 vs 2019</td></tr><tr><td>2020</td><td>2019</td><td></td></tr><tr><td>Total Other expense</td><td>$ 1,066.4</td><td>$ 772.0</td><td></td><td>38 %</td></tr></table>

Total other expense consists primarily of interest expense and realized and unrealized foreign currency gains and losses. We record unrealized foreign currency gains or losses as a result of foreign currency exchange rate fluctuations primarily associated with our intercompany notes and similar unaffiliated balances denominated in a currency other than the subsidiaries' functional currencies.

The increase in total other expense during the year ended December 31, 2020 was due to foreign currency losses of $216.4 million in the current period, as compared to foreign currency gains of $6.1 million in the prior-year period, and a loss on retirement of long-term obligations of $71.8 million in the current period, attributable to the repayment of our 5.900% senior unsecured notes due 2021 (the “5.900% Notes”), our 3.300% senior unsecured notes due 2021 (the “3.300% Notes”) and our 3.450% senior unsecured notes due 2021 (the “3.450% Notes”), as compared to a loss on retirement of long-term obligations of $22.2 million during the prior-year period, primarily attributable to the repayment of our 5.050% senior unsecured notes due 2020 (the “5.050% Notes”).

Income Tax Provision (Benefit)

<table><tr><td rowspan="2"></td><td colspan="3">Year Ended December 31,</td><td rowspan="2">Percent Change 2020 vs 2019</td></tr><tr><td>2020</td><td>2019</td><td></td></tr><tr><td>Income tax provision (benefit)</td><td>$ 129.6</td><td>$ (0.2)</td><td></td><td>(64,900)%</td></tr><tr><td>Effective tax rate</td><td>7.1 %</td><td>(0.0)%</td><td></td><td></td></tr></table>

As a REIT, we may deduct earnings distributed to stockholders against the income generated by our REIT operations. In addition, we are able to offset certain income by utilizing our NOLs, subject to specified limitations. Consequently, the effective tax rate on income from continuing operations for each of the years ended December 31, 2020 and 2019 differs from the federal statutory rate.

The change in the income tax provision (benefit) for the year ended December 31, 2020 was primarily attributable to a $113.0 million one-time tax benefit included in the prior-year period arising from revaluing our net deferred tax liability due to tax law changes in India, partially offset by changes in the valuation allowance in the current year.

Net Income / Adjusted EBITDA and Net Income / Nareit FFO attributable to American Tower Corporation common stockholders / Consolidated AFFO / AFFO attributable to American Tower Corporation common stockholders

<table><tr><td rowspan="2"></td><td colspan="3">Year Ended December 31,</td><td rowspan="2">Percent Change 2020 vs 2019</td></tr><tr><td>2020</td><td>2019</td><td></td></tr><tr><td>Net income</td><td>$ 1,691.5</td><td>$ 1,916.6</td><td></td><td>(12)%</td></tr><tr><td>Income tax provision (benefit)</td><td>129.6</td><td>(0.2)</td><td></td><td>(64,900)</td></tr><tr><td>Other expense (income)</td><td>240.8</td><td>(17.6)</td><td></td><td>(1,468)</td></tr><tr><td>Loss on retirement of long-term obligations</td><td>71.8</td><td>22.2</td><td></td><td>223</td></tr><tr><td>Interest expense</td><td>793.5</td><td>814.2</td><td></td><td>(3)</td></tr><tr><td>Interest income</td><td>(39.7)</td><td>(46.8)</td><td></td><td>(15)</td></tr><tr><td>Other operating expenses</td><td>265.8</td><td>166.3</td><td></td><td>60</td></tr><tr><td>Depreciation, amortization and accretion</td><td>1,882.3</td><td>1,778.4</td><td></td><td>6</td></tr><tr><td>Stock-based compensation expense</td><td>120.8</td><td>111.4</td><td></td><td>8</td></tr><tr><td>Adjusted EBITDA</td><td>$ 5,156.4</td><td>$ 4,744.5</td><td></td><td>9 %</td></tr></table>



<table><tr><td rowspan="2"></td><td colspan="3">Year Ended December 31,</td><td rowspan="2">Percent Change 2020 vs 2019</td></tr><tr><td>2020</td><td>2019</td><td></td></tr><tr><td>Net income</td><td>$ 1,691.5</td><td>$ 1,916.6</td><td></td><td>(12)%</td></tr><tr><td>Real estate related depreciation, amortization and accretion</td><td>1,674.1</td><td>1,578.8</td><td></td><td>6</td></tr><tr><td>Losses from sale or disposal of real estate and real estate related impairment charges (1)</td><td>241.8</td><td>139.5</td><td></td><td>73</td></tr><tr><td>Dividend to noncontrolling interest</td><td>(7.9)</td><td>(13.2)</td><td></td><td>(40)</td></tr><tr><td>Adjustments for unconsolidated affiliates and noncontrolling interests</td><td>(88.7)</td><td>(130.0)</td><td></td><td>(32)</td></tr><tr><td>Nareit FFO attributable to American Tower Corporation common stockholders</td><td>$ 3,510.8</td><td>$ 3,491.7</td><td></td><td>1</td></tr><tr><td>Straight-line revenue</td><td>(322.0)</td><td>(183.5)</td><td></td><td>75</td></tr><tr><td>Straight-line expense</td><td>51.6</td><td>44.4</td><td></td><td>16</td></tr><tr><td>Stock-based compensation expense</td><td>120.8</td><td>111.4</td><td></td><td>8</td></tr><tr><td>Deferred portion of income tax (2)</td><td>(16.7)</td><td>(147.7)</td><td></td><td>(89)</td></tr><tr><td>Non-real estate related depreciation, amortization and accretion</td><td>208.2</td><td>199.6</td><td></td><td>4</td></tr><tr><td>Amortization of deferred financing costs, capitalized interest, debt discounts and premiums and long-term deferred interest charges</td><td>33.3</td><td>28.4</td><td></td><td>17</td></tr><tr><td>Payment of shareholder loan interest (3)</td><td>(63.3)</td><td>(14.2)</td><td></td><td>346</td></tr><tr><td>Other expense (income) (4)</td><td>240.8</td><td>(17.6)</td><td></td><td>(1,468)</td></tr><tr><td>Loss on retirement of long-term obligations</td><td>71.8</td><td>22.2</td><td></td><td>223</td></tr><tr><td>Other operating expenses (5)</td><td>24.0</td><td>26.8</td><td></td><td>(10)</td></tr><tr><td>Capital improvement capital expenditures</td><td>(150.3)</td><td>(160.0)</td><td></td><td>(6)</td></tr><tr><td>Corporate capital expenditures</td><td>(9.3)</td><td>(10.6)</td><td></td><td>(12)</td></tr><tr><td>Adjustments for unconsolidated affiliates and noncontrolling interests</td><td>88.7</td><td>130.0</td><td></td><td>(32)</td></tr><tr><td>Consolidated AFFO</td><td>$ 3,788.4</td><td>$ 3,520.9</td><td></td><td>8%</td></tr><tr><td>Adjustments for unconsolidated affiliates and noncontrolling interests (6)</td><td>(24.9)</td><td>(79.2)</td><td></td><td>(69)%</td></tr><tr><td>AFFO attributable to American Tower Corporation common stockholders</td><td>$ 3,763.5</td><td>$ 3,441.7</td><td></td><td>9%</td></tr></table>

(1) Included in these amounts are impairment charges of $222.8 million and $94.2 million for the years ended December 31, 2020 and 2019, respectively.

(2) For the year ended December 31, 2019, amount includes a tax benefit of $113.0 million as a result of revaluing our net deferred tax liability due to tax law changes in India.

(3) For the year ended December 31, 2020, relates to the payment of capitalized interest associated with the acquisition of MTN’s redeemable noncontrolling interests in each of our joint ventures in Ghana and Uganda (see note 15 to our consolidated financial statements included in this Annual Report). For the year ended December 31, 2019, relates to the payment of capitalized interest associated with the shareholder loan previously owed to our joint venture partner in Ghana. These long-term deferred interest payments were previously expensed but excluded from Consolidated AFFO.

(4) Includes losses (gains) on foreign currency exchange rate fluctuations of $216.4 million and ($6.1 million), respectively.

(5) Primarily includes acquisition-related costs and integration costs.

(6) Includes adjustments for the impact on both Nareit FFO attributable to American Tower Corporation common stockholders as well as the other line items included in the calculation of Consolidated AFFO.

## Year Ended December 31, 2020

The decrease in net income was primarily due to (i) an increase in other expense, attributable to an increase in net foreign currency losses, and a loss on retirement of long-term obligations of $71.8 million, attributable to the repayment of the 5.900% Notes, the 3.300% Notes and the 3.450% Notes, as compared to a loss on retirement of long-term obligations of $22.2 million during the year ended December 31, 2019, primarily attributable to the repayment of the 5.050% Notes, (ii) a change in the income tax provision (benefit), (iii) an increase in depreciation, amortization and accretion expense and (iv) an increase in other operating expenses, primarily attributable to an increase in impairment charges, partially offset by an increase in our operating profit.

The increase in Adjusted EBITDA was primarily attributable to the increase in our gross margin and was partially offset by an increase in SG&A, excluding the impact of stock-based compensation expense, of $39.1 million.

The increase in Consolidated AFFO and AFFO attributable to American Tower Corporation common stockholders was primarily attributable to the increase in our operating profit, excluding the impact of straight-line accounting and decreases in capital improvement and corporate capital expenditures, which were partially offset by an increase in cash paid for interest, including previously deferred interest associated with the shareholder loans. The growth in AFFO attributable to American



Tower Corporation common stockholders was also impacted by lower adjustments for unconsolidated affiliates and noncontrolling interests in Africa, which is now fully consolidated.



## Liquidity and Capital Resources

## Overview

During the year ended December 31, 2020, we increased our financial flexibility and our ability to grow our business while maintaining our long-term financial policies. Our significant 2020 financing transactions included:

- Entry into (i) a $750.0 million unsecured term loan due February 12, 2021 (the “2020 Term Loan”) and (ii) the April 2020 Term Loan (as defined below), which was repaid in full during the year ended December 31, 2020.

- Registered public offerings in an aggregate amount of $8.0 billion, including an aggregate amount of 1.4 billion EUR, of senior unsecured notes with maturities ranging from 2024 to 2051.

- Redemption of the 5.900% Notes, our 2.800% senior unsecured notes due 2020 (the “2.800% Notes”), the 3.300% Notes and the 3.450% Notes for an aggregate amount of $2.7 billion.

- Repayment of $350.0 million aggregate principal amount outstanding under the American Tower Secured Revenue Notes, Series 2015-1, Class A (the “Series 2015-1 Notes”).

- Establishment of an “at the market” stock offering program through which we may issue and sell shares of our common stock having an aggregate gross sales price of up to $1.0 billion (the “2020 ATM Program”).

The following table summarizes our liquidity as of December 31, 2020 (in millions):

<table><tr><td>Available under the 2019 Multicurrency Credit Facility</td><td>$ 3,100.0</td></tr><tr><td>Available under the 2019 Credit Facility</td><td>55.0</td></tr><tr><td>Letters of credit</td><td>(4.6)</td></tr><tr><td>Total available under credit facilities, net</td><td>3,150.4</td></tr><tr><td>Cash and cash equivalents</td><td>1,746.3</td></tr><tr><td>Total liquidity</td><td>$ 4,896.7</td></tr></table>

Subsequent to December 31, 2020, we made additional borrowings of (i) $50.0 million under our $2.9 billion senior unsecured revolving credit facility, as amended and restated in December 2019 and as further amended as described below (the “2019 Credit Facility”), and (ii) $1.8 billion under our $4.1 billion senior unsecured multicurrency revolving credit facility, as amended and restated in December 2019 and as further amended as described below (the “2019 Multicurrency Credit Facility”). The borrowings were used to repay existing indebtedness, including repayment of the InSite Debt and the 2020 Term Loan, and for general corporate purposes.

Summary cash flow information is set forth below for the years ended December 31, (in millions):

<table><tr><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>Net cash provided by (used for):</td><td></td><td></td><td></td></tr><tr><td>Operating activities</td><td>$ 3,881.4</td><td>$ 3,752.6</td><td>$ 3,748.3</td></tr><tr><td>Investing activities</td><td>(4,784.6)</td><td>(3,987.5)</td><td>(2,749.5)</td></tr><tr><td>Financing activities</td><td>1,215.3</td><td>521.7</td><td>(607.7)</td></tr><tr><td>Net effect of changes in foreign currency exchange rates on cash and cash equivalents, and restricted cash</td><td>(28.7)</td><td>(13.7)</td><td>(41.1)</td></tr><tr><td>Net increase in cash and cash equivalents, and restricted cash</td><td>$ 283.4</td><td>$ 273.1</td><td>$ 350.0</td></tr></table>

We use our cash flows to fund our operations and investments in our business, including tower maintenance and improvements, communications site construction, managed network installations and tower and land acquisitions. Additionally, we use our cash flows to make distributions, including distributions of our REIT taxable income to maintain our qualification for taxation as a REIT under the Code. We may also repay or repurchase our existing indebtedness or equity from time to time. We typically fund our international expansion efforts primarily through a combination of cash on hand, intercompany debt and equity contributions.

During the year ended December 31, 2020, we completed the acquisition of MTN’s noncontrolling interests in each of our joint ventures in Ghana and Uganda for total consideration of approximately $524.4 million (see note 15 to our consolidated financial statements included in this Annual Report), which resulted in an increase in our controlling interests in such joint ventures from 51% to 100%.

During the year ended December 31, 2020, we redeemed Tata Teleservices Limited and Tata Sons’ remaining combined holdings of ATC TIPL (see note 15 to our consolidated financial statements included in this Annual Report), for total consideration of INR 24.8 billion ($337.3 million at the date of redemption). As a result of the redemption, our controlling interest in ATC TIPL increased from 79% to 92% and the noncontrolling interest decreased from 21% to 8%.



In February 2021, we entered into an agreement with Macquarie SBI Infrastructure Investments Pte Limited and SBI Macquarie Infrastructure Trust, our remaining minority holders in ATC TIPL, to redeem 100% of their combined holdings in ATC TIPL (see note 15 to our consolidated financial statements included in this Annual Report) at a price of INR 175 per share, subject to certain adjustments. Accordingly, we expect to pay an amount equivalent to INR 12.9 billion (approximately $176.6 million) to redeem the shares in 2021, subject to regulatory approval. After the completion of the redemption, we will hold a 100% ownership interest in ATC TIPL.

As of December 31, 2020, we had total outstanding indebtedness of $29.5 billion, with a current portion of $0.8 billion. During the year ended December 31, 2020, we generated sufficient cash flow from operations, together with borrowings under our credit facilities and cash on hand, to fund our capital expenditures and debt service obligations, as well as our required distributions. We believe the cash generated by operating activities during the year ending December 31, 2021, together with our increased borrowing capacity under our credit facilities, recently executed delayed draw term loans and bridge loan commitment, will be sufficient to fund our required distributions, capital expenditures, debt service obligations (interest and principal repayments) and signed acquisitions. Our material current and long term cash requirements are further described below.

As of December 31, 2020, we had $1.5 billion of cash and cash equivalents held by our foreign subsidiaries, of which $570.5 million was held by our joint ventures. While certain subsidiaries may pay us interest or principal on intercompany debt, it has not been our practice to repatriate earnings from our foreign subsidiaries primarily due to our ongoing expansion efforts and related capital needs. However, in the event that we do repatriate any funds, we may be required to accrue and pay certain taxes.

## Cash Flows from Operating Activities

For the year ended December 31, 2020, cash provided by operating activities increased $128.8 million as compared to the year ended December 31, 2019. The primary factors that impacted cash provided by operating activities as compared to the year ended December 31, 2019, include:

• An increase in our operating profit of $431.4 million;

- An increase in non-cash operating activities, including an increase of approximately $138.5 million in straight-line revenue, partially offset by an increase of approximately $7.2 million in straight-line expense;

• An increase in cash required for working capital, primarily as a result of an increase in accounts receivable; and

• An increase of approximately $12.1 million in cash paid for interest.

For the year ended December 31, 2019, cash provided by operating activities increased $4.3 million as compared to the year ended December 31, 2018. The primary factors that impacted cash provided by operating activities as compared to the year ended December 31, 2018, include:

• An increase in non-cash operating activities, including an increase of approximately $95.9 million in straight-line revenue and a decrease of approximately $13.5 million in straight-line expense;

• An increase in our operating profit of $78.4 million; and

• A decrease of approximately $39.5 million in cash paid for interest.

## Cash Flows from Investing Activities

Our significant investing activities during the year ended December 31, 2020 are highlighted below:

• We spent approximately $3.8 billion for acquisitions, primarily related to the InSite Acquisition and asset acquisitions in the United States, Chile, France, Mexico, Peru, Poland and South Africa.

• We spent $1.1 billion for capital expenditures, as follows (in millions):

<table><tr><td>Discretionary capital projects (1)</td><td>$</td><td>402.4</td></tr><tr><td>Ground lease purchases (2)</td><td></td><td>194.6</td></tr><tr><td>Capital improvements and corporate expenditures (3)</td><td></td><td>159.6</td></tr><tr><td>Redevelopment</td><td></td><td>179.4</td></tr><tr><td>Start-up capital projects</td><td></td><td>135.2</td></tr><tr><td>Total capital expenditures (4)</td><td></td><td>1,071.2</td></tr></table>

(1) Includes the construction of 5,886 communications sites globally.

(2) Includes $36.9 million of perpetual land easement payments reported in Deferred financing costs and other financing activities in the cash flows from financing activities in our consolidated statements of cash flows.

(3) Includes $9.2 million of finance lease payments included in Repayments of notes payable, credit facilities, term loan, senior notes, secured debt, finance leases and capital leases in the cash flow from financing activities in our consolidated statements of cash flows.



(4) Net of purchase credits of $6.6 million on certain assets, which are reported in operating activities in our consolidated statements of cash flows.

Our significant investing transactions in 2019 included the following:

• We spent approximately $3.0 billion for acquisitions, primarily related to the Eaton Towers Acquisition, the Entel Acquisition and asset acquisitions in the United States, Colombia, Mexico, Paraguay and Peru.

• We spent $1,029.7 million for capital expenditures, as follows (in millions):

<table><tr><td>Discretionary capital projects (1)</td><td>$ 366.6</td></tr><tr><td>Ground lease purchases (2)</td><td>153.9</td></tr><tr><td>Capital improvements and corporate expenditures (3)</td><td>170.6</td></tr><tr><td>Redevelopment</td><td>258.5</td></tr><tr><td>Start-up capital projects</td><td>80.1</td></tr><tr><td>Total capital expenditures (4)</td><td>$ 1,029.7</td></tr></table>

(1) Includes the construction of 4,511 communications sites globally.

(2) Includes $29.6 million of perpetual land easement payments reported in Deferred financing costs and other financing activities in the cash flows from financing activities in our consolidated statements of cash flows.

(3) Includes $18.0 million of finance lease payments included in Repayments of notes payable, credit facilities, term loan, senior notes, secured debt, finance leases and capital leases in the cash flow from financing activities in our consolidated statements of cash flows.

(4) Net of purchase credits of $9.2 million on certain assets, which are reported in operating activities in our consolidated statements of cash flows.

We plan to continue to allocate our available capital, after satisfying our distribution requirements, among investment alternatives that meet our return on investment criteria, while maintaining our commitment to our long-term financial policies. Accordingly, we expect to continue to deploy capital through our annual capital expenditure program, including land purchases and new site construction, and through acquisitions. We also regularly review our tower portfolios as to capital expenditures required to upgrade our towers to our structural standards or address capacity, structural or permitting issues.

We expect that our 2021 total capital expenditures will be as follows (in millions):

<table><tr><td>Discretionary capital projects (1)</td><td>$ 475</td><td>to</td><td>$ 505</td></tr><tr><td>Ground lease purchases</td><td>230</td><td>to</td><td>250</td></tr><tr><td>Capital improvements and corporate expenditures</td><td>165</td><td>to</td><td>175</td></tr><tr><td>Redevelopment</td><td>290</td><td>to</td><td>310</td></tr><tr><td>Start-up capital projects</td><td>190</td><td>to</td><td>210</td></tr><tr><td>Total capital expenditures</td><td>$ 1,350</td><td>to</td><td>$ 1,450</td></tr></table>

(1) Includes the construction of approximately 6,000 to 7,000 communications sites globally.

## Cash Flows from Financing Activities

Our significant financing activities were as follows (in millions):

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td>2018</td><td></td></tr><tr><td>Proceeds from issuance of senior notes, net</td><td>$ 7,925.1</td><td>$ 4,876.7</td><td>$ 584.9</td><td></td></tr><tr><td>(Repayments of) proceeds from credit facilities, net</td><td>(5.1)</td><td>425.0</td><td>(695.9)</td><td></td></tr><tr><td>Distributions paid on common and preferred stock</td><td>(1,928.2)</td><td>(1,603.0)</td><td>(1,342.4)</td><td></td></tr><tr><td>Purchases of common stock</td><td>(56.0)</td><td>(19.6)</td><td>(232.8)</td><td></td></tr><tr><td>Repayments of securitized debt</td><td>(350.0)</td><td>—</td><td>(500.0)</td><td></td></tr><tr><td>Distributions to noncontrolling interest holders, net</td><td>(12.3)</td><td>(11.8)</td><td>(14.4)</td><td></td></tr><tr><td>Repayments of senior notes</td><td>(2,650.0)</td><td>(1,700.0)</td><td>—</td><td></td></tr><tr><td>(Repayments of) proceeds from term loans, net</td><td>(250.0)</td><td>(500.0)</td><td>1,500.0</td><td></td></tr><tr><td>Purchases of redeemable noncontrolling interests (1)</td><td>(861.7)</td><td>(425.7)</td><td>—</td><td></td></tr><tr><td>Proceeds from issuance of securities in securitization transaction</td><td>—</td><td>—</td><td>500.0</td><td></td></tr></table>

(1) Includes the redemption of minority interests in ATC TIPL. For the year ended December 31, 2020, also includes the redemption of MTN's noncontrolling interests in each of our joint ventures in Ghana and Uganda.



## Senior Notes

## Repayments of Senior Notes

Repayment of 5.900% Senior Notes—On January 15, 2020, we redeemed all of the $500.0 million aggregate principal amount of the 5.900% Notes at a price equal to 106.7090% of the principal amount, plus accrued and unpaid interest up to, but excluding January 15, 2020, for an aggregate redemption price of approximately $539.6 million, including $6.1 million in accrued and unpaid interest. We recorded a loss on retirement of long-term obligations of $34.6 million, which includes prepayment consideration of $33.5 million and the associated unamortized discount and deferred financing costs. The redemption was funded with borrowings under the 2019 Credit Facility and cash on hand. Upon completion of the redemption, none of the 5.900% Notes remained outstanding.

Repayment of 2.800% Senior Notes—On May 11, 2020, we redeemed all of the $750.0 million aggregate principal amount of the 2.800% Notes at a price equal to the principal amount, together with accrued interest up to, but excluding May 11, 2020, for an aggregate redemption price of approximately $759.3 million, including $9.3 million in accrued interest. The redemption was funded with borrowings under the 2019 Credit Facility and cash on hand. Upon completion of the redemption, none of the 2.800% Notes remained outstanding.

Repayment of 3.450% Senior Notes and 3.300% Senior Notes—On July 6, 2020, we redeemed all of the $650.0 million aggregate principal amount of the 3.450% Notes at a price equal to 103.5980% of the principal amount of the 3.450% Notes, plus accrued and unpaid interest up to, but excluding, July 6, 2020, for an aggregate redemption price of $680.3 million, including $6.9 million in accrued and unpaid interest. Also on July 6, 2020, we redeemed all of the $750.0 million aggregate principal amount of the 3.300% Notes at a price equal to 101.5090% of the principal amount of the 3.300% Notes, plus accrued and unpaid interest up to, but excluding, July 6, 2020, for an aggregate redemption price of $771.0 million, including $9.7 million in accrued and unpaid interest. We recorded a loss on retirement of long-term obligations of approximately $37.2 million, which includes prepayment consideration of $34.7 million and the associated unamortized discount and deferred financing costs. The redemptions were funded with borrowings under the 2019 Credit Facility and cash on hand. Upon completion of these redemptions, none of the 3.450% Notes or the 3.300% Notes remained outstanding.

## Offerings of Senior Notes

2.400% Senior Notes and 2.900% Senior Notes Offering—On January 10, 2020, we completed a registered public offering of $750.0 million aggregate principal amount of 2.400% senior unsecured notes due 2025 (the “2.400% Notes”) and $750.0 million aggregate principal amount of 2.900% senior unsecured notes due 2030 (the “2.900% Notes”). The net proceeds from this offering were approximately $1,483.4 million, after deducting commissions and estimated expenses. We used the net proceeds to repay existing indebtedness under the 2019 Credit Facility.

1.300% Senior Notes, 2.100% Senior Notes and 3.100% Senior Notes Offering—On June 3, 2020, we completed a registered public offering of $500.0 million aggregate principal amount of 1.300% senior unsecured notes due 2025 (the “1.300% Notes”), $750.0 million aggregate principal amount of 2.100% senior unsecured notes due 2030 (the “2.100% Notes”) and $750.0 million aggregate principal amount of 3.100% senior unsecured notes due 2050 (the “Initial 3.100% Notes”). The net proceeds from this offering were approximately $1,968.2 million, after deducting commissions and estimated expenses. We used the net proceeds to repay existing indebtedness under the 2019 Credit Facility and for general corporate purposes.

0.500% Senior Notes and 1.000% Senior Notes Offering—On September 10, 2020, we completed a registered public offering of 750.0 million EUR ($886.1 million at the date of issuance) aggregate principal amount of 0.500% senior unsecured notes due 2028 (the “0.500% Notes”) and 650.0 million EUR ($768.0 million at the date of issuance) aggregate principal amount of 1.000% senior unsecured notes due 2032 (the “1.000% Notes”). The net proceeds from this offering were approximately 1,385.2 million EUR ($1,636.6 million at the date of issuance), after deducting commissions and estimated expenses. We used the net proceeds to repay existing indebtedness under the 2019 Multicurrency Credit Facility and the April 2020 Term Loan (as defined below) and for general corporate purposes.

1.875% Senior Notes and 3.100% Senior Notes Offering—On September 28, 2020, we completed a registered public offering of $300.0 million aggregate principal amount through a reopening of the Initial 3.100% Notes (the “Reopened 3.100% Notes” and, collectively with the Initial 3.100% Notes, the “3.100% Notes”) and $800.0 million aggregate principal amount of 1.875% senior unsecured notes due 2030 (the “1.875% Notes”). The net proceeds from this offering were approximately $1,092.1 million, after deducting commissions and estimated expenses. We used the net proceeds to repay existing indebtedness under the 2019 Credit Facility and the April 2020 Term Loan (as defined below).

0.600% Senior Notes, 1.500% Senior Notes and 2.950% Senior Notes Offering—On November 20, 2020, we completed a registered public offering of $500.0 million aggregate principal amount of 0.600% senior unsecured notes due 2024 (the “0.600% Notes”), $650.0 million aggregate principal amount of 1.500% senior unsecured notes due 2028 (the “1.500% Notes”)



and $550.0 million aggregate principal amount of 2.950% senior unsecured notes due 2051 (the “2.950% Notes” and, collectively with the 2.400% Notes, the 2.900% Notes, the 1.300% Notes, the 2.100% Notes, the 3.100% Notes, the 0.500% Notes, the 1.000% Notes, the 1.875% Notes, the 0.600% Notes and the 1.500% Notes, the “Notes”). The net proceeds from this offering were approximately $1,678.9 million, after deducting commissions and estimated expenses. We used the net proceeds to repay existing indebtedness under the 2019 Credit Facility and for general corporate purposes, including the funding of the InSite Acquisition.

The key terms of the Notes are as follows:

<table><tr><td>Senior Notes</td><td>Aggregate Principal Amount (in millions)</td><td>Issue Date and Interest Accrual Date</td><td>Maturity Date</td><td>Contractual Interest Rate</td><td>First Interest Payment</td><td>Interest Payments Due (1)</td><td>Par Call Date (2)</td></tr><tr><td>2.400% Notes</td><td>$ 750.0</td><td>January 10, 2020</td><td>March 15, 2025</td><td>2.400%</td><td>September 15, 2020</td><td>March 15 and September 15</td><td>February 15, 2025</td></tr><tr><td>2.900% Notes</td><td>$ 750.0</td><td>January 10, 2020</td><td>January 15, 2030</td><td>2.900%</td><td>July 15, 2020</td><td>January 15 and July 15</td><td>October 15, 2029</td></tr><tr><td>1.300% Notes</td><td>$ 500.0</td><td>June 3, 2020</td><td>September 15, 2025</td><td>1.300%</td><td>March 15, 2021</td><td>March 15 and September 15</td><td>August 15, 2025</td></tr><tr><td>2.100% Notes</td><td>$ 750.0</td><td>June 3, 2020</td><td>June 15, 2030</td><td>2.100%</td><td>December 15, 2020</td><td>June 15 and December 15</td><td>March 15, 2030</td></tr><tr><td>3.100% Notes (3)</td><td>$ 1,050.0</td><td>June 3, 2020</td><td>June 15, 2050</td><td>3.100%</td><td>December 15, 2020</td><td>June 15 and December 15</td><td>December 15, 2049</td></tr><tr><td>0.500% Notes (4)</td><td>$ 886.1</td><td>September 10, 2020</td><td>January 15, 2028</td><td>0.500%</td><td>January 15, 2021</td><td>January 15</td><td>October 15, 2027</td></tr><tr><td>1.000% Notes (4)</td><td>$ 768.0</td><td>September 10, 2020</td><td>January 15, 2032</td><td>1.000%</td><td>January 15, 2021</td><td>January 15</td><td>October 15, 2031</td></tr><tr><td>1.875% Notes</td><td>$ 800.0</td><td>September 28, 2020</td><td>October 15, 2030</td><td>1.875%</td><td>April 15, 2021</td><td>April 15 and October 15</td><td>July 15, 2030</td></tr><tr><td>0.600% Notes</td><td>$ 500.0</td><td>November 20, 2020</td><td>January 15, 2024</td><td>0.600%</td><td>July 15, 2021</td><td>January 15 and July 15</td><td>N/A</td></tr><tr><td>1.500% Notes</td><td>$ 650.0</td><td>November 20, 2020</td><td>January 31, 2028</td><td>1.500%</td><td>July 31, 2021</td><td>January 31 and July 31</td><td>November 30, 2027</td></tr><tr><td>2.950% Notes</td><td>$ 550.0</td><td>November 20, 2020</td><td>January 15, 2051</td><td>2.950%</td><td>July 15, 2021</td><td>January 15 and July 15</td><td>July 15, 2050</td></tr></table>

(1) Accrued and unpaid interest on USD denominated notes is payable in USD semi-annually in arrears and will be computed from the issue date on the basis of a 360-day year comprised of twelve 30-day months. Interest on EUR denominated notes is payable in EUR annually in arrears and will be computed on the basis of the actual number of days in the period for which interest is being calculated and the actual number of days from and including the last date on which interest was paid on the notes, beginning on the issue date.

(2) We may redeem the Notes at any time, in whole or in part, at a redemption price equal to 100% of the principal amount of the Notes plus a make-whole premium, together with accrued interest to the redemption date. If we redeem the Notes on or after the par call date, we will not be required to pay a make-whole premium.

(3) The Initial 3.100% Notes were issued on June 3, 2020. The Reopened 3.100% Notes were issued on September 28, 2020.

(4) The 0.500% Notes and the 1.000% Notes are denominated in EUR. Represents the dollar equivalent of the aggregate principal amount as of the issue date.

If we undergo a change of control and corresponding ratings decline, each as defined in the applicable supplemental indenture, we may be required to repurchase all of the Notes at a purchase price equal to 101% of the principal amount of such Notes, plus accrued and unpaid interest (including additional interest, if any), up to but not including the repurchase date. The Notes rank equally with all of our other senior unsecured debt and are structurally subordinated to all existing and future indebtedness and other obligations of our subsidiaries.

The supplemental indentures contain certain covenants that restrict our ability to merge, consolidate or sell assets and our (together with our subsidiaries') ability to incur liens. These covenants are subject to a number of exceptions, including that we and our subsidiaries may incur certain liens on assets, mortgages or other liens securing indebtedness if the aggregate amount of indebtedness secured by such liens does not exceed 3.5x Adjusted EBITDA, as defined in the applicable supplemental indenture.

## Securitizations

Repayment of Series 2015-1 Notes—On the June 2020 payment date, we repaid the entire $350.0 million aggregate principal amount outstanding under the Series 2015-1 Notes pursuant to the terms of the agreements governing such securities. The repayment was funded with cash on hand. As of December 31, 2020, none of the Series 2015-1 Notes remained outstanding.



Repayment of InSite Debt—The InSite Debt includes securitizations entered into by certain InSite subsidiaries. The InSite Debt was recorded at fair value upon acquisition. On January 15, 2021, we repaid the entire amount outstanding under the InSite Debt, plus accrued and unpaid interest up to, but excluding, January 15, 2021, for an aggregate redemption price of $826.4 million, including $2.3 million in accrued and unpaid interest. We recorded a loss on retirement of long-term obligations of approximately $24.5 million, which consists of prepayment consideration offset by the unamortized fair value adjustment recorded upon acquisition. The repayment of the InSite Debt was funded with borrowings from the 2019 Multicurrency Credit Facility and the 2019 Credit Facility, and cash on hand.

## Bank Facilities

During the year ended December 31, 2020, we increased the commitments under the 2019 Multicurrency Credit Facility and the 2019 Credit Facility by $100.0 million each to $3.1 billion and $2.35 billion, respectively.

2019 Multicurrency Credit Facility—As of December 31, 2020, we had the ability to borrow up to $3.1 billion under the 2019 Multicurrency Credit Facility, which includes a $1.0 billion sublimit for multicurrency borrowings, a $200.0 million sublimit for letters of credit and a $50.0 million sublimit for swingline loans. During the year ended December 31, 2020, we borrowed an aggregate of $1.0 billion and repaid an aggregate of $1.8 billion of revolving indebtedness under the 2019 Multicurrency Credit Facility. We used the borrowings to repay existing indebtedness and for general corporate purposes.

2019 Credit Facility—As of December 31, 2020, we had the ability to borrow up to $2.35 billion under the 2019 Credit Facility, which includes a $200.0 million sublimit for letters of credit and a $50.0 million sublimit for swingline loans. During the year ended December 31, 2020, we borrowed an aggregate of $7.2 billion and repaid an aggregate of $6.5 billion of revolving indebtedness under the 2019 Credit Facility. We used the borrowings to fund acquisitions, including the InSite Acquisition, to repay existing indebtedness and for general corporate purposes.

2020 Term Loan—On February 13, 2020, we entered into the 2020 Term Loan, the net proceeds of which were used, together with borrowings under the 2019 Credit Facility and cash on hand, to repay all outstanding indebtedness under our $1.3 billion unsecured term loan entered into on February 14, 2019. The 2020 Term Loan matured on February 12, 2021 and had an interest rate that was 0.650% above the London Interbank Offered Rate (“LIBOR”) for LIBOR-based borrowings or 0.000% above the defined base rate for base rate borrowings. On February 5, 2021, we repaid all amounts outstanding under the 2020 Term Loan with borrowings from the 2019 Multicurrency Credit Facility and cash on hand.

April 2020 Term Loan—On April 3, 2020, we entered into a $1.14 billion unsecured term loan due April 2, 2021, which was subsequently increased to $1.19 billion effective April 21, 2020 (the “April 2020 Term Loan”), the net proceeds of which were used to repay outstanding indebtedness under the 2019 Credit Facility. During the year ended December 31, 2020, we repaid all amounts outstanding under the April 2020 Term Loan with proceeds from the issuances of the 0.500% Notes, the 1.000% Notes, the 1.875% Notes and the Reopened 3.100% Notes.

As of December 31, 2020, the key terms under the 2019 Multicurrency Credit Facility, the 2019 Credit Facility, our $1.0 billion unsecured term loan, as amended and restated in December 2019 (the “2019 Term Loan”), and the 2020 Term Loan were as follows:

<table><tr><td>Bank Facility (1)</td><td>Outstanding Balance</td><td>Maturity Date</td><td>LIBOR borrowing interest rate range (2)</td><td>Base rate borrowing interest rate range (2)</td><td>Current margin over LIBOR and the base rate, respectively</td></tr><tr><td>2019 Multicurrency Credit Facility</td><td>—</td><td>June 28, 2023</td><td>(3) 0.875% - 1.750%</td><td>0.000% - 0.750%</td><td>1.125% and 0.125%</td></tr><tr><td>2019 Credit Facility</td><td>$ 2,295.0</td><td>January 31, 2025</td><td>(3) 0.875% - 1.750%</td><td>0.000% - 0.750%</td><td>1.125% and 0.125%</td></tr><tr><td>2019 Term Loan</td><td>$ 1,000.0</td><td>January 31, 2025</td><td>0.875% - 1.750%</td><td>0.000% - 0.750%</td><td>1.125% and 0.125%</td></tr><tr><td>2020 Term Loan</td><td>$ 750.0</td><td>February 12, 2021</td><td>0.650%</td><td>0.000%</td><td>0.650% and 0.000%</td></tr></table>

(1) Currently borrowed at LIBOR.

(2) Represents interest rate above LIBOR for LIBOR-based borrowings and the interest rate above the defined base rate for base rate borrowings, in each case based on our debt ratings.

(3) Subject to two optional renewal periods.

We must pay a quarterly commitment fee on the undrawn portion of each of the 2019 Multicurrency Credit Facility and the 2019 Credit Facility. The commitment fee for the 2019 Multicurrency Credit Facility and the 2019 Credit Facility ranges from 0.080% to 0.300% per annum, based upon our debt ratings, and is currently 0.110%.

The 2019 Multicurrency Credit Facility, the 2019 Credit Facility and the 2019 Term Loan do not require amortization of principal and may be paid prior to maturity in whole or in part at our option without penalty or premium. We have the option of choosing either a defined base rate or LIBOR as the applicable base rate for borrowings under these bank facilities.



The loan agreements for each of the 2019 Multicurrency Credit Facility, the 2019 Credit Facility and the 2019 Term Loan contain certain reporting, information, financial and operating covenants and other restrictions (including limitations on additional debt, guaranties, sales of assets and liens) with which we must comply. Failure to comply with the financial and operating covenants of the loan agreements could not only prevent us from being able to borrow additional funds under the revolving credit facilities, but may constitute a default, which could result in, among other things, the amounts outstanding, including all accrued interest and unpaid fees, becoming immediately due and payable.

Amendments to Bank Facilities—On February 10, 2021, we amended and restated the 2019 Multicurrency Credit Facility and the 2019 Credit Facility and entered into an amendment agreement with respect to the 2019 Term Loan.

These amendments, among other things,

i. extend the maturity dates by one year to June 28, 2024 and January 31, 2026 for the 2019 Multicurrency Credit Facility and the 2019 Credit Facility, respectively,

ii. increase the commitments under the 2019 Multicurrency Credit Facility and the 2019 Credit Facility to $4.1 billion and $2.9 billion, respectively, of which 1.3 billion EUR borrowed under the 2019 Multicurrency Credit Facility is to be reserved to finance the Pending Telxius Acquisition,

iii. increase the maximum Revolving Loan Commitments, after giving effect to any Incremental Commitments (each as defined in the loan agreements for each of the 2019 Multicurrency Credit Facility and the 2019 Credit Facility) to $6.1 billion and $4.4 billion under the 2019 Multicurrency Credit Facility and the 2019 Credit Facility, respectively,

iv. expand the sublimit for multicurrency borrowings under the 2019 Multicurrency Credit Facility from $1.0 billion to $3.0 billion and add a EUR borrowing option for the 2019 Credit Facility with a $1.5 billion sublimit,

v. amend the limitation of our permitted ratio of Total Debt to Adjusted EBITDA (each as defined in each of the loan agreements for each of the facilities) to be no greater than 7.50 to 1.00 for the four fiscal quarters following the consummation of the Pending Telxius Acquisition, stepping down to 6.00 to 1.00 thereafter (with a further step up to 7.00 to 1.00 if we consummate a Qualified Acquisition (as defined in each of the loan agreements for the facilities)),

vi. amend the limitation on indebtedness of, and guaranteed by, our subsidiaries to the greater of (a) $3.0 billion and (b) 50% of Adjusted EBITDA (as defined in each of the loan agreements for the facilities) of us and our subsidiaries on a consolidated basis and

vii. increase the threshold for certain defaults with respect to judgments, attachments or acceleration of indebtedness from $400.0 million to $500.0 million.

2021 Delayed Draw Term Loans—On February 10, 2021, we entered into (i) a 1.1 billion EUR (approximately $1.3 billion at the date of signing) unsecured term loan, the proceeds of which are to be used to fund the Pending Telxius Acquisition, with a maturity date that is 364 days from the date of the first draw thereunder and bears interest at a rate based on our senior unsecured debt rating, which, based on our current debt ratings, is 1.000% above the Euro Interbank Offered Rate (“EURIBOR”) (the “2021 364-Day Delayed Draw Term Loan”) and (ii) an 825.0 million EUR (approximately $1.0 billion at the date of signing) unsecured term loan, the proceeds of which are to be used to fund the Pending Telxius Acquisition, with a maturity date that is three years from the date of the first draw thereunder and bears interest at a rate based on our senior unsecured debt rating, which, based on our current debt ratings, is 1.125% above EURIBOR (the “2021 Three Year Delayed Draw Term Loan,” and, together with the 2021 364-Day Delayed Draw Term Loan, the “2021 Delayed Draw Term Loans”).

The loan agreements for the 2021 Delayed Draw Term Loans contain certain reporting, information, financial and operating covenants and other restrictions (including limitations on additional debt, guaranties, sales of assets and liens) with which we must comply. Failure to comply with the financial and operating covenants of the loan agreements could not only prevent us from being able to borrow additional funds under the revolving credit facilities, but may constitute a default, which could result in, among other things, the amounts outstanding, including all accrued interest and unpaid fees, becoming immediately due and payable.

Bridge Facility—In connection with entering into the Pending Telxius Acquisition, we entered into a commitment letter (the "Commitment Letter"), dated January 13, 2021, with Bank of America, N.A. and BofA Securities, Inc. (together, "BoA") pursuant to which BoA has committed to provide up to 7.5 billion EUR (approximately $9.1 billion at date of signing) in bridge loans (the "Bridge Loan Commitment") to ensure financing for the Pending Telxius Acquisition. Effective February 10, 2021, the Bridge Loan Commitment was reduced to 4.275 billion EUR (approximately $5.2 billion at the date of signing) as a result of an aggregate of 3.225 billion EUR (approximately $3.9 billion at the date of signing) of additional committed amounts under the 2019 Multicurrency Credit Facility, the 2019 Credit Facility and the 2021 Delayed Draw Term Loans, as described above.



The Commitment Letter contains, and the credit agreement in respect of the Bridge Loan Commitment, if any, will contain, certain customary conditions to funding, including, without limitation, (i) the execution and delivery of definitive financing agreements for the Bridge Loan Commitment and (ii) other customary closing conditions set forth in the Commitment Letter. The Company will pay certain customary commitment fees and, in the event it makes any borrowings in connection with the Bridge Loan Commitment, funding and other fees.

India Indebtedness—We maintain several working capital facilities in India, most of which are subject to annual renewal. The working capital facilities bear interest at rates that consist of the applicable bank’s Marginal Cost of Funds based Lending Rate (as defined in the applicable agreement), plus a spread.

Generally, the working capital facilities are payable on demand prior to maturity. Amounts outstanding and key terms of the India indebtedness consisted of the following as of December 31, 2020 (in millions, except percentages):

<table><tr><td></td><td>Amount Outstanding (INR)</td><td>Amount Outstanding (USD)</td><td>Interest Rate (Range)</td><td>Maturity Date (Range)</td></tr><tr><td>Working capital facilities (1)</td><td>—</td><td>—</td><td>7.45% - 8.75%</td><td>March 18, 2021 - October 23, 2021</td></tr></table>

(1) 5.6 billion INR ($76.9 million) of borrowing capacity as of December 31, 2020.

Subsequent to December 31, 2020, we entered into two additional working capital facilities in India, under which we currently have no amounts outstanding.

Stock Repurchase Programs—In March 2011, our Board of Directors approved a stock repurchase program, pursuant to which we are authorized to repurchase up to $1.5 billion of our common stock (the “2011 Buyback”). In addition to the 2011 Buyback, in December 2017, our Board of Directors approved an additional stock repurchase program, pursuant to which we are authorized to repurchase up to $2.0 billion of our common stock (the “2017 Buyback,” and, together with the 2011 Buyback, the “Buyback Programs”).

During the year ended December 31, 2020, we repurchased 264,086 shares of our common stock under the 2011 Buyback for an aggregate of $56.0 million, including commissions and fees. We had no repurchases under the 2017 Buyback.

Under each program, we are authorized to purchase shares from time to time through open market purchases or in privately negotiated transactions not to exceed market prices and subject to market conditions and other factors. With respect to open market purchases, we may use plans adopted in accordance with Rule 10b5-1 under the Exchange Act in accordance with securities laws and other legal requirements, which allows us to repurchase shares during periods when we may otherwise be prevented from doing so under insider trading laws or because of self-imposed trading blackout periods. These programs may be discontinued at any time.

We have repurchased a total of 14.4 million shares of our common stock under the 2011 Buyback for an aggregate of $1.5 billion, including commissions and fees. We expect to continue managing the pacing of the remaining approximately $2.0 billion under the Buyback Programs in response to general market conditions and other relevant factors. We expect to fund any further repurchases of our common stock through a combination of cash on hand, cash generated by operations and borrowings under our credit facilities. Repurchases under the Buyback Programs are subject to, among other things, us having available cash to fund the repurchases.

Sales of Equity Securities—We receive proceeds from sales of our equity securities pursuant to our employee stock purchase plan (the “ESPP”) and upon exercise of stock options granted under our equity incentive plan. For the year ended December 31, 2020, we received an aggregate of $98.1 million in proceeds upon exercises of stock options and sales pursuant to the ESPP.

2020 “At the Market” Stock Offering Program—In August 2020, we established the 2020 ATM Program. Sales under the 2020 ATM Program may be made by means of ordinary brokers’ transactions on the New York Stock Exchange or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or, subject to our specific instructions, at negotiated prices. We intend to use the net proceeds of the 2020 ATM Program for general corporate purposes, which may include, among other things, the funding of acquisitions, additions to working capital and repayment or refinancing of existing indebtedness. As of December 31, 2020, we have not sold any shares of common stock under the 2020 ATM Program.

Distributions—As a REIT, we must annually distribute to our stockholders an amount equal to at least 90% of our REIT taxable income (determined before the deduction for distributed earnings and excluding any net capital gain). Generally, we have distributed, and expect to continue to distribute, all or substantially all of our REIT taxable income after taking into consideration our utilization of NOLs. We have distributed an aggregate of approximately $9.4 billion to our common



stockholders, including the dividend paid in February 2021, primarily classified as ordinary income that may be treated as qualified REIT dividends under Section 199A of the Code for taxable years ending before 2026.

The amount, timing and frequency of future distributions will be at the sole discretion of our Board of Directors and will depend on various factors, a number of which may be beyond our control, including our financial condition and operating cash flows, the amount required to maintain our qualification for taxation as a REIT and reduce any income and excise taxes that we otherwise would be required to pay, limitations on distributions in our existing and future debt and preferred equity instruments, our ability to utilize NOLs to offset our distribution requirements, limitations on our ability to fund distributions using cash generated through our TRSs and other factors that our Board of Directors may deem relevant.

During the year ended December 31, 2020, we paid $4.33 per share, or $1.9 billion, to common stockholders of record. In addition, we declared a distribution of $1.21 per share, or $537.6 million, paid on February 2, 2021 to our common stockholders of record at the close of business on December 28, 2020.

We accrue distributions on unvested restricted stock units, which are payable upon vesting. The amount accrued for distributions payable related to unvested restricted stock units was $12.6 million and $14.3 million as of December 31, 2020 and 2019, respectively. During the year ended December 31, 2020, we paid $7.8 million of distributions upon the vesting of restricted stock units.

For more details on the cash distributions paid to our common stockholders during the year ended December 31, 2020, see note 16 to our consolidated financial statements included in this Annual Report.

Material Cash Requirements—The following table summarizes material cash requirements from known contractual and other obligations as of December 31, 2020 (in millions):

<table><tr><td></td><td>2021</td><td>2022</td><td>2023</td><td>2024</td><td>2025</td><td>Thereafter</td><td>Total</td></tr><tr><td>Debt obligations (1)</td><td>$ 789.8</td><td>$ 1,304.6</td><td>$ 3,318.9</td><td>$ 2,151.9</td><td>$ 7,566.0</td><td>$ 14,331.5</td><td>$ 29,462.7</td></tr><tr><td>Operating lease obligations (2)</td><td>901.1</td><td>869.0</td><td>836.4</td><td>798.0</td><td>751.8</td><td>6,423.4</td><td>10,579.7</td></tr></table>



(1) Includes aggregate principal maturities of long-term debt, including finance lease obligations (see note 9 to our consolidated financial statements included in this Annual Report).

(2) Includes payments under non-cancellable initial terms, as well as payments for certain renewal periods at our option, which we expect to renew because failure to do so could result in a loss of the applicable communications sites and related revenues from tenant leases (see note 4 to our consolidated financial statements included in this Annual Report).

Distributions—We expect that our 2021 total distributions paid to our common stockholders will be $2.3 billion. The amount, timing and frequency of future distributions will be at the sole discretion of our Board of Directors.

Signed Acquisitions—On November 28, 2019, we entered into definitive agreements with Orange for the acquisition of up to approximately 2,000 communications sites in France over a period of up to five years for total consideration in the range of approximately 500.0 million EUR to 600.0 million EUR (approximately $550.5 million to $660.5 million at the date of signing) to be paid over the five-year term. During the year ended December 31, 2020, we completed the acquisition of 564 communications sites. The remaining communications sites are expected to close in tranches, subject to customary closing conditions.

On December 19, 2019, we entered into a definitive agreement to acquire approximately 3,200 communications sites in Chile and Peru from Entel PCS Telecomunicaciones S.A. and Entel Peru S.A. for total consideration of approximately $0.8 billion (as of the date of signing). We completed the acquisition of approximately 2,400 communications sites in December 2019. During the year ended December 31, 2020, we completed the acquisition of an additional 530 communications sites pursuant to this agreement for an aggregate total purchase price of $137.7 million (as of the dates of acquisition), including value added tax. The remaining communications sites are expected to continue to close in tranches, subject to certain closing conditions.

On January 13, 2021, we entered into the Pending Telxius Acquisition for approximately 7.7 billion EUR (approximately $9.4 billion at the date of signing), subject to limited adjustments. The Pending Telxius Acquisition is expected to close in tranches beginning in the second quarter of 2021, subject to customary closing conditions, including government and regulatory approval.

Asset Retirement Obligations—We are required to remove our tower assets and remediate the leased land upon which certain of our tower assets are located. As of December 31, 2020, the estimated undiscounted future cash outlay for asset retirement obligations was $3.7 billion.

Purchase of Redeemable Noncontrolling Interests— As described above, we expect to pay an amount equivalent to INR 12.9 billion (approximately $176.6 million) to redeem the shares of our remaining minority holders in ATC TIPL in 2021, subject to regulatory approval.

## Factors Affecting Sources of Liquidity

Our liquidity depends on our ability to generate cash flow from operating activities, borrow funds under our credit facilities and maintain compliance with the contractual agreements governing our indebtedness. We believe that the debt agreements discussed below represent our material debt agreements that contain covenants, our compliance with which would be material to an investor’s understanding of our financial results and the impact of those results on our liquidity.

Internally Generated Funds—Because the majority of our tenant leases are multiyear contracts, a significant majority of the revenues generated by our property operations as of the end of 2020 is recurring revenue that we should continue to receive in future periods. Accordingly, a key factor affecting our ability to generate cash flow from operating activities is to maintain this recurring revenue and to convert it into operating profit by minimizing operating costs and fully achieving our operating efficiencies. In addition, our ability to increase cash flow from operating activities depends upon the demand for our communications sites and our related services and our ability to increase the utilization of our existing communications sites.

Restrictions Under Loan Agreements Relating to Our Credit Facilities—The loan agreements for the 2019 Multicurrency Credit Facility, the 2019 Credit Facility, the 2019 Term Loan and the 2021 Delayed Draw Term Loans contain certain financial and operating covenants and other restrictions applicable to us and our subsidiaries that are not designated as unrestricted subsidiaries on a consolidated basis. These restrictions include limitations on additional debt, distributions and dividends, guaranties, sales of assets and liens. The loan agreements also contain covenants that establish financial tests with which we and our restricted subsidiaries must comply related to total leverage and senior secured leverage, as set forth in the table below. As



of December 31, 2020, we were in compliance with each of these covenants.

<table><tr><td rowspan="2"></td><td colspan="3">Compliance Tests For The 12 Months Ended December 31, 2020 ($ in billions)</td></tr><tr><td>Ratio (1)</td><td>Additional Debt Capacity Under Covenants (2)</td><td>Capacity for Adjusted EBITDA Decrease Under Covenants (3)</td></tr><tr><td>Consolidated Total Leverage Ratio</td><td>Total Debt to Adjusted EBITDA ≤ 6.00:1.00</td><td>~$2.5</td><td>~$0.4</td></tr><tr><td>Consolidated Senior Secured Leverage Ratio</td><td>Senior Secured Debt to Adjusted EBITDA ≤ 3.00:1.00</td><td>~$12.6 (4)</td><td>~$4.2</td></tr></table>

(1) Each component of the ratio as defined in the applicable loan agreement.

(2) Assumes no change to Adjusted EBITDA.

(3) Assumes no change to our debt levels.

(4) Effectively, however, additional Senior Secured Debt under this ratio would be limited to the capacity under the Consolidated Total Leverage Ratio.

Under the terms of the agreements for the 2019 Multicurrency Credit Facility, the 2019 Credit Facility, the 2019 Term Loan and the 2021 Delayed Draw Term Loans, the Pending Telxius Acquisition is designated as a Qualified Acquisition, whereby our Total Debt to Adjusted EBITDA ratio is adjusted to not exceed 7:50 to 1:00 for four fiscal quarters following consummation of the Pending Telxius Acquisition. The loan agreements for our credit facilities also contain reporting and information covenants that require us to provide financial and operating information to the lenders within certain time periods. If we are unable to provide the required information on a timely basis, we would be in breach of these covenants.

Failure to comply with the financial maintenance tests and certain other covenants of the loan agreements for our credit facilities could not only prevent us from being able to borrow additional funds under these credit facilities, but may also constitute a default under these credit facilities, which could result in, among other things, the amounts outstanding, including all accrued interest and unpaid fees, becoming immediately due and payable. If this were to occur, we may not have sufficient cash on hand to repay such indebtedness. The key factors affecting our ability to comply with the debt covenants described above are our financial performance relative to the financial maintenance tests defined in the loan agreements for these credit facilities and our ability to fund our debt service obligations. Based upon our current expectations, we believe our operating results during the next 12 months will be sufficient to comply with these covenants.

Restrictions Under Agreements Relating to the 2015 Securitization and the Trust Securitizations—The indenture and related supplemental indenture governing the American Tower Secured Revenue Notes, Series 2015-2, Class A (the “Series 2015-2 Notes”) issued by GTP Acquisition Partners I, LLC (“GTP Acquisition Partners”) in a private securitization transaction in May 2015 (the “2015 Securitization”) and the loan agreement related to the securitization transactions completed in March 2013 (the “2013 Securitization”) and March 2018 (the “2018 Securitization” and, together with the 2013 Securitization, the “Trust Securitizations”) include certain financial ratios and operating covenants and other restrictions customary for transactions subject to rated securitizations. Among other things, GTP Acquisition Partners and American Tower Asset Sub, LLC and American Tower Asset Sub II, LLC (together, the “AMT Asset Subs”) are prohibited from incurring other indebtedness for borrowed money or further encumbering their assets, subject to customary carve-outs for ordinary course trade payables and permitted encumbrances (as defined in the applicable agreements).

Under the agreements, amounts due will be paid from the cash flows generated by the assets securing the Series 2015-2 Notes or the assets securing the nonrecourse loan that secures the Secured Tower Revenue Securities, Series 2013-2A (the "Series 2013-2A Securities"), Secured Tower Revenue Securities, Series 2018-1, Subclass A (the "Series 2018-1A Securities"), and the Secured Tower Revenue Securities, Series 2018-1, Subclass R (the "Series 2018-1R Securities" and, together with the Series 2018-1A Securities, the "2018 Securities") issued in the Trust Securitizations (the "Loan"), as applicable, which must be deposited into certain reserve accounts, and thereafter distributed, solely pursuant to the terms of the applicable agreement. On a monthly basis, after payment of all required amounts under the applicable agreement, subject to the conditions described in the table below, the excess cash flows generated from the operation of such assets are released to GTP Acquisition Partners or the AMT Asset Subs, as applicable, which can then be distributed to, and used by, us. As of December 31, 2020, $81.0 million held in such reserve accounts was classified as restricted cash.

Certain information with respect to the 2015 Securitization and the Trust Securitizations is set forth below. The debt service coverage ratio (“DSCR”) is generally calculated as the ratio of the net cash flow (as defined in the applicable agreement) to the amount of interest, servicing fees and trustee fees required to be paid over the succeeding 12 months on the principal amount of the Series 2015-2 Notes or the Loan, as applicable, that will be outstanding on the payment date following such date of determination.



<table><tr><td rowspan="2"></td><td rowspan="2">Issuer or Borrower</td><td rowspan="2">Notes/Securities Issued</td><td rowspan="2">Cash Trap DSCR</td><td rowspan="2">Amortization Period</td><td rowspan="2">Excess Cash Distributed During Year Ended December 31, 2020</td><td rowspan="2">DSCR as of December 31, 2020</td><td rowspan="2">Capacity for Decrease in Net Cash Flow Before Triggering Cash Trap DSCR (1)</td><td rowspan="2">Capacity for Decrease in Net Cash Flow Before Triggering Minimum DSCR (1)</td></tr><tr></tr><tr><td>2015 Securitization (2)</td><td>GTP Acquisition Partners</td><td>American Tower Secured Revenue Notes, Series 2015-1 and Series 2015-2</td><td>1.30x, Tested Quarterly (3)</td><td>(4)(5)</td><td>$269.3</td><td>16.00x</td><td>$270.5</td><td>$273.3</td></tr><tr><td>Trust Securitizations</td><td>AMT Asset Subs</td><td>Secured Tower Revenue Securities, Series 2013-2A, Secured Tower Revenue Securities, Series 2018-1, Subclass A and Secured Tower Revenue Securities, Series 2018-1, Subclass R</td><td>1.30x, Tested Quarterly (3)</td><td>(4)(6)</td><td>$448.8</td><td>11.31x</td><td>$597.9</td><td>$606.9</td></tr></table>

(1) Based on the net cash flow of the applicable issuer or borrower as of December 31, 2020 and the expenses payable over the next 12 months on the Series 2015-2 Notes or the Loan, as applicable.

(2) On the June 2020 payment date, the Series 2015-1 Notes were repaid in full. As of December 31, 2020, none of the Series 2015-1 Notes remained outstanding.

(3) Once triggered, a Cash Trap DSCR condition continues to exist until the DSCR exceeds the Cash Trap DSCR for two consecutive calendar quarters. During a Cash Trap DSCR condition, all cash flow in excess of amounts required to make debt service payments, fund required reserves, pay management fees and budgeted operating expenses and make other payments required under the applicable transaction documents, referred to as excess cash flow, will be deposited into a reserve account (the "Cash Trap Reserve Account") instead of being released to the applicable issuer or borrower.

(4) An amortization period commences if the DSCR is equal to or below 1.15x (the “Minimum DSCR”) at the end of any calendar quarter and continues to exist until the DSCR exceeds the Minimum DSCR for two consecutive calendar quarters.

(5) No amortization period is triggered if the outstanding principal amount of a series has not been repaid in full on the applicable anticipated repayment date. However, in such event, additional interest will accrue on the unpaid principal balance of the applicable series, and such series will begin to amortize on a monthly basis from excess cash flow.

(6) An amortization period exists if the outstanding principal amount has not been paid in full on the applicable anticipated repayment date and continues to exist until such principal has been repaid in full.

A failure to meet the noted DSCR tests could prevent GTP Acquisition Partners or the AMT Asset Subs from distributing excess cash flow to us, which could affect our ability to fund our capital expenditures, including tower construction and acquisitions and to meet REIT distribution requirements. During an “amortization period,” all excess cash flow and any amounts then in the applicable Cash Trap Reserve Account would be applied to pay principal of the Series 2015-2 Notes or the Loan, as applicable, on each monthly payment date, and so would not be available for distribution to us. Further, additional interest will begin to accrue with respect to the Series 2015-2 Notes or subclass of the Loan from and after the anticipated repayment date at a per annum rate determined in accordance with the applicable agreement. With respect to the Series 2015-2 Notes, upon the occurrence of, and during, an event of default, the applicable trustee may, in its discretion or at the direction of holders of more than 50% of the aggregate outstanding principal of the Series 2015-2 Notes, declare the Series 2015-2 Notes immediately due and payable, in which case any excess cash flow would need to be used to pay holders of such notes. Furthermore, if GTP Acquisition Partners or the AMT Asset Subs were to default on the Series 2015-2 Notes or the Loan, the applicable trustee may seek to foreclose upon or otherwise convert the ownership of all or any portion of the 3,538 communications sites that secure the Series 2015-2 Notes or the 5,114 broadcast and wireless communications towers and related assets that secure the Loan, respectively, in which case we could lose such sites and the revenue associated with those assets.

As discussed above, we use our available liquidity and seek new sources of liquidity to fund capital expenditures, future growth and expansion initiatives, satisfy our distribution requirements and repay or repurchase our debt. If we determine that it is desirable or necessary to raise additional capital, we may be unable to do so, or such additional financing may be prohibitively expensive or restricted by the terms of our outstanding indebtedness. Additionally, as further discussed under Item 1A of this Annual Report under the caption “Risk Factors,” extreme market volatility and disruption caused by the COVID-19 pandemic



may impact our ability to raise additional capital through debt financing activities or our ability to repay or refinance maturing liabilities, or impact the terms of any new obligations. If we are unable to raise capital when our needs arise, we may not be able to fund capital expenditures, future growth and expansion initiatives, satisfy our REIT distribution requirements and debt service obligations or refinance our existing indebtedness.

In addition, our liquidity depends on our ability to generate cash flow from operating activities. As set forth under Item 1A of this Annual Report under the caption “Risk Factors,” we derive a substantial portion of our revenues from a small number of tenants and, consequently, a failure by a significant tenant to perform its contractual obligations to us could adversely affect our cash flow and liquidity.

## Critical Accounting Policies and Estimates

Management’s discussion and analysis of financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, as well as related disclosures of contingent assets and liabilities. We evaluate our policies and estimates on an ongoing basis. Management bases its estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying amounts of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

We have reviewed our policies and estimates to determine our critical accounting policies for the year ended December 31, 2020. We have identified the following policies as critical to an understanding of our results of operations and financial condition. This is not a comprehensive list of our accounting policies. See note 1 to our consolidated financial statements included in this Annual Report for a summary of our significant accounting policies. In many cases, the accounting treatment of a particular transaction is specifically dictated by GAAP, with no need for management’s judgment in its application. There are also areas in which management’s judgment in selecting any available alternative would not produce a materially different result.

• Impairment of Assets—Assets Subject to Depreciation and Amortization: We review long-lived assets for impairment at least annually or whenever events, changes in circumstances or other indicators or evidence indicate that the carrying amount of our assets may not be recoverable.

We review our tower portfolio, network location intangible and right-of-use assets for indicators of impairment at the lowest level of identifiable cash flows, typically at an individual tower basis. Possible indicators include a tower not having current tenant leases or having expenses in excess of revenues. A cash flow modeling approach is utilized to assess recoverability and incorporates, among other items, the tower location, the tower location demographics, the timing of additions of new tenants, lease rates and estimated length of tenancy and ongoing cash requirements.

We review our tenant-related intangible assets on a tenant by tenant basis for indicators of impairment, such as high levels of turnover or attrition, non-renewal of a significant number of contracts or the cancellation or termination of a relationship. We assess recoverability by determining whether the carrying amount of the tenant-related intangible assets will be recovered primarily through projected undiscounted future cash flows.

If the sum of the estimated undiscounted future cash flows of our long-lived assets is less than the carrying amount of the assets, an impairment loss may be recognized. Key assumptions included in the undiscounted cash flows are future revenue projections, estimates of ongoing tenancies and operating margins. An impairment loss would be based on the fair value of the asset, which is based on an estimate of discounted future cash flows to be provided from the asset. We record any related impairment charge in the period in which we identify such impairment.

In October 2019, the Supreme Court of India issued a ruling regarding the definition of AGR and associated fees and charges, which was reaffirmed in March 2020, that may have a material financial impact on certain of our tenants which could affect their ability to perform their obligations under agreements with us. In September 2020, the Supreme Court of India defined the expected timeline of ten years for payments owed under the ruling. We will continue to monitor the status of these developments, as it is possible that the estimated future cash flows may differ from current estimates and changes in estimated cash flows from tenants in India could have an impact on previously recorded tangible and intangible assets, including amounts originally recorded as tenant-related intangibles. The carrying value of tenant-related intangibles in India was $1.0 billion as of December 31, 2020, which represents 10% of our consolidated balance of $10.1 billion. Additionally, a significant reduction in tenant related cash flows in India could also impact our tower portfolio and network location intangibles. The carrying values of our tower portfolio and network location intangibles in India were $1.0 billion and $410.9 million, respectively, as of December 31, 2020, which represent 13% and 11% of our consolidated balances of $8.0 billion and $3.7 billion, respectively.



- Impairment of Assets—Goodwill: We review goodwill for impairment at least annually (as of December 31) or whenever events or circumstances indicate the carrying amount of an asset may not be recoverable. Goodwill is recorded in the applicable segment and assessed for impairment at the reporting unit level. We employ a discounted cash flow analysis when testing goodwill. The key assumptions utilized in the discounted cash flow analysis include current operating performance, terminal sales growth rate, management’s expectations of future operating results and cash requirements, the current weighted average cost of capital and an expected tax rate. We compare the fair value of the reporting unit, as calculated under an income approach using future discounted cash flows, to the carrying amount of the applicable reporting unit. If the carrying amount exceeds the fair value, an impairment loss would be recognized for the amount of the excess. The loss recognized is limited to the total amount of goodwill allocated to that reporting unit.

During the year ended December 31, 2020, no potential goodwill impairment was identified as the fair value of each of our reporting units was in excess of its carrying amount.

- Asset Retirement Obligations: When required, we recognize the fair value of obligations to remove our tower assets and remediate the leased land upon which certain of our tower assets are located. Generally, the associated retirement costs are capitalized as part of the carrying amount of the related tower assets and depreciated over their estimated useful lives and the liability is accreted through the obligation’s estimated settlement date.

We updated our assumptions used in estimating our aggregate asset retirement obligation, which resulted in a net increase in the estimated obligation of $65.0 million during the year ended December 31, 2020. The change in 2020 primarily resulted from changes in timing of certain settlement date and cost assumptions. Fair value estimates of liabilities for asset retirement obligations generally involve discounting of estimated future cash flows. Periodic accretion of such liabilities due to the passage of time is included in Depreciation, amortization and accretion expense in the consolidated statements of operations. The significant assumptions used in estimating our aggregate asset retirement obligation are: timing of tower removals; cost of tower removals; timing and number of land lease renewals; expected inflation rates; and credit-adjusted risk-free interest rates that approximate our incremental borrowing rate. While we feel the assumptions are appropriate, there can be no assurances that actual costs and the probability of incurring obligations will not differ from these estimates. We will continue to review these assumptions periodically and we may need to adjust them as necessary.

- Acquisitions: We evaluate each of our acquisitions under the accounting guidance framework to determine whether to treat an acquisition as an asset acquisition or a business combination. For those transactions treated as asset acquisitions, the purchase price is allocated to the assets acquired, with no recognition of goodwill. For those acquisitions that meet the definition of a business combination, we apply the acquisition method of accounting where assets acquired and liabilities assumed are recorded at fair value at the date of each acquisition, and the results of operations are included with our results from the dates of the respective acquisitions. Any excess of the purchase price paid over the amounts recognized for assets acquired and liabilities assumed is recorded as goodwill. We continue to evaluate acquisitions accounted for as business combinations for a period not to exceed one year after the applicable acquisition date of each transaction to determine whether any additional adjustments are needed to the allocation of the purchase price paid for the assets acquired and liabilities assumed. The fair value of the assets acquired and liabilities assumed is typically determined by using either estimates of replacement costs or discounted cash flow valuation methods. When determining the fair value of tangible assets acquired, we must estimate the cost to replace the asset with a new asset taking into consideration such factors as age, condition and the economic useful life of the asset. When determining the fair value of intangible assets acquired, we must estimate the applicable discount rate and the timing and amount of future tenant cash flows, including rate and terms of renewal and attrition.

- Revenue Recognition: Our revenue is derived from leasing the right to use our communications sites and the land on which the sites are located (the “lease component”) and from the reimbursement of costs incurred in operating the communications sites and supporting the tenants’ equipment as well as other services and contractual rights (the “non-lease component”). Most of our revenue is derived from leasing arrangements and is accounted for as lease revenue unless the timing and pattern of revenue recognition of the non-lease component differs from the lease component. If the timing and pattern of the non-lease component revenue recognition differs from that of the lease component, we separately determine the stand-alone selling prices and pattern of revenue recognition for each performance obligation.

Our revenue from leasing arrangements, including fixed escalation clauses present in non-cancellable lease arrangements, is reported on a straight-line basis over the term of the respective leases when collectibility is probable. Escalation clauses tied to a consumer price index or other inflation-based indices, and other incentives present in lease agreements with our tenants, are excluded from the straight-line calculation. Total property straight-line revenues for the years ended December 31, 2020, 2019 and 2018 were $322.0 million, $183.5 million and $87.6 million,



respectively. Amounts billed upfront in connection with the execution of lease agreements are initially deferred and reflected in Unearned revenue in the accompanying consolidated balance sheets and recognized as revenue over the terms of the applicable lease arrangements. Amounts billed or received for services prior to being earned are deferred and reflected in Unearned revenue in the accompanying consolidated balance sheets until the criteria for recognition have been met.

We derive the largest portion of our revenues, corresponding trade receivables and the related deferred rent asset from a small number of tenants in the telecommunications industry, with 55% of our revenues derived from three tenants. In addition, we have concentrations of credit risk in certain geographic areas. We mitigate the concentrations of credit risk with respect to notes and trade receivables by actively monitoring the creditworthiness of our borrowers and tenants. In recognizing tenant revenue we assess the collectibility of both the amounts billed and the portion recognized on a straight-line basis. This assessment takes tenant credit risk and business and industry conditions into consideration to ultimately determine the collectibility of the amounts billed. To the extent the amounts, based on management’s estimates, may not be collectible, recognition is deferred until such point as the uncertainty is resolved. Any amounts that were previously recognized as revenue and subsequently determined to be uncollectible are charged to bad debt expense. Accounts receivable are reported net of allowances for doubtful accounts related to estimated losses resulting from a tenant’s inability to make required payments and allowances for amounts invoiced whose collectibility is not reasonably assured.

- Rent Expense and Lease Accounting: Many of the leases underlying our tower sites have fixed rent escalations, which provide for periodic increases in the amount of ground rent payable over time. In addition, certain of our tenant leases require us to exercise available renewal options pursuant to the underlying ground lease if the tenant exercises its renewal option. Our calculation of the lease liability includes straight-line ground rent expense for these leases based on the term of the underlying ground lease plus all periods, if any, for which failure to renew the lease imposes an economic penalty to us such that renewal appears to be reasonably assured.

Effective January 1, 2019, we adopted the new lease standard using the modified retrospective method applied to lease arrangements that were in place on the transition date. The new lease accounting guidance required us to recognize a right-of-use lease asset and lease liability for operating and finance leases. The right-of-use asset is measured as the sum of the lease liability, prepaid or accrued lease payments, any initial direct costs incurred and any other applicable amounts.

The calculation of the lease liability requires us to make certain assumptions for each lease, including lease term and discount rate implicit in each lease, which could significantly impact the gross lease obligation, the duration and the present value of the lease liability. When calculating the lease term, we consider the renewal, cancellation and termination rights available to us and the lessor. We determine the discount rate by calculating the incremental borrowing rate on a collateralized basis at the commencement of a lease or upon a change in the lease term.

• Income Taxes: Accounting for income taxes requires us to estimate the timing and impact of amounts recorded in our financial statements that may be recognized differently for tax purposes. To the extent that the timing of amounts recognized for financial reporting purposes differs from the timing of recognition for tax reporting purposes, deferred tax assets or liabilities are required to be recorded. We measure deferred tax assets and liabilities using enacted tax rates expected to apply to taxable income in the years in which those temporary differences and carryforwards are expected to be recovered or settled. The effect on deferred tax assets and liabilities as a result of a change in tax rates is recognized in income in the period that includes the enactment date. We do not expect to pay federal income taxes on our REIT taxable income.

We periodically review our deferred tax assets, and we record a valuation allowance if, based on the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. Management assesses the available positive and negative evidence to estimate if sufficient future taxable income will be generated to use the existing deferred tax assets. Valuation allowances would be reversed as a reduction to the provision for income taxes, if related deferred tax assets are deemed realizable based on changes in facts and circumstances relevant to the assets' recoverability.

We recognize the benefit of uncertain tax positions when, in management’s judgment, it is more likely than not that positions we have taken in our tax returns will be sustained upon examination, which are measured at the largest amount that is greater than 50% likely of being realized upon settlement. We adjust our tax liabilities when our judgment changes as a result of the evaluation of new information or information not previously available. Due to the complexity of some of these uncertainties, the ultimate resolution may result in a payment that is materially different from our current estimate of the tax liabilities. These differences will be reflected as increases or decreases to income tax expense in the period in which additional information is available or the position is ultimately settled under audit.



## Accounting Standards Update

For a discussion of recent accounting standards updates, see note 1 to our consolidated financial statements included in this Annual Report.

## ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The following table provides information as of December 31, 2020 about our market risk exposure associated with changing interest rates. For long-term debt obligations, the table presents principal cash flows by maturity date and average interest rates related to outstanding obligations. For interest rate swaps, the table presents notional principal amounts and weighted-average interest rates (in millions, except percentages). For more information, see Item 7 of this Annual Report under the caption "Management's Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources" and note 9 to our consolidated financial statements included in this Annual Report.

<table><tr><td>Long-Term Debt</td><td>2021</td><td>2022</td><td>2023</td><td>2024</td><td>2025</td><td>Thereafter</td><td>Total</td><td>Fair Value</td></tr><tr><td>Fixed Rate Debt (a)</td><td>$ 28.1</td><td>$ 1,304.6</td><td>$ 3,318.9</td><td>$ 2,151.9</td><td>$ 4,271.0</td><td>$ 14,331.5</td><td>$ 25,406.0</td><td>$ 27,308.6</td></tr><tr><td>Weighted-Average Interest Rate (a)</td><td>7.09%</td><td>3.69%</td><td>2.89%</td><td>3.49%</td><td>2.35%</td><td>2.82%</td><td></td><td></td></tr><tr><td>Variable Rate Debt (b)</td><td>$ 761.7</td><td>$ —</td><td>$ —</td><td>$ —</td><td>$ 3,295.0</td><td>$ —</td><td>$ 4,056.7</td><td>$ 4,054.5</td></tr><tr><td>Weighted-Average Interest Rate (b)(c)</td><td>0.92%</td><td>—%</td><td>—%</td><td>—%</td><td>1.25%</td><td>—%</td><td></td><td></td></tr><tr><td>Interest Rate Swaps</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Hedged Variable-Rate Notional Amount</td><td>$ 8.7</td><td>$ —</td><td>$ —</td><td>$ —</td><td>$ —</td><td>$ —</td><td>$ 8.7</td><td>$ (0.1) (d)</td></tr><tr><td>Fixed Rate Debt Rate (e)</td><td></td><td></td><td></td><td></td><td></td><td></td><td>9.37%</td><td></td></tr><tr><td>Hedged Fixed-Rate Notional Amount</td><td>$ —</td><td>$ 600.0</td><td>$ 500.0</td><td>$ —</td><td>$ —</td><td>$ —</td><td>$ 1,100.0</td><td>$ 29.2 (f)</td></tr><tr><td>Variable Rate Debt Rate (g)</td><td></td><td></td><td></td><td></td><td></td><td></td><td>1.24%</td><td></td></tr></table>

(a) Fixed rate debt consisted of: Securities issued in the Trust Securitizations; Securities issued in the 2015-2 Securitization; the InSite Debt, which was subsequently repaid in full on January 15, 2021; our senior unsecured notes (see note 9 to our consolidated financial statements included in this Annual Report for a detailed description of all such senior unsecured notes); the Kenya Debt; the U.S. Subsidiary Debt; and other debt including finance leases.

(b) Variable rate debt consisted of: the 2020 Term Loan, which was subsequently repaid in full on February 5, 2021; the 2019 Multicurrency Credit Facility, which matures on June 28, 2024; the 2019 Credit Facility, which matures on January 31, 2026; the 2019 Term Loan, which matures on January 31, 2025; and the Colombian credit facility, which amortizes through April 24, 2021.

(c) Based on rates effective as of December 31, 2020.

(d) As of December 31, 2020, the interest rate swap agreement in Colombia was included in Other non-current liabilities on the consolidated balance sheet.

(e) Represents the fixed rate of interest based on contractual notional amount as a percentage of the total notional amount. The interest rate consists of fixed interest of 5.37%, per the interest rate agreement, and a fixed margin of 4.00%, per the loan agreement for the Colombian credit facility.

(f) As of December 31, 2020, the interest rate swap agreements in the U.S. were included in Other non-current assets on the consolidated balance sheet.

(g) Represents the weighted average variable rate of interest based on contractual notional amount as a percentage of total notional amounts.

## Interest Rate Risk

As of December 31, 2020, we have one interest rate swap agreement related to debt in Colombia. This swap has been designated as a cash flow hedge, has a notional amount of $8.7 million, has an interest rate of 5.37% and expires in April 2021. We also have three interest rate swap agreements related to the 2.250% Notes. These swaps have been designated as fair value hedges, have an aggregate notional amount of $600.0 million, an interest rate of one-month LIBOR plus applicable spreads and expire in January 2022. In addition, we have three interest rate swap agreements related to a portion of the 3.000% Notes. These swaps have been designated as fair value hedges, have an aggregate notional amount of $500.0 million, an interest rate of one-month LIBOR plus applicable spreads and expire in June 2023.

Changes in interest rates can cause interest charges to fluctuate on our variable rate debt. Variable rate debt as of December 31, 2020 consisted of $2.3 billion under the 2019 Credit Facility, $1.0 billion under the 2019 Term Loan, $750.0 million under the 2020 Term Loan, $600.0 million under the interest rate swap agreements related to the 2.250% Notes, $500.0 million under the interest rate swap agreements related to the 3.000% Notes and $2.9 million under the Colombian credit facility after giving effect to our interest rate swap agreements. A 10% increase in current interest rates would result in an additional $6.1 million of interest expense for the year ended December 31, 2020.

## Foreign Currency Risk



We are exposed to market risk from changes in foreign currency exchange rates primarily in connection with our foreign subsidiaries and joint ventures internationally. Any transaction denominated in a currency other than the U.S. Dollar is reported in U.S. Dollars at the applicable exchange rate. All assets and liabilities are translated into U.S. Dollars at exchange rates in effect at the end of the applicable fiscal reporting period and all revenues and expenses are translated at average rates for the period. The cumulative translation effect is included in equity as a component of Accumulated other comprehensive loss. We may enter into additional foreign currency financial instruments in anticipation of future transactions to minimize the impact of foreign currency fluctuations. For the year ended December 31, 2020, 42% of our revenues and 52% of our total operating expenses were denominated in foreign currencies.

As of December 31, 2020, we have incurred intercompany debt that is not considered to be permanently reinvested, and similar unaffiliated balances that were denominated in a currency other than the functional currency of the subsidiary in which it is recorded. As this debt had not been designated as being a long-term investment in nature, any changes in the foreign currency exchange rates will result in unrealized gains or losses, which will be included in our determination of net income. An adverse change of 10% in the underlying exchange rates of our unsettled intercompany debt and similar unaffiliated balances would result in $129.2 million of unrealized losses that would be included in Other expense in our consolidated statements of operations for the year ended December 31, 2020.

## ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

See Item 15 (a).

## ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

## ITEM 9A. CONTROLS AND PROCEDURES

## Disclosure Controls and Procedures

We have established disclosure controls and procedures designed to ensure that material information relating to us, including our consolidated subsidiaries, is made known to the officers who certify our financial reports and to other members of senior management and the Board of Directors.

Our management, with the participation of our principal executive officer and principal financial officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this Annual Report. Based on this evaluation, our principal executive officer and principal financial officer concluded that these disclosure controls and procedures were effective as of December 31, 2020 and designed to ensure that the information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the requisite time periods specified in the applicable rules and forms, and that it is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.



## Management’s Annual Report on Internal Control over Financial Reporting

Our management, with the participation of our principal executive officer and principal financial officer, is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. Our internal control system is designed to provide reasonable assurance to our management and Board of Directors regarding the preparation and fair presentation of published financial statements.

Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2020. As discussed in Item 1 of this Annual Report under the caption “Business” and in note 7 to our consolidated financial statements included in this Annual Report, we completed the InSite Acquisition on December 23, 2020. As permitted by the rules and regulations of the SEC, we excluded from our assessment the internal control over financial reporting at InSite, whose financial statements reflect total assets and revenues constituting 8% and 0%, respectively, of the consolidated financial statement amounts as of, and for the year ended, December 31, 2020.

In making its assessment of internal control over financial reporting, our management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission in Internal Control—Integrated Framework (2013). Based on this assessment, management concluded that, as of December 31, 2020, our internal control over financial reporting is effective.

Deloitte & Touche LLP, an independent registered public accounting firm that audited our financial statements included in this Annual Report, has issued an attestation report on management’s internal control over financial reporting, which is included in this Item 9A under the caption “Report of Independent Registered Public Accounting Firm.”

## Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) during the fiscal quarter ended December 31, 2020 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. As set forth above, we excluded from our assessment the internal control over financial reporting at InSite for the year ended December 31, 2020. We consider InSite material to our results of operations, financial position and cash flows, and we are in the process of integrating the internal control procedures of InSite into our internal control structure.



# REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of American Tower Corporation

## Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of American Tower Corporation and subsidiaries (the “Company”) as of December 31, 2020, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control — Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2020, of the Company and our report dated February 25, 2021, expressed an unqualified opinion on those financial statements.

As described in Management’s Annual Report on Internal Control over Financial Reporting, management excluded from its assessment the internal control over financial reporting at InSite Wireless Group, LLC (“InSite”), which was acquired on December 23, 2020, and whose financial statements constitute 8% of total assets and 0% of total revenues of the consolidated financial statement amounts as of and for the year ended December 31, 2020. Accordingly, our audit did not include the internal control over financial reporting at InSite.

## Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

## Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

February 25, 2021



## PART III

## ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Our executive officers and their respective ages and positions as of February 18, 2021 are set forth below:

<table><tr><td>Thomas A. Bartlett</td><td>62</td><td>President and Chief Executive Officer</td></tr><tr><td>Rodney M. Smith</td><td>55</td><td>Executive Vice President, Chief Financial Officer and Treasurer</td></tr><tr><td>Edmund DiSanto</td><td>68</td><td>Executive Vice President, Chief Administrative Officer, General Counsel and Secretary</td></tr><tr><td>Robert J. Meyer, Jr.</td><td>57</td><td>Senior Vice President and Chief Accounting Officer</td></tr><tr><td>Olivier Puech</td><td>53</td><td>Executive Vice President and President, Latin America and EMEA</td></tr><tr><td>Amit Sharma</td><td>70</td><td>Executive Vice President and President, Asia</td></tr><tr><td>Steven O. Vondran</td><td>50</td><td>Executive Vice President and President, U.S. Tower Division</td></tr></table>

Thomas A. Bartlett is our President and Chief Executive Officer. Mr. Bartlett joined us in April 2009 as Executive Vice President and Chief Financial Officer and served in that role until March 2020 when he was appointed to his current position. Mr. Bartlett served as our Treasurer from February 2012 to December 2013, and again from July 2017 to August 2018. Prior to joining us, Mr. Bartlett served as Senior Vice President and Corporate Controller with Verizon Communications. During his 25-year career with Verizon Communications and its predecessor companies and affiliates, he served in numerous operations and business development roles, including as President and Chief Executive Officer of Bell Atlantic International Wireless from 1995 through 2000, where he was responsible for wireless activities in North America, Latin America, Europe and Asia. In addition, Mr. Bartlett served as CEO of Iusacell, a publicly traded, nationwide cellular company in Mexico, CEO of Verizon's Global Solutions Inc., a global connectivity business providing lit and dark fiber services primarily to global enterprises, and as an Area President for Verizon's U.S. wireless business, where he was responsible for all operational aspects of the business in the Northeast and Mid-Atlantic states. He began his career at Deloitte, Haskins & Sells. Mr. Bartlett is a member of the World Economic Forum's Information and Communications Technologies (ICT) Board of Governors, the National Association of Real Estate Investment Trust (NAREIT) Executive Committee and the Business Roundtable. He currently serves on the Board of Directors of Equinix, Inc., sits on the Samaritans advisory council, is on the Board of Advisors of the Rutgers Business School, is a member of the New England Technology Executive Summit and is on the Massachusetts Institute of Technology Presidential CEO Advisory Board. He earned an M.B.A. from Rutgers University and a Bachelor of Science degree in Engineering from Lehigh University.

Rodney M. Smith is our Executive Vice President, Chief Financial Officer and Treasurer. Mr. Smith joined us in October 2009, and previously held the roles of Senior Vice President, Corporate Finance and Treasurer and Senior Vice President and Chief Financial Officer of American Tower's U.S. Tower Division. Prior to joining us, Mr. Smith served as Executive Vice President, Chief Financial Officer and as a general Board Member of Lighttower, a private equity backed wireless infrastructure company. Prior to Lighttower, he served as Chief Financial Officer and Treasurer (and earlier as Vice President and Controller) for RoweCom, a publicly traded company with operations in eight countries. Early in his career, Mr. Smith held several leadership positions at Nextel Communications, including Director of Finance and General Manager of one of the Company's Northeast markets. Mr. Smith earned his M.B.A from Suffolk University, a Certificate of Accountancy from Bentley College and a Bachelor of Science in Finance from Merrimack College.

Edmund DiSanto is our Executive Vice President, Chief Administrative Officer, General Counsel and Secretary. Prior to joining us in April 2007, Mr. DiSanto was with Pratt & Whitney, a unit of United Technologies Corporation. Mr. DiSanto started with United Technologies in 1989, where he first served as Assistant General Counsel of its Carrier subsidiary, then as corporate Executive Assistant to the Chairman and Chief Executive Officer of United Technologies. From 1997, he held various legal and business roles at its Pratt & Whitney unit, including Deputy General Counsel and most recently, Vice President, Global Service Partners, Business Development. Prior to joining United Technologies, Mr. DiSanto served in a number of legal and related positions at United Dominion Industries and New England Electric Systems. Mr. DiSanto earned a J.D. from Boston College Law School and a Bachelor of Science from Northeastern University. In 2013, Mr. DiSanto became a member of the Board of Directors of the Business Council for International Understanding. Mr. DiSanto also currently serves as a Strategic Officer at the World Economic Forum and in 2020, Mr. DiSanto was named to the Board of the U.S.-India Business Council.

Robert J. Meyer, Jr. is our Senior Vice President and Chief Accounting Officer. Mr. Meyer joined us in August 2008 as our Senior Vice President, Finance and Corporate Controller and served in that role until January 2020 when he was appointed to his current position. Prior to joining us, Mr. Meyer was with Bright Horizons Family Solutions since 1998, a provider of child care, early education and work/life consulting services, where he most recently served as Chief Accounting Officer. Mr. Meyer also served as Corporate Controller and Vice President of Finance while at Bright Horizons. Prior to that, from 1997 to 1998,



Mr. Meyer served as Director of Financial Planning and Analysis at First Security Services Corp. Mr. Meyer earned a Masters in Finance from Bentley University and a Bachelor of Science in Accounting from Marquette University, and is a Certified Public Accountant.

Olivier Puech is our Executive Vice President and President, Latin America and EMEA. Mr. Puech joined us in 2013 as Senior Vice President and CEO of Latin America and served in that role until October 2018 when he was appointed to his current position. Prior to joining us, Mr. Puech spent 25 years as a senior executive in the telecom and internet sectors of international organizations. Most recently, he was with Nokia where he held various leadership roles including Senior Vice President Americas, Senior Vice President Asia Pacific and Vice President Latin America. Before Nokia, Mr. Puech spent 12 years at Gemalto, where he last held the position of Vice President, Sales and Marketing with responsibility for South Europe, Eastern Europe and Latin America. Mr. Puech holds a bachelor's degree in International Business Administration from Ecole Supérieure De Commerce in Marseille, in France. In June 2019, Mr. Puech was appointed by the U.S. Secretary of Commerce to serve on the President's Advisory Council on Doing Business in Africa. He is fluent in English, French, Spanish, Italian and Portuguese.

Amit Sharma is our Executive Vice President and President, Asia. Mr. Sharma joined us in September 2007. Prior to joining us, from 1992, Mr. Sharma worked at Motorola, where he led country teams in India and Southeast Asia, including as Country President, India and as Head of Strategy, Asia-Pacific. Mr. Sharma also served on Motorola's Asia-Pacific Board and was a member of its senior leadership team. Previously, Mr. Sharma worked at GE Capital, serving as Vice President, Strategy and Business Development, and prior to that, with McKinsey, New York, serving as a core member of the firm's Electronics and Marketing Practices. Mr. Sharma earned an M.B.A. in International Business from the Wharton School, University of Pennsylvania, where he was on the Dean's List and the Director's Honors List. Mr. Sharma also holds a Master of Science in Computer Science from the Moore School, University of Pennsylvania, and a Bachelor of Technology in Mechanical Engineering from the Indian Institute of Technology.

Steven O. Vondran is our Executive Vice President and President, U.S. Tower Division. Mr. Vondran joined us in 2000 as a member of our corporate legal team and served in a variety of positions until August 2004 when he was appointed Senior Vice President of our U.S. Leasing Operations. In August 2010, Mr. Vondran was appointed Senior Vice President, General Counsel of our U.S. Tower Division and served in that role until August 2018, when he was appointed to his current position. Mr. Vondran joined the Cellular Telecommunications Industry Association (CTIA) Board in September 2018, and, in October 2018, he joined the Board of Directors for the Wireless Infrastructure Association (WIA). Prior to joining us, Mr. Vondran was an associate at the law firm of Lewellen & Frazier LLP, served as a telecommunications consultant with the firm of Young & Associates, Inc., and was a Law Clerk to the Hon. John Stroud on the Arkansas Court of Appeals. He received his J.D. with high honors from the University of Arkansas at Little Rock School of Law and a Bachelor of Arts in Economics and Business from Hendrix College.

The information under “Election of Directors” and “Delinquent Section 16(a) Reports,” if applicable, from the Definitive Proxy Statement is incorporated herein by reference. Information required by this item pursuant to Item 407(c)(3) of SEC Regulation S-K relating to our procedures by which security holders may recommend nominees to our Board of Directors, and pursuant to Item 407(d)(4) and 407(d)(5) of SEC Regulation S-K relating to our audit committee financial experts and identification of the audit committee of our Board of Directors, is contained in the Definitive Proxy Statement under “Corporate Governance” and is incorporated herein by reference.

Information regarding our Code of Conduct applicable to our principal executive officer, our principal financial officer, our controller and other senior financial officers appears in Item 1 of this Annual Report under the caption “Business—Available Information.”

## ITEM 11. EXECUTIVE COMPENSATION

The information under “Compensation and Other Information Concerning Directors and Officers” from the Definitive Proxy Statement is incorporated herein by reference.

## ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information under “Security Ownership of Certain Beneficial Owners and Management” and “Securities Authorized for Issuance Under Equity Compensation Plans” from the Definitive Proxy Statement is incorporated herein by reference.



## ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

Information required by this item pursuant to Item 404 of SEC Regulation S-K relating to approval of related party transactions is contained in the Definitive Proxy Statement under “Corporate Governance” and is incorporated herein by reference.

Information required by this item pursuant to Item 407(a) of SEC Regulation S-K relating to director independence is contained in the Definitive Proxy Statement under “Corporate Governance” and is incorporated herein by reference.

## ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES

The information under “Independent Auditor Fees and Other Matters” from the Definitive Proxy Statement is incorporated herein by reference.



## PART IV

## ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES

(a) The following documents are filed as a part of this report:

1. Financial Statements. See Index to Consolidated Financial Statements, which appears on page F-1 hereof. The financial statements listed in the accompanying Index to Consolidated Financial Statements are filed herewith in response to this Item.

2. Financial Statement Schedules. American Tower Corporation and Subsidiaries Schedule III – Schedule of Real Estate and Accumulated Depreciation is filed herewith in response to this Item.

## 3. Exhibits.

Pursuant to the rules and regulations of the SEC, the Company has filed certain agreements as exhibits to this Annual Report on Form 10-K. These agreements may contain representations and warranties by the parties. These representations and warranties have been made solely for the benefit of the other party or parties to such agreements and (i) may have been qualified by disclosures made to such other party or parties, (ii) were made only as of the date of such agreements or such other date(s) as may be specified in such agreements and are subject to more recent developments, which may not be fully reflected in the Company’s public disclosure, (iii) may reflect the allocation of risk among the parties to such agreements and (iv) may apply materiality standards different from what may be viewed as material to investors. Accordingly, these representations and warranties may not describe the Company’s actual state of affairs at the date hereof and should not be relied upon.

The exhibits below are included, either by being filed herewith or by incorporation by reference, as part of this Annual Report on Form 10-K. Exhibits are identified according to the number assigned to them in Item 601 of SEC Regulation S-K. Documents that are incorporated by reference are identified by their Exhibit number as set forth in the filing from which they are incorporated by reference.

<table><tr><td rowspan="2">Exhibit No.</td><td rowspan="2">Description of Document</td><td colspan="4">Incorporated By Reference</td></tr><tr><td>Form</td><td>File No.</td><td>Date of Filing</td><td>Exhibit No.</td></tr><tr><td>2.1</td><td>Agreement and Plan of Merger by and between American Tower Corporation and American Tower REIT, Inc., dated as of August 24, 2011</td><td>8-K</td><td>001-14195</td><td>August 25, 2011</td><td>2.1</td></tr><tr><td>3.1</td><td>Restated Certificate of Incorporation of the Company as filed with the Secretary of State of the State of Delaware, effective as of December 31, 2011</td><td>8-K</td><td>001-14195</td><td>January 3, 2012</td><td>3.1</td></tr><tr><td>3.2</td><td>Certificate of Merger, effective as of December 31, 2011</td><td>8-K</td><td>001-14195</td><td>January 3, 2012</td><td>3.2</td></tr><tr><td>3.3</td><td>Amended and Restated By-Laws of the Company, effective as of February 12, 2016</td><td>8-K</td><td>001-14195</td><td>February 16, 2016</td><td>3.1</td></tr><tr><td>3.4</td><td>Certificate of Designations of the 5.25% Mandatory Convertible Preferred Stock, Series A, of the Company as filed with the Secretary of State of the State of Delaware, effective as of May 12, 2014</td><td>8-K</td><td>001-14195</td><td>May 12, 2014</td><td>3.1</td></tr><tr><td>3.5</td><td>Certificate of Designations of the 5.50% Mandatory Convertible Preferred Stock, Series B, of the Company as filed with the Secretary of State of the State of Delaware, effective as of March 3, 2015</td><td>8-K</td><td>001-14195</td><td>March 3, 2015</td><td>3.1</td></tr><tr><td>4.1</td><td>Indenture dated as of May 13, 2010, by and between the Company and The Bank of New York Mellon Trust Company N.A., as Trustee</td><td>S-3ASR</td><td>333-166805</td><td>May 13, 2010</td><td>4.3</td></tr><tr><td>4.2</td><td>Supplemental Indenture No. 4, dated as of December 30, 2011, to Indenture dated as of May 13, 2010, by and among, the Predecessor Registrant, the Company and The Bank of New York Mellon Trust Company N.A., as Trustee</td><td>8-K</td><td>001-14195</td><td>January 3, 2012</td><td>4.6</td></tr></table>



<table><tr><td rowspan="2">Exhibit No.</td><td rowspan="2">Description of Document</td><td colspan="4">Incorporated By Reference</td></tr><tr><td>Form</td><td>File No.</td><td>Date of Filing</td><td>Exhibit No.</td></tr><tr><td>4.3</td><td>Supplemental Indenture No. 5, dated as of March 12, 2012, to Indenture dated as of May 13, 2010, by and between the Company and The Bank of New York Mellon Trust Company N.A., as Trustee, for the 4.70% Senior Notes due 2022</td><td>8-K</td><td>001-14195</td><td>March 12, 2012</td><td>4.1</td></tr><tr><td>4.4</td><td>Supplemental Indenture No. 6, dated as of January 8, 2013, to Indenture dated as of May 13, 2010, by and between the Company and The Bank of New York Mellon Trust Company N.A., as Trustee, for the 3.50% Senior Notes due 2023</td><td>8-K</td><td>001-14195</td><td>January 8, 2013</td><td>4.1</td></tr><tr><td>4.5</td><td>Indenture dated as of May 23, 2013, by and between the Company and U.S. Bank National Association, as Trustee</td><td>S-3ASR</td><td>333-188812</td><td>May 23, 2013</td><td>4.12</td></tr><tr><td>4.6</td><td>Supplemental Indenture No. 1, dated as of August 19, 2013, to Indenture dated as of May 23, 2013, by and between the Company and U.S. Bank National Association, as Trustee, for the 5.00% Senior Notes due 2024</td><td>8-K</td><td>001-14195</td><td>August 19, 2013</td><td>4.1</td></tr><tr><td>4.7</td><td>Supplemental Indenture No. 3, dated as of May 7, 2015, to Indenture dated as of May 23, 2013, by and between the Company and U.S. Bank National Association, as Trustee, for the 4.000% Senior Notes due 2025</td><td>8-K</td><td>001-14195</td><td>May 7, 2015</td><td>4.1</td></tr><tr><td>4.8</td><td>Supplemental Indenture No. 4, dated as of January 12, 2016, to Indenture dated as of May 23, 2013, by and between the Company and U.S. Bank National Association, as Trustee, for the 4.400% Senior Notes due 2026</td><td>8-K</td><td>001-14195</td><td>January 12, 2016</td><td>4.1</td></tr><tr><td>4.9</td><td>Supplemental Indenture No. 5, dated as of May 13, 2016, to Indenture dated as of May 23, 2013, by and between the Company and U.S. Bank National Association, as Trustee, for the 3.375% Senior Notes due 2026</td><td>8-K</td><td>001-14195</td><td>May 13, 2016</td><td>4.1</td></tr><tr><td>4.10</td><td>Supplemental Indenture No. 6, dated as of September 30, 2016, to Indenture dated as of May 23, 2013, by and between the Company and U.S. Bank National Association, as Trustee, for the 2.250% Senior Notes due 2022 and the 3.125% Senior Notes due 2027</td><td>8-K</td><td>001-14195</td><td>September 30, 2016</td><td>4.1</td></tr><tr><td>4.11</td><td>Supplemental Indenture No. 7, dated as of April 6, 2017, to Indenture dated as of May 23, 2013, by and between the Company, U.S. Bank National Association, as Trustee, and Elavon Financial Services DAC, UK Branch, as Paying Agent, for the 1.375% Senior Notes due 2025</td><td>8-K</td><td>001-14195</td><td>April 6, 2017</td><td>4.1</td></tr><tr><td>4.12</td><td>Supplemental Indenture No. 8, dated as of June 30, 2017, to Indenture dated as of May 23, 2013, by and between the Company and U.S. Bank National Association, as Trustee, for the 3.55% Senior Notes due 2027</td><td>8-K</td><td>001-14195</td><td>June 30, 2017</td><td>4.1</td></tr><tr><td>4.13</td><td>Supplemental Indenture No. 9, dated as of December 8, 2017, to Indenture dated as of May 23, 2013, by and between the Company and U.S. Bank National Association, as Trustee, for the 3.000% Senior Notes due 2023 and the 3.600% Senior Notes due 2028</td><td>8-K</td><td>001-14195</td><td>December 8, 2017</td><td>4.1</td></tr></table>



<table><tr><td rowspan="2">Exhibit No.</td><td rowspan="2">Description of Document</td><td colspan="4">Incorporated By Reference</td></tr><tr><td>Form</td><td>File No.</td><td>Date of Filing</td><td>Exhibit No.</td></tr><tr><td>4.14</td><td>Supplemental Indenture No. 10, dated as of May 22, 2018, to Indenture dated as of May 23, 2013, by and between the Company and U.S. Bank National Association, as Trustee, and Elavon Financial Services DAC, UK Branch, as Paying Agent, for the 1.950% Senior Notes due 2026</td><td>8-K</td><td>001-14195</td><td>May 22, 2018</td><td>4.1</td></tr><tr><td>4.15</td><td>Supplemental Indenture No. 11, dated as of March 15, 2019, to Indenture dated as of May 23, 2013, by and between the Company and U.S. Bank National Association, as Trustee, for the 3.375% Senior Notes due 2024 and the 3.950% Senior Notes due 2029</td><td>8-K</td><td>001-14195</td><td>March 15, 2019</td><td>4.1</td></tr><tr><td>4.16</td><td>Indenture dated as of June 4, 2019, by and between the Company and U.S. Bank National Association, as Trustee</td><td>S-3ASR</td><td>333-231931</td><td>June 4, 2019</td><td>4.22</td></tr><tr><td>4.17</td><td>Supplemental Indenture No. 1, dated as of June 13, 2019, to Indenture dated as of June 4, 2019, by and between American Tower Corporation and U.S. Bank National Association, as Trustee, for the 2.950% Senior Notes due 2025 and the 3.800% Senior Notes due 2029</td><td>8-K</td><td>001-14195</td><td>June 13, 2019</td><td>4.1</td></tr><tr><td>4.18</td><td>Supplemental Indenture No. 2, dated as of October 3, 2019, to Indenture dated as of June 4, 2019, by and between American Tower Corporation and U.S. Bank National Association, as Trustee, for the 2.750% Senior Notes due 2027 and the 3.700% Senior Notes due 2049</td><td>8-K</td><td>001-14195</td><td>October 3, 2019</td><td>4.1</td></tr><tr><td>4.19</td><td>Supplemental Indenture No. 3, dated as of January 10, 2020, to Indenture dated as of June 4, 2019, by and between American Tower Corporation and U.S. Bank National Association, as Trustee, for the 2.400% Senior Notes due 2025 and the 2.900% Senior Notes due 2030</td><td>8-K</td><td>001-14195</td><td>January 10, 2020</td><td>4.1</td></tr><tr><td>4.20</td><td>Supplemental Indenture No. 4, dated as of June 3, 2020, to Indenture dated as of June 4, 2019, by and between American Tower Corporation and U.S. Bank National Association, as Trustee, for the 1.300% Senior Notes due 2025, the 2.100% Senior Notes due 2030 and the 3.100% Senior Notes due 2050</td><td>8-K</td><td>001-14195</td><td>June 3, 2020</td><td>4.1</td></tr><tr><td>4.21</td><td>Supplemental Indenture No. 5, dated as of September 10, 2020, to Indenture dated as of June 4, 2019, by and between the Company, U.S. Bank National Association, as Trustee, and Elavon Financial Services DAC, UK Branch, as Paying Agent, for the 0.500% Senior Notes due 2028 and the 1.000% Senior Notes due 2032</td><td>8-K</td><td>001-14195</td><td>September 10, 2020</td><td>4.1</td></tr><tr><td>4.22</td><td>Supplemental Indenture No. 6, dated as of September 28, 2020, to Indenture dated as of June 4, 2019, by and between American Tower Corporation and U.S. Bank National Association, as Trustee, for the 1.875% Senior Notes due 2030</td><td>8-K</td><td>001-14195</td><td>September 28, 2020</td><td>4.1</td></tr><tr><td>4.23</td><td>Supplemental Indenture No. 7, dated as of November 20, 2020, to Indenture dated as of June 4, 2019, by and between American Tower Corporation and U.S. Bank National Association, as Trustee, for the 0.600% Senior Notes due 2024, the 1.500% Senior Notes due 2028 and the 2.950% Senior Notes due 2051</td><td>8-K</td><td>001-14195</td><td>November 20, 2020</td><td>4.1</td></tr></table>



<table><tr><td rowspan="2">Exhibit No.</td><td rowspan="2">Description of Document</td><td colspan="4">Incorporated By Reference</td></tr><tr><td>Form</td><td>File No.</td><td>Date of Filing</td><td>Exhibit No.</td></tr><tr><td>4.24</td><td>Third Amended and Restated Indenture, dated May 29, 2015, by and between GTP Acquisition Partners I, LLC, ACC Tower Sub, LLC, DCS Tower Sub, LLC, GTP South Acquisitions II, LLC, GTP Acquisition Partners II, LLC, GTP Acquisition Partners, III, LLC, GTP Infrastructure I, LLC, GTP Infrastructure II, LLC, GTP Infrastructure III, LLC, GTP Towers VIII, LLC, GTP Towers I, LLC, GTP Towers II, LLC, GTP Towers IV, LLC, GTP Towers V, LLC, GTP Towers VII, LLC, GTP Towers IX, LLC, PCS Structures Towers, LLC and GTP TRS I LLC, as Obligors, and The Bank of New York Mellon, as Trustee</td><td>10-Q</td><td>001-14195</td><td>July 29, 2015</td><td>4.2</td></tr><tr><td>4.25</td><td>Series 2015-2 Supplement, dated May 29, 2015, to the Third Amended and Restated Indenture dated May 29, 2015</td><td>10-Q</td><td>001-14195</td><td>July 29, 2015</td><td>4.4</td></tr><tr><td>4.26</td><td>Description of Registrant&#x27;s Securities</td><td>Filed herewith as Exhibit 4.26</td><td>—</td><td>—</td><td>—</td></tr><tr><td>10.1</td><td>American Tower Corporation 2000 Employee Stock Purchase Plan, as amended and restated</td><td>10-K</td><td>001-14195</td><td>March 1, 2010</td><td>10.5</td></tr><tr><td>10.2*</td><td>American Tower Corporation 2007 Equity Incentive Plan</td><td>DEF 14A</td><td>001-14195</td><td>March 22, 2017</td><td>Annex A</td></tr><tr><td>10.3*</td><td>Amendment to American Tower Corporation 2007 Equity Incentive Plan</td><td>8-K</td><td>001-14195</td><td>March 14, 2017</td><td>10.1</td></tr><tr><td>10.4*</td><td>Form of Notice of Grant of Nonqualified Stock Option and Option Agreement (U.S. Employee) Pursuant to the American Tower Corporation 2007 Equity Incentive Plan, as amended</td><td>10-K</td><td>001-14195</td><td>February 27, 2013</td><td>10.6</td></tr><tr><td>10.5*</td><td>Form of Restricted Stock Unit Agreement (Non-U.S. Employee) (For grants made through February 28, 2019) Pursuant to the American Tower Corporation 2007 Equity Incentive Plan, as amended</td><td>10-K</td><td>001-14195</td><td>February 27, 2013</td><td>10.9</td></tr><tr><td>10.6*</td><td>Form of Notice of Grant of Restricted Stock Units and RSU Agreement (U.S. Employee / Time) (Non-Employee Director) (For grants made March 10, 2016 - February 28, 2019) Pursuant to the American Tower Corporation 2007 Equity Incentive Plan, as amended</td><td>8-K</td><td>001-14195</td><td>March 9, 2016</td><td>10.1</td></tr><tr><td>10.7*</td><td>Form of Restricted Stock Unit Agreement (U.S. Employee/ Non-Employee Director) (For grants made beginning March 1, 2019) Pursuant to the American Tower Corporation 2007 Equity Incentive Plan, as amended</td><td>10-K</td><td>001-14195</td><td>February 27, 2019</td><td>10.10</td></tr><tr><td>10.8*</td><td>Form of Restricted Stock Unit Agreement (Non-U.S. Employee) (For grants made beginning March 1, 2019) Pursuant to the American Tower Corporation 2007 Equity Incentive Plan, as amended</td><td>10-K</td><td>001-14195</td><td>February 27, 2019</td><td>10.11</td></tr><tr><td>10.9*</td><td>Form of Notice of Grant of Performance-Based Restricted Stock Units Agreement (U.S. Employee) (For grants made before 2019) Pursuant to the American Tower Corporation 2007 Equity Incentive Plan, as amended</td><td>8-K</td><td>001-14195</td><td>July 31, 2018</td><td>10.1</td></tr></table>



<table><tr><td>Exhibit No.</td><td>Description of Document</td><td>Form</td><td>File No.</td><td>Date of Filing</td><td>Exhibit No.</td></tr><tr><td>10.10*</td><td>Form of Notice of Grant of Performance-Based Restricted Stock Units Agreement (U.S. Employee) (For grants made beginning 2019) Pursuant to the American Tower Corporation 2007 Equity Incentive Plan, as amended</td><td>10-K</td><td>001-14195</td><td>February 27, 2019</td><td>10.14</td></tr><tr><td>10.11*</td><td>Form of Notice of Grant of Performance-Based Restricted Stock Units Agreement (U.S. Employee) (For grants made beginning April 11, 2020) Pursuant to the American Tower Corporation 2007 Equity Incentive Plan, as amended</td><td>8-K/A</td><td>001-14195</td><td>April 16, 2020</td><td>10.1</td></tr><tr><td>10.12</td><td>Second Amended and Restated Loan and Security Agreement, dated as of March 29, 2018, by and between American Tower Asset Sub, LLC and American Tower Assets Sub II, LLC, as Borrowers, and U.S. Bank National Association, as Trustee for American Tower Trust I, as Lender</td><td>10-Q</td><td>001-14195</td><td>May 2, 2018</td><td>10.2</td></tr><tr><td>10.13</td><td>First Amended and Restated Management Agreement, dated as of March 15, 2013, by and between American Tower Asset Sub, LLC and American Tower Asset Sub II, LLC, as Owners, and SpectraSite Communications, LLC, as Manager</td><td>10-Q</td><td>001-14195</td><td>May 1, 2013</td><td>10.2</td></tr><tr><td>10.14</td><td>Second Amended and Restated Trust and Servicing Agreement, dated as of March 29, 2018, by and among American Tower Depositor Sub, LLC, as Depositor, Midland Loan Services, a Division of PNC Bank, National Association, as Servicer, and U.S. Bank National Association, as Trustee</td><td>10-Q</td><td>001-14195</td><td>May 2, 2018</td><td>10.3</td></tr><tr><td>10.15</td><td>Second Amended and Restated Cash Management Agreement, dated as of March 29, 2018, by and among American Tower Asset Sub, LLC and American Tower Asset Sub II, LLC, as Borrowers, and U.S. Bank National Association, as Trustee for American Tower Trust I Secured Tower Revenue Securities, as Lender, Midland Loan Services, a Division of PNC Bank, National Association, as Servicer, U.S. Bank National Association, as Agent, and SpectraSite Communications, LLC, as Manager</td><td>10-Q</td><td>001-14195</td><td>May 2, 2018</td><td>10.4</td></tr><tr><td>10.16</td><td>Agreement to Sublease by and among ALLTEL Communications, Inc. the ALLTEL entities and American Towers, Inc. and American Tower Corporation, dated December 19, 2000</td><td>10-K</td><td>001-14195</td><td>April 2, 2001</td><td>2.2</td></tr><tr><td>10.17</td><td>Lease and Sublease, dated as of December 14, 2000, by and among SBC Tower Holdings LLC, Southern Towers, Inc., SBC Wireless, LLC and SpectraSite Holdings, Inc.</td><td>SpectraSite Holdings, Inc. Quarterly Report on Form 10-Q</td><td>000-27217</td><td>May 11, 2001</td><td>10.2</td></tr><tr><td>10.18*</td><td>Amendment to Lease and Sublease, dated September 30, 2008, by and between SpectraSite, LLC, American Tower Asset Sub II, LLC, SBC Wireless, LLC and SBC Tower Holdings LLC</td><td>10-Q</td><td>001-14195</td><td>May 8, 2009</td><td>10.7</td></tr><tr><td>10.19*</td><td>Summary Compensation Information for Current Named Executive Officers</td><td>8-K</td><td>001-14195</td><td>March 2, 2020</td><td>Item 5.02(e)</td></tr></table>



<table><tr><td>Exhibit No.</td><td>Description of Document</td><td>Form</td><td>File No.</td><td>Date of Filing</td><td>Exhibit No.</td></tr><tr><td>10.20*</td><td>Summary Compensation Information for Newly Appointed Chief Executive Officer and Chief Financial Officer</td><td>8-K/A</td><td>001-14195</td><td>April 16, 2020</td><td>Item 5.02(c)</td></tr><tr><td>10.21</td><td>Form of Waiver and Termination Agreement</td><td>8-K</td><td>001-14195</td><td>March 5, 2009</td><td>10.4</td></tr><tr><td>10.22*</td><td>American Tower Corporation Severance Plan, as amended</td><td>10-K</td><td>001-14195</td><td>March 1, 2010</td><td>10.35</td></tr><tr><td>10.23*</td><td>American Tower Corporation Severance Plan, Program for Executive Vice Presidents and Chief Executive Officer, as amended</td><td>10-K</td><td>001-14195</td><td>March 1, 2010</td><td>10.36</td></tr><tr><td>10.24*</td><td>Assignment Letter Agreement, dated February 1, 2018, by and between the Company and Amit Sharma</td><td>10-K</td><td>001-14195</td><td>February 27, 2019</td><td>10.31</td></tr><tr><td>10.25*</td><td>Employment Letter Agreement, dated February 1, 2018, by and between the Company and Amit Sharma</td><td>10-K</td><td>001-14195</td><td>February 27, 2019</td><td>10.32</td></tr><tr><td>10.26*</td><td>Letter Agreement, dated as of April 24, 2020, by and between the Company and Thomas A. Bartlett</td><td>10-Q</td><td>001-14195</td><td>July 30, 2020</td><td>10.3</td></tr><tr><td>10.27*</td><td>Letter Agreement, dated as of April 24, 2020, by and between the Company and Rodney M. Smith</td><td>10-Q</td><td>001-14195</td><td>July 30, 2020</td><td>10.4</td></tr><tr><td>10.28*</td><td>Letter Agreement, dated as of September 15, 2018, by and between the Company and Olivier Puech</td><td>Filed herewith as Exhibit 10.28</td><td>—</td><td>—</td><td>—</td></tr><tr><td>10.29</td><td>Second Amended and Restated Multicurrency Revolving Credit Agreement, dated as of February 10, 2021, among the Company and certain of its subsidiaries, as Borrower, Toronto Dominion (Texas) LLC, as Administrative Agent and Swingline Lender, BofA Securities, Inc., TD Securities (USA) LLC, Mizuho Bank, Ltd., Barclays Bank PLC, Citibank, N.A., JPMorgan Chase Bank, N.A., RBC Capital Markets and Morgan Stanley MUFG Loan Partners, LLC, as Joint Lead Arrangers and Joint Bookrunners, Mizuho Bank, Ltd., as Syndication Agent, and BofA Securities, Inc., Barclays Bank PLC, Citibank, N.A., JPMorgan Chase Bank, N.A., Royal Bank of Canada and Morgan Stanley MUFG Loan Partners, LLC, as Co-Documentation Agents</td><td>Filed herewith as Exhibit 10.29</td><td>—</td><td>—</td><td>—</td></tr><tr><td>10.30</td><td>Third Amended and Restated Revolving Credit Agreement, dated as of February 10, 2021, among the Company, as Borrower, Toronto Dominion (Texas) LLC, as Administrative Agent and Swingline Lender, BofA Securities, Inc., TD Securities (USA) LLC, Mizuho Bank, Ltd., Barclays Bank PLC, Citibank, N.A., JPMorgan Chase Bank, N.A., RBC Capital Markets and Morgan Stanley MUFG Loan Partners, LLC, as Joint Lead Arrangers and Joint Bookrunners, Mizuho Bank, Ltd., as Syndication Agent, and BofA Securities, Inc., Barclays Bank PLC, Citibank, N.A., JPMorgan Chase Bank, N.A., Royal Bank of Canada and Morgan Stanley MUFG Loan Partners, LLC, as Co-Documentation Agents</td><td>Filed herewith as Exhibit 10.30</td><td>—</td><td>—</td><td>—</td></tr></table>



<table><tr><td>Exhibit No.</td><td>Description of Document</td><td>Form</td><td>File No.</td><td>Date of Filing</td><td>Exhibit No.</td></tr><tr><td>10.31</td><td>Eighth Amendment to Term Loan Agreement, dated as of December 20, 2019, providing for the Amended and Restated Term Loan Agreement, dated as of December 20, 2019, among the Company, as Borrower, Mizuho Bank, Ltd., as Administrative Agent; TD Securities (USA) LLC, as Syndication Agent, Bank of America, N.A., Barclays Bank PLC, Citibank, N.A., JPMorgan Chase Bank, N.A., Morgan Stanley MUFG Loan Partners, LLC and Royal Bank of Canada as Co-Documentation Agents, Mizuho Bank, Ltd., TD Securities (USA) LLC, Barclays Bank PLC, BofA Securities, Inc., Citibank, N.A., JPMorgan Chase Bank, N.A., Morgan Stanley MUFG Loan Partners, LLC and RBC Capital Markets as Joint Lead Arrangers and Joint Bookrunners, and the several other lenders that are parties thereto</td><td>10-K</td><td>001-14195</td><td>February 25, 2020</td><td>10.30</td></tr><tr><td>10.32</td><td>First Amendment to Term Loan Agreement, dated as of February 10, 2021, among the Company, as Borrower, Mizuho Bank, Ltd., as Administrative Agent, and certain other lenders under the Company&#x27;s Amended and Restated Term Loan Agreement, dated as of December 20, 2019</td><td>Filed herewith as Exhibit 10.32</td><td>—</td><td>—</td><td>—</td></tr><tr><td>10.33</td><td>Master Agreement, dated as of February 5, 2015, among the Company and Verizon Communications Inc.</td><td>10-K</td><td>001-14195</td><td>February 24, 2015</td><td>10.45</td></tr><tr><td>10.34</td><td>Master Prepaid Lease, dated as of March 27, 2015, among certain subsidiaries of the Company and Verizon Communications Inc.</td><td>10-Q</td><td>001-14195</td><td>April 30, 2015</td><td>10.8</td></tr><tr><td>10.35</td><td>Sale Site Master Lease Agreement, dated as of March 27, 2015, among certain subsidiaries of the Company, Verizon Communications Inc. and certain of its subsidiaries</td><td>10-Q</td><td>001-14195</td><td>April 30, 2015</td><td>10.9</td></tr><tr><td>10.36</td><td>MPL Site Master Lease Agreement, dated as of March 27, 2015, among Verizon Communications Inc. and certain of its subsidiaries and ATC Sequoia LLC</td><td>10-Q</td><td>001-14195</td><td>April 30, 2015</td><td>10.10</td></tr><tr><td>10.37</td><td>Management Agreement, dated as of March 27, 2015, among Verizon Communications Inc., and certain of its subsidiaries and ATC Sequoia LLC</td><td>10-Q</td><td>001-14195</td><td>April 30, 2015</td><td>10.11</td></tr><tr><td>10.38</td><td>Shareholders Agreement, dated as of October 21, 2015, by and amongst Vion Networks Limited, Tata Sons Limited, Tata Teleservices Limited, IDFC Private Equity Fund III, Macquarie SBI Infrastructure Investments Pte Limited, SBI Macquarie Infrastructure Trust and ATC Asia Pacific Pte. Ltd.</td><td>10-K</td><td>001-14195</td><td>February 26, 2016</td><td>10.53</td></tr><tr><td>10.39</td><td>Securities Purchase Agreement, dated as of November 4, 2020, by and among IWG Holdings, LLC, American Tower Investments LLC and IWG Rep., LLC</td><td>Filed herewith as Exhibit 10.39</td><td>—</td><td>—</td><td>—</td></tr><tr><td>10.40</td><td>First Amendment to Securities Purchase Agreement, dated as of December 22, 2020, by and among IWG Holdings, LLC, American Tower Investments LLC and IWG Rep., LLC</td><td>Filed herewith as Exhibit 10.40</td><td>—</td><td>—</td><td>—</td></tr></table>



<table><tr><td>Exhibit No.</td><td>Description of Document</td><td>Form</td><td>File No.</td><td>Date of Filing</td><td>Exhibit No.</td></tr><tr><td>10.41</td><td>Agreement For the Sale and Purchase of the Towers Europe Division of Telxius Telecom, S.A., dated as of January 13, 2021, between Telxius Telecom, S.A. and American Tower International, Inc.</td><td>Filed herewith as Exhibit 10.41</td><td>—</td><td>—</td><td>—</td></tr><tr><td>10.42</td><td>Agreement For the Sale and Purchase of the Towers LatAm Division of Telxius Telecom, S.A., dated as of January 13, 2021, between Telxius Telecom, S.A. and American Tower International, Inc.</td><td>Filed herewith as Exhibit 10.42</td><td>—</td><td>—</td><td>—</td></tr><tr><td>10.43</td><td>Commitment Letter, dated as of January 13, 2021, among the Company, Bank of America, N.A. and BofA Securities, Inc.</td><td>Filed herewith as Exhibit 10.43</td><td>—</td><td>—</td><td>—</td></tr><tr><td>10.44</td><td>364-Day Term Loan Agreement, dated as of February 10, 2021, among the Company, as Borrower, Bank of America, N.A., as Administrative Agent, TD Securities (USA), LLC and Mizuho Bank, Ltd. as Syndication Agents, BofA Securities, Inc., TD Securities (USA), LLC, Mizuho Bank, Ltd., Barclays Bank PLC, Citibank, N.A., JPMorgan Chase Bank, N.A., RBC Capital Markets and Morgan Stanley MUFG Loan Partners, LLC as Joint Lead Arrangers and Joint Bookrunners, and Barclays Bank PLC, Citibank, N.A., JPMorgan Chase Bank, N.A., Royal Bank of Canada and Morgan Stanley MUFG Loan Partners, LLC, as Co-Documentation Agents</td><td>Filed herewith as Exhibit 10.44</td><td>—</td><td>—</td><td>—</td></tr><tr><td>10.45</td><td>3-Year Term Loan Agreement, dated as of February 10, 2021, among the Company, as Borrower, Bank of America, N.A., as Administrative Agent, TD Securities (USA), LLC and Mizuho Bank, Ltd. as Syndication Agents, BofA Securities, Inc., TD Securities (USA), LLC, Mizuho Bank, Ltd., Barclays Bank PLC, Citibank, N.A., JPMorgan Chase Bank, N.A., RBC Capital Markets and Morgan Stanley MUFG Loan Partners, LLC as Joint Lead Arrangers and Joint Bookrunners, and Barclays Bank PLC, Citibank, N.A., JPMorgan Chase Bank, N.A., Royal Bank of Canada and Morgan Stanley MUFG Loan Partners, LLC, as Co-Documentation Agents</td><td>Filed herewith as Exhibit 10.45</td><td>—</td><td>—</td><td>—</td></tr><tr><td>21</td><td>Subsidiaries of the Company</td><td>Filed herewith as Exhibit 21</td><td>—</td><td>—</td><td>—</td></tr><tr><td>23</td><td>Consent of Independent Registered Public Accounting Firm—Deloitte &amp; Touche LLP</td><td>Filed herewith as Exhibit 23</td><td>—</td><td>—</td><td>—</td></tr><tr><td>31.1</td><td>Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002</td><td>Filed herewith as Exhibit 31.1</td><td>—</td><td>—</td><td>—</td></tr></table>



<table><tr><td rowspan="2">Exhibit No.</td><td rowspan="2">Description of Document</td><td colspan="4">Incorporated By Reference</td></tr><tr><td>Form</td><td>File No.</td><td>Date of Filing</td><td>Exhibit No.</td></tr><tr><td>31.2</td><td>Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002</td><td>Filed herewith as Exhibit 31.2</td><td>—</td><td>—</td><td>—</td></tr><tr><td>32</td><td>Certifications filed pursuant to 18. U.S.C. Section 1350</td><td>Filed herewith as Exhibit 32</td><td>—</td><td>—</td><td>—</td></tr><tr><td>101</td><td>The following materials from American Tower Corporation&#x27;s Annual Report on Form 10-K for the year ended December 31, 2020, formatted in XBRL (Extensible Business Reporting Language):</td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>101.SCH—Inline XBRL Taxonomy Extension Schema Document</td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>101.CAL—Inline XBRL Taxonomy Extension Calculation Linkbase Document</td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>101.LAB—Inline XBRL Taxonomy Extension Label Linkbase Document</td><td></td><td></td><td></td><td></td></tr><tr><td></td><td>101.PRE—Inline XBRL Taxonomy Extension Presentation Linkbase Document</td><td>Filed herewith as Exhibit 101</td><td>—</td><td>—</td><td>—</td></tr><tr><td>104</td><td>Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)</td><td></td><td></td><td></td><td></td></tr></table>

* Management contracts and compensatory plans and arrangements required to be filed as exhibits to this Form 10-K pursuant to Item 15(a)(3).

** The exhibit has been filed separately with the Commission pursuant to an application for confidential treatment. The confidential portions of the exhibit have been omitted and are marked by an asterisk.

## ITEM 16. FORM 10-K SUMMARY

None.



## SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on the 25th day of February, 2021.

AMERICAN TOWER CORPORATION

By: /s/ THOMAS A. BARTLETT

Thomas A. Bartlett
President and Chief Executive Officer



Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been duly signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

<table><tr><td>Signature</td><td>Title</td><td>Date</td></tr><tr><td>/S/ THOMAS A. BARTLETT</td><td>President and Chief Executive Officer (Principal Executive Officer), Director</td><td>February 25, 2021</td></tr><tr><td>Thomas A. Bartlett</td><td></td><td></td></tr><tr><td>/S/ RODNEY M. SMITH</td><td>Executive Vice President, Chief Financial Officer and Treasurer (Principal Financial Officer)</td><td>February 25, 2021</td></tr><tr><td>Rodney M. Smith</td><td></td><td></td></tr><tr><td>/S/ ROBERT J. MEYER, JR</td><td>Senior Vice President and Chief Accounting Officer (Principal Accounting Officer)</td><td>February 25, 2021</td></tr><tr><td>Robert J. Meyer, Jr.</td><td></td><td></td></tr><tr><td>/S/ RAYMOND P. DOLAN</td><td>Director</td><td>February 25, 2021</td></tr><tr><td>Raymond P. Dolan</td><td></td><td></td></tr><tr><td>/S/ KENNETH R. FRANK</td><td>Director</td><td>February 25, 2021</td></tr><tr><td>Kenneth R. Frank</td><td></td><td></td></tr><tr><td>/S/ ROBERT D. HORMATS</td><td>Director</td><td>February 25, 2021</td></tr><tr><td>Robert D. Hormats</td><td></td><td></td></tr><tr><td>/S/ GUSTAVO LARA CANTU</td><td>Director</td><td>February 25, 2021</td></tr><tr><td>Gustavo Lara Cantu</td><td></td><td></td></tr><tr><td>/S/ GRACE D. LIEBLEIN</td><td>Director</td><td>February 25, 2021</td></tr><tr><td>Grace D. Lieblein</td><td></td><td></td></tr><tr><td>/S/ CRAIG MACNAB</td><td>Director</td><td>February 25, 2021</td></tr><tr><td>Craig Macnab</td><td></td><td></td></tr><tr><td>/S/ JOANN A. REED</td><td>Director</td><td>February 25, 2021</td></tr><tr><td>JoAnn A. Reed</td><td></td><td></td></tr><tr><td>/S/ PAMELA D. A. REEVE</td><td>Chair of the Board, Director</td><td>February 25, 2021</td></tr><tr><td>Pamela D. A. Reeve</td><td></td><td></td></tr><tr><td>/S/ DAVID E. SHARBUTT</td><td>Director</td><td>February 25, 2021</td></tr><tr><td>David E. Sharbutt</td><td></td><td></td></tr><tr><td>/S/ BRUCE L. TANNER</td><td>Director</td><td>February 25, 2021</td></tr><tr><td>Bruce L. Tanner</td><td></td><td></td></tr><tr><td>/S/ SAMME L. THOMPSON</td><td>Director</td><td>February 25, 2021</td></tr><tr><td>Samme L. Thompson</td><td></td><td></td></tr></table>



## AMERICAN TOWER CORPORATION AND SUBSIDIARIES
INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Page

Report of Independent Registered Public Accounting Firm 2

Consolidated Balance Sheets as of December 31, 2020 and 2019 5

Consolidated Statements of Operations for the Years Ended December 31, 2020, 2019 and 2018 6

Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2020, 2019 and 2018

Consolidated Statements of Equity for the Years Ended December 31, 2020, 2019 and 2018 8

Consolidated Statements of Cash Flows for the Years Ended December 31, 2020, 2019 and 2018

Notes to Consolidated Financial Statements 10



# REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of American Tower Corporation

## Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of American Tower Corporation and subsidiaries (the "Company") as of December 31, 2020 and 2019, the related consolidated statements of operations, comprehensive income, equity, and cash flows, for each of the three years in the period ended December 31, 2020, and the related notes and the schedule listed in the Index at Item 15 (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2020 and 2019, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2020, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 25, 2021, expressed an unqualified opinion on the Company's internal control over financial reporting.

## Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

## Critical Audit Matters

The critical audit matters communicated below are matters arising from the current-period audit of the financial statements that were communicated or required to be communicated to the audit committee and that (1) relate to accounts or disclosures that are material to the financial statements and (2) involved especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Revenue Recognition for Significant Contract Modifications - Refer to Notes 1 and 4 to the financial statements

## Critical Audit Matter Description

The Company’s contracts with major tenants are often governed by a master lease agreement that contains terms and provisions governing the tenant’s right to use the Company’s telecommunications sites and the land on which the sites are located (the “lease component”) and the tenant’s responsibility for reimbursement of various costs incurred by the Company in operating the telecommunications towers and supporting the tenant’s equipment as well as other services and contractual rights (the “non-lease components”). The master lease agreements contain both lease and non-lease components, may contain unusual or non-standard terms, and often pertain to many of the Company’s telecommunications sites. In the current year, the Company amended a master lease agreement with a major tenant.

Management of the Company exercised significant judgment in determining the appropriate revenue recognition for the amended master lease agreement, including the following:

- Determination of the lease and non-lease components and whether they should be accounted for as a combined lease component or separately.



- Determination of the stand-alone selling prices for each performance obligation in the master lease agreement if not accounted for with the lease component.

- Determination of the fixed and variable consideration in the master lease agreement, the impact of cancellation and renewal provisions, the estimated term of each of the individual contracts impacted by the master lease agreement, and the pattern of recognition for each lease component or performance obligation.

We identified the amended master lease agreement with a major tenant as a critical audit matter because the audit effort required to evaluate the Company’s judgments in determining the appropriate revenue recognition for the impact of a multi-faceted, complex master lease agreement entered into with the major tenant was extensive.

## How the Critical Audit Matter Was Addressed in the Audit

Our principal audit procedures related to the Company’s amended master lease agreement with the major tenant included the following:

- We tested the effectiveness of internal controls related to the Company’s process for evaluating the proper accounting for the master lease agreement.

- We evaluated the Company’s significant accounting policies related to the master lease agreement for reasonableness and compliance with the applicable accounting standards.

• We evaluated the master lease agreement and performed the following procedures:

• Obtained and evaluated the documents that were part of the overall master lease agreement.

- Tested the Company’s identification of the significant terms for completeness and accuracy, including the identification of the lease and non-lease components, cancellation and renewal provisions, estimated term and fixed and variable consideration.

- Assessed the terms and provisions in the master lease agreement and evaluated the appropriateness of the Company’s application of their accounting policies, along with their use of estimates, in the determination of revenue recognition conclusions.

- We tested the mathematical accuracy of the Company’s determination of revenue and the associated timing of revenue recognized in the financial statements.

## InSite Wireless Group, LLC Acquisition – Refer to Notes 1, 5 and 7 to the financial statements

## Critical Audit Matter Description

The Company completed the acquisition of InSite Wireless Group, LLC (“InSite”) for the total consideration of $3.5 billion on December 23, 2020. The Company accounted for the transaction with InSite under the acquisition method of accounting for business combinations. Accordingly, the purchase price was allocated on a preliminary basis to the assets acquired and liabilities assumed based on their respective fair values on the acquisition date including property, plant & equipment of $516 million, intangible assets of $1,783 million, income tax liabilities of $117 million and goodwill of $1,354 million. Of the identified intangible assets acquired, the most significant included tenant relationship intangible assets of $1,160 million and network location intangible assets of $623 million. The Company estimated the fair value of these two intangible assets using the multi-period excess earnings method, which is a discounted cash flow method that required the Company to make significant estimates and assumptions related to future cash flows, including those related to tenant growth and attrition rates, long-term growth rates, and discount rate.

We identified the tenant relationship and network location intangible assets for InSite as a critical audit matter because of the significant estimates and assumptions the Company makes to calculate fair value of these assets for purposes of recording the acquisition. This required a high degree of auditor judgment and an increased extent of effort when performing audit procedures to evaluate the reasonableness of the Company’s forecasts of future cash flows as well as the selection of the tenant growth and attrition rates, long-term growth rates and discount rates, including the need to involve our internal fair value specialists.

## How the Critical Audit Matter Was Addressed in the Audit

Our principal audit procedures related to the forecasts of future cash flows for the intangible assets and the selection of the tenant growth and attrition rates, long-term growth rates and discount rates included the following:



- We tested the effectiveness of controls over the purchase price allocation, including controls over the Company’s projections of future cash flows and the selection of tenant growth and attrition rates, long-term growth rates and discount rates utilized in determining the fair value of the intangible assets.

- We evaluated the reasonableness of the Company’s projections of future cash flows, including the selection of tenant growth and attrition rates by comparing the assumptions used in the projections to those of the in-place lease contracts assumed, external market sources, historical data of the Company’s similar contractual relationships, and results from other areas of the audit.

- With the assistance of our fair value specialists, we evaluated the reasonableness of the valuation methodology, long-term growth rates and discount rates by:

Testing the source information underlying the determination of the long-term growth rates and discount rates and testing the mathematical accuracy of the calculations.

Developing a range of independent estimates for the discount rate and comparing those to the discount rate selected by the Company.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

February 25, 2021

We have served as the Company's auditor since 1997.



## AMERICAN TOWER CORPORATION AND SUBSIDIARIES

## CONSOLIDATED BALANCE SHEETS
(in millions, except share count and per share data)

<table><tr><td></td><td>December 31, 2020</td><td>December 31, 2019</td></tr><tr><td>ASSETS</td><td></td><td></td></tr><tr><td>CURRENT ASSETS:</td><td></td><td></td></tr><tr><td>Cash and cash equivalents</td><td>$ 1,746.3</td><td>$ 1,501.2</td></tr><tr><td>Restricted cash</td><td>115.1</td><td>76.8</td></tr><tr><td>Accounts receivable, net</td><td>511.6</td><td>462.2</td></tr><tr><td>Prepaid and other current assets</td><td>532.6</td><td>513.6</td></tr><tr><td>Total current assets</td><td>2,905.6</td><td>2,553.8</td></tr><tr><td>PROPERTY AND EQUIPMENT, net</td><td>12,808.7</td><td>12,084.4</td></tr><tr><td>GOODWILL</td><td>7,282.7</td><td>6,178.3</td></tr><tr><td>OTHER INTANGIBLE ASSETS, net</td><td>13,839.8</td><td>12,318.4</td></tr><tr><td>DEFERRED TAX ASSET</td><td>123.1</td><td>131.8</td></tr><tr><td>DEFERRED RENT ASSET</td><td>2,084.3</td><td>1,771.1</td></tr><tr><td>RIGHT-OF-USE ASSET</td><td>7,789.2</td><td>7,357.4</td></tr><tr><td>NOTES RECEIVABLE AND OTHER NON-CURRENT ASSETS</td><td>400.1</td><td>406.4</td></tr><tr><td>TOTAL</td><td>$ 47,233.5</td><td>$ 42,801.6</td></tr><tr><td>LIABILITIES</td><td></td><td></td></tr><tr><td>CURRENT LIABILITIES:</td><td></td><td></td></tr><tr><td>Accounts payable</td><td>$ 139.1</td><td>$ 148.1</td></tr><tr><td>Accrued expenses</td><td>1,043.7</td><td>958.2</td></tr><tr><td>Distributions payable</td><td>544.6</td><td>455.0</td></tr><tr><td>Accrued interest</td><td>207.8</td><td>209.4</td></tr><tr><td>Current portion of operating lease liability</td><td>539.9</td><td>494.5</td></tr><tr><td>Current portion of long-term obligations</td><td>789.8</td><td>2,928.2</td></tr><tr><td>Unearned revenue</td><td>390.6</td><td>294.3</td></tr><tr><td>Total current liabilities</td><td>3,655.5</td><td>5,487.7</td></tr><tr><td>LONG-TERM OBLIGATIONS</td><td>28,497.7</td><td>21,127.2</td></tr><tr><td>OPERATING LEASE LIABILITY</td><td>6,884.4</td><td>6,510.4</td></tr><tr><td>ASSET RETIREMENT OBLIGATIONS</td><td>1,571.3</td><td>1,384.1</td></tr><tr><td>DEFERRED TAX LIABILITY</td><td>859.5</td><td>768.3</td></tr><tr><td>OTHER NON-CURRENT LIABILITIES</td><td>984.6</td><td>937.0</td></tr><tr><td>Total liabilities</td><td>42,453.0</td><td>36,214.7</td></tr><tr><td>COMMITMENTS AND CONTINGENCIES</td><td></td><td></td></tr><tr><td>REDEEMABLE NONCONTROLLING INTERESTS</td><td>212.1</td><td>1,096.5</td></tr><tr><td>EQUITY (shares in thousands):</td><td></td><td></td></tr><tr><td>Common stock: $0.01 par value; 1,000,000 shares authorized; 455,245 and 453,541 shares issued; and 444,330 and 442,890 shares outstanding, respectively</td><td>4.6</td><td>4.5</td></tr><tr><td>Additional paid-in capital</td><td>10,473.7</td><td>10,117.7</td></tr><tr><td>Distributions in excess of earnings</td><td>(1,343.0)</td><td>(1,016.8)</td></tr><tr><td>Accumulated other comprehensive loss</td><td>(3,759.4)</td><td>(2,823.6)</td></tr><tr><td>Treasury stock (10,915 and 10,651 shares at cost, respectively)</td><td>(1,282.4)</td><td>(1,226.4)</td></tr><tr><td>Total American Tower Corporation equity</td><td>4,093.5</td><td>5,055.4</td></tr><tr><td>Noncontrolling interests</td><td>474.9</td><td>435.0</td></tr><tr><td>Total equity</td><td>4,568.4</td><td>5,490.4</td></tr><tr><td>TOTAL</td><td>$ 47,233.5</td><td>$ 42,801.6</td></tr></table>

See accompanying notes to consolidated financial statements.



## AMERICAN TOWER CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS
(in millions, except share and per share data)

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td>2018</td><td></td></tr><tr><td>REVENUES:</td><td></td><td></td><td></td><td></td></tr><tr><td>Property</td><td>$ 7,953.6</td><td>$ 7,464.9</td><td>$ 7,314.7</td><td></td></tr><tr><td>Services</td><td>87.9</td><td>115.4</td><td>125.4</td><td></td></tr><tr><td>Total operating revenues</td><td>8,041.5</td><td>7,580.3</td><td>7,440.1</td><td></td></tr><tr><td>OPERATING EXPENSES:</td><td></td><td></td><td></td><td></td></tr><tr><td>Costs of operations (exclusive of items shown separately below):</td><td></td><td></td><td></td><td></td></tr><tr><td>Property</td><td>2,189.6</td><td>2,173.7</td><td>2,128.7</td><td></td></tr><tr><td>Services</td><td>37.6</td><td>43.1</td><td>49.1</td><td></td></tr><tr><td>Depreciation, amortization and accretion</td><td>1,882.3</td><td>1,778.4</td><td>2,110.8</td><td></td></tr><tr><td>Selling, general, administrative and development expense</td><td>778.7</td><td>730.4</td><td>733.2</td><td></td></tr><tr><td>Other operating expenses</td><td>265.8</td><td>166.3</td><td>513.3</td><td></td></tr><tr><td>Total operating expenses</td><td>5,154.0</td><td>4,891.9</td><td>5,535.1</td><td></td></tr><tr><td>OPERATING INCOME</td><td>2,887.5</td><td>2,688.4</td><td>1,905.0</td><td></td></tr><tr><td>OTHER INCOME (EXPENSE):</td><td></td><td></td><td></td><td></td></tr><tr><td>Interest expense, TV Azteca</td><td>—</td><td>—</td><td>(0.1)</td><td></td></tr><tr><td>Interest income</td><td>39.7</td><td>46.8</td><td>54.7</td><td></td></tr><tr><td>Interest expense</td><td>(793.5)</td><td>(814.2)</td><td>(825.5)</td><td></td></tr><tr><td>Loss on retirement of long-term obligations</td><td>(71.8)</td><td>(22.2)</td><td>(3.3)</td><td></td></tr><tr><td>Other (expense) income (including foreign currency (losses) gains of $ (216.4), $6.1, and $ (4.5), respectively)</td><td>(240.8)</td><td>17.6</td><td>23.8</td><td></td></tr><tr><td>Total other expense</td><td>(1,066.4)</td><td>(772.0)</td><td>(750.4)</td><td></td></tr><tr><td>INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES</td><td>1,821.1</td><td>1,916.4</td><td>1,154.6</td><td></td></tr><tr><td>Income tax (provision) benefit</td><td>(129.6)</td><td>0.2</td><td>110.1</td><td></td></tr><tr><td>NET INCOME</td><td>1,691.5</td><td>1,916.6</td><td>1,264.7</td><td></td></tr><tr><td>Net income attributable to noncontrolling interests</td><td>(0.9)</td><td>(28.8)</td><td>(28.3)</td><td></td></tr><tr><td>NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION STOCKHOLDERS</td><td>1,690.6</td><td>1,887.8</td><td>1,236.4</td><td></td></tr><tr><td>Dividends on preferred stock</td><td>—</td><td>—</td><td>(9.4)</td><td></td></tr><tr><td>NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS</td><td>$ 1,690.6</td><td>$ 1,887.8</td><td>$ 1,227.0</td><td></td></tr><tr><td>NET INCOME PER COMMON SHARE AMOUNTS:</td><td></td><td></td><td></td><td></td></tr><tr><td>Basic net income attributable to American Tower Corporation common stockholders</td><td>$ 3.81</td><td>$ 4.27</td><td>$ 2.79</td><td></td></tr><tr><td>Diluted net income attributable to American Tower Corporation common stockholders</td><td>$ 3.79</td><td>$ 4.24</td><td>$ 2.77</td><td></td></tr><tr><td>WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (in thousands):</td><td></td><td></td><td></td><td></td></tr><tr><td>BASIC</td><td>443,640</td><td>442,319</td><td>439,606</td><td></td></tr><tr><td>DILUTED</td><td>446,104</td><td>445,520</td><td>442,960</td><td></td></tr></table>

See accompanying notes to consolidated financial statements.



## AMERICAN TOWER CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
(in millions)

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td>2018</td><td></td></tr><tr><td>Net income</td><td>$ 1,691.5</td><td>$ 1,916.6</td><td>$ 1,264.7</td><td></td></tr><tr><td>Other comprehensive (loss) income:</td><td></td><td></td><td></td><td></td></tr><tr><td>Changes in fair value of cash flow hedges, each net of tax expense of $0</td><td>(0.2)</td><td>(0.1)</td><td>(0.1)</td><td></td></tr><tr><td>Reclassification of unrealized losses on cash flow hedges to net income, each net of tax expense of $0</td><td>0.3</td><td>0.2</td><td>0.3</td><td></td></tr><tr><td>Adjustment to redeemable noncontrolling interest</td><td>—</td><td>—</td><td>78.8</td><td></td></tr><tr><td>Purchase of noncontrolling interest</td><td>—</td><td>—</td><td>0.5</td><td></td></tr><tr><td>Foreign currency translation adjustments, net of tax expense (benefit) of $0.0, $0.5, and $(2.6), respectively.</td><td>(701.5)</td><td>(157.9)</td><td>(869.3)</td><td></td></tr><tr><td>Other comprehensive loss</td><td>(701.4)</td><td>(157.8)</td><td>(789.8)</td><td></td></tr><tr><td>Comprehensive income</td><td>990.1</td><td>1,758.8</td><td>474.9</td><td></td></tr><tr><td>Comprehensive (income) loss attributable to noncontrolling interests</td><td>(26.1)</td><td>3.8</td><td>96.9</td><td></td></tr><tr><td>Allocation of accumulated other comprehensive income resulting from purchases of noncontrolling interests and redeemable noncontrolling interest</td><td>(209.2)</td><td>(55.5)</td><td>—</td><td></td></tr><tr><td>Comprehensive income attributable to American Tower Corporation stockholders</td><td>$ 754.8</td><td>$ 1,707.1</td><td>$ 571.8</td><td></td></tr></table>

See accompanying notes to consolidated financial statements.



AMERICAN TOWER CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF EQUITY
(in millions, share counts in thousands)

<table><tr><td rowspan="2"></td><td colspan="3">Preferred Stock-Acquired Share-B</td><td colspan="3">Common Stock</td><td colspan="3">Additional Paid-In Capital</td><td colspan="3">Accumulated Other Comprehensive Income</td><td rowspan="2">Total Equity</td></tr><tr><td>Shares</td><td>Amount</td><td>Issued</td><td>Shares</td><td>Amount</td><td>Shares</td><td>Amount</td><td>Shares</td><td>Amount</td><td>Shares</td><td>Amount</td><td></td></tr><tr><td>BALANCE, JANUARY 1, 2018</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Stock-based compensation related activity</td><td>1,375</td><td>0.00</td><td>453,729</td><td>44</td><td>(8,390)</td><td>5</td><td>(9,740)</td><td>5</td><td>1,904</td><td>0.02</td><td></td><td></td><td></td></tr><tr><td>Issuance of preferred stock - stock purchase plan</td><td></td><td></td><td>1,782</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Treasury stock activity</td><td></td><td></td><td>86</td><td></td><td>0.00</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Changes in fair value of cash flow hedges, net of tax</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Recorded cumulative translation adjustments, net of tax</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Foreign currency translation adjustments, net of tax</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Adjustments to noncontrolling membership interests</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Purchase of investment opportunity interest</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Impact of revenue recognition standard adoption</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Recorded stock dividends declared</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Interest expense</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>BALANCE, DECEMBER 31, 2018</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Issuance of stock-based compensation stock activity plan</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Stock-based compensation stock acquired plan</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Changes in fair value of cash flow hedges, net of tax</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Changes in fair value of investment opportunity interest</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Distributions to noncontrolling interests</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Distributions to noncontrolling interests</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Reclassifications to noncontrolling interests</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Reclassification of redeemable noncontrolling interests</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Common stock distributed to shareholders</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income of less than accumulating standard adoption</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net income</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>BALANCE, DECEMBER 31, 2019</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Issuance of stock-based compensation stock activity plan</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Issuance of stock - stock purchase plan</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Changes in fair value of cash flow hedges, net of tax</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Changes in fair value of investment opportunity interest</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Distributions to noncontrolling interests</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Distributions to noncontrolling interests</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Purchase of investment opportunity interest</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Purchase of investment opportunity interest</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income of less than accumulating standard adoption</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net income</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>BALANCE, DECEMBER 31, 2020</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Issuance of stock-based compensation stock activity plan</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Issuance of stock - stock purchase plan</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Changes in fair value of cash flow hedges, net of tax</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Changes in fair value of investment opportunity interest</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Distributions to noncontrolling interests</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Distributions to noncontrolling interests</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Purchase of investment opportunity interest</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Purchase of investment opportunity interest</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Income of less than accumulating standard adoption</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net income</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>BALANCE, DECEMBER 31, 2020</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr></table>



## AMERICAN TOWER CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td>2018</td><td></td></tr><tr><td>CASH FLOWS FROM OPERATING ACTIVITIES</td><td></td><td></td><td></td><td></td></tr><tr><td>Net income</td><td>$ 1,691.5</td><td>$ 1,916.6</td><td>$ 1,264.7</td><td></td></tr><tr><td>Adjustments to reconcile net income to cash provided by operating activities:</td><td></td><td></td><td></td><td></td></tr><tr><td>Depreciation, amortization and accretion</td><td>1,882.3</td><td>1,778.4</td><td>2,110.8</td><td></td></tr><tr><td>Stock-based compensation expense</td><td>120.8</td><td>111.4</td><td>137.5</td><td></td></tr><tr><td>Loss on investments, unrealized foreign currency loss and other non-cash expense</td><td>299.6</td><td>46.2</td><td>47.3</td><td></td></tr><tr><td>Impairments, net loss on sale of long-lived assets, non-cash restructuring and merger related expenses</td><td>239.5</td><td>140.0</td><td>479.6</td><td></td></tr><tr><td>Loss on early retirement of long-term obligations</td><td>71.8</td><td>22.2</td><td>3.3</td><td></td></tr><tr><td>Amortization of deferred financing costs, debt discounts and premiums and other non-cash interest</td><td>32.9</td><td>25.9</td><td>22.1</td><td></td></tr><tr><td>Deferred income taxes</td><td>(22.5)</td><td>(55.1)</td><td>(303.0)</td><td></td></tr><tr><td>Changes in assets and liabilities, net of acquisitions:</td><td></td><td></td><td></td><td></td></tr><tr><td>Accounts receivable</td><td>(175.5)</td><td>12.5</td><td>(32.1)</td><td></td></tr><tr><td>Prepaid and other assets</td><td>84.4</td><td>(67.6)</td><td>(101.7)</td><td></td></tr><tr><td>Deferred rent asset</td><td>(322.0)</td><td>(183.5)</td><td>(87.6)</td><td></td></tr><tr><td>Right-of-use asset and Operating lease liability, net</td><td>(10.9)</td><td>17.4</td><td>—</td><td></td></tr><tr><td>Accounts payable and accrued expenses</td><td>(69.2)</td><td>(46.8)</td><td>69.3</td><td></td></tr><tr><td>Accrued interest</td><td>(1.8)</td><td>32.4</td><td>8.4</td><td></td></tr><tr><td>Unearned revenue</td><td>60.7</td><td>2.5</td><td>85.8</td><td></td></tr><tr><td>Deferred rent liability</td><td>—</td><td>—</td><td>57.9</td><td></td></tr><tr><td>Other non-current liabilities</td><td>(0.2)</td><td>0.1</td><td>(14.0)</td><td></td></tr><tr><td>Cash provided by operating activities</td><td>3,881.4</td><td>3,752.6</td><td>3,748.3</td><td></td></tr><tr><td>CASH FLOWS FROM INVESTING ACTIVITIES</td><td></td><td></td><td></td><td></td></tr><tr><td>Payments for purchase of property and equipment and construction activities</td><td>(1,031.7)</td><td>(991.3)</td><td>(913.2)</td><td></td></tr><tr><td>Payments for acquisitions, net of cash acquired</td><td>(3,799.1)</td><td>(2,959.6)</td><td>(1,881.4)</td><td></td></tr><tr><td>Proceeds from sales of short-term investments and other non-current assets</td><td>19.6</td><td>383.5</td><td>1,252.2</td><td></td></tr><tr><td>Payments for short-term investments</td><td>—</td><td>(355.9)</td><td>(1,154.3)</td><td></td></tr><tr><td>Deposits and other</td><td>26.6</td><td>(64.2)</td><td>(52.8)</td><td></td></tr><tr><td>Cash used for investing activities</td><td>(4,784.6)</td><td>(3,987.5)</td><td>(2,749.5)</td><td></td></tr><tr><td>CASH FLOWS FROM FINANCING ACTIVITIES</td><td></td><td></td><td></td><td></td></tr><tr><td>Borrowings under credit facilities</td><td>8,230.4</td><td>5,750.0</td><td>3,263.3</td><td></td></tr><tr><td>Proceeds from issuance of senior notes, net</td><td>7,925.1</td><td>4,876.7</td><td>584.9</td><td></td></tr><tr><td>Proceeds from term loans</td><td>1,940.0</td><td>1,300.0</td><td>1,500.0</td><td></td></tr><tr><td>Proceeds from issuance of securities in securitization transaction</td><td>—</td><td>—</td><td>500.0</td><td></td></tr><tr><td>Repayments of notes payable, credit facilities, term loans, senior notes, secured debt, finance leases and capital leases</td><td>(13,875.4)</td><td>(9,225.3)</td><td>(4,884.8)</td><td></td></tr><tr><td>Distributions to noncontrolling interest holders, net</td><td>(12.3)</td><td>(11.8)</td><td>(14.4)</td><td></td></tr><tr><td>Purchases of common stock</td><td>(56.0)</td><td>(19.6)</td><td>(232.8)</td><td></td></tr><tr><td>Proceeds from stock options and employee stock purchase plan</td><td>98.1</td><td>105.5</td><td>98.9</td><td></td></tr><tr><td>Distributions paid on common stock</td><td>(1,928.2)</td><td>(1,603.0)</td><td>(1,323.5)</td><td></td></tr><tr><td>Distributions paid on preferred stock</td><td>—</td><td>—</td><td>(18.9)</td><td></td></tr><tr><td>Payment for early retirement of long-term obligations</td><td>(68.2)</td><td>(21.0)</td><td>(3.3)</td><td></td></tr><tr><td>Deferred financing costs and other financing activities</td><td>(176.5)</td><td>(135.6)</td><td>(56.6)</td><td></td></tr><tr><td>Purchases of redeemable noncontrolling interests</td><td>(861.7)</td><td>(425.7)</td><td>—</td><td></td></tr><tr><td>Purchase of noncontrolling interest</td><td>—</td><td>(68.5)</td><td>(20.5)</td><td></td></tr><tr><td>Cash provided by (used for) financing activities</td><td>1,215.3</td><td>521.7</td><td>(607.7)</td><td></td></tr><tr><td>Net effect of changes in foreign currency exchange rates on cash and cash equivalents, and restricted cash</td><td>(28.7)</td><td>(13.7)</td><td>(41.1)</td><td></td></tr><tr><td>NET INCREASE IN CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH</td><td>283.4</td><td>273.1</td><td>350.0</td><td></td></tr><tr><td>CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH, BEGINNING OF YEAR</td><td>1,578.0</td><td>1,304.9</td><td>954.9</td><td></td></tr><tr><td>CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH, END OF YEAR</td><td>$ 1,861.4</td><td>$ 1,578.0</td><td>$ 1,304.9</td><td></td></tr></table>

See accompanying notes to consolidated financial statements.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

## 1. BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Business—American Tower Corporation (together with its subsidiaries, “ATC” or the “Company”) is one of the largest global real estate investment trusts and a leading independent owner, operator and developer of multitenant communications real estate. The Company’s primary business is the leasing of space on communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. The Company refers to this business as its property operations. Additionally, the Company offers tower-related services in the United States, which the Company refers to as its services operations. These services include site application, zoning and permitting (“AZP”) and structural analysis, which primarily support the Company’s site leasing business, including the addition of new tenants and equipment on its sites.

The Company’s portfolio primarily consists of towers that it owns and towers that it operates pursuant to long-term lease arrangements, as well as distributed antenna system (“DAS”) networks, which provide seamless coverage solutions in certain in-building and outdoor wireless environments. In addition to the communications sites in its portfolio, the Company manages rooftop and tower sites for property owners under various contractual arrangements. The Company also holds other telecommunications infrastructure, fiber and property interests that it leases primarily to communications service providers and third-party tower operators.

American Tower Corporation is a holding company that conducts its operations through its directly and indirectly owned subsidiaries and joint ventures. ATC’s principal domestic operating subsidiaries are American Towers LLC and SpectraSite Communications, LLC. ATC conducts its international operations primarily through its subsidiary, American Tower International, Inc., which in turn conducts operations through its various international holding and operating subsidiaries and joint ventures.

The Company operates as a real estate investment trust for U.S. federal income tax purposes (“REIT”). Accordingly, the Company generally is not required to pay U.S. federal income taxes on income generated by its REIT operations, including the income derived from leasing space on its towers, as it receives a dividends paid deduction for distributions to stockholders that generally offsets its REIT income and gains. However, the Company remains obligated to pay U.S. federal income taxes on earnings from its domestic taxable REIT subsidiaries (“TRSs”). In addition, the Company’s international assets and operations, regardless of their classification for U.S. tax purposes, continue to be subject to taxation in the jurisdictions where those assets are held or those operations are conducted.

The use of TRSs enables the Company to continue to engage in certain businesses and jurisdictions while complying with REIT qualification requirements. The Company may, from time to time, change the election of previously designated TRSs to be included as part of the REIT. As of December 31, 2020, the Company’s REIT-qualified businesses included its U.S. tower leasing business and a majority of its U.S. indoor DAS networks business and services segment, as well as most of its operations in Mexico, Germany, Costa Rica, Nigeria, France, Canada and Australia.

Principles of Consolidation and Basis of Presentation—The accompanying consolidated financial statements include the accounts of the Company and those entities in which it has a controlling interest. Investments in entities that the Company does not control are accounted for using the equity method or as investments in equity securities, depending upon the Company’s ability to exercise significant influence over operating and financial policies. All intercompany accounts and transactions have been eliminated. As of December 31, 2020, the Company holds (i) a 51% controlling interest in ATC Europe B.V. (“ATC Europe”), a joint venture that primarily consists of the Company’s operations in France, Germany and Poland (PGGM holds a 49% noncontrolling interest) and (ii) a 92% controlling interest in ATC Telecom Infrastructure Private Limited (“ATC TIPL”), formerly Viom Networks Limited (“Viom”), in India (the remaining shareholders, as discussed in note 15, hold a 8% noncontrolling interest).

During the year ended December 31, 2020, the Company completed the acquisition of MTN Group Limited’s (“MTN”) 49% redeemable noncontrolling interests in each of the Company’s joint ventures in Ghana and Uganda for total consideration of approximately $524.4 million, including a net adjustment of $1.4 million made during the three months ended March 31, 2020, which resulted in an increase in the Company’s controlling interests in such joint ventures from 51% to 100%. The purchase is reflected in the consolidated statements of equity as increases of $142.2 million in each of Additional Paid-in Capital and Accumulated Other Comprehensive Loss and in the consolidated balance sheets as a reduction of $524.4 million in Redeemable noncontrolling interests.

Reportable Segments— During the fourth quarter of 2020, as a result of the Company’s acquisition of InSite Wireless Group, LLC (“InSite,” and the acquisition, the “InSite Acquisition”), the Company updated its reportable segments to rename U.S.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

property and Asia property to U.S. & Canada property and Asia-Pacific property, respectively. The Company continues to report its results in six segments – U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property and services, which are discussed further in note 21. The change in reportable segment names is solely reflective of the inclusion of Canada and Australia in the Company’s business operations, as a result of the InSite Acquisition, and had no impact on the Company’s consolidated financial statements for any prior periods. Historical financial information included in this Annual Report on Form 10-K has not been adjusted.

Significant Accounting Policies and Use of Estimates—The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“GAAP”) requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results may differ from those estimates, and such differences could be material to the accompanying consolidated financial statements. The significant estimates in the accompanying consolidated financial statements include impairment of long-lived assets (including goodwill), asset retirement obligations, revenue recognition, rent expense and lease accounting, income taxes and accounting for business combinations and acquisitions of assets. The Company considers events or transactions that occur after the balance sheet date but before the financial statements are issued as additional evidence for certain estimates or to identify matters that require additional disclosure.

Accounts Receivable and Deferred Rent Asset—The Company derives the largest portion of its revenues and corresponding accounts receivable and the related deferred rent asset from a relatively small number of tenants in the telecommunications industry, and 55% of its current-year revenues are derived from three tenants.

The Company’s deferred rent asset is associated with non-cancellable tenant leases that contain fixed escalation clauses over the terms of the applicable lease in which revenue is recognized on a straight-line basis over the lease term.

The Company mitigates its concentrations of credit risk with respect to notes and trade receivables and the related deferred rent assets by actively monitoring the creditworthiness of its borrowers and tenants. In recognizing tenant revenue, the Company assesses the collectibility of both the amounts billed and the portion recognized in advance of billing on a straight-line basis. This assessment takes tenant credit risk and business and industry conditions into consideration to ultimately determine the collectibility of the amounts billed. To the extent the amounts, based on management’s estimates, may not be collectible, revenue recognition is deferred until such point as collectibility is determined to be reasonably assured. Any amounts that were previously recognized as revenue and subsequently determined to be uncollectible are charged to bad debt expense included in Selling, general, administrative and development expense in the accompanying consolidated statements of operations.

Accounts receivable is reported net of allowances for doubtful accounts related to estimated losses resulting from a tenant’s inability to make required payments and allowances for amounts invoiced whose collectibility is not reasonably assured. These allowances are generally estimated based on payment patterns, days past due and collection history, and incorporate changes in economic conditions that may not be reflected in historical trends, such as tenants in bankruptcy, liquidation or reorganization. Receivables are written-off against the allowances when they are determined to be uncollectible. Such determination includes analysis and consideration of the particular conditions of the account. Changes in the allowances were as follows:

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020 (1)</td><td>2019</td><td>2018</td><td></td></tr><tr><td>Balance as of January 1,</td><td>$ 163.3</td><td>$ 282.4</td><td>$ 131.0</td><td></td></tr><tr><td>Current year increases</td><td>105.6</td><td>104.3</td><td>157.8</td><td></td></tr><tr><td>Write-offs, recoveries and other (2)</td><td>(21.3)</td><td>(223.4)</td><td>(6.4)</td><td></td></tr><tr><td>Balance as of December 31,</td><td>$ 247.6</td><td>$ 163.3</td><td>$ 282.4</td><td></td></tr></table>

(1) Year ended December 31, 2020 reflects the Company’s adoption of the current expected credit loss model for non-lease receivables. The adoption of this guidance did not have a material impact on the Company’s financial statements as the majority of the Company’s revenue is derived from its property operations and operating lease receivables are not within the scope of this guidance.

(2) Amounts are primarily related to uncollectible amounts in India. In 2018, recoveries include recognition of revenue resulting from collections of previously reserved amounts.

Functional Currency—The functional currency of each of the Company’s foreign operating subsidiaries is normally the respective local currency, except for Costa Rica and Argentina, where the functional currency is the U.S. Dollar. All foreign currency assets and liabilities held by the subsidiaries are translated into U.S. Dollars at the exchange rate in effect at the end of the applicable fiscal reporting period and all foreign currency revenues and expenses are translated at the average monthly exchange rates. Translation adjustments are reflected in equity as a component of Accumulated other comprehensive loss.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

(“AOCL”) in the consolidated balance sheets and included as a component of Comprehensive income in the consolidated statements of comprehensive income.

Gains and losses on foreign currency transactions are reflected in Other expense in the consolidated statements of operations. However, the effect from fluctuations in foreign currency exchange rates on intercompany debt for which repayment is not anticipated in the foreseeable future is reflected in AOCL in the consolidated balance sheets and included as a component of Comprehensive income.

The Company recorded the following net foreign currency losses:

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td>2018</td><td></td></tr><tr><td>Foreign currency losses recorded in AOCL</td><td>$ 391.0</td><td>$ 45.8</td><td>$ 385.8</td><td></td></tr><tr><td>Foreign currency losses (gains) recorded in Other expense</td><td>216.4</td><td>(6.1)</td><td>4.5</td><td></td></tr><tr><td>Total foreign currency losses</td><td>$ 607.4</td><td>$ 39.7</td><td>$ 390.3</td><td></td></tr></table>

Cash and Cash Equivalents—Cash and cash equivalents include cash on hand, demand deposits and short-term investments with original maturities of three months or less. The Company maintains its deposits at high-quality financial institutions and monitors the credit ratings of those institutions.

Restricted Cash—Restricted cash includes cash pledged as collateral to secure obligations and all cash whose use is otherwise limited by contractual provisions.

The reconciliation of cash and cash equivalents and restricted cash reported within the applicable balance sheet that sum to the total of the same such amounts shown in the statements of cash flows is as follows:

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td>2018</td><td></td></tr><tr><td>Cash and cash equivalents</td><td>$ 1,746.3</td><td>$ 1,501.2</td><td>$ 1,208.7</td><td></td></tr><tr><td>Restricted cash</td><td>115.1</td><td>76.8</td><td>96.2</td><td></td></tr><tr><td>Total cash, cash equivalents and restricted cash</td><td>$ 1,861.4</td><td>$ 1,578.0</td><td>$ 1,304.9</td><td></td></tr></table>

Property and Equipment—Property and equipment is recorded at cost or, in the case of acquired properties, at estimated fair value on the date acquired. Cost for self-constructed towers includes direct materials and labor and certain indirect costs associated with construction of the tower, such as transportation costs, employee benefits and payroll taxes. The Company begins the capitalization of costs during the pre-construction period, which is the period during which costs are incurred to evaluate the site, and continues to capitalize costs until the tower is substantially completed and ready for occupancy by a tenant. Labor and related costs capitalized for the years ended December 31, 2020, 2019 and 2018 were $51.1 million, $48.3 million and $55.0 million, respectively.

Expenditures for repairs and maintenance are expensed as incurred. Augmentation and improvements that extend an asset’s useful life or enhance capacity are capitalized.

Depreciation expense is recorded using the straight-line method over the assets' estimated useful lives. Towers and related assets on leased land are depreciated over the shorter of the estimated useful life of the asset or the term of the corresponding ground lease, taking into consideration lease renewal options and residual value.

Towers or assets acquired through finance leases are recorded net at the present value of future minimum lease payments or the fair value of the leased asset at the inception of the lease. Property and equipment and assets held under finance leases are amortized over the shorter of the applicable lease term or the estimated useful life of the respective assets for periods generally not exceeding twenty years.

The Company reviews its tower portfolio for indicators of impairment on an individual tower basis. Impairments primarily result from a tower not having current tenant leases or from having expenses in excess of revenues. The Company reviews other long-lived assets for impairment whenever events, changes in circumstances or other evidence indicate that the carrying amount of the Company’s assets may not be recoverable. The Company records impairment charges in Other operating expenses in the consolidated statements of operations in the period in which the Company identifies such impairment.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

Goodwill and Other Intangible Assets—The Company reviews goodwill for impairment at least annually (as of December 31) or whenever events or circumstances indicate the carrying value of an asset may not be recoverable.

Goodwill is recorded in the applicable segment and assessed for impairment at the reporting unit level. The Company employs a discounted cash flow analysis when testing goodwill for impairment. The key assumptions utilized in the discounted cash flow analysis include current operating performance, terminal sales growth rate, management's expectations of future operating results and cash requirements, the current weighted average cost of capital and an expected tax rate. The Company compares the fair value of the reporting unit, as calculated under an income approach using future discounted cash flows, to the carrying amount of the applicable reporting unit. If the carrying amount exceeds the fair value, an impairment loss would be recognized for the amount of the excess. The loss recognized is limited to the total amount of goodwill allocated to that reporting unit.

During the years ended December 31, 2020, 2019 and 2018, no potential impairment was identified, as the fair value of each of the reporting units was in excess of its carrying amount.

Intangible assets that are separable from goodwill and are deemed to have a definite life are amortized over their useful lives, generally ranging from three to twenty years and are evaluated separately for impairment at least annually or whenever events or circumstances indicate that the carrying amount of an asset may not be recoverable.

The Company reviews its network location intangible assets for indicators of impairment on an individual tower basis. Impairments primarily result from a tower not having current tenant leases or from having expenses in excess of revenues. The Company monitors its tenant-related intangible assets on a tenant by tenant basis for indicators of impairment, such as high levels of turnover or attrition, non-renewal of a significant number of contracts or the cancellation or termination of a relationship. The Company assesses recoverability by determining whether the carrying amount of the related assets will be recovered primarily through projected undiscounted future cash flows. If the Company determines that the carrying amount of an asset may not be recoverable, the Company measures any impairment loss based on the projected future discounted cash flows to be provided from the asset or available market information relative to the asset's fair value, as compared to the asset's carrying amount. The Company records impairment charges, which are discussed in note 17, in Other operating expenses in the consolidated statements of operations in the period in which the Company identifies such impairment.

Derivative Financial Instruments—Derivatives are recorded on the consolidated balance sheet at fair value. If a derivative is designated as a cash flow hedge, the effective portions of changes in the fair value of the derivative are recorded in AOCL, as well as a component of comprehensive income, and are recognized in the results of operations when the hedged item affects earnings. Changes in fair value of the ineffective portions of cash flow hedges are recognized in the results of operations. For derivative instruments that are designated and qualify as fair value hedges, changes in value of the derivatives are recorded in Other expense in the consolidated statements of operations in the current period, along with the offsetting gain or loss on the hedged item attributable to the hedged risk. For derivative instruments not designated as hedging instruments, changes in fair value are recognized in the results of operations in the period that the change occurs.

The primary risks managed through the use of derivative instruments is interest rate risk, exposure to changes in the fair value of debt attributable to interest rate risk and currency risk. From time to time, the Company enters into interest rate swap agreements or foreign currency contracts to manage exposure to these risks. Under these agreements, the Company is exposed to counterparty credit risk to the extent that a counterparty fails to meet the terms of a contract. The Company’s exposure is limited to the current value of the contract at the time the counterparty fails to perform. The Company assesses, both at the inception of the hedge and on an ongoing basis, whether the derivatives that are used in hedging transactions are highly effective in offsetting changes in cash flows or fair values of hedged items. The Company does not hold derivatives for trading purposes.

Fair Value Measurements—The Company determines the fair value of its financial instruments based on the fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.

Asset Retirement Obligations—When required, the Company recognizes the fair value of obligations to remove its tower assets and remediate the leased land upon which certain of its tower assets are located. Generally, the associated retirement costs are capitalized as part of the carrying amount of the related tower assets and depreciated over their estimated useful lives and the liability is accreted through the obligation’s estimated settlement date. Fair value estimates of asset retirement obligations generally involve discounting of estimated future cash flows associated with takedown costs. Periodic accretion of such liabilities due to the passage of time is included in Depreciation, amortization and accretion expense in the consolidated statements of operations. Adjustments are also made to the asset retirement obligation liability to reflect changes in the estimates of timing and amount of expected cash flows, with an offsetting adjustment made to the related long-lived tangible



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

asset. The significant assumptions used in estimating the Company’s aggregate asset retirement obligation are: timing of tower removals; cost of tower removals; timing and number of land lease renewals; expected inflation rates; and credit-adjusted, risk-free interest rates that approximate the Company’s incremental borrowing rate.

Income Taxes—As a REIT, the Company generally is not subject to U.S. federal income taxes on income generated by its REIT operations as it receives a dividends paid deduction for distributions to stockholders that generally offsets its REIT income and gains. However, the Company remains obligated to pay U.S. federal income taxes on certain earnings and continues to be subject to taxation in its foreign jurisdictions. Accordingly, the consolidated financial statements reflect provisions for federal, state, local and foreign income taxes. The Company recognizes deferred tax assets and liabilities for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis, as well as operating loss and tax credit carryforwards. The Company measures deferred tax assets and liabilities using enacted tax rates expected to apply to taxable income in the years in which those temporary differences and carryforwards are expected to be recovered or settled. The effect on deferred tax assets and liabilities as a result of a change in tax rates is recognized in income in the period that includes the enactment date.

The Company periodically reviews its deferred tax assets, and provides valuation allowances if, based on the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. Management assesses the available positive and negative evidence to estimate if sufficient future taxable income will be generated to use the existing deferred tax assets. Valuation allowances would be reversed as a reduction to the provision for income taxes if related deferred tax assets are deemed realizable based on changes in facts and circumstances relevant to the assets' recoverability.

The Company classifies uncertain tax positions as income tax liabilities in Other non-current liabilities in the consolidated balance sheet, unless expected to be paid within one year. The Company reports penalties and tax-related interest expense as a component of the income tax provision and interest income from tax refunds as a component of Interest income in the consolidated statements of operations.

Other Comprehensive Income (Loss)—Other comprehensive income (loss) refers to items excluded from net income that are recorded as an adjustment to equity, net of tax. The Company’s other comprehensive income (loss) primarily consisted of changes in fair value of effective derivative cash flow hedges, foreign currency translation adjustments and reclassification of unrealized losses on effective derivative cash flow hedges. The AOCL balance included accumulated foreign currency translation losses of $3.8 billion, $2.8 billion and $2.6 billion as of December 31, 2020, 2019 and 2018, respectively.

Distributions—As a REIT, the Company must annually distribute to its stockholders an amount equal to at least 90% of its REIT taxable income (determined before the deduction for distributed earnings and excluding any net capital gain). Generally, the Company has distributed, and expects to continue to distribute, all or substantially all of its REIT taxable income after taking into consideration its utilization of net operating losses (“NOLs”).

The amount, timing and frequency of future distributions will be at the sole discretion of the Board of Directors and will depend upon various factors, a number of which may be beyond the Company’s control, including the Company’s financial condition and operating cash flows, the amount required to maintain its qualification for taxation as a REIT and reduce any income and excise taxes that the Company otherwise would be required to pay, limitations on distributions in the Company’s existing and future debt and preferred equity instruments, the Company’s ability to utilize NOLs to offset the Company’s distribution requirements, limitations on its ability to fund distributions using cash generated through its TRSs and other factors that the Board of Directors may deem relevant.

Acquisitions—For acquisitions that meet the definition of a business combination, the Company applies the acquisition method of accounting where assets acquired and liabilities assumed are recorded at fair value at the date of each acquisition, and the results of operations are included with those of the Company from the dates of the respective acquisitions. Any excess of the purchase price paid by the Company over the amounts recognized for assets acquired and liabilities assumed is recorded as goodwill. The Company continues to evaluate acquisitions for a period not to exceed one year after the applicable acquisition date of each transaction to determine whether any additional adjustments are needed to the allocation of the purchase price paid for the assets acquired and liabilities assumed. All other acquisitions are accounted for as asset acquisitions and the purchase price is allocated to the net assets acquired with no recognition of goodwill. The purchase price is not subsequently adjusted.

The fair value of the assets acquired and liabilities assumed is typically determined by using either estimates of replacement costs or discounted cash flow valuation methods. When determining the fair value of tangible assets acquired, the Company must estimate the cost to replace the asset with a new asset taking into consideration such factors as age, condition and the economic useful life of the asset. When determining the fair value of intangible assets acquired and liabilities assumed, the



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

Company must estimate the applicable discount rate and the timing and amount of future cash flows, including rate and terms of renewal and attrition.

Revenue—The Company’s revenue is derived from leasing the right to use its communications sites and the land on which the sites are located (the “lease component”) and from the reimbursement of costs incurred by the Company in operating the communications sites and supporting the tenants’ equipment as well as other services and contractual rights (the “non-lease component”). Most of the Company’s revenue is derived from leasing arrangements and is accounted for as lease revenue unless the timing and pattern of revenue recognition of the non-lease component differs from the lease component. If the timing and pattern of the non-lease component revenue recognition differs from that of the lease component, the Company separately determines the stand-alone selling prices and pattern of revenue recognition for each performance obligation. Revenue related to DAS networks and fiber and other related assets results from agreements with tenants that are not leases.

The Company’s revenue from leasing arrangements, including fixed escalation clauses present in non-cancellable lease arrangements, is reported on a straight-line basis over the term of the respective leases when collectibility is probable. Escalation clauses tied to a consumer price index (“CPI”), or other inflation-based indices, and other incentives present in lease agreements with the Company’s tenants are excluded from the straight-line calculation. Total property straight-line revenues for the years ended December 31, 2020, 2019 and 2018 were $322.0 million, $183.5 million and $87.6 million, respectively.

Non-lease revenue—Non-lease revenue consists primarily of revenue generated from DAS networks, fiber and other property related revenue. DAS networks and fiber arrangements require that the Company provide the tenant the right to use the applicable communications infrastructure. Performance obligations are satisfied over time for the duration of the arrangements. Other property related revenue streams, which include site inspections, are not material on either an individual or consolidated basis.

Services revenue—The Company offers tower-related services in the United States. These services include AZP and structural analysis. There is a single performance obligation related to AZP and revenue is recognized over time based on milestones achieved, which are determined based on costs expected to be incurred. Structural analysis services may have more than one performance obligation, contingent upon the number of contracted services. Revenue is recognized at the point in time the services are completed.

Some of the Company’s contracts with tenants contain multiple performance obligations. For these arrangements, the Company allocates revenue to each performance obligation based on its relative standalone selling price, which is typically based on the price charged to tenants.

Since most of the Company’s contracts are leases, costs to enter into lease arrangements are capitalized under the applicable lease accounting guidance. Costs incurred to obtain non-lease contracts that are capitalized primarily relate to DAS networks and are not material to the consolidated financial statements. The Company has excluded sales tax, value added tax and similar taxes from non-lease revenue.

Revenue is disaggregated by geography in a manner consistent with the Company’s business segments, which are discussed further in note 21. A summary of revenue disaggregated by source and geography is as follows:

<table><tr><td>Year Ended December 31, 2020</td><td>U.S. &amp; Canada</td><td>Asia-Pacific</td><td>Africa</td><td>Europe</td><td>Latin America</td><td>Total</td></tr><tr><td>Non-lease property revenue</td><td>$ 258.4</td><td>$ 9.3</td><td>$ 13.8</td><td>$ 7.9</td><td>$ 118.4</td><td>$ 407.8</td></tr><tr><td>Services revenue</td><td>87.9</td><td>—</td><td>—</td><td>—</td><td>—</td><td>87.9</td></tr><tr><td>Total non-lease revenue</td><td>$ 346.3</td><td>$ 9.3</td><td>$ 13.8</td><td>$ 7.9</td><td>$ 118.4</td><td>$ 495.7</td></tr><tr><td>Property lease revenue</td><td>4,258.6</td><td>1,130.1</td><td>876.4</td><td>141.7</td><td>1,139.0</td><td>7,545.8</td></tr><tr><td>Total revenue</td><td>$4,604.9</td><td>$1,139.4</td><td>$ 890.2</td><td>$ 149.6</td><td>$1,257.4</td><td>$8,041.5</td></tr><tr><td>Year Ended December 31, 2019</td><td>U.S. &amp; Canada</td><td>Asia-Pacific</td><td>Africa</td><td>Europe</td><td>Latin America</td><td>Total</td></tr><tr><td>Non-lease property revenue</td><td>$ 255.7</td><td>$ 8.8</td><td>$ 4.0</td><td>$ 5.1</td><td>$ 138.2</td><td>$ 411.8</td></tr><tr><td>Services revenue</td><td>115.4</td><td>—</td><td>—</td><td>—</td><td>—</td><td>115.4</td></tr><tr><td>Total non-lease revenue</td><td>$ 371.1</td><td>$ 8.8</td><td>$ 4.0</td><td>$ 5.1</td><td>$ 138.2</td><td>$ 527.2</td></tr><tr><td>Property lease revenue</td><td>3,933.0</td><td>1,208.2</td><td>579.9</td><td>129.5</td><td>1,202.5</td><td>7,053.1</td></tr><tr><td>Total revenue</td><td>$4,304.1</td><td>$1,217.0</td><td>$ 583.9</td><td>$ 134.6</td><td>$1,340.7</td><td>$7,580.3</td></tr></table>



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

Information about non-lease receivables, contract assets and contract liabilities from contracts with tenants is as follows:

<table><tr><td></td><td colspan="2">December 31, 2020</td><td colspan="2">December 31, 2019</td></tr><tr><td>Accounts receivable</td><td>$     77.2</td><td>$     80.5</td><td></td><td></td></tr><tr><td>Prepaids and other current assets</td><td>21.8</td><td></td><td>8.3</td><td></td></tr><tr><td>Notes receivable and other non-current assets</td><td>23.7</td><td></td><td>21.3</td><td></td></tr><tr><td>Unearned revenue (1)</td><td>120.3</td><td></td><td>91.7</td><td></td></tr><tr><td>Other non-current liabilities (1)</td><td>432.4</td><td></td><td>379.2</td><td></td></tr></table>

(1) Includes capital contributions related to DAS networks.

The Company records unearned revenue when payments are received from tenants in advance of the completion of the Company’s performance obligations. Long-term unearned revenue is included in Other non-current liabilities.

During the year ended December 31, 2020, the Company recognized $142.3 million of revenue that was previously included in the contract liabilities balances, primarily arising from balances as of December 31, 2019.

The Company records unbilled receivables, which are included in Prepaids and other current assets, when it has completed a performance obligation prior to its ability to bill under the customer arrangement. Other contract assets are included in Notes receivable and other non-current assets. The Company did not record any change in unbilled receivables attributable to non-lease property revenue recognized during each of the years ended December 31, 2020 and 2019. The change in contract assets attributable to revenue recognized during the years ended December 31, 2020 and 2019 was $6.8 million and $3.1 million, respectively.

The Company does not disclose the value of unsatisfied performance obligations for agreements (i) with an original expected length of one year or less or (ii) for which it recognizes revenue at the amount to which it has the right to invoice for services performed.

Lease Accounting and Rent Expense—The Company accounts for leases using a right-of-use model, which recognizes that, at the date of commencement, a lessee has a financial obligation to make lease payments to the lessor for the right to use the underlying asset during the lease term. The lessee recognizes a corresponding right-of-use asset related to this right.

The Company recognizes a right-of-use lease asset and lease liability for operating and finance leases. The right-of-use asset is measured as the sum of the lease liability, prepaid or accrued lease payments, any initial direct costs incurred and any other applicable amounts. The Company reviews its right-of-use assets for impairment whenever events, changes in circumstances or other evidence indicate that the carrying amount of the Company’s assets may not be recoverable. The Company reviews its right-of-use assets for indicators of impairment at the lowest level of identifiable cash flows, as part of its tower portfolio. Impairments primarily result from a tower not having current tenant leases or from having expenses in excess of revenues. The Company records impairment charges in Other operating expenses in the consolidated statements of operations in the period in which the Company identifies such impairment.

The calculation of the lease liability requires the Company to make certain assumptions for each lease, including lease term and discount rate implicit in each lease, which could significantly impact the gross lease obligation, the duration and the present value of the lease liability. When calculating the lease term, the Company considers the renewal, cancellation and termination rights available to the Company and the lessor. The Company determines the discount rate by calculating the incremental borrowing rate on a collateralized basis at the commencement of a lease or upon a change in the lease term.

Many of the leases underlying the Company’s tower sites have fixed rent escalations, which provide for periodic increases in the amount of ground rent payable by the Company over time. In addition, certain of the Company’s tenant leases require the Company to exercise available renewal options pursuant to the underlying ground lease if the tenant exercises its renewal option. The Company’s calculation of the lease liability includes straight-line ground rent expense for these leases based on the term of the underlying ground lease plus all periods, if any, for which failure to renew the lease imposes an economic penalty to the Company such that renewal appears to be reasonably assured.

The straight-line component of ground rent expense for the years ended December 31, 2020, 2019 and 2018 was $51.6 million, $44.4 million and $57.9 million, respectively.

Selling, General, Administrative and Development Expense—Selling, general and administrative expense consists of overhead expenses related to the Company’s property and services operations and corporate overhead costs not specifically allocable to



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

any of the Company’s individual business operations. Development expense consists of costs related to the Company’s acquisition efforts, costs associated with new business initiatives and project cancellation costs.

Stock-Based Compensation—Stock-based compensation expense is measured at the accounting measurement date based on the fair value of the award and is generally recognized as an expense over the service period, which typically represents the vesting period. The Company provides for accelerated vesting and extended exercise periods of stock options and restricted stock units upon an employee’s death or permanent disability, or upon an employee’s qualified retirement, provided certain eligibility criteria are met. Accordingly, the Company recognizes compensation expense for stock options and time-based restricted stock units (“RSUs”) over the shorter of (i) the four-year vesting period or (ii) the period from the date of grant to the date the employee becomes eligible for such benefits due to death, disability or qualified retirement, which may occur upon grant. The expense recognized includes the impact of forfeitures as they occur.

The Company grants performance-based restricted stock units (“PSUs”) to its executive officers. Threshold, target and maximum parameters are established for a three-year performance period at the time of grant. The metrics are used to calculate the number of shares that will be issuable when the awards vest, which may range from zero to 200% of the target amounts. The Company recognizes compensation expense for PSUs over the three-year vesting period, subject to adjustment based on the date the employee becomes eligible for retirement benefits as well as performance relative to grant parameters.

The fair value of stock options is determined using the Black-Scholes option-pricing model and the fair value of RSUs and PSUs is based on the fair value of the Company’s common stock on the date of grant. The Company recognizes all stock-based compensation expense in either Selling, general, administrative and development expense, costs of operations or as part of the costs associated with the construction of the tower assets.

In connection with the vesting of restricted stock units, the Company withholds from issuance a number of shares of common stock to satisfy certain employee tax withholding obligations arising from such vesting. The shares withheld are considered constructively retired. The Company recognizes the fair value of the shares withheld in Additional paid-in capital on the consolidated balance sheets. As of December 31, 2020, the Company has withheld from issuance an aggregate of 2.4 million shares, including 0.3 million shares related to the vesting of restricted stock units during the year ended December 31, 2020.

Litigation Costs—The Company periodically becomes involved in various claims and lawsuits that are incidental to its business. The Company regularly monitors the status of pending legal actions to evaluate both the magnitude and likelihood of any potential loss. The Company accrues for these potential losses when it is probable that a liability has been incurred and the amount of loss, or possible range of loss, can be reasonably estimated. Should the ultimate losses on contingencies or litigation vary from estimates, adjustments to those liabilities may be required. The Company also incurs legal costs in connection with these matters and records estimates of these expenses, which are reflected in Selling, general, administrative and development expense in the accompanying consolidated statements of operations.

Earnings Per Common Share—Basic and Diluted—Basic net income per common share represents net income attributable to American Tower Corporation common stockholders divided by the weighted average number of common shares outstanding during the period. Diluted net income per common share represents net income attributable to American Tower Corporation common stockholders divided by the weighted-average number of common shares outstanding during the period and any dilutive common share equivalents, including (A) shares issuable upon the vesting of RSUs and exercise of stock options and (B) shares expected to be earned upon the achievement of the parameters established for PSUs, each to the extent not anti-dilutive. The Company uses the treasury stock method to calculate the effect of its outstanding RSUs, PSUs and stock options.

Retirement Plan—The Company has a 401(k) plan covering substantially all employees who meet certain age and employment requirements. For the years ended December 31, 2020, 2019 and 2018, the Company matched 100% of the first 5% of a participant's contributions. For the years ended December 31, 2020, 2019 and 2018, the Company contributed $13.2 million, $11.8 million and $11.2 million to the plan, respectively.

## Accounting Standards Updates

In June 2016, the Financial Accounting Standards Board (the "FASB") issued guidance that modifies how entities measure credit losses on most financial instruments. The new guidance replaces the current "incurred loss" model with an "expected credit loss" model that requires consideration of a broader range of information to estimate expected credit losses over the lifetime of the asset. Operating lease receivables are not within the scope of this guidance. Effective January 1, 2020, the Company adopted the new guidance using the modified retrospective approach. There was no cumulative-effect adjustment to Distributions in excess of earnings on the consolidated balance sheet as of the effective date. The adoption of this guidance did not have a material impact on the Company's financial statements. Results for reporting periods beginning January 1, 2020 are



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

presented under the new standard, while prior-period amounts are not adjusted and continue to be reported in accordance with accounting under the previously applicable guidance.

In January 2017, the FASB issued guidance on accounting for goodwill impairments. The guidance eliminates Step 2 from the goodwill impairment test and requires, among other things, recognition of an impairment loss when the carrying value of a reporting unit exceeds its fair value. The loss recognized is limited to the total amount of goodwill allocated to that reporting unit. Effective January 1, 2020, the Company adopted the new guidance on a prospective basis. The adoption of this guidance did not have a material impact on the Company’s financial statements.

In March 2020, the FASB issued guidance to provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions affected by reference rate reform if certain criteria are met. The guidance applies only to contracts, hedging relationships and other transactions that reference the London Interbank Offered Rate (“LIBOR”) or another reference rate expected to be discontinued because of reference rate reform. The expedients and exceptions provided by the guidance do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022 for which an entity has elected certain optional expedients that are retained through the end of the hedging relationship. As of December 31, 2020, the Company has not modified any contracts as a result of reference rate reform and is evaluating the impact this standard may have on its financial statements.

In April 2020, the FASB issued guidance on the application of lease accounting guidance to lease concessions provided as a result of the coronavirus (“COVID-19”) pandemic (the “Lease Modification Q&A”). Under existing guidance, a Company must determine, on a lease by lease basis, if a concession was (i) the result of a new lease agreement and as such treated within the lease modification accounting framework or (ii) under the enforceable rights and obligations within the existing lease agreement and as such precluded from applying the lease modification accounting framework. The Lease Modification Q&A provides an optional exception that allows a Company, if certain criteria have been met, to bypass the lease by lease analysis, and instead elect to either apply the lease modification accounting framework or not, provided that the election is applied consistently to leases with similar characteristics and circumstances. The Company evaluated the impact this guidance may have on its financial statements and has elected to not bypass the lease by lease analysis.

## 2. PREPAID AND OTHER CURRENT ASSETS

Prepaid and other current assets consisted of the following:

<table><tr><td rowspan="2"></td><td colspan="3">As of</td></tr><tr><td>December 31, 2020</td><td>December 31, 2019</td><td></td></tr><tr><td>Prepaid assets</td><td>$ 66.1</td><td>$ 56.8</td><td></td></tr><tr><td>Prepaid income tax</td><td>143.7</td><td>185.8</td><td></td></tr><tr><td>Unbilled receivables</td><td>176.9</td><td>142.3</td><td></td></tr><tr><td>Value added tax and other consumption tax receivables</td><td>66.3</td><td>71.3</td><td></td></tr><tr><td>Other miscellaneous current assets</td><td>79.6</td><td>57.4</td><td></td></tr><tr><td>Prepaid and other current assets</td><td>$ 532.6</td><td>$ 513.6</td><td></td></tr></table>

## 3. PROPERTY AND EQUIPMENT

Property and equipment (including assets held under finance leases) consisted of the following:

<table><tr><td rowspan="2"></td><td rowspan="2">Estimated Useful Lives (years) (1)</td><td colspan="2">As of</td></tr><tr><td>December 31, 2020</td><td>December 31, 2019</td></tr><tr><td>Towers</td><td>Up to 20</td><td>$ 14,433.9</td><td>$ 13,930.7</td></tr><tr><td>Equipment (2)</td><td>3 - 20</td><td>2,327.1</td><td>1,897.3</td></tr><tr><td>Buildings and improvements</td><td>Up to 32</td><td>634.0</td><td>638.9</td></tr><tr><td>Land and improvements (3)</td><td>Up to 20</td><td>2,845.9</td><td>2,486.1</td></tr><tr><td>Construction-in-progress</td><td></td><td>431.5</td><td>372.6</td></tr><tr><td>Total</td><td></td><td>20,672.4</td><td>19,325.6</td></tr><tr><td>Less accumulated depreciation</td><td></td><td>(7,863.7)</td><td>(7,241.2)</td></tr><tr><td>Property and equipment, net</td><td></td><td>$ 12,808.7</td><td>$ 12,084.4</td></tr></table>



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

(1) Assets on leased land are depreciated over the shorter of the estimated useful life of the asset or the term of the corresponding ground lease taking into consideration lease renewal options and residual value.

(2) Includes fiber and DAS assets.
(3) Estimated useful lives apply to improvements only.

Total depreciation expense for the years ended December 31, 2020, 2019 and 2018 was $924.3 million, $905.5 million and $883.1 million, respectively. Depreciation expense includes amounts related to finance lease assets for the years ended December 31, 2020 and 2019 of $153.0 million and $168.1 million, respectively.

Information about finance lease-related balances is as follows:

<table><tr><td rowspan="2">Finance leases:</td><td rowspan="2">Classification</td><td colspan="3">As of December 31,</td></tr><tr><td>2020</td><td>2019</td><td></td></tr><tr><td>Property and equipment</td><td>Towers</td><td>$ 2,706.3</td><td>$ 2,695.9</td><td></td></tr><tr><td>Accumulated depreciation</td><td></td><td>(1,209.7)</td><td>(1,062.0)</td><td></td></tr><tr><td>Property and equipment, net</td><td></td><td>$ 1,496.6</td><td>$ 1,633.9</td><td></td></tr><tr><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Property and equipment</td><td>Buildings and improvements</td><td>$ 167.6</td><td>$ 167.0</td><td></td></tr><tr><td>Accumulated depreciation</td><td></td><td>(76.3)</td><td>(65.3)</td><td></td></tr><tr><td>Property and equipment, net</td><td></td><td>$ 91.3</td><td>$ 101.7</td><td></td></tr><tr><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Property and equipment</td><td>Land</td><td>$ 129.9</td><td>$ 150.9</td><td></td></tr><tr><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Property and equipment</td><td>Equipment</td><td>$ 48.8</td><td>$ 45.9</td><td></td></tr><tr><td>Accumulated depreciation</td><td></td><td>(15.3)</td><td>(13.1)</td><td></td></tr><tr><td>Property and equipment, net</td><td></td><td>$ 33.5</td><td>$ 32.8</td><td></td></tr></table>

## 4. LEASES

The Company determines if an arrangement is a lease at the inception of the agreement. The Company considers an arrangement to be a lease if it conveys the right to control the use of the communications site or ground space underneath a communications site for a period of time in exchange for consideration. The Company is both a lessor and a lessee.

Lessor—The Company is a lessor in most of its revenue arrangements, as property revenue is derived from tenant leases of specifically-identified, physically distinct space on the Company’s communications real estate assets. The Company’s lease arrangements with its tenants vary depending upon the region and the industry of the tenant and generally have initial non-cancellable terms of five to ten years with multiple renewal terms. The leases also contain provisions that periodically increase the rent due, typically annually, based on a fixed escalation percentage or an inflationary index, or a combination of both. The Company structures its leases to include financial penalties if a tenant terminates the lease, which serve to disincentivize tenants from terminating the lease prior to the expiration of the lease term.

The Company’s leasing arrangements outside of the U.S. may require that the Company provide power to the communications site through an electrical grid connection, diesel fuel generators or other sources and permit the Company to pass through the costs of, or otherwise charge for, these services. Many arrangements require that the communications site has power for a specified percentage of time. In most cases, if delivery of power falls below the specified service level, a corresponding reduction in revenue is recorded. The Company has determined that this performance obligation is satisfied over time for the duration of the lease.

The Company typically has more than one tenant on a site and, by performing ordinary course repair and maintenance work, can often lease a site, either through renewing existing agreements or leasing to new tenants, for periods beyond the existing tenant lease term. Accordingly, the Company has minimal risk with respect to the residual value of its leased assets. Communications sites are depreciated over their estimated useful lives, which generally do not exceed twenty years.

As of December 31, 2020, the Company does not have any material related party leases as a lessor. The Company generally does not enter into sales-type leases or direct financing leases. The Company’s leases generally do not include any incentives



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

for the lessee, however, if incentives are present, they are evaluated to determine proper treatment. In addition, the Company’s leases do not include any lessee purchase options.

Historically, the Company has been able to successfully renew its ground leases as needed to ensure continuation of its tower revenue. Accordingly, the Company assumes that it will have access to the land underneath its tower sites when calculating future minimum rental receipts. Future minimum rental receipts expected under non-cancellable operating lease agreements as of December 31, 2020, were as follows:

<table><tr><td>Year Ended December 31,</td><td>Amount (1)</td></tr><tr><td>2021</td><td>$ 6,194.6</td></tr><tr><td>2022</td><td>5,905.5</td></tr><tr><td>2023</td><td>5,779.5</td></tr><tr><td>2024</td><td>5,618.8</td></tr><tr><td>2025</td><td>5,410.6</td></tr><tr><td>Thereafter</td><td>29,660.9</td></tr><tr><td>Total</td><td>$ 58,569.9</td></tr></table>

(1) Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.

Lessee—The Company enters into arrangements as a lessee primarily for ground space underneath its communications sites. These arrangements are typically long-term lease agreements with initial non-cancellable terms of approximately five to ten years with one or more automatic or exercisable renewal periods and specified increases in lease payments upon exercise of the renewal options. The Company typically exercises its ground lease renewal options in order to provide ongoing tenant space on its communications sites through the end of the tenant lease term. Escalation clauses present in operating leases, excluding those tied to CPI or other inflation-based indices, are recognized on a straight-line basis over the estimated lease term of the applicable lease as a component of rent expense. Additionally, the escalations tied to CPI or another inflation-based index are considered variable lease payments. In certain circumstances, the Company enters into revenue sharing arrangements with the ground space owner, which results in variability in lease payments. In most markets outside of the U.S., in the event there are no tenants on the communications site, the Company generally has unilateral termination rights and in certain situations, the lease is structured to allow for termination by the Company with minimal or no penalties. Ground lease arrangements usually include annual escalations and do not contain any residual value guarantees or restrictions on dividends, other financial obligations or other similar terms. The Company has entered into certain transactions whereby at the end of a lease, sublease or similar arrangement, the Company has the option to purchase the corresponding communications sites. These transactions are further described in note 19.

The Company’s lease liability is the present value of the remaining minimum rental payments to be made over the remaining lease term, including renewal options reasonably certain to be exercised. The Company also considers termination options and factors those into the determination of lease payments when appropriate. To determine the lease term, the Company considers all renewal periods that are reasonably certain to be exercised, taking into consideration all economic factors, including the communications site’s estimated economic life (generally 20 years) and the respective lease terms of the Company’s tenants under the existing lease arrangements on such site.

The Company assesses its right-of-use asset and other lease-related assets for impairment, as described in note 1. During the years ended December 31, 2020 and 2019, the Company recorded $76.1 million and $9.9 million, respectively, of impairment expense related to these assets.

As of December 31, 2020, the Company does not have any material related party leases as a lessee. The Company does not have any sale-leaseback arrangements as lessee and typically does not enter into leveraged leases.

The Company leases certain land and office space under operating leases and land and improvements, towers and vehicles under finance leases. As of December 31, 2020, operating lease assets were included in Right-of-use asset and finance lease assets were included in Property and equipment, net in the consolidated balance sheet.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

Information about other lease-related balances is as follows:

<table><tr><td rowspan="2"></td><td colspan="3">As of</td></tr><tr><td>December 31, 2020</td><td colspan="2">December 31, 2019</td></tr><tr><td>Operating leases:</td><td></td><td></td><td></td></tr><tr><td>Right-of-use asset</td><td>$ 7,789.2</td><td>$ 7,357.4</td><td></td></tr><tr><td>Current portion of lease liability</td><td>$ 539.9</td><td>$ 494.5</td><td></td></tr><tr><td>Lease liability</td><td>6,884.4</td><td>6,510.4</td><td></td></tr><tr><td>Total operating lease liability</td><td>$ 7,424.3</td><td>$ 7,004.9</td><td></td></tr><tr><td>Finance leases:</td><td></td><td></td><td></td></tr><tr><td>Current portion of lease liability</td><td>$ 4.9</td><td>$ 6.7</td><td></td></tr><tr><td>Lease liability</td><td>23.0</td><td>24.0</td><td></td></tr><tr><td>Total finance lease liability</td><td>$ 27.9</td><td>$ 30.7</td><td></td></tr></table>

As most of the Company’s leases do not specifically state an implicit rate, the Company uses a market-specific incremental borrowing rate consistent with the lease term as of the lease commencement date or upon a remeasurement event when calculating the present value of the remaining lease payments. The incremental borrowing rate reflects the cost to borrow on a securitized basis in each market. The remaining lease term does not reflect all renewal options available to the Company, only those renewal options that the Company has assessed as reasonably certain of being exercised taking into consideration the economic and other factors noted above.

The weighted-average remaining lease terms and incremental borrowing rates are as follows:

<table><tr><td rowspan="2"></td><td colspan="2">As of</td></tr><tr><td>December 31, 2020</td><td>December 31, 2019</td></tr><tr><td>Operating leases:</td><td></td><td></td></tr><tr><td>Weighted-average remaining lease term (years)</td><td>13.7</td><td>13.1</td></tr><tr><td>Weighted-average incremental borrowing rate</td><td>5.6 %</td><td>6.1 %</td></tr><tr><td>Finance leases:</td><td></td><td></td></tr><tr><td>Weighted-average remaining lease term (years)</td><td>12.1</td><td>15.0</td></tr><tr><td>Weighted-average incremental borrowing rate</td><td>6.8 %</td><td>6.2 %</td></tr></table>

The following table sets forth the components of lease cost:

<table><tr><td></td><td>Year ended December 31, 2020</td><td>Year ended December 31, 2019</td></tr><tr><td>Operating lease cost</td><td>$ 977.2</td><td>$ 1,013.1</td></tr><tr><td>Variable lease costs not included in lease liability (1)</td><td>280.0</td><td>261.7</td></tr></table>

(1) Includes property tax paid on behalf of the landlord.

The interest expense on finance lease liabilities was $1.3 million and $1.7 million for the years ended December 31, 2020 and 2019, respectively. Assets held under finance leases are recorded in property and equipment and are depreciated over the lesser of the remaining lease term or the remaining useful life.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

Supplemental cash flow information is as follows:

<table><tr><td></td><td>Year ended December 31, 2020</td><td>Year ended December 31, 2019</td></tr><tr><td>Cash paid for amounts included in the measurement of lease liabilities:</td><td></td><td></td></tr><tr><td>Operating cash flows from operating leases</td><td>$ (988.3)</td><td>$ (1,012.2)</td></tr><tr><td>Operating cash flows from finance leases</td><td>$ (1.3)</td><td>$ (1.7)</td></tr><tr><td>Financing cash flows from finance leases</td><td>$ (9.2)</td><td>$ (18.0)</td></tr><tr><td>Non-cash items:</td><td></td><td></td></tr><tr><td>New operating leases (1)</td><td>$ 346.0</td><td>$ 409.5</td></tr><tr><td>Operating lease modifications and reassessments</td><td>$ 843.1</td><td>$ 334.1</td></tr></table>

(1) Amount includes new operating leases and leases acquired in connection with acquisitions.

As of December 31, 2020, the Company does not have material operating or financing leases that have not yet commenced.

Maturities of operating and finance lease liabilities as of December 31, 2020 were as follows:

<table><tr><td>Fiscal Year</td><td>Operating Lease (1)</td><td>Finance Lease (1)</td></tr><tr><td>2021</td><td>$ 901.1</td><td>$ 6.2</td></tr><tr><td>2022</td><td>869.0</td><td>5.3</td></tr><tr><td>2023</td><td>836.4</td><td>3.6</td></tr><tr><td>2024</td><td>798.0</td><td>2.9</td></tr><tr><td>2025</td><td>751.8</td><td>2.1</td></tr><tr><td>Thereafter</td><td>6,423.4</td><td>26.9</td></tr><tr><td>Total lease payments</td><td>10,579.7</td><td>47.0</td></tr><tr><td>Less amounts representing interest</td><td>(3,155.4)</td><td>(19.1)</td></tr><tr><td>Total lease liability</td><td>7,424.3</td><td>27.9</td></tr><tr><td>Less current portion of lease liability</td><td>539.9</td><td>4.9</td></tr><tr><td>Non-current lease liability</td><td>$ 6,884.4</td><td>$ 23.0</td></tr></table>

(1) Balances are translated at the applicable period-end exchange rate, which may impact comparability between periods.

## 5. GOODWILL AND OTHER INTANGIBLE ASSETS

The changes in the carrying value of goodwill for each of the Company’s business segments were as follows:

<table><tr><td rowspan="2"></td><td colspan="6">Property</td><td rowspan="2">Total</td></tr><tr><td>U.S. &amp; Canada</td><td>Asia-Pacific</td><td>Africa</td><td>Europe</td><td>Latin America</td><td>Services</td></tr><tr><td>Balance as of December 31, 2018</td><td>$ 3,382.5</td><td>$ 1,045.5</td><td>$ 119.3</td><td>$ 262.0</td><td>$ 690.6</td><td>$ 2.0</td><td>$ 5,501.9</td></tr><tr><td>Additions and adjustments (1)</td><td>32.8</td><td>—</td><td>670.0</td><td>—</td><td>—</td><td>—</td><td>702.8</td></tr><tr><td>Effect of foreign currency translation</td><td>—</td><td>(23.7)</td><td>0.9</td><td>(5.8)</td><td>2.2</td><td>—</td><td>(26.4)</td></tr><tr><td>Balance as of December 31, 2019</td><td>$ 3,415.3</td><td>$ 1,021.8</td><td>$ 790.2</td><td>$ 256.2</td><td>$ 692.8</td><td>$ 2.0</td><td>$ 6,178.3</td></tr><tr><td>Additions and adjustments (2)</td><td>1,335.5</td><td>18.7</td><td>(153.6)</td><td>—</td><td>—</td><td>—</td><td>1,200.6</td></tr><tr><td>Effect of foreign currency translation</td><td>—</td><td>(23.6)</td><td>(11.0)</td><td>22.9</td><td>(84.5)</td><td>—</td><td>(96.2)</td></tr><tr><td>Balance as of December 31, 2020</td><td>$ 4,750.8</td><td>$ 1,016.9</td><td>$ 625.6</td><td>$ 279.1</td><td>$ 608.3</td><td>$ 2.0</td><td>$ 7,282.7</td></tr></table>

(1) Additions consist of $704.3 million resulting from 2019 acquisitions, partially offset by $1.5 million from revisions to prior-year acquisitions due to measurement period adjustments.

(2) U.S. & Canada and Asia-Pacific consist of an aggregate of $1,354.2 million of additions related to the InSite Acquisition. Africa consists of measurement period adjustments related to the Eaton Towers Acquisition (as defined in note 7).



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

The Company’s other intangible assets subject to amortization consisted of the following:

<table><tr><td rowspan="2"></td><td colspan="6">As of December 31, 2020</td><td colspan="4">As of December 31, 2019</td></tr><tr><td>Estimated Useful Lives (years)</td><td>Gross Carrying Value</td><td colspan="2">Accumulated Amortization</td><td>Net Book Value</td><td colspan="2">Gross Carrying Value</td><td>Accumulated Amortization</td><td colspan="2">Net Book Value</td></tr><tr><td>Acquired network location intangibles (1)</td><td>Up to 20</td><td>$ 5,784.0</td><td>$ (2,117.6)</td><td>$ 3,666.4</td><td>$ 5,150.8</td><td>$ (1,920.4)</td><td>$ 3,230.4</td><td></td><td></td><td></td></tr><tr><td>Acquired tenant-related intangibles</td><td>Up to 20</td><td>14,322.5</td><td>(4,237.5)</td><td>10,085.0</td><td>12,674.1</td><td>(3,674.6)</td><td>8,999.5</td><td></td><td></td><td></td></tr><tr><td>Acquired licenses and other intangibles</td><td>3-20</td><td>97.8</td><td>(9.4)</td><td>88.4</td><td>106.7</td><td>(18.2)</td><td>88.5</td><td></td><td></td><td></td></tr><tr><td>Total other intangible assets</td><td></td><td>$ 20,204.3</td><td>$ (6,364.5)</td><td>$ 13,839.8</td><td>$ 17,931.6</td><td>$ (5,613.2)</td><td>$ 12,318.4</td><td></td><td></td><td></td></tr></table>

(1) Acquired network location intangibles are amortized over the shorter of the term of the corresponding ground lease, taking into consideration lease renewal options and residual value, generally up to 20 years, as the Company considers these intangibles to be directly related to the tower assets.

The acquired network location intangibles represent the value to the Company of the incremental revenue growth that could potentially be obtained from leasing the excess capacity on acquired communications sites. The acquired tenant-related intangibles typically represent the value to the Company of tenant contracts and relationships in place at the time of an acquisition or similar transaction, including assumptions regarding estimated renewals.

The Company amortizes its acquired network location intangibles and tenant-related intangibles on a straight-line basis over their estimated useful lives. As of December 31, 2020, the remaining weighted average amortization period of the Company’s intangible assets was 15 years. Amortization of intangible assets for the years ended December 31, 2020, 2019 and 2018 was $867.2 million, $791.3 million and $1,144.1 million, respectively. Amortization expense decreased for the year ended December 31, 2019 as compared to the year ended December 31, 2018, because in 2018, the Company entered into agreements with one of its tenants in India, Tata Teleservices Limited (“Tata Teleservices”) and related entities (collectively, “Tata”), for a settlement and release of certain contractual lease obligations of Tata Teleservices. As a result, the Company recorded $327.5 million of accelerated amortization related to the Tata tenant relationship in 2018, which was subsequently retired.

Based on current exchange rates, the Company expects to record amortization expense as follows over the next five years:

<table><tr><td>Fiscal Year</td><td>Amount</td></tr><tr><td>2021</td><td>$ 999.6</td></tr><tr><td>2022</td><td>$ 994.0</td></tr><tr><td>2023</td><td>$ 969.0</td></tr><tr><td>2024</td><td>$ 959.1</td></tr><tr><td>2025</td><td>$ 927.6</td></tr></table>

## 6. NOTES RECEIVABLE AND OTHER NON-CURRENT ASSETS

Notes receivable and other non-current assets consisted of the following:

<table><tr><td rowspan="2"></td><td colspan="3">As of</td></tr><tr><td>December 31, 2020</td><td colspan="2">December 31, 2019</td></tr><tr><td>Notes receivable</td><td>$ 6.5</td><td>$ 1.1</td><td></td></tr><tr><td>Other miscellaneous assets</td><td>393.6</td><td>405.3</td><td></td></tr><tr><td>Notes receivable and other non-current assets</td><td>$ 400.1</td><td>$ 406.4</td><td></td></tr></table>

## 7. ACQUISITIONS

The Company evaluates each of its acquisitions under the accounting guidance framework to determine whether to treat an acquisition as an asset acquisition or a business combination. For those transactions treated as asset acquisitions, the purchase price is allocated to the assets or rights acquired and liabilities assumed, with no recognition of goodwill. For those transactions treated as business combinations, the estimates of the fair value of the assets or rights acquired and liabilities assumed at the



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

date of the applicable acquisition are subject to adjustment during the measurement period (up to one year from the particular acquisition date). The primary areas of the accounting for the acquisitions that are not yet finalized relate to the fair value of certain tangible and intangible assets acquired and liabilities assumed, including tax positions, which may include contingent consideration, residual goodwill and any related tax impact.

The fair value of these net assets acquired are based on management’s estimates and assumptions, as well as other information compiled by management, including valuations that utilize customary valuation procedures and techniques. While the Company believes that such preliminary estimates provide a reasonable basis for estimating the fair value of assets acquired and liabilities assumed, it evaluates any necessary information prior to finalization of the fair value. During the measurement period for those acquisitions accounted for as business combinations, the Company will adjust assets or liabilities if new information is obtained about facts and circumstances that existed as of the acquisition date that, if known, would have resulted in the revised estimated values of those assets or liabilities as of that date.

Impact of current year acquisitions—The Company typically acquires communications sites and other communications infrastructure assets from wireless carriers or other tower operators and subsequently integrates those sites and related assets into its existing portfolio of communications sites and related assets. The financial results of the Company’s acquisitions have been included in the Company’s consolidated statements of operations for the year ended December 31, 2020 from the date of the respective acquisition. The date of acquisition, and by extension the point at which the Company begins to recognize the results of an acquisition, may depend on, among other things, the receipt of contractual consents, the commencement and extent of leasing arrangements and the timing of the transfer of title or rights to the assets, which may be accomplished in phases. Sites acquired from communications service providers may never have been operated as a business and may instead have been utilized solely by the seller as a component of its network infrastructure. An acquisition may or may not involve the transfer of business operations or employees.

For those acquisitions accounted for as business combinations, the Company recognizes acquisition and merger related expenses in the period in which they are incurred and services are received; for transactions accounted for as asset acquisitions, these costs are capitalized as part of the purchase price. Acquisition and merger related costs may include finder's fees, advisory, legal, accounting, valuation and other professional or consulting fees and general administrative costs directly related to completing the transaction. Integration costs include incremental and non-recurring costs necessary to convert data, retain employees and otherwise enable the Company to operate acquired businesses or assets efficiently. The Company records acquisition and merger related expenses for business combinations, as well as integration costs for all acquisitions, in Other operating expenses in the consolidated statements of operations.

During the years ended December 31, 2020, 2019 and 2018, the Company recorded acquisition and merger related expenses for business combinations and non-capitalized asset acquisition costs and integration costs as follows:

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td>2018</td><td></td></tr><tr><td>Acquisition and merger related expenses</td><td>$ 15.5</td><td>$ 26.9</td><td>$ 14.1</td><td></td></tr><tr><td>Integration costs</td><td>$ 23.1</td><td>$ 9.8</td><td>$ 16.1</td><td></td></tr></table>

During the years ended December 31, 2020 and 2019, the Company recorded net benefits of $4.4 million and $13.1 million related to pre-acquisition contingencies and settlements, respectively.

## 2020 Transactions

The estimated aggregate impact of the acquisitions completed in 2020 on the Company’s revenues and gross margin for the year ended December 31, 2020 was approximately $14.9 million and $10.5 million, respectively. The revenues and gross margin amounts also reflect incremental revenues from the addition of new tenants to such sites subsequent to the transaction date. Acquisitions completed in 2020 were included in all of the Company’s property segments.

InSite Acquisition—On December 23, 2020, the Company acquired 100% of the outstanding units of IWG Holdings, LLC, the parent company of InSite, which owned, operated and managed approximately 3,000 communications sites in the U.S. and Canada. The portfolio includes approximately 1,400 owned towers in the United States, over 200 owned towers in Canada and approximately 40 DAS networks in the United States. In addition, the portfolio includes more than 600 land parcels under communications sites in the United States, Canada and Australia, as well as approximately 400 rooftop sites. The acquired U.S. and Canada assets and operations are included in the U.S. & Canada property segment and the acquired Australian assets and operations are included in the Asia-Pacific property segment. The total consideration for the InSite Acquisition, including cash acquired, the repayment and assumption of certain debt held by InSite, was approximately $3.5 billion, subject to certain



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

closing adjustments. The InSite Acquisition was accounted for as a business combination and is subject to post-closing adjustments.

Entel Acquisition—On December 19, 2019, the Company entered into a definitive agreement to acquire approximately 3,200 communications sites in Chile and Peru from Entel PCS Telecomunicaciones S.A. and Entel Peru S.A. (“Entel”) for total consideration of approximately $0.8 billion (as of the date of signing). The Company completed the acquisition of approximately 2,400 communications sites in December 2019. During the year ended December 31, 2020, the Company completed the acquisition of an additional 530 communications sites pursuant to this agreement for an aggregate total purchase price of $137.7 million (as of the dates of acquisition), including value added tax. This acquisition is being accounted for as an acquisition of assets and is included in the table below in “Other.” The remaining communications sites are expected to continue to close in tranches, subject to certain closing conditions.

Poland Acquisition—On June 16, 2020, the Company, through its Polish subsidiary, entered into a definitive agreement with Electronic Control Systems Spółka Akcyjna to acquire up to 50 communications sites in Poland for total consideration of 18.3 million Polish Zloty (“PLN”) ($4.6 million at the date of signing). During the year ended December 31, 2020, the Company completed the acquisition of 27 of these communications sites for total consideration of 12.1 million PLN ($3.1 million as of the dates of acquisition), including value added tax. This acquisition is being accounted for as an acquisition of assets and is included in the table below in “Other.” The remaining communications sites are expected to continue to close in tranches, subject to customary closing conditions.

Other Acquisitions—During the year ended December 31, 2020, the Company acquired a total of 1,299 communications sites, as well as other communications infrastructure assets, in the United States, France, Mexico, Peru and South Africa, including 564 sites in connection with the Company’s agreements with Orange S.A. (“Orange”) as further described below, for an aggregate purchase price of $978.0 million. Of the aggregate purchase price, $58.9 million is reflected as a payable in the consolidated balance sheet as of December 31, 2020. The majority of these acquisitions were accounted for as asset acquisitions and are included in the table below in “Other.”

The following table summarizes the allocations of the purchase prices for the fiscal year 2020 acquisitions based upon their estimated fair value at the date of acquisition:

<table><tr><td rowspan="2"></td><td colspan="2">InSite Acquisition</td><td colspan="2">Other (1)</td></tr><tr><td>$</td><td>57.2</td><td>$</td><td>40.6</td></tr><tr><td>Current assets</td><td></td><td>516.4</td><td></td><td>336.7</td></tr><tr><td>Property and equipment</td><td></td><td></td><td></td><td></td></tr><tr><td>Intangible assets (2):</td><td></td><td></td><td></td><td></td></tr><tr><td>Tenant-related intangible assets</td><td></td><td>1,160.1</td><td></td><td>596.5</td></tr><tr><td>Network location intangible assets</td><td></td><td>622.7</td><td></td><td>166.6</td></tr><tr><td>Other intangible assets</td><td></td><td>—</td><td></td><td>1.3</td></tr><tr><td>Other non-current assets</td><td></td><td>300.7</td><td></td><td>112.3</td></tr><tr><td>Current liabilities</td><td></td><td>(75.9)</td><td></td><td>(10.9)</td></tr><tr><td>Deferred tax liability</td><td></td><td>(116.3)</td><td></td><td>(9.8)</td></tr><tr><td>Other non-current liabilities</td><td></td><td>(267.6)</td><td></td><td>(114.5)</td></tr><tr><td>Net assets acquired</td><td></td><td>2,197.3</td><td></td><td>1,118.8</td></tr><tr><td>Goodwill (3)</td><td></td><td>1,354.2</td><td></td><td>—</td></tr><tr><td>Fair value of net assets acquired</td><td></td><td>3,551.5</td><td></td><td>1,118.8</td></tr><tr><td>Debt assumed (4)</td><td></td><td>(800.0)</td><td></td><td>—</td></tr><tr><td>Purchase price</td><td></td><td>2,751.5</td><td></td><td>1,118.8</td></tr></table>

(1) Includes 25 sites in Peru held pursuant to long-term finance leases.

(2) Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis generally over a 20 year period.

(3) The Company expects goodwill to be partially deductible for tax purposes.

(4) InSite Acquisition debt assumed includes $763.5 million of InSite’s indebtedness and a fair value adjustment of $36.5 million. The fair value adjustment was based primarily on reported market values using Level 2 inputs.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

In addition to the acquisitions discussed above, the Company purchased 103 towers related to the AT&T transaction described in note 19 for an aggregate purchase price of $55.7 million.

## Other Signed Acquisitions

Orange—On November 28, 2019, ATC France, a majority-owned subsidiary of the Company, entered into definitive agreements with Orange for the acquisition of up to approximately 2,000 communications sites in France over a period of up to five years for total consideration in the range of approximately 500.0 million Euros (“EUR”) to 600.0 million EUR (approximately $550.5 million to $660.5 million at the date of signing) to be paid over the five-year term. During the year ended December 31, 2020, the Company completed the acquisition of 564 of these communications sites. The remaining communications sites are expected to continue to close in tranches, subject to customary closing conditions.

## 2019 Transactions

Eaton Towers Acquisition—On December 31, 2019, the Company acquired 100% of the outstanding shares of Eaton Towers Holdings Limited (“Eaton Towers”), which owned and operated approximately 5,800 communications sites across five African markets (the “Eaton Towers Acquisition”). During the year ended December 31, 2020, the purchase price was reduced by approximately $4.2 million. The total consideration for the Eaton Towers Acquisition, including the Company’s assumption of Eaton Towers’ existing debt, was approximately $2.0 billion. The purchase price reflects a $14.0 million receivable from the seller for reimbursement of taxes. The Eaton Towers Acquisition was accounted for as a business combination and the allocation of the purchase price was finalized during the year ended December 31, 2020.

The following table summarizes the preliminary and final allocation of the purchase price paid and the amounts of assets acquired and liabilities assumed for the Eaton Towers Acquisition based upon its estimated fair value at the date of acquisition. Balances are reflected in the accompanying consolidated balance sheet as of December 31, 2020.

<table><tr><td></td><td colspan="2">Preliminary Allocation</td><td colspan="2">Final Allocation</td></tr><tr><td>Current assets</td><td>$     150.4</td><td>$     151.7</td><td></td><td></td></tr><tr><td>Property and equipment</td><td></td><td>304.7</td><td></td><td>306.6</td></tr><tr><td>Intangible assets (1):</td><td></td><td></td><td></td><td></td></tr><tr><td>Tenant-related intangible assets</td><td></td><td>1,007.6</td><td></td><td>1,107.7</td></tr><tr><td>Network location intangible assets</td><td></td><td>272.2</td><td></td><td>326.2</td></tr><tr><td>Other non-current assets</td><td></td><td>99.5</td><td></td><td>114.8</td></tr><tr><td>Current liabilities</td><td></td><td>(82.0)</td><td></td><td>(94.3)</td></tr><tr><td>Deferred tax liability</td><td></td><td>(319.3)</td><td></td><td>(347.2)</td></tr><tr><td>Other non-current liabilities</td><td></td><td>(138.3)</td><td></td><td>(121.3)</td></tr><tr><td>Net assets acquired</td><td></td><td>1,294.8</td><td></td><td>1,444.2</td></tr><tr><td>Goodwill (2)</td><td></td><td>670.0</td><td></td><td>516.4</td></tr><tr><td>Fair value of net assets acquired</td><td></td><td>1,964.8</td><td></td><td>1,960.6</td></tr><tr><td>Debt assumed</td><td></td><td>(329.8)</td><td></td><td>(329.8)</td></tr><tr><td>Purchase price</td><td></td><td>1,635.0</td><td>$     1,630.8</td><td></td></tr></table>

(1) Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis over periods of up to 20 years.
(2) The Company expects goodwill to be partially deductible for tax purposes.

## Pro Forma Consolidated Results (Unaudited)

The following table presents the unaudited pro forma financial results as if the 2020 acquisitions had occurred on January 1, 2019 and the 2019 acquisitions had occurred on January 1, 2018. The pro forma results do not include any anticipated cost synergies, costs or other integration impacts. Accordingly, such pro forma amounts are not necessarily indicative of the results that actually would have occurred had the transactions been completed on the dates indicated, nor are they indicative of the



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

future operating results of the Company.

<table><tr><td rowspan="2"></td><td colspan="3">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td></td></tr><tr><td>Pro forma revenues</td><td>$ 8,230.9</td><td>$ 8,083.8</td><td></td></tr><tr><td>Pro forma net income attributable to American Tower Corporation common stockholders</td><td>$ 1,515.7</td><td>$ 1,651.0</td><td></td></tr><tr><td>Pro forma net income per common share amounts:</td><td></td><td></td><td></td></tr><tr><td>Basic net income attributable to American Tower Corporation common stockholders</td><td>$ 3.42</td><td>$ 3.73</td><td></td></tr><tr><td>Diluted net income attributable to American Tower Corporation common stockholders</td><td>$ 3.40</td><td>$ 3.71</td><td></td></tr></table>

## 8. ACCRUED EXPENSES

Accrued expenses consisted of the following:

<table><tr><td rowspan="2"></td><td colspan="2">As of</td></tr><tr><td>December 31, 2020</td><td>December 31, 2019</td></tr><tr><td>Accrued construction costs</td><td>$ 46.5</td><td>$ 27.8</td></tr><tr><td>Accrued income tax payable</td><td>20.6</td><td>55.2</td></tr><tr><td>Accrued pass-through costs</td><td>67.1</td><td>74.2</td></tr><tr><td>Amounts payable for acquisitions</td><td>58.9</td><td>—</td></tr><tr><td>Amounts payable to tenants</td><td>66.4</td><td>77.9</td></tr><tr><td>Accrued property and real estate taxes</td><td>219.1</td><td>198.1</td></tr><tr><td>Accrued rent</td><td>82.6</td><td>75.6</td></tr><tr><td>Payroll and related withholdings</td><td>104.4</td><td>102.4</td></tr><tr><td>Other accrued expenses</td><td>378.1</td><td>347.0</td></tr><tr><td>Accrued expenses</td><td>$ 1,043.7</td><td>$ 958.2</td></tr></table>



## 9. LONG-TERM OBLIGATIONS

Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums, debt issuance costs and fair value adjustments due to interest rate swaps consisted of the following:

<table><tr><td rowspan="2"></td><td colspan="4">As of</td><td rowspan="2">Maturity Date (1)</td></tr><tr><td>December 31, 2020</td><td>December 31, 2019</td><td>Contractual Interest Rate (1)</td><td>N/A</td></tr><tr><td>2019 364-Day Term Loan (1) (2)</td><td>$ —</td><td>$ 999.9</td><td></td><td>N/A</td><td>N/A</td></tr><tr><td>2020 Term Loan (1) (3)</td><td>749.4</td><td>—</td><td>0.800 %</td><td>February 12, 2021</td><td></td></tr><tr><td>2019 Multicurrency Credit Facility (1)</td><td>—</td><td>700.0</td><td>— %</td><td>June 28, 2023</td><td></td></tr><tr><td>2019 Term Loan (1)</td><td>996.1</td><td>995.2</td><td>1.275 %</td><td>January 31, 2025</td><td></td></tr><tr><td>2019 Credit Facility (1)</td><td>2,295.0</td><td>1,600.0</td><td>1.235 %</td><td>January 31, 2025</td><td></td></tr><tr><td>2.800% senior notes (4)</td><td>—</td><td>749.4</td><td>N/A</td><td>N/A</td><td></td></tr><tr><td>3.300% senior notes (5)</td><td>—</td><td>748.5</td><td>N/A</td><td>N/A</td><td></td></tr><tr><td>3.450% senior notes (5)</td><td>—</td><td>647.7</td><td>N/A</td><td>N/A</td><td></td></tr><tr><td>5.900% senior notes (6)</td><td>—</td><td>498.9</td><td>N/A</td><td>N/A</td><td></td></tr><tr><td>2.250% senior notes</td><td>605.1</td><td>592.1</td><td>2.250 %</td><td>January 15, 2022</td><td></td></tr><tr><td>4.70% senior notes</td><td>699.0</td><td>698.2</td><td>4.700 %</td><td>March 15, 2022</td><td></td></tr><tr><td>3.50% senior notes</td><td>996.1</td><td>994.3</td><td>3.500 %</td><td>January 31, 2023</td><td></td></tr><tr><td>3.000% senior notes</td><td>721.9</td><td>704.9</td><td>3.000 %</td><td>June 15, 2023</td><td></td></tr><tr><td>0.600% senior notes</td><td>496.8</td><td>—</td><td>0.600 %</td><td>January 15, 2024</td><td></td></tr><tr><td>5.00% senior notes</td><td>1,001.3</td><td>1,001.7</td><td>5.000 %</td><td>February 15, 2024</td><td></td></tr><tr><td>3.375% senior notes</td><td>645.7</td><td>644.4</td><td>3.375 %</td><td>May 15, 2024</td><td></td></tr><tr><td>2.950% senior notes</td><td>643.1</td><td>641.3</td><td>2.950 %</td><td>January 15, 2025</td><td></td></tr><tr><td>2.400% senior notes</td><td>745.0</td><td>—</td><td>2.400 %</td><td>March 15, 2025</td><td></td></tr><tr><td>1.375% senior notes (7)</td><td>604.1</td><td>553.0</td><td>1.375 %</td><td>April 4, 2025</td><td></td></tr><tr><td>4.000% senior notes</td><td>744.3</td><td>743.2</td><td>4.000 %</td><td>June 1, 2025</td><td></td></tr><tr><td>1.300% senior notes</td><td>495.4</td><td>—</td><td>1.300 %</td><td>September 15, 2025</td><td></td></tr><tr><td>4.400% senior notes</td><td>497.1</td><td>496.6</td><td>4.400 %</td><td>February 15, 2026</td><td></td></tr><tr><td>1.950% senior notes (7)</td><td>605.2</td><td>554.4</td><td>1.950 %</td><td>May 22, 2026</td><td></td></tr><tr><td>3.375% senior notes</td><td>989.5</td><td>987.9</td><td>3.375 %</td><td>October 15, 2026</td><td></td></tr><tr><td>3.125% senior notes</td><td>397.9</td><td>397.6</td><td>3.125 %</td><td>January 15, 2027</td><td></td></tr><tr><td>2.750% senior notes</td><td>744.3</td><td>743.5</td><td>2.750 %</td><td>January 15, 2027</td><td></td></tr><tr><td>3.55% senior notes</td><td>744.8</td><td>744.1</td><td>3.550 %</td><td>July 15, 2027</td><td></td></tr><tr><td>0.500% senior notes (7)</td><td>907.4</td><td>—</td><td>0.500 %</td><td>January 15, 2028</td><td></td></tr><tr><td>3.600% senior notes</td><td>693.4</td><td>692.6</td><td>3.600 %</td><td>January 15, 2028</td><td></td></tr><tr><td>1.500% senior notes</td><td>645.1</td><td>—</td><td>1.500 %</td><td>January 31, 2028</td><td></td></tr><tr><td>3.950% senior notes</td><td>590.6</td><td>589.6</td><td>3.950 %</td><td>March 15, 2029</td><td></td></tr><tr><td>3.800% senior notes</td><td>1,633.5</td><td>1,631.7</td><td>3.800 %</td><td>August 15, 2029</td><td></td></tr><tr><td>2.900% senior notes</td><td>741.7</td><td>—</td><td>2.900 %</td><td>January 15, 2030</td><td></td></tr><tr><td>2.100% senior notes</td><td>740.2</td><td>—</td><td>2.100 %</td><td>June 15, 2030</td><td></td></tr><tr><td>1.875% senior notes</td><td>790.5</td><td>—</td><td>1.875 %</td><td>October 15, 2030</td><td></td></tr><tr><td>1.000% senior notes (7)</td><td>786.1</td><td>—</td><td>1.000 %</td><td>January 15, 2032</td><td></td></tr><tr><td>3.700% senior notes</td><td>591.9</td><td>591.8</td><td>3.700 %</td><td>October 15, 2049</td><td></td></tr><tr><td>3.100% senior notes</td><td>1,037.7</td><td>—</td><td>3.100 %</td><td>June 15, 2050</td><td></td></tr><tr><td>2.950% senior notes</td><td>538.2</td><td>—</td><td>2.950 %</td><td>January 15, 2051</td><td></td></tr><tr><td>Total American Tower Corporation debt</td><td>26,113.4</td><td>20,942.5</td><td></td><td></td><td></td></tr><tr><td>Series 2013-2A Securities (8)</td><td>1,296.6</td><td>1,295.0</td><td>3.070 %</td><td>March 15, 2023</td><td></td></tr><tr><td>Series 2018-1A Securities (8)</td><td>494.6</td><td>493.8</td><td>3.652 %</td><td>March 15, 2028</td><td></td></tr><tr><td>Series 2015-1 Notes (9)</td><td>—</td><td>349.6</td><td>N/A</td><td>N/A</td><td></td></tr><tr><td>Series 2015-2 Notes (10)</td><td>522.1</td><td>521.4</td><td>3.482 %</td><td>June 16, 2025</td><td></td></tr><tr><td>InSite Debt (11)</td><td>800.0</td><td>—</td><td>Various</td><td>Various</td><td></td></tr><tr><td>Other subsidiary debt (12)</td><td>32.9</td><td>422.4</td><td>Various</td><td>Various</td><td></td></tr><tr><td>Total American Tower subsidiary debt</td><td>3,146.2</td><td>3,082.2</td><td></td><td></td><td></td></tr></table>



AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

<table><tr><td>Finance lease obligations</td><td>27.9</td><td>30.7</td></tr><tr><td>Total</td><td>29,287.5</td><td>24,055.4</td></tr><tr><td>Less current portion of long-term obligations</td><td>(789.8)</td><td>(2,928.2)</td></tr><tr><td>Long-term obligations</td><td>$ 28,497.7</td><td>$ 21,127.2</td></tr></table>

(1) Accrues interest at a variable rate.

(2) Repair in full on February 13, 2020 using proceeds from the 2020 Term Loan (as defined below), borrowings from the 2019 Credit Facility (as defined below) and cash on hand.

(3) Repair in full on February 5, 2021 using borrowings from the 2019 Multiusury Credit Facility and cash on hand.

(4) Repair in full on May 11, 2020 with borrowings from the 2019 Credit Facility and cash on hand.

(5) Repair in full on July 6, 2020 with borrowings from the 2019 Credit Facility and cash on hand.

(6) Repair in full on January 15, 2020 with borrowings from the 2019 Credit Facility and cash on hand.

(7) Notes are denominated in EUR.
(8) Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2048.
(9) Repair in full on the June 2020 payment date with cash on hand.
(10) Maturity date reflects the anticipated repayment date; final legal maturity is June 15, 2050.
(11) Debt entered into by certain InSite subsidiaries acquired in connection with the InSite Acquisition (the "InSite Debt")
(12) Includes (a) the Colombian credit facility, which is denominated in Colombian Pesos (“COP”) and amortizes through April 24, 2021, (b) debt entered into by the Company’s Kenyan subsidiary in connection with an acquisition of sites in Kenya, which is denominated in U.S. Dollars (“USD”) and is payable either (i) in future installments subject to the satisfaction of specified conditions or (ii) three years from the note origination date, and (c) U.S. subsidiary debt related to a seller-financed acquisition. As of December 31, 2019, included (a) debt entered into by certain Eaton Towers subsidiaries acquired in connection with the Eaton Towers Acquisition (the “Eaton Towers Debt”), which was denominated in multiple currencies, including USD, EUR, Kenyan Shilling (“KES”) and West African CFA Franc (“XOF”) and was repaid during the year ended December 31, 2020, (b) the Brazil credit facility, which was denominated in Brazilian Reais (“BRL”) and was repaid on March 6, 2020, and (c) the South African credit facility, which was denominated in South African Rand (“ZAR”) and was repaid on the December 17, 2020 maturity date.

Current portion of long-term obligations—The Company’s current portion of long-term obligations primarily includes $750.0 million under its unsecured term loan entered into on February 13, 2020 (the “2020 Term Loan”).

## American Tower Corporation Debt

## Bank Facilities

During the year ended December 31, 2020, the Company increased the commitments under its senior unsecured multicurrency revolving credit facility, as amended and restated in December 2019 (the "2019 Multicurrency Credit Facility"), and its senior unsecured revolving credit facility, as amended and restated in December 2019 (the "2019 Credit Facility"), by $100.0 million each to $3.1 billion and $2.35 billion, respectively.

2019 Multicurrency Credit Facility—The Company has the ability to borrow up to $3.1 billion under the 2019 Multicurrency Credit Facility, which includes a $1.0 billion sublimit for multicurrency borrowings, a $200.0 million sublimit for letters of credit and a $50.0 million sublimit for swingline loans. During the year ended December 31, 2020, the Company borrowed an aggregate of $910.0 million EUR ($1.0 billion as of the borrowing dates) and repaid an aggregate of $1.8 billion, including $910.0 million EUR ($1.1 billion as of the repayment dates), of revolving indebtedness under the 2019 Multicurrency Credit Facility. The Company used the borrowings to repay existing indebtedness and for general corporate purposes.

2019 Credit Facility—The Company has the ability to borrow up to $2.35 billion under the 2019 Credit Facility, which includes a $200.0 million sublimit for letters of credit and a $50.0 million sublimit for swingline loans. During the year ended December 31, 2020, the Company borrowed an aggregate of $7.2 billion and repaid an aggregate of $6.5 billion of revolving indebtedness under the 2019 Credit Facility. The Company used the borrowings to fund acquisitions, including the InSite Acquisition, to repay existing indebtedness and for general corporate purposes.

2020 Term Loan—On February 13, 2020, the Company entered into the 2020 Term Loan, the net proceeds of which were used, together with borrowings under the 2019 Credit Facility and cash on hand, to repay all outstanding indebtedness under its $1.3 billion unsecured term loan entered into on February 14, 2019 (the "2019 364-Day Term Loan"). The 2020 Term Loan matures on February 12, 2021. Any outstanding principal and accrued but unpaid interest will be due and payable in full at maturity.

April 2020 Term Loan—On April 3, 2020, the Company entered into a $1.14 billion unsecured term loan due April 2, 2021, which was subsequently increased to $1.19 billion effective April 21, 2020 (the "April 2020 Term Loan"), the net proceeds of which were used to repay outstanding indebtedness under the 2019 Credit Facility. During the year ended December 31, 2020, the Company repaid all amounts outstanding under the April 2020 Term Loan with proceeds from the issuances of the 0.500% Notes, the 1.000% Notes, the 1.875% Notes and the Reopened 3.100% Notes (each as defined below).



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

The 2019 Multicurrency Credit Facility, the 2019 Credit Facility, the 2019 Term Loan and the 2020 Term Loan do not require amortization of principal and may be paid prior to maturity in whole or in part at the Company’s option without penalty or premium. The Company has the option of choosing either a defined base rate or LIBOR as the applicable base rate for borrowings under the 2019 Multicurrency Credit Facility, the 2019 Credit Facility, the 2019 Term Loan and the 2020 Term Loan. The interest rates on the 2019 Multicurrency Credit Facility, the 2019 Credit Facility, and the 2019 Term Loan range between 0.875% to 1.750% above LIBOR for LIBOR based borrowings or up to 0.750% above the defined base rate for base rate borrowings, in each case based upon the Company’s debt ratings. The interest rate on the 2020 Term Loan is 0.650% above LIBOR for LIBOR based borrowings or up to 0.000% above the defined base rate for base rate borrowings, in each case based upon the Company’s debt ratings.

As of December 31, 2020, the key terms under the 2019 Multicurrency Credit Facility, the 2019 Credit Facility, the 2019 Term Loan and the 2020 Term Loan were as follows:

<table><tr><td></td><td>Outstanding Principal Balance</td><td>Undrawn letters of credit</td><td>Maturity Date</td><td>Current margin over LIBOR</td><td>Current commitment fee (1)</td></tr><tr><td>2019 Multicurrency Credit Facility</td><td>—</td><td>$ 3.8</td><td>June 28, 2023 (3)</td><td>1.125 %</td><td>0.110 %</td></tr><tr><td>2019 Credit Facility</td><td>$ 2,295.0</td><td>$ 0.8</td><td>January 31, 2025 (3)</td><td>1.125 %</td><td>0.110 %</td></tr><tr><td>2019 Term Loan</td><td>$ 1,000.0 (2)</td><td>N/A</td><td>January 31, 2025</td><td>1.125 %</td><td>N/A</td></tr><tr><td>2020 Term Loan</td><td>$ 750.0 (2)</td><td>N/A</td><td>February 12, 2021</td><td>0.650 %</td><td>N/A</td></tr></table>

(1) Fee on undrawn portion of each credit facility.

(2) Borrowed at LIBOR

(3) Subject to two optional renewal periods.

The loan agreements for the 2019 Multicurrency Credit Facility, the 2019 Credit Facility, the 2019 Term Loan and the 2020 Term Loan contain certain reporting, information, financial and operating covenants and other restrictions (including limitations on additional debt, guaranties, sales of assets and liens) with which the Company must comply. Failure to comply with the financial and operating covenants of the loan agreements may constitute a default, which could result in, among other things, the amounts outstanding under the applicable agreement, including all accrued interest and unpaid fees, becoming immediately due and payable.

The Company’s bank facility activity subsequent to December 31, 2020 is described further in note 23.

## Senior Notes

## Repayments of Senior Notes

Repayment of 5.900% Senior Notes—On January 15, 2020, the Company redeemed all of the $500.0 million aggregate principal amount of 5.900% senior unsecured notes due 2021 at a price equal to 106.7090% of the principal amount, plus accrued and unpaid interest up to, but excluding January 15, 2020, for an aggregate redemption price of approximately $539.6 million, including $6.1 million in accrued and unpaid interest. The Company recorded a loss on retirement of long-term obligations of $34.6 million, which includes prepayment consideration of $33.5 million and the associated unamortized discount and deferred financing costs. The redemption was funded with borrowings under the 2019 Credit Facility and cash on hand.

Repayment of 2.800% Senior Notes—On May 11, 2020, the Company redeemed all of the $750.0 million aggregate principal amount of 2.800% senior unsecured notes due 2020 at a price equal to the principal amount, together with accrued interest up to, but excluding May 11, 2020, for an aggregate redemption price of approximately $759.3 million, including $9.3 million in accrued interest. The redemption was funded with borrowings under the 2019 Credit Facility and cash on hand.

Repayment of 3.450% Senior Notes and 3.300% Senior Notes—On July 6, 2020, the Company redeemed all of the $650.0 million aggregate principal amount of 3.450% senior unsecured notes due 2021 (the “3.450% Notes”) at a price equal to 103.5980% of the principal amount of the 3.450% Notes, plus accrued and unpaid interest up to, but excluding, July 6, 2020, for an aggregate redemption price of $680.3 million, including $6.9 million in accrued and unpaid interest. Also on July 6, 2020, the Company redeemed all of the $750.0 million aggregate principal amount of 3.300% senior unsecured notes due 2021 (the “3.300% Notes”) at a price equal to 101.5090% of the principal amount of the 3.300% Notes, plus accrued and unpaid interest up to, but excluding, July 6, 2020, for an aggregate redemption price of $771.0 million, including $9.7 million in accrued and unpaid interest.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

The Company recorded a loss on retirement of long-term obligations of approximately $37.2 million, which includes prepayment consideration of $34.7 million and the associated unamortized discount and deferred financing costs. The redemptions of the 3.450% Notes and the 3.300% Notes were funded with borrowings under the 2019 Credit Facility and cash on hand.

## Offerings of Senior Notes

2.400% Senior Notes and 2.900% Senior Notes Offering—On January 10, 2020, the Company completed a registered public offering of $750.0 million aggregate principal amount of 2.400% senior unsecured notes due 2025 (the “2.400% Notes”) and $750.0 million aggregate principal amount of 2.900% senior unsecured notes due 2030 (the “2.900% Notes”). The net proceeds from this offering were approximately $1,483.4 million, after deducting commissions and estimated expenses. The Company used the net proceeds to repay existing indebtedness under the 2019 Credit Facility. Accrued and unpaid interest is payable in U.S. Dollars semi-annually in arrears and will be computed from the offering date on the basis of a 360 day year comprised of twelve 30-day months, beginning on September 15, 2020 and July 15, 2020 for the 2.400% Notes and the 2.900% Notes, respectively.

1.300% Senior Notes, 2.100% Senior Notes and 3.100% Senior Notes Offering—On June 3, 2020, the Company completed a registered public offering of $500.0 million aggregate principal amount of 1.300% senior unsecured notes due 2025 (the “1.300% Notes”), $750.0 million aggregate principal amount of 2.100% senior unsecured notes due 2030 (the “2.100% Notes”) and $750.0 million aggregate principal amount of 3.100% senior unsecured notes due 2050 (the “Initial 3.100% Notes”). The net proceeds from this offering were approximately $1,968.2 million, after deducting commissions and estimated expenses. The Company used the net proceeds to repay existing indebtedness under the 2019 Credit Facility and for general corporate purposes. Accrued and unpaid interest is payable in U.S. Dollars semi-annually in arrears and will be computed from the offering date on the basis of a 360 day year comprised of twelve 30-day months, beginning on March 15, 2021, December 15, 2020 and December 15, 2020 for the 1.300% Notes, the 2.100% Notes and the Initial 3.100% Notes, respectively.

0.500% Senior Notes and 1.000% Senior Notes Offering—On September 10, 2020, the Company completed a registered public offering of 750.0 million EUR ($886.1 million at the date of issuance) aggregate principal amount of 0.500% senior unsecured notes due 2028 (the “0.500% Notes”) and 650.0 million EUR ($768.0 million at the date of issuance) aggregate principal amount of 1.000% senior unsecured notes due 2032 (the “1.000% Notes”). The net proceeds from this offering were approximately 1,385.2 million EUR ($1,636.6 million at the date of issuance), after deducting commissions and estimated expenses. The Company used the net proceeds to repay existing indebtedness under the 2019 Multicurrency Credit Facility and the April 2020 Term Loan and for general corporate purposes. Accrued and unpaid interest is payable in EUR annually in arrears and will be computed on the basis of the actual number of days in the period for which interest is being calculated and the actual number of days from and including the last date on which interest was paid on the notes, beginning on January 15, 2021 for each of the 0.500% Notes and the 1.000% Notes.

1.875% Senior Notes and 3.100% Senior Notes Offering—On September 28, 2020, the Company completed a registered public offering of $300.0 million aggregate principal amount through a reopening of the Initial 3.100% Notes (the “Reopened 3.100% Notes” and, collectively with the Initial 3.100% Notes, the “3.100% Notes”) and $800.0 million aggregate principal amount of 1.875% senior unsecured notes due 2030 (the “1.875% Notes”). The net proceeds from this offering were approximately $1,092.1 million, after deducting commissions and estimated expenses. The Company used the net proceeds to repay existing indebtedness under the 2019 Credit Facility and the April 2020 Term Loan. Accrued and unpaid interest is payable in U.S. Dollars semi-annually in arrears and will be computed from the offering date (which shall be June 3, 2020 for the Reopened 3.100% Notes) on the basis of a 360 day year comprised of twelve 30-day months, beginning on April 15, 2021 and December 15, 2020 for the 1.875% Notes and the Reopened 3.100% Notes, respectively.

0.600% Senior Notes, 1.500% Senior Notes and 2.950% Senior Notes Offering—On November 20, 2020, the Company completed a registered public offering of $500.0 million aggregate principal amount of 0.600% senior unsecured notes due 2024 (the “0.600% Notes”), $650.0 million aggregate principal amount of 1.500% senior unsecured notes due 2028 (the “1.500% Notes”) and $550.0 million aggregate principal amount of 2.950% senior unsecured notes due 2051 (the “2.950% Notes” and, collectively with the 2.400% Notes, the 2.900% Notes, the 1.300% Notes, the 2.100% Notes, the 3.100% Notes, the 0.500% Notes, the 1.000% Notes, the 1.875% Notes, the 0.600% Notes and the 1.500% Notes, the “Notes”). The net proceeds from this offering were approximately $1,678.9 million, after deducting commissions and estimated expenses. The Company used the net proceeds to repay existing indebtedness under the 2019 Credit Facility and for general corporate purposes including the funding of the InSite Acquisition. Accrued and unpaid interest is payable in U.S. Dollars semi-annually in arrears and will be computed from the offering date on the basis of a 360 day year comprised of twelve 30-day months, beginning on July 15, 2021, July 31, 2021 and July 15, 2021 for the 0.600% Notes, the 1.500% Notes and the 2.950% Notes, respectively.



## AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

The following table outlines key terms related to the Company’s outstanding senior notes as of December 31, 2020:

<table><tr><td rowspan="2"></td><td rowspan="2">Aggregate Principal Amount</td><td colspan="2">Adjustments to Principal Amount (1)</td><td rowspan="2">Interest payments due (2)</td><td rowspan="2">Issue Date</td><td rowspan="2">Par Call Date (3)</td></tr><tr><td>2020</td><td>2019</td></tr><tr><td>2.250% Notes (4)</td><td>$ 600.0</td><td>$ 5.1</td><td>$ (7.9)</td><td>January 15 and July 15</td><td>September 30, 2016</td><td>N/A</td></tr><tr><td>4.70% Notes</td><td>$ 700.0</td><td>(1.0)</td><td>(1.8)</td><td>March 15 and September 15</td><td>March 12, 2012</td><td>N/A</td></tr><tr><td>3.50% Notes</td><td>$ 1,000.0</td><td>(3.9)</td><td>(5.7)</td><td>January 31 and July 31</td><td>January 8, 2013</td><td>N/A</td></tr><tr><td>3.000% Notes (5)</td><td>$ 700.0</td><td>21.9</td><td>4.9</td><td>June 15 and December 15</td><td>December 8, 2017</td><td>N/A</td></tr><tr><td>0.600% Notes</td><td>$ 500.0</td><td>(3.2)</td><td>—</td><td>January 15 and July 15</td><td>November 20, 2020</td><td>N/A</td></tr><tr><td>5.00% Notes (6)</td><td>$ 1,000.0</td><td>1.3</td><td>1.7</td><td>February 15 and August 15</td><td>August 19, 2013</td><td>N/A</td></tr><tr><td>3.375% Notes</td><td>$ 650.0</td><td>(4.3)</td><td>(5.6)</td><td>May 15 and November 15</td><td>March 15, 2019</td><td>April 15, 2024</td></tr><tr><td>2.950% Notes</td><td>$ 650.0</td><td>(6.9)</td><td>(8.7)</td><td>January 15 and July 15</td><td>June 13, 2019</td><td>December 15, 2024</td></tr><tr><td>2.400% Notes</td><td>$ 750.0</td><td>(5.0)</td><td>—</td><td>March 15 and September 15</td><td>January 10, 2020</td><td>February 15, 2025</td></tr><tr><td>1.375% Notes (7)</td><td>$ 610.8</td><td>(6.7)</td><td>(7.6)</td><td>April 4</td><td>April 6, 2017</td><td>January 4, 2025</td></tr><tr><td>4.000% Notes</td><td>$ 750.0</td><td>(5.7)</td><td>(6.8)</td><td>June 1 and December 1</td><td>May 7, 2015</td><td>March 1, 2025</td></tr><tr><td>1.300% Notes</td><td>$ 500.0</td><td>(4.6)</td><td>—</td><td>March 15 and September 15</td><td>June 3, 2020</td><td>August 15, 2025</td></tr><tr><td>4.400% Notes</td><td>$ 500.0</td><td>(2.9)</td><td>(3.4)</td><td>February 15 and August 15</td><td>January 12, 2016</td><td>November 15, 2025</td></tr><tr><td>1.950% Notes (7)</td><td>$ 610.8</td><td>(5.6)</td><td>(6.2)</td><td>May 22</td><td>May 22, 2018</td><td>February 22, 2026</td></tr><tr><td>3.375% Notes</td><td>$ 1,000.0</td><td>(10.5)</td><td>(12.1)</td><td>April 15 and October 15</td><td>May 13, 2016</td><td>July 15, 2026</td></tr><tr><td>3.125% Notes</td><td>$ 400.0</td><td>(2.1)</td><td>(2.4)</td><td>January 15 and July 15</td><td>September 30, 2016</td><td>October 15, 2026</td></tr><tr><td>2.750% Notes</td><td>$ 750.0</td><td>(5.7)</td><td>(6.5)</td><td>January 15 and July 15</td><td>October 3, 2019</td><td>November 15, 2026</td></tr><tr><td>3.55% Notes</td><td>$ 750.0</td><td>(5.2)</td><td>(5.9)</td><td>January 15 and July 15</td><td>June 30, 2017</td><td>April 15, 2027</td></tr><tr><td>0.500% Notes (7)</td><td>$ 916.2</td><td>(8.8)</td><td>—</td><td>January 15</td><td>September 10, 2020</td><td>October 15, 2027</td></tr><tr><td>3.600% Notes</td><td>$ 700.0</td><td>(6.6)</td><td>(7.4)</td><td>January 15 and July 15</td><td>December 8, 2017</td><td>October 15, 2027</td></tr><tr><td>1.500% Notes</td><td>$ 650.0</td><td>(4.9)</td><td>—</td><td>January 31 and July 31</td><td>November 20, 2020</td><td>November 30, 2027</td></tr><tr><td>3.950% Notes</td><td>$ 600.0</td><td>(9.4)</td><td>(10.4)</td><td>March 15 and September 15</td><td>March 15, 2019</td><td>December 15, 2028</td></tr><tr><td>3.800% Notes</td><td>$ 1,650.0</td><td>(16.5)</td><td>(18.3)</td><td>February 15 and August 15</td><td>June 13, 2019</td><td>May 15, 2029</td></tr><tr><td>2.900% Notes</td><td>$ 750.0</td><td>(8.3)</td><td>—</td><td>January 15 and July 15</td><td>January 10, 2020</td><td>October 15, 2029</td></tr><tr><td>2.100% Notes</td><td>$ 750.0</td><td>(9.8)</td><td>—</td><td>June 15 and December 15</td><td>June 3, 2020</td><td>March 15, 2030</td></tr><tr><td>1.875% Notes</td><td>$ 800.0</td><td>(9.5)</td><td>—</td><td>April 15 and October 15</td><td>September 28, 2020</td><td>July 15, 2030</td></tr><tr><td>1.000% Notes (7)</td><td>$ 794.0</td><td>(7.9)</td><td>—</td><td>January 15</td><td>September 10, 2020</td><td>October 15, 2031</td></tr><tr><td>3.700% Notes</td><td>$ 600.0</td><td>(8.1)</td><td>(8.2)</td><td>April 15 and October 15</td><td>October 3, 2019</td><td>April 15, 2049</td></tr><tr><td>3.100% Notes (8)</td><td>$ 1,050.0</td><td>(12.3)</td><td>—</td><td>June 15 and December 15</td><td>June 3, 2020</td><td>December 15, 2049</td></tr><tr><td>2.950% Notes</td><td>$ 550.0</td><td>(11.8)</td><td>—</td><td>January 15 and July 15</td><td>November 20, 2020</td><td>July 15, 2050</td></tr></table>

(1) Includes unamortized discounts, premiums and debt issuance costs and fair value adjustments due to interest rate swaps.

(2) Interest payments are due semi-annually for each series of senior notes, except for the 1.375% Notes, the 1.950% Notes, the 0.500% Notes and the 1.000% Notes, for which interest payments are due annually.

(3) The Company may redeem the notes at any time, in whole or in part, at a redemption price equal to 100% of the principal amount of the notes plus a make-whole premium, together with accrued interest to the redemption date. If the Company redeems the notes on or after the par call date, the Company will not be required to pay a make-whole premium.

(4) Includes $6.3 million and ($5.9) million fair value adjustment due to interest rate swaps in 2020 and 2019, respectively.

(5) Includes $25.1 million and $9.2 million fair value adjustment due to interest rate swaps in 2020 and 2019, respectively.

(6) The original issue date for the 5.00% Notes was August 19, 2013. The issue date for the reopened 5.00% Notes was January 10, 2014.

(7) Notes are denominated in EUR.

(8) The original issue date for the Initial 3.100% Notes was June 3, 2020. The issue date for the Reopened 3.100% Notes was September 28, 2020.

The Company may redeem each series of senior notes at any time, subject to the terms of the applicable supplemental indenture, in whole or in part, at a redemption price equal to 100% of the principal amount of the notes plus a make-whole premium, as applicable, together with accrued interest to the redemption date. In addition, if the Company undergoes a change



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

of control and corresponding ratings decline, each as defined in the applicable supplemental indenture, it may be required to repurchase all of the applicable notes at a purchase price equal to 101% of the principal amount of such notes, plus accrued and unpaid interest (including additional interest, if any), up to but not including the repurchase date. The Notes rank equally with all of the Company’s other senior unsecured debt and are structurally subordinated to all existing and future indebtedness and other obligations of its subsidiaries.

Each applicable supplemental indenture for the Notes contains certain covenants that restrict the Company’s ability to merge, consolidate or sell assets and its (together with its subsidiaries’) ability to incur liens. These covenants are subject to a number of exceptions, including that the Company and its subsidiaries may incur certain liens on assets, mortgages or other liens securing indebtedness if the aggregate amount of indebtedness secured by such liens does not exceed 3.5x Adjusted EBITDA, as defined in the applicable supplemental indenture. As of December 31, 2020, the Company was in compliance with each of these covenants.

## American Tower Subsidiary Debt

## Securitizations

The Company has several securitizations in place. Cash flows generated by the sites that secure the securitized debt are only available for payment of such debt and are not available to pay the Company’s other obligations or the claims of its creditors. However, subject to certain restrictions, the Company holds the right to receive the excess cash flows not needed to pay the securitized debt and other obligations arising out of the securitizations. The securitized debt is the obligation of the issuers thereof or borrowers thereunder, as applicable, and their subsidiaries, and not of the Company or its other subsidiaries.

American Tower Secured Revenue Notes, Series 2015-1, Class 4 and Series 2015-2, Class A—In May 2015, GTP Acquisition Partners I, LLC (“GTP Acquisition Partners”), one of the Company’s wholly owned subsidiaries, refinanced existing debt with cash on hand and proceeds from a private issuance (the “2015 Securitization”) of $350.0 million of American Tower Secured Revenue Notes, Series 2015-1, Class A (the “Series 2015-1 Notes”) and $525.0 million of American Tower Secured Revenue Notes, Series 2015-2, Class A (the “Series 2015-2 Notes,” and together with the Series 2015-1 Notes, the “2015 Notes”).

The 2015 Notes were issued by GTP Acquisition Partners pursuant to a Third Amended and Restated Indenture and related series supplements, each dated as of May 29, 2015 (collectively, the “2015 Indenture”), between GTP Acquisition Partners and its subsidiaries (the “GTP Entities”) and The Bank of New York Mellon, as trustee. The effective weighted average life and interest rate of the 2015 Notes was 8.1 years and 3.029%, respectively, as of the date of issuance.

Repayment of Series 2015-1 Notes—On the June 2020 payment date, the Company repaid the entire $350.0 million aggregate principal amount outstanding under the Series 2015-1 Notes, pursuant to the terms of the agreements governing such securities. The repayment was funded with cash on hand.

The outstanding Series 2015-2 Notes are secured by (i) mortgages, deeds of trust and deeds to secure debt on substantially all of the 3,538 communications sites (the "2015 Secured Sites") owned by the GTP Entities and their operating cash flows, (ii) a security interest in substantially all of the personal property and fixtures of the GTP Entities, including GTP Acquisition Partners' equity interests in its subsidiaries and (iii) the rights of the GTP Entities under a management agreement. American Tower Holding Sub II, LLC, whose only material assets are its equity interests in GTP Acquisition Partners, has guaranteed repayment of the Series 2015-2 Notes and pledged its equity interests in GTP Acquisition Partners as security for such payment obligations.

Secured Tower Revenue Securities, Series 2013-2A, Secured Tower Revenue Securities, Series 2018-1, Subclass A and Series 2018-1, Subclass R—On March 29, 2018, the Company completed a securitization transaction (the "2018 Securitization"), in which the American Tower Trust I (the "Trust") issued $500.0 million aggregate principal amount of Secured Tower Revenue Securities, Series 2018-1, Subclass A (the "Series 2018-1A Securities"). To satisfy the applicable risk retention requirements of Regulation RR promulgated under the Securities Exchange Act of 1934, as amended (the "Exchange Act" and, such requirements, the "Risk Retention Rules"), the Trust issued, and one of the Company's affiliates purchased, $26.4 million aggregate principal amount of Secured Tower Revenue Securities, Series 2018-1, Subclass R (the "Series 2018-1R Securities" and, together with the Series 2018-1A Securities, the "2018 Securities") to retain an "eligible horizontal residual interest" (as defined in the Risk Retention Rules) in an amount equal to at least 5% of the fair value of the 2018 Securities.

The Secured Tower Revenue Securities, Series 2013-2A (the "Series 2013-2A Securities" and, together with the 2018 Securities the "Trust Securities") issued in a securitization transaction in March 2013 (the "2013 Securitization" and, together with the 2018 Securitization, the "Trust Securitizations") remain outstanding and are subject to the terms of the Second Amended and Restated Trust and Servicing Agreement entered into in connection with the 2018 Securitization.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

The assets of the Trust consist of a nonrecourse loan (the “Loan”) made by the Trust to American Tower Asset Sub, LLC and American Tower Asset Sub II, LLC (together, the “AMT Asset Subs”). The AMT Asset Subs are jointly and severally liable under the Loan, which is secured primarily by mortgages on the AMT Asset Subs’ interests in 5,114 broadcast and wireless communications towers and related assets (the “Trust Sites”).

The component of the Loan corresponding to the Series 2013-2A Securities also remains outstanding and is subject to the terms of the Second Amended and Restated Loan and Security Agreement among the Trust and the AMT Asset Subs, dated as of March 29, 2018 (the "Loan Agreement"). The Loan Agreement includes terms and conditions, including with respect to secured assets, substantially consistent with the First Amended and Restated Loan and Security Agreement dated as of March 15, 2013. The 2018 Securities correspond to components of the Loan made to the AMT Asset Subs pursuant to the Loan Agreement and were issued in two separate subclasses of the same series. The 2018 Securities represent a pass-through interest in the components of the Loan corresponding to the 2018 Securities. The Series 2018-1A Securities have an interest rate of 3.652% and the Series 2018-1R Securities have an interest rate of 4.459%. The 2018 Securities have an expected life of approximately ten years with a final repayment date in March 2048. Subject to certain limited exceptions described below, no payments of principal will be required to be made on the components of the Loan corresponding to the 2018 Securities prior to the monthly payment date in March 2028, which is the anticipated repayment date for such components.

The Loan is secured by (1) mortgages, deeds of trust and deeds to secure debt on substantially all of the Trust Sites and their operating cash flows, (2) a security interest in substantially all of the AMT Asset Subs' personal property and fixtures and (3) the AMT Asset Subs' rights under that certain management agreement among the AMT Asset Subs and SpectraSite Communications, LLC entered into in March 2013. American Tower Holding Sub, LLC (the "Guarantor"), whose only material assets are its equity interests in each of the AMT Asset Subs, and American Tower Guarantor Sub, LLC whose only material asset is its equity interests in the Guarantor, have each guaranteed repayment of the Loan and pledged their equity interests in their respective subsidiary or subsidiaries as security for such payment obligations.

Under the terms of the Loan Agreement and the 2015 Indenture, amounts due will be paid from the cash flows generated by the Trust Sites or the 2015 Secured Sites, respectively, which must be deposited into certain reserve accounts, and thereafter distributed solely pursuant to the terms of the Loan Agreement or 2015 Indenture, as applicable. On a monthly basis, after payment of all required amounts under the Loan Agreement or 2015 Indenture, as applicable, including interest payments, subject to the conditions described below, the excess cash flows generated from the operation of such assets are released to the AMT Asset Subs or GTP Acquisition Partners, as applicable, which can then be distributed to, and used by, the Company.

In order to distribute any excess cash flow to the Company, the AMT Asset Subs and GTP Acquisition Partners must each maintain a specified debt service coverage ratio (the "DSCR"), which is generally calculated as the ratio of the net cash flow (as defined in the applicable agreement) to the amount of interest, servicing fees and trustee fees required to be paid over the succeeding 12 months on the principal amount of the Loan or the 2015 Notes, as applicable, that will be outstanding on the payment date following such date of determination. If the DSCR were equal to or below 1.30x (the "Cash Trap DSCR") for any quarter, then all cash flow in excess of amounts required to make debt service payments, fund required reserves, pay management fees and budgeted operating expenses and make other payments required under the applicable transaction documents, referred to as excess cash flow, will be deposited into a reserve account (the "Cash Trap Reserve Account") instead of being released to the AMT Asset Subs or GTP Acquisition Partners, as applicable. The funds in the Cash Trap Reserve Account will not be released to the AMT Asset Subs or GTP Acquisition Partners, as applicable, unless the DSCR exceeds the Cash Trap DSCR for two consecutive calendar quarters.

Additionally, an “amortization period” commences if, as of the end of any calendar quarter, the DSCR is equal to or below 1.15x (the “Minimum DSCR”) and will continue to exist until the DSCR exceeds the Minimum DSCR for two consecutive calendar quarters. With respect to the Trust Securities, an “amortization period” also commences if, on the anticipated repayment date the component of the Loan corresponding to the applicable subclass of the Trust Securities has not been repaid in full, provided that such amortization period shall apply with respect to such component that has not been repaid in full. If the Series 2015-2 Notes have not been repaid in full on the applicable anticipated repayment date, additional interest will accrue on the unpaid principal balance of the Series 2015-2 Notes, and such notes will begin to amortize on a monthly basis from excess cash flow. During an amortization period, all excess cash flow and any amounts in the applicable Cash Trap Reserve Account would be applied to pay the principal of the Loan or the Series 2015-2 Notes, as applicable, on each monthly payment date.

The Loan and the Series 2015-2 Notes may be prepaid in whole or in part at any time, provided such payment is accompanied by the applicable prepayment consideration. If the prepayment occurs within 18 months of the anticipated repayment date with respect to the Series 2013-2A Securities or the Series 2015-2 Notes, or 36 months of the anticipated repayment date with respect to the Series 2018 Securities, no prepayment consideration is due.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

The Loan Agreement and the 2015 Indenture include operating covenants and other restrictions customary for transactions subject to rated securitizations. Among other things, the AMT Asset Subs and the GTP Entities, as applicable, are prohibited from incurring other indebtedness for borrowed money or further encumbering their assets subject to customary carve-outs for ordinary course trade payables and permitted encumbrances (as defined in the Loan Agreement or the 2015 Indenture, as applicable). The organizational documents of the AMT Asset Subs and the GTP Entities contain provisions consistent with rating agency securitization criteria for special purpose entities, including the requirement that they maintain independent directors. The Loan Agreement and the 2015 Indenture also contain certain covenants that require the AMT Asset Subs or GTP Acquisition Partners, as applicable, to provide the respective trustee with regular financial reports and operating budgets, promptly notify such trustee of events of default and material breaches under the Loan Agreement and other agreements related to the Trust Sites or the 2015 Indenture and other agreements related to the 2015 Secured Sites, as applicable, and allow the applicable trustee reasonable access to the sites, including the right to conduct site investigations.

A failure to comply with the covenants in the Loan Agreement or the 2015 Indenture could prevent the AMT Asset Subs or GTP Acquisition Partners, as applicable, from distributing excess cash flow to the Company. Furthermore, if the AMT Asset Subs or GTP Acquisition Partners were to default on the Loan or the Series 2015-2 Notes, the applicable trustee may seek to foreclose upon or otherwise convert the ownership of all or any portion of the Trust Sites or the 2015 Secured Sites, respectively, in which case the Company could lose the revenue associated with those assets. With respect to the Series 2015-2 Notes, upon the occurrence and during an event of default, the applicable trustee may, in its discretion or at the direction of holders of more than 50% of the aggregate outstanding principal of the Series 2015-2 Notes, declare such notes immediately due and payable, in which case any excess cash flow would need to be used to pay holders of such notes.

Further, under the Loan Agreement and the 2015 Indenture, the AMT Asset Subs or GTP Acquisition Partners, respectively, are required to maintain reserve accounts, including for ground rents, real estate and personal property taxes and insurance premiums, and, under the 2015 Indenture and in certain circumstances under the Loan Agreement, to reserve a portion of advance rents from tenants on the Trust Sites. Based on the terms of the Loan Agreement and the 2015 Indenture, all rental cash receipts received for each month are reserved for the succeeding month and held in an account controlled by the applicable trustee and then released. The $69.8 million held in the reserve accounts with respect to the Trust Securitizations and the $11.2 million held in the reserve accounts with respect to the 2015 Securitization as of December 31, 2020 are classified as Restricted cash on the Company’s accompanying consolidated balance sheets.

India Indebtedness—The India indebtedness includes several working capital facilities, most of which are subject to annual renewal. The working capital facilities bear interest at rates that consist of the applicable bank’s Marginal Cost of Funds based Lending Rate (as defined in the applicable agreement), plus a spread. Generally, the working capital facilities are payable on demand prior to maturity.

Amounts outstanding and key terms of the India indebtedness consisted of the following as of December 31, 2020 (in millions, except percentages):

<table><tr><td></td><td>Amount Outstanding (INR)</td><td>Amount Outstanding (USD)</td><td>Interest Rate (Range)</td><td>Maturity Date (Range)</td></tr><tr><td>Working capital facilities (1)</td><td>—</td><td>$ —</td><td>7.45% - 8.75%</td><td>March 18, 2021 - October 23, 2021</td></tr></table>

(1) 5.6 billion Indian Rupees (“INR”) ($76.9 million) of borrowing capacity as of December 31, 2020.

Other Subsidiary Debt—The Company’s other subsidiary debt as of December 31, 2020 includes (i) a long-term credit facility entered into by one of the Company’s Colombian subsidiaries in October 2014 (the “Colombian Credit Facility”), (ii) a note entered into by one of the Company’s subsidiaries in October 2018 in connection with the acquisition of sites in Kenya (the “Kenya Debt”), and (iii) U.S. subsidiary debt related to a seller-financed acquisition (the “U.S. Subsidiary Debt”).

As of December 31, 2019, other subsidiary debt also included (i) a credit facility entered into by one of the Company’s South African subsidiaries in December 2015, as amended (the “South African Credit Facility”), (ii) a credit facility entered into by one of the Company’s Brazilian subsidiaries in December 2014 (the “Brazil Credit Facility”) with Banco Nacional de Desenvolvimento Econômico e Social and (iii) the Eaton Towers Debt.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

Amounts outstanding and key terms of other subsidiary debt consisted of the following as of December 31, (in millions, except percentages):

<table><tr><td rowspan="2"></td><td colspan="2">Carrying Value (Denominated Currency) (1)</td><td colspan="2">Carrying Value (USD) (1)</td><td rowspan="2">Interest Rate</td><td rowspan="2">Maturity Date</td></tr><tr><td>2020</td><td>2019</td><td>2020</td><td>2019</td></tr><tr><td>South African Credit Facility (2)</td><td>—</td><td>288.7</td><td>$ —</td><td>$ 20.6</td><td>N/A</td><td>N/A</td></tr><tr><td>Colombian Credit Facility (3)</td><td>40,000.0</td><td>79,647.3</td><td>$ 11.6</td><td>$ 24.3</td><td>8.45 %</td><td>April 24, 2021</td></tr><tr><td>Brazil Credit Facility (4)</td><td>—</td><td>65.4</td><td>$ —</td><td>$ 16.2</td><td>Various</td><td>January 15, 2022</td></tr><tr><td>Kenya Debt (5)</td><td>20.1</td><td>29.6</td><td>$ 20.1</td><td>$ 29.6</td><td>8.00 %</td><td>October 1, 2021</td></tr><tr><td>U.S. Subsidiary Debt (6)</td><td>1.2</td><td>1.9</td><td>$ 1.2</td><td>$ 1.9</td><td>— %</td><td>January 1, 2022</td></tr><tr><td>Eaton Towers Debt (7):</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>USD Denominated</td><td>—</td><td>238.8</td><td>$ —</td><td>$ 238.8</td><td>N/A</td><td>N/A</td></tr><tr><td>EUR Denominated</td><td>—</td><td>26.2</td><td>$ —</td><td>$ 29.5</td><td>N/A</td><td>N/A</td></tr><tr><td>XOF Denominated</td><td>—</td><td>16,836.8</td><td>$ —</td><td>$ 28.8</td><td>N/A</td><td>N/A</td></tr><tr><td>KES Denominated</td><td>—</td><td>3,319.2</td><td>$ —</td><td>$ 32.7</td><td>N/A</td><td>N/A</td></tr></table>

(1) Includes applicable deferred financing costs.

(2) Denominated in ZAR, with an original principal amount of 830.0 million ZAR. On December 23, 2016, the borrower borrowed an additional 500.0 million ZAR. Debt accrued interest at a variable rate. On the December 17, 2020 maturity date, the Company repaid all outstanding amounts under the South African Credit Facility.

(3) Denominated in COP, with an original principal amount of 200.0 billion COP. Debt accrues interest at a variable rate. The loan agreement for the Colombian Credit Facility requires that the borrower manage exposure to variability in interest rates on certain of the amounts outstanding under the Colombian Credit Facility. The borrower no longer maintains the ability to draw on the Colombian Credit Facility.

(4) Denominated in BRL, with an original principal amount of 271.0 million BRL. Debt accrued interest at a variable rate. On March 6, 2020, the Company repaid all outstanding amounts under the Brazil Credit Facility.

(5) Denominated in USD, with an original principal amount of $51.8 million. The loan agreement for the Kenya Debt requires that the debt be paid either (i) in future installments subject to the satisfaction of specified conditions or (ii) three years from the note origination date with an optional two year extension.

(6) Related to a seller-financed acquisition. Denominated in USD with an original principal amount of $2.5 million.

(7) Related to the Eaton Towers Acquisition. Denominated in multiple currencies, including USD, EUR, KES and XOF. During the year ended December 31, 2020, the Company repaid all of the outstanding Eaton Towers Debt.

Pursuant to the agreement governing the Colombian Credit Facility, payments of principal and interest are generally payable quarterly in arrears. Outstanding principal and accrued but unpaid interest will be due and payable in full at maturity. The Colombian Credit Facility may be prepaid in whole or in part at any time, subject to certain limitations and prepayment consideration.

The Colombian Credit Facility is secured by, among other things, liens on towers owned by the applicable borrower.

Each of the agreements governing the other subsidiary debt contains contractual covenants and other restrictions. Failure to comply with certain of the financial and operating covenants could constitute a default under the applicable debt agreement, which could result in, among other things, the amounts outstanding, including all accrued interest and unpaid fees, becoming immediately due and payable.

InSite Debt—The InSite Debt includes securitizations entered into by certain InSite subsidiaries. The Company acquired this debt in connection with the InSite Acquisition. The InSite Debt was recorded at fair value upon acquisition. On January 15, 2021, the Company repaid the entire amount outstanding under the InSite Debt, plus accrued and unpaid interest up to, but excluding, January 15, 2021, for an aggregate redemption price of $826.4 million, including $2.3 million in accrued and unpaid interest. The Company recorded a loss on retirement of long-term obligations of approximately $24.5 million, which consists of prepayment consideration offset by the unamortized fair value adjustment recorded upon acquisition. The repayment of the InSite Debt was funded with borrowings from the 2019 Multicurrency Credit Facility and the 2019 Credit Facility, and cash on hand.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

As of December 31, 2020, the key terms were as follows:

<table><tr><td rowspan="2"></td><td colspan="2">Carrying Value</td><td rowspan="2">Interest Rate</td><td rowspan="2">Maturity Date</td></tr><tr><td>2020</td><td>2019</td></tr><tr><td>2016-1 Securitized Debt (1)</td><td></td><td></td><td></td><td></td></tr><tr><td>Series 2016-1A Class A</td><td>$ 218.0</td><td>$ —</td><td>2.883 %</td><td>November 15, 2023</td></tr><tr><td>Series 2016-1A Class B</td><td>22.4</td><td>—</td><td>4.557 %</td><td>November 15, 2023</td></tr><tr><td>Series 2016-1A Class C</td><td>75.7</td><td>—</td><td>6.414 %</td><td>November 15, 2023</td></tr><tr><td>2018-1 Securitized Debt (2)</td><td></td><td></td><td></td><td></td></tr><tr><td>Series 2018-1A Class A</td><td>235.4</td><td>—</td><td>4.103 %</td><td>December 15, 2025</td></tr><tr><td>Series 2018-1A Class B</td><td>60.5</td><td>—</td><td>4.844 %</td><td>December 15, 2025</td></tr><tr><td>Series 2018-1A Class C</td><td>22.8</td><td>—</td><td>6.115 %</td><td>December 15, 2025</td></tr><tr><td>2020-1 Securitized Debt (3)</td><td></td><td></td><td></td><td></td></tr><tr><td>Series 2020-1A Class A</td><td>121.5</td><td>—</td><td>1.496 %</td><td>September 15, 2025</td></tr><tr><td>Series 2020-1A Class B</td><td>21.7</td><td>—</td><td>2.488 %</td><td>September 15, 2025</td></tr><tr><td>Series 2020-1A Class C</td><td>22.0</td><td>—</td><td>4.213 %</td><td>September 15, 2025</td></tr><tr><td>Total InSite Debt</td><td>$ 800.0</td><td>$ —</td><td></td><td></td></tr></table>

(1) Maturity dates reflect the anticipated repayment dates; final legal maturity is November 15, 2046.

(2) Maturity dates reflect the anticipated repayment dates; final legal maturity is December 15, 2048.

(3) Maturity dates reflect the anticipated repayment dates; final legal maturity is September 15, 2050.

Finance Lease Obligations—The Company’s finance lease obligations approximated $27.9 million and $30.7 million as of December 31, 2020 and 2019, respectively. Finance lease obligations are described further in note 4.

Maturities—Aggregate principal maturities of long-term debt, including finance leases, for the next five years and thereafter are expected to be:

<table><tr><td>Fiscal Year</td><td>Amount</td></tr><tr><td>2021</td><td>$ 789.8</td></tr><tr><td>2022</td><td>1,304.6</td></tr><tr><td>2023</td><td>3,318.9</td></tr><tr><td>2024</td><td>2,151.9</td></tr><tr><td>2025</td><td>7,566.0</td></tr><tr><td>Thereafter</td><td>14,331.5</td></tr><tr><td>Total cash obligations</td><td>29,462.7</td></tr><tr><td>Unamortized discounts, premiums and debt issuance costs and fair value adjustments, net</td><td>(175.2)</td></tr><tr><td>Balance as of December 31, 2020</td><td>$ 29,287.5</td></tr></table>

## 10. OTHER NON-CURRENT LIABILITIES

Other non-current liabilities consisted of the following:

<table><tr><td rowspan="2"></td><td colspan="3">As of</td></tr><tr><td>December 31, 2020</td><td>December 31, 2019</td><td></td></tr><tr><td>Unearned revenue</td><td>$ 576.1</td><td>$ 525.9</td><td></td></tr><tr><td>Other miscellaneous liabilities</td><td>408.5</td><td>411.1</td><td></td></tr><tr><td>Other non-current liabilities</td><td>$ 984.6</td><td>$ 937.0</td><td></td></tr></table>



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

## 11. ASSET RETIREMENT OBLIGATIONS

The changes in the carrying amount of the Company’s asset retirement obligations were as follows:

<table><tr><td></td><td>2020</td><td>2019</td></tr><tr><td>Beginning balance as of January 1,</td><td>$ 1,384.1</td><td>$ 1,210.0</td></tr><tr><td>Additions</td><td>94.2</td><td>61.8</td></tr><tr><td>Accretion expense</td><td>90.8</td><td>81.6</td></tr><tr><td>Revisions in estimates (1)</td><td>8.3</td><td>56.8</td></tr><tr><td>Settlements</td><td>(6.1)</td><td>(26.1)</td></tr><tr><td>Balance as of December 31,</td><td>$ 1,571.3</td><td>$ 1,384.1</td></tr></table>

(1) Revisions in estimates include decreases to the liability of $42.1 million and $6.7 million related to foreign currency translation for the years ended December 31, 2020 and 2019, respectively.

As of December 31, 2020, the estimated undiscounted future cash outlay for asset retirement obligations was $3.7 billion.

## 12. FAIR VALUE MEASUREMENTS

The Company determines the fair value of its financial instruments based on the fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Below are the three levels of inputs that may be used to measure fair value:

Level 1 Quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.

Level 2 Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3 Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Items Measured at Fair Value on a Recurring Basis—The fair values of the Company’s financial assets and liabilities that are required to be measured on a recurring basis at fair value were as follows:

<table><tr><td rowspan="3"></td><td colspan="3">December 31, 2020</td><td colspan="3">December 31, 2019</td></tr><tr><td colspan="3">Fair Value Measurements Using</td><td colspan="3">Fair Value Measurements Using</td></tr><tr><td>Level 1</td><td>Level 2</td><td>Level 3</td><td>Level 1</td><td>Level 2</td><td>Level 3</td></tr><tr><td>Assets:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Interest rate swap agreements</td><td>—</td><td>$ 29.2</td><td>—</td><td>—</td><td>$ 9.0</td><td>—</td></tr><tr><td>Embedded derivative in lease agreement</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>$ 10.7</td></tr><tr><td>Liabilities:</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Interest rate swap agreements</td><td>—</td><td>$ 0.1</td><td>—</td><td>—</td><td>$ 7.5</td><td>—</td></tr><tr><td>Fair value of debt related to interest rate swap agreements (1)</td><td>$ 31.4</td><td>—</td><td>—</td><td>$ 3.3</td><td>—</td><td>—</td></tr></table>

(1) Included in the carrying values of the corresponding debt obligations.

## Interest Rate Swap Agreements

The fair value of the Company’s interest rate swap agreements is determined using pricing models with inputs that are observable in the market or can be derived principally from, or corroborated by, observable market data. For derivative instruments that are designated and qualify as fair value hedges, changes in the value of the derivatives are recognized in the consolidated statements of operations in the current period, along with the offsetting gain or loss on the hedged item attributable to the hedged risk. For derivative instruments that are designated and qualify as cash flow hedges, the Company records the change in fair value for the effective portion of the cash flow hedges in AOCL in the consolidated balance sheets and reclassifies a portion of the value from AOCL into Interest expense on a quarterly basis as the cash flows from the hedged item



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

affects earnings. The Company records the settlement of interest rate swap agreements in (Loss) gain on retirement of long-term obligations in the consolidated statements of operations in the period in which the settlement occurs.

The Company entered into three interest rate swap agreements with an aggregate notional value of $500.0 million related to the 3.000% senior unsecured notes due 2023 (the “3.000% Notes”). These interest rate swaps, which were designated as fair value hedges at inception, were entered into to hedge against changes in fair value of the 3.000% Notes resulting from changes in interest rates. The interest rate swap agreements require the Company to pay interest at a variable interest rate of one-month LIBOR plus applicable spreads and to receive fixed interest at a rate of 3.000% through June 15, 2023.

The Company entered into three interest rate swap agreements with an aggregate notional value of $600.0 million related to the 2.250% senior unsecured notes due 2022 (the “2.250% Notes”). These interest rate swaps, which were designated as fair value hedges at inception, were entered into to hedge against changes in fair value of the 2.250% Notes resulting from changes in interest rates. The interest rate swap agreements require the Company to pay interest at a variable interest rate of one-month LIBOR plus applicable spreads and to receive fixed interest at a rate of 2.250% through January 15, 2022.

The fair value of the U.S. interest rate swap asset of $29.2 million was included in Other non-current assets on the consolidated balance sheets at December 31, 2020. The fair values of the U.S. interest rate swap asset of $9.0 million and U.S. interest rate swap liability of $7.4 million were included in Other non-current assets and Other non-current liabilities, respectively, on the consolidated balance sheets at December 31, 2019. During the year ended December 31, 2020, the Company recorded net fair value adjustments of $0.4 million related to interest rate swaps and the change in fair value of debt due to interest rate swaps in Other expense in the consolidated statements of operations.

One of the Company’s Colombian subsidiaries is party to an interest rate swap agreement with certain lenders under the Colombian Credit Facility (the “Colombia Interest Rate Swap”). The Colombia Interest Rate Swap, which was designated as a cash flow hedge at inception, was entered into to manage exposure to variability in interest rates on debt. The Colombia Interest Rate Swap requires the payment of a fixed interest rate of 5.37% and pays variable interest at the three-month Inter-bank Rate through the earlier of termination of the underlying debt or April 24, 2021. As of December 31, 2020, the aggregate notional amount of the Colombia Interest Rate Swap was 30.0 billion COP ($8.7 million). The fair value of the Colombia Interest Rate Swap as of December 31, 2020 and 2019 was less than $0.1 million and $0.1 million, respectively, and was included in Other non-current liabilities on the consolidated balance sheets.

## Embedded Derivative in Lease Agreement

In connection with the acquisition of communications sites in Nigeria, the Company entered into a site lease agreement where a portion of the monthly rent to be received is escalated based on an index outside the lessor’s economic environment. The fair value of the portion of the lease tied to the U.S. CPI was $14.6 million at the date of acquisition and was recorded in Notes receivable and other non-current assets on the consolidated balance sheets. During the year ended December 31, 2020, the Company recorded an adjustment to the embedded derivative of $10.2 million, which is included in Other income (expense) in the consolidated statements of operations. As of December 31, 2020, the Company had no embedded derivatives outstanding.

## Redeemable Noncontrolling Interests

The Company records the carrying amount of the redeemable noncontrolling interests as described in note 15.

## Items Measured at Fair Value on a Nonrecurring Basis

Assets Held and Used—The Company’s long-lived assets are recorded at amortized cost and, if impaired, are adjusted to fair value using Level 3 inputs.

During the year ended December 31, 2020, certain long-lived assets held and used with a carrying value of $24.1 billion were written down to their net realizable value as a result of an asset impairment charge of $222.8 million. During the year ended December 31, 2019, certain long-lived assets held and used with a carrying value of $22.4 billion were written down to their net realizable value as a result of an asset impairment charge of $94.2 million. The asset impairment charges are recorded in Other operating expenses in the accompanying consolidated statements of operations. These adjustments were determined by comparing the estimated fair value utilizing projected future discounted cash flows to be provided from the long-lived assets to the asset’s carrying value.

There were no other items measured at fair value on a nonrecurring basis during the year ended December 31, 2020.

Fair Value of Financial Instruments—The Company’s financial instruments for which the carrying value reasonably approximates fair value at December 31, 2020 and 2019 include cash and cash equivalents, restricted cash, accounts receivable



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

and accounts payable. The Company’s estimates of fair value of its long-term obligations, including the current portion, are based primarily upon reported market values. For long-term debt not actively traded, fair value is estimated using either indicative price quotes or a discounted cash flow analysis using rates for debt with similar terms and maturities. As of December 31, 2020, the carrying value and fair value of long-term obligations, including the current portion, were $29.3 billion and $31.4 billion, respectively, of which $24.0 billion was measured using Level 1 inputs and $7.4 billion was measured using Level 2 inputs. As of December 31, 2019, the carrying value and fair value of long-term obligations, including the current portion, were $24.1 billion and $25.0 billion, respectively, of which $17.5 billion was measured using Level 1 inputs and $7.5 billion was measured using Level 2 inputs.

## 13. INCOME TAXES

Beginning in the taxable year ended December 31, 2012, the Company has filed, and intends to continue to file, U.S. federal income tax returns as a REIT, and its domestic TRSs filed, and intend to continue to file, separate tax returns as required. The Company also files tax returns in various states and countries. The Company’s state tax returns reflect different combinations of the Company’s subsidiaries and are dependent on the connection each subsidiary has with a particular state and form of organization. The following information pertains to the Company’s income taxes on a consolidated basis.

The income tax provision from continuing operations consisted of the following:

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020</td><td colspan="2">2019</td><td>2018</td></tr><tr><td>Current:</td><td></td><td></td><td></td><td></td></tr><tr><td>Federal</td><td>$     8.7</td><td>$      (1.7)</td><td>$      (1.4)</td><td></td></tr><tr><td>State</td><td>(10.7)</td><td>(5.0)</td><td>(1.8)</td><td></td></tr><tr><td>Foreign</td><td>(150.1)</td><td>(48.2)</td><td>(189.7)</td><td></td></tr><tr><td>Deferred:</td><td></td><td></td><td></td><td></td></tr><tr><td>Federal</td><td>(1.0)</td><td>1.4</td><td>4.0</td><td></td></tr><tr><td>State</td><td>(1.0)</td><td>0.5</td><td>0.7</td><td></td></tr><tr><td>Foreign</td><td>24.5</td><td>53.2</td><td>298.3</td><td></td></tr><tr><td>Income tax (provision) benefit</td><td>$    (129.6)</td><td>$     0.2</td><td>$     110.1</td><td></td></tr></table>

The effective tax rate (“ETR”) on income from continuing operations for the years ended December 31, 2020, 2019 and 2018 differs from the federal statutory rate primarily due to the Company’s qualification for taxation as a REIT, as well as adjustments for state and foreign items. As a REIT, the Company may deduct earnings distributed to stockholders against the income generated by its REIT operations. In addition, the Company is able to offset certain income by utilizing its remaining NOLs, subject to specified limitations.

In 2019, there was an income tax law change in India that allows companies to elect into an optional concessional tax regime. The new regime allows for a lower effective tax rate from approximately 35% to approximately 25% and no minimum alternative tax, while disallowing the benefit of the minimum alternative tax credits. As a result, the Company recorded a $113.0 million one-time tax benefit during the year ended December 31, 2019 arising from revaluing its net deferred tax liability.

In 2018, the income tax benefit was attributable to impairment charges and accelerated amortization on intangible assets taken in India as well as a benefit of $85.7 million related to the restructuring of international operations in certain jurisdictions. These benefits were partially offset by the receipt of the payment related to the Tata settlement.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

Reconciliation between the U.S. statutory rate and the effective rate from continuing operations is as follows:

<table><tr><td rowspan="2"></td><td colspan="3">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>Statutory tax rate</td><td>21 %</td><td>21 %</td><td>21 %</td></tr><tr><td>Adjustment to reflect REIT status (1)</td><td>(21)</td><td>(21)</td><td>(21)</td></tr><tr><td>Foreign taxes</td><td>4</td><td>3</td><td>(8)</td></tr><tr><td>Foreign withholding taxes</td><td>3</td><td>3</td><td>4</td></tr><tr><td>Uncertain tax positions</td><td>1</td><td>1</td><td>—</td></tr><tr><td>Changes in tax laws</td><td>—</td><td>(6)</td><td>—</td></tr><tr><td>Impact from restructuring</td><td>—</td><td>(1)</td><td>(6)</td></tr><tr><td>Changes in valuation allowance</td><td>(1)</td><td>—</td><td>—</td></tr><tr><td>Effective tax rate</td><td>7 %</td><td>(0)%</td><td>(10)%</td></tr></table>

(1) As a result of the ability to utilize the dividends paid deduction to offset the Company’s REIT income and gains.

The domestic and foreign components of income from continuing operations before income taxes are as follows:

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td>2018</td><td></td></tr><tr><td>United States</td><td>$ 1,683.0</td><td>$ 1,527.0</td><td>$ 1,212.7</td><td></td></tr><tr><td>Foreign</td><td>138.1</td><td>389.4</td><td>(58.1)</td><td></td></tr><tr><td>Total</td><td>$ 1,821.1</td><td>$ 1,916.4</td><td>$ 1,154.6</td><td></td></tr></table>

The components of the net deferred tax asset and liability and related valuation allowance were as follows:

<table><tr><td></td><td>December 31, 2020</td><td>December 31, 2019</td></tr><tr><td>Assets:</td><td></td><td></td></tr><tr><td>Operating lease liability</td><td>$ 837.1</td><td>$ 878.5</td></tr><tr><td>Net operating loss carryforwards</td><td>327.1</td><td>356.6</td></tr><tr><td>Accrued asset retirement obligations</td><td>187.8</td><td>174.9</td></tr><tr><td>Stock-based compensation</td><td>9.2</td><td>5.6</td></tr><tr><td>Unearned revenue</td><td>34.6</td><td>31.7</td></tr><tr><td>Unrealized loss on foreign currency</td><td>4.9</td><td>3.8</td></tr><tr><td>Other accruals and allowances</td><td>83.4</td><td>65.6</td></tr><tr><td>Nondeductible interest</td><td>60.9</td><td>15.9</td></tr><tr><td>Items not currently deductible and other</td><td>65.8</td><td>10.2</td></tr><tr><td>Liabilities:</td><td></td><td></td></tr><tr><td>Depreciation and amortization</td><td>(1,140.3)</td><td>(1,040.3)</td></tr><tr><td>Right-of-use asset</td><td>(824.0)</td><td>(865.1)</td></tr><tr><td>Deferred rent</td><td>(92.9)</td><td>(79.7)</td></tr><tr><td>Investment in affiliate (1)</td><td>(60.4)</td><td>—</td></tr><tr><td>Other</td><td>(1.1)</td><td>—</td></tr><tr><td>Subtotal</td><td>(507.9)</td><td>(442.3)</td></tr><tr><td>Valuation allowance</td><td>(228.5)</td><td>(194.2)</td></tr><tr><td>Net deferred tax liabilities</td><td>$ (736.4)</td><td>$ (636.5)</td></tr></table>

(1) Includes basis difference associated with investment in subsidiary related to the InSite Acquisition.

The Company provides valuation allowances if, based on the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. Management assesses the available evidence to estimate if sufficient future taxable



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

income will be generated to use the existing deferred tax assets. Valuation allowances may be reversed if, based on changes in facts and circumstances, the net deferred tax assets have been determined to be realizable.

At December 31, 2020 and 2019, the Company has provided a valuation allowance of $228.5 million and $194.2 million, respectively, which primarily relates to foreign items. The increase in the valuation allowance for the year ending December 31, 2020 is due to uncertainty as to the timing of, and the Company's ability to recover, net deferred tax assets in certain foreign operations in the foreseeable future, offset by reversals and fluctuations in foreign currency exchange rates. The amount of deferred tax assets considered realizable, however, could be adjusted if objective evidence in the form of cumulative losses is no longer present and additional weight may be given to subjective evidence such as the Company's projections for growth.

A summary of the activity in the valuation allowance is as follows:

<table><tr><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>Balance as of January 1,</td><td>$ 194.2</td><td>$ 151.9</td><td>$ 142.0</td></tr><tr><td>Additions (1)</td><td>64.7</td><td>42.5</td><td>15.7</td></tr><tr><td>Usage, expiration and reversals</td><td>(22.0)</td><td>—</td><td>—</td></tr><tr><td>Foreign currency translation</td><td>(8.4)</td><td>(0.2)</td><td>(5.8)</td></tr><tr><td>Balance as of December 31,</td><td>$ 228.5</td><td>$ 194.2</td><td>$ 151.9</td></tr></table>

(1) Includes net charges to expense and allowances established due to acquisition.

The recoverability of the Company’s deferred tax assets has been assessed utilizing projections based on its current operations. Accordingly, the recoverability of the deferred tax assets is not dependent on material asset sales or other non-routine transactions. Based on its current outlook of future taxable income during the carryforward period, the Company believes that deferred tax assets, other than those for which a valuation allowance has been recorded, will be realized.

At December 31, 2020, the Company had net federal, state and foreign operating loss carryforwards available to reduce future taxable income. If not utilized, the Company’s NOLs expire as follows:

<table><tr><td>Years ended December 31,</td><td>Federal</td><td>State</td><td>Foreign</td></tr><tr><td>2021 to 2025</td><td>$ 141.6</td><td>$ 180.2</td><td>$ 12.4</td></tr><tr><td>2026 to 2030</td><td>0.0</td><td>193.7</td><td>85.6</td></tr><tr><td>2031 to 2035</td><td>9.5</td><td>48.7</td><td>3.5</td></tr><tr><td>2036 to 2040</td><td>61.7</td><td>183.0</td><td>—</td></tr><tr><td>Indefinite carryforward</td><td>142.1</td><td>47.7</td><td>679.5</td></tr><tr><td>Total</td><td>$ 354.9</td><td>$ 653.3</td><td>$ 781.0</td></tr></table>

As of December 31, 2020 and 2019, the total amount of unrecognized tax benefits that would impact the ETR, if recognized, is $105.9 million and $158.1 million, respectively. The amount of unrecognized tax benefits for the year ended December 31, 2020 includes additions to the Company’s existing tax positions of $26.2 million.

The Company expects the unrecognized tax benefits to change over the next 12 months if certain tax matters ultimately settle with the applicable taxing jurisdiction during this timeframe, or if the applicable statute of limitations lapses. The impact of the amount of such changes to previously recorded uncertain tax positions could range from zero to $32.7 million.

A reconciliation of the beginning and ending amount of unrecognized tax benefits are as follows:

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td>2018</td><td></td></tr><tr><td>Balance at January 1</td><td>$ 175.6</td><td>$ 107.7</td><td>$ 116.7</td><td></td></tr><tr><td>Additions based on tax positions related to the current year</td><td>4.7</td><td>33.3</td><td>8.1</td><td></td></tr><tr><td>Additions and reductions for tax positions of prior years (1)</td><td>(5.0)</td><td>37.5</td><td>0.3</td><td></td></tr><tr><td>Foreign currency</td><td>(9.6)</td><td>(1.6)</td><td>(8.1)</td><td></td></tr><tr><td>Reduction as a result of the lapse of statute of limitations</td><td>(26.0)</td><td>(1.3)</td><td>(2.6)</td><td></td></tr><tr><td>Reduction as a result of effective settlements</td><td>(3.5)</td><td>—</td><td>(6.7)</td><td></td></tr><tr><td>Balance at December 31</td><td>$ 136.2</td><td>$ 175.6</td><td>$ 107.7</td><td></td></tr></table>



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

(1) Year ended December 31, 2020 includes adjustments of $(21.0) million for positions related to the Eaton Towers Acquisition that were revised in connection with settlements or effective settlements.

During the year ended December 31, 2020, the statute of limitations on certain unrecognized tax benefits lapsed and certain positions were effectively settled, including effective settlements and revisions of prior year positions related to the Eaton Towers Acquisition, which resulted in a decrease in the liability for unrecognized tax benefits of $50.5 million. During the years ended December 31, 2019 and 2018, the statute of limitations on certain unrecognized tax benefits lapsed and certain positions were effectively settled, which resulted in decreases of $2.5 million and $9.3 million, respectively, in the liability for unrecognized tax benefits.

The Company recorded penalties and tax-related interest expense to the tax provision of $16.4 million, $10.3 million and $8.0 million for the years ended December 31, 2020, 2019 and 2018, respectively. In addition, due to the expiration of the statute of limitations in certain jurisdictions and certain positions that were effectively settled, the Company reduced its liability for penalties and income tax-related interest expense related to uncertain tax positions during the years ended December 31, 2020, 2019 and 2018 by $4.8 million, $2.7 million and $16.2 million, respectively.

As of December 31, 2020 and 2019, the total amount of accrued income tax-related interest and penalties included in the consolidated balance sheets were $34.4 million and $26.6 million, respectively.

The Company has filed for prior taxable years, and for its taxable year ended December 31, 2020 will file, numerous consolidated and separate income tax returns, including U.S. federal and state tax returns and foreign tax returns. The Company is subject to examination in the U.S. and various state and foreign jurisdictions for certain tax years. As a result of the Company’s ability to carryforward federal, state and foreign NOLs, the applicable tax years generally remain open to examination several years after the applicable loss carryforwards have been used or have expired. The Company regularly assesses the likelihood of additional assessments in each of the tax jurisdictions resulting from these examinations. The Company believes that adequate provisions have been made for income taxes for all periods through December 31, 2020.

## 14. STOCK-BASED COMPENSATION

Summary of Stock-Based Compensation Plans—The Company maintains equity incentive plans that provide for the grant of stock-based awards to its directors, officers and employees. The 2007 Equity Incentive Plan, as amended (the "2007 Plan"), provides for the grant of non-qualified and incentive stock options, as well as restricted stock units, restricted stock and other stock-based awards. Exercise prices for non-qualified and incentive stock options are not less than the fair value of the underlying common stock on the date of grant. Equity awards typically vest ratably, generally over four years for RSUs and stock options and three years for PSUs. Stock options generally expire 10 years from the date of grant. As of December 31, 2020, the Company had the ability to grant stock-based awards with respect to an aggregate of 6.5 million shares of common stock under the 2007 Plan. In addition, the Company maintains an employee stock purchase plan (the "ESPP") pursuant to which eligible employees may purchase shares of the Company's common stock on the last day of each bi-annual offering period at a 15% discount from the lower of the closing market value on the first or last day of such offering period. The offering periods run from June 1 through November 30 and from December 1 through May 31 of each year.

During the years ended December 31, 2020, 2019 and 2018, the Company recorded and capitalized the following stock-based compensation expenses:

<table><tr><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>Stock-based compensation expense - Property</td><td>$ 1.9</td><td>$ 1.8</td><td>$ 2.4</td></tr><tr><td>Stock-based compensation expense - Services</td><td>1.1</td><td>1.0</td><td>0.9</td></tr><tr><td>Stock-based compensation expense - SG&amp;A</td><td>117.8</td><td>108.6</td><td>134.2</td></tr><tr><td>Total stock-based compensation expense</td><td>$ 120.8</td><td>$ 111.4</td><td>$ 137.5</td></tr><tr><td>Stock-based compensation expense capitalized as property and equipment</td><td>$ 1.7</td><td>$ 1.6</td><td>$ 2.0</td></tr></table>

Stock Options—There were no options granted during the years ended December 31, 2020, 2019 and 2018. The fair values of previously granted stock options were estimated on the date of grant using the Black-Scholes option pricing model based on the assumptions at the date of grant.

The intrinsic value of stock options exercised during the years ended December 31, 2020, 2019 and 2018 was $176.3 million, $145.5 million and $98.8 million, respectively. As of December 31, 2020, total unrecognized compensation expense related to unvested stock options was less than $0.1 million and is expected to be recognized over a weighted average period of less than



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

one year. The amount of cash received from the exercise of stock options was $84.7 million during the year ended December 31, 2020.

The Company’s option activity for the year ended December 31, 2020 was as follows (share and per share data disclosed in full amounts):

<table><tr><td></td><td>Options</td><td>Weighted Average Exercise Price Per Share</td><td>Weighted Average Remaining Life (Years)</td><td>Aggregate Intrinsic Value</td></tr><tr><td>Outstanding as of January 1, 2020</td><td>3,060,242</td><td>85.90</td><td></td><td></td></tr><tr><td>Granted</td><td>—</td><td>—</td><td></td><td></td></tr><tr><td>Exercised</td><td>(1,043,981)</td><td>81.16</td><td></td><td></td></tr><tr><td>Forfeited</td><td>—</td><td>—</td><td></td><td></td></tr><tr><td>Expired</td><td>—</td><td>—</td><td></td><td></td></tr><tr><td>Outstanding as of December 31, 2020</td><td>2,016,261</td><td>88.36</td><td>3.15</td><td>27.44</td></tr><tr><td>Exercisable as of December 31, 2020</td><td>2,014,628</td><td>88.33</td><td>3.15</td><td>27.42</td></tr><tr><td>Vested or expected to vest as of December 31, 2020</td><td>2,016,261</td><td>88.36</td><td>3.15</td><td>27.44</td></tr></table>

The following table sets forth information regarding options outstanding at December 31, 2020 (share and per share data disclosed in full amounts):

<table><tr><td colspan="4">Options Outstanding</td><td colspan="4">Options Exercisable</td></tr><tr><td>Range of Exercise Price Per Share</td><td>Outstanding Number of Options</td><td>Weighted Average Exercise Price Per Share</td><td>Weighted Average Remaining Life (Years)</td><td>Options Exercisable</td><td>Weighted Average Exercise Price Per Share</td><td></td><td></td></tr><tr><td>$50.78 - $71.07</td><td>102,447</td><td>$ 61.55</td><td>1.14</td><td>102,447</td><td>$ 61.55</td><td></td><td></td></tr><tr><td>$76.90 - $77.75</td><td>221,435</td><td>76.92</td><td>1.82</td><td>221,435</td><td>76.92</td><td></td><td></td></tr><tr><td>$81.18 - $94.23</td><td>432,352</td><td>81.58</td><td>2.66</td><td>432,352</td><td>81.58</td><td></td><td></td></tr><tr><td>$94.57 - $94.71</td><td>1,240,897</td><td>94.61</td><td>3.69</td><td>1,240,897</td><td>94.61</td><td></td><td></td></tr><tr><td>$99.67 - $121.15</td><td>19,130</td><td>111.97</td><td>5.45</td><td>17,497</td><td>111.39</td><td></td><td></td></tr><tr><td>$50.78 - $121.15</td><td>2,016,261</td><td>88.36</td><td>3.15</td><td>2,014,628</td><td>88.33</td><td></td><td></td></tr></table>

Restricted Stock Units and Performance-Based Restricted Stock Units—The Company’s RSU and PSU activity for the year ended December 31, 2020 was as follows (share and per share data disclosed in full amounts):

<table><tr><td></td><td>RSUs</td><td>Weighted Average Grant Date Fair Value</td><td>PSUs</td><td>Weighted Average Grant Date Fair Value</td></tr><tr><td>Outstanding as of January 1, 2020 (1)</td><td>1,454,350</td><td>$ 147.67</td><td>528,908</td><td>$ 136.94</td></tr><tr><td>Granted (2)</td><td>456,369</td><td>243.25</td><td>151,341</td><td>216.36</td></tr><tr><td>Vested and Released (3)</td><td>(618,013)</td><td>134.53</td><td>(282,774)</td><td>113.58</td></tr><tr><td>Forfeited (4)</td><td>(47,631)</td><td>173.74</td><td>(76,965)</td><td>211.21</td></tr><tr><td>Outstanding as of December 31, 2020</td><td>1,245,075</td><td>$ 188.23</td><td>320,510</td><td>$ 177.22</td></tr><tr><td>Expected to vest as of December 31, 2020</td><td>1,245,075</td><td>$ 188.23</td><td>320,510</td><td>$ 177.22</td></tr><tr><td>Vested and deferred as of December 31, 2020 (5)</td><td>58,204</td><td>$ 181.26</td><td>—</td><td>—</td></tr></table>



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

(1) PSUs consist of the target number of shares issuable at the end of the three-year performance period for the 2019 PSUs and the 2018 PSUs (each as defined below), or 114,823 and 131,311 shares, respectively, and the shares issuable at the end of the three-year vesting period for the PSUs granted in 2017 (the "2017 PSUs"), based on achievement against the performance metrics for the three-year performance period, or 282,774 shares.

(2) PSUs consist of the target number of shares issuable at the end of the three-year performance period for the 2020 PSUs, or 110,925 shares, which includes 17,593 shares granted during the three months ended June 30, 2020 to the Company’s newly appointed Chief Executive Officer (“CEO”) and Chief Financial Officer and also includes 40,186 shares granted to the Company’s former CEO during the three months ended March 31, 2020 which were subsequently forfeited upon his retirement. PSUs also includes the shares above target that are issuable for the 2018 PSUs at the end of the three-year performance cycle based on exceeding the performance metric for the three-year performance period, or 40,416 shares.

(3) This includes 19,810 of previously vested and deferred RSUs. PSUs consist of shares vested pursuant to the 2017 PSUs. There are no additional shares to be earned related to the 2017 PSUs.

(4) PSUs consist of shares forfeited in connection with the retirement of the Company’s former CEO, which includes the target number of shares issuable at the end of the three-year performance period for the 2020 PSUs and the pro-rated target numbers of shares issuable at the end of the three-year performance periods for the 2019 PSUs and the 2018 PSUs as calculated pursuant to the award agreements related to the 2019 PSUs and the 2018 PSUs.

(5) Vested and deferred RSUs are related to deferred compensation for certain former employees.

The total fair value of RSUs and PSUs that vested during the year ended December 31, 2020 was $214.1 million.

Restricted Stock Units—As of December 31, 2020, total unrecognized compensation expense related to unvested RSUs granted under the 2007 Plan was $125.7 million and is expected to be recognized over a weighted average period of approximately two years. Vesting of RSUs is subject generally to the employee’s continued employment or death, disability or qualified retirement (each as defined in the applicable RSU award agreement).

Performance-Based Restricted Stock Units—During the years ended December 31, 2020, 2019 and 2018, the Company’s Compensation Committee granted an aggregate of 110,925 PSUs (the “2020 PSUs”), 114,823 PSUs (the “2019 PSUs”) and 131,311 PSUs (the “2018 PSUs”), respectively, to its executive officers and established the performance metrics for these awards. Threshold, target and maximum parameters were established for the metrics for a three-year performance period with respect to each of the 2020 PSUs, the 2019 PSUs and the 2018 PSUs and will be used to calculate the number of shares that will be issuable when each award vests, which may range from zero to 200% of the target amounts. At the end of each three-year performance period, the number of shares that vest will depend on the degree of achievement against the pre-established performance goals. PSUs will be paid out in common stock at the end of each performance period, subject generally to the executive’s continued employment or death, disability or qualified retirement (each as defined in the applicable PSU award agreement). PSUs will accrue dividend equivalents prior to vesting, which will be paid out only in respect of shares that actually vest.

During the year ended December 31, 2020, the Company recorded $20.9 million in stock-based compensation expense for equity awards in which the performance goals have been established and were probable of being achieved. The remaining unrecognized compensation expense related to these awards at December 31, 2020 was $4.3 million based on the Company’s current assessment of the probability of achieving the performance goals. The weighted-average period over which the cost will be recognized is approximately two years.

## 15. REDEEMABLE NONCONTROLLING INTERESTS

India Redeemable Noncontrolling Interests—On April 21, 2016, the Company, through its wholly owned subsidiary, ATC Asia Pacific Pte. Ltd., acquired a 51% controlling ownership interest in ATC TIPL (formerly Vion), a telecommunications infrastructure company that owns and operates wireless communications towers and indoor DAS networks in India (the “Vion Acquisition”), which was subsequently merged with the Company’s existing India property operations.

In connection with the Vion Acquisition, the Company, through one of its subsidiaries, entered into a shareholders agreement (the “Shareholders Agreement”) with Vion and the following remaining Vion shareholders: Tata Sons Limited (“Tata Sons”), Tata Teleservices, IDFC Private Equity Fund III (“IDFC”), Macquarie SBI Infrastructure Investments Pte Limited and SBI Macquarie Infrastructure Trust (together, “Macquarie,” and, collectively with Tata Sons, Tata Teleservices and IDFC, the “Remaining Shareholders”).

The Shareholders Agreement also provides the Remaining Shareholders with put options, which allow them to sell outstanding shares of ATC TIPL to the Company, and the Company with call options, which allow it to buy the noncontrolling shares of ATC TIPL. The put options, which are not under the Company’s control, cannot be separated from the noncontrolling interests. As a result, the combination of the noncontrolling interests and the redemption feature requires classification as redeemable noncontrolling interests in the consolidated balance sheet, separate from equity.

The noncontrolling interests become redeemable after the passage of time, and therefore, the Company records the carrying amount of the noncontrolling interests outside of permanent equity at the greater of (i) the initial carrying amount, increased or decreased for the noncontrolling interests' share of net income or loss and foreign currency translation adjustments, or (ii) the



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

estimated redemption value. If required, the Company will adjust the redeemable noncontrolling interests to the estimated redemption value on each balance sheet date with changes in the estimated redemption value recognized as an adjustment to Net income attributable to noncontrolling interests. The Company adjusts the estimated redemption value of the noncontrolling interests based on the operating results of ATC TIPL and previously recorded adjustments to the estimated redemption value.

The put options may be exercised, requiring the Company to purchase the Remaining Shareholders' equity interests, on specified dates through March 31, 2021.

During the year ended December 31, 2019, the Company redeemed 50% of Tata Teleservices and Tata Sons' combined holdings of ATC TIPL and 100% of IDFC's holdings of ATC TIPL, for total consideration of INR 29.4 billion ($425.7 million at the date of redemption). As a result of the redemption, the Company's controlling interest in ATC TIPL increased from 63% to 79% and the noncontrolling interest decreased from 37% to 21%.

During the year ended December 31, 2020, the Company redeemed 100% of Tata Teleservices and Tata Sons' remaining combined holdings of ATC TIPL, for total consideration of INR 24.8 billion ($337.3 million at the date of redemption). As a result of the redemption, the Company's controlling interest in ATC TIPL increased from 79% to 92% and the noncontrolling interest decreased from 21% to 8%.

In February 2021, the Company entered into an agreement with Macquarie to redeem 100% of their combined holdings in ATC TIPL at price of INR 175 per share, subject to certain adjustments. Accordingly, the Company expects to pay an amount equivalent to INR 12.9 billion (approximately $176.6 million) to redeem the shares in 2021, subject to regulatory approval. After the completion of the redemption, the Company will hold a 100% ownership interest in ATC TIPL.

Other Redeemable Noncontrolling Interests—During the year ended December 31, 2020, the Company completed the acquisition of MTN’s noncontrolling interests in each of the Company’s joint ventures in Ghana and Uganda for total consideration of approximately $524.4 million, including a net adjustment of $1.4 million made during the three months ended March 31, 2020, which resulted in an increase in the Company’s controlling interests in such joint ventures from 51% to 100%. During the year ended December 31, 2019, the Company, through a subsidiary of ATC Europe, entered into an agreement with its local partners in France to form Eure-et-Loir Réseaux Mobiles SAS (“Eure-et-Loir”), a telecommunications infrastructure company that owns and operates wireless communications towers in France. The Company’s controlling interest in Eure-et-Loir is 51% with local partners holding a 49% noncontrolling interest. The value of the Eure-et-Loir interests as of December 31, 2020 was $2.6 million.

The changes in Redeemable noncontrolling interests for the years ended December 31, 2020, 2019 and 2018 were as follows:

<table><tr><td rowspan="2"></td><td colspan="4">Year Ended December 31,</td></tr><tr><td>2020</td><td>2019</td><td>2018</td><td></td></tr><tr><td>Balance as of January 1,</td><td>$ 1,096.5</td><td>$ 1,004.8</td><td>$ 1,126.2</td><td></td></tr><tr><td>Additions to redeemable noncontrolling interests</td><td>—</td><td>525.7</td><td>—</td><td></td></tr><tr><td>Net income (loss) attributable to noncontrolling interests</td><td>6.6</td><td>35.8</td><td>(87.9)</td><td></td></tr><tr><td>Adjustment to noncontrolling interest redemption value</td><td>(14.0)</td><td>(35.8)</td><td>86.7</td><td></td></tr><tr><td>Adjustment to noncontrolling interest due to merger</td><td>—</td><td>—</td><td>(28.1)</td><td></td></tr><tr><td>Purchase of redeemable noncontrolling interest</td><td>(861.7)</td><td>(425.7)</td><td>—</td><td></td></tr><tr><td>Foreign currency translation adjustment attributable to noncontrolling interests</td><td>(15.3)</td><td>(8.3)</td><td>(92.1)</td><td></td></tr><tr><td>Balance as of December 31,</td><td>$ 212.1</td><td>$ 1,096.5</td><td>$ 1,004.8</td><td></td></tr></table>

## 16. EQUITY

Dividends—The Company may pay dividends in cash or, subject to certain limitations, in shares of common stock or any combination of cash and shares of common stock.

Sales of Equity Securities—The Company receives proceeds from sales of its equity securities pursuant to the ESPP and upon exercise of stock options granted under the 2007 Plan. During the year ended December 31, 2020, the Company received an aggregate of $98.1 million in proceeds upon exercises of stock options and sales pursuant to the ESPP.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

2020 “At the Market” Stock Offering Program—In August 2020, the Company established an “at the market” stock offering program through which it may issue and sell shares of its common stock having an aggregate gross sales price of up to $1.0 billion (the “2020 ATM Program”). Sales under the 2020 ATM Program may be made by means of ordinary brokers’ transactions on the New York Stock Exchange or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or, subject to specific instructions of the Company, at negotiated prices. The Company intends to use the net proceeds from any issuances under the 2020 ATM Program for general corporate purposes, which may include, among other things, the funding of acquisitions, additions to working capital and repayment or refinancing of existing indebtedness. As of December 31, 2020, the Company has not sold any shares of common stock under the 2020 ATM Program.

Stock Repurchase Programs—In March 2011, the Company’s Board of Directors approved a stock repurchase program, pursuant to which the Company is authorized to repurchase up to $1.5 billion of its common stock (the “2011 Buyback”). In December 2017, the Board of Directors approved an additional stock repurchase program, pursuant to which the Company is authorized to repurchase up to $2.0 billion of its common stock (the “2017 Buyback,” and, together with the 2011 Buyback, the “Buyback Programs”).

During the year ended December 31, 2020, the Company repurchased 264,086 shares of its common stock under the 2011 Buyback for an aggregate of $56.0 million, including commissions and fees. As of December 31, 2020, the Company had repurchased a total of 14,361,283 shares of its common stock under the 2011 Buyback for an aggregate of $1.5 billion, including commissions and fees. There were no repurchases under the 2017 Buyback.

Under the Buyback Programs, the Company is authorized to purchase shares from time to time through open market purchases or in privately negotiated transactions not to exceed market prices and subject to market conditions and other factors. With respect to open market purchases, the Company may use plans adopted in accordance with Rule 10b5-1 under the Exchange Act in accordance with securities laws and other legal requirements, which allows the Company to repurchase shares during periods when it may otherwise be prevented from doing so under insider trading laws or because of self-imposed trading blackout periods.

The Company expects to fund any further repurchases of its common stock through a combination of cash on hand, cash generated by operations and borrowings under its credit facilities. Repurchases under the Buyback Programs are subject to, among other things, the Company having available cash to fund the repurchases.

Distributions—During the years ended December 31, 2020, 2019 and 2018, the Company declared the following cash distributions (per share data reflects actual amounts):

For the year ended December 31,

<table><tr><td rowspan="2"></td><td colspan="2">2020</td><td colspan="2">2019</td><td colspan="2">2018</td></tr><tr><td>Distribution per share</td><td>Aggregate Payment Amount</td><td>Distribution per share</td><td>Aggregate Payment Amount</td><td>Distribution per share</td><td>Aggregate Paymnt Amount</td></tr><tr><td>Common Stock</td><td>$ 4.53</td><td>$ 2,010.7</td><td>$ 3.78</td><td>$ 1,672.8</td><td>$ 3.15</td><td>$ 1,389.8</td></tr><tr><td>Series B Preferred Stock (1)</td><td>$ —</td><td>$ —</td><td>$ —</td><td>$ —</td><td>$ 13.75</td><td>$ 18.9</td></tr></table>

(1) 5.50% Mandatory Convertible Preferred Stock, Series B, par value $0.01 per share (the “Series B Preferred Stock”), which converted into shares of the Company’s common stock pursuant to the provisions of the Certificate of Designations governing the Series B Preferred Stock in 2018.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

The following table characterizes the tax treatment of distributions declared per share of common stock and Mandatory Convertible Preferred Stock.

<table><tr><td rowspan="3"></td><td colspan="7">For the year ended December 31,</td></tr><tr><td colspan="3">2020</td><td colspan="2">2019</td><td colspan="2">2018</td></tr><tr><td>Per Share</td><td>%</td><td>Per Share</td><td>%</td><td>Per Share</td><td>%</td><td></td></tr><tr><td>Common Stock</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Ordinary dividend</td><td>$ 3.3200</td><td>(1)</td><td>100.00</td><td>$ 3.7800</td><td>100.00 %</td><td>$ 3.1500</td><td>100.00 %</td></tr><tr><td>Capital gains distribution</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Total</td><td>$ 3.3200</td><td>100.00 %</td><td>$ 3.7800</td><td>100.00 %</td><td>$ 3.1500</td><td>100.00 %</td><td></td></tr><tr><td>Series B Preferred Stock (2)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Ordinary dividend</td><td>$ —</td><td>—</td><td>$ —</td><td>—</td><td>— %</td><td>$ 2.1314</td><td>(3) 100.00 %</td></tr><tr><td>Capital gains distribution</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Total</td><td>$ —</td><td>—</td><td>$ —</td><td>—</td><td>— %</td><td>$ 2.1314</td><td>100.00 %</td></tr></table>

(1) Excludes dividend declared on December 3, 2020 of $1.21 per share, which was paid on February 2, 2021 to common stockholders of record at the close of business on December 28, 2020 and which will apply to the 2021 tax year.

(2) Represents the tax treatment on dividends per depositary share, each of which represents a 1/10th interest in a share of Series B Preferred Stock.

(3) Includes a deemed distribution as a result of a conversion rate adjustment triggered on January 18, 2018.

The Company accrues distributions on unvested restricted stock units, which are payable upon vesting. The amount accrued for distributions payable related to unvested restricted stock units was $12.6 million and $14.3 million as of December 31, 2020 and 2019, respectively. During the year ended December 31, 2020, the Company paid $7.8 million of distributions upon the vesting of restricted stock units. To maintain its qualification for taxation as a REIT, the Company expects to continue paying distributions, the amount, timing and frequency of which will be determined, and subject to adjustment, by the Company’s Board of Directors.

Dividend to noncontrolling interest— The Company’s joint ventures may, from time to time, declare dividends. During the year ended December 31, 2020, ATC Europe declared a dividend of EUR 13.2 million (approximately $16.2 million) payable in cash to the Company and PGGM in proportion to their respective equity interests in the joint venture on or before June 30, 2021 and is accrued for as of December 31, 2020.

## 17. OTHER OPERATING EXPENSE

Other operating expense consists primarily of impairment charges, net losses on sales or disposals of assets and other operating expense items. The Company records impairment charges to write down certain assets to their net realizable value after an indicator of impairment is identified and subsequent analysis determines that the asset is either partially recoverable or not recoverable. These assets consisted primarily of towers and related assets, which are typically assessed on an individual basis, network location intangibles, which relate directly to towers, tenant-related intangibles, which are assessed on a tenant basis, and right-of-use assets. Net losses on sales or disposals of assets primarily relate to certain non-core towers, other assets and miscellaneous items. Other operating expenses includes acquisition-related costs and integration costs.

Other operating expenses included the following for the years ended December 31,:

<table><tr><td></td><td colspan="2">2020 (1)</td><td colspan="2">2019 (2)</td><td colspan="2">2018</td></tr><tr><td>Impairment charges</td><td>$</td><td>222.8</td><td>$</td><td>94.2</td><td>$</td><td>394.0</td></tr><tr><td>Net losses on sales or disposals of assets</td><td></td><td>17.3</td><td></td><td>45.1</td><td></td><td>85.6</td></tr><tr><td>Other operating expenses</td><td></td><td>25.7</td><td></td><td>27.0</td><td></td><td>33.7</td></tr><tr><td>Total Other operating expenses</td><td>$</td><td>265.8</td><td>$</td><td>166.3</td><td>$</td><td>513.3</td></tr></table>

(1) For the year ended December 31, 2020, Other operating expenses includes an $11.9 million benefit in Brazil.

(2) For the year ended December 31, 2019, Other operating expenses includes $13.1 million of refunds related to pre-acquisition contingencies and settlements.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

Impairment charges included the following for the years ended December 31.:

<table><tr><td></td><td>2020</td><td>2019</td><td>2018 (1)</td></tr><tr><td>Tower and network location intangible assets</td><td>$ 142.4</td><td>$ 77.4</td><td>$ 284.9</td></tr><tr><td>Tenant relationships</td><td>—</td><td>—</td><td>107.3</td></tr><tr><td>Right-of-use assets</td><td>76.1</td><td>9.9</td><td>—</td></tr><tr><td>Other</td><td>4.3</td><td>6.9</td><td>1.8</td></tr><tr><td>Total impairment charges</td><td>$ 222.8</td><td>$ 94.2</td><td>$ 394.0</td></tr></table>

(1) For the year ended December 31, 2018, impairment charges on tower and network location intangible assets included $258.3 million in India primarily related to carrier consolidation-driven churn events. In addition, the Company fully impaired the tenant relationship for Aircel Ltd., which resulted in an impairment charge of $107.3 million.

## 18. EARNINGS PER COMMON SHARE

The following table sets forth basic and diluted net income per common share computational data for the years ended December 31, (shares in thousands, except per share data):

<table><tr><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>Net income attributable to American Tower Corporation stockholders</td><td>$ 1,690.6</td><td>$ 1,887.8</td><td>$ 1,236.4</td></tr><tr><td>Dividends on preferred stock</td><td>—</td><td>—</td><td>(9.4)</td></tr><tr><td>Net income attributable to American Tower Corporation common stockholders</td><td>$ 1,690.6</td><td>$ 1,887.8</td><td>$ 1,227.0</td></tr><tr><td>Basic weighted average common shares outstanding</td><td>443,640</td><td>442,319</td><td>439,606</td></tr><tr><td>Dilutive securities</td><td>2,464</td><td>3,201</td><td>3,354</td></tr><tr><td>Diluted weighted average common shares outstanding</td><td>446,104</td><td>445,520</td><td>442,960</td></tr><tr><td>Basic net income attributable to American Tower Corporation common stockholders per common share</td><td>$ 3.81</td><td>$ 4.27</td><td>$ 2.79</td></tr><tr><td>Diluted net income attributable to American Tower Corporation common stockholders per common share</td><td>$ 3.79</td><td>$ 4.24</td><td>$ 2.77</td></tr></table>

## Shares Excluded From Dilutive Effect

The following shares were not included in the computation of diluted earnings per share because the effect would be anti-dilutive for the years ended December 31, (in thousands, on a weighted average basis):

<table><tr><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>Restricted stock awards</td><td>1</td><td>2</td><td>—</td></tr><tr><td>Preferred stock (1)</td><td>—</td><td>—</td><td>1,456</td></tr></table>

(1) For the years ended December 31, 2020 and 2019, the Company had no preferred stock outstanding.

## 19. COMMITMENTS AND CONTINGENCIES

Litigation—The Company periodically becomes involved in various claims, lawsuits and proceedings that are incidental to its business. In the opinion of Company management, after consultation with counsel, there are no matters currently pending that would, in the event of an adverse outcome, materially impact the Company’s consolidated financial position, results of operations or liquidity.

Verizon Transaction—In March 2015, the Company entered into an agreement with various operating entities of Verizon Communications Inc. (“Verizon”) that currently provides for the lease, sublease or management of approximately 11,250 wireless communications sites commencing March 27, 2015. The average term of the lease or sublease for all sites at the inception of the agreement was approximately 28 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the leased sites in tranches, subject to the applicable lease, sublease or management rights upon its scheduled expiration. Each tower is assigned to an annual tranche, ranging from 2034 to 2047, which represents the outside expiration date for the sublease rights to the towers in that tranche. The purchase price for each tranche is a fixed amount stated in the lease for such tranche plus the fair market value of certain alterations made to the related



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

towers. The aggregate purchase option price for the towers leased and subleased is approximately $5.0 billion. Verizon will occupy the sites as a tenant for an initial term of ten years with eight optional successive five-year terms; each such term shall be governed by standard master lease agreement terms established as a part of the transaction.

AT&T Transaction—The Company has an agreement with SBC Communications Inc., a predecessor entity to AT&T Inc. ("AT&T"), that currently provides for the lease or sublease of approximately 2,100 towers commencing between December 2000 and August 2004. Substantially all of the towers are part of the Trust Securitizations. The average term of the lease or sublease for all sites at the inception of the agreement was approximately 27 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the sites subject to the applicable lease or sublease upon its expiration. Each tower is assigned to an annual tranche, ranging from 2013 to 2032, which represents the outside expiration date for the sublease rights to that tower. The purchase price for each site is a fixed amount stated in the lease for that site plus the fair market value of certain alterations made to the related tower by AT&T. As of December 31, 2020, the Company has purchased an aggregate of 331 of the subleased towers which are subject to the applicable agreement, including 103 towers purchased during the year ended December 31, 2020 for an aggregate purchase price of $55.7 million. The aggregate purchase option price for the remaining towers leased and subleased is $973.4 million and includes per annum accretion through the applicable expiration of the lease or sublease of a site. For all such sites, AT&T has the right to continue to lease the reserved space through June 30, 2025 at the then-current monthly fee, which shall escalate in accordance with the standard master lease agreement for the remainder of AT&T's tenancy. Thereafter, AT&T shall have the right to renew such lease for up to five successive five-year terms.

Other Contingencies—The Company is subject to income tax and other taxes in the geographic areas where it holds assets or operates, and periodically receives notifications of audits, assessments or other actions by taxing authorities. Taxing authorities may issue notices or assessments while audits are being conducted. In certain jurisdictions, taxing authorities may issue assessments with minimal examination. These notices and assessments do not represent amounts that the Company is obligated to pay and are often not reflective of the actual tax liability for which the Company will ultimately be liable. In the process of responding to assessments of taxes that the Company believes are not enforceable, the Company avails itself of both administrative and judicial remedies. The Company evaluates the circumstances of each notification or assessment based on the information available and, in those instances in which the Company does not anticipate a successful defense of positions taken in its tax filings, a liability is recorded in the appropriate amount based on the underlying assessment.

On December 5, 2016, the Company received an income tax assessment of Essar Telecom Infrastructure Private Limited ("ETIPL") from the India Income Tax Department (the "Tax Department") for the fiscal year ending 2008 in the amount of INR 4.75 billion ($69.8 million on the date of assessment) related to capital contributions. The Company challenged the assessment before the Office of Commissioner of Income Tax - Appeals, which ruled in the Company's favor in January 2018. However, the Tax Department has appealed this ruling at a higher appellate authority. The Company estimates that there is a more likely than not probability that the Company's position will be sustained upon appeal. Accordingly, no liability has been recorded. Additionally, the assessment was made with respect to transactions that took place in the tax year commencing in 2007, prior to the Company's acquisition of ETIPL. Under the Company's definitive acquisition agreement with ETIPL, the seller is obligated to indemnify and defend the Company with respect to any tax-related liability that may arise from activities prior to March 31, 2010.

Guaranties and Indemnifications—The Company enters into agreements from time to time in the ordinary course of business pursuant to which it agrees to guarantee or indemnify third parties for certain claims. The Company has also entered into purchase and sale agreements relating to the sale or acquisition of assets containing customary indemnification provisions. The Company’s indemnification obligations under these agreements generally are limited solely to damages resulting from breaches of representations and warranties or covenants under the applicable agreements. In addition, payments under such indemnification clauses are generally conditioned on the other party making a claim that is subject to whatever defenses the Company may have and are governed by dispute resolution procedures specified in the particular agreement. Further, the Company’s obligations under these agreements may be limited in duration and amount, and in some instances, the Company may have recourse against third parties for payments made by the Company. The Company has not historically made any material payments under these agreements and, as of December 31, 2020, is not aware of any agreements that could result in a material payment. If the Company is unable to close the Pending Telxius Acquisition, as defined in note 23, the Company would be liable under the terms of the agreements to make certain payments to Telxius, which could be material.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

## 20. SUPPLEMENTAL CASH FLOW INFORMATION

Supplemental cash flow information and non-cash investing and financing activities are as follows for the years ended December 31,:

<table><tr><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>Supplemental cash flow information:</td><td></td><td></td><td></td></tr><tr><td>Cash paid for interest</td><td>$ 762.3</td><td>$ 750.2</td><td>$ 789.7</td></tr><tr><td>Cash paid for income taxes (net of refunds of $27.0, $11.2 and $25.0, respectively)</td><td>146.3</td><td>147.5</td><td>163.9</td></tr><tr><td>Non-cash investing and financing activities:</td><td></td><td></td><td></td></tr><tr><td>Increase (decrease) in accounts payable and accrued expenses for purchases of property and equipment and construction activities</td><td>45.8</td><td>(21.0)</td><td>8.3</td></tr><tr><td>Purchases of property and equipment under finance leases, perpetual easements and capital leases</td><td>75.0</td><td>81.3</td><td>57.8</td></tr><tr><td>Fair value of debt assumed through acquisitions (1)</td><td>800.0</td><td>329.8</td><td>—</td></tr><tr><td>Acquisition of Commercialization Rights (2)</td><td>—</td><td>—</td><td>24.8</td></tr><tr><td>Debt financed acquisition of communication sites</td><td>—</td><td>—</td><td>54.2</td></tr><tr><td>Settlement of third-party debt</td><td>(5.0)</td><td>—</td><td>—</td></tr></table>

(1) For the year ended December 31, 2020, consists of the InSite Debt.

(2) Related to the note extinguishment with TV Azteca, S.A. de C.V. in 2018.

## 21. BUSINESS SEGMENTS

The Company’s primary business is leasing space on multitenant communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. This business is referred to as the Company’s property operations.

During the fourth quarter of 2020, as a result of the InSite Acquisition, the Company updated the names of its reportable segments to rename U.S. property and Asia property to U.S. & Canada property and Asia-Pacific property, respectively. The Company continues to report its results in six segments – U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property and services. This change was made to better align the names of the Company’s reportable segments with the geographical areas of the Company’s business operations following the InSite Acquisition. The change in the names the Company’s reportable segments is solely reflective of the inclusion of Canada and Australia in its business operations, as a result of the InSite Acquisition. The change in reportable segments had no impact on the Company’s consolidated financial statements for any prior periods. Historical financial information included in this Annual Report on Form 10-K has not been adjusted.

As of December 31, 2020, the Company’s property operations consisted of the following:

• U.S. & Canada: property operations in Canada and the United States;

• Asia-Pacific: property operations in Australia and India;

• Africa: property operations in Burkina Faso, Ghana, Kenya, Niger, Nigeria, South Africa and Uganda;

• Europe: property operations in France, Germany and Poland; and

• Latin America: property operations in Argentina, Brazil, Chile, Colombia, Costa Rica, Mexico, Paraguay and Peru.

The Company’s services segment offers tower-related services in the United States, including AZP and structural analysis, which primarily support its site leasing business, including the addition of new tenants and equipment on its sites. The services segment is a strategic business unit that offers different services from, and requires different resources, skill sets and marketing strategies than, the property operating segments.

The accounting policies applied in compiling segment information below are similar to those described in note 1. Among other factors, in evaluating financial performance in each business segment, management uses segment gross margin and segment operating profit. The Company defines segment gross margin as segment revenue less segment operating expenses excluding stock-based compensation expense recorded in costs of operations; Depreciation, amortization and accretion; Selling, general, administrative and development expense; and Other operating expenses. The Company defines segment operating profit as segment gross margin less Selling, general, administrative and development expense attributable to the segment, excluding stock-based compensation expense and corporate expenses. For reporting purposes, for periods through September 30, 2018,



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

the Latin America property segment gross margin and segment operating profit also included Interest income (expense), TV Azteca, net. These measures of segment gross margin and segment operating profit are also before Interest income, Interest expense, Gain (loss) on retirement of long-term obligations, Other income (expense), Net income (loss) attributable to noncontrolling interests and Income tax benefit (provision). The categories of expenses indicated above, such as depreciation, have been excluded from segment operating performance as they are not considered in the review of information or the evaluation of results by management. There are no significant revenues resulting from transactions between the Company’s operating segments. All intercompany transactions are eliminated to reconcile segment results and assets to the consolidated statements of operations and consolidated balance sheets.

Summarized financial information concerning the Company’s reportable segments for the years ended December 31, 2020, 2019 and 2018 is shown in the following tables. The “Other” column (i) represents amounts excluded from specific segments, such as business development operations, stock-based compensation expense and corporate expenses included in Selling, general, administrative and development expense; Other operating expenses; Interest income; Interest expense; Gain (loss) on retirement of long-term obligations; and Other income (expense), and (ii) reconciles segment operating profit to Income from continuing operations before income taxes.

<table><tr><td rowspan="2">Year ended December 31, 2020</td><td colspan="10">Property</td></tr><tr><td>U.S. &amp; Canada</td><td>Asia-Pacific</td><td>Africa</td><td>Europe</td><td>Latin America</td><td>Total Property</td><td>Services</td><td>Other</td><td>Total</td><td></td></tr><tr><td>Segment revenues</td><td>$4,517.0</td><td>$1,139.4</td><td>$ 890.2</td><td>$ 149.6</td><td>$1,257.4</td><td>$ 7,953.6</td><td>$ 87.9</td><td></td><td>$ 8,041.5</td><td></td></tr><tr><td>Segment operating expenses (1)</td><td>808.0</td><td>661.4</td><td>297.7</td><td>28.1</td><td>392.5</td><td>2,187.7</td><td>36.5</td><td></td><td>2,224.2</td><td></td></tr><tr><td>Segment gross margin</td><td>3,709.0</td><td>478.0</td><td>592.5</td><td>121.5</td><td>864.9</td><td>5,765.9</td><td>51.4</td><td></td><td>5,817.3</td><td></td></tr><tr><td>Segment selling, general, administrative and development expense (1)</td><td>162.2</td><td>97.4</td><td>94.4</td><td>23.0</td><td>93.1</td><td>470.1</td><td>14.8</td><td></td><td>484.9</td><td></td></tr><tr><td>Segment operating profit</td><td>$3,546.8</td><td>$ 380.6</td><td>$ 498.1</td><td>$ 98.5</td><td>$ 771.8</td><td>$ 5,295.8</td><td>$ 36.6</td><td></td><td>$ 5,332.4</td><td></td></tr><tr><td>Stock-based compensation expense</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>$ 120.8</td><td>120.8</td><td></td></tr><tr><td>Other selling, general, administrative and development expense</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>176.0</td><td>176.0</td><td></td></tr><tr><td>Depreciation, amortization and accretion</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1,882.3</td><td>1,882.3</td><td></td></tr><tr><td>Other expense (2)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1,332.2</td><td>1,332.2</td><td></td></tr><tr><td>Income from continuing operations before income taxes</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>$1,821.1</td></tr><tr><td>Capital expenditures (3) (4)</td><td>$ 360.6</td><td>$ 112.9</td><td>$ 334.9</td><td>$ 31.6</td><td>$ 221.1</td><td>$ 1,061.1</td><td>$ —</td><td>$ 10.1</td><td>$ 1,071.2</td><td></td></tr></table>

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $3.0 million and $117.8 million, respectively.

(2) Primarily includes interest expense, losses from foreign currency exchange rate fluctuations and $222.8 million in impairment charges.

(3) Includes $9.2 million of finance lease payments included in Repayments of notes payable, credit facilities, term loans, senior notes, secured debt and finance leases in the cash flows from financing activities in the Company’s consolidated statements of cash flows.

(4) Includes $36.9 million of perpetual land easement payments reported in Deferred financing costs and other financing activities in the cash flows from financing activities in the Company’s consolidated statements of cash flows.



## AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

<table><tr><td rowspan="2">Year ended December 31, 2019</td><td colspan="9">Property</td><td rowspan="2">Other</td><td rowspan="2">Total</td></tr><tr><td>U.S. &amp; Canada</td><td>Asia-Pacific</td><td>Africa</td><td>Europe</td><td>Latin America</td><td>Total Property</td><td>Services</td><td></td></tr><tr><td>Segment revenues</td><td>$4,188.7</td><td>$1,217.0</td><td>$ 583.9</td><td>$ 134.6</td><td>$1,340.7</td><td>$ 7,464.9</td><td>$ 115.4</td><td></td><td></td><td>$ 7,580.3</td><td></td></tr><tr><td>Segment operating expenses (1)</td><td>807.9</td><td>715.9</td><td>209.0</td><td>27.8</td><td>411.3</td><td>2,171.9</td><td>42.1</td><td></td><td></td><td>2,214.0</td><td></td></tr><tr><td>Segment gross margin</td><td>3,380.8</td><td>501.1</td><td>374.9</td><td>106.8</td><td>929.4</td><td>5,293.0</td><td>73.3</td><td></td><td></td><td>5,366.3</td><td></td></tr><tr><td>Segment selling, general, administrative and development expense (1)</td><td>175.5</td><td>99.9</td><td>53.7</td><td>23.2</td><td>101.0</td><td>453.3</td><td>12.0</td><td></td><td></td><td>465.3</td><td></td></tr><tr><td>Segment operating profit</td><td>$3,205.3</td><td>$ 401.2</td><td>$ 321.2</td><td>$ 83.6</td><td>$ 828.4</td><td>$ 4,839.7</td><td>$ 61.3</td><td></td><td></td><td>$ 4,901.0</td><td></td></tr><tr><td>Stock-based compensation expense</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>$ 111.4</td><td></td><td>111.4</td><td></td></tr><tr><td>Other selling, general, administrative and development expense</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>156.5</td><td>156.5</td></tr><tr><td>Depreciation, amortization and accretion</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1,778.4</td><td>1,778.4</td></tr><tr><td>Other expense (2)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>938.3</td><td>938.3</td></tr><tr><td>Income from continuing operations before income taxes</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>$1,916.4</td></tr><tr><td>Capital expenditures (3) (4)</td><td>$ 359.5</td><td>$ 134.5</td><td>$ 258.5</td><td>$ 13.2</td><td>$ 260.4</td><td>$ 1,026.1</td><td>$</td><td>—</td><td>$ 12.8</td><td>$ 1,038.9</td><td></td></tr></table>

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $2.8 million and $108.6 million, respectively.

(2) Primarily includes interest expense.

(3) Includes $18.0 million of finance lease payments included in Repayments of notes payable, credit facilities, term loan, senior notes, secured debt and finance leases in the cash flows from financing activities in the Company’s consolidated statements of cash flows.

(4) Includes $29.6 million of perpetual land easement payments reported in Deferred financing costs and other financing activities in the cash flows from financing activities in the Company’s consolidated statements of cash flows.

<table><tr><td rowspan="2">Year ended December 31, 2018</td><td colspan="9">Property</td><td rowspan="2">Other</td><td rowspan="2">Total</td></tr><tr><td>U.S. &amp; Canada</td><td>Asia-Pacific</td><td>Africa</td><td>Europe</td><td>Latin America</td><td>Total Property</td><td>Services</td><td></td></tr><tr><td>Segment revenues (1)</td><td>$3,822.1</td><td>$1,540.5</td><td>$ 545.5</td><td>$ 141.8</td><td>$1,264.8</td><td>$ 7,314.7</td><td>$ 125.4</td><td></td><td></td><td>$ 7,440.1</td><td></td></tr><tr><td>Segment operating expenses (2)</td><td>771.0</td><td>710.9</td><td>208.0</td><td>30.1</td><td>406.3</td><td>2,126.3</td><td>48.2</td><td></td><td></td><td>2,174.5</td><td></td></tr><tr><td>Interest income, TV Azteca, net</td><td>—</td><td>—</td><td>—</td><td>—</td><td>(0.1)</td><td>(0.1)</td><td>—</td><td></td><td></td><td>(0.1)</td><td></td></tr><tr><td>Segment gross margin</td><td>3,051.1</td><td>829.6</td><td>337.5</td><td>111.7</td><td>858.4</td><td>5,188.3</td><td>77.2</td><td></td><td></td><td>5,265.5</td><td></td></tr><tr><td>Segment selling, general, administrative and development expense (2)</td><td>165.2</td><td>110.7</td><td>48.0</td><td>21.1</td><td>83.5</td><td>428.5</td><td>14.4</td><td></td><td></td><td>442.9</td><td></td></tr><tr><td>Segment operating profit</td><td>$2,885.9</td><td>$ 718.9</td><td>$ 289.5</td><td>$ 90.6</td><td>$ 774.9</td><td>$ 4,759.8</td><td>$ 62.8</td><td></td><td></td><td>$ 4,822.6</td><td></td></tr><tr><td>Stock-based compensation expense</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>$ 137.5</td><td></td><td>137.5</td><td></td></tr><tr><td>Other selling, general, administrative and development expense</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>156.1</td><td></td><td>156.1</td><td></td></tr><tr><td>Depreciation, amortization and accretion</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>2,110.8</td><td></td><td>2,110.8</td><td></td></tr><tr><td>Other expense (3)</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1,263.6</td><td></td><td>1,263.6</td><td></td></tr><tr><td>Income from continuing operations before income taxes</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>$ 1,154.6</td><td></td></tr><tr><td>Capital expenditures (4)</td><td>$ 376.9</td><td>$ 101.0</td><td>$ 212.5</td><td>$ 20.2</td><td>$ 220.7</td><td>$ 931.3</td><td>$</td><td>—</td><td>$ 13.9</td><td>$ 945.2</td><td></td></tr></table>

(1) Asia-Pacific segment revenues include a net impact of $333.7 million as a result of the settlement payment received from Tata in the fourth quarter of 2018.

(2) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $3.3 million and $134.2 million, respectively.

(3) Primarily includes interest expense and $394.0 million in impairment charges.

(4) Includes $32.0 million of capital lease payments included in Repayments of notes payable, credit facilities, term loan, senior notes, secured debt and capital leases in the cash flows from financing activities in the Company’s consolidated statements of cash flows.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

Additional information relating to the total assets of the Company’s operating segments is as follows for the years ended December 31,:

<table><tr><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>Total Assets (1):</td><td></td><td></td><td></td></tr><tr><td>U.S. &amp; Canada property</td><td>$ 27,352.9</td><td>$ 22,624.6</td><td>$ 18,782.0</td></tr><tr><td>Asia-Pacific property</td><td>5,191.8</td><td>5,307.8</td><td>4,938.8</td></tr><tr><td>Africa property</td><td>4,894.8</td><td>4,711.1</td><td>1,929.7</td></tr><tr><td>Europe property</td><td>1,868.6</td><td>1,535.3</td><td>1,438.1</td></tr><tr><td>Latin America property</td><td>7,434.2</td><td>8,125.5</td><td>5,594.7</td></tr><tr><td>Services</td><td>38.7</td><td>26.8</td><td>46.3</td></tr><tr><td>Other (2)</td><td>452.5</td><td>470.5</td><td>280.8</td></tr><tr><td>Total assets</td><td>$ 47,233.5</td><td>$ 42,801.6</td><td>$ 33,010.4</td></tr></table>

(1) Balances are translated at the applicable period end exchange rate, which may impact comparability between periods.

(2) Balances include corporate assets such as cash and cash equivalents, certain tangible and intangible assets and income tax accounts that have not been allocated to specific segments.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

Summarized geographic information related to the Company’s operating revenues for the years ended December 31, 2020, 2019 and 2018 and long-lived assets as of December 31, 2020 and 2019 is as follows:

<table><tr><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>Operating Revenues:</td><td></td><td></td><td></td></tr><tr><td>U.S. &amp; Canada:</td><td></td><td></td><td></td></tr><tr><td>Canada (1) (2)</td><td>$ 0.3</td><td>$ —</td><td>$ —</td></tr><tr><td>United States</td><td>4,604.6</td><td>4,304.1</td><td>3,947.5</td></tr><tr><td>Asia-Pacific (2):</td><td></td><td></td><td></td></tr><tr><td>Australia (1)</td><td>0.0</td><td>—</td><td>—</td></tr><tr><td>India</td><td>1,139.4</td><td>1,217.0</td><td>1,540.5</td></tr><tr><td>Africa (2):</td><td></td><td></td><td></td></tr><tr><td>Burkina Faso</td><td>43.9</td><td>—</td><td>—</td></tr><tr><td>Ghana</td><td>174.3</td><td>124.3</td><td>125.4</td></tr><tr><td>Kenya</td><td>97.7</td><td>27.3</td><td>7.0</td></tr><tr><td>Niger</td><td>40.0</td><td>—</td><td>—</td></tr><tr><td>Nigeria</td><td>249.5</td><td>229.9</td><td>220.7</td></tr><tr><td>South Africa</td><td>128.7</td><td>129.1</td><td>125.3</td></tr><tr><td>Uganda</td><td>156.1</td><td>73.3</td><td>67.1</td></tr><tr><td>Europe (2):</td><td></td><td></td><td></td></tr><tr><td>France</td><td>79.4</td><td>68.0</td><td>72.7</td></tr><tr><td>Germany</td><td>70.0</td><td>66.6</td><td>69.1</td></tr><tr><td>Poland (1)</td><td>0.2</td><td>—</td><td>—</td></tr><tr><td>Latin America (2):</td><td></td><td></td><td></td></tr><tr><td>Argentina</td><td>22.1</td><td>17.3</td><td>16.0</td></tr><tr><td>Brazil</td><td>506.4</td><td>605.5</td><td>595.5</td></tr><tr><td>Chile</td><td>67.3</td><td>43.3</td><td>44.2</td></tr><tr><td>Colombia</td><td>96.1</td><td>102.1</td><td>103.8</td></tr><tr><td>Costa Rica</td><td>23.4</td><td>21.1</td><td>18.4</td></tr><tr><td>Mexico</td><td>483.0</td><td>515.3</td><td>456.5</td></tr><tr><td>Paraguay</td><td>12.5</td><td>12.6</td><td>10.4</td></tr><tr><td>Peru</td><td>46.6</td><td>23.5</td><td>20.0</td></tr><tr><td>Total operating revenues</td><td>$ 8,041.5</td><td>$ 7,580.3</td><td>$ 7,440.1</td></tr></table>

(1) The Company launched operations in Canada and Australia through the InSite Acquisition, which closed on December 23, 2020. The Company launched operations in Poland through the Poland Acquisition, which closed on June 16, 2020.

(2) Balances are translated at the applicable exchange rate, which may impact comparability between periods.



## AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

<table><tr><td></td><td>2020</td><td>2019</td></tr><tr><td>Long-Lived Assets (1):</td><td></td><td></td></tr><tr><td>U.S. &amp; Canada:</td><td></td><td></td></tr><tr><td>Canada (2)</td><td>$ 373.7</td><td>$ —</td></tr><tr><td>United States</td><td>19,977.8</td><td>16,578.7</td></tr><tr><td>Asia-Pacific (2):</td><td></td><td></td></tr><tr><td>Australia</td><td>20.0</td><td>—</td></tr><tr><td>India</td><td>3,482.3</td><td>3,708.8</td></tr><tr><td>Africa (2):</td><td></td><td></td></tr><tr><td>Burkina Faso</td><td>315.7</td><td>275.3</td></tr><tr><td>Ghana</td><td>676.8</td><td>671.0</td></tr><tr><td>Kenya</td><td>730.0</td><td>761.7</td></tr><tr><td>Niger</td><td>215.7</td><td>199.8</td></tr><tr><td>Nigeria</td><td>663.7</td><td>648.6</td></tr><tr><td>South Africa</td><td>424.4</td><td>409.4</td></tr><tr><td>Uganda</td><td>867.3</td><td>847.3</td></tr><tr><td>Europe (2):</td><td></td><td></td></tr><tr><td>France</td><td>1,176.5</td><td>917.1</td></tr><tr><td>Germany</td><td>370.9</td><td>357.3</td></tr><tr><td>Poland</td><td>2.9</td><td>—</td></tr><tr><td>Latin America (2):</td><td></td><td></td></tr><tr><td>Argentina</td><td>111.9</td><td>100.0</td></tr><tr><td>Brazil</td><td>1,629.9</td><td>2,138.4</td></tr><tr><td>Chile</td><td>538.7</td><td>437.6</td></tr><tr><td>Colombia</td><td>350.7</td><td>375.2</td></tr><tr><td>Costa Rica</td><td>123.1</td><td>124.1</td></tr><tr><td>Mexico</td><td>1,395.2</td><td>1,524.9</td></tr><tr><td>Paraguay</td><td>103.6</td><td>111.3</td></tr><tr><td>Peru</td><td>380.4</td><td>394.6</td></tr><tr><td>Total long-lived assets</td><td>$ 33,931.2</td><td>$ 30,581.1</td></tr></table>

(1) Includes Property and equipment, net, Goodwill and Other intangible assets, net.

(2) Balances are translated at the applicable period end exchange rate, which may impact comparability between periods.

The following tenants within the property and services segments individually accounted for 10% or more of the Company’s consolidated operating revenues for the years ended December 31,:

<table><tr><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>AT&amp;T</td><td>22 %</td><td>22 %</td><td>19 %</td></tr><tr><td>T-Mobile</td><td>19 %</td><td>10 %</td><td>9 %</td></tr><tr><td>Verizon Wireless</td><td>14 %</td><td>15 %</td><td>15 %</td></tr></table>

## 22. RELATED PARTY TRANSACTIONS

During the years ended December 31, 2020, 2019 and 2018, the Company had no significant related party transactions.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

## 23. SUBSEQUENT EVENTS

Pending Telxius Acquisition—On January 13, 2021, the Company entered into two agreements with Telxius Telecom, S.A. (“Telxius”), a subsidiary of Telefónica, S.A., pursuant to which the Company expects to acquire Telxius’ European and Latin American tower divisions, comprising approximately 31,000 communications sites in Argentina, Brazil, Chile, Germany, Peru and Spain, for approximately 7.7 billion EUR (approximately $9.4 billion at the date of signing) (the “Pending Telxius Acquisition”), subject to limited adjustments. The Pending Telxius Acquisition is expected to close in tranches beginning in the second quarter of 2021, subject to customary closing conditions, including government and regulatory approval.

Repayment of the 2020 Term Loan—On February 5, 2021, the Company repaid all amounts outstanding under the 2020 Term Loan with borrowings from the 2019 Multicurrency Credit Facility and cash on hand.

Amendments to Bank Facilities—On February 10, 2021, the Company amended and restated the 2019 Multicurrency Credit Facility and the 2019 Credit Facility and entered into an amendment agreement with respect to the 2019 Term Loan.

These amendments, among other things,

i. extend the maturity dates by one year to June 28, 2024 and January 31, 2026 for the 2019 Multicurrency Credit Facility and the 2019 Credit Facility, respectively,

ii. increase the commitments under the 2019 Multicurrency Credit Facility and the 2019 Credit Facility to $4.1 billion and $2.9 billion, respectively, of which 1.3 billion EUR borrowed under the 2019 Multicurrency Credit Facility is to be reserved to finance the Pending Telxius Acquisition,

iii. increase the maximum Revolving Loan Commitments, after giving effect to any Incremental Commitments (each as defined in the loan agreements for each of the 2019 Multicurrency Credit Facility and the 2019 Credit Facility) to $6.1 billion and $4.4 billion under the 2019 Multicurrency Credit Facility and the 2019 Credit Facility, respectively,

iv. expand the sublimit for multicurrency borrowings under the 2019 Multicurrency Credit Facility from $1.0 billion to $3.0 billion and add a EUR borrowing option for the 2019 Credit Facility with a $1.5 billion sublimit,

v. amend the limitation of the Company’s permitted ratio of Total Debt to Adjusted EBITDA (each as defined in each of the loan agreements for each of the facilities) to be no greater than 7.50 to 1.00 for the four fiscal quarters following the consummation of the Pending Telxius Acquisition, stepping down to 6.00 to 1.00 thereafter (with a further step up to 7.00 to 1.00 if the Company consummates a Qualified Acquisition (as defined in each of the loan agreements for the facilities)),

vi. amend the limitation on indebtedness of, and guaranteed by, the Company’s subsidiaries to the greater of (a) $3.0 billion and (b) 50% of Adjusted EBITDA (as defined in each of the loan agreements for the facilities) of the Company and its subsidiaries on a consolidated basis and

vii. increase the threshold for certain defaults with respect to judgments, attachments or acceleration of indebtedness from $400.0 million to $500.0 million.

2021 Delayed Draw Term Loans—On February 10, 2021, the Company entered into (i) a 1.1 billion EUR (approximately $1.3 billion at the date of signing) unsecured term loan, the proceeds of which are to be used to fund the Pending Telxius Acquisition, with a maturity date that is 364 days from the date of the first draw thereunder and bears interest at a rate based on the senior unsecured debt rating of the Company, which, based on the Company’s current debt ratings, is 1.000% above the Euro Interbank Offered Rate (“EURIBOR”) (the “2021 364-Day Delayed Draw Term Loan”) and (ii) an 825.0 million EUR (approximately $1.0 billion at the date of signing) unsecured term loan, the proceeds of which are to be used to fund the Pending Telxius Acquisition, with a maturity date that is three years from the date of the first draw thereunder and bears interest at a rate based on the senior unsecured debt rating of the Company, which, based on the Company’s current debt ratings, is 1.125% above EURIBOR (the “2021 Three Year Delayed Draw Term Loan,” and, together with the 2021 364-Day Delayed Draw Term Loan, the “2021 Delayed Draw Term Loans”).

The loan agreements for the 2021 Delayed Draw Term Loans contain certain reporting, information, financial and operating covenants and other restrictions (including limitations on additional debt, guaranties, sales of assets and liens) with which the Company must comply. Failure to comply with the financial and operating covenants of the loan agreements could not only prevent the Company from being able to borrow additional funds under the revolving credit facilities, but may constitute a default, which could result in, among other things, the amounts outstanding, including all accrued interest and unpaid fees, becoming immediately due and payable.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(Tabular amounts in millions, unless otherwise disclosed)

Bridge Facility—In connection with entering into the Pending Telxius Acquisition, the Company entered into a commitment letter (the “Commitment Letter”), dated January 13, 2021, with Bank of America, N.A. and BofA Securities, Inc. (together, “BoA”) pursuant to which BoA has committed to provide up to 7.5 billion EUR (approximately $9.1 billion at date of signing) in bridge loans (the “Bridge Loan Commitment”) to ensure financing for the Pending Telxius Acquisition. Effective February 10, 2021, the Bridge Loan Commitment was reduced to 4.275 billion EUR (approximately $5.2 billion at the date of signing) as a result of an aggregate of 3.225 billion EUR (approximately $3.9 billion at the date of signing) of additional committed amounts under the 2019 Multicurrency Credit Facility, the 2019 Credit Facility and the 2021 Delayed Draw Term Loans, as described above.

The Commitment Letter contains, and the credit agreement in respect of the Bridge Loan Commitment, if any, will contain, certain customary conditions to funding, including, without limitation, (i) the execution and delivery of definitive financing agreements for the Bridge Loan Commitment and (ii) other customary closing conditions set forth in the Commitment Letter. The Company will pay certain customary commitment fees and, in the event it makes any borrowings in connection with the Bridge Loan Commitment, funding and other fees.



# AMERICAN TOWER CORPORATION AND SUBSIDIARIES
SCHEDULE III—SCHEDULE OF REAL ESTATE
AND ACCUMULATED DEPRECIATION
(dollars in millions)

<table><tr><td>Description</td><td>Encumbrances</td><td>Initial cost to company</td><td>Cost capitalized subsequent to acquisition</td><td>Gross amount carried at close of current period</td><td>Accumulated depreciation at close of current period</td><td>Date of construction</td><td>Date acquired</td><td>Life on which depreciation in latest income statements is computed</td></tr><tr><td>183,860</td><td>Sites (1)</td><td>$ 3,136.7</td><td>(2)</td><td>(3)</td><td>$ 18,492.9</td><td>(4)</td><td>Various</td><td>Various</td></tr></table>

(1) No single site exceeds 5% of the total amounts indicated in the table above.

(2) Certain assets secure debt of $3.1 billion.

(3) The Company has omitted this information, as it would be impracticable to compile such information on a site-by-site basis.

(4) Does not include those sites under construction.

<table><tr><td></td><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>Gross amount at beginning</td><td></td><td>$ 17,429.3</td><td>$ 15,960.1</td><td>$ 15,349.0</td></tr><tr><td>Additions during period:</td><td></td><td></td><td></td><td></td></tr><tr><td>Acquisitions</td><td></td><td>722.4</td><td>887.0</td><td>721.4</td></tr><tr><td>Discretionary capital projects (1)</td><td></td><td>308.0</td><td>258.1</td><td>173.5</td></tr><tr><td>Discretionary ground lease purchases (2)</td><td></td><td>214.3</td><td>189.8</td><td>180.4</td></tr><tr><td>Redevelopment capital expenditures (3)</td><td></td><td>176.7</td><td>213.6</td><td>177.3</td></tr><tr><td>Capital improvements (4)</td><td></td><td>91.4</td><td>161.2</td><td>94.0</td></tr><tr><td>Start-up capital expenditures (5)</td><td></td><td>119.4</td><td>71.3</td><td>113.1</td></tr><tr><td>Other (6)</td><td></td><td>72.8</td><td>45.2</td><td>(3.0)</td></tr><tr><td>Total additions</td><td></td><td>1,705.0</td><td>1,826.2</td><td>1,456.7</td></tr><tr><td>Deductions during period:</td><td></td><td></td><td></td><td></td></tr><tr><td>Cost of real estate sold or disposed</td><td></td><td>(259.7)</td><td>(304.6)</td><td>(395.7)</td></tr><tr><td>Other (7)</td><td></td><td>(381.7)</td><td>(52.4)</td><td>(449.9)</td></tr><tr><td>Total deductions:</td><td></td><td>(641.4)</td><td>(357.0)</td><td>(845.6)</td></tr><tr><td>Balance at end</td><td></td><td>$ 18,492.9</td><td>$ 17,429.3</td><td>$ 15,960.1</td></tr><tr><td></td><td></td><td>2020</td><td>2019</td><td>2018</td></tr><tr><td>Gross amount of accumulated depreciation at beginning</td><td></td><td>$ (6,382.2)</td><td>$ (5,724.7)</td><td>$ (5,181.2)</td></tr><tr><td>Additions during period:</td><td></td><td></td><td></td><td></td></tr><tr><td>Depreciation</td><td></td><td>(771.5)</td><td>(768.4)</td><td>(751.4)</td></tr><tr><td>Other</td><td></td><td>—</td><td>—</td><td>—</td></tr><tr><td>Total additions</td><td></td><td>(771.5)</td><td>(768.4)</td><td>(751.4)</td></tr><tr><td>Deductions during period:</td><td></td><td></td><td></td><td></td></tr><tr><td>Amount of accumulated depreciation for assets sold or disposed</td><td></td><td>132.3</td><td>121.4</td><td>129.3</td></tr><tr><td>Other (7)</td><td></td><td>100.4</td><td>(10.5)</td><td>78.6</td></tr><tr><td>Total deductions</td><td></td><td>232.7</td><td>110.9</td><td>207.9</td></tr><tr><td>Balance at end</td><td></td><td>$ (6,921.0)</td><td>$ (6,382.2)</td><td>$ (5,724.7)</td></tr></table>

(1) Includes amounts incurred primarily for the construction of new sites.

(2) Includes amounts incurred to purchase or otherwise secure the land under communications sites.

(3) Includes amounts incurred to increase the capacity of existing sites, which results in new incremental tenant revenue.

(4) Includes amounts incurred to enhance existing sites by adding additional functionality, capacity or general asset improvements.

(5) Includes amounts incurred in connection with acquisitions or new market launches. Start-up capital expenditures includes non-recurring expenditures contemplated in acquisitions, new market launch business cases or initial deployment of new technologies or platform expansion initiatives that lead to an increase in site-level cash flow generation.

(6) Primarily includes regional improvements and other additions.

(7) Primarily includes foreign currency exchange rate fluctuations and other deductions.



# American Tower Corporation · 2020 Annual Report

## Appendix 1 • Letter to Stakeholders

## DEFINITIONS, RECONCILIATIONS TO MEASURES UNDER GAAP AND CALCULATION OF DEFINED MEASURES

## Adjusted EBITDA

Net income before income (loss) from equity method investments, income tax benefit (provision), other income (expense), gain (loss) on retirement of long-term obligations, interest expense, interest income, other operating income (expense), depreciation, amortization and accretion and stock-based compensation expense. The Company believes this measure provides valuable insight into the profitability of its operations while at the same time taking into account the central overhead expenses required to manage its global operations. In addition, it is a widely used performance measure across the telecommunications real estate sector.

## Adjusted EBITDA Margin

The percentage that results from dividing Adjusted EBITDA by total revenue.

## Nareit Funds From Operations (FFO), as defined by the National Association of Real Estate Investment Trusts (Nareit), attributable to American Tower Corporation common stockholders

Net income before gains or losses from the sale or disposal of real estate, real estate related impairment charges, real estate related depreciation, amortization and accretion and dividends on preferred stock, and including adjustments for (i) unconsolidated affiliates and (ii) noncontrolling interests. The Company believes this measure provides valuable insight into the operating performance of its property assets by excluding the charges described above, particularly depreciation expenses, given the high initial, up-front capital intensity of the Company's operating model. In addition, it is a widely used performance measure across the telecommunications real estate sector.

## Consolidated Adjusted Funds From Operations (AFFO)

Nareit FFO attributable to American Tower Corporation common stockholders before (i) straight-line revenue and expense, (ii) stock-based compensation expense, (iii) the deferred portion of income tax, (iv) non-real estate related depreciation, amortization and accretion, (v) amortization of deferred financing costs, capitalized interest, debt discounts and premiums and long-term deferred interest charges, (vi) other income (expense), (vii) gain (loss) on retirement of long-term obligations, (viii) other operating income (expense), and adjustments for (ix) unconsolidated affiliates and (x) noncontrolling interests, less cash payments related to capital improvements and cash payments related to corporate capital expenditures. The Company believes this measure provides valuable insight into the operating performance of its property assets by further adjusting the Nareit FFO attributable to American Tower Corporation common stockholders metric to exclude the factors outlined above, which if unadjusted, may cause material fluctuations in Nareit FFO attributable to American Tower Corporation common stockholders growth from period to period that would not be representative of the underlying performance of our property assets in those periods. In addition, it is a widely used performance measure across the telecommunications real estate sector.

## Consolidated AFFO per Share

Consolidated AFFO divided by the diluted weighted average common shares outstanding.

## Net Debt

Total long-term debt, including current portion and finance lease liabilities, less cash and cash equivalents.

## Net Leverage Ratio

Net Debt divided by the quarter's annualized Adjusted EBITDA (the quarter's Adjusted EBITDA multiplied by four). The Company believes that including this calculation is important for investors and analysts given it is a critical component underlying its credit agency ratings.

## NOI Yield

The percentage that results from dividing gross margin by total investment.

## Return on Invested Capital (ROIC)

Adjusted EBITDA less maintenance capital expenditures and corporate capital expenditures and cash taxes, divided by gross property, plant and equipment, intangible assets and goodwill (excluding the impact of recording deferred tax adjustments related to valuation).

## Tenant Billings

The majority of the Company’s revenue is generated from non-cancellable, long-term tenant leases. Revenue from Tenant Billings reflects several key aspects of the Company’s real estate business: (i) “colocations/amendments” reflects new tenant leases for space on existing sites and amendments to existing leases to add additional tenant equipment; (ii) “escalations” reflects contractual increases in billing rates, which are typically tied to fixed percentages or a variable percentage based on a consumer price index; (iii) “cancellations” reflects the impact of tenant lease terminations or non-renewals or, in limited circumstances, when the lease rates on existing leases are reduced; and (iv) “new sites” reflects the impact of new property construction and acquisitions.

## Organic Tenant Billings

Tenant Billings on sites that the Company has owned since the beginning of the prior-year period, as well as Tenant Billings activity on new sites that occurred after the date of their addition to the Company's portfolio.

## Organic Tenant Billings Growth

The portion of Tenant Billings Growth attributable to Organic Tenant Billings. The Company believes that organic growth is a useful measure of its ability to add tenancy and incremental revenue to its assets for the reported period, which enables investors and analysts to gain additional insight into the relative attractiveness, and therefore the value, of the Company's property assets.



## American Tower Corporation · 2020 Annual Report

## Appendix 1 • Letter to Stakeholders

<table><tr><td colspan="6">RECONCILIATION OF ADJUSTED EBITDA TO NET INCOME ($ in millions. Totals may not add due to rounding.)</td></tr><tr><td></td><td>2016</td><td>2017</td><td>2018 \( ^{1} \)</td><td>2019</td><td>2020</td></tr><tr><td>Net Income</td><td>970</td><td>1,225</td><td>1,265</td><td>1,917</td><td>1,692</td></tr><tr><td>Income tax provision (benefit)</td><td>156</td><td>31</td><td>(110)</td><td>(0)</td><td>130</td></tr><tr><td>Other expense (income)</td><td>48</td><td>(31)</td><td>(24)</td><td>(18)</td><td>241</td></tr><tr><td>Loss (gain) on retirement of long-term obligations</td><td>(1)</td><td>70</td><td>3</td><td>22</td><td>72</td></tr><tr><td>Interest expense</td><td>717</td><td>750</td><td>826</td><td>814</td><td>794</td></tr><tr><td>Interest income</td><td>(26)</td><td>(35)</td><td>(55)</td><td>(47)</td><td>(40)</td></tr><tr><td>Other operating expenses</td><td>73</td><td>256</td><td>513</td><td>166</td><td>266</td></tr><tr><td>Depreciation, amortization and accretion</td><td>1,526</td><td>1,716</td><td>2,111</td><td>1,778</td><td>1,882</td></tr><tr><td>Stock-based compensation expense</td><td>90</td><td>109</td><td>138</td><td>111</td><td>121</td></tr><tr><td>ADJUSTED EBITDA</td><td>3,553</td><td>4,090</td><td>4,667</td><td>4,745</td><td>5,156</td></tr><tr><td>Divided by total revenue</td><td>5,786</td><td>6,664</td><td>7,440</td><td>7,580</td><td>8,042</td></tr><tr><td>ADJUSTED EBITDA MARGIN</td><td>61%</td><td>61%</td><td>63%</td><td>63%</td><td>64%</td></tr></table>

<table><tr><td colspan="6">AFFO RECONCILIATION ($ in millions, except per share data. Totals may not add due to rounding.)</td></tr><tr><td></td><td>2016</td><td>2017</td><td>2018 \( ^{1} \)</td><td>2019</td><td>2020</td></tr><tr><td>Adjusted EBITDA</td><td>3,553</td><td>4,090</td><td>4,667</td><td>4,745</td><td>5,156</td></tr><tr><td>Straight-line revenue</td><td>(132)</td><td>(194)</td><td>(88)</td><td>(184)</td><td>(322)</td></tr><tr><td>Straight-line expense</td><td>68</td><td>62</td><td>58</td><td>44</td><td>52</td></tr><tr><td>Cash interest \( ^{2} \)</td><td>(694)</td><td>(723)</td><td>(807)</td><td>(800)</td><td>(824)</td></tr><tr><td>Interest income</td><td>26</td><td>35</td><td>55</td><td>47</td><td>40</td></tr><tr><td>Cash paid for income taxes</td><td>(96)</td><td>(137)</td><td>(164)</td><td>(147)</td><td>(146)</td></tr><tr><td>Dividends on preferred stock</td><td>(107)</td><td>(87)</td><td>(9)</td><td>-</td><td>-</td></tr><tr><td>Dividends to noncontrolling interest holders</td><td>-</td><td>(13)</td><td>(14)</td><td>(13)</td><td>(8)</td></tr><tr><td>Capital improvement Capex</td><td>(110)</td><td>(114)</td><td>(150)</td><td>(160)</td><td>(150)</td></tr><tr><td>Corporate Capex</td><td>(16)</td><td>(17)</td><td>(9)</td><td>(11)</td><td>(9)</td></tr><tr><td>Consolidated AFFO</td><td>2,490</td><td>2,902</td><td>3,539</td><td>3,521</td><td>3,788</td></tr><tr><td>Adjustments for noncontrolling interests</td><td>(90)</td><td>(147)</td><td>(349)</td><td>(79)</td><td>(25)</td></tr><tr><td>AFFO Attributable to Common Stockholders</td><td>2,400</td><td>2,755</td><td>3,191</td><td>3,442</td><td>3,764</td></tr><tr><td>Divided by weighted average diluted shares outstanding</td><td>429.3</td><td>431.7</td><td>443.0</td><td>445.5</td><td>446.1</td></tr><tr><td>Consolidated AFFO per Share</td><td>5.80</td><td>6.72</td><td>7.99</td><td>7.90</td><td>8.49</td></tr><tr><td>AFFO Attributable to Common Stockholders per Share</td><td>5.59</td><td>6.38</td><td>7.20</td><td>7.73</td><td>8.44</td></tr></table>

1 Includes one-time net positive impacts to 2018 Adjusted EBITDA and Consolidated AFFO related to the Company's settlement with Tata in Q4 2018.

2 In Q2 2019, the Company made a capitalized interest payment of approximately $14.2 million associated with the purchase of the shareholder loan previously held by its joint venture partner in Ghana. In Q1 2020, the Company made a capitalized interest payment of approximately $63.3 million associated with the acquisition of MTN's redeemable noncontrolling interests in each of our joint ventures in Ghana and Uganda. In each case, the deferred interest was previously expensed but excluded from Consolidated AFFO.



## American Tower Corporation · 2020 Annual Report

## Appendix 1 • Letter to Stakeholders

<table><tr><td colspan="6">RETURN ON INVESTED CAPITAL (ROIC) RECONCILIATION \( ^{1} \)  (in millions. Totals may not add due to rounding.)</td></tr><tr><td></td><td>2016 \( ^{2} \)</td><td>2017 \( ^{3} \)</td><td>2018 \( ^{3,4} \)</td><td>2019 \( ^{3} \)</td><td>2020 \( ^{3} \)</td></tr><tr><td>Adjusted EBITDA</td><td>3,743</td><td>4,149</td><td>4,725</td><td>4,917</td><td>5,280</td></tr><tr><td>Cash Taxes</td><td>(98)</td><td>(137)</td><td>(172)</td><td>(168)</td><td>(146)</td></tr><tr><td>Capital Improvement Capex</td><td>(159)</td><td>(115)</td><td>(150)</td><td>(160)</td><td>(150)</td></tr><tr><td>Corporate Capex</td><td>(27)</td><td>(17)</td><td>(9)</td><td>(11)</td><td>(9)</td></tr><tr><td>Numerator</td><td>3,459</td><td>3,880</td><td>4,394</td><td>4,579</td><td>4,974</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Gross PPE</td><td>15,652</td><td>16,950</td><td>17,717</td><td>19,326</td><td>20,672</td></tr><tr><td>Gross Intangibles</td><td>14,795</td><td>16,183</td><td>16,323</td><td>18,474</td><td>20,734</td></tr><tr><td>Gross Goodwill \( ^{5} \)</td><td>4,510</td><td>4,879</td><td>4,797</td><td>5,492</td><td>6,600</td></tr><tr><td>Denominator</td><td>34,957</td><td>38,012</td><td>38,837</td><td>43,292</td><td>48,006</td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ROIC</td><td>9.9%</td><td>10.2%</td><td>11.3%</td><td>10.6%</td><td>10.4%</td></tr></table>

1 Historical denominator balances reflect purchase accounting adjustments.

2 Represents Q4 2016 annualized numbers to account for full year impact of Vion Transaction.

3 Adjusted to annualize impacts of acquisitions closed throughout the year.

4 Positively impacted by the Company's settlement with Tata in Q4 2018.

5 Excludes the impact of deferred tax adjustments related to valuation.



## Executive Management Team



Thomas A. Bartlett
President and Chief
Executive Officer



Olivier Puech
Executive Vice President
and President, Latin America
and EMEA

## Directors





Edmund DiSanto
Executive Vice President, Chief
Administrative Officer, General
Counsel and Secretary



Rodney M. Smith
Executive Vice President,
Chief Financial Officer
and Treasurer





(From left to right) Pamela D.A. Reeve, Former President and CEO – Lighthouse, Inc.; Thomas A. Bartlett, President and CEO – American Tower Corporation; Raymond P. Dolan, Chairman and CEO – Cohere Technologies, Inc.; Kenneth R. Frank, CEO – Turning Technologies; Robert D. Hormats, Managing Director – Tideemann Advisors; Gustavo Lara Cantu, Former CEO – Monsanto Company, Latin America North Division





Sanjay Goel
Executive Vice President
and President, Asia-Pacific



Steven O. Vondran
Executive Vice President
and President, U.S. Tower
Division





(From left to right) Grace D. Lieblein, Former VP, Global Quality – General Motors; Craig Macnab, Former Chairman and CEO – National Retail Properties, Inc; JoAnn A. Reed, Former CFO – Medco Health Solutions, Inc.; David E. Sharbutt, Former Chairman and CEO – Alamosa Holdings, Inc.; Bruce L. Tanner, Former EVP and CFO – Lockheed Martin Corporation; Samne L. Thompson, President – Telit Associates, Inc.

## Certifications

The certifications by the Company’s CEO and CFO required under Section 302 of the Sarbanes-Oxley Act of 2002 have been filed as exhibits to the Company’s 2020 Annual Report on Form 10-K. The Annual CEO Certification pursuant to New York Stock Exchange (NYSE) Corporate Governance Standards Section 303A.12(a) was submitted to the NYSE on June 3, 2020.

## Non-incorporation

The Company’s Form 10-K for the year ended December 31, 2020, as filed with the Securities and Exchange Commission, is included within this Annual Report. Other than the 2020 Form 10-K, all other portions of this Annual Report are not “filed” with the Securities and Exchange Commission and should not be deemed so.

## Annual Meeting

The annual meeting of stockholders will be held on Wednesday, May 26, 2021 and is scheduled to commence at 11:00 a.m., Eastern Time.

Stockholders may attend the annual meeting virtually through a live audio webcast at: www.virtualshareholdermeeting.com/AMT2021

There will be no physical location for the meeting.

Corporate Headquarters
116 Huntington Avenue
Boston, MA 02116

Registrar and Stock
Transfer Agent
Computershare

Common Stock
The Company’s Common Stock is traded on the NYSE under the symbol AMT.

Independent Registered Public Accounting Firm
Deloitte & Touche LLP



116 Huntington Avenue
Boston, Massachusetts 02116
T: 617-375-7500
F: 617-375-7575
american tower.com