SBA Communications Corporation (SBAC, NASDAQ)
Industry: REIT - Specialty
Annual report, fiscal year 2018



YOUR
SIGNAL
STARTS
HERE.







## Table of Contents

1 CELL TOWERS PAGE 02
2 INTERNATIONAL MARKETS PAGE 04
3 NEW FRONTIERS PAGE 07
4 A BRIGHT FUTURE AHEAD PAGE 09
5 SBA CARES PAGE 10
6 FINANCIAL HIGHLIGHTS PAGE 12
7 TO OUR SHAREHOLDERS PAGE 15
8 FORM 10-K PAGE 21



# CELL
TOWERS

## Business Critical for the Future

Macro sites remain the cornerstone of the wireless infrastructure industry. Growth in our industry continues to be driven by the insatiable demand for real-time mobile data and video, a growing number of smart devices, and new technologies and applications.

Upgrades to our customers' wireless networks through the deployment and refarming of spectrum bands continue to drive organic leasing revenue growth. New or redeployed spectrum requires support by new equipment that will be located on our sites, in particular MIMO and Massive MIMO antennas – technology that supports new 5G deployment. Over






## MOBILE 5G

Mobile 5G will require the deployment of advanced radios and antennas across carrier macro footprints. With only a fraction of this deployment happening over the last year, the vast majority of the opportunity is still in front of us.
the next several years, deployment of fallow spectrum by the leading wireless carriers, upcoming spectrum auctions, the DISH deployment, FirstNet deployment, and other advances will help keep the U.S. market a very interesting and active place for infrastructure providers.

As our industry continues to evolve and expand, SBA is poised to leverage our core strengths – the assets that make communications work – to the benefit of our customers, through embracing new technologies at our tower sites and adding new high quality, exclusive assets to our portfolio.






## International
Markets

As we look beyond the United States, we aim to replicate our successful formula in new and exciting markets.

We remain focused on geographies with similar characteristics to that of the U.S. – solid competition among the carriers for network quality; reliable, growing appetite for wireless demand among users; and strong rule of law to protect our assets. Since entering our first international market in 2009, our focus has been on securing sites in locations where our customers want to be. As most of our international markets are in the earlier stages of their network buildup plans, we are well positioned to help our customers achieve their network goals and capture growth in the form of new leases and amendments. As networks transition from 3G to 4G and, in the not-so-distant-future, 4G to 5G, our cell sites remain a critical component of our customers' ever-evolving wireless infrastructure needs.











## New Frontiers

Mobile Edge Computing, Distributed Antenna Systems and Beyond



SBA has recently collaborated on the creation of an edge data center on one of our sites – making it the first edge tower site in the United States. This is the first of what we expect will be many sites in our extensive portfolio to become distributed network connectivity points for emerging 5G and edge computing applications.

Mobile edge computing is about densifying the global data center network so that computing and storage of data and content can happen closer to the end user. Future applications that might require edge computing include autonomous cars and drones, augmented reality and virtual reality games and experiences, remote surgery, as well as instant delivery of video and other content.

Edge computing offers lots of promise for SBA as a provider of essential communications infrastructure. While still early in its development, there is general agreement that cell towers are a logical location for edge computing to happen, as the process of deploying edge equipment requires available real estate, and ready access to power and fiber backhaul – the essential components of our macro sites.

## Distributed Antenna Systems

Distributed Antenna Systems (DAS) is another area in which SBA is leveraging properties where we have obtained exclusive rights to build and deploy networks.

With wireless data and video demands skyrocketing, and about 80 percent of all data traffic originating or terminating indoors, \( ^{*} \)  mobile users demand access to quality accessible networks in every type of venue including commercial space, retail, healthcare, airports, stadiums and campus settings.

SBA offers seamless coverage and capacity solutions for all these venues via DAS, small cells and other in-building



## Distributed Antenna Systems (Continued)

network technologies. Our DAS offering is unique: We fund the network and negotiate directly with wireless customers. We represent the property owners and handle the entire deployment process as well as the ongoing maintenance and monitoring of the system. Via our exclusive rights arrangements, we provide a neutral host network that accommodates all carriers, thus avoiding redundant equipment, multiple vendor installations and upgrades, or future construction disruption to the venue. We know the technology roadmap too, so the network we build will help owners monetize their property today and provide the benefit of new technologies in the future.






# A Bright
Future Ahead

Macro cells have been the anchor of the wireless infrastructure industry for decades, and they will continue to be the mainstay for wireless connectivity as networks – driven by spectrum – evolve to support increased data consumption and deliver fifth-generation technology to connect billions of people and billions of things with unprecedented processing power, storage capacity and speed.

## Our Approach

As an industry leader, SBA has participated in the creation of the shared infrastructure model for carriers that helped to facilitate the expansion of the mobile industry.

Our investment strategy has not changed over time: We pursue the same strategies in emerging technologies that we do with our macro sites. We look for opportunities to invest in high quality real estate that provide a level of exclusivity to accommodate multiple wireless carriers. This strategy has benefitted our shareholders for nearly 20 years and, as our industry evolves and change presents us with new opportunities, we are confident that this approach will continue to provide benefits.

Our macro business model is built on stable industry attributes. It offers business-critical infrastructure to communications providers; wireless players continue to innovate and make substantial network investments; and governments at every level see the social/economic benefits of expanded wireless broadband for their communities.

The wireless world is transforming quickly, and so is SBA. We remain innovative and dedicated to meeting our customers' needs. In a fast-moving environment, our strategic real estate holdings, our efficient and full-service lease-up processes, and our trusted, knowledgeable and experienced teams are the SBA assets that make communications work.



## SBA Cares

Philanthropy remains an essential focus for SBA.

Philanthropy remains an essential focus for SBA. While we are a leader in owning and operating wireless infrastructure, at our core we believe in the importance of putting people and communities first.



## SBA cares

We are proud of the impact our employees have in supporting their communities and the nonprofits that they care deeply about. More than 100 different charitable organizations each year – located across a wide geography – benefit through our corporate philanthropic program “SBA Cares”. We empower our employees to donate and volunteer to organizations of their choice that meet our program guidelines. We offer both team and individual volunteer time off, as well as contributions to match employee charitable giving. While participation is voluntary, our program continues to grow more vibrant and impactful each year. Through companywide philanthropic initiatives, we support critical outreach efforts for tower industry foundations and military veterans. In their local communities, our employees engage in an array of activities: partnering with nonprofits to preserve the environment and wildlife; constructing affordable housing units, sheltering lost, homeless and unwanted animals and providing services and care for companion animals. Other volunteer efforts include care and support of foster children; food collection and food bank assistance in efforts to end hunger in local communities; mentoring activities for the disabled; and volunteer and fundraising activities to support research, education and critical programs in the fight against major illnesses.

Through their compassionate giving and volunteering, our people truly help to “Change Lives”. As a company, we are committed to extending our philanthropic efforts and reach to the people, communities, businesses, customers and industry we serve.



A few snapshots of SBA employees committed to “Change Lives”.







































































## Financial
Highlights







## +7.2%

Site leasing revenue for the year 2018 was $1,740 million compared to $1,623 million for the year 2017; an increase of 7.2%.

## +8.3%

Site leasing segment operating profit for the year 2018 was $1,368 million compared to $1,264 million for the year 2017; an increase of 8.3%.






## 2017 vs 2018

<table><tr><td>In thousands (except per share data) for year ended December 31,</td><td>2017</td><td>2018</td><td>% Change</td></tr><tr><td>Revenues</td><td></td><td></td><td></td></tr><tr><td>Site Leasing</td><td>$1,623,173</td><td>$1,740,434</td><td>7.2%</td></tr><tr><td>Site Development</td><td>$104,501</td><td>$125,261</td><td>19.9%</td></tr><tr><td>Total Revenues</td><td>$1,727,674</td><td>$1,865,695</td><td>8.0%</td></tr><tr><td>Cost of Revenues</td><td></td><td></td><td></td></tr><tr><td>Site Leasing</td><td>$359,527</td><td>$372,296</td><td>3.6%</td></tr><tr><td>Site Development</td><td>$86,785</td><td>$96,499</td><td>11.2%</td></tr><tr><td>Total Cost of Revenues</td><td>$446,312</td><td>$468,795</td><td>5.0%</td></tr><tr><td>Operating Profit</td><td></td><td></td><td></td></tr><tr><td>Site Leasing</td><td>$1,263,646</td><td>$1,368,138</td><td>8.3%</td></tr><tr><td>Site Development</td><td>$17,716</td><td>$28,762</td><td>62.4%</td></tr><tr><td>Total Operating Profit</td><td>$1,281,362</td><td>$1,396,900</td><td>9.0%</td></tr><tr><td>Selling, general &amp; administrative expenses</td><td>$130,697</td><td>$142,526</td><td>9.1%</td></tr><tr><td>Net income attributable to SBA Communications Corporation</td><td>$103,654</td><td>$47,451</td><td></td></tr><tr><td>Basic &amp; diluted net income per share</td><td>$0.86</td><td>$0.41</td><td></td></tr><tr><td>Weighted average number of shares (basic)</td><td>119,860</td><td>114,909</td><td></td></tr><tr><td>Weighted average number of shares (diluted)</td><td>121,022</td><td>116,515</td><td></td></tr><tr><td>As of December 31, cash, cash equivalents, short-term investments and short-term restricted cash</td><td>$101,937</td><td>$176,147</td><td></td></tr><tr><td>Total Assets</td><td>$7,320,205</td><td>$7,213,707</td><td></td></tr><tr><td>Total Principal Amount of Indebtedness</td><td>$9,405,000</td><td>$10,028,000</td><td></td></tr></table>



## To Our
Shareholders

I believe there is no better business than the tower model and our reported financials support that statement.

2018 was another exciting and productive year for SBA. Through strong leasing activity, low customer churn and strict cost controls, we were able to show yet again why the tower business is so highly regarded. I believe there is no better business than the tower model and our reported financials support that statement. We produced record-breaking margins, solid organic growth and raised our full year 2018 guidance each and every quarter. We provided essential support to our customers as they worked towards providing enhanced wireless services and the latest wireless technologies across their markets. We drove value to our shareholders by deploying capital towards

AS THE FUNDAMENTALS OF THE WIRELESS NETWORK ECOSYSTEM CONTINUE TO EVOLVE, WE WILL LOOK TO FIND WAYS TO ADAPT AND PROSPER FROM THE EVER CHANGING LANDSCAPE.

high quality assets, including by repurchasing our own stock. We worked with local communities and municipalities to help build better wireless. And most importantly, we positioned ourselves well for a solid 2019.

This year, 2019, we will celebrate our 30th year in business and our 20th year as a public company. Over the past thirty years, we’ve seen an explosion in wireless use cases. From simple voice calls and picture messaging in the early ‘90s on the 2G network, to web browsing and email on the 3G network, to FaceTiming and high definition video streaming on the 4G network.



Each network evolution more impressive than the last. As we look ahead from 4G to 5G in the coming years, we'll be more connected than ever. According to Cisco's 2019 VNI Mobile report, 4G connection generates about three times more traffic than a 3G connection. By 2022, the average 5G connection will generate nearly three times more traffic than the average 4G connection. That's more data consumption than I believe anyone could have imagined when we acquired our first tower in June 1997.

While a lot of the current industry attention is spent on 5G, 4G deployments have been the primary contributor to SBA's growth for nearly a decade and we believe there is much more to come. Looking ahead, 4G is still forecasted to maintain the majority of the market share for the foreseeable future. This will certainly be the case in our Latin American markets, perhaps for quite some time. While 5G will certainly be a key contributor to our growth in the future, we are most certainly living in a 4G world today. As such, our customers have remained extremely active deploying spectrum, both newly acquired as well as refarming existing spectrum. Our customers are busy across the board. In the United States, T-Mobile has continued to deploy low band 600MHz and 700MHz spectrum. AT&T has been busy deploying Band 14 spectrum as FirstNet continues to ramp as well as fallow AWS and WCS frequencies. Sprint has been active rolling out 800MHz, PCS and 2.5GHz as they boost their LTE footprint. Verizon spent much of 2018 refarming its spectrum from legacy services to free up frequencies for future LTE uses. We even saw an emergence from Dish as they take the steps necessary to roll out their IoT network in 2020. In addition to our customers' existing spectrum holdings, of which a large portion has yet to be deployed, new spectrum bands are on the horizon including low band, CBRS, C-Band and mmWave. As new bands start to enter the wireless ecosystem, we expect that our assets and services resources will remain center stage for many years to come. Similar types of current customer activity and future spectrum opportunities are present in our international markets.

Looking into the future, we're just at the beginning of 5G, with field trials underway and standards set to be finalized in 2020. Like most generational shifts, we would expect our customers to focus on the urban centers first, then more suburban and rural. But what does 5G really mean? Basically, it means faster speeds, much greater reliability and ultra-low latency. With that extra boost of speed and reliability, new transformative use cases will likely emerge changing the way we learn and interact. Cutting edge technologies are already underway, technologies such as augmented virtual reality, data intensive mobile apps, wearable devices, wireless sensors and monitoring, factory automation, driverless cars, smart cities and machine learning to name a few – and the numerous use cases not yet imagined. It's truly an exciting time to be in the wireless industry. However, as networks change, one thing stays the same – the need for towers. We believe towers will always be a critical part of the overall wireless infrastructure and over the past three decades, history has borne that out. Networks have changed, but SBA has stayed focused on our core business, erecting towers in locations where consumers and wireless providers want to be. As the end users demand more from their wireless devices, we'll be there to help support our customers meet those network demands.

As the fundamentals of the wireless network ecosystem continue to evolve, we will look to find ways to adapt and prosper from the ever changing landscape. In 2018, we developed a number of exclusive wireless infrastructure assets outside of our traditional macro-site tower focus, two of which I’ll highlight here. First, we successfully deployed the first-ever mobile edge computing (MEC) module at a tower site in the United States. The site is located near Gillette Stadium, home of the New England Patriots and a venue with a capacity of over 60,000 people. This system was designed to house compute and storage capabilities near our cell site to reduce latency by eliminating portions of the data transport process. Second, in the landmark Macy’s Herald Square location in New York City, we constructed, and now own and operate, a very sophisticated indoor distributed antenna system. Macy’s Herald Square is the flagship of the Macy’s department store chain covering over two million square feet and an estimated twenty-three million shoppers per year.



We successfully designed and built a neutral host network system which allows our carrier customers to provide reliable mobile wireless services even in the most populated and complex radio-frequency design locations.

Both Herald Square and the MEC module at Gillette Stadium are examples of exciting first steps for us to dig deeper to find new ways to participate in the evolving world of wireless infrastructure. As we move forward we will focus on finding those exclusive assets which offer many of the same attributes as we have observed in our tower portfolio – high barriers to entry, high operating leverage, low ongoing capital intensity and high customer renewal rates. While we expect that towers will always be our primary focus, we do see opportunities for tangential expansion into areas where we can add value for our customers and create value for our shareholders.

# Turning to our operating
results for 2018, I am
pleased with our overall
performance.

We grew the portfolio by 6%, within our annual goal of 5 to 10% growth. Internationally, we acquired over 1,000 sites and built almost 400, the largest portion of growth coming from El Salvador and Brazil. We also grew in the United States, albeit at a lower rate, growing the portfolio by approximately 300 sites, mostly through acquisitions. Our gross same tower year-over-year growth rates, which represent newly added revenue over the prior twelve months, increased every quarter, ending the year at 7.4% and 11.3% in the U.S. and internationally, respectively. These levels are the highest since 2016 and are the result of a very robust level of leasing activity we saw over the last twelve months. In Brazil, our largest market outside of the U.S.,



Steven E. Bernstein
Founder and Chairman of the Board



Jeffrey A. Stoops
Director, President and
Chief Executive Officer



Kevin L. Beebe
Director



Brian C. Carr
Director



Mary S. Chan
Director



Duncan H. Cocroft
Director



George R. Krouse Jr.
Director



Jack Langer
Director



we posted 12.7% gross organic growth, on a constant currency basis, reflective of strong leasing activity we enjoyed throughout the year from each of the Big 4 carriers; Claro, Vivo, Oi and TIM. The currency in Brazil weakened slightly in 2018 compared to 2017, which impacted our reported results relative to our strong operating results. Our underlying business in Brazil remains very strong and we continue to outperform our original underwriting assumptions. We're optimistic the Brazilian economy is headed in the right direction and we are excited about the opportunities that should provide us.

On the back of solid revenue growth and strong cost controls, we posted industry leading operating margins, ending 2018 with our highest domestic tower cash flow margin ever, hitting an all-time high of 82.9% in the fourth quarter. We spent just over $400 million on acquisitions and approximately $65 million on new builds, levels similar to that of 2017. As we deploy capital, we continuously monitor our return on invested capital (ROIC), an important metric by which we gauge the success of our capital deployment strategy. I am pleased to see we ended the year with an ROIC of 10.3%, the highest percentage going back several years. A line item not included in the ROIC calculation, but equally as important to our growth in AFFO per share, is share repurchases. We repurchased approximately $796 million of stock in 2018, a level similar to that of 2017. We retired 5.0 million shares over the course of the year ending 2018 with 112.4 million shares outstanding, down 3.4% from the prior year. We always prefer to reduce share count, not expand share count, and expect share repurchases to be a meaningful part of our capital allocation as we move further into 2019. We ended the year at 7.3x net debt to annualized adjusted EBITDA, in the middle of our targeted 7.0x to 7.5x range. We successfully raised over $3 billion in 2018 in the debt capital markets at extremely attractive pricing, a testament to our preferred borrower status and the predictability and steadiness of the underlying cash flow. I have always believed there is no better business than towers to take advantage of attractively priced capital and a strong balance sheet.
In summary, I was pleased with our execution and results in 2018. We focused on maximizing growth, controlling costs, strategically growing our footprint, deploying capital and creating shareholder value. Moving into 2019, we expect to build on the great leasing year we had in 2018 and maintain a hyper-focused approach on maximizing our core tower business. I believe we have the greatest telecommunications assets in the world and demand for wireless services has never been higher. We are extremely excited about the years to come and look forward to the new wave of wireless.

In closing, I must recognize the contributions of our employees and customers to our success. I also want to thank you, our shareholders, for your continued confidence in and support of SBA. I look forward to communicating with you again soon.

Sincerely,

S. Stoop

Jeffrey A. Stoops

President and Chief Executive Officer







## YOUR
SIGNAL
STARTS
HERE.




FORM
10-K

2018 Financial Information



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

FORM 10-K

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2018
OR

☐ 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: 001-16853

# SBA COMMUNICATIONS CORPORATION

(Exact name of Registrant as specified in its charter)

Florida
(State or other jurisdiction of incorporation or organization)

8051 Congress Avenue
Boca Raton, Florida
(Address of principal executive offices)

65-0716501
(I.R.S. Employer Identification No.)

33487
(Zip Code)

Registrant’s telephone number, including area code (561) 995-7670

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

Title of Each Class
Class A Common Stock, $0.01 par value per share

Name of Each Exchange on Which Registered
The NASDAQ Stock Market LLC
(NASDAQ Global Select Market)

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 Exchange 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 if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. ☒

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a 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.

Large accelerated filer ☒

Non-Accelerated filer ☐

Accelerated filer ☐

Smaller reporting company ☐



Emerging growth company ☐

If an emerging growth company, indicate by checkmark 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 is a shell company (as defined in Rule 12b-2 of the Exchange Act) Yes ☐ No ☒

The aggregate market value of the voting stock held by non-affiliates of the Registrant was approximately $18.8 billion as of June 30, 2018.

The number of shares outstanding of the Registrant’s common stock (as of February 21, 2019): Class A common stock — 112,589,177.

## Documents Incorporated By Reference

Portions of the Registrant’s definitive proxy statement for its 2019 annual meeting of shareholders, which proxy statement will be filed no later than 120 days after the close of the Registrant’s fiscal year ended December 31, 2018, are hereby incorporated by reference in Part III of this Annual Report on Form 10-K.



## PART I

ITEM 1. BUSINESS 1
ITEM 1A. RISK FACTORS 7
ITEM 2. PROPERTIES 20
ITEM 3. LEGAL PROCEEDINGS 21
ITEM 4. MINE SAFETY DISCLOSURE 21
PART II
ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES 21
ITEM 6. SELECTED FINANCIAL DATA 23
ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS 24
ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK 48
ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA 51
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE 52
ITEM 9A. CONTROLS AND PROCEDURES 52
PART III
ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE 54
ITEM 11. EXECUTIVE COMPENSATION 54
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS 54
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE 55
ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES 55
PART IV
ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES 55
ITEM 16. FORM 10-K SUMMARY 60
SIGNATURES 61



## General

We are a leading independent owner and operator of wireless communications infrastructure, including tower structures, rooftops, and other structures that support antennas used for wireless communications, which we collectively refer to as “towers” and the location of the towers as “sites.” Our principal operations are in the United States and its territories. In addition, we own and operate towers in South America, Central America, and Canada. Our primary business line is our site leasing business, which contributed 98.0% of our total segment operating profit for the year ended December 31, 2018. In our site leasing business, we (1) lease antenna space to wireless service providers on towers that we own or operate and (2) manage rooftop and tower sites for property owners under various contractual arrangements. As of December 31, 2018, we owned 29,578 towers, a substantial portion of which have been built by us or built by other tower owners or operators who, like us, have built such towers to lease space to multiple wireless service providers. We also managed or leased approximately 9,700 actual or potential sites, approximately 500 of which were revenue producing as of December 31, 2018. Our other business line is our site development business, through which we assist wireless service providers in developing and maintaining their own wireless service networks.

## Business Strategy

Our primary strategy is to continue to focus on expanding our site leasing business through organic growth and expansion of our tower portfolio to create shareholder value. We believe that the long-term and repetitive nature of the revenue stream of our site leasing business will permit us to maintain a stable, recurring cash flow stream and reduce our exposure to cyclical changes in customer spending which arises in our site development business. Key elements of our strategy include:

## Organic Growth.

- Maximizing our Tower Capacity. We generally have constructed or acquired towers that accommodate multiple tenants and a majority of our towers are high capacity tower structures. Most of our towers have significant capacity available for additional antennas, and we believe that increased use of our towers can generate additional lease revenue and be achieved at a low incremental cost. We measure the available capacity of our existing sites to support additional tenants by assessing several factors, including tower height, tower type, wind loading, environmental conditions, existing equipment on the tower and zoning and permitting regulations in effect in the jurisdiction where the tower is located. We actively market space on our towers through our internal sales force. As of December 31, 2018, we had an average of 1.8 tenants per tower structure.

- Capitalizing on our Scale and Management Experience. We are a large owner, operator and developer of towers, with substantial capital, human, and operating resources. We have been developing towers for wireless service providers in the U.S. since 1989 and owned and operated towers for ourselves since 1997. We believe our size, experience, capabilities, and resources make us a preferred partner for wireless service providers both in the U.S. and internationally. Our management team has extensive experience in site leasing and site development, with some of the longest tenures in the tower and site development industries. We believe that our industry expertise and strong relationships with wireless service providers will permit us to continue to organically grow our site leasing and site development services.

Systematic Tower Portfolio Growth. We believe that our tower operations are highly scalable. Consequently, we believe that we are able to materially increase our domestic and international tower portfolio without proportionately increasing selling, general, and administrative expenses. Consequently, we intend to continue to grow our tower portfolio, domestically and internationally, through tower acquisitions and the construction of new tower structures. We believe that one of the best uses of our liquidity, including cash from operating activities and borrowings, is to acquire and/or build new towers at prices that we believe will be accretive to our shareholders both in the short and long term and which allow us to maintain our long-term target leverage ratios.

- Disciplined Tower Acquisitions – In our tower acquisition program, we pursue towers from third parties, domestically and internationally, that meet or exceed our internal guidelines regarding current and future potential returns. For each acquisition, we prepare various analyses that include projections of several different investment return metrics, review of available capacity, future lease up projections, and a summary of current and future tenant/technology mix.

- International Tower Growth – The majority of our international markets typically have less mature wireless networks with limited wireline infrastructure and lower wireless data penetration rates than those in the United States. Accordingly, our tower growth in these markets is primarily driven by (1) wireless service providers seeking to increase the quality and coverage of their networks, (2) increased consumer mobile data traffic, such as media streaming, mobile apps and games, web browsing, and email, and (3) incremental spectrum auctions, which have resulted in new market entrants, as well as incremental voice and data network deployments.



- International Market Expansion – We believe that we can create substantial value by expanding our site leasing services into select international markets which we believe have a high-growth wireless industry and relatively stable political and regulatory environments. We consider various factors when identifying a market for our international expansion, including:

☐ Country analysis – We consider the country’s economic and political stability, and whether the country’s general business, legal and regulatory environment is conducive to the sustainability and growth of our business.

☐ Market potential – We analyze the expected demand for wireless services, and whether a country has multiple wireless service providers who are actively seeking to invest in deploying voice and data networks, as well as spectrum auctions that have occurred or that are anticipated to occur.

Risk adjusted return criteria – We consider whether buying or building towers in a country, and providing our management and leasing services, will meet our return criteria. As part of this analysis, we consider the risk of entering into an international market (for example, the impact of foreign currency exchange rates and inflation, real estate, permitting, and taxation risks), and how our expansion meets our long-term strategic objectives for the region and our business generally.

New Build Program – We build new towers domestically and internationally. In our new build program, we construct tower structures (1) under build-to-suit arrangements or (2) in locations that are strategically chosen by us. Under build-to-suit arrangements, we build tower structures for wireless service providers at locations that they have identified. Under these arrangements, we retain ownership of the tower structure and the exclusive right to co-locate additional tenants. When we construct tower structures in locations chosen by us, we utilize our knowledge of our customers' network requirements to identify locations where we believe multiple wireless service providers need, or will need to locate antennas to meet capacity or service demands. We seek to identify attractive locations for new tower structures and complete pre-construction procedures necessary to secure the site concurrently with our leasing efforts. We generally will have at least one signed tenant lease for each new build tower structure on the day that it is completed and expect that some will have multiple tenants.

Using our Local Presence to Build Strong Relationships with Major Wireless Service Providers. Given the nature of towers as location-specific communications facilities, we believe that substantially all of what we do is done best locally. Consequently, we have a broad field organization that allows us to develop and capitalize on our experience, expertise and relationships in each of our local markets which in turn enhances our customer relationships. We seek to replicate this operating model internationally. Due to our presence in local markets, we believe we are well positioned to organically grow our site leasing business and to capture new tower build opportunities in our markets and identify and participate in site development projects across our markets.

Controlling our Underlying Land Positions. We believe that a primary component of a strong site leasing business is the ability to control the underlying land positions. Consequently, we have purchased and/or entered into perpetual easements or long-term leases for the land that underlies our tower structures and intend to continue to do so, to the extent available at commercially reasonable prices. We believe that these purchases, perpetual easements, and/or long-term leases will increase our margins, improve our cash flow from operations, and minimize our exposure to increases in ground lease rents in the future. As of December 31, 2018, approximately 71% of our tower structures were located on land that we own or control for more than 20 years and the average remaining life under our ground leases, including renewal options under our control, was 36 years. As of December 31, 2018, approximately 7.9% of our tower structures had ground leases maturing in the next 10 years.

## Industry Developments

We believe that growing wireless data traffic will require wireless service providers to continue to increase the capacity of their networks, and we believe that the continued capacity increases will require our customers to install equipment at new sites and add new equipment at existing sites. We expect that the wireless communications industry will continue to experience growth as a result of the following trends:

- Consumers are increasing their demand for wireless connectivity due to the adoption of bandwidth-intensive wireless data applications, such as video, social networking and enhanced web browsing, and the growth in machine-to-machine applications (such as connected cars). As a result, according to industry estimates, global mobile data traffic will grow at an approximately 46% compound annual growth rate from 2017 to 2022 and will grow at a rate two times faster than non-mobile data traffic over the same period.



- The velocity of spectrum development is expected to remain dynamic as carriers continue to deploy new bands and optimize bands that are currently in service, both of which activities we expect will require carriers to install equipment at new sites and add new equipment at existing sites. For example, recent spectrum auctions and a new network for first responders that is being developed by AT&T for the First Responder Network Authority (“FirstNet”), an independent authority within the Department of Commerce, are expected to contribute to growth in the upcoming years. In addition, the deployment of 5G wireless technologies is expected to increase equipment installation at existing sites.

- Consumers list network quality as a key contributor when terminating or changing service. To remain competitive and to decrease subscriber churn rates, wireless carriers have made substantial capital investments into their wireless networks to improve service quality and expand coverage. We expect wireless carriers to continue to expend capital to differentiate their product offerings.

We believe that the world-wide wireless industry will continue to grow and is reasonably well-capitalized, highly competitive and focused on quality and advanced services. Therefore, we expect that we will see a multi-year trend of additional demand for tower space from our customers, which we believe will translate into steady leasing growth for us.

## Our Businesses

## Site Leasing Services

Our primary focus is the leasing of antenna space on our multi-tenant towers to a variety of wireless service providers under long-term lease contracts in the United States, Canada, Central America, and South America. We derive site leasing revenues primarily from wireless service provider tenants. Wireless service providers enter into tenant leases with us, each of which relates to the lease or use of space at an individual site. Our site leasing business generates substantially all of our total segment operating profit, representing 98.0% or more of our total segment operating profit for the past three fiscal years. Our site leasing business is classified into two reportable segments, domestic site leasing and international site leasing.

## Domestic Site Leasing

As of December 31, 2018, we owned 16,263 sites in the United States and its territories. For the year ended December 31, 2018, we generated 80.4% of our total site leasing revenue from these sites. We derive domestic site leasing revenues primarily from AT&T, Sprint, T-Mobile, and Verizon Wireless. In the United States, our tenant leases are generally for an initial term of five to ten years with multiple 5-year renewal periods at the option of the tenant. These tenant leases typically contain specific rent escalators, which average 3-4% per year. Our ground leases in the United States are generally for an initial term of five years or more with multiple 5-year renewal periods, at our option, and provide for rent escalators which typically average 2-3% annually. As of December 31, 2018, (1) no U.S. state or territory included more than 10% of our total tower portfolio by tower count, and (2) no U.S. state or territory accounted for more than 10% of our total revenues for the year ended December 31, 2018.

## International Site Leasing

We currently operate in 12 international markets throughout Canada, Central America, and South America. Our largest international market is Brazil. As of December 31, 2018, we owned 13,315 sites in our international markets, of which 28.9% of our global sites are located in Brazil and less than 3% of our global sites are located in each of our other international markets (each country is considered a market). We continue to focus on growing our international site leasing business through the acquisition and development of towers. Since we first entered the Central and South American markets, we have built or acquired 13,016 sites as of December 31, 2018 and continue to expand in these markets to respond to growing demand. Our operations in these countries are solely in the site leasing business, and we expect to continue to expand operations through acquisitions and new builds, as well as organic lease up on our existing towers.

We derive international site leasing revenues primarily from Oi S.A., Telefonica, Claro, and TIM. In Canada, our tenant leases are generally for an initial term of five to ten years with multiple 5-year renewal periods at the option of the tenant. These tenant leases typically contain specific rent escalators, which average 3-4% per year, including the renewal option periods. Tenant leases in our Central American and South American markets typically have an initial term of ten years with multiple 5-year renewal periods. In Central America, we have similar fixed rent escalators to that of leases in the United States and Canada while our leases in South America escalate in accordance with a standard cost of living index. In certain international markets such as Brazil, tenant leases are typically governed by master lease agreements, which provide for the material terms and conditions that will govern the terms of the use of the site. Tenant leases in South America typically provide a pass-through charge for the underlying ground lease rent in addition to the base tenant rent. Our ground leases in Canada, Central America and South America generally have similar terms and



conditions as those in the United States, except that the annual escalators in our South American ground leases are based on a cost of living index. Our operations in Central America and Ecuador are primarily denominated in United States Dollars. In Brazil, Canada, and Chile, significantly all of our revenue, expenses, and capital expenditures, including tenant leases, ground leases, and other tower-related expenses are denominated in local currency. In Colombia, Argentina, and Peru, our revenue, expenses, and capital expenditures, including tenant leases, ground leases, and other tower-related expenses are denominated in a mix of local currency and U.S. dollars.

## Site Development Services

Our site development business, which is conducted in the United States only, is complementary to our site leasing business and provides us the ability to keep in close contact with the wireless service providers that generate substantially all of our site leasing revenue and to capture ancillary revenues that are generated by our site leasing activities, such as site acquisition services and the installation of antennas and other equipment at our tower locations. Site development services revenues are earned primarily from providing a full range of end to end services to wireless service providers or companies providing development or project management services to wireless service providers. Our services include: (1) network pre-design; (2) identification of potential locations for carrier equipment on new and existing towers, along with other wireless infrastructure; (3) support in leasing of the location; (4) obtaining zoning approvals and permits; (5) tower and related site construction; (6) antenna installation; and (7) radio equipment installation, commissioning, and maintenance. We provide site development services at our towers and at towers owned by others on a local basis, through market and regional offices. These market offices are responsible for all site development operations.

## Customers

We lease tower space to and perform site development services for all of the large U.S. wireless service providers. In both our site leasing and site development businesses, we work with large national providers and smaller regional, local, or private operators. Internationally, we lease tower space to all the major service providers in Canada, Central America, and South America.

We depend on a relatively small number of customers for our site leasing and site development revenues. The following customers represented at least 10% of our total revenues during the last three years:

<table><tr><td rowspan="2">Percentage of Total Revenues</td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>AT&amp;T Wireless</td><td>24.0%</td><td>25.0%</td><td>25.7%</td></tr><tr><td>Sprint</td><td>17.9%</td><td>15.1%</td><td>16.1%</td></tr><tr><td>T-Mobile</td><td>16.4%</td><td>16.5%</td><td>17.0%</td></tr><tr><td>Verizon Wireless</td><td>14.7%</td><td>15.2%</td><td>15.2%</td></tr></table>

In addition to the Big 4 wireless carriers (AT&T, T-Mobile, Sprint, and Verizon Wireless), we have also provided services or leased space to a number of customers including:

<table><tr><td>Algar Celular</td><td>Dish</td><td>Oi S.A.</td></tr><tr><td>Cable &amp; Wireless</td><td>Freedom Mobile</td><td>SouthernLinc</td></tr><tr><td>Cellular South</td><td>Harris Corp.</td><td>TIM</td></tr><tr><td>Claro</td><td>ICE</td><td>Telefonica</td></tr><tr><td>Digicel</td><td>NII Holdings</td><td>U.S. Cellular</td></tr></table>

## Sales and Marketing

Our sales and marketing goals are to:

- use existing relationships and develop new relationships with wireless service providers to lease antenna space on and sell related services with respect to our owned towers or managed properties, enabling us to grow our site leasing business; and

- successfully bid and win those site development services contracts that will contribute to our operating margins and/or provide a financial or strategic benefit to our site leasing business.

We approach sales on a company-wide basis, involving many of our employees. We have a dedicated sales force that is supplemented by members of our executive management team. Our dedicated salespeople are based regionally as well as in our corporate office. We also rely on our vice presidents, directors, and other operations personnel to sell our services and cultivate customer relationships. Our strategy is to delegate sales efforts by geographic region or to those employees of ours who have the best



relationships with our customers. Most wireless service providers have national corporate headquarters with regional and local offices. We believe that wireless service providers make most decisions for site development and site leasing services at the regional and local levels with input from their corporate headquarters. Our sales representatives work with wireless service provider representatives at the regional and local levels and at the national level when appropriate. Our sales staff's compensation is heavily weighted to incentive-based goals and measurements.

## Competition

Domestic Site Leasing – In the U.S., our primary competitors for our site leasing activities are (1) large independent tower companies including American Tower Corporation and Crown Castle International, (2) a number of regional independent tower owners, (3) wireless service providers that own and operate their own towers and lease, or may in the future decide to lease, antenna space to other providers, and (4) owners and operators of alternative facilities such as rooftops, outdoor and indoor distributed antenna system (“DAS”) networks, billboards, utility poles, and electric transmission towers.

International Site Leasing – Internationally, our competition consists of wireless service providers that own and operate their own tower networks, large multinational, national and regional independent tower companies, and alternative facilities such as rooftop, outdoor and indoor DAS networks, billboards, utility poles, and electric transmission towers. We believe that tower location and capacity, quality of service, density within a geographic market and, to a lesser extent, price historically have been and will continue to be the most significant competitive factors affecting the domestic and international site leasing business.

Site Development – The site development business is competitive and price sensitive. We believe that the majority of our competitors in the U.S. site development business operate within local region and market areas, while some firms offer their services nationally. The market includes participants from a variety of market segments offering individual, or combinations of, competing services. The field of competitors includes site development companies, zoning consultants, real estate firms, wireless construction companies, tower owners, telecommunications equipment vendors, which provide end-to-end site development services through multiple subcontractors, and wireless service providers' internal staff. We believe that providers base their decisions for site development services on a number of criteria, including company experience, price, track record, local reputation, geographic reach, and time for completion of a project.

## Employees

Our corporate offices are located in our headquarters in Boca Raton, Florida. We also have employees located in our international, regional, and local offices. As of December 31, 2018, we had 1,347 employees of which 357 were based outside of the U.S. and its territories. We consider our employee relations to be good.

## Regulatory and Environmental Matters

Federal Regulations. In the U.S., which accounted for 80.4% of our total site leasing revenue for the year ended December 31, 2018, both the Federal Communications Commission (the "FCC") and the Federal Aviation Administration (the "FAA") regulate towers. Many FAA requirements are implemented in FCC regulations. These regulations govern the construction, lighting, and painting or other marking of towers, as well as the maintenance, inspection, and record keeping related to towers, and may, depending on the characteristics of particular towers, require prior approval and registration of towers before they may be constructed, altered or used. Wireless communications equipment and radio or television stations operating on towers are separately regulated and may require independent customer licensing depending upon the particular frequency or frequency band used. In addition, any applicant for an FCC tower structure registration (through the FCC's Antenna Structure Registration System) must certify that, consistent with the Anti-Drug Abuse Act of 1988, neither the applicant nor its principals are subject to a denial of federal benefits because of a conviction for the possession or distribution of a controlled substance. New tower construction also requires approval from the state or local governing authority for the proposed site; compliance with the National Environmental Policy Act ("NEPA"); compliance with the National Historic Preservation Act ("NHPA"); compliance with the Endangered Species Act ("ESA"); and may require notification to the FAA.

Pursuant to the requirements of the Communications Act of 1934, as amended, the FCC, in conjunction with the FAA, has developed standards to consider proposals involving new or modified towers. These standards mandate that the FCC and the FAA consider the height of the proposed tower, the relationship of the tower to existing natural or man-made obstructions, and the proximity of the tower to runways and airports. Proposals to construct or to modify existing towers above certain heights must be reviewed by the FAA to ensure the structure will not present a hazard to air navigation. The FAA may condition its issuance of a no-hazard determination upon compliance with specified lighting and/or painting requirements. Towers that meet certain height and location criteria must also be registered with the FCC. A tower that requires FAA clearance will not be registered by the FCC until it



is cleared by the FAA. Upon registration, the FCC may also require special lighting and/or painting. Owners of wireless communications towers may have an obligation to maintain painting and lighting or other marking in conformance with FAA and FCC regulations. Tower owners and licensees that operate on those towers also bear the responsibility of monitoring any lighting systems and notifying the FAA of any lighting outage or malfunction.

Owners and operators of towers may be subject to, and therefore must comply with, environmental laws, including NEPA, NHPA and ESA. Any licensed radio facility on a tower is subject to environmental review pursuant to the NEPA, among other statutes, which requires federal agencies to evaluate the environmental impact of their decisions under certain circumstances. The FCC has issued regulations implementing the NEPA. These regulations place responsibility on applicants to investigate potential environmental effects of their operations and to disclose any potential significant effects on the environment in an environmental assessment prior to constructing or modifying a tower and prior to commencing certain operations of wireless communications or radio or television stations from the tower. In the event the FCC determines the proposed structure or operation would have a significant environmental impact based on the standards the FCC has developed, the FCC would be required to prepare an environmental impact statement, which will be subject to public comment. This process could significantly delay the registration of a particular tower.

We generally indemnify our customers against any failure to comply with applicable regulatory standards relating to the construction, modification, or placement of towers. Failure to comply with the applicable requirements may lead to civil penalties.

The Telecommunications Act of 1996 amended the Communications Act of 1934 by preserving state and local zoning authorities’ jurisdiction over the construction, modification, and placement of towers. The law, however, limits local zoning authority by prohibiting any action that would discriminate among different providers of personal wireless services or ban altogether the construction, modification or placement of radio communication towers. Finally, the Telecommunications Act of 1996 requires the federal government to help licensees for wireless communications services gain access to preferred sites for their facilities. This may require that federal agencies and departments work directly with licensees to make federal property available for tower facilities.

As an owner and operator of real property, we are subject to certain environmental laws that impose strict, joint and several liability for the cleanup of on-site or off-site contamination and related personal injury or property damage. We are also subject to certain environmental laws that govern tower placement and may require pre-construction environmental studies. Operators of towers must also take into consideration certain radio frequency (“RF”) emissions regulations that impose a variety of procedural and operating requirements. Certain proposals to operate wireless communications and radio or television stations from tower structures are also reviewed by the FCC to ensure compliance with requirements relating to human exposure to RF emissions. Exposure to high levels of RF energy can produce negative health effects. The potential connection between low-level RF energy and certain negative health effects, including some forms of cancer, has been the subject of substantial study by the scientific community in recent years. We believe that we are in substantial compliance with and we have no material liability under any applicable environmental laws. These costs of compliance with existing or future environmental laws and liability related thereto may have a material adverse effect on our prospects, financial condition or results of operations.

State and Local Regulations. Most states regulate certain aspects of real estate acquisition, leasing activities, and construction activities. Where required, we conduct the site acquisition portions of our site development services business through licensed real estate brokers' agents, who may be our employees or hired as independent contractors, and conduct the construction portions of our site development services through licensed contractors, who may be our employees or independent contractors. Local regulations include city and other local ordinances, zoning restrictions and restrictive covenants imposed by community developers. These regulations vary greatly from jurisdiction to jurisdiction, but typically require tower owners to obtain approval from local officials or community standards organizations, or certain other entities prior to tower construction and establish regulations regarding maintenance and removal of towers. FCC rules establish presumptively reasonable time periods for state and local authorities to act on applications to collocate a facility or deploy a facility, such as a tower. In addition, many local zoning authorities require tower owners to post bonds or cash collateral to secure their removal obligations. Local zoning authorities generally have been unreceptive to construction of new towers in their communities because of the height and visibility of the towers, and have, in some instances, instituted moratoria. However, in August 2018, the FCC issued a declaratory ruling stating that express and de facto moratoria on deployment of telecommunications facilities violate the Communications Act. Although this FCC ruling is currently the subject of petitions for reconsideration before the FCC and petitions for review before a federal appellate court, it remains in effect.

International Regulations. Regulatory regimes outside of the U.S. and its territories vary by country and locality; however, these regulations typically require tower owners and/or licensees to obtain approval from local officials or government agencies prior to tower construction or modification or the addition of a new antenna to an existing tower. Additionally, some regulations include ongoing obligations regarding painting, lighting, and maintenance. Our international operations may also be subject to limitations on foreign ownership of land in certain areas. Based on our experience to date, these regimes have been similar to, but not more rigorous,



burdensome or comprehensive than, those in the U.S. Non-compliance with such regulations may lead to monetary penalties or deconstruction orders. Our international operations are also subject to various regulations and guidelines regarding employee relations and other occupational health and safety matters. As we expand our operations into additional international geographic areas, we will be subject to regulations in these jurisdictions.

## Backlog

Backlog related to our site leasing business consists of lease agreements and amendments, which have been signed, but have not yet commenced. As of December 31, 2018, we had 820 new leases and amendments which had been executed with customers but which had not begun generating revenue. These leases and amendments will contractually provide for approximately $15.7 million of annual revenue. By comparison, as of December 31, 2017, we had 1,205 new leases and amendments which had been executed with customers but which had not begun generating revenue. These leases and amendments contractually provided for approximately $9.2 million of annual revenue.

Our backlog for site development services consists of the value of work that has not yet been completed under executed contracts. As of December 31, 2018, we had approximately $76.1 million of contractually committed revenue as compared to approximately $47.5 million as of December 31, 2017.

## Availability of Reports and Other Information

SBA Communications Corporation was incorporated in the State of Florida in March 1997 and began operating in compliance with real estate investment trust (“REIT”) requirements for federal income tax purposes effective January 1, 2016. Our corporate website is www.sbasite.com. We make available, free of charge, access to our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, Proxy Statement on Schedule 14A and amendments to those materials filed or furnished pursuant to Section 13(a) or 15(d) of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), on our website under “Investor Relations – Reports and Results – SEC Filings,” as soon as reasonably practicable after we file electronically such material with, or furnish it to, the United States Securities and Exchange Commission (the “Commission”).

## ITEM 1A. RISK FACTORS

## Risks Related to Our Business

If our wireless service provider customers combine their operations to a significant degree, our future operating results, ability to service our indebtedness, and stock price could be adversely affected.

Significant consolidation among our wireless service provider customers may result in our customers failing to renew existing leases for tower space or reducing future capital expenditures in the aggregate because their existing networks and expansion plans may overlap or be very similar, or acquired technologies may be discontinued. AT&T, Verizon and Sprint have grown through acquisitions of other wireless service providers. As a result, the combined companies have rationalized duplicative parts of their networks, and, in the case of Sprint, the Nextel iDEN network was discontinued. These consolidations have led and may continue to lead to non-renewal of certain of our tower leases. In addition, in April 2018, T-Mobile and Sprint entered into a definitive agreement to merge, subject to regulatory approval and other closing conditions. If this potential transaction closes, it may lead to the non-renewal of certain leases as a result of the rationalization of duplicative or overlapping parts of their networks. As of December 31, 2018, T-Mobile and Sprint represented approximately 16.4% and 15.8% of our total site leasing revenue, respectively. The revenue generated from each of T-Mobile and Sprint on overlapping sites represented less than 6.5% of our total site leasing revenue for the year ended December 31, 2018, excluding, and incremental to, the impact from previously disclosed expected consolidation churn from T-Mobile’s MetroPCS and Sprint’s Clearwire networks. In addition, these overlapping sites have an average remaining current term of approximately 3.6 years and 4.9 years with T-Mobile and Sprint, respectively.

If our wireless service provider customers continue to consolidate as a result of, among other factors, limited wireless spectrum for commercial use in the U.S., these consolidations could significantly impact the number of tower leases that are not renewed or the number of new leases that our wireless service provider customers require to expand their networks, which could materially and adversely affect our future operating results and our ability to service our indebtedness. These risks could be exacerbated due to changes in governmental policy that may favor industry consolidation. In addition, our customers may decide not to renew certain tower leases on towers that do not have duplicative or overlapping antennas, which could further impact our operating results.



Consolidation may also occur among wireless service provider customers in our international markets. For example, in January 2019, Claro acquired Telefonica’s assets in Guatemala and El Salvador, two markets in which we own towers. Consolidations in our international markets may also lead to non-renewal of certain of our tower leases, which could adversely affect our operating results.

In addition, the market price of our Class A common stock may be affected by the economic and market perception of the announcement or consummation of wireless service provider customer consolidations and their impact on our future operating results.

We depend on a relatively small number of customers for most of our revenue, and the loss, consolidation or financial instability of any of our significant customers may materially decrease our revenue and adversely affect our financial condition.

We derive a significant portion of our revenue from a small number of customers. Consequently, a reduction in demand for site leasing, reduced future capital expenditures on the networks, or the loss, as a result of bankruptcy, merger with other customers of ours or otherwise, of any of our largest customers could materially decrease our revenue and have an adverse effect on our growth.

The following is a list of significant customers (representing at least 10% of revenue in any of the last three years) and the percentage of our total revenues for the specified time periods derived from these customers:

<table><tr><td rowspan="2">Percentage of Total Revenues</td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>AT&amp;T Wireless</td><td>24.0%</td><td>25.0%</td><td>25.7%</td></tr><tr><td>Sprint</td><td>17.9%</td><td>15.1%</td><td>16.1%</td></tr><tr><td>T-Mobile</td><td>16.4%</td><td>16.5%</td><td>17.0%</td></tr><tr><td>Verizon Wireless</td><td>14.7%</td><td>15.2%</td><td>15.2%</td></tr></table>

We also have client concentrations with respect to revenues in each of our financial reporting segments:

<table><tr><td rowspan="2">Percentage of Domestic Site Leasing Revenue</td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>AT&amp;T Wireless</td><td>31.9%</td><td>32.7%</td><td>32.7%</td></tr><tr><td>T-Mobile</td><td>20.3%</td><td>19.7%</td><td>19.6%</td></tr><tr><td>Sprint</td><td>19.6%</td><td>18.9%</td><td>19.8%</td></tr><tr><td>Verizon Wireless</td><td>19.0%</td><td>19.0%</td><td>18.2%</td></tr></table>

<table><tr><td rowspan="2">Percentage of International Site Leasing Revenue</td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>Oi S.A.</td><td>35.5%</td><td>42.2%</td><td>43.9%</td></tr><tr><td>Telefonica</td><td>26.7%</td><td>25.7%</td><td>26.4%</td></tr><tr><td>Claro</td><td>11.4%</td><td>10.0%</td><td>9.4%</td></tr></table>

<table><tr><td rowspan="2">Percentage of Site Development Revenue</td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>Sprint</td><td>47.1%</td><td>12.9%</td><td>11.7%</td></tr><tr><td>T-Mobile</td><td>16.4%</td><td>26.9%</td><td>28.4%</td></tr><tr><td>Verizon Wireless</td><td>6.4%</td><td>12.8%</td><td>16.5%</td></tr><tr><td>Nokia, Inc.</td><td>3.2%</td><td>10.1%</td><td>7.1%</td></tr></table>

We derive revenue through numerous site leasing contracts and site development contracts. In the United States and Canada, each site leasing contract relates to the lease of space at an individual tower and is generally for an initial term of five to ten years with multiple 5-year renewal periods at the option of the tenant. Site leasing contracts in our Central American and South American markets typically have an initial term of ten years with multiple 5-year renewal periods. However, if any of our significant site leasing



customers were to experience financial difficulty, substantially reduce their capital expenditures or reduce their dependence on leased tower space and fail to renew their leases with us, our revenues, future revenue growth and results of operations would be adversely affected. In addition, many of our tenants in our international markets are subsidiaries of global telecommunications companies. These subsidiaries may not have the explicit or implied financial support of their parent entities, which may impact their creditworthiness. For example, in January 2018, Oi, S.A. (“Oi”), our largest customer in Brazil, emerged from bankruptcy with a reorganization plan and is expected to resolve all of its pre-petition obligations. However, if Oi is unable to successfully fulfill its reorganization obligations or cannot operate its business on a go-forward basis, it could adversely affect our future results of operations.

Our site development customers engage us on a project-by-project basis, and a customer can generally terminate an assignment at any time without penalty. In addition, a customer’s need for site development services can decrease, and we may not be successful in establishing relationships with new customers. Furthermore, our existing customers may not continue to engage us for additional projects.

We have a substantial level of indebtedness which may have an adverse effect on our business or limit our ability to take advantage of business, strategic or financing opportunities.

As indicated below, we have and will continue to have a significant amount of indebtedness relative to our deficit. The following table sets forth our total principal amount of debt and shareholders' deficit as of December 31, 2018 and 2017.

<table><tr><td rowspan="2"></td><td colspan="3">As of December 31,</td></tr><tr><td>2018</td><td>2017</td><td></td></tr><tr><td></td><td colspan="3">(in thousands)</td></tr><tr><td>Total principal amount of indebtedness</td><td>$ 10,028,000</td><td>$ 9,405,000</td><td></td></tr><tr><td>Shareholders&#x27; deficit</td><td>$ (3,376,823)</td><td>$ (2,599,114)</td><td></td></tr></table>

Our substantial level of indebtedness increases the possibility that we may be unable to generate cash sufficient to pay the principal, interest, or other amounts due on our indebtedness. Subject to certain restrictions under our existing indebtedness, we and our subsidiaries may also incur significant additional indebtedness in the future, some of which may be secured debt. This may have the effect of increasing our total leverage. For example, on March 9, 2018, we, through a New York common law trust, issued $640.0 million in Tower Securities, and on April 11, 2018, we secured a new $2.4 billion term loan, which contributed to the net $623.0 million increase of our total indebtedness during 2018.

As a consequence of our indebtedness, (1) demands on our cash resources may increase, (2) we are subject to restrictive covenants that further limit our financial and operating flexibility and (3) we may choose to institute self-imposed limits on our indebtedness based on certain considerations including market interest rates, our relative leverage and our strategic plans. For example, as a result of our substantial level of indebtedness and the uncertainties arising in the credit markets and the U.S. economy:

• we may be more vulnerable to general adverse economic and industry conditions;

• we may have to pay higher interest rates upon refinancing or on our variable rate indebtedness if interest rates rise, thereby reducing our cash flows;

• we may find it more difficult to obtain additional financing to fund future working capital, capital expenditures and other general corporate requirements that would be in our best long-term interests;

• we may be required to dedicate a substantial portion of our cash flow from operations to the payment of principal and interest on our debt, reducing the available cash flow to fund other investments, including share repurchases, tower acquisition and new build capital expenditures, or to satisfy our REIT distribution requirements;

• we may have limited flexibility in planning for, or reacting to, changes in our business or in the industry;

• we may have a competitive disadvantage relative to other companies in our industry that are less leveraged; and

• we may be required to sell debt or equity securities or sell some of our core assets, possibly on unfavorable terms, in order to meet payment obligations.

Our variable rate indebtedness and refinancing obligations subject us to interest rate risk, which could cause our debt service obligations to increase significantly.

Fluctuations in market interest rates or changes in central bank monetary policy may increase interest expense relating to our floating rate indebtedness, which we expect to incur pursuant to our Revolving Credit Facility and Term Loan, and may make it difficult to refinance our existing indebtedness at a commercially reasonable rate or at all. There is no guarantee that the future



refinancing of our indebtedness will have fixed interest rates or that interest rates on such indebtedness will be equal to or lower than the rates on our current indebtedness.

An increase in market interest rates would increase our interest expense arising on our existing and future floating rate indebtedness or upon refinancing of our fixed rate debt. Pursuant to the terms of our Credit Agreement, the interest rate that we pay on indebtedness incurred under the Revolving Credit Facility or Term Loans varies based on a fixed margin over either a base rate or a Eurodollar rate which references the LIBOR rate. As of December 31, 2018, this represented approximately $2.7 billion, or 27.1% of our total indebtedness. As a result, we are exposed to interest rate risk. Interest rates, including LIBOR, have recently increased and may increase in future periods. If interest rates continue to increase, our debt service obligations on the variable rate indebtedness will increase even though the amount borrowed remained the same, and our net income and cash flows, including cash available for servicing our indebtedness, will correspondingly decrease. In addition, LIBOR is the subject of recent proposals for reform, which may cause LIBOR to disappear entirely or perform differently than in the past. The consequences of these developments cannot be predicted, but could result in an increase in the cost of our variable rate debt.

Furthermore, in an environment of increasing interest rates, it is likely that any future refinancing of our indebtedness will be either at fixed interest rates higher than our current fixed interest rates or at variable rates. We have and may continue to enter into interest rate swaps that involve the exchange of floating for fixed rate interest payments in order to reduce interest rate volatility. For example, on February 1, 2019, we, through our wholly owned subsidiary, SBA Senior Finance II, LLC, entered into a four-year interest rate swap on a portion of our 2018 Term Loan. We swapped $1.2 billion of notional value accruing interest at one month LIBOR plus 200 basis points for a fixed rate of 4.495% per annum. However, we may not maintain interest rate swaps with respect to all of our variable rate indebtedness, and any swaps we enter into may not fully mitigate our interest rate risk.

Increasing competition in the tower industry may create pricing pressures or result in non-renewals that may materially and adversely affect us.

Our industry is highly competitive, and our wireless service provider customers sometimes have alternatives for leasing antenna space. However, we believe that tower location and capacity, quality of service, density within a geographic market and, to a lesser extent, price historically have been and will continue to be the most significant competitive factors affecting the site leasing business. However, competitive pricing pressures for tenants on towers from competitors could materially and adversely affect our lease rates. In addition, the increasing number of towers (1) may provide customers the ability to relocate their antennas to other towers if they determine that a more suitable, efficient or economical location exists, which could lead to non-renewal of existing leases, or (2) may adversely impact our ability to enter into new customer leases. This impact may be exacerbated if competitors construct towers near our existing towers. Any of these factors could materially and adversely affect our growth rate and our future operations.

In the site leasing business, we compete with:

- wireless service providers that own and operate their own towers and lease, or may in the future decide to lease, antenna space to other providers;

• national and regional tower companies who may be substantially larger and have greater financial resources than we do;

• international tower companies who have been in the international market for a longer period of time than we have; and

• alternative facilities such as rooftops, outdoor and indoor DAS networks, billboards and electric transmission towers.

The site development segment of our industry is also competitive. There are numerous large and small companies that offer one or more of the services offered by our site development business. As a result of this competition, margins in this segment may come under pressure. Many of our competitors have lower overhead expenses and therefore may be able to provide services at prices that we consider unprofitable. If margins in this segment were to decrease, our consolidated revenues and our site development segment operating profit could be adversely affected.

Increasing competition may negatively impact our ability to grow our communication site portfolio long term.

We intend to continue growing our tower portfolio, domestically and internationally, through acquisitions and new builds. Our ability to meet our growth targets significantly depends on our ability to build or acquire existing towers that meet our investment requirements. Traditionally, our acquisition strategy has focused on acquiring towers from smaller tower companies, independent tower developers and wireless service providers. However, as a result of consolidation in the tower industry, there are fewer of these mid-sized tower transactions available in the U.S. and there is more competition to acquire existing towers. Increased competition for acquisitions may result in fewer acquisition opportunities for us, higher acquisition prices, and increased difficulty in negotiating and consummating agreements to acquire such towers. For example, in 2018, we passed on more U.S. acquisitions than we did in 2017 due to asset quality, price, or lease terms. Furthermore, to the extent that the tower acquisition opportunities are for significant tower portfolios, some of our competitors are significantly larger and have greater financial resources than we do. Finally, laws regulating



competition, domestically and internationally, may limit our ability to acquire certain portfolios. As a result of these risks, the cost of acquiring these towers may be higher than we expect or we may not be able to meet our annual and long-term tower portfolio growth targets. If we are not able to successfully address these challenges, we may not be able to materially increase our tower portfolio in the long-term through acquisitions.

Our ability to build new towers is dependent upon the availability of sufficient capital to fund construction, our ability to locate, and acquire at commercially reasonable prices, attractive locations for such towers and our ability to obtain the necessary zoning and permits. Local regulations, including municipal or local ordinances, zoning restrictions and restrictive covenants imposed by community developers, vary greatly, but typically require antenna tower and structure owners to obtain approval from local officials or community standards organizations prior to tower or structure construction or modification. With respect to our international new builds, our tower construction may be delayed or halted as a result of local zoning restrictions, inconsistencies between laws or other barriers to construction in international markets. Due to these risks, it may take longer to complete our new tower builds than anticipated, domestically and internationally, and the costs of constructing these towers may be higher than we expect or we may not be able to add as many towers as we had planned in 2019. If we are not able to increase our new build tower portfolio as anticipated, it could negatively impact our ability to achieve our financial goals.

Our international operations are subject to economic, political and other risks that could materially and adversely affect our revenues or financial position.

Our current business operations in developing markets, and our expansion into any other international markets in the future, could result in adverse financial consequences and operational problems not typically experienced in the United States. The consolidated revenues generated by our international operations were approximately 18.2% during the year ended December 31, 2018, and we anticipate that our revenues from our international operations will continue to grow in the future. Accordingly, our business is and will in the future be subject to risks associated with doing business internationally, including:

- laws and regulations that dictate how we operate our towers and conduct business, including zoning, maintenance and environmental matters, and laws related to ownership of real property;

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

• laws affecting telecommunications infrastructure including the sharing of such infrastructure;

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

- changes to existing or new domestic or international tax laws, new or significantly increased municipal fees directed specifically at the ownership and operation of towers, which may be applied and enforced retroactively and could materially affect the profitability of our operations;

• expropriation and governmental regulation restricting foreign ownership or requiring reversion or divestiture;

• restriction or revocation of spectrum licenses;

- laws and regulations governing our employee relations, including occupational health and safety matters and employee compensation and benefits matters;

- our ability to comply with, and the costs of compliance with, anti-bribery laws such as the Foreign Corrupt Practices Act and similar local anti-bribery laws;

- uncertainties regarding legal or judicial systems, including inconsistencies between and within laws, regulations and decrees, and judicial application thereof, and delays in the judicial process;

• challenges arising from less-developed infrastructure in certain markets; and

• difficulty in recruiting and retaining trained personnel.

We are also exposed to risks operating in countries with high levels of inflation, including the risk that inflation rates exceed our fixed escalator percentages in markets where our leases include fixed escalators and the risk that adverse economic conditions may discourage growth in consumer demand and consequently reduce our customers' demand for our site leasing services. For example, we have a subsidiary in Argentina through which we operate our site leasing business. The Argentinean economy was deemed to be "highly inflationary" from a U.S. GAAP perspective as of the second quarter of 2018. As a result, we remeasured the financial statements for those operations to the U.S. dollar as of July 1, 2018. Although this change did not have a material impact on our financial statements as our assets in and revenue from Argentina were each less than 1% of consolidated assets and revenue, respectively, as of December 31, 2018, going forward, fluctuations in the Argentinean Peso to U.S. dollar exchange rate could negatively impact our financial results.

## Currency fluctuations may negatively affect our results of operations.

Our operations in Central America and Ecuador are primarily denominated in U.S. Dollars. In Brazil, Canada, and Chile, significantly all of our revenue, expenses, and capital expenditures, including tenant leases, ground leases, and other tower-related



expenses are denominated in local currency. In Colombia, Argentina, and Peru, our revenue, expenses, and capital expenditures, including tenant leases, ground leases, and other tower-related expenses are denominated in a mix of local currency and U.S. dollars. Our foreign currency denominated revenues and expenses are translated into U.S. dollars at average exchange rates for inclusion in our consolidated financial statements.

For the year ended December 31, 2018, approximately 19.3% of our total cash site leasing revenue was generated by our international operations, of which 13.9% was generated in non-U.S. dollar currencies, including 12.5% which was denominated in Brazilian Reais. The exchange rates between our foreign currencies and the U.S. Dollar have fluctuated significantly in recent years and may continue to do so in the future. For example, the Brazilian Real has historically been subject to substantial volatility and weakened 12.0% when comparing the average rate for the years ended December 31, 2018 and 2017. This trend has affected, and may in the future continue to affect, our reported results of operations.

Changes in exchange rates between these local currencies and the U.S. dollar will affect the recorded levels of site leasing revenue, segment operating profit, assets and/or liabilities. Volatility in foreign currency exchange rates can also affect our ability to plan, forecast and budget for our international operations and expansion efforts.

Furthermore, we have intercompany loan agreements which permit one of our Brazilian entities to borrow amounts up to $1,250 million in U.S. Dollars. As of December 31, 2018, the aggregate outstanding balance under these agreements was $536.9 million. In accordance with ASC 830, we remeasure foreign denominated intercompany loans with the corresponding change in the balance being recorded in Other income (expense), net in our Consolidated Statements of Operations as settlement is anticipated or planned in the foreseeable future. Consequently, if the U.S. Dollar strengthens against the Brazilian Real, our results of operations would be adversely affected. For the years ended December 31, 2018 and 2017, we recorded an $89.1 million loss and an $8.8 million loss, respectively, on the remeasurement of the intercompany loan due to changes in foreign currency exchange rates.

New technologies or network architecture or changes in a customer’s business model may reduce demand for our wireless infrastructure or negatively impact our revenues.

Improvements or changes in the efficiency, architecture, and design of wireless networks or changes in a wireless service provider customer’s business model may reduce the demand for our wireless infrastructure. In addition, as customers deploy increased capital to the development and implementation of new technologies, they may allocate less of their budgets to lease space on our towers. For example, new technologies that may promote network sharing, joint development, or resale agreements by our wireless service provider customers, such as signal combining technologies or network functions virtualization, may reduce the need for our wireless infrastructure, or may result in the decommissioning of equipment on certain sites because portions of the customers’ networks may become redundant. In addition, other technologies and architectures, such as WiFi, DAS, femtocells, other small cells, or satellite (such as low earth orbiting) and mesh transmission systems may, in the future, serve as substitutes for, or alternatives to, the traditional macro site communications architecture that is the basis of substantially all of our site leasing business. The majority of our tower portfolio is comprised of traditional macro sites, and therefore is not as diversified into non-macro sites and other technologies and architectures as some of our competitors. In addition, new technologies that enhance the range, efficiency, and capacity of wireless equipment could reduce demand for our wireless infrastructure. Further, a customer may decide to no longer outsource wireless infrastructure or otherwise change its business model. Any significant reduction in demand for our wireless infrastructure resulting from new technologies or new architectures or changes in a customer’s business model may negatively impact our revenues or otherwise have a material adverse effect on us. Any such event may have a disproportionate impact on our business as compared to our competitors whose portfolios may be more technologically and architecturally diversified than ours.

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 the land under our tower structures consist primarily of leasehold and sub-leasehold interests, fee interests, easements, licenses, rights-of-way, and other similar interests. From time to time, we experience disputes with landowners regarding the terms of the agreements for the land under our tower structures, which can affect our ability to access and operate such towers. Further, landowners may not want to renew their 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 and our competitors, which could affect our ability to renew agreements on commercially viable terms or at all. In addition, the land underlying the 2,113 towers we acquired in 2013 from Oi, one of Brazil’s largest telecommunications providers, is subject to a concession from the Federal Republic of Brazil that expires in 2025. At the end of the term, the Brazilian government will have the right to (1) renew the concession upon newly negotiated terms or (2) terminate the concession and take possession of the land and the tower on such land. Although Oi has entered into a non-terminable lease with us for 35 years, if the concession is not renewed, our site leasing revenue from co-located tenants would terminate prior to the end of such lease. For the year ended December 31, 2018, we generated 10.0% of our total international site leasing revenue from these 2,113 towers of which 6.4% related to Oi and 3.6% represented revenue from co-located tenants.



As of December 31, 2018, the average remaining life under our ground leases, including renewal options under our control, was approximately 36 years, and approximately 7.9% of our tower structures have ground leases maturing in the next 10 years. Failure 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.

A slowdown in demand for wireless communications services or delays or changes in the deployment or adoption of new technologies could materially and adversely affect our future growth and revenues, and we cannot control that demand.

Additional revenue growth on our towers other than through contractual escalators comes directly from additional investment by our wireless service provider customers in their networks. If consumers significantly reduce their minutes of use or data usage, or fail to widely adopt and use wireless data applications or new technologies, our wireless service provider customers could experience a decrease in demand for their services. In addition, delays or changes in the deployment of new technologies could further slow additional investment by our customers in their networks. There can be no assurance that 3G, 4G, including long-term evolution, advanced wireless service in certain bands, or other newer wireless technologies such as 5G will be deployed or adopted as rapidly as projected or implemented in the manner anticipated. The deployment of 3G in the United States experienced delays from the original projected timelines of the wireless and broadcast industries, the deployment of 4G in the United States has experienced delays and continued deployment of 4G in emerging markets could experience delays, and the deployment of 5G may experience similar delays. The demand by consumers and the adoption rate of consumers for these new technologies once deployed may be lower or slower than anticipated, particularly in certain of our international markets. Regardless of consumer demand, each wireless service provider must have substantial capital resources and capabilities to build out their wireless networks, including licenses for spectrum. In addition, our wireless service customers have engaged in increased use of network sharing, roaming or resale arrangements. As a result of all of the above, wireless service providers may scale back their business plans or otherwise reduce their spending, which could materially and adversely affect demand for our tower space and our wireless communications services business. These factors could also have a material adverse effect on our growth rate since growth opportunities and demand for our tower space as a result of new technologies may not be realized at the times or to the extent anticipated. Any of these factors could have a material adverse effect on our business, results of operations and financial condition.

## We may not be able to fully recognize the anticipated benefits of towers that we acquire.

A key element of our growth strategy is to increase our tower portfolio through acquisitions. We are subject to a number of risks and uncertainties as a result of those acquisition activities. These activities may fail to achieve the benefits we expected from the acquisition or the acquired assets may not meet our internal guidelines for current and future returns, particularly if we are required to place greater reliance on the financial and operational representations and warranties of the sellers in individually material acquisitions. The impact of these risks is further enhanced in acquisitions of towers in international markets, where it may be more challenging to analyze and verify all relevant information with respect to the assets being acquired. These risks could adversely affect our revenues and results of operations.

In addition, acquisitions which would be material in the aggregate may exacerbate the risks inherent with our growth strategy, such as (1) an adverse financial impact if the acquired towers do not achieve the projected financial results, (2) the impact of unanticipated costs associated with the acquisitions on our results of operations, (3) increased demands on our cash resources that may impact our ability to explore other opportunities, (4) undisclosed and assumed liabilities that we may be unable to recover, (5) an adverse impact on our existing customer relationships, (6) additional expenses and exposure to new regulatory, political and economic risks, and (7) diversion of managerial attention.

The process of integrating any acquired towers into our operations is also subject to a number of risks and financial impacts, including unforeseen operating difficulties, large expenditures, diversion of management attention, the loss of key customers and/or personnel, our inability to retain or timely find suitable replacements for key employees and management needed to operate the acquired business, and exposure to unanticipated liabilities. These risks may be exacerbated in acquisitions of a material number of towers. There can be no assurance that we will be successful in integrating domestic and international acquisitions into our existing business.

The documents governing our indebtedness contain restrictive covenants that could adversely affect our business by limiting our flexibility.

The indentures governing the 2014 Senior Notes, the 2016 Senior Notes, and the 2017 Senior Notes, the Senior Credit Agreement, and the agreement for the mortgage loan underlying the Tower Securities contain restrictive covenants imposing



significant operational and financial restrictions on us, including restrictions that may limit our ability to engage in acts that may be in our long-term best interests. Among other things, the covenants under each instrument limit our ability to:

• merge, consolidate or sell assets;

• make restricted payments, including pay dividends or make other distributions;

• enter into transactions with affiliates;

• enter into sale and leaseback transactions; and

• issue guarantees of indebtedness.

We are required to maintain certain financial ratios under the Senior Credit Agreement. The Senior Credit Agreement, as amended, requires SBA Senior Finance II to maintain specific financial ratios, including (1) a ratio of Consolidated Net Debt to Annualized Borrower EBITDA not to exceed 6.5 times for any fiscal quarter, (2) a ratio of Consolidated Net Debt and Net Hedge Exposure (calculated in accordance with the Senior Credit Agreement) to Annualized Borrower EBITDA for the most recently ended fiscal quarter not to exceed 6.5 times for 30 consecutive days and (3) a ratio of Annualized Borrower EBITDA to Annualized Cash Interest Expense (calculated in accordance with the Senior Credit Agreement) of not less than 2.0 times for any fiscal quarter.

Additionally, the mortgage loan relating to our Tower Securities contains financial covenants that require that the borrowers maintain, on a consolidated basis, a minimum debt service coverage ratio. To the extent that the debt service coverage ratio, as of the end of any calendar quarter, falls to 1.30 times or lower, then all cash flow in excess of amounts required to make debt service payments, to fund required reserves, to pay management fees and budgeted operating expenses and to make other payments required under the loan documents, referred to as “excess cash flow,” will be deposited into a reserve account instead of being released to the borrowers. The funds in the reserve account will not be released to the borrowers unless the debt service coverage ratio exceeds 1.30 times for two consecutive calendar quarters. If the debt service coverage ratio falls below 1.15 times as of the end of any calendar quarter, then an “amortization period” will commence and all funds on deposit in the reserve account will be applied to prepay the mortgage loan until such time that the debt service coverage ratio exceeds 1.15 times for a calendar quarter.

These covenants could place us at a disadvantage compared to some of our competitors which may have fewer restrictive covenants and may not be required to operate under these restrictions. Further, these covenants could have an adverse effect on our business by limiting our ability to take advantage of financing, new tower development, merger and acquisitions or other opportunities. If we fail to comply with these covenants, it could result in an event of default under our debt instruments. If any default occurs, all amounts outstanding under our outstanding notes and the Senior Credit Agreement may become immediately due and payable.

## Our dependence on our subsidiaries for cash flow may negatively affect our business.

We are a holding company with no business operations of our own. Our only significant assets are, and are expected to be, the outstanding capital stock and membership interests of our subsidiaries. We conduct, and expect to continue conducting, all of our business operations through our subsidiaries. Accordingly, our ability to pay our obligations is dependent upon dividends and other distributions from our subsidiaries to us. Most of our indebtedness is owed directly by our subsidiaries, including the mortgage loan underlying the Tower Securities, the Term Loans and any amounts that we may borrow under the Revolving Credit Facility. Consequently, the first use of any cash flow from operations generated by such subsidiaries will be payments of interest and principal, if any, under their respective indebtedness. Other than the cash required to repay amounts due under our 2014 Senior Notes, 2016 Senior Notes, and 2017 Senior Notes and funds to be utilized for stock repurchases, we currently expect that substantially all the earnings and cash flow of our subsidiaries will be retained and used by them in their operations, including servicing their respective debt obligations. The ability of our operating subsidiaries to pay dividends or transfer assets to us is restricted by applicable state law and contractual restrictions, including the terms of their outstanding debt instruments.

The loss of the services of certain of our key personnel or a significant number of our employees may negatively affect our business.

Our success depends to a significant extent upon performance and active participation of our key personnel. We cannot guarantee that we will be successful in retaining the services of these key personnel. Although we have employment agreements with Jeffrey A. Stoops, our President and Chief Executive Officer, Kurt L. Bagwell, our Executive Vice President and President—International, Thomas P. Hunt, our Executive Vice President, Chief Administrative Officer and General Counsel, and Brendan T. Cavanagh, our Executive Vice President and Chief Financial Officer, these agreements do not ensure that those members will continue with us in their current capacity for any particular period of time. We do not have employment agreements with any of our other key personnel. If any of our key personnel were to leave or retire, we may not be able to find an appropriate replacement on a timely basis and our results of operations could be negatively affected. Further, the loss of a significant number of employees or our inability to hire a sufficient number of qualified employees could have a material adverse effect on our business.



We are subject to federal, state and local regulation of our business, both in the U.S. and internationally. In the U.S., both the FAA and the FCC regulate the construction, modification, and maintenance of towers and structures that support antennas used for wireless communications and radio and television broadcasts. In addition, the FCC separately licenses and regulates wireless communications equipment, wireless radio stations, and radio and television broadcast stations operating from such towers. FAA and FCC regulations govern construction, lighting, painting, and marking of towers and may, depending on the characteristics of the tower, require registration of the tower. Certain proposals to construct new towers or to modify existing towers are reviewed by the FAA to ensure that the tower will not present a hazard to air navigation.

Tower owners may have an obligation to mark or paint such towers or install lighting to conform to FAA and FCC regulations and to maintain such marking, painting and lighting. Tower owners may also bear the responsibility of notifying the FAA of any lighting outages. Certain proposals to operate wireless communications and radio or television broadcast stations from towers are also reviewed by the FCC to ensure compliance with environmental impact requirements established in federal statutes, including NEPA, NHPA and ESA. Failure to comply with existing or future applicable requirements may lead to civil penalties or other liabilities and may subject us to significant indemnification liability to our customers against any such failure to comply. In addition, new regulations may impose additional costly burdens on us, which may affect our revenues and cause delays in our growth. Local regulations, including municipal or local ordinances, zoning restrictions and restrictive covenants imposed by community developers, vary greatly, but typically require tower owners to obtain approval from local officials or community standards organizations prior to tower construction or modification. Local regulations can delay, prevent, or increase the cost of new construction, co-locations, or site upgrades, thereby limiting our ability to respond to customer demand. In addition, new regulations may be adopted that increase delays or result in additional costs to us. In our international operations, the impact of these zoning, permitting and related regulations and restrictive covenants on our new builds, co-locations and operations could be exacerbated as some of these markets may lack established permitting processes for towers, have inconsistencies between national and local regulations and have other barriers to timely construction and permitting of towers. As a result, tower construction in some of our international markets may be delayed or halted or our acquired towers may not perform as anticipated. These factors could have a material adverse effect on our future growth and operations.

Security breaches and other disruptions could compromise our information, which would cause our business and reputation to suffer.

As part of our day-to-day operations, we rely on information technology and other computer resources and infrastructure to carry out important business activities and to maintain our business records. Our computer 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 and data theft), errors, catastrophic events such as natural disasters and other events beyond our control. If our or our vendors' computer systems and backup systems are compromised, degraded, damaged, or breached, or otherwise cease to function properly, we could suffer interruptions in our operations or unintentionally allow misappropriation of proprietary or confidential information (including information about our tenants or landlords). This could damage our reputation and disrupt our operations and the services we provide to customers, which could adversely affect our business and operating results.

Our towers are subject to damage from natural disasters and other unforeseen events.

Our towers are subject to risks associated with natural disasters such as tornadoes, hurricanes and earthquakes or may collapse for any number of reasons, including structural deficiencies. We maintain insurance to cover the estimated cost of replacing damaged towers, but these insurance policies are subject to loss limits and deductibles. We also maintain third party liability insurance, subject to loss limits and deductibles, to protect us in the event of an accident involving a tower. A tower accident for which we are uninsured or underinsured, or damage to a significant number of our towers, could require us to incur significant expenditures and may have a material adverse effect on our operations or financial condition and may harm our reputation.

To the extent that we are not able to meet our contractual obligations to our customers, due to a natural disaster or other catastrophic circumstances, our customers may not be obligated or willing to pay their lease expenses; however, we may be required to continue paying our fixed expenses related to the affected tower, including ground lease expenses. If we are unable to meet our contractual obligations to our customers for a material portion of our towers, our operations could be materially and adversely affected.



We could have liability under environmental laws that could have a material adverse effect on our business, financial condition and results of operations.

Our operations, like those of other companies engaged in similar businesses, are subject to the requirements of 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 owner, lessee, or operator of numerous tower structures, we may be liable for substantial costs of remediating soil and groundwater contaminated by hazardous materials without regard to whether we, as the owner, lessee, or operator, knew of or were responsible for the contamination. We may be subject to potentially significant fines or penalties if we fail to comply with any of these requirements. The current cost of complying with these laws is not material to our financial condition or results of operations. However, the requirements of these laws and regulations are complex, change frequently, and could become more stringent in the future. 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, financial condition and results of operations.

We could suffer adverse tax and other financial consequences if taxing authorities do not agree with our tax positions.

We are periodically subject to a number of tax examinations by taxing authorities in the states and countries where we do business. We also have significant net operating losses (“NOLs”) in U.S. federal and state taxing jurisdictions. Generally, for U.S. federal and state tax purposes, NOLs generated prior to the 2018 tax year can be carried forward and used for up to twenty years, and all of our tax years will remain subject to examination until three years after our NOLs are used or expire. NOLs generated starting in the 2018 tax year can be carried forward indefinitely but are subject to the 80% utilization limitation. We expect that we will continue to be subject to tax examinations in the future. In addition, U.S. federal, state and local, as well as international, tax laws and regulations are extremely complex and subject to varying interpretations. If our tax benefits, including from our use of NOLs or other tax attributes, are challenged successfully by a taxing authority, we may be required to pay additional taxes or penalties, or make additional distributions, which could have a material adverse effect on our business, results of operations and financial condition.

Our issuance of equity securities and other associated transactions may trigger a future ownership change which may negatively impact our ability to utilize NOLs in the future.

The issuance of equity securities and other associated transactions may increase the chance that we will have a future ownership change under Section 382 of the Internal Revenue Code of 1986 (“Code”). We may also have a future ownership change, outside of our control, caused by future equity transactions by our current shareholders. Depending on our market value at the time of such future ownership change, an ownership change under Section 382 could negatively impact our ability to utilize our NOLs and could result in us having to make additional cash distributions.

Our costs could increase and our revenues could decrease due to perceived health risks from RF energy.

The U.S. and other foreign governments impose requirements and other guidelines relating to exposure to RF energy. Exposure to high levels of RF energy can cause negative health effects. The potential connection between exposure to low levels of RF energy and certain negative health effects, including some forms of cancer, has been the subject of substantial study by the scientific community in recent years. According to the FCC, the results of these studies to date have been inconclusive. However, public perception of possible health risks associated with cellular and other wireless communications media could slow the growth of wireless companies, which could in turn slow our growth. In particular, negative public perception of, and regulations regarding, health risks could cause a decrease in the demand for wireless communications services. Moreover, if a connection between exposure to low levels of RF energy and possible negative health effects, including cancer, were demonstrated, we could be subject to numerous claims. Our current policies provide no coverage for claims based on RF energy exposure. If we were subject to claims relating to exposure to RF energy, even if such claims were not ultimately found to have merit, our financial condition could be materially and adversely affected.

The recently adopted US tax legislation may result in additional tax liabilities that may affect our future results and profitability.

In December 2017, the U.S. government enacted comprehensive tax legislation, commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”), that significantly revised the Code by, among other things, lowering the corporate income tax rate from a top marginal rate of 35% to a flat 21%, imposing a mandatory one-time deemed repatriation of foreign earnings (commonly referred to as the “transition tax”), limiting deductibility of interest expense and certain executive compensation and implementing a territorial tax system.



The Tax Act impacted our consolidated results of operations during the fourth quarter of 2017 and in 2018, and may impact our consolidated results of operations in future periods. In particular, the transition tax resulted in a one-time income inclusion of $49.2 million related to previously unremitted earnings of certain non-U.S. subsidiaries, which we will elect to include in income over the next eight tax years. The inclusion will be offset by our existing NOLs to the extent possible during the eight-year recognition period. In addition, we recorded a one-time reduction to our deferred tax asset and offsetting valuation allowance in the amount of $25.5 million, $19.2 million related to the reduction of the U.S. corporate tax rate, and $6.3 million related to the new limitations on the deductibility of executive compensation.

## Risks Related to Our Status as a REIT

Complying with the REIT requirements may cause us to liquidate assets or hinder our ability to pursue otherwise attractive asset acquisition opportunities.

To qualify as a REIT for federal income tax purposes, we must continually satisfy tests concerning, among other things, the nature and diversification of our assets, the sources of our income and the amounts we distribute to our shareholders. For example, to qualify as a REIT, we must ensure that, at the end of each calendar quarter, at least 75% of the value of our assets consists of cash, cash items, government securities and “real estate assets” (as defined in the Code), including towers and certain mortgage loans and securities. The remainder of our investments (other than government securities, qualified real estate assets and securities issued by a taxable REIT subsidiary (“TRS”)) generally cannot include more than 10% of the outstanding voting securities of any one issuer or more than 10% of the total value of the outstanding securities of any one issuer. In addition, in general, no more than 5% of the value of our total assets (other than government securities, qualified real estate assets and securities issued by a TRS) can consist of the securities of any one issuer, and no more than 20% of the value of our total assets can be represented by securities of one or more TRSs. If we fail to comply with these requirements at the end of any calendar quarter, we must correct the failure within 30 days after the end of the calendar quarter or qualify for certain statutory relief provisions to avoid losing our REIT qualification and suffering adverse tax consequences. As a result, we may be required to liquidate assets.

In addition to the asset tests set forth above, to qualify and be subject to tax as a REIT, we will generally be required to distribute at least 90% of our REIT taxable income after the utilization of any available NOLs (determined without regard to the dividends paid deduction and excluding net capital gain) each year to our shareholders. Our determination as to the timing or amount of future dividends will be based on a number of factors, including investment opportunities around our core business and the availability of our existing NOLs. To the extent that we satisfy the 90% distribution requirement, but distribute less than 100% of our REIT taxable income (after the application of available NOLs, if any), we will be subject to U.S. federal corporate income tax on our undistributed taxable income. In addition, we will be subject to a 4% nondeductible excise tax if the actual amount that we pay out to our shareholders for a calendar year is less than a minimum amount specified under the Code. These distribution requirements could hinder our ability to pursue otherwise attractive asset acquisition opportunities. Furthermore, our ability to compete for acquisition opportunities in domestic and international markets may be adversely affected if we need, or require, the target company to comply with certain REIT requirements. These actions could have the effect of reducing our income, amounts available for distribution to our shareholders and amounts available for making payments on our indebtedness.

Qualifying as a REIT involves highly technical and complex provisions of the Code. If we fail to qualify as a REIT or fail to remain qualified as a REIT, to the extent we have REIT taxable income and have utilized our NOLs, we will be subject to U.S. federal income tax as a regular corporation and could face a substantial tax liability, which would reduce the amount of cash available for distribution to our shareholders.

Qualification as a REIT involves the application of highly technical and complex Code provisions for which only limited judicial and administrative authorities exist. Even a technical or inadvertent violation could jeopardize our REIT qualification. Our qualification as a REIT will depend on our satisfaction of certain asset, income, organizational, distribution, shareholder ownership and other requirements on a continuing basis.

We received an opinion of our special REIT tax counsel with respect to our qualification as a REIT. Investors should be aware, however, that opinions of counsel are not binding on the IRS or any court. The opinion represents only the view of such counsel based on its review and analysis of existing law and on certain representations as to factual matters and covenants made by us, including representations relating to the values of our assets and the sources of our income. The opinion is expressed as of the date issued. Our qualification as a REIT will depend on our satisfaction of certain asset, income, organizational, distribution, shareholder ownership and other requirements on a continuing basis. Our ability to satisfy the asset tests depends upon our analysis of the characterization and fair market values of our assets, some of which are not susceptible to a precise determination, and for which we will not obtain independent appraisals.



If we fail to qualify as a REIT in any taxable year, to the extent we have REIT taxable income and have utilized our NOLs, we would be subject to U.S. federal income tax, including any applicable alternative minimum tax, on our taxable income at regular corporate rates, and dividends paid to our shareholders would not be deductible by us in computing our taxable income. Any resulting corporate tax liability could be substantial and would reduce the amount of cash available for distribution to our shareholders, which in turn could have an adverse impact on the value of our common stock. Unless we were entitled to relief under certain provisions of the Code, we also would be disqualified from re-electing to be taxed as a REIT for the four taxable years following the year in which we failed to qualify as a REIT. If we fail to qualify for taxation as a REIT, we may need to borrow additional funds or liquidate assets to pay any additional tax liability. Accordingly, funds available for investment and making payments on our indebtedness would be reduced.

## We may be required to borrow funds, sell assets, or raise equity to satisfy our REIT distribution requirements.

From time to time, we may generate REIT taxable income greater than our cash flow as a result of differences in timing between the recognition of taxable income and the actual receipt of cash or the effect of nondeductible capital expenditures, the creation of reserves or required debt or amortization payments. If we do not have other funds available in these situations, we may need to borrow funds, sell assets or raise equity, even if the then-prevailing market conditions are not favorable for these borrowings, sales or offerings, to enable us to satisfy the REIT distribution requirement and to avoid U.S. federal corporate income tax and the 4% excise tax in a particular year. These alternatives could increase our costs and our leverage, decrease our Adjusted Funds From Operations per share or require us to distribute amounts that would otherwise be invested in future acquisitions or stock repurchases.

Thus, compliance with the REIT requirements may hinder our ability to grow, which could adversely affect the value of our common stock. Furthermore, compliance with the REIT distribution requirements may increase the financing we need to fund capital expenditures, future growth, or expansion initiatives, which would increase our total leverage.

## Covenants specified in our current and future debt instruments may limit our ability to make required REIT distributions.

The Senior Credit Agreement, the mortgage loan agreement related to our securitization transactions and the indentures governing our 2014 Senior Notes, 2016 Senior Notes, and 2017 Senior Notes contain certain covenants that could limit our ability to make distributions to our shareholders. Under the Senior Credit Agreement, our subsidiaries may make distributions to us to satisfy our REIT distribution requirements and additional amounts to distribute up to 100% of our REIT taxable income, so long as SBA Senior Finance II's ratio of Consolidated Net Debt to Annualized Borrower EBITDA does not exceed 6.5 times for any fiscal quarter. In addition, under the mortgage loan agreement related to our securitization transactions, or Securitization, a failure to comply with the Debt Service Coverage Ratio in that agreement could prevent our borrower subsidiaries from distributing any excess cash from the operation of their towers to us. Finally, while the indentures governing the 2014 Senior Notes, 2016 Senior Notes, and 2017 Senior Notes permit us to make distributions to our shareholders to the extent such distributions are necessary to maintain our status as a REIT or to avoid entity level taxation, this authority is subject to the conditions that no default or event of default exists or would result therefrom and that the obligations under the 2014 Senior Notes, 2016 Senior Notes, or 2017 Senior Notes, as applicable, have not otherwise been accelerated.

If these limitations prevent us from satisfying our REIT distribution requirements, we could fail to qualify for taxation as a REIT. If these limitations do not jeopardize our qualification for taxation as a REIT but do nevertheless prevent us from distributing 100% of our REIT taxable income, we will be subject to U.S. federal corporate income tax, and potentially the nondeductible 4% excise tax, on the retained amounts.

Our payment of cash distributions in the future is not guaranteed and the amount of any future cash distributions may fluctuate, which could adversely affect the value of our Class A common stock.

REITs are required to distribute annually at least 90% of their REIT taxable income (determined before the deduction for dividends paid and excluding any net capital gain). As of December 31, 2018, $755.4 million of our federal NOLs are attributes of the REIT. We may use these NOLs to offset our REIT taxable income, and thus any required distributions to shareholders may be reduced or eliminated until such time as the NOLs have been fully utilized. The Code places limitations upon the future availability of NOLs based upon changes in our equity. If these occur, our ability to offset future income with existing NOLs may be limited. We currently expect that we will utilize available NOLs to reduce all or a portion of our REIT taxable income and therefore we may not initially make any distributions, which may adversely affect the market value of our Class A common stock.

The amount of future distributions will be determined, from time to time, by the Board of Directors to balance our goal of increasing long-term shareholder value and retaining sufficient cash to implement our current capital allocation policy, which prioritizes investment in quality assets that meet our return criteria, and then stock repurchases, when we believe our stock price is below its intrinsic value. The actual timing and amount of distributions will be as determined and declared by the Board of Directors.



and will depend on, among other factors, our NOLs, our financial condition, earnings, debt covenants and other possible uses of such funds. Consequently, our future distribution levels may fluctuate.

Certain of our business activities may be subject to corporate level income tax and foreign taxes, which would reduce our cash flows, and would have potential deferred and contingent tax liabilities.

We may be subject to certain federal, state, local and foreign taxes on our income and assets, including alternative minimum taxes, taxes on any undistributed income and state, local or foreign income, franchise, property and transfer taxes. In addition, we could, in certain circumstances, be required to pay an excise or penalty tax, which could be significant in amount, in order to utilize one or more relief provisions under the Code to maintain qualification for taxation as a REIT. In addition, we may incur a 100% excise tax on transactions with a TRS if they are not conducted on an arm’s length basis. Any of these taxes would decrease our earnings and our available cash.

Our TRS assets and operations also will continue to be subject, as applicable, to federal and state corporate income taxes and to foreign taxes in the jurisdictions in which those assets and operations are located. If we continue our international expansion, we may have additional TRS assets and operations subject to such taxes. Any of these taxes would decrease our earnings and our available cash.

We will also be subject to a federal corporate level tax at the highest regular corporate rate (currently 21%) on the gain recognized from a sale of assets occurring during our first five years as a REIT, up to the amount of the built-in gain that existed on January 1, 2016, which is based on the fair market value of those assets in excess of our tax basis in those assets as of January 1, 2016. Gain from a sale of an asset occurring after the specified period ends will not be subject to this corporate level tax. We currently do not expect to sell any asset if the sale would result in the imposition of a material tax liability. We cannot, however, assure you that we will not change our plans in this regard.

## Our use of TRSs may cause us to fail to qualify as a REIT.

The net income of our TRSs is not required to be distributed to us, and such undistributed TRS income is generally not subject to our REIT distribution requirements. However, if the accumulation of cash or reinvestment of significant earnings in our TRSs causes the fair market value of our securities in those entities, taken together with other non-qualifying assets, to represent more than 20% (25% for taxable years beginning prior to December 31, 2017) of the value of our total assets, in each case, as determined for REIT asset testing purposes, we would, absent timely responsive action, fail to qualify as a REIT. If we continue our international expansion, we may have increased net income from TRSs, which may cause us to rise above these thresholds.

## Legislative or other actions affecting REITs could have a negative effect on us.

The rules dealing with U.S. federal income taxation are constantly under review by persons involved in the legislative process and by the IRS and the Treasury. Changes to the tax laws or interpretations thereof, with or without retroactive application, could materially and adversely affect our investors or us. We cannot predict how changes in the tax laws might affect our investors or us. New legislation, U.S. Treasury Regulations, administrative interpretations or court decisions could significantly and negatively affect our ability to qualify as a REIT or the U.S. federal income tax consequences to our investors and us of such qualification.

Our Board’s ability to revoke our REIT qualification, without shareholder approval, may cause adverse consequences to our shareholders.

Our articles of incorporation provide that our Board of Directors may revoke or otherwise terminate our REIT election, without the approval of our shareholders, if it determines that it is no longer in our best interests to continue to qualify as a REIT. If we cease to be a REIT, we will not be allowed a deduction for dividends paid to shareholders, if any, in computing our taxable income, and to the extent we have taxable income and have utilized our NOLs, we will be subject to U.S. federal income tax at regular corporate rates and state and local taxes, which may have adverse consequences on our total return to our shareholders.

We began operating as a REIT in 2016, which may adversely affect our financial condition, results of operations, cash flow, per share trading price of our common stock and ability to satisfy debt service obligations.

We began operating as a REIT in 2016 and may not be able to continue to operate successfully as a REIT. In addition, we are required to maintain substantial control systems and procedures in order to maintain our status as a REIT. We have also incurred additional legal, accounting and other expenses that we did not incur prior to operating as a REIT and our management and other personnel have devoted additional time to comply with these rules and regulations and controls required for continued compliance with the Code. These factors may adversely affect our performance as a REIT. If our performance is adversely affected, it could affect our financial condition, results of operations, cash flow and ability to satisfy our debt service obligations.



## Dividends payable by REITs do not qualify for the reduced tax rates available for some dividends.

The maximum U.S. federal income tax rate applicable to income from “qualified dividends” payable to U.S. shareholders that are individuals, trusts and estates is currently 20%. Dividends payable by REITs, however, generally are not eligible for the reduced rates applicable to qualified dividends. Although these rules do not adversely affect the taxation of REITs, the more favorable rates applicable to regular corporate qualified dividends could cause investors who are individuals, trusts and estates to perceive investments in REITs to be relatively less attractive than investments in the stocks of non-REIT corporations that pay dividends, which could adversely affect the value of the stock of REITs, including our common stock. REIT ordinary income distributions are generally eligible for a 20% deduction to the extent distributed out of the REIT’s taxable income.

## Risks Related to Ownership of our Class A Common Stock

The REIT-related ownership and transfer restrictions may restrict or prevent our shareholders from engaging in certain transfers of our common stock.

In order for us to satisfy the requirements for REIT qualification, no more than 50% in value of all classes or series of our outstanding shares of stock may be owned, beneficially or constructively, by five or fewer individuals (as defined in the Code to include certain entities) at any time during the last half of each taxable year (other than the first year for which an election to be subject to tax as a REIT has been made). In addition, our capital stock must be beneficially owned by 100 or more persons during at least 335 days of a taxable year of 12 months or during a proportionate part of a shorter taxable year (other than the first year for which an election to be taxed as a REIT has been made). Our articles of incorporation contain REIT-related ownership and transfer restrictions that generally restrict shareholders from owning more than 9.8%, by value or number of shares, whichever is more restrictive, of our outstanding shares of Class A common stock, or 9.8% in aggregate value of the outstanding shares of all classes and series of our capital stock. Under applicable constructive ownership rules, any shares of stock owned by certain affiliated owners generally would be added together for purposes of the ownership limits. These ownership and transfer restrictions could have the effect of delaying, deferring or preventing a transaction or a change in control that might involve a premium price for our capital stock or otherwise be in the best interest of our shareholders.

Future sales of our Class A common stock in the public market or the issuance of other equity may cause dilution or adversely affect the market price of our Class A common stock and our ability to raise funds in new equity or equity-related offerings.

Sales of a substantial number of shares of our Class A common stock or other equity-related securities in the public market, including sales by any selling shareholder, could depress the market price of our Class A common stock and impair our ability to raise capital through the sale of additional equity securities.

Our articles of incorporation, our bylaws and Florida law provide for anti-takeover provisions that could make it more difficult for a third party to acquire us.

Provisions of our articles of incorporation, our bylaws and Florida law could make it more difficult for a third party to acquire us, even if doing so would be beneficial to our shareholders. These provisions, alone or in combination with each other, may discourage transactions involving actual or potential changes of control, including transactions that otherwise could involve payment of a premium over prevailing market prices to holders of our Class A common stock, or could limit the ability of our shareholders to approve transactions that they may deem to be in their best interests.

## ITEM 2. PROPERTIES

We own our headquarters in Boca Raton, Florida where we currently have approximately 160,000 square feet of office space. We also own or have entered into long-term leases for international and regional locations convenient for the management and operation of our site leasing activities, and in certain site development office locations where we expect our activities to be longer-term. We open and close project offices from time to time in connection with our site development business. We believe our existing facilities are adequate for our current and planned levels of operations and that additional office space suited for our needs is reasonably available in the markets within which we operate.

Our interests in towers and the land beneath them are comprised of a variety of fee interests, leasehold interests created by long-term lease agreements, perpetual easements, easements, licenses, rights-of-way, and other similar interests. As of December 31, 2018, approximately 71% of our tower structures were located on parcels of land that we own, land subject to perpetual easements, or parcels of land that have an interest that extends beyond 20 years. The average remaining life under our ground leases, including



renewal options under our control, is 36 years. In rural areas, support for our towers, equipment shelters, and related equipment requires a tract of land typically up to 10,000 square feet. Less than 2,500 square feet is required for a monopole or self-supporting tower of the kind typically used in metropolitan areas for wireless communications towers. Ground leases are generally for an initial term of five years or more with multiple 5-year renewal periods, for a total of thirty years or more.

Most of our towers have significant capacity available for additional antennas. We measure the available capacity of our existing facilities to support additional tenants and generate additional lease revenue by assessing several factors, including tower height, tower type, wind loading, environmental conditions, existing equipment on the tower and zoning and permitting regulations in effect in the jurisdiction where the tower is located. As of December 31, 2018, we had an average of 1.8 tenants per tower structure.

## ITEM 3. LEGAL PROCEEDINGS

We are involved in various legal proceedings relating to claims arising in the ordinary course of business. We do not believe that the ultimate resolution of these matters will have a material adverse effect on our business, financial condition, results of operations or liquidity.

## ITEM 4. MINE SAFETY DISCLOSURE

Not Applicable.

## PART II

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

## Market for our Class A Common Stock

Our Class A common stock commenced trading under the symbol “SBAC” on The NASDAQ National Market System on June 16, 1999. We now trade on the NASDAQ Global Select Market, a segment of the NASDAQ Global Market, formally known as the NASDAQ National Market System.

As of February 21, 2019, there were 234 record holders of our Class A common stock.

## Dividends

We have never paid a dividend on any class of common stock. As a REIT, we are required to distribute annually at least 90% of our REIT taxable income after the utilization of any available NOLs (determined before the deduction for dividends paid and excluding any net capital gain). As of December 31, 2018, $755.4 million of the federal NOLs are attributes of the REIT. We may use these NOLs to offset our REIT taxable income, and thus any required distributions to shareholders may be reduced or eliminated until such time as our NOLs have been fully utilized. The amount of future distributions will be determined, from time to time, by the board of directors to balance our goal of increasing long-term shareholder value and retaining sufficient cash to implement our current capital allocation policy, which prioritizes investment in quality assets that meet our return criteria, and then stock repurchases when we believe our stock price is below its intrinsic value. The actual amount, timing and frequency of future dividends, will be at the sole discretion of the board of directors and will be declared based upon various factors, many of which are beyond our control.



## Issuer Purchases of Equity Securities

The following table presents information related to our repurchases of Class A common stock during the fourth quarter of 2018:

<table><tr><td rowspan="2"></td><td colspan="2">Total</td><td colspan="2">Total Number of Shares</td><td colspan="2">Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs</td></tr><tr><td>Number of Shares</td><td>Average Price Paid</td><td>Purchased as Part of Publicly Announced Plans or Programs (1)</td><td></td><td></td><td></td></tr><tr><td>Period</td><td>Purchased</td><td>Per Share</td><td></td><td></td><td></td><td></td></tr><tr><td>10/1/2018 - 10/31/2018</td><td>936,981</td><td>$ 151.55</td><td></td><td>936,981</td><td>$ 404,518,419</td><td></td></tr><tr><td>11/1/2018 - 11/30/2018</td><td>—</td><td>$ —</td><td></td><td>—</td><td>$ 404,518,419</td><td></td></tr><tr><td>12/1/2018 - 12/31/2018</td><td>1,226,357</td><td>$ 163.08</td><td></td><td>1,226,357</td><td>$ 204,518,536</td><td></td></tr><tr><td>Total</td><td>2,163,338</td><td>$ 158.09</td><td></td><td>2,163,338</td><td>$ 204,518,536</td><td></td></tr></table>

(1) On February 16, 2018, our Board of Directors authorized a $1.0 billion stock repurchase plan, replacing the plan authorized on January 12, 2017. This plan authorizes us to purchase, from time to time, up to $1.0 billion of our outstanding Class A common stock through open market repurchases in compliance with Rule 10b-18 under the Exchange Act, and/or in privately negotiated transactions at management’s discretion based on market and business conditions, applicable legal requirements, and other factors. Shares repurchased will be retired. This plan has no time deadline and will continue until otherwise modified or terminated by our Board of Directors at any time in its sole discretion.



## ITEM 6. SELECTED FINANCIAL DATA

The following table sets forth selected historical financial data as of and for each of the five years in the period ended December 31, 2018. The financial data for the fiscal years ended 2018, 2017, 2016, 2015, and 2014 have been derived from our audited consolidated financial statements. You should read the information set forth below in conjunction with our “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our consolidated financial statements and the related notes to those consolidated financial statements included in this Form 10-K.

<table><tr><td rowspan="3"></td><td colspan="5">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td><td>2015</td><td>2014</td></tr><tr><td colspan="5">(audited) (in thousands, except for per share data)</td></tr><tr><td>Revenues:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Site leasing</td><td>$ 1,740,434</td><td>$ 1,623,173</td><td>$ 1,538,070</td><td>$ 1,480,634</td><td>$ 1,360,202</td></tr><tr><td>Site development</td><td>125,261</td><td>104,501</td><td>95,055</td><td>157,840</td><td>166,794</td></tr><tr><td>Total revenues</td><td>1,865,695</td><td>1,727,674</td><td>1,633,125</td><td>1,638,474</td><td>1,526,996</td></tr><tr><td>Operating expenses:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cost of revenues (exclusive of depreciation, accretion, and amortization shown below):</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cost of site leasing</td><td>372,296</td><td>359,527</td><td>342,215</td><td>324,655</td><td>301,313</td></tr><tr><td>Cost of site development</td><td>96,499</td><td>86,785</td><td>78,682</td><td>119,744</td><td>127,172</td></tr><tr><td>Selling, general, and administrative</td><td>142,526</td><td>130,697</td><td>143,349</td><td>114,951</td><td>103,317</td></tr><tr><td>Acquisition related adjustments and expenses</td><td>10,961</td><td>12,367</td><td>13,140</td><td>11,864</td><td>7,798</td></tr><tr><td>Asset impairment and decommission costs</td><td>27,134</td><td>36,697</td><td>30,242</td><td>94,783</td><td>23,801</td></tr><tr><td>Depreciation, accretion, and amortization</td><td>672,113</td><td>643,100</td><td>638,189</td><td>660,021</td><td>627,072</td></tr><tr><td>Total operating expenses</td><td>1,321,529</td><td>1,269,173</td><td>1,245,817</td><td>1,326,018</td><td>1,190,473</td></tr><tr><td>Operating income</td><td>544,166</td><td>458,501</td><td>387,308</td><td>312,456</td><td>336,523</td></tr><tr><td>Other income (expense):</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Interest income</td><td>6,731</td><td>11,337</td><td>10,928</td><td>3,894</td><td>677</td></tr><tr><td>Interest expense</td><td>(376,217)</td><td>(323,749)</td><td>(329,171)</td><td>(322,366)</td><td>(292,600)</td></tr><tr><td>Non-cash interest expense</td><td>(2,640)</td><td>(2,879)</td><td>(2,203)</td><td>(1,505)</td><td>(27,112)</td></tr><tr><td>Amortization of deferred financing fees</td><td>(20,289)</td><td>(21,940)</td><td>(21,136)</td><td>(19,154)</td><td>(17,572)</td></tr><tr><td>Loss from extinguishment of debt, net</td><td>(14,443)</td><td>(1,961)</td><td>(52,701)</td><td>(783)</td><td>(26,204)</td></tr><tr><td>Other (expense) income, net</td><td>(85,624)</td><td>(2,418)</td><td>94,278</td><td>(139,137)</td><td>10,628</td></tr><tr><td>Total other expense</td><td>(492,482)</td><td>(341,610)</td><td>(300,005)</td><td>(479,051)</td><td>(352,183)</td></tr><tr><td>Income (loss) before provision for income taxes</td><td>51,684</td><td>116,891</td><td>87,303</td><td>(166,595)</td><td>(15,660)</td></tr><tr><td>Provision for income taxes</td><td>(4,233)</td><td>(13,237)</td><td>(11,065)</td><td>(9,061)</td><td>(8,635)</td></tr><tr><td>Net income (loss)</td><td>$ 47,451</td><td>$ 103,654</td><td>$ 76,238</td><td>$ (175,656)</td><td>$ (24,295)</td></tr><tr><td>Basic net income (loss) per common share</td><td>$ 0.41</td><td>$ 0.86</td><td>$ 0.61</td><td>$ (1.37)</td><td>$ (0.19)</td></tr><tr><td>Diluted net income (loss) per common share</td><td>$ 0.41</td><td>$ 0.86</td><td>$ 0.61</td><td>$ (1.37)</td><td>$ (0.19)</td></tr><tr><td>Weighted average common shares outstanding:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Basic</td><td>114,909</td><td>119,860</td><td>124,448</td><td>127,794</td><td>128,919</td></tr><tr><td>Diluted</td><td>116,515</td><td>121,022</td><td>125,144</td><td>127,794</td><td>128,919</td></tr></table>



<table><tr><td rowspan="2"></td><td colspan="6">As of December 31,</td></tr><tr><td>2018</td><td>2017</td><td colspan="2">2016</td><td>2015</td><td>2014</td></tr><tr><td>Balance Sheet Data</td><td></td><td></td><td colspan="2">(audited) (in thousands)</td><td></td><td></td></tr><tr><td>Cash and cash equivalents</td><td>$ 143,444</td><td>$ 68,783</td><td>$ 146,109</td><td>$ 118,039</td><td>$ 39,443</td><td></td></tr><tr><td>Restricted cash - current</td><td>32,464</td><td>32,924</td><td>36,786</td><td>25,353</td><td>52,519</td><td></td></tr><tr><td>Property and equipment, net</td><td>2,786,355</td><td>2,812,346</td><td>2,792,076</td><td>2,782,353</td><td>2,762,417</td><td></td></tr><tr><td>Intangibles, net</td><td>3,331,465</td><td>3,598,131</td><td>3,656,924</td><td>3,735,413</td><td>4,189,540</td><td></td></tr><tr><td>Total assets</td><td>7,213,707</td><td>7,320,205</td><td>7,360,945</td><td>7,312,980</td><td>7,748,635</td><td></td></tr><tr><td>Total debt</td><td>9,938,553</td><td>9,310,686</td><td>8,775,583</td><td>8,452,070</td><td>7,768,309</td><td></td></tr><tr><td>Total shareholders&#x27; deficit</td><td>(3,376,823)</td><td>(2,599,114)</td><td>(1,995,921)</td><td>(1,706,144)</td><td>(660,801)</td><td></td></tr></table>

<table><tr><td rowspan="2"></td><td colspan="5">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td><td>2015</td><td>2014</td></tr><tr><td>Other Data</td><td></td><td></td><td>(audited) (in thousands)</td><td></td><td></td></tr><tr><td>Cash provided by (used in):</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Operating activities</td><td>$ 850,618</td><td>$ 818,470</td><td>$ 742,525</td><td>$ 723,030</td><td>$ 674,340</td></tr><tr><td>Investing activities</td><td>(618,347)</td><td>(605,107)</td><td>(428,235)</td><td>(737,065)</td><td>(1,764,127)</td></tr><tr><td>Financing activities</td><td>(148,537)</td><td>(294,574)</td><td>(288,557)</td><td>75,751</td><td>995,298</td></tr></table>

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

The following discussion of our financial condition and results of operations should be read in conjunction with the information contained in our consolidated financial statements and the notes thereto. The following discussion includes forward-looking statements that involve certain risks and uncertainties, including, but not limited to, those described in Item 1A. Risk Factors. Our actual results may differ materially from those discussed below. See “Special Note Regarding Forward-Looking Statements” and Item 1A. Risk Factors.

We are a leading independent owner and operator of wireless communications infrastructure, including tower structures, rooftops and other structures that support antennas used for wireless communications, which we collectively refer to as “towers” or “sites.” Our principal operations are in the United States and its territories. In addition, we own and operate towers in South America, Central America, and Canada. Our primary business line is our site leasing business, which contributed 98.0% of our total segment operating profit for the year ended December 31, 2018. In our site leasing business, we (1) lease antenna space to wireless service providers on towers that we own or operate and (2) manage rooftop and tower sites for property owners under various contractual arrangements. As of December 31, 2018, we owned 29,578 towers, a substantial portion of which have been built by us or built by other tower owners or operators who, like us, have built such towers to lease space to multiple wireless service providers. We also managed or leased approximately 9,700 actual or potential sites, approximately 500 of which were revenue producing as of December 31, 2018. Our other business line is our site development business, through which we assist wireless service providers in developing and maintaining their own wireless service networks.

## Site Leasing Services

Our primary focus is the leasing of antenna space on our multi-tenant towers to a variety of wireless service providers under long-term lease contracts in the United States, Canada, Central America, and South America. As of December 31, 2018, (1) no U.S. state or territory accounted for more than 10% of our total tower portfolio by tower count, and (2) no U.S. state or territory accounted for more than 10% of our total revenues for the year ended December 31, 2018. In addition, as of December 31, 2018, approximately 28.9% of our total towers are located in Brazil and less than 3% of our total towers are located in any of our other international markets (each country is considered a market). We derive site leasing revenues primarily from wireless service provider tenants, including AT&T, T-Mobile, Verizon Wireless, Sprint, Oi S.A., Telefonica, Claro, and TIM. Wireless service providers enter into tenant leases with us, each of which relates to the lease or use of space at an individual site. In the United States and Canada, our



tenant leases are generally for an initial term of five to ten years with multiple 5-year renewal periods at the option of the tenant. These tenant leases typically contain specific rent escalators, which average 3-4% per year, including the renewal option periods. Tenant leases in our Central American and South American markets typically have an initial term of ten years with multiple 5-year renewal periods. In Central America, we have similar rent escalators to that of leases in the United States and Canada while our leases in South America escalate in accordance with a standard cost of living index. Site leases in South America typically provide for a fixed rental amount and a pass through charge for the underlying ground lease rent.

Ground leases are generally for an initial term of five years or more with multiple 5-year renewal periods at our option and provide for rent escalators which typically average 2-3% annually, or in our South American markets, adjust in accordance with a standard cost of living index. As of December 31, 2018, approximately 71% of our tower structures were located on parcels of land that we own, land subject to perpetual easements, or parcels of land in which we have a leasehold interest that extends beyond 20 years. For any given tower, costs are relatively fixed over a monthly or an annual time period. As such, operating costs for owned towers do not generally increase as a result of adding additional customers to the tower. The amount of property taxes varies from site to site depending on the taxing jurisdiction and the height and age of the tower. The ongoing maintenance requirements are typically minimal and include replacing lighting systems, painting a tower, or upgrading or repairing an access road or fencing.

In our Central American markets and Ecuador, significantly all of our revenue, expenses, and capital expenditures arising from our new build activities are denominated in U.S. dollars. Specifically, most of our ground leases, tenant leases, and tower-related expenses are due and paid in U.S. dollars. In our Central American markets, our local currency obligations are principally limited to (1) permitting and other local fees, (2) utilities, and (3) taxes. In Brazil, Canada, and Chile, significantly all of our revenue, expenses, and capital expenditures, including tenant leases, ground leases, and other tower-related expenses are denominated in local currency. In Colombia, Argentina, and Peru, our revenue, expenses, and capital expenditures, including tenant leases, ground leases, and other tower-related expenses are denominated in a mix of local currency and U.S. dollars.

Cost of site leasing revenue primarily consists of:

• Rental payments on ground leases and other underlying property interests;

• Property taxes;

• Site maintenance and monitoring costs (exclusive of employee related costs);

• Utilities;

• Property insurance;

• Lease origination cost amortization; and

- Straight-line rent adjustment for the difference between rental payments made and the expense recorded as if the payments had been made evenly throughout the lease term (which may include renewal terms) of the underlying property interests.

As indicated in the table below, our site leasing business generates substantially all of our total segment operating profit. For information regarding our operating segments, see Note 18 of our Consolidated Financial Statements included in this annual report.

<table><tr><td rowspan="2">Segment operating profit as a percentage of total</td><td colspan="3">For the year ended</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>Domestic site leasing</td><td>81.2%</td><td>81.8%</td><td>83.6%</td></tr><tr><td>International site leasing</td><td>16.8%</td><td>16.9%</td><td>15.1%</td></tr><tr><td>Total site leasing</td><td>98.0%</td><td>98.7%</td><td>98.7%</td></tr></table>

We believe that the site leasing business continues to be attractive due to its long-term contracts, built-in rent escalators, high operating margins, and low customer churn (which refers to when a customer does not renew its lease or cancels its lease prior to the end of its term) other than in connection with customer consolidation or cessation of a particular technology. We believe that over the long-term, site leasing revenues will continue to grow as wireless service providers lease additional antenna space on our towers due to increasing minutes of network use and data transfer, network expansion and network coverage requirements. During 2019, we expect organic site leasing revenue in both our domestic and international segments to increase over 2018 levels due in part to wireless carriers deploying unused spectrum. We believe our site leasing business is characterized by stable and long-term recurring revenues, predictable operating costs and minimal non-discretionary capital expenditures. Due to the relatively young age and mix of our tower portfolio, we expect future expenditures required to maintain these towers to be minimal. Consequently, we expect to grow our cash flows by (1) adding tenants to our towers at minimal incremental costs by using existing tower capacity or requiring wireless service providers to bear all or a portion of the cost of tower modifications and (2) executing monetary amendments as wireless service providers add or upgrade their equipment. Furthermore, because our towers are strategically positioned and our customers typically do



not relocate, we have historically experienced low tenant lease terminations as a percentage of revenue other than in connection with customer consolidation or cessations of a specific technology (e.g. iDEN, MetroPCS, Clearwire, and Cricket).

## Site Development Services

Our site development business, which is conducted in the United States only, is complementary to our site leasing business and provides us the ability to keep in close contact with the wireless service providers who generate substantially all of our site leasing revenue and to capture ancillary revenues that are generated by our site leasing activities, such as antenna and equipment installation at our tower locations. Site development services revenues are earned primarily from providing a full range of end to end services to wireless service providers or companies providing development or project management services to wireless service providers. Our services include: (1) network pre-design; (2) site audits; (3) identification of potential locations for towers and antennas on existing infrastructure; (4) support in leasing of the location; (5) assistance in obtaining zoning approvals and permits; (6) tower and related site construction; (7) antenna installation; and (8) radio equipment installation, commissioning, and maintenance. We provide site development services at our towers and at towers owned by others on a local basis, through regional, market, and project offices. The market offices are responsible for all site development operations.

For information regarding our operating segments, see Note 18 of our Consolidated Financial Statements included in this annual report.

## Capital Allocation Strategy

Our capital allocation strategy is to prioritize investment in quality assets that meet our return criteria and then stock repurchases when we believe our stock price is below its intrinsic value. A primary goal of our capital allocation strategy is to increase our Adjusted Funds From Operations per share. To achieve this, we expect we would continue to deploy capital between portfolio growth and stock repurchases, subject to compliance with REIT distribution requirements, available funds and market conditions, while maintaining our target leverage levels. Key elements of our capital allocation strategy include:

Portfolio Growth. We intend to continue to grow our tower portfolio, domestically and internationally, through tower acquisitions and the construction of new towers.

Stock Repurchase Program. We currently utilize stock repurchases as part of our capital allocation policy when we believe our share price is below its intrinsic value. We believe that share repurchases, when purchased at the right price, will facilitate our goal of increasing our Adjusted Funds From Operations per share.

## Critical Accounting Policies and Estimates

We have identified the policies and significant estimation processes below as critical to our business operations and the understanding of our results of operations. The listing is not intended to be a comprehensive list. In many cases, the accounting treatment of a particular transaction is specifically dictated by accounting principles generally accepted in the United States, with no need for management’s judgment in their application. In other cases, management is required to exercise judgment in the application of accounting principles with respect to particular transactions. The impact and any associated risks related to these policies on our business operations is discussed throughout “Management’s Discussion and Analysis of Financial Condition and Results of Operations” where such policies affect reported and expected financial results. For a detailed discussion on the application of these and other accounting policies, see Note 2 of our Consolidated Financial Statements for the year ended December 31, 2018, included herein. Our preparation of our financial statements requires us to make estimates and assumptions that affect the reported amount of assets and liabilities, disclosure of contingent assets and liabilities at the date of our financial statements, and the reported amounts of revenue and expenses during the reporting periods. Management bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances. There can be no assurance that actual results will not differ from those estimates and such differences could be significant.

## Revenue Recognition and Accounts Receivable

Revenue from site leasing is recognized on a straight-line basis over the current term of the related lease agreements, which are generally five to ten years. Receivables recorded related to the straight-lining of site leases are reflected in other assets on the Consolidated Balance Sheets. Rental amounts received in advance are recorded as deferred revenue on the Consolidated Balance Sheets. Revenue from site leasing represents 93% of our total revenue.



Site development projects in which we perform consulting services include contracts on a fixed price basis that are billed at contractual rates. Revenue is recognized over time based on milestones achieved, which are determined based on costs incurred. Amounts billed in advance (collected or uncollected) are recorded as deferred revenue on our Consolidated Balance Sheets.

Revenue from construction projects is recognized over time, determined by the percentage of cost incurred to date compared to management’s estimated total cost for each contract. This method is used because management considers total cost to be the best available measure of progress on the contracts. These amounts are based on estimates, and the uncertainty inherent in the estimates initially is reduced as work on the contracts nears completion. Refer to Note 9 in our Consolidated Financial Statements included in this annual report for further detail of costs and estimated earnings in excess of billings on uncompleted contracts. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined to be probable.

The site development segment represents approximately 7% of our total revenues. We account for site development revenue in accordance with ASC 606, Revenue from Contracts with Customers, which was adopted on January 1, 2018 by applying the modified retrospective transition method. Payment terms do not result in any significant financing arrangements. Furthermore, these contracts do not typically include variable consideration; therefore, the transaction price that is recognized over time is generally the amount of the total contract. The cumulative effect of initially applying the new revenue standard had no impact on our financial results. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The adoption of the new standard had no impact to net income on an ongoing basis.

The accounts receivable balance for the years ended December 31, 2018 and 2017 was $111.0 million and $90.7 million, respectively, of which $27.1 and $20.8 million related to the site development segment, respectively. We perform periodic credit evaluations of our customers. In addition, we monitor collections and payments from our customers and maintain a provision for estimated credit losses based upon historical experience, specific customer collection issues identified, and past due balances as determined based on contractual terms. Interest is charged on outstanding receivables from customers on a case by case basis in accordance with the terms of the respective contracts or agreements with those customers. Amounts determined to be uncollectible are written off against the allowance for doubtful accounts in the period in which uncollectibility is determined to be probable. Refer to Note 18 in our Consolidated Financial Statements included in this annual report for further detail of the site development segment.

## Recent Accounting Pronouncements Not Yet Adopted

In February 2016, the FASB issued ASU 2016-02, Leases. The standard requires lessees to recognize a right-of-use asset and a lease liability, initially measured at the present value of the lease payments for all leases with a term greater than 12 months. The accounting for lessors remains largely unchanged from existing guidance. The Company has adopted this standard as of January 1, 2019. This guidance will have a material impact on the Company’s consolidated balance sheet due to the recognition of lease liabilities for its ground leases of approximately $2.3 billion to $2.7 billion. Adoption of this guidance will not have a significant impact on the Company’s lease classification, a material impact on its consolidated statement of operations, or a notable impact on its liquidity. Additionally, the standard will have no impact on the Company’s debt-covenant compliance under its current agreements.

In July 2018, the FASB issued additional guidance on the accounting for leases. The guidance provides companies with another transition method that allows entities to recognize a cumulative-effect adjustment to the opening balance of retained earnings as of the date of adoption. Under this method, previously presented years' financial positions and results are not adjusted. The Company adopted this alternative transition method. The new guidance also provides lessors with a practical expedient, by class of underlying asset, to not separate non-lease components from the associated lease component if (1) the non-lease components would otherwise be accounted for under the new revenue recognition standard, (2) both the timing and pattern of transfer are the same for the non-lease components and associated lease component, and (3) if accounted for separately, the lease component would be classified as an operating lease. The Company adopted this practical expedient in its accounting for leases.

## RESULTS OF OPERATIONS

This report presents our financial results and other financial metrics after eliminating the impact of changes in foreign currency exchange rates. We believe that providing these financial results and metrics on a constant currency basis, which are non-GAAP measures, gives management and investors the ability to evaluate the performance of our business without the impact of foreign currency exchange rate fluctuations. We eliminate the impact of changes in foreign currency exchange rates by dividing the current period’s financial results by the average monthly exchange rates of the prior year period, as well as by eliminating the impact of the remeasurement of our intercompany loans.



## Year Ended 2018 Compared to Year Ended 2017

## Revenues and Segment Operating Profit:

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended</td><td rowspan="3">Foreign Currency Impact</td><td rowspan="3">Constant Currency Change</td><td rowspan="3">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td><td>2017</td></tr><tr><td>2018</td><td>2017</td><td></td></tr><tr><td>Revenues</td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$ 1,400,095</td><td>$ 1,308,389</td><td>$ —</td><td>$ —</td><td>91,706</td><td>7.0%</td></tr><tr><td>International site leasing</td><td>340,339</td><td>314,784</td><td>(31,343)</td><td>56,898</td><td>18.1%</td><td></td></tr><tr><td>Site development</td><td>125,261</td><td>104,501</td><td>—</td><td>20,760</td><td>19.9%</td><td></td></tr><tr><td>Total</td><td>$ 1,865,695</td><td>$ 1,727,674</td><td>$ (31,343)</td><td>$ 169,364</td><td>9.8%</td><td></td></tr><tr><td>Cost of Revenues</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$ 266,131</td><td>$ 260,826</td><td>$ —</td><td>$ 5,305</td><td>2.0%</td><td></td></tr><tr><td>International site leasing</td><td>106,165</td><td>98,701</td><td>(10,795)</td><td>18,259</td><td>18.5%</td><td></td></tr><tr><td>Site development</td><td>96,499</td><td>86,785</td><td>—</td><td>9,714</td><td>11.2%</td><td></td></tr><tr><td>Total</td><td>$ 468,795</td><td>$ 446,312</td><td>$ (10,795)</td><td>$ 33,278</td><td>7.5%</td><td></td></tr><tr><td>Operating Profit</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$ 1,133,964</td><td>$ 1,047,563</td><td>$ —</td><td>$ 86,401</td><td>8.2%</td><td></td></tr><tr><td>International site leasing</td><td>234,174</td><td>216,083</td><td>(20,548)</td><td>38,639</td><td>17.9%</td><td></td></tr><tr><td>Site development</td><td>28,762</td><td>17,716</td><td>—</td><td>11,046</td><td>62.4%</td><td></td></tr></table>

## Revenues

Domestic site leasing revenues increased $91.7 million for the year ended December 31, 2018, as compared to the prior year, primarily due to (1) revenues from 462 towers acquired and 82 towers built since January 1, 2017 and (2) organic site leasing growth, primarily from monetary lease amendments for additional equipment added to our towers as well as new leases and contractual rent escalators, partially offset by lease non-renewals primarily by MetroPCS, Leap, Clearwire, and iDEN.

International site leasing revenues increased $25.6 million for the year ended December 31, 2018, as compared to the prior year. On a constant currency basis, international site leasing revenues increased $56.9 million. These changes were primarily due to (1) revenues from 2,279 towers acquired and 795 towers built since January 1, 2017, (2) organic site leasing growth from new leases, amendments, and contractual escalators, and (3) an increase in reimbursable pass-through expenses. Site leasing revenue in Brazil represented 12.7% of total site leasing revenue for the period. No other individual international market represented more than 3% of our total site leasing revenue.

Site development revenues increased $20.8 million for the year ended December 31, 2018, as compared to prior year, as a result of increased carrier activity.

## Operating Profit

Domestic site leasing segment operating profit increased $86.4 million for the year ended December 31, 2018, as compared to the prior year, primarily due to additional profit generated by (1) towers acquired and built since January 1, 2017 and organic site leasing growth as noted above, (2) continued control of our site leasing cost of revenue, and (3) the positive impact of our ground lease purchase program.

International site leasing segment operating profit increased $18.1 million for the year ended December 31, 2018, as compared to the prior year. On a constant currency basis, international site leasing segment operating profit increased $38.6 million. These changes were primarily due to additional profit generated by (1) towers acquired and built since January 1, 2017 and organic site leasing growth as noted above, (2) continued control of our site leasing cost of revenue, and (3) the positive impact of our ground lease purchase program.



Site development segment operating profit increased $11.0 million for the year ended December 31, 2018, as compared to the prior year, primarily due to an increase in revenue from increased carrier activity as well as a change in the mix of work performed.

## Selling, General, and Administrative Expenses:

<table><tr><td rowspan="3"></td><td colspan="4">For the year ended</td><td rowspan="3">Constant Currency Change</td><td rowspan="3">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td><td rowspan="2">Foreign Currency Impact</td><td rowspan="2">Constant Currency Change</td></tr><tr><td>2018</td><td>2017</td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$     72,879</td><td>$     67,263</td><td>$      —</td><td>$     5,616</td><td>8.3%</td><td></td></tr><tr><td>International site leasing</td><td>27,082</td><td>24,320</td><td>(2,513)</td><td>5,275</td><td>21.7%</td><td></td></tr><tr><td>Total site leasing</td><td>$     99,961</td><td>$     91,583</td><td>$      (2,513)</td><td>$     10,891</td><td>11.9%</td><td></td></tr><tr><td>Site development</td><td>16,215</td><td>15,433</td><td>—</td><td>782</td><td>5.1%</td><td></td></tr><tr><td>Not identified by segment</td><td>26,350</td><td>23,681</td><td>—</td><td>2,669</td><td>11.3%</td><td></td></tr><tr><td>Total</td><td>$     142,526</td><td>$     130,697</td><td>$      (2,513)</td><td>$     14,342</td><td>11.0%</td><td></td></tr></table>

Selling, general, and administrative expenses increased $11.8 million for the year ended December 31, 2018, as compared to the prior year. On a constant currency basis, selling, general, and administrative expenses increased $14.3 million. These changes were primarily as a result of increases in personnel, salaries, benefits, and other support-related costs and non-cash compensation costs, partially offset by a decrease in the provision for doubtful accounts.

## Acquisition Related Adjustments and Expenses:

<table><tr><td rowspan="3"></td><td colspan="4">For the year ended</td><td rowspan="3">Constant Currency Change</td><td rowspan="3">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td><td rowspan="2">Foreign Currency Impact</td></tr><tr><td>2018</td><td>2017</td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$     5,268</td><td>$     8,171</td><td>$      —</td><td>$      (2,903)</td><td>(35.5%)</td><td></td></tr><tr><td>International site leasing</td><td>5,693</td><td>4,196</td><td>(295)</td><td>1,792</td><td>42.7%</td><td></td></tr><tr><td>Total</td><td>$     10,961</td><td>$     12,367</td><td>$      (295)</td><td>$      (1,111)</td><td>(9.0%)</td><td></td></tr></table>

Acquisition related adjustments and expenses decreased $1.4 million for the year ended December 31, 2018, as compared to the prior year. On a constant currency basis, acquisition related adjustments and expenses decreased $1.1 million. These changes were primarily as a result of a decrease in third party acquisition and integration related costs compared to the prior year.

## Asset Impairment and Decommission Costs:

<table><tr><td rowspan="3"></td><td colspan="4">For the year ended</td><td rowspan="3">Constant Currency Change</td><td rowspan="3">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td><td rowspan="2">Foreign Currency Impact</td></tr><tr><td>2018</td><td>2017</td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$     18,857</td><td>$     29,523</td><td>$      —</td><td>$      (10,666)</td><td>(36.1%)</td><td></td></tr><tr><td>International site leasing</td><td>7,932</td><td>6,994</td><td>(277)</td><td>1,215</td><td>17.4%</td><td></td></tr><tr><td>Total site leasing</td><td>$     26,789</td><td>$     36,517</td><td>$      (277)</td><td>$      (9,451)</td><td>(25.9%)</td><td></td></tr><tr><td>Site Development</td><td>345</td><td>180</td><td>—</td><td>165</td><td>91.7%</td><td></td></tr><tr><td>Total</td><td>$     27,134</td><td>$     36,697</td><td>$      (277)</td><td>$      (9,286)</td><td>(25.3%)</td><td></td></tr></table>



Domestic site leasing asset impairment and decommission costs decreased $10.7 million for the year ended December 31, 2018, as compared to the prior year. This change was primarily as a result of a $10.2 million decrease in the impairment charge recorded on decommissioned towers and a $0.3 million decrease in impairment charges resulting from our regular analysis of whether the future cash flows from certain towers are adequate to recover the carrying value of the investment in those towers.

International site leasing asset impairment and decommission costs increased $0.9 million for the year ended December 31, 2018, as compared to the prior year. On a constant currency basis, international site leasing asset impairment and decommission costs increased $1.2 million. These changes were primarily as a result of a $1.6 million increase in the impairment charge recorded on decommissioned towers, partially offset by a $0.7 million decrease in impairment charges resulting from our regular analysis of whether the future cash flows from certain towers are adequate to recover the carrying value of the investment in those towers.

Depreciation, Accretion, and Amortization Expense:

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended</td><td rowspan="2">Foreign Currency Impact</td><td rowspan="2">Constant Currency Change</td><td rowspan="2">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td></tr><tr><td>2018</td><td>2017</td><td></td><td></td><td></td></tr><tr><td></td><td colspan="6">(in thousands)</td></tr><tr><td>Domestic site leasing</td><td>$ 511,823</td><td>$ 498,842</td><td>$</td><td>—</td><td>$ 12,981</td><td>2.6%</td></tr><tr><td>International site leasing</td><td>151,570</td><td>135,155</td><td></td><td>(13,914)</td><td>30,329</td><td>22.4%</td></tr><tr><td>Total site leasing</td><td>$ 663,393</td><td>$ 633,997</td><td>$</td><td>(13,914)</td><td>$ 43,310</td><td>6.8%</td></tr><tr><td>Site development</td><td>2,556</td><td>2,580</td><td></td><td>—</td><td>(24)</td><td>(0.9%)</td></tr><tr><td>Not identified by segment</td><td>6,164</td><td>6,523</td><td></td><td>—</td><td>(359)</td><td>(5.5%)</td></tr><tr><td>Total</td><td>$ 672,113</td><td>$ 643,100</td><td>$</td><td>(13,914)</td><td>$ 42,927</td><td>6.7%</td></tr></table>

Depreciation, accretion, and amortization expense increased $29.0 million for the year ended December 31, 2018, as compared to the prior year. On a constant currency basis, depreciation, accretion, and amortization expense increased $42.9 million. These changes were primarily due to additional domestic site leasing and international site leasing depreciation and amortization associated with an increase in the number of towers we acquired and built since January 1, 2017, partially offset by the impact of assets that became fully depreciated since the prior year period.

Operating Income (Expense):

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended</td><td rowspan="2">Foreign Currency Impact</td><td rowspan="2">Constant Currency Change</td><td rowspan="2">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td></tr><tr><td>2018</td><td>2017</td><td></td><td></td><td></td></tr><tr><td></td><td colspan="6">(in thousands)</td></tr><tr><td>Domestic site leasing</td><td>$ 525,137</td><td>$ 443,764</td><td>$</td><td>—</td><td>$ 81,373</td><td>18.3%</td></tr><tr><td>International site leasing</td><td>41,897</td><td>45,418</td><td></td><td>(3,549)</td><td>28</td><td>0.1%</td></tr><tr><td>Total site leasing</td><td>$ 567,034</td><td>$ 489,182</td><td>$</td><td>(3,549)</td><td>$ 81,401</td><td>16.6%</td></tr><tr><td>Site development</td><td>9,646</td><td>(477)</td><td></td><td>—</td><td>10,123</td><td>(2,122.2%)</td></tr><tr><td>Not identified by segment</td><td>(32,514)</td><td>(30,204)</td><td></td><td>—</td><td>(2,310)</td><td>7.6%</td></tr><tr><td>Total</td><td>$ 544,166</td><td>$ 458,501</td><td>$</td><td>(3,549)</td><td>$ 89,214</td><td>19.5%</td></tr></table>

Domestic site leasing operating income increased $81.4 million for the year ended December 31, 2018, as compared to the prior year, primarily due to higher segment operating profit and decreases in asset impairment and decommission costs and acquisition related adjustments and expenses, partially offset by increases in depreciation, accretion, and amortization expense and selling, general, and administrative expenses.



International site leasing operating income decreased $3.5 million for the year ended December 31, 2018, as compared to the prior year primarily due to the movement in foreign currency exchange rates.

Site development operating income increased $10.1 million for the year ended December 31, 2018, as compared to the prior year, primarily due to higher segment operating profit, partially offset by increases in selling, general, and administrative expenses and asset impairment and decommission costs.

## Other Income (Expense):

<table><tr><td rowspan="3"></td><td colspan="4">For the year ended</td><td colspan="2">Constant</td></tr><tr><td colspan="2">December 31,</td><td colspan="2">Foreign</td><td>Constant</td><td rowspan="2">Currency % Change</td></tr><tr><td>2018</td><td>2017</td><td colspan="2">Currency Impact</td><td>Currency Change</td></tr><tr><td></td><td colspan="6">(in thousands)</td></tr><tr><td>Interest income</td><td>$     6,731</td><td>$     11,337</td><td>$      (374)</td><td>$      (4,232)</td><td>(37.3%)</td><td></td></tr><tr><td>Interest expense</td><td>(376,217)</td><td>(323,749)</td><td>(6)</td><td>(52,462)</td><td>16.2%</td><td></td></tr><tr><td>Non-cash interest expense</td><td>(2,640)</td><td>(2,879)</td><td>—</td><td>239</td><td>(8.3%)</td><td></td></tr><tr><td>Amortization of deferred financing fees</td><td>(20,289)</td><td>(21,940)</td><td>—</td><td>1,651</td><td>(7.5%)</td><td></td></tr><tr><td>Loss from extinguishment of debt, net</td><td>(14,443)</td><td>(1,961)</td><td>—</td><td>(12,482)</td><td>636.5%</td><td></td></tr><tr><td>Other (expense) income, net</td><td>(85,624)</td><td>(2,418)</td><td>(81,181)</td><td>(2,025)</td><td>(32.0%)</td><td></td></tr><tr><td>Total</td><td>$      (492,482)</td><td>$      (341,610)</td><td>$      (81,561)</td><td>$      (69,311)</td><td>20.8%</td><td></td></tr></table>

Interest income decreased $4.6 million for the year ended December 31, 2018, as compared to the prior year. On a constant currency basis, interest income decreased $4.2 million. These changes were primarily due to a lower amount of interest bearing deposits held in Brazil and lower effective interest rates on those deposits as compared to the prior year.

Interest expense increased $52.5 million, on an actual and constant currency basis, for the year ended December 31, 2018, as compared to the prior year, due to a higher weighted average interest rate and higher average principal amount of cash-interest bearing debt outstanding as compared to the prior year.

Non-cash interest expense decreased $0.2 million for the year ended December 31, 2018, as compared to the prior year, primarily due to lower amounts of amortization of the discount related to the repayment of the 2014 Term Loan and 2015 Term Loan in April 2018, partially offset by higher amounts of amortization of the discount related to the issuance of the 2018 Term Loan in April 2018.

Amortization of deferred financing fees decreased $1.7 million for the year ended December 31, 2018, as compared to the prior year, primarily resulting from the repayment of the 2013-1C Tower Securities in March 2018, 2013-1D Tower Securities in March 2018, 2014 Term Loan in April 2018, and 2015 Term Loan in April 2018, partially offset by the issuance of the 2018-1C Tower Securities in March 2018 and the incurrence of the 2018 Term Loan in April 2018.

Loss from extinguishment of debt was $14.4 million for the year ended December 31, 2018 due to the write-off of the unamortized financing fees associated with the repayment of the 2013-1C Tower Securities and 2013-1D Tower Securities in March 2018, as well as the write-off of the original issuance discount and unamortized financing fees associated with the repayment of the 2014 Term Loan and 2015 Term Loan in April 2018. Loss from extinguishment of debt was $2.0 million for the year ended December 31, 2017 due to the write-off of unamortized financing costs associated with the repayment of the 2012-1C Tower Securities in April 2017.

Other (expense) income, net includes an $89.1 million loss on the remeasurement of U.S. dollar denominated intercompany loans with a Brazilian subsidiary for the year ended December 31, 2018, while the prior year period included an $8.8 million loss.



## Provision for Income Taxes:

<table><tr><td rowspan="2"></td><td colspan="3">For the year ended</td><td rowspan="2">Foreign Currency Impact</td><td rowspan="2">Constant Currency Change</td><td rowspan="2">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td></tr><tr><td></td><td>2018</td><td>2017</td><td></td><td></td><td></td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Provision for income taxes</td><td>$ (4,233)</td><td>$ (13,237)</td><td>$ 31,608</td><td>$ (22,604)</td><td>170.8%</td><td></td></tr></table>

Provision for income taxes decreased $9.0 million for the year ended December 31, 2018, as compared to the prior year. On a constant currency basis, provision for income taxes increased $22.6 million. These changes were primarily due to a $12.0 million Brazilian deferred tax provision and a $6.2 million accrual for deferred taxes related to the partial reversal of the permanent reinvestment on foreign earnings.

## Net Income:

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended</td><td rowspan="3">Foreign Currency Impact</td><td rowspan="3">Constant Currency Change</td><td rowspan="3">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td><td></td></tr><tr><td>2018</td><td>2017</td><td></td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Net income</td><td>$ 47,451</td><td>$ 103,654</td><td>$ (53,502)</td><td>$ (2,701)</td><td>(2.4%)</td><td></td></tr></table>

Net income decreased $56.2 million for the year ended December 31, 2018, as compared to the prior year. This change was primarily due to fluctuations in foreign currency exchange rates including changes recorded on the remeasurement of the U.S. dollar denominated intercompany loans with a Brazilian subsidiary (net of the tax impact), an increase in interest expense, and an increase in the loss from extinguishment of debt, partially offset by an increase in operating income.

## Year Ended 2017 Compared to Year Ended 2016

## Revenues and Segment Operating Profit:

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended</td><td rowspan="3">Foreign Currency Impact</td><td rowspan="3">Constant Currency Change</td><td rowspan="3">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td><td></td></tr><tr><td>2017</td><td>2016</td><td></td></tr><tr><td>Revenues</td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$ 1,308,389</td><td>$ 1,273,866</td><td>$ —</td><td>$ 34,523</td><td>2.7%</td><td></td></tr><tr><td>International site leasing</td><td>314,784</td><td>264,204</td><td>17,423</td><td>33,157</td><td>12.5%</td><td></td></tr><tr><td>Site development</td><td>104,501</td><td>95,055</td><td>—</td><td>9,446</td><td>9.9%</td><td></td></tr><tr><td>Total</td><td>$ 1,727,674</td><td>$ 1,633,125</td><td>$ 17,423</td><td>$ 77,126</td><td>4.7%</td><td></td></tr><tr><td>Cost of Revenues</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$ 260,826</td><td>$ 260,941</td><td>$ —</td><td>$ (115)</td><td>(0.0%)</td><td></td></tr><tr><td>International site leasing</td><td>98,701</td><td>81,274</td><td>6,100</td><td>11,327</td><td>13.9%</td><td></td></tr><tr><td>Site development</td><td>86,785</td><td>78,682</td><td>—</td><td>8,103</td><td>10.3%</td><td></td></tr><tr><td>Total</td><td>$ 446,312</td><td>$ 420,897</td><td>$ 6,100</td><td>$ 19,315</td><td>4.6%</td><td></td></tr><tr><td>Operating Profit</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$ 1,047,563</td><td>$ 1,012,925</td><td>$ —</td><td>$ 34,638</td><td>3.4%</td><td></td></tr><tr><td>International site leasing</td><td>216,083</td><td>182,930</td><td>11,323</td><td>21,830</td><td>11.9%</td><td></td></tr><tr><td>Site development</td><td>17,716</td><td>16,373</td><td>—</td><td>1,343</td><td>8.2%</td><td></td></tr></table>



## Revenues

Domestic site leasing revenues increased $34.5 million for the year ended December 31, 2017, as compared to the prior year, due largely to (1) revenues from 438 towers acquired and 97 towers built since January 1, 2016 and (2) organic site leasing growth, primarily from monetary lease amendments for additional equipment added to our towers as well as new leases and contractual rent escalators, partially offset by lease non-renewals primarily by MetroPCS, Clearwire, and Cricket.

International site leasing revenues increased $50.6 million for the year ended December 31, 2017, as compared to the prior year. On a constant currency basis, international site leasing revenues increased $33.2 million. These changes were primarily due to (1) revenues from 1,518 towers acquired and 739 towers built since January 1, 2016, (2) organic site leasing growth from new leases and contractual escalators, and (3) an increase in reimbursable pass-through expenses. Site leasing revenue in Brazil represented 13.4% of total site leasing revenue for the period. No other individual international market represented more than 3% of our total site leasing revenue.

Site development revenues increased $9.4 million for the year ended December 31, 2017, as compared to the prior year, as a result of increased carrier activity.

## Operating Profit

Domestic site leasing segment operating profit increased $34.6 million for the year ended December 31, 2017, as compared to the prior year, primarily due to additional profit generated by (1) towers acquired and built since January 1, 2016 and organic site leasing growth as noted above, (2) continued control of our site leasing cost of revenue, and (3) the positive impact of our ground lease purchase program.

International site leasing segment operating profit increased $33.2 million for the year ended December 31, 2017, as compared to the prior year. On a constant currency basis, international site leasing segment operating profit increased $21.8 million. These changes were primarily due to towers acquired and built since January 1, 2016 and organic site leasing growth as noted above, partially offset by increases in ground rent and repairs and maintenance costs.

Site development segment operating profit increased $1.3 million for the year ended December 31, 2017, as compared to the prior year, primarily due to an increase in revenue from increased carrier activity partially offset by lower margins due to the type of work performed.

## Selling, General, and Administrative Expenses:

<table><tr><td rowspan="3"></td><td colspan="4">For the year ended</td><td colspan="3">Constant</td></tr><tr><td colspan="2">December 31,</td><td colspan="2">Foreign</td><td>Constant</td><td colspan="2">Currency</td></tr><tr><td>2017</td><td>2016</td><td colspan="2">Currency Impact</td><td>Currency Change</td><td colspan="2">% Change</td></tr><tr><td></td><td colspan="7">(in thousands)</td></tr><tr><td>Domestic site leasing</td><td>$     67,263</td><td>$     72,701</td><td>$      —</td><td>$      (5,438)</td><td colspan="3">(7.5%)</td></tr><tr><td>International site leasing</td><td>24,320</td><td>35,897</td><td>1,005</td><td>(12,582)</td><td colspan="3">(35.1%)</td></tr><tr><td>Total site leasing</td><td>$     91,583</td><td>$     108,598</td><td>$     1,005</td><td>$      (18,020)</td><td colspan="3">(16.6%)</td></tr><tr><td>Site development</td><td>15,433</td><td>13,039</td><td>—</td><td>2,394</td><td colspan="3">18.4%</td></tr><tr><td>Not identified by segment</td><td>23,681</td><td>21,712</td><td>—</td><td>1,969</td><td colspan="3">9.1%</td></tr><tr><td>Total</td><td>$     130,697</td><td>$     143,349</td><td>$     1,005</td><td>$      (13,657)</td><td colspan="3">(9.5%)</td></tr></table>

Selling, general, and administrative expenses decreased $12.7 million for the year ended December 31, 2017, as compared to the prior year. On a constant currency basis, selling, general, and administrative expenses decreased $13.7 million. These changes were primarily as a result of decreases in the provision for doubtful accounts, which included the $16.5 million Oi reserve recorded in the second quarter of 2016, and REIT conversion expenses, partially offset by increases in non-cash compensation, personnel, salaries, benefits, and other support costs.



## Acquisition Related Adjustments and Expenses:

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended</td><td rowspan="3">Foreign Currency Impact</td><td rowspan="3">Constant Currency Change</td><td rowspan="3">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td><td></td></tr><tr><td>2017</td><td>2016</td><td></td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$     8,171</td><td>$     6,233</td><td>$      —</td><td>$     1,938</td><td>31.1%</td><td></td></tr><tr><td>International site leasing</td><td>4,196</td><td>6,907</td><td>211</td><td>(2,922)</td><td>(42.3%)</td><td></td></tr><tr><td>Total</td><td>$     12,367</td><td>$     13,140</td><td>$     211</td><td>$      (984)</td><td>(7.5%)</td><td></td></tr></table>

Acquisition related adjustments and expenses decreased $0.8 million for the year ended December 31, 2017, as compared to the prior year. On a constant currency basis, acquisition related adjustments and expenses decreased $1.0 million. These changes were primarily as a result of changes in our estimated pre-acquisition contingencies as compared to the prior year period and a reduction in third party acquisition costs expensed in 2017 as compared to 2016.

## Asset Impairment and Decommission Costs:

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended</td><td rowspan="3">Foreign Currency Impact</td><td rowspan="3">Constant Currency Change</td><td rowspan="3">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td><td></td></tr><tr><td>2017</td><td>2016</td><td></td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$     29,523</td><td>$     26,073</td><td>$      —</td><td>$     3,450</td><td>13.2%</td><td></td></tr><tr><td>International site leasing</td><td>6,994</td><td>1,824</td><td>318</td><td>4,852</td><td>266.0%</td><td></td></tr><tr><td>Total site leasing</td><td>$     36,517</td><td>$     27,897</td><td>$     318</td><td>$     8,302</td><td>29.8%</td><td></td></tr><tr><td>Site development</td><td>180</td><td>—</td><td>—</td><td>180</td><td>—%</td><td></td></tr><tr><td>Not identified by segment</td><td>—</td><td>2,345</td><td>—</td><td>(2,345)</td><td>—%</td><td></td></tr><tr><td>Total</td><td>$     36,697</td><td>$     30,242</td><td>$     318</td><td>$     6,137</td><td>20.3%</td><td></td></tr></table>

Asset impairment and decommission costs increased $6.5 million for the year ended December 31, 2017, as compared to the prior year. On a constant currency basis, asset impairment and decommission costs increased $6.1 million. These changes were primarily as a result of an $8.9 million gain on the sale of fiber assets recorded in the prior year period, partially offset by a $2.3 million decrease in write-off and disposal costs related to our former corporate headquarters building.

## Depreciation, Accretion, and Amortization Expense:

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended</td><td rowspan="3">Foreign Currency Impact</td><td rowspan="3">Constant Currency Change</td><td rowspan="3">Constant Currency % Change</td></tr><tr><td colspan="2">December 31,</td><td></td></tr><tr><td>2017</td><td>2016</td><td></td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Domestic site leasing</td><td>$     498,842</td><td>$     509,108</td><td>$      —</td><td>$      (10,266)</td><td>(2.0%)</td><td></td></tr><tr><td>International site leasing</td><td>135,155</td><td>119,466</td><td>7,457</td><td>8,232</td><td>6.9%</td><td></td></tr><tr><td>Total site leasing</td><td>$     633,997</td><td>$     628,574</td><td>$     7,457</td><td>$      (2,034)</td><td>(0.3%)</td><td></td></tr><tr><td>Site development</td><td>2,580</td><td>3,402</td><td>—</td><td>(822)</td><td>(24.2%)</td><td></td></tr><tr><td>Not identified by segment</td><td>6,523</td><td>6,213</td><td>—</td><td>310</td><td>5.0%</td><td></td></tr><tr><td>Total</td><td>$     643,100</td><td>$     638,189</td><td>$     7,457</td><td>$      (2,546)</td><td>(0.4%)</td><td></td></tr></table>



Depreciation, accretion, and amortization expense increased $4.9 million for the year ended December 31, 2017, as compared to the prior year. On a constant currency basis, depreciation, accretion, and amortization expense decreased $2.5 million. These changes were primarily due to a decrease in domestic site leasing depreciation associated with assets that became fully depreciated since the prior year period, partially offset by additional international site leasing depreciation associated with an increase in the number of towers we acquired and built since January 1, 2016.

## Operating Income (Loss):

<table><tr><td rowspan="3"></td><td colspan="4">For the year ended</td><td colspan="3">Constant</td></tr><tr><td colspan="2">December 31,</td><td colspan="2">Foreign</td><td>Constant</td><td colspan="2">Currency</td></tr><tr><td>2017</td><td>2016</td><td colspan="2">Currency Impact</td><td>Currency Change</td><td colspan="2">% Change</td></tr><tr><td></td><td colspan="7">(in thousands)</td></tr><tr><td>Domestic site leasing</td><td>$ 443,764</td><td>$ 398,810</td><td>$</td><td>—</td><td>$ 44,954</td><td colspan="2">11.3%</td></tr><tr><td>International site leasing</td><td>45,418</td><td>18,836</td><td>2,332</td><td>24,250</td><td colspan="2">128.7%</td><td></td></tr><tr><td>Total site leasing</td><td>$ 489,182</td><td>$ 417,646</td><td>$ 2,332</td><td>$ 69,204</td><td colspan="2">16.6%</td><td></td></tr><tr><td>Site development</td><td>(477)</td><td>(68)</td><td>—</td><td>(409)</td><td colspan="2">601.5%</td><td></td></tr><tr><td>Not identified by segment</td><td>(30,204)</td><td>(30,270)</td><td>—</td><td>66</td><td colspan="2">(0.2%)</td><td></td></tr><tr><td>Total</td><td>$ 458,501</td><td>$ 387,308</td><td>$ 2,332</td><td>$ 68,861</td><td colspan="2">17.8%</td><td></td></tr></table>

Domestic site leasing operating income increased $45.0 million for the year ended December 31, 2017, as compared to the prior year, primarily due to higher segment operating profit and decreases in depreciation, accretion, and amortization expense, and selling, general, and administrative expenses, partially offset by increases in asset impairment, decommission costs, and acquisition related adjustments and expenses.

International site leasing operating income increased $26.6 million for the year ended December 31, 2017, as compared to the prior year. On a constant currency basis, international site leasing operating income increased $24.3 million. These changes were primarily due to higher segment operating profit and decreases in selling, general, and administrative expenses primarily resulting from the $16.5 million Oi reserve and acquisition related adjustments and expenses, partially offset by increases in depreciation, accretion, and amortization expenses, and asset impairment and decommission costs.

Site development operating income decreased $0.4 million for the year ended December 31, 2017, as compared to the prior year, primarily due to increases in selling, general, and administrative expenses and asset impairment and decommission costs, partially offset by an increase in segment operating profit and a decrease in depreciation, accretion, and amortization expense.

## Other Income (Expense):

<table><tr><td rowspan="3"></td><td colspan="4">For the year ended</td><td colspan="3">Constant</td></tr><tr><td colspan="2">December 31,</td><td colspan="2">Foreign</td><td>Constant</td><td colspan="2">Currency</td></tr><tr><td>2017</td><td>2016</td><td colspan="2">Currency Impact</td><td>Currency Change</td><td colspan="2">% Change</td></tr><tr><td></td><td colspan="7">(in thousands)</td></tr><tr><td>Interest income</td><td>$ 11,337</td><td>$ 10,928</td><td>$</td><td>711</td><td>$ (302)</td><td colspan="2">(2.8%)</td></tr><tr><td>Interest expense</td><td>(323,749)</td><td>(329,171)</td><td></td><td>(2)</td><td>5,424</td><td colspan="2">(1.6%)</td></tr><tr><td>Non-cash interest expense</td><td>(2,879)</td><td>(2,203)</td><td></td><td>—</td><td>(676)</td><td colspan="2">30.7%</td></tr><tr><td>Amortization of deferred financing fees</td><td>(21,940)</td><td>(21,136)</td><td></td><td>—</td><td>(804)</td><td colspan="2">3.8%</td></tr><tr><td>Loss from extinguishment of debt, net</td><td>(1,961)</td><td>(52,701)</td><td></td><td>—</td><td>50,740</td><td colspan="2">(96.3%)</td></tr><tr><td>Other (expense) income, net</td><td>(2,418)</td><td>94,278</td><td></td><td>(99,624)</td><td>2,928</td><td colspan="2">3.1%</td></tr><tr><td>Total</td><td>$ (341,610)</td><td>$ (300,005)</td><td>$</td><td>(98,915)</td><td>$ 57,310</td><td colspan="2">(19.1%)</td></tr></table>



Interest income increased $0.4 million for the year ended December 31, 2017, as compared to the prior year. On a constant currency basis, interest income decreased $0.3 million. These changes were primarily due to a lower average interest rate offset by a higher amount of interest bearing deposits held in Brazil as compared to the prior year.

Interest expense decreased $5.4 million, on an actual and constant currency basis, for the year ended December 31, 2017, as compared to the prior year, due to the lower weighted average interest rate on debt, partially offset by a higher average principal amount of cash-interest bearing debt outstanding as compared to the prior year. The decrease primarily resulted from the repayment of the 2010-2C Tower Securities in July 2016, the 5.75% Senior Notes in August 2016, the 5.625% Senior Notes in October 2016, and the 2012-1C Tower Securities in April 2017, partially offset by the issuance of the 2016-1C Tower Securities in July 2016, 2016 Senior Notes in August 2016, 2017-1C Tower Securities in April 2017, 2017 Senior Notes in October 2017, and a higher average balance outstanding on the Revolving Credit Facility in 2017.

Non-cash interest expense increased $0.7 million for the year ended December 31, 2017, as compared to the prior year, primarily due to the amortization of the discount related to the 2016 Senior Notes issued in August 2016.

Amortization of deferred financing fees increased $0.8 million for the year ended December 31, 2017, as compared to the prior year, primarily resulting from the issuance of the 2017-1C Tower Securities in April 2017, the 2016-1C Tower Securities in July 2016, the 2016 Senior Notes in August 2016, and the 2017 Senior Notes in October 2017, partially offset by the repayment of the 2010-2C Tower Securities in July 2016, the 2012-1C Tower Securities in April 2017, the 5.75% Senior Notes in August 2016, and the 5.625% Senior Notes in October 2016.

Loss from extinguishment of debt was $2.0 million for the year ended December 31, 2017 due to the write-off of unamortized financing costs associated with the repayment of the 2012-1C Tower Securities in April 2017. Loss from the extinguishment of debt was $52.7 million for the year ended December 31, 2016 due to the payment of a $25.8 million call premium and the write-off of $7.7 million in deferred financing fees on the redemption of the 5.75% Senior Notes, the payment of a $14.1 million call premium and the write-off of $4.1 million in deferred financing fees on the redemption of the 5.625% Senior Notes, and the write-off of $1.0 million in deferred financing fees related to redemption of the 2010-2C Tower Securities.

Other income (expense), net includes an $8.8 million loss on the remeasurement of a U.S. dollar denominated intercompany loan with a Brazilian subsidiary for the year ended December 31, 2017, while the prior year included a $90.0 million gain.

## Provision for Income Taxes:

<table><tr><td rowspan="2"></td><td colspan="3">For the year ended</td><td></td><td></td><td></td><td>Constant</td></tr><tr><td colspan="2">December 31,</td><td></td><td>Foreign</td><td>Constant</td><td>Currency</td><td>% Change</td></tr><tr><td></td><td>2017</td><td>2016</td><td></td><td>Currency Impact</td><td>Currency Change</td><td></td><td></td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td><td></td></tr><tr><td>Provision for income taxes</td><td>$ (13,237)</td><td>$ (11,065)</td><td>$ (76)</td><td>$ (2,096)</td><td>18.9%</td><td></td><td></td></tr></table>

Provision for income taxes increased $2.2 million for the year ended December 31, 2017, as compared to the prior year. On a constant currency basis, provision for income taxes increased $2.1 million. These changes were primarily due to an increase in state tax provisions from becoming a taxpayer in additional jurisdictions.

## Net Income:

<table><tr><td rowspan="2"></td><td colspan="3">For the year ended</td><td></td><td></td><td></td><td>Constant</td></tr><tr><td colspan="2">December 31,</td><td></td><td>Foreign</td><td>Constant</td><td>Currency</td><td>% Change</td></tr><tr><td></td><td>2017</td><td>2016</td><td></td><td>Currency Impact</td><td>Currency Change</td><td></td><td></td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td><td></td></tr><tr><td>Net income</td><td>$ 103,654</td><td>$ 76,238</td><td>$ (96,507)</td><td>$ 123,923</td><td>162.5%</td><td></td><td></td></tr></table>

Net income increased $27.4 million for the year ended December 31, 2017, as compared to the prior year. On a constant currency basis, net income increased $123.9 million. These changes were primarily due to an increase in operating income, decreases



in interest expense and loss from extinguishment of debt, net, partially offset by fluctuations in our foreign currency exchange rates including changes recorded on the remeasurement of the intercompany loans.

## NON-GAAP FINANCIAL MEASURES

This report contains information regarding a non-GAAP measure, Adjusted EBITDA. We have provided below a description of Adjusted EBITDA, a reconciliation of Adjusted EBITDA to its most directly comparable GAAP measure and an explanation as to why management utilizes this measure. This report also presents our financial results and other financial metrics after eliminating the impact of changes in foreign currency exchange rates and the Oi reserve recorded in the second quarter of 2016. We believe that providing these financial results and metrics on a constant currency basis, which are non-GAAP measures, gives management and investors the ability to evaluate the performance of our business without the impact of foreign currency exchange rate fluctuations. We eliminate the impact of changes in foreign currency exchange rates by dividing the current period's financial results by the average monthly exchange rates of the prior year period, as well as by eliminating the impact of the remeasurement of our intercompany loans. In addition, we believe that excluding the Oi reserve, which represents a $16.5 million one-time provision for doubtful accounts recorded in 2016, provides management and investors the ability to better analyze our core results without the impact of what we believe is a non-recurring event.

## Adjusted EBITDA

We define Adjusted EBITDA as net income excluding the impact of non-cash straight-line leasing revenue, non-cash straight-line ground lease expense, non-cash compensation, net loss from extinguishment of debt, other income and expenses, acquisition related adjustments and expenses, asset impairment and decommission costs, interest income, interest expenses, depreciation, accretion, and amortization, and provision for or benefit from taxes.

We believe that Adjusted EBITDA is useful to investors or other interested parties in evaluating our financial performance. Adjusted EBITDA is the primary measure used by management (1) to evaluate the economic productivity of our operations and (2) for purposes of making decisions about allocating resources to, and assessing the performance of, our operations. Management believes that Adjusted EBITDA helps investors or other interested parties to meaningfully evaluate and compare the results of our operations (1) from period to period and (2) to our competitors, by excluding the impact of our capital structure (primarily interest charges from our outstanding debt) and asset base (primarily depreciation, amortization and accretion) from our financial results. Management also believes Adjusted EBITDA is frequently used by investors or other interested parties in the evaluation of REITs. In addition, Adjusted EBITDA is a component of the calculation that has been used by our lenders to determine compliance with certain covenants under our Senior Credit Agreement and the indentures relating to the 2014 Senior Notes, 2016 Senior Notes, and 2017 Senior Notes. Adjusted EBITDA should be considered only as a supplement to net income computed in accordance with GAAP as a measure of our performance.



<table><tr><td rowspan="2"></td><td colspan="3">For the year ended December 31,</td><td rowspan="2">Foreign Currency Impact</td><td rowspan="2">Constant Currency Change</td><td rowspan="2">Constant Currency % Change</td></tr><tr><td>2018</td><td>2017</td><td></td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Net income</td><td>$     47,451</td><td>$     103,654</td><td>$      (53,502)</td><td>$      (2,701)</td><td></td><td>(2.4%)</td></tr><tr><td>Non-cash straight-line leasing revenue</td><td>(18,643)</td><td>(16,419)</td><td>877</td><td>(3,101)</td><td></td><td>18.9%</td></tr><tr><td>Non-cash straight-line ground lease expense</td><td>26,212</td><td>30,850</td><td>1</td><td>(4,639)</td><td></td><td>(15.0%)</td></tr><tr><td>Non-cash compensation</td><td>42,327</td><td>38,249</td><td>(534)</td><td>4,612</td><td></td><td>12.1%</td></tr><tr><td>Loss from extinguishment of debt, net</td><td>14,443</td><td>1,961</td><td>—</td><td>12,482</td><td></td><td>636.5%</td></tr><tr><td>Other expense (income), net</td><td>85,624</td><td>2,418</td><td>81,181</td><td>2,025</td><td></td><td>32.0%</td></tr><tr><td>Acquisition related adjustments and expenses</td><td>10,961</td><td>12,367</td><td>(295)</td><td>(1,111)</td><td></td><td>(9.0%)</td></tr><tr><td>Asset impairment and decommission costs</td><td>27,134</td><td>36,697</td><td>(277)</td><td>(9,286)</td><td></td><td>(25.3%)</td></tr><tr><td>Interest income</td><td>(6,731)</td><td>(11,337)</td><td>374</td><td>4,232</td><td></td><td>(37.3%)</td></tr><tr><td>Interest expense (1)</td><td>399,146</td><td>348,568</td><td>6</td><td>50,572</td><td></td><td>14.5%</td></tr><tr><td>Depreciation, accretion, and amortization</td><td>672,113</td><td>643,100</td><td>(13,914)</td><td>42,927</td><td></td><td>6.7%</td></tr><tr><td>Provision for income taxes (2)</td><td>5,035</td><td>14,026</td><td>(31,611)</td><td>22,620</td><td></td><td>161.3%</td></tr><tr><td>Adjusted EBITDA</td><td>$     1,305,072</td><td>$     1,204,134</td><td>$      (17,694)</td><td>$     118,632</td><td></td><td>9.9%</td></tr></table>

<table><tr><td rowspan="2"></td><td colspan="3">For the year ended December 31,</td><td rowspan="2">Foreign Currency Impact</td><td rowspan="2">Constant Currency Change</td><td rowspan="2">Constant Currency % Change</td></tr><tr><td>2017</td><td>2016</td><td></td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Net income</td><td>$     103,654</td><td>$     76,238</td><td>$      (96,507)</td><td>$     123,923</td><td></td><td>162.5%</td></tr><tr><td>Non-cash straight-line leasing revenue</td><td>(16,419)</td><td>(31,650)</td><td>(1,110)</td><td>16,341</td><td></td><td>(51.6%)</td></tr><tr><td>Non-cash straight-line ground lease expense</td><td>30,850</td><td>34,708</td><td>140</td><td>(3,998)</td><td></td><td>(11.5%)</td></tr><tr><td>Non-cash compensation</td><td>38,249</td><td>32,915</td><td>129</td><td>5,205</td><td></td><td>15.8%</td></tr><tr><td>Loss from extinguishment of debt, net</td><td>1,961</td><td>52,701</td><td>—</td><td>(50,740)</td><td></td><td>(96.3%)</td></tr><tr><td>Other expense (income), net</td><td>2,418</td><td>(94,278)</td><td>99,624</td><td>(2,928)</td><td></td><td>(3.1%)</td></tr><tr><td>Acquisition related adjustments and expenses</td><td>12,367</td><td>13,140</td><td>211</td><td>(984)</td><td></td><td>(7.5%)</td></tr><tr><td>Asset impairment and decommission costs</td><td>36,697</td><td>30,242</td><td>318</td><td>6,137</td><td></td><td>20.3%</td></tr><tr><td>Interest income</td><td>(11,337)</td><td>(10,928)</td><td>(711)</td><td>302</td><td></td><td>(2.8%)</td></tr><tr><td>Interest expense (1)</td><td>348,568</td><td>352,510</td><td>2</td><td>(3,944)</td><td></td><td>(1.1%)</td></tr><tr><td>Depreciation, accretion, and amortization</td><td>643,100</td><td>638,189</td><td>7,457</td><td>(2,546)</td><td></td><td>(0.4%)</td></tr><tr><td>Provision for income taxes (2)</td><td>14,026</td><td>12,708</td><td>(45)</td><td>1,363</td><td></td><td>10.7%</td></tr><tr><td>Adjusted EBITDA</td><td>1,204,134</td><td>1,106,495</td><td>9,508</td><td>88,131</td><td></td><td>8.0%</td></tr><tr><td>Oi reserve</td><td>—</td><td>16,498</td><td>—</td><td>(16,498)</td><td></td><td>—%</td></tr><tr><td>Adjusted EBITDA excl. the Oi reserve</td><td>$     1,204,134</td><td>$     1,122,993</td><td>$     9,508</td><td>$     71,633</td><td></td><td>6.4%</td></tr></table>

(1) Interest expense includes interest expense, non-cash interest expense, and amortization of deferred financing fees.

(2) Provision for taxes includes $802, $789, and $1,643 of franchise and gross receipts taxes for the year ended 2018, 2017, and 2016, respectively, reflected in selling, general, and administrative expenses on the Consolidated Statement of Operations.



Adjusted EBITDA increased $100.9 million for the year ended December 31, 2018, as compared to the prior year. On a constant currency basis, adjusted EBITDA increased $118.6 million. These changes were primarily due to an increase in segment operating profit, partially offset by an increase in selling, general, and administrative expenses.

Adjusted EBITDA increased $81.1 million for the year ended December 31, 2017, as compared to the prior year. On a constant currency basis, adjusted EBITDA, excluding the Oi reserve, increased $71.6 million. These changes were primarily due to an increase in segment operating profit, partially offset by an increase in selling, general, and administrative expenses.

## LIQUIDITY AND CAPITAL RESOURCES

SBAC is a holding company with no business operations of its own. SBAC’s only significant asset is 100% of the outstanding capital stock of SBA Telecommunications, LLC (“Telecommunications”), which is also a holding company that owns equity interests in entities that directly or indirectly own all of our domestic and international towers and assets. We conduct all of our business operations through Telecommunications’ subsidiaries. Accordingly, our only source of cash to pay our obligations, other than financings, is distributions with respect to our ownership interest in our subsidiaries from the net earnings and cash flow generated by these subsidiaries.

A summary of our cash flows is as follows:

<table><tr><td rowspan="2"></td><td colspan="4">For the year ended December 31,</td></tr><tr><td>2018</td><td colspan="2">2017</td><td>2016</td></tr><tr><td>Summary cash flow information</td><td></td><td colspan="3">(in thousands)</td></tr><tr><td>Cash provided by operating activities</td><td>$     850,618</td><td>$     818,470</td><td>$     742,525</td><td></td></tr><tr><td>Cash used in investing activities</td><td>(618,347)</td><td>(605,107)</td><td>(428,235)</td><td></td></tr><tr><td>Cash used in financing activities</td><td>(148,537)</td><td>(294,574)</td><td>(288,557)</td><td></td></tr><tr><td>Change in cash, cash equivalents, and restricted cash</td><td>83,734</td><td>(81,211)</td><td>25,733</td><td></td></tr><tr><td>Effect of exchange rate changes on cash, cash equiv., and restricted cash</td><td>(9,729)</td><td>(464)</td><td>13,618</td><td></td></tr><tr><td>Cash, cash equiv., and rest. cash, beginning of year</td><td>104,295</td><td>185,970</td><td>146,619</td><td></td></tr><tr><td>Cash, cash equiv., and rest. cash, end of year</td><td>$     178,300</td><td>$     104,295</td><td>$     185,970</td><td></td></tr></table>

## Operating Activities

Cash provided by operating activities was $850.6 million for the year ended December 31, 2018 as compared to $818.5 million for the year ended December 31, 2017. The increase was primarily due to an increase in segment operating profit, partially offset by an increase in cash interest payments, an increase in selling, general, and administrative expenses, an increase in cash outflows associated with working capital changes, and lower interest income earned on interest bearing deposits.

Cash provided by operating activities was $818.5 million for the year ended December 31, 2017 as compared to $742.5 million for the year ended December 31, 2016. The increase was primarily due to an increase in segment operating profit from the domestic site leasing, international site leasing, and site development operating segments, a decrease in selling, general, and administrative expenses, and a decrease in interest payments as compared to the prior year.



## Investing Activities

A detail of our cash capital expenditures is as follows:

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td colspan="3">(in thousands)</td></tr><tr><td>Acquisitions of towers and related intangible assets (1)</td><td>$ 406,699</td><td>$ 392,902</td><td>$ 214,686</td></tr><tr><td>Construction and related costs on new builds</td><td>65,553</td><td>68,790</td><td>69,407</td></tr><tr><td>Augmentation and tower upgrades</td><td>49,372</td><td>43,028</td><td>38,123</td></tr><tr><td>Land buyouts and other assets (2)</td><td>45,130</td><td>48,645</td><td>62,149</td></tr><tr><td>Tower maintenance</td><td>29,640</td><td>30,091</td><td>27,718</td></tr><tr><td>General corporate</td><td>5,247</td><td>5,135</td><td>4,734</td></tr><tr><td>Total cash capital expenditures</td><td>$ 601,641</td><td>$ 588,591</td><td>$ 416,817</td></tr></table>

(1) The year ended December 31, 2017 excludes $63.3 million of acquisition costs funded through the issuance of 487,963 shares of Class A common stock.

(2) Excludes $24.3 million, $18.8 million, and $14.1 million spent to extend ground lease terms for the years ended December 31, 2018, 2017, and 2016, respectively.

Subsequent to December 31, 2018, we acquired 27 towers and related assets for $10.7 million in cash.

For 2019, we expect to incur non-discretionary cash capital expenditures associated with tower maintenance and general corporate expenditures of $32.0 million to $42.0 million and discretionary cash capital expenditures, based on current acquisition obligations, planned new tower construction, forecasted tower augmentations, and forecasted ground lease purchases, of $225.0 million to $245.0 million. We expect to fund these cash capital expenditures from cash on hand, cash flow from operations, and borrowings under the Revolving Credit Facility or new financings. The exact amount of our future cash capital expenditures will depend on a number of factors including amounts necessary to support our tower portfolio, our new tower build and acquisition programs, and our ground lease purchase program.

## Financing Activities

A detail of our financing activities is as follows:

<table><tr><td rowspan="3"></td><td colspan="3">For the year ended</td></tr><tr><td colspan="2">December 31, 2018</td><td>December 31, 2017</td></tr><tr><td colspan="3">(in thousands)</td></tr><tr><td>Borrowings under Revolving Credit Facility</td><td>$ 1,120,000</td><td>$ 525,000</td><td></td></tr><tr><td>Repayments under Revolving Credit Facility</td><td>(835,000)</td><td>(875,000)</td><td></td></tr><tr><td>Repayment of Term Loans</td><td>(1,947,000)</td><td>(20,000)</td><td></td></tr><tr><td>Proceeds from Term Loans, net of fees</td><td>2,377,218</td><td>—</td><td></td></tr><tr><td>Proceeds from Senior Notes, net of fees and original issue discount</td><td>—</td><td>741,108</td><td></td></tr><tr><td>Proceeds from issuance of Tower Securities, net of fees</td><td>631,466</td><td>749,764</td><td></td></tr><tr><td>Repayment of Tower Securities</td><td>(755,000)</td><td>(610,000)</td><td></td></tr><tr><td>Repurchase and retirement of common stock (1)</td><td>(795,581)</td><td>(854,534)</td><td></td></tr><tr><td>Other financing activities</td><td>55,360</td><td>49,088</td><td></td></tr><tr><td>Net cash used in financing activities</td><td>$ (148,537)</td><td>$ (294,574)</td><td></td></tr></table>



(1) On February 16, 2018, our Board of Directors authorized a $1.0 billion stock repurchase plan, replacing the plan authorized on January 12, 2017. During the year ended December 31, 2018, we repurchased 5.0 million shares of our Class A common stock under the stock repurchase plan authorized on February 16, 2018 for $795.5 million at a weighted average price per share of $159.87. During the year ended December 31, 2017, we repurchased 5.8 million shares of our Class A common stock under the previous stock repurchase plan dated June 4, 2015 for $850.0 million at a weighted average price per share of $146.17, and we further repurchased $4.4 million of our Class A common stock under the previous stock repurchase plan dated June 4, 2015. As of the date of this filing, we had $204.5 million of authorization remaining under the current stock repurchase plan. For additional information, refer to ITEM 5. Issuer Purchases of Equity Securities.

## Registration Statements

We have on file with the Commission a shelf registration statement on Form S-4 registering shares of Class A common stock that we may issue in connection with the acquisition of wireless communication towers or antenna sites and related assets or companies who own wireless communication towers, antenna sites, or related assets. During the year ended December 31, 2018, we did not issue any shares of Class A common stock under this registration statement. As of December 31, 2018, we had approximately 1.2 million shares of Class A common stock remaining under this shelf registration statement.

On March 5, 2018, we filed with the Commission an automatic shelf registration statement for well-known seasoned issuers on Form S-3ASR. This registration statement enables us to issue shares of our Class A common stock, preferred stock or debt securities either separately or represented by warrants, or depositary shares as well as units that include any of these securities. Under the rules governing automatic shelf registration statements, we will file a prospectus supplement and advise the Commission of the amount and type of securities each time we issue securities under this registration statement. No securities were issued under this registration statement through the date of this filing.

## Debt Instruments and Debt Service Requirements

## Senior Credit Agreement

On April 11, 2018, we amended and restated our Senior Credit Agreement to (1) issue a new $2.4 billion Term Loan, (2) increase the total commitments under the Revolving Credit Facility from $1.0 billion to $1.25 billion, (3) extend the maturity date of the Revolving Credit Facility to April 11, 2023, (4) lower the applicable interest rate margins and commitment fees under the Revolving Credit Facility, and (5) amend certain other terms and conditions under the Senior Credit Agreement. The proceeds from the new Term Loan were used to repay the outstanding balances on the 2014 Term Loan, 2015 Term Loan, and Revolving Credit Facility and for general corporate purposes. This transaction was accounted for as an extinguishment of the 2014 Term Loan and 2015 Term Loan.

## Terms of the Senior Credit Agreement

The Senior Credit Agreement, as amended, requires SBA Senior Finance II to maintain specific financial ratios, including (1) a ratio of Consolidated Net Debt to Annualized Borrower EBITDA not to exceed 6.5 times for any fiscal quarter, (2) a ratio of Consolidated Net Debt (calculated in accordance with the Senior Credit Agreement) to Annualized Borrower EBITDA for the most recently ended fiscal quarter not to exceed 6.5 times for 30 consecutive days and (3) a ratio of Annualized Borrower EBITDA to Annualized Cash Interest Expense (calculated in accordance with the Senior Credit Agreement) of not less than 2.0 times for any fiscal quarter. The Senior Credit Agreement contains customary affirmative and negative covenants that, among other things, limit the ability of SBA Senior Finance II and its subsidiaries to incur indebtedness, grant certain liens, make certain investments, enter into sale leaseback transactions, merge or consolidate, make certain restricted payments, enter into transactions with affiliates, and engage in certain asset dispositions, including a sale of all or substantially all of their property. The Senior Credit Agreement is also subject to customary events of default. Pursuant to the Second Amended and Restated Guarantee and Collateral Agreement, amounts borrowed under the Revolving Credit Facility, the Term Loans and certain hedging transactions that may be entered into by SBA Senior Finance II or the Subsidiary Guarantors (as defined in the Senior Credit Agreement) with lenders or their affiliates are secured by a first lien on the membership interests of SBA Telecommunications, LLC, SBA Senior Finance, LLC and SBA Senior Finance II and on substantially all of the assets (other than leasehold, easement and fee interests in real property) of SBA Senior Finance II and the Subsidiary Guarantors.

The Senior Credit Agreement, as amended, permits SBA Senior Finance II, without the consent of the other lenders, to request that one or more lenders provide SBA Senior Finance II with increases in the Revolving Credit Facility or additional term loans provided that after giving effect to the proposed increase in Revolving Credit Facility commitments or incremental term loans the ratio of Consolidated Net Debt to Annualized Borrower EBITDA would not exceed 6.5 times. SBA Senior Finance II’s ability to request



such increases in the Revolving Credit Facility or additional term loans is subject to its compliance with customary conditions set forth in the Senior Credit Agreement including compliance, on a pro forma basis, with the financial covenants and ratios set forth therein and, with respect to any additional term loan, an increase in the margin on existing term loans to the extent required by the terms of the Senior Credit Agreement. Upon SBA Senior Finance II’s request, each lender may decide, in its sole discretion, whether to increase all or a portion of its Revolving Credit Facility commitment or whether to provide SBA Senior Finance II with additional term loans and, if so, upon what terms.

## Revolving Credit Facility under the Senior Credit Agreement

As amended, the Revolving Credit Facility consists of a revolving loan under which up to $1.25 billion aggregate principal amount may be borrowed, repaid and redrawn, based upon specific financial ratios and subject to the satisfaction of other customary conditions to borrowing. Amounts borrowed under the Revolving Credit Facility accrue interest, at SBA Senior Finance II's election, at either (1) the Eurodollar Rate plus a margin that ranges from 112.5 basis points to 175.0 basis points or (2) the Base Rate plus a margin that ranges from 12.5 basis points to 75.0 basis points, in each case based on the ratio of Consolidated Net Debt to Annualized Borrower EBITDA, calculated in accordance with the Senior Credit Agreement. In addition, SBA Senior Finance II is required to pay a commitment fee of between 0.20% and 0.25% per annum on the amount of unused commitment. If not earlier terminated by SBA Senior Finance II, the Revolving Credit Facility will terminate on, and SBA Senior Finance II will repay all amounts outstanding on or before, April 11, 2023. The proceeds available under the Revolving Credit Facility may be used for general corporate purposes. SBA Senior Finance II may, from time to time, borrow from and repay the Revolving Credit Facility. Consequently, the amount outstanding under the Revolving Credit Facility at the end of the period may not be reflective of the total amounts outstanding during such period.

During the year ended December 31, 2018, we borrowed $1.1 billion and repaid $835.0 million of the outstanding balance under the Revolving Credit Facility. As of December 31, 2018, the balance outstanding under the Revolving Credit Facility was $325.0 million accruing interest at 4.38% per annum. In addition, SBA Senior Finance II was required to pay a commitment fee of 0.25% per annum on the amount of the unused commitment. As of December 31, 2018, SBA Senior Finance II was in compliance with the financial covenants contained in the Senior Credit Agreement.

Subsequent to December 31, 2018, we repaid $120.0 million of the outstanding balance under the Revolving Credit Facility. As of the date of this filing, $205.0 million was outstanding under the Revolving Credit Facility.

## Term Loans under the Senior Credit Agreement

## 2014 Term Loan

The 2014 Term Loan consisted of a senior secured term loan with an initial aggregate principal amount of $1.5 billion that was scheduled to mature on March 24, 2021. The 2014 Term Loan accrued interest, at SBA Senior Finance II's election, at either the Base Rate plus 125 basis points (with zero Base Rate floor) or the Eurodollar Rate plus 225 basis points (with a zero Eurodollar Rate floor). The 2014 Term Loan was originally issued at 99.75% of par value. Principal payments on the 2014 Term Loan commenced on September 30, 2014 and were being made in quarterly installments on the last day of each March, June, September, and December in an amount equal to $3.8 million. We incurred deferred financing fees of approximately $14.1 million in relation to this transaction which were being amortized through the maturity date.

During the three months ended March 31, 2018, we repaid $3.8 million of principal on the 2014 Term Loan. On April 11, 2018, we repaid the remaining $1,443.8 million outstanding principal balance of the 2014 Term Loan with proceeds from the 2018 Term Loan. In connection with the repayment, we expensed $5.8 million of net deferred financing fees and $1.7 million of discount related to the debt.

## 2015 Term Loan

The 2015 Term Loan consisted of a senior secured term loan with an initial aggregate principal amount of $500.0 million that was scheduled to mature on June 10, 2022. The 2015 Term Loan accrued interest, at SBA Senior Finance II's election at either the Base Rate plus 125 basis points (with a zero Base Rate floor) or the Eurodollar Rate plus 225 basis points (with a zero Eurodollar Rate floor). The 2015 Term Loan was originally issued at 99.0% of par value. Principal payments on the 2015 Term Loan commenced on September 30, 2015 and were being made in quarterly installments on the last day of each March, June, September, and December in an amount equal to $1.3 million. We incurred financing fees of approximately $5.5 million in relation to this transaction, which were being amortized through the maturity date.



During the three months ended March 31, 2018, we repaid $1.3 million of principal on the 2015 Term Loan. On April 11, 2018, we repaid the remaining $486.3 million outstanding principal balance of the 2015 Term Loan with proceeds from the 2018 Term Loan. In connection with the repayment, we expensed $3.2 million of net deferred financing fees and $3.1 million of discount related to the debt.

## 2018 Term Loan

On April 11, 2018, we, through our wholly owned subsidiary, SBA Senior Finance II LLC, obtained a new term loan (the "2018 Term Loan") under the amended and restated Senior Credit Agreement. The 2018 Term Loan consists of a senior secured term loan with an initial aggregate principal amount of $2.4 billion that matures on April 11, 2025. The 2018 Term Loan accrues interest, at SBA Senior Finance II's election at either the Base Rate plus 100 basis points (with a zero Base Rate floor) or the Eurodollar Rate plus 200 basis points (with a zero Eurodollar Rate floor). The 2018 Term Loan was issued at 99.75% of par value. As of December 31, 2018, the 2018 Term Loan was accruing interest at 4.53% per annum. Principal payments on the 2018 Term Loan commenced on September 30, 2018 and are being made in quarterly installments on the last day of each March, June, September, and December in an amount equal to $6.0 million. We incurred financing fees of approximately $16.8 million in relation to this transaction, which are being amortized through the maturity date. The proceeds from the 2018 Term Loan were used (1) to retire the outstanding $1.93 billion in aggregate principal amount of the 2014 Term Loan and 2015 Term Loan, (2) to pay down the existing outstanding balance under the Revolving Credit Facility, and (3) for general corporate purposes.

During the year ended December 31, 2018, we repaid an aggregate of $12.0 million of principal on the 2018 Term Loan. As of December 31, 2018, the 2018 Term Loan had a principal balance of $2.4 billion.

On February 1, 2019, we, through our wholly owned subsidiary, SBA Senior Finance II, LLC, entered into a four-year interest rate swap on a portion of our 2018 Term Loan. We swapped $1.2 billion of notional value accruing interest at one month LIBOR plus 200 basis points for a fixed rate of 4.495% per annum.

## Secured Tower Revenue Securities

## Tower Revenue Securities Terms

The mortgage loan underlying the 2013-2C Tower Securities, 2014 Tower Securities, 2015-1C Tower Securities, 2016-1C Tower Securities, 2017-1C Tower Securities, and 2018-1C Tower Securities (together the “Tower Securities”) will be paid from the operating cash flows from the aggregate 10,426 tower sites owned by the Borrowers. The sole asset of the Trust consists of a non-recourse mortgage loan made in favor of those entities that are borrowers on the mortgage loan (the “Borrowers”). The mortgage loan is secured by (1) mortgages, deeds of trust, and deeds to secure debt on a substantial portion of the tower sites, (2) a security interest in the tower sites and substantially all of the Borrowers’ personal property and fixtures, (3) the Borrowers’ rights under certain tenant leases, and (4) all of the proceeds of the foregoing. For each calendar month, SBA Network Management, Inc., an indirect subsidiary (“Network Management”), is entitled to receive a management fee equal to 4.5% of the Borrowers’ operating revenues for the immediately preceding calendar month.

The Borrowers may prepay any of the mortgage loan components, in whole or in part, with no prepayment consideration, (1) within twelve months (in the case of the component corresponding to the Secured Tower Revenue Securities Series 2014-1C, Secured Tower Revenue Securities Series 2015-1C, Secured Tower Revenue Securities Series 2016-1C, Secured Tower Revenue Securities Series 2017-1C, and Secured Tower Revenue Securities Series 2018-1C) or eighteen months (in the case of the components corresponding to the Secured Tower Revenue Securities Series 2013-2C and Secured Tower Revenue Securities Series 2014-2C) of the anticipated repayment date of such mortgage loan component, (2) with proceeds received as a result of any condemnation or casualty of any tower owned by the Borrowers or (3) during an amortization period. In all other circumstances, the Borrowers may prepay the mortgage loan, in whole or in part, upon payment of the applicable prepayment consideration. The prepayment consideration is determined based on the class of the Tower Securities to which the prepaid mortgage loan component corresponds and consists of an amount equal to the excess, if any, of (1) the present value associated with the portion of the principal balance being prepaid, calculated in accordance with the formula set forth in the mortgage loan agreement, on the date of prepayment of all future installments of principal and interest required to be paid from the date of prepayment to and including the first due date within twelve months (in the case of the component corresponding to the Secured Tower Revenue Securities Series 2014-1C, Secured Tower Revenue Securities Series 2015-1C, Secured Tower Revenue Securities Series 2016-1C, Secured Tower Revenue Securities Series 2017-1C, and Secured Tower Revenue Securities Series 2018-1C) or eighteen months (in the case of the components corresponding to the Secured Tower Revenue Securities Series 2013-2C and Secured Tower Revenue Securities Series 2014-2C) of the anticipated repayment date of such mortgage loan component over (2) that portion of the principal balance of such class prepaid on the date of such prepayment.



To the extent that the mortgage loan components corresponding to the Tower Securities are not fully repaid by their respective anticipated repayment dates, the interest rate of each such component will increase by the greater of (1) 5% and (2) the amount, if any, by which the sum of (x) the ten-year U.S. treasury rate plus (y) the credit-based spread for such component (as set forth in the mortgage loan agreement) plus (z) 5%, exceeds the original interest rate for such component.

Pursuant to the terms of the Tower Securities, all rents and other sums due on any of the towers owned by the Borrowers are directly deposited by the lessees into a controlled deposit account and are held by the indenture trustee. The monies held by the indenture trustee after the release date are classified as short-term restricted cash on the Consolidated Balance Sheets (see Note 4). However, if the Debt Service Coverage Ratio, defined as the net cash flow (as defined in the mortgage loan agreement) divided by the amount of interest on the mortgage loan, servicing fees and trustee fees that the Borrowers are required to pay over the succeeding twelve months, as of the end of any calendar quarter, falls to 1.30x or lower, then all cash flow in excess of amounts required to make debt service payments, to fund required reserves, to pay management fees and budgeted operating expenses and to make other payments required under the loan documents, referred to as “excess cash flow,” will be deposited into a reserve account instead of being released to the Borrowers. The funds in the reserve account will not be released to the Borrowers unless the Debt Service Coverage Ratio exceeds 1.30x for two consecutive calendar quarters. If the Debt Service Coverage Ratio falls below 1.15x as of the end of any calendar quarter, then an “amortization period” will commence and all funds on deposit in the reserve account will be applied to prepay the mortgage loan until such time that the Debt Service Coverage Ratio exceeds 1.15x for a calendar quarter. In addition, if any of the Tower Securities are not fully repaid by their respective anticipated repayment dates, the cash flow from the towers owned by the Borrowers will be trapped by the trustee for the Tower Securities and applied first to repay the interest, at the original interest rates, on the mortgage loan components underlying the Tower Securities, second to fund all reserve accounts and operating expenses associated with those towers, third to pay the management fees due to Network Management, fourth to repay principal of the Tower Securities and fifth to repay the additional interest discussed above. Furthermore, the advance rents reserve requirement states that the Borrowers are required to maintain an advance rents reserve at any time the monthly tenant Debt Service Coverage Ratio is equal to or less than 2:1 and for two calendar months after such coverage ratio again exceeds 2:1. The mortgage loan agreement, as amended, also includes covenants customary for mortgage loans subject to rated securitizations. Among other things, the Borrowers are prohibited from incurring other indebtedness for borrowed money or further encumbering their assets.

## 2012-1C Tower Securities

On August 9, 2012, we, through a New York common law trust (the “Trust”), issued $610.0 million of Secured Tower Revenue Securities Series 2012-1C (the “2012-1C Tower Securities”), which had an anticipated repayment date of December 11, 2017 and a final maturity date of December 9, 2042. The fixed interest rate of the 2012-1C Tower Securities was 2.933% per annum, payable monthly. We incurred deferred financing fees of $14.9 million in relation to this transaction, which were being amortized through the anticipated repayment date of the 2012-1C Tower Securities.

On April 17, 2017, we repaid in full the 2012-1C Tower Securities with proceeds from the 2017-1C Tower Securities. In connection with the repayment, we expensed $2.0 million of net deferred financing fees.

## 2013 Tower Securities

On April 18, 2013, we, through the Trust, issued $425.0 million of 2.240% Secured Tower Revenue Securities Series 2013-1C, which had an anticipated repayment date of April 10, 2018 and a final maturity date of April 9, 2043 (the "2013-1C Tower Securities"), $575.0 million of 3.722% Secured Tower Revenue Securities Series 2013-2C, which have an anticipated repayment date of April 11, 2023 and a final maturity date of April 9, 2048 (the "2013-2C Tower Securities"), and $330.0 million of 3.598% Secured Tower Revenue Securities Series 2013-1D, which had an anticipated repayment date of April 10, 2018 and a final maturity date of April 9, 2043 (the "2013-1D Tower Securities") (collectively the "2013 Tower Securities"). The aggregate $1.33 billion of 2013 Tower Securities had a blended interest rate of 3.218% per annum, payable monthly. We incurred financing fees of $25.5 million in relation to this transaction, which were being amortized through the anticipated repayment date of each of the 2013 Tower Securities.

On March 9, 2018, we repaid the entire aggregate principal amount of the 2013-1C Tower Securities and 2013-1D Tower Securities in connection with the issuance of the 2018-1C Tower Securities (as defined below).

The sole asset of the Trust consists of a non-recourse mortgage loan made in favor of the Borrowers.

## 2014 Tower Securities

On October 15, 2014, we, through the Trust, issued $920.0 million of 2.898% Secured Tower Revenue Securities Series 2014-1C, which have an anticipated repayment date of October 8, 2019 and a final maturity date of October 11, 2044 (the "2014-1C Tower



Securities”) and $620.0 million of 3.869% Secured Tower Revenue Securities Series 2014-2C, which have an anticipated repayment date of October 8, 2024 and a final maturity date of October 8, 2049 (the “2014-2C Tower Securities”) (collectively the “2014 Tower Securities”). The aggregate $1.54 billion of 2014 Tower Securities have a blended interest rate of 3.289% per annum, payable monthly. We incurred financing fees of $22.5 million in relation to this transaction, which are being amortized through the anticipated repayment date of each of the 2014 Tower Securities.

## 2015-1C Tower Securities

On October 14, 2015, we, through the Trust, issued $500.0 million of Secured Tower Revenue Securities Series 2015-1C, which have an anticipated repayment date of October 8, 2020 and a final maturity date of October 10, 2045 (the “2015-1C Tower Securities”). The fixed interest rate of the 2015-1C Tower Securities is 3.156% per annum, payable monthly. We incurred financing fees of $11.2 million in relation to this transaction, which are being amortized through the anticipated repayment date of the 2015-1C Tower Securities.

## 2016-1C Tower Securities

On July 7, 2016, we, through the Trust, issued $700.0 million of Secured Tower Revenue Securities Series 2016-1C, which have an anticipated repayment date of July 9, 2021 and a final maturity date of July 10, 2046 (the “2016-1C Tower Securities”). The fixed interest rate of the 2016-1C Tower Securities is 2.877% per annum, payable monthly. We incurred financing fees of $9.5 million in relation to this transaction, which are being amortized through the anticipated repayment date of the 2016-1C Tower Securities.

## 2017-1C Tower Securities

On April 17, 2017, we, through the Trust, issued $760.0 million of Secured Tower Revenue Securities Series 2017-1C, which have an anticipated repayment date of April 11, 2022 and a final maturity date of April 9, 2047 (the “2017-1C Tower Securities”). The fixed interest rate on the 2017-1C Tower Securities is 3.168% per annum, payable monthly. Net proceeds from this offering were used to prepay the entire $610.0 million aggregate principal amount, as well as accrued and unpaid interest, of the 2012-1C Tower Securities and for general corporate purposes. We incurred financing fees of $10.2 million in relation to this transaction, which are being amortized through the anticipated repayment date of the 2017-1C Tower Securities.

In addition, to satisfy certain risk retention requirements of Regulation RR promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), SBA Guarantor, LLC, a wholly owned subsidiary, purchased $40.0 million of Secured Tower Revenue Securities Series 2017-1R issued by the Trust, which have an anticipated repayment date of April 11, 2022 and a final maturity date of April 9, 2047 (the “2017-1R Tower Securities”). The fixed interest rate on the 2017-1R Tower Securities is 4.459% per annum, payable monthly. Principal and interest payments made on the 2017-1R Tower Securities eliminate in consolidation.

## 2018-1C Tower Securities

On March 9, 2018, we, through the Trust, issued $640.0 million of Secured Tower Revenue Securities Series 2018-1C, which have an anticipated repayment date of March 9, 2023 and a final maturity date of March 9, 2048 (the “2018-1C Tower Securities”). The fixed interest rate on the 2018-1C Tower Securities is 3.448% per annum, payable monthly. Net proceeds from this offering, in combination with borrowings under the Revolving Credit Facility, were used to repay the entire aggregate principal amount of the 2013-1C Tower Securities ($425.0 million) and 2013-1D Tower Securities ($330.0 million), as well as accrued and unpaid interest. We incurred financing fees of $8.5 million in relation to this transaction, which are being amortized through the anticipated repayment date of the 2018-1C Tower Securities.

In addition, to satisfy certain risk retention requirements of Regulation RR promulgated under the Exchange Act, SBA Guarantor, LLC, a wholly owned subsidiary, purchased $33.7 million of Secured Tower Revenue Securities Series 2018-1R issued by the Trust. These securities have an anticipated repayment date of March 9, 2023 and a final maturity date of March 9, 2048 (the “2018-1R Tower Securities”). The fixed interest rate on the 2018-1R Tower Securities is 4.949% per annum, payable monthly. Principal and interest payments made on the 2018-1R Tower Securities eliminate in consolidation.

In connection with the issuance of the 2018-1C Tower Securities, the non-recourse mortgage loan was increased by $673.7 million (but decreased by a net of $81.3 million after giving effect to prepayment of the loan components relating to the 2013-1C Tower Securities and 2013-1D Tower Securities). The new loan, after eliminating the risk retention securities, accrues interest at the same rate as the 2018-1C Tower Securities and is subject to all other material terms of the existing mortgage loan, including collateral and interest rate after the anticipated repayment date.



In connection with the issuance of the 2018-1C Tower Securities, SBA Properties, LLC, SBA Sites, LLC, SBA Structures, LLC, SBA Infrastructure, LLC, SBA Monarch Towers III, LLC, SBA 2012 TC Assets PR, LLC, SBA 2012 TC Assets, LLC, SBA Towers IV, LLC, SBA Monarch Towers I, LLC, SBA Towers USVI, Inc., SBA Towers VII, LLC, SBA GC Towers, LLC, SBA Towers V, LLC, and SBA Towers VI, LLC (collectively, the “Borrowers”), each an indirect subsidiary of SBAC, and Midland Loan Services, a division of PNC Bank, National Association, as servicer, on behalf of the Trustee entered into the Second Loan and Security Agreement Supplement and Amendment pursuant to which, among other things, (1) the outstanding principal amount of the mortgage loan was increased by $640.0 million and (2) the Borrowers became jointly and severally liable for the aggregate $4.7 billion borrowed under the mortgage loan corresponding to the 2013-2C Tower Securities, 2014 Tower Securities, 2015-1C Tower Securities, 2016-1C Tower Securities, 2017-1C Tower Securities, and the newly issued 2018-1C Tower Securities.

## Debt Covenants

As of December 31, 2018, the Borrowers met the debt service coverage ratio required by the mortgage loan agreement and were in compliance with all other covenants as set forth in the agreement.

## Senior Notes

## 2014 Senior Notes

On July 1, 2014, we issued $750.0 million of unsecured senior notes due July 15, 2022 (the “2014 Senior Notes”). The 2014 Senior Notes accrue interest at a rate of 4.875% per annum and were issued at 99.178% of par value. Interest on the 2014 Senior Notes is due semi-annually on January 15 and July 15 of each year. We incurred financing fees of $11.6 million in relation to this transaction which are being amortized through the maturity date.

The 2014 Senior Notes are subject to redemption in whole or in part at the redemption prices set forth in the indenture agreement plus accrued and unpaid interest. We may redeem the 2014 Senior Notes during the twelve-month period beginning on the following dates at the following redemption prices: July 15, 2019 at 101.219% or July 15, 2020 until maturity at 100.000% of the principal amount of the 2014 Senior Notes to be redeemed on the redemption date plus accrued and unpaid interest.

## 2016 Senior Notes

On August 15, 2016, we issued $1.1 billion of unsecured senior notes due September 1, 2024 (the “2016 Senior Notes”). The 2016 Senior Notes accrue interest at a rate of 4.875% per annum and were issued at 99.178% of par value. Interest on the 2016 Senior Notes is due semi-annually on March 1 and September 1 of each year, beginning on March 1, 2017. We incurred financing fees of $12.8 million in relation to this transaction, which are being amortized through the maturity date. Net proceeds from this offering and cash on hand were used to redeem $800.0 million, the aggregate principal amount outstanding, of Telecommunications’ 5.75% Senior Notes and $250.0 million of our 5.625% Senior Notes and pay the associated call premiums.

The 2016 Senior Notes are subject to redemption in whole or in part on or after September 1, 2019 at the redemption prices set forth in the indenture agreement plus accrued and unpaid interest. Prior to September 1, 2019, we may at our option redeem up to 35% of the aggregate principal amount of the 2016 Senior Notes originally issued at a redemption price of 104.875% of the principal amount of the 2016 Senior Notes to be redeemed on the redemption date plus accrued and unpaid interest with the net proceeds of certain equity offerings. We may redeem the 2016 Senior Notes during the twelve-month period beginning on the following dates at the following redemption prices: September 1, 2019 at 103.656%, September 1, 2020 at 102.438%, September 1, 2021 at 101.219%, or September 1, 2022 until maturity at 100.000%, of the principal amount of the 2016 Senior Notes to be redeemed on the redemption date plus accrued and unpaid interest.

## 2017 Senior Notes

On October 13, 2017, we issued $750.0 million of unsecured senior notes due October 1, 2022 (the “2017 Senior Notes”). The 2017 Senior Notes accrue interest at a rate of 4.0% per annum. Interest on the 2017 Senior Notes is due semi-annually on April 1 and October 1 of each year, beginning on April 1, 2018. We incurred financing fees of $8.9 million in relation to this transaction, which are being amortized through the maturity date. Net proceeds from this offering were used to repay $460.0 million outstanding under the Revolving Credit Facility and for general corporate purposes.

The 2017 Senior Notes are subject to redemption in whole or in part on or after October 1, 2019 at the redemption prices set forth in the indenture agreement plus accrued and unpaid interest. Prior to October 1, 2020, we may, at our option, redeem up to 35%



of the aggregate principal amount of the 2017 Senior Notes originally issued at a redemption price of 104.000% of the principal amount of the 2017 Senior Notes to be redeemed on the redemption date plus accrued and unpaid interest with the net proceeds of certain equity offerings. We may redeem the 2017 Senior Notes during the twelve-month period beginning on the following dates at the following redemption prices: October 1, 2019 at 102.000%, October 1, 2020 at 101.000%, or October 1, 2021 until maturity at 100.000%, of the principal amount of the 2017 Senior Notes to be redeemed on the redemption date plus accrued and unpaid interest.

## Indentures Governing Senior Notes

The Indentures governing the Senior Notes contain customary covenants, subject to a number of exceptions and qualifications, including restrictions on the ability of SBAC and Telecommunications to (1) incur additional indebtedness unless the Consolidated Indebtedness to Annualized Consolidated Adjusted EBITDA Ratio (as defined in the Indenture), pro forma for the additional indebtedness does not exceed, with respect to any fiscal quarter, 9.5x for SBAC, (2) merge, consolidate or sell assets, (3) make restricted payments, including dividends or other distributions, (4) enter into transactions with affiliates, and (5) enter into sale and leaseback transactions and restrictions on the ability of the Restricted Subsidiaries of SBAC (as defined in the Indentures) to incur liens securing indebtedness.

## Debt Service

As of December 31, 2018, we believe that our cash on hand, capacity available under our Revolving Credit Facility, and cash flows from operations for the next twelve months will be sufficient to service our outstanding debt during the next twelve months.

The following table illustrates our estimate of our debt service requirement over the twelve months ended December 31, 2019 based on the amounts outstanding as of December 31, 2018 and the interest rates accruing on those amounts on such date (in thousands):

<table><tr><td>2014 Senior Notes</td><td>$</td><td>36,563</td></tr><tr><td>2016 Senior Notes</td><td></td><td>53,625</td></tr><tr><td>2017 Senior Notes</td><td></td><td>30,000</td></tr><tr><td>2013-2C Tower Securities</td><td></td><td>21,585</td></tr><tr><td>2014-1C Tower Securities (1)</td><td></td><td>941,261</td></tr><tr><td>2014-2C Tower Securities</td><td></td><td>24,185</td></tr><tr><td>2015-1C Tower Securities</td><td></td><td>15,939</td></tr><tr><td>2016-1C Tower Securities</td><td></td><td>20,361</td></tr><tr><td>2017-1C Tower Securities</td><td></td><td>24,318</td></tr><tr><td>2018-1C Tower Securities</td><td></td><td>22,270</td></tr><tr><td>Revolving Credit Facility</td><td></td><td>16,539</td></tr><tr><td>2018 Term Loan (2)</td><td></td><td>131,769</td></tr><tr><td>Total debt service for the next 12 months</td><td>$</td><td>1,338,415</td></tr></table>

(1) The anticipated repayment date and the final maturity date for the 2014-1C Tower Securities is October 8, 2019 and October 11, 2044, respectively. Interest expense included above is through the anticipated repayment date.

(2) On February 1, 2019, we, through our wholly owned subsidiary, SBA Senior Finance II, LLC, entered into a four-year interest rate swap on a portion of our 2018 Term Loan. We swapped $1.2 billion of notional value accruing interest at one month LIBOR plus 200 basis points for a fixed rate of 4.495% per annum. Including the impact of the interest rate swap, the estimate of our debt service requirement based on the amounts outstanding for the 2018 Term Loan as of December 31, 2018 would have been $131,352.

## Inflation

The impact of inflation on our operations has not been significant to date. However, we cannot assure you that a high rate of inflation in the future will not adversely affect our operating results particularly in light of the fact that our site leasing revenues are



governed by long-term contracts with pre-determined pricing that we will not be able to increase in response to increases in inflation other than our contracts in South America which have inflationary index based rental escalators.

## Commitments and Contractual Obligations

The following table summarizes our scheduled contractual commitments as of December 31, 2018:

<table><tr><td></td><td>2019</td><td>2020</td><td>2021</td><td>2022</td><td>2023</td><td>Thereafter</td></tr><tr><td></td><td colspan="6">(in thousands)</td></tr><tr><td>Principal payments of debt</td><td>$ 944,000</td><td>$ 524,000</td><td>$ 724,000</td><td>$ 2,284,000</td><td>$ 1,564,000</td><td>$ 3,988,000</td></tr><tr><td>Interest payments (1)</td><td>394,413</td><td>368,655</td><td>345,200</td><td>292,171</td><td>196,488</td><td>207,919</td></tr><tr><td>Operating leases</td><td>237,730</td><td>239,208</td><td>241,090</td><td>242,320</td><td>243,476</td><td>3,675,859</td></tr><tr><td>Capital leases</td><td>883</td><td>482</td><td>303</td><td>86</td><td>—</td><td>—</td></tr><tr><td>Employment agreements</td><td>2,725</td><td>2,725</td><td>1,775</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Total contractual obligations</td><td>$ 1,579,751</td><td>$ 1,135,070</td><td>$ 1,312,368</td><td>$ 2,818,577</td><td>$ 2,003,964</td><td>$ 7,871,778</td></tr></table>

(1) Represents interest payments based on the 2013-2C Tower Securities interest rate of 3.722%, the 2014-1C Tower Securities interest rate of 2.898%, the 2014-2C Tower Securities interest rate of 3.869%, the 2015-1C Tower Securities interest rate of 3.156%, the 2016-1C Tower Securities interest rate of 2.877%, the 2017-1C Tower Securities interest rate of 3.168%, the 2018-1C Tower Securities interest rate of 3.448%, the 2018 Term Loan at an interest rate of 4.53% as of December 31, 2018, the Revolving Credit Facility at an average interest rate of 4.38% as of December 31, 2018, the 2014 Senior Notes interest rate of 4.875%, the 2016 Senior Notes interest rate of 4.875%, and the 2017 Senior Notes interest rate of 4.000%.

## Off-Balance Sheet Arrangements

We are not involved in any off-balance sheet arrangements.

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

We are exposed to certain market risks that are inherent in our financial instruments. These instruments arise from transactions entered into in the normal course of business.



The following table presents the future principal payment obligations and fair values associated with our long-term debt instruments assuming our actual level of long-term indebtedness as of December 31, 2018:

<table><tr><td></td><td>2019</td><td>2020</td><td>2021</td><td>2022</td><td>2023</td><td>Thereafter</td><td>Total</td><td>Fair Value</td></tr><tr><td></td><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td><td></td></tr><tr><td>2014 Senior Notes</td><td>$ —</td><td>$ —</td><td>$ —</td><td>$ 750,000</td><td>$ —</td><td>$ —</td><td>$ 750,000</td><td>$ 735,000</td></tr><tr><td>2016 Senior Notes</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>1,100,000</td><td>1,100,000</td><td>1,034,000</td></tr><tr><td>2017 Senior Notes</td><td>—</td><td>—</td><td>—</td><td>750,000</td><td>—</td><td>—</td><td>750,000</td><td>712,500</td></tr><tr><td>2013-2C Tower Securities (1)</td><td>—</td><td>—</td><td>—</td><td>—</td><td>575,000</td><td>—</td><td>575,000</td><td>569,164</td></tr><tr><td>2014-1C Tower Securities (1)</td><td>920,000</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>920,000</td><td>914,241</td></tr><tr><td>2014-2C Tower Securities (1)</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td><td>620,000</td><td>620,000</td><td>609,665</td></tr><tr><td>2015-1C Tower Securities (1)</td><td>—</td><td>500,000</td><td>—</td><td>—</td><td>—</td><td>—</td><td>500,000</td><td>496,640</td></tr><tr><td>2016-1C Tower Securities (1)</td><td>—</td><td>—</td><td>700,000</td><td>—</td><td>—</td><td>—</td><td>700,000</td><td>691,432</td></tr><tr><td>2017-1C Tower Securities (1)</td><td>—</td><td>—</td><td>—</td><td>760,000</td><td>—</td><td>—</td><td>760,000</td><td>744,496</td></tr><tr><td>2018-1C Tower Securities (1)</td><td>—</td><td>—</td><td>—</td><td>—</td><td>640,000</td><td>—</td><td>640,000</td><td>641,478</td></tr><tr><td>Revolving Credit Facility</td><td>—</td><td>—</td><td>—</td><td>—</td><td>325,000</td><td>—</td><td>325,000</td><td>325,000</td></tr><tr><td>2018 Term Loan</td><td>24,000</td><td>24,000</td><td>24,000</td><td>24,000</td><td>24,200</td><td>2,268,000</td><td>2,388,000</td><td>2,262,630</td></tr><tr><td>Total debt obligation</td><td>$ 944,000</td><td>$ 524,000</td><td>$ 724,000</td><td>$ 2,284,000</td><td>$ 1,564,000</td><td>$ 3,988,000</td><td>$ 10,028,000</td><td>$ 9,736,246</td></tr></table>

(1) The anticipated repayment date and the final maturity date for the 2013-2C Tower Securities is April 11, 2023 and April 9, 2048, respectively.

The anticipated repayment date and the final maturity date for the 2014-1C Tower Securities is October 8, 2019 and October 11, 2044, respectively.

The anticipated repayment date and the final maturity date for the 2014-2C Tower Securities is October 8, 2024 and October 8, 2049, respectively.

The anticipated repayment date and the final maturity date for the 2015-1C Tower Securities is October 8, 2020 and October 10, 2045, respectively.

The anticipated repayment date and the final maturity date for the 2016-1C Tower Securities is July 9, 2021 and July 10, 2046, respectively.

The anticipated repayment date and the final maturity date for the 2017-1C Tower Securities is April 11, 2022 and April 9, 2047, respectively.

The anticipated repayment date and the final maturity date for the 2018-1C Tower Securities is March 9, 2023 and March 9, 2048, respectively.

Our current primary market risk exposure is (1) interest rate risk relating to our ability to refinance our debt at commercially reasonable rates, if at all, and (2) interest rate risk relating to the impact of interest rate movements on the variable portion of our 2018 Term Loan and any borrowings that we may incur under our Revolving Credit Facility, which are at floating rates. We manage the interest rate risk on our outstanding debt through our large percentage of fixed rate debt, including a four-year interest rate swap on a portion of our 2018 Term Loan entered into on February 1, 2019. We swapped $1.2 billion of notional value accruing interest at one month LIBOR plus 200 basis points for a fixed rate of 4.495% per annum. While we cannot predict our ability to refinance existing debt or the impact interest rate movements will have on our existing debt, we continue to evaluate our financial position on an ongoing basis.

We are exposed to market risk from changes in foreign currency exchange rates in connection with our operations in Brazil, Canada, Chile, Peru, Argentina, Colombia, and to a lesser extent, our markets in Central America. In each of these countries, we pay most of our selling, general, and administrative expenses and a portion of our operating expenses, such as taxes and utilities incurred in the country in local currency. In addition, in Brazil, Canada, and Chile, we receive significantly all of our revenue and pay significantly all of our operating expenses in local currency. In Colombia, Argentina, and Peru, we receive our revenue and pay our operating expenses in a mix of local currency and U.S. dollars. All transactions denominated in currencies other than the U.S. Dollar are 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 income (loss). For



the year ended December 31, 2018, approximately 13.3% of our revenues and approximately 16.9% of our total operating expenses were denominated in foreign currencies.

We have performed a sensitivity analysis assuming a hypothetical 10% adverse movement in the Brazilian Real from the quoted foreign currency exchange rates at December 31, 2018. As of December 31, 2018, the analysis indicated that such an adverse movement would have caused our revenues and operating income to decline by approximately 1.1% and 0.5%, respectively, for the year ended December 31, 2018.

As of December 31, 2018, we had intercompany debt, which is denominated in a currency other than the functional currency of the subsidiary in which it is recorded. As settlement of this debt is anticipated or planned in the foreseeable future, 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. A change of 10% in the underlying exchange rates of our unsettled intercompany debt at December 31, 2018 would have resulted in approximately $53.6 million of unrealized gains or losses that would have been included in Other income (expense), net in our Consolidated Statements of Operations for the year ended December 31, 2018.

## Special Note Regarding Forward-Looking Statements

This annual report contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements concern expectations, beliefs, projections, plans and strategies, anticipated events or trends and similar expressions concerning matters that are not historical facts. Specifically, this annual report contains forward-looking statements regarding:

- our expectations on the future growth and financial health of the wireless industry and the industry participants, the drivers of such growth, the demand for our towers, the future capital investments of our customers, the trends developing in our industry, and competitive factors;

- our ability to capture and capitalize on industry growth and the impact of such growth on our financial and operational results;

- our intent to grow our tower portfolio domestically and internationally and expand through acquisitions, new builds and organic lease up on existing towers;

- our belief that over the long-term, site leasing revenues will continue to grow as wireless service providers increase their use of our towers due to increasing minutes of network use and data transfer, network expansion and network coverage requirements;

- our expectation regarding site leasing revenue growth, on an organic basis, in our domestic and international segments, and the drivers of such growth;

- our focus on our site leasing business and belief that our site leasing business is characterized by stable and long-term recurring revenues, reduced exposure to changes in customer spending, predictable operating costs, and minimal non-discretionary capital expenditures;

- our expectation that, due to the relatively young age and mix of our tower portfolio, future expenditures required to maintain these towers will be minimal;

- our expectation that we will grow our cash flows by adding tenants to our towers at minimal incremental costs and executing monetary amendments;

• our expectations regarding churn rates;

• our election to be subject to tax as a REIT and our intent to continue to operate as a REIT;

- our belief that our business is currently operated in a manner that complies with the REIT rules and our intent to continue to do so;

- our plans regarding our distribution policy, and the amount and timing of, and source of funds for, any such distributions;
- our expectations regarding the use of NOLs to reduce REIT taxable income;

- our expectations regarding our capital allocation strategy, including future allocation decisions between stock repurchases and portfolio growth, the impact of our election to be taxed as a REIT on that strategy, and our goal of increasing our Adjusted Funds From Operations per share;

- our expectations regarding our future cash capital expenditures, both discretionary and non-discretionary, including expenditures required to maintain, improve, and modify our towers, ground lease purchases, and general corporate expenditures, and the source of funds for these expenditures;

- our expectations regarding our business strategies, including our strategy for securing rights to the land underlying our towers, and the impact of such strategies on our financial and operational results;

• our intended use of our liquidity;

• our intent to maintain our target leverage levels;



- our expectations regarding our debt service in 2019 and our belief that our cash on hand, capacity under our Revolving Credit Facility, and our cash flows from operations for the next twelve months will be sufficient to service our outstanding debt during the next twelve months; and

- our expectations and estimates regarding certain tax and accounting matters, including the impact on our financial statements.

These forward-looking statements reflect our current views about future events and are subject to risks, uncertainties and assumptions. We wish to caution readers that certain important factors may have affected and could in the future affect our actual results and could cause actual results to differ significantly from those expressed in any forward-looking statement. The most important factors that could prevent us from achieving our goals, and cause the assumptions underlying forward-looking statements and the actual results to differ materially from those expressed in or implied by those forward-looking statements include, but are not limited to, the following:

- the impact of consolidation among wireless service providers, including the potential impact of the proposed merger between Sprint and T-Mobile if consummated, on our leasing revenue;

- our ability to continue to comply with covenants and the terms of our credit instruments and our ability to obtain additional financing to fund our capital expenditures;

- our ability to successfully manage the risks associated with international operations, including risks relating to political or economic conditions, inflation, tax laws, currency restrictions and exchange rate fluctuations, legal or judicial systems, and land ownership;

- our ability to successfully manage the risks associated with our acquisition initiatives, including our ability to effectively integrate acquired towers into our business and to achieve the financial results projected in our valuation models for the acquired towers;

- developments in the wireless communications industry in general, and for wireless communications infrastructure providers in particular, that may slow growth or affect the willingness or ability of the wireless service providers to expend capital to fund network expansion or enhancements;

- our ability to secure as many site leasing tenants as anticipated, recognize our expected economies of scale with respect to new tenants on our towers, and retain current leases on towers;

• our ability to secure and deliver anticipated services business at contemplated margins;

- our ability to build new towers, including our ability to identify and acquire land that would be attractive for our customers and to successfully and timely address zoning, permitting, weather, availability of labor and supplies and other issues that arise in connection with the building of new towers;

- competition for the acquisition of towers and other factors that may adversely affect our ability to purchase towers that meet our investment criteria and are available at prices which we believe will be accretive to our shareholders and allow us to maintain our long-term target leverage ratios while achieving our expected portfolio growth levels;

• our capital allocation decisions and the impact on our ability to achieve our expected tower portfolio growth levels;

- our ability to protect our rights to the land under our towers, and our ability to acquire land underneath our towers on terms that are accretive;

- our ability to sufficiently increase our revenues and maintain expenses and cash capital expenditures at appropriate levels to permit us to meet our anticipated uses of liquidity for operations, debt service and estimated portfolio growth;

- the impact of rising interest rates on our results of operations and our ability to refinance our existing indebtedness at commercially reasonable rates or at all;

• our ability to successfully estimate the impact of regulatory and litigation matters;

• natural disasters and other unforeseen damage for which our insurance may not provide adequate coverage;

• a decrease in demand for our towers;

- the introduction of new technologies or changes in a tenant’s business model that may make our tower leasing business less desirable to existing or potential tenants;

- our ability to qualify for treatment as a REIT for U.S. federal income tax purposes and to comply with and conduct our business in accordance with such rules;

• our ability to utilize available NOLs to reduce REIT taxable income; and

- our ability to successfully estimate the impact of certain accounting and tax matters, including the effect on our company of adopting certain accounting pronouncements and the availability of sufficient NOLs to offset future REIT taxable income.

## ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Financial statements and supplementary data are on pages F-1 through F-43.



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

None.

## ITEM 9A. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures – We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our reports under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to management, including our Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, as ours are designed to do, and management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

In connection with the preparation of this Annual Report on Form 10-K, as of December 31, 2018, an evaluation was performed under the supervision and with the participation of our management, including the CEO and CFO, of the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Exchange Act). Based on such evaluation, our CEO and CFO concluded that, as of December 31, 2018, our disclosure controls and procedures were effective.

There has been no change in our internal control over financial reporting during the quarter ended December 31, 2018 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Management’s Annual Report on Internal Control over Financial Reporting – Management is responsible for establishing and maintaining adequate internal control over financial reporting, and for performing an assessment of the effectiveness of internal control over financial reporting as of December 31, 2018. 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. Our system of 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 SBAC; (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 SBAC are being made only in accordance with authorizations of management and directors of SBAC; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of SBAC’s assets that could have a material effect on the financial statements.

Management performed an assessment of the effectiveness of SBAC’s internal control over financial reporting as of December 31, 2018 based upon criteria in Internal Control – Integrated Framework (2013 Framework) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on our assessment, management determined that SBAC’s internal control over financial reporting was effective as of December 31, 2018 based on the criteria in Internal Control – Integrated Framework (2013 Framework) issued by COSO.

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.

Ernst & Young LLP, the independent registered public accounting firm that audited the financial statements included in this Annual Report on Form 10-K, has issued an attestation report on SBAC’s internal control over financial reporting.



# Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of SBA Communications Corporation and Subsidiaries

## Opinion on Internal Control over Financial Reporting

We have audited SBA Communications Corporation and Subsidiaries' internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, SBA Communications Corporation and Subsidiaries' (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2018, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2018 and 2017 and the related consolidated statements of operations, comprehensive income (loss), shareholders' deficit, and cash flows for each of the three years in the period ended December 31, 2018, and the related notes and financial statement schedule listed in the Index at Item 15(a) of the Company and our report dated February 28, 2019 expressed an unqualified opinion thereon.

## 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/ Ernst & Young LLP

Boca Raton, Florida
February 28, 2019



## PART III

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

We have adopted a Code of Ethics that applies to our Chief Executive Officer, Chief Financial Officer and Chief Accounting Officer. The Code of Ethics is located on our internet web site at www.sbasite.com under “Investors – Governance – Governance Documents.” We intend to provide disclosure of any amendments or waivers of our Code of Ethics on our website within four business days following the date of the amendment or waiver.

The remaining items required by Part III, Item 10 are incorporated herein by reference from the Registrant’s Proxy Statement for its 2019 Annual Meeting of Shareholders to be filed on or before April 30, 2019.

## ITEM 11. EXECUTIVE COMPENSATION

The items required by Part III, Item 11 are incorporated herein by reference from the Registrant’s Proxy Statement for its 2019 Annual Meeting of Shareholders to be filed on or before April 30, 2019.

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

The items required by Part III, Item 12, other than the information regarding the Registrant’s equity plans set forth below required by Item 201(d) of Regulation S-K, are incorporated herein by reference from the Registrant’s Proxy Statement for its 2019 Annual Meeting of Shareholders to be filed on or before April 30, 2019.

## Equity Compensation Plan

The following table summarizes information with respect to the Registrant’s compensation plans under which the Registrant’s equity securities are authorized for issuance as of December 31, 2018:

<table><tr><td rowspan="3"></td><td colspan="4">Equity Compensation Plan Information</td></tr><tr><td colspan="4">As of December 31, 2018</td></tr><tr><td colspan="4">(in thousands, except exercise price)</td></tr><tr><td></td><td>Number of Securities to be Issued</td><td>Weighted Average Exercise Price</td><td>Number of Securities Remaining Available for Future Issuance Under</td><td></td></tr><tr><td></td><td>Upon Exercise of Outstanding Options, Warrants and Rights</td><td>of Outstanding Options, Warrants and Rights</td><td>Equity Compensation Plans (Excluding Securities Reflected in first column (a))</td><td></td></tr><tr><td></td><td>(a)</td><td>(b)</td><td>(c)</td><td></td></tr><tr><td>Equity compensation plans approved by security holders</td><td></td><td></td><td></td><td></td></tr><tr><td>2010 Plan</td><td>5,140 (1)</td><td>$ 107.29</td><td>6,517</td><td></td></tr><tr><td>Equity compensation plans not approved by security holders</td><td>—</td><td></td><td>—</td><td></td></tr><tr><td>Total</td><td>5,140</td><td>$ 107.29</td><td>6,517</td><td></td></tr></table>

(1) Included in the number of securities in column (a) is 322,784 restricted stock units, which have no exercise price. The weighted average exercise price of outstanding options, warrants, and rights (excluding restricted stock units) is $114.48.



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

The items required by Part III, Item 13 are incorporated herein by reference from the Registrant’s Proxy Statement for its 2019 Annual Meeting of Shareholders to be filed on or before April 30, 2019.

## ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES

The items required by Part III, Item 14 are incorporated herein by reference from the Registrant’s Proxy Statement for its 2019 Annual Meeting of Shareholders to be filed on or before April 30, 2019.

## PART IV

## ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES

(a) Documents filed as part of this report:

(1) Financial Statements

See Item 8 for Financial Statements included with this Annual Report on Form 10-K.

(2) Financial Statement Schedules

Schedule III—Schedule of Real Estate and Accumulated Depreciation (see below)

All other schedules are omitted because they are not applicable or because the required information is contained in the financial statements or notes thereto included in this Form 10-K.

Schedule III—Schedule of Real Estate and Accumulated Depreciation

<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 Statement is Computed</td></tr><tr><td colspan="9">(in thousands)</td></tr><tr><td>29,578 sites</td><td>(1) $ 7,428,000</td><td>(2)</td><td>(3)</td><td>(4) $ 5,561,005</td><td>(2,868,507)</td><td>Various</td><td>Various</td><td>Up to 20 years</td></tr></table>

(1) No single site exceeds 5% of the aggregate gross amounts at which the assets were carried at the close of the period set forth in the table above.

(2) As of December 31, 2018, certain assets secure debt of $7.4 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>2018</td><td>2017</td><td>2016</td></tr><tr><td></td><td colspan="3">(in thousands)</td></tr><tr><td>Gross amount at beginning</td><td>$ 5,340,858</td><td>$ 5,079,660</td><td>$ 4,839,874</td></tr><tr><td>Additions during period:</td><td></td><td></td><td></td></tr><tr><td>Acquisitions (1)</td><td>131,686</td><td>112,979</td><td>72,456</td></tr><tr><td>Construction and related costs on new builds</td><td>54,237</td><td>70,361</td><td>58,143</td></tr><tr><td>Augmentation and tower upgrades</td><td>49,201</td><td>43,288</td><td>37,861</td></tr><tr><td>Land buyouts and other assets</td><td>37,032</td><td>41,657</td><td>44,574</td></tr><tr><td>Tower maintenance</td><td>30,048</td><td>29,391</td><td>28,257</td></tr><tr><td>Other (2)</td><td>—</td><td>—</td><td>45,829</td></tr><tr><td>Total additions</td><td>302,204</td><td>297,676</td><td>287,120</td></tr><tr><td>Deductions during period:</td><td></td><td></td><td></td></tr><tr><td>Cost of real estate sold or disposed</td><td>(1,083)</td><td>(1,027)</td><td>(12,842)</td></tr><tr><td>Impairment</td><td>(17,130)</td><td>(34,101)</td><td>(34,492)</td></tr><tr><td>Other (2)</td><td>(63,844)</td><td>(1,350)</td><td>—</td></tr><tr><td>Total deductions</td><td>(82,057)</td><td>(36,478)</td><td>(47,334)</td></tr><tr><td>Balance at end</td><td>$ 5,561,005</td><td>$ 5,340,858</td><td>$ 5,079,660</td></tr></table>

(1) Inclusive of changes between the final purchase price allocation and the preliminary purchase price allocations.

(2) Primarily represents cumulative translation adjustments related to changes in foreign currency exchange rates.

<table><tr><td></td><td>2018</td><td>2017</td><td>2016</td></tr><tr><td></td><td colspan="3">(in thousands)</td></tr><tr><td>Gross amount of accumulated depreciation at beginning</td><td>$ (2,627,841)</td><td>$ (2,396,587)</td><td>$ (2,160,530)</td></tr><tr><td>Additions during period:</td><td></td><td></td><td></td></tr><tr><td>Depreciation</td><td>(257,469)</td><td>(248,818)</td><td>(254,982)</td></tr><tr><td>Other (1)</td><td>(25)</td><td>—</td><td>(5,557)</td></tr><tr><td>Total additions</td><td>(257,494)</td><td>(248,818)</td><td>(260,539)</td></tr><tr><td>Deductions during period:</td><td></td><td></td><td></td></tr><tr><td>Amount of accumulated depreciation for assets sold or disposed</td><td>4,392</td><td>17,051</td><td>24,482</td></tr><tr><td>Other (1)</td><td>12,436</td><td>513</td><td>—</td></tr><tr><td>Total deductions</td><td>16,828</td><td>17,564</td><td>24,482</td></tr><tr><td>Balance at end</td><td>$ (2,868,507)</td><td>$ (2,627,841)</td><td>$ (2,396,587)</td></tr></table>

(1) Primarily represents cumulative translation adjustments related to changes in foreign currency exchange rates.



(3) Exhibits

<table><tr><td rowspan="2">Exhibit Nb.</td><td rowspan="2">Exhibit Description</td><td colspan="2">Incorporated by Reference</td></tr><tr><td>Form</td><td>Period Covered or Date of Filing</td></tr><tr><td>2.1</td><td>Agreement and Plan of Merger, by and between SBA Communications Corporation and SBA Communications REIT Corporation, dated November 10, 2016.</td><td>8-K</td><td>01/17/17</td></tr><tr><td>3.1</td><td>Amended and Restated Articles of Incorporation of SBA Communications Corporation, effective as of January 13, 2017.</td><td>8-K</td><td>01/17/17</td></tr><tr><td>3.2</td><td>Articles of Merger, effective as of January 13, 2017.</td><td>8-K</td><td>01/17/17</td></tr><tr><td>3.3</td><td>Second Amended and Restated Bylaws of SBA Communications Corporation, effective as of January 14, 2017.</td><td>8-K</td><td>01/18/17</td></tr><tr><td>4.15A</td><td>Form of Senior Indenture.</td><td>S-3ASR (333-223449)</td><td>03/05/18</td></tr><tr><td>4.16A</td><td>Form of Subordinated Indenture.</td><td>S-3ASR (333-223449)</td><td>03/05/18</td></tr><tr><td>4.24</td><td>Indenture, dated July 1, 2014, between SBA Communications Corporation and U.S. Bank National Association.</td><td>8-K</td><td>07/01/14</td></tr><tr><td>4.24A</td><td>Supplemental Indenture, dated as of January 13, 2017, between SBA Communications Corporation and U.S. Bank National Association, to the Indenture dated as of July 1, 2014, between SBA Communications Corporation and U.S. Bank National Association.</td><td>8-K</td><td>01/17/17</td></tr><tr><td>4.25</td><td>Form of 4.875% Senior Notes due 2022 (included in Exhibit 4.24).</td><td>8-K</td><td>07/01/14</td></tr><tr><td>4.26</td><td>Indenture, dated August 15, 2016, between SBA Communications Corporation and U.S. Bank National Association.</td><td>8-K</td><td>08/16/16</td></tr><tr><td>4.26A</td><td>Supplemental Indenture, dated as of January 13, 2017, between SBA Communications Corporation and U.S. Bank National Association, to the Indenture dated as of August 15, 2016, between SBA Communications Corporation and U.S. Bank National Association.</td><td>8-K</td><td>01/17/17</td></tr><tr><td>4.27</td><td>Form of 4.875% Senior Notes due 2024 (included in Exhibit 4.26).</td><td>8-K</td><td>08/16/16</td></tr><tr><td>4.28</td><td>Indenture, dated as of October 13, 2017, between SBA Communications Corporation and U.S. Bank National Association</td><td>8-K</td><td>10/16/17</td></tr><tr><td>4.29</td><td>Form of 4.00% Senior Notes due 2022 (included in Exhibit 4.28).</td><td>8-K</td><td>10/16/17</td></tr><tr><td>10.1</td><td>SBA Communications Corporation Registration Rights Agreement dated as of March 5, 1997, among the Company, Steven E. Bernstein, Ronald G. Bizick, II and Robert Grobstein.</td><td>S-4 (333-50219)</td><td>04/15/98</td></tr><tr><td>10.7B</td><td>2018 Refinancing Amendment, dated as of April 11, 2018, among SBA Senior Finance II LLC, as borrower, the banks and other financial institutions or entities party hereto as refinancing revolving lenders, continuing term lenders, additional</td><td>8-K</td><td>04/11/18</td></tr></table>



term lenders or incremental amended term lenders and Toronto Dominion (Texas) LLC, as administrative agent and issuing lender.

10.8 Second Amended and Restated Guarantee and Collateral Agreement, dated as of February 7, 2014, among SBA Communications Corporation, SBA Telecommunications, LLC, SBA Senior Finance, LLC, SBA Senior Finance II LLC and certain of its subsidiaries, as identified in the Second Amended and Restated Guarantee and Collateral Agreement, in favor of Toronto Dominion (Texas) LLC, as administrative agent.

10.12 Second Amended and Restated Loan and Security Agreement, dated as of October 15, 2014, among SBA Properties, LLC, SBA Sites, LLC, SBA Structures, LLC, SBA Infrastructure, LLC, SBA Monarch Towers III, LLC, SBA 2012 TC Assets PR, LLC, SBA 2012 TC Assets, LLC, SBA Towers IV, LLC, SBA Monarch Towers I, LLC, SBA Towers USVI, Inc., SBA GC Towers, LLC, SBA Towers VII, LLC and any Additional Borrower or Borrowers that may become a party thereto and Midland Loan Services, as Servicer on behalf of Deutsche Bank Trust Company Americas, as Trustee.

10.12A First Loan and Security Agreement Supplement and Amendment, dated as of October 14, 2015, by and among the Borrowers named therein and Midland Loan Services, a division of PNC Bank, National Association, as Servicer on behalf of Deutsche Bank Trust Company Americas, as Trustee.

10.12B Second Loan and Security Agreement Supplement, dated as of July 7, 2016, by and among the Borrowers named therein and Midland Loan Services, a division of PNC Bank, National Association, as Servicer on behalf of Deutsche Bank Trust Company Americas, as Trustee.

10.12C Third Loan and Security Agreement Supplement and Amendment, dated as of April 7, 2017, by and among the Borrowers named therein and Midland Loan Services, a division of PNC Bank, National Association, as Servicer on behalf of Deutsche Bank Trust Company Americas, as Trustee.

10.12D Fourth Loan and Security Agreement Supplement, dated as of March 9, 2018, by and among the Borrowers named therein and Midland Loan Services, a division of PNC Bank, National Association, as Servicer on behalf of Deutsche Bank Trust Company Americas, as Trustee.

10.16 Purchase Agreement, dated April 4, 2017, among SBA Senior Finance, LLC, Deutsche Bank Trust Company Americas, as trustee, and the several initial purchasers listed on Schedule I thereto.

10.17 Registration Rights Agreement, dated October 13, 2017, between SBA Communications Corporation and Citigroup Global Markets Inc. and J.P. Morgan Securities LLC, as representatives of the several initial purchasers listed on Schedule I thereto.

10.18 Purchase Agreement, dated September 28, 2017, between SBA Communications Corporation and Citigroup Global Markets, Inc. and J.P. Morgan Securities LLC, as representatives of the several initial purchasers listed on Schedule I thereto.
10-Q Quarter ended
September 30, 2014

8-K 10/20/15

8-K 07/08/16

8-K 04/21/17

8-K 03/15/18

8-K 04/07/17

8-K 10/16/17

8-K Quarter ended
September 30, 2017



10.19 Purchase Agreement, dated February 16, 2018, among SBA Senior Finance, LLC, Deutsche Bank Trust Company Americas, as trustee, and the several initial purchasers listed on Schedule I thereto.

10.35G Employment Agreement, dated August 15, 2017, between SBA Communications Corporation and Jeffrey A. Stoops.†

10.35H Amendment to Employment Agreement, effective as of August 15, 2017, between SBA Communications Corporation and Jeffrey A. Stoops.†*

10.50 Management Agreement, dated as of November 18, 2005, by and among SBA Properties, Inc., SBA Network Management, Inc. and SBA Senior Finance, Inc.

10.50A Joinder and Amendment to Management Agreement, dated November 6, 2006, by and among SBA Properties, Inc., SBA Towers, Inc., SBA Puerto Rico, Inc., SBA Sites, Inc., SBA Towers USVI, Inc., and SBA Structures, Inc., and SBA Network Management, Inc., and SBA Senior Finance, Inc.

10.57F Amended and Restated Employment Agreement, dated as of October 1, 2018, between SBA Communications Corporation and Kurt L. Bagwell.†*

10.58F Amended and Restated Employment Agreement, dated as of October 1, 2018, between SBA Communications Corporation and Thomas P. Hunt.†*

10.75B SBA Communications Corporation 2018 Employee Stock Purchase Plan.†

10.76 Form of Indemnification Agreement dated January 15, 2009 between SBA Communications Corporation and its directors and certain officers.

10.85E Amended and Restated Employment Agreement, dated as of October 1, 2018, between SBA Communications Corporation and Brendan T. Cavanagh.†*

10.89A SBA Communications Corporation 2010 Performance and Equity Incentive Plan, as amended and restated.†

10.91 Form of Incentive Stock Option Agreement (U.S. and non-U.S. employees and officers) pursuant to SBA Communications Corporation 2010 Performance and Equity Incentive Plan, as amended and restated.†

10.92 Form of Restricted Stock Unit Agreement (U.S. and non-U.S. employees and officers) pursuant to SBA Communications Corporation 2010 Performance and Equity Incentive Plan, as amended and restated.†

21 Subsidiaries.*

23.1 Consent of Ernst & Young LLP.*

31.1 Certification by Jeffrey A. Stoops, Chief Executive Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.*

31.2 Certification by Brendan T. Cavanagh, Chief Financial Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.*

32.1 Certification by Jeffrey A. Stoops, Chief Executive Officer, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. **



32.2 Certification by Brendan T. Cavanagh, Chief Financial Officer, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.  \( * \)  \( * $ 

101.INS XBRL Instance Document.*

101.SCH XBRL Taxonomy Extension Schema Document.*

101.DEF XBRL Taxonomy Extension Definition Linkbase Document.*

101.CAL XBRL Taxonomy Extension Calculation Linkbase Document.*

101.LAB XBRL Taxonomy Extension Label Linkbase Document.*

101.PRE XBRL Taxonomy Extension Presentation Linkbase Document.*

 \( ^{\dagger} \)  Management contract or compensatory plan or arrangement.

 \( ^{*} \)  Filed herewith.

** Furnished herewith.

## 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.

SBA COMMUNICATIONS CORPORATION

By: /s/ Jeffrey A. Stoops

Jeffrey A. Stoops

Chief Executive Officer and President

Date: February 28, 2019

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been 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/ Steven E. Bernstein</td><td>Chairman of the Board of Directors</td><td>February 28, 2019</td></tr><tr><td>Steven E. Bernstein</td><td></td><td></td></tr><tr><td>/s/ Jeffrey A. Stoops</td><td>Chief Executive Officer and President</td><td>February 28, 2019</td></tr><tr><td>Jeffrey A. Stoops</td><td>(Principal Executive Officer)</td><td></td></tr><tr><td>/s/ Brendan T. Cavanagh</td><td>Chief Financial Officer and Executive Vice President</td><td>February 28, 2019</td></tr><tr><td>Brendan T. Cavanagh</td><td>(Principal Financial Officer)</td><td></td></tr><tr><td>/s/ Brian D. Lazarus</td><td>Chief Accounting Officer and Senior Vice President</td><td>February 28, 2019</td></tr><tr><td>Brian D. Lazarus</td><td>(Principal Accounting Officer)</td><td></td></tr><tr><td>/s/ Brian C. Carr</td><td>Director</td><td>February 28, 2019</td></tr><tr><td>Brian C. Carr</td><td></td><td></td></tr><tr><td>/s/ Mary S. Chan</td><td>Director</td><td>February 28, 2019</td></tr><tr><td>Mary S. Chan</td><td></td><td></td></tr><tr><td>/s/ Duncan H. Cocroft</td><td>Director</td><td>February 28, 2019</td></tr><tr><td>Duncan H. Cocroft</td><td></td><td></td></tr><tr><td>/s/ George R. Krouse Jr.</td><td>Director</td><td>February 28, 2019</td></tr><tr><td>George R. Krouse Jr.</td><td></td><td></td></tr><tr><td>/s/ Jack Langer</td><td>Director</td><td>February 28, 2019</td></tr><tr><td>Jack Langer</td><td></td><td></td></tr><tr><td>/s/ Kevin L. Beebe</td><td>Director</td><td>February 28, 2019</td></tr><tr><td>Kevin L. Beebe</td><td></td><td></td></tr></table>



# SBA COMMUNICATIONS CORPORATION AND SUBSIDIARIES
CONSOLIDATED FINANCIAL STATEMENTS

## Table of Contents

Report of Independent Registered Public Accounting Firm F-1
Consolidated Balance Sheets as of December 31, 2018 and 2017 F-2
Consolidated Statements of Operations for the years ended December 31, 2018, 2017 and 2016 F-3
Consolidated Statements of Comprehensive Income (Loss) for the years ended December 31, 2018, 2017 and 2016 F-4
Consolidated Statements of Shareholders' Deficit for the years ended December 31, 2018, 2017, and 2016 F-5
Consolidated Statements of Cash Flows for the years ended December 31, 2018, 2017 and 2016 F-6
Notes to Consolidated Financial Statements F-8



# Report of Independent Registered Public Accounting Firm

To the Shareholders and the Board of Directors of SBA Communications Corporation and Subsidiaries

## Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of SBA Communications Corporation and Subsidiaries (the Company) as of December 31, 2018 and 2017, and the related consolidated statements of operations, comprehensive income (loss), shareholders' deficit, and cash flows for each of the three years in the period ended December 31, 2018, and the related notes and financial statement schedule listed in the Index at Item 15(a) (collectively referred to as the "consolidated financial statements"). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with U.S. generally accepted accounting principles.

We also have 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, 2018, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 28, 2019 expressed an unqualified opinion thereon.

## 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.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2002.

Boca Raton, Florida
February 28, 2019



## SBA COMMUNICATIONS CORPORATION AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
(in thousands, except par values)

<table><tr><td></td><td>December 31, 2018</td><td>December 31, 2017</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>$ 143,444</td><td>$ 68,783</td></tr><tr><td>Restricted cash</td><td>32,464</td><td>32,924</td></tr><tr><td>Accounts receivable, net</td><td>111,035</td><td>90,673</td></tr><tr><td>Costs and estimated earnings in excess of billings on uncompleted contracts</td><td>23,785</td><td>17,437</td></tr><tr><td>Prepaid expenses and other current assets</td><td>63,126</td><td>49,716</td></tr><tr><td>Total current assets</td><td>373,854</td><td>259,533</td></tr><tr><td>Property and equipment, net</td><td>2,786,355</td><td>2,812,346</td></tr><tr><td>Intangible assets, net</td><td>3,331,465</td><td>3,598,131</td></tr><tr><td>Other assets</td><td>722,033</td><td>650,195</td></tr><tr><td>Total assets</td><td>$ 7,213,707</td><td>$ 7,320,205</td></tr><tr><td>LIABILITIES AND SHAREHOLDERS&#x27; DEFICIT</td><td></td><td></td></tr><tr><td>Current liabilities:</td><td></td><td></td></tr><tr><td>Accounts payable</td><td>$ 34,308</td><td>$ 33,334</td></tr><tr><td>Accrued expenses</td><td>63,665</td><td>69,862</td></tr><tr><td>Current maturities of long-term debt</td><td>941,728</td><td>20,000</td></tr><tr><td>Deferred revenue</td><td>108,054</td><td>97,969</td></tr><tr><td>Accrued interest</td><td>48,722</td><td>48,899</td></tr><tr><td>Other current liabilities</td><td>9,802</td><td>8,841</td></tr><tr><td>Total current liabilities</td><td>1,206,279</td><td>278,905</td></tr><tr><td>Long-term liabilities:</td><td></td><td></td></tr><tr><td>Long-term debt, net</td><td>8,996,825</td><td>9,290,686</td></tr><tr><td>Other long-term liabilities</td><td>387,426</td><td>349,728</td></tr><tr><td>Total long-term liabilities</td><td>9,384,251</td><td>9,640,414</td></tr><tr><td>Shareholders&#x27; deficit:</td><td></td><td></td></tr><tr><td>Preferred stock - par value $0.01, 30,000 shares authorized, no shares issued or outst.</td><td>—</td><td>—</td></tr><tr><td>Common stock - Class A, par value $0.01, 400,000 shares authorized, 112,433 and 116,446 shares issued and outstanding at December 31, 2018 and December 31, 2017, respectively</td><td>1,124</td><td>1,164</td></tr><tr><td>Additional paid-in capital</td><td>2,270,326</td><td>2,167,470</td></tr><tr><td>Accumulated deficit</td><td>(5,136,368)</td><td>(4,388,288)</td></tr><tr><td>Accumulated other comprehensive loss, net</td><td>(511,905)</td><td>(379,460)</td></tr><tr><td>Total shareholders&#x27; deficit</td><td>(3,376,823)</td><td>(2,599,114)</td></tr><tr><td>Total liabilities and shareholders&#x27; deficit</td><td>$ 7,213,707</td><td>$ 7,320,205</td></tr></table>

The accompanying notes are an integral part of these consolidated financial statements.



## SBA COMMUNICATIONS CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS
(in thousands, except per share amounts)

<table><tr><td rowspan="2"></td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>Revenues:</td><td></td><td></td><td></td></tr><tr><td>Site leasing</td><td>$ 1,740,434</td><td>$ 1,623,173</td><td>$ 1,538,070</td></tr><tr><td>Site development</td><td>125,261</td><td>104,501</td><td>95,055</td></tr><tr><td>Total revenues</td><td>1,865,695</td><td>1,727,674</td><td>1,633,125</td></tr><tr><td>Operating expenses:</td><td></td><td></td><td></td></tr><tr><td>Cost of revenues (exclusive of depreciation, accretion, and amortization shown below):</td><td></td><td></td><td></td></tr><tr><td>Cost of site leasing</td><td>372,296</td><td>359,527</td><td>342,215</td></tr><tr><td>Cost of site development</td><td>96,499</td><td>86,785</td><td>78,682</td></tr><tr><td>Selling, general, and administrative</td><td>142,526</td><td>130,697</td><td>143,349</td></tr><tr><td>Acquisition related adjustments and expenses</td><td>10,961</td><td>12,367</td><td>13,140</td></tr><tr><td>Asset impairment and decommission costs</td><td>27,134</td><td>36,697</td><td>30,242</td></tr><tr><td>Depreciation, accretion, and amortization</td><td>672,113</td><td>643,100</td><td>638,189</td></tr><tr><td>Total operating expenses</td><td>1,321,529</td><td>1,269,173</td><td>1,245,817</td></tr><tr><td>Operating income</td><td>544,166</td><td>458,501</td><td>387,308</td></tr><tr><td>Other income (expense):</td><td></td><td></td><td></td></tr><tr><td>Interest income</td><td>6,731</td><td>11,337</td><td>10,928</td></tr><tr><td>Interest expense</td><td>(376,217)</td><td>(323,749)</td><td>(329,171)</td></tr><tr><td>Non-cash interest expense</td><td>(2,640)</td><td>(2,879)</td><td>(2,203)</td></tr><tr><td>Amortization of deferred financing fees</td><td>(20,289)</td><td>(21,940)</td><td>(21,136)</td></tr><tr><td>Loss from extinguishment of debt, net</td><td>(14,443)</td><td>(1,961)</td><td>(52,701)</td></tr><tr><td>Other (expense) income, net</td><td>(85,624)</td><td>(2,418)</td><td>94,278</td></tr><tr><td>Total other expense, net</td><td>(492,482)</td><td>(341,610)</td><td>(300,005)</td></tr><tr><td>Income before provision for income taxes</td><td>51,684</td><td>116,891</td><td>87,303</td></tr><tr><td>Provision for income taxes</td><td>(4,233)</td><td>(13,237)</td><td>(11,065)</td></tr><tr><td>Net income</td><td>$ 47,451</td><td>$ 103,654</td><td>$ 76,238</td></tr><tr><td>Net income per common share:</td><td></td><td></td><td></td></tr><tr><td>Basic</td><td>$ 0.41</td><td>$ 0.86</td><td>$ 0.61</td></tr><tr><td>Diluted</td><td>$ 0.41</td><td>$ 0.86</td><td>$ 0.61</td></tr><tr><td>Weighted average common shares outstanding:</td><td></td><td></td><td></td></tr><tr><td>Basic</td><td>114,909</td><td>119,860</td><td>124,448</td></tr><tr><td>Diluted</td><td>116,515</td><td>121,022</td><td>125,144</td></tr></table>

The accompanying notes are an integral part of these consolidated financial statements.



## SBA COMMUNICATIONS CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
(in thousands)

<table><tr><td rowspan="2"></td><td colspan="4">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td><td></td></tr><tr><td>Net income</td><td>$ 47,451</td><td>$ 103,654</td><td>$ 76,238</td><td></td></tr><tr><td>Foreign currency translation adjustments</td><td>(132,445)</td><td>(9,276)</td><td>131,861</td><td></td></tr><tr><td>Comprehensive (loss) income</td><td>$ (84,994)</td><td>$ 94,378</td><td>$ 208,099</td><td></td></tr></table>

The accompanying notes are an integral part of these consolidated financial statements.



## SBA COMMUNICATIONS CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF SHAREHOLDERS' DEFICIT
(in thousands)

<table><tr><td rowspan="3"></td><td colspan="2">Class A</td><td colspan="2">Additional</td><td colspan="3">Accumulated</td></tr><tr><td colspan="2">Common Stock</td><td colspan="2">Paid-In</td><td>Accumulated</td><td colspan="2">Other</td></tr><tr><td>Shares</td><td>Amount</td><td>Capital</td><td>Deficit</td><td>Loss</td><td>Total</td><td></td></tr><tr><td>BALANCE, December 31, 2015</td><td>125,743</td><td>$ 1,257</td><td>$ 1,962,713</td><td>$ (3,168,069)</td><td>$ (502,045)</td><td>$ (1,706,144)</td><td></td></tr><tr><td>Net income</td><td>—</td><td>—</td><td>—</td><td>76,238</td><td>—</td><td>76,238</td><td></td></tr><tr><td>Common stock issued in connection with stock purchase/option plans</td><td>602</td><td>6</td><td>14,404</td><td>—</td><td>—</td><td>14,410</td><td></td></tr><tr><td>Non-cash stock compensation</td><td>—</td><td>—</td><td>33,403</td><td>—</td><td>—</td><td>33,403</td><td></td></tr><tr><td>Repurchase and retirement of common stock</td><td>(5,341)</td><td>(53)</td><td>—</td><td>(545,636)</td><td>—</td><td>(545,689)</td><td></td></tr><tr><td>Foreign currency translation adjustments</td><td>—</td><td>—</td><td>—</td><td>—</td><td>131,861</td><td>131,861</td><td></td></tr><tr><td>BALANCE, December 31, 2016</td><td>121,004</td><td>1,210</td><td>2,010,520</td><td>(3,637,467)</td><td>(370,184)</td><td>(1,995,921)</td><td></td></tr><tr><td>Net income</td><td>—</td><td>—</td><td>—</td><td>103,654</td><td>—</td><td>103,654</td><td></td></tr><tr><td>Common stock issued in connection with stock purchase/option plans</td><td>812</td><td>8</td><td>54,798</td><td>—</td><td>—</td><td>54,806</td><td></td></tr><tr><td>Non-cash stock compensation</td><td>—</td><td>—</td><td>38,844</td><td>—</td><td>—</td><td>38,844</td><td></td></tr><tr><td>Common stock issued in connection with acquisitions</td><td>488</td><td>5</td><td>63,308</td><td>—</td><td>—</td><td>63,313</td><td></td></tr><tr><td>Repurchase and retirement of common stock</td><td>(5,858)</td><td>(59)</td><td>—</td><td>(854,475)</td><td>—</td><td>(854,534)</td><td></td></tr><tr><td>Foreign currency translation adjustments</td><td>—</td><td>—</td><td>—</td><td>—</td><td>(9,276)</td><td>(9,276)</td><td></td></tr><tr><td>BALANCE, December 31, 2017</td><td>116,446</td><td>1,164</td><td>2,167,470</td><td>(4,388,288)</td><td>(379,460)</td><td>(2,599,114)</td><td></td></tr><tr><td>Net income</td><td>—</td><td>—</td><td>—</td><td>47,451</td><td>—</td><td>47,451</td><td></td></tr><tr><td>Common stock issued in connection with stock purchase/option plans</td><td>962</td><td>10</td><td>59,716</td><td>—</td><td>—</td><td>59,726</td><td></td></tr><tr><td>Non-cash stock compensation</td><td>—</td><td>—</td><td>43,140</td><td>—</td><td>—</td><td>43,140</td><td></td></tr><tr><td>Repurchase and retirement of common stock</td><td>(4,975)</td><td>(50)</td><td>—</td><td>(795,531)</td><td>—</td><td>(795,581)</td><td></td></tr><tr><td>Foreign currency translation adjustments</td><td>—</td><td>—</td><td>—</td><td>—</td><td>(132,445)</td><td>(132,445)</td><td></td></tr><tr><td>BALANCE, December 31, 2018</td><td>112,433</td><td>$ 1,124</td><td>$ 2,270,326</td><td>$ (5,136,368)</td><td>$ (511,905)</td><td>$ (3,376,823)</td><td></td></tr></table>

The accompanying notes are an integral part of these consolidated financial statements



## SBA COMMUNICATIONS CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS (in thousands)

<table><tr><td rowspan="2"></td><td colspan="4">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</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>$ 47,451</td><td>$ 103,654</td><td>$ 76,238</td><td></td></tr><tr><td>Adjustments to reconcile net income to net cash provided by operating activities:</td><td></td><td></td><td></td><td></td></tr><tr><td>Depreciation, accretion, and amortization</td><td>672,113</td><td>643,100</td><td>638,189</td><td></td></tr><tr><td>Non-cash asset impairment and decommission costs</td><td>26,192</td><td>32,423</td><td>25,693</td><td></td></tr><tr><td>Non-cash compensation expense</td><td>42,327</td><td>38,249</td><td>32,915</td><td></td></tr><tr><td>Amortization of deferred financing fees</td><td>20,289</td><td>21,940</td><td>21,136</td><td></td></tr><tr><td>Loss (gain) on remeasurement of U.S. denominated intercompany loan</td><td>89,101</td><td>8,754</td><td>(90,030)</td><td></td></tr><tr><td>Provision for doubtful accounts</td><td>551</td><td>2,909</td><td>22,516</td><td></td></tr><tr><td>Loss from extinguishment of debt, net</td><td>14,087</td><td>1,961</td><td>52,701</td><td></td></tr><tr><td>Other non-cash items reflected in the Statements of Operations</td><td>(14,586)</td><td>(4,850)</td><td>(1,225)</td><td></td></tr><tr><td>Changes in operating assets and liabilities, net of acquisitions:</td><td></td><td></td><td></td><td></td></tr><tr><td>AR and costs and est. earnings in excess of billings on uncompleted contracts, net</td><td>(29,427)</td><td>(20,893)</td><td>(7,270)</td><td></td></tr><tr><td>Prepaid expenses and other assets</td><td>(38,040)</td><td>(16,888)</td><td>(40,289)</td><td></td></tr><tr><td>Accounts payable and accrued expenses</td><td>(3,021)</td><td>3,555</td><td>(10,516)</td><td></td></tr><tr><td>Other liabilities</td><td>23,581</td><td>4,556</td><td>22,467</td><td></td></tr><tr><td>Net cash provided by operating activities</td><td>850,618</td><td>818,470</td><td>742,525</td><td></td></tr><tr><td>CASH FLOWS FROM INVESTING ACTIVITIES:</td><td></td><td></td><td></td><td></td></tr><tr><td>Acquisitions</td><td>(451,829)</td><td>(441,547)</td><td>(276,835)</td><td></td></tr><tr><td>Capital expenditures</td><td>(149,812)</td><td>(147,044)</td><td>(139,982)</td><td></td></tr><tr><td>Purchase of investments</td><td>(156,983)</td><td>(397)</td><td>(100)</td><td></td></tr><tr><td>Proceeds from sale of investments</td><td>150,890</td><td>231</td><td>712</td><td></td></tr><tr><td>Other investing activities</td><td>(10,613)</td><td>(16,350)</td><td>(12,030)</td><td></td></tr><tr><td>Net cash used in investing activities</td><td>(618,347)</td><td>(605,107)</td><td>(428,235)</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 Revolving Credit Facility</td><td>1,120,000</td><td>525,000</td><td>580,000</td><td></td></tr><tr><td>Repayments under Revolving Credit Facility</td><td>(835,000)</td><td>(875,000)</td><td>(190,000)</td><td></td></tr><tr><td>Repayment of Term Loans</td><td>(1,947,000)</td><td>(20,000)</td><td>(20,000)</td><td></td></tr><tr><td>Proceeds from issuance of Term Loans, net of fees</td><td>2,377,218</td><td>—</td><td>—</td><td></td></tr><tr><td>Payment for the redemption of 5.625% Senior Notes</td><td>—</td><td>—</td><td>(514,065)</td><td></td></tr><tr><td>Payment for the redemption of 5.75% Senior Notes</td><td>—</td><td>—</td><td>(825,795)</td><td></td></tr><tr><td>Proceeds from issuance of Senior Notes, net of fees</td><td>—</td><td>741,108</td><td>1,078,123</td><td></td></tr><tr><td>Proceeds from issuance of Tower Securities, net of fees</td><td>631,466</td><td>749,764</td><td>690,475</td><td></td></tr><tr><td>Repayment of Tower Securities</td><td>(755,000)</td><td>(610,000)</td><td>(550,000)</td><td></td></tr><tr><td>Repurchase and retirement of common stock</td><td>(795,581)</td><td>(854,534)</td><td>(545,689)</td><td></td></tr><tr><td>Other financing activities</td><td>55,360</td><td>49,088</td><td>8,394</td><td></td></tr><tr><td>Net cash used in financing activities</td><td>(148,537)</td><td>(294,574)</td><td>(288,557)</td><td></td></tr><tr><td>Effect of exchange rate changes on cash, cash equivalents, and restricted cash</td><td>(9,729)</td><td>(464)</td><td>13,618</td><td></td></tr><tr><td>NET CHANGE IN CASH, CASH EQUIVALENTS, AND RESTRICTED CASH</td><td>74,005</td><td>(81,675)</td><td>39,351</td><td></td></tr><tr><td>CASH, CASH EQUIVALENTS, AND RESTRICTED CASH:</td><td></td><td></td><td></td><td></td></tr><tr><td>Beginning of year</td><td>104,295</td><td>185,970</td><td>146,619</td><td></td></tr><tr><td>End of year</td><td>$ 178,300</td><td>$ 104,295</td><td>$ 185,970</td><td></td></tr></table>

(continued)



## SBA COMMUNICATIONS CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands)

<table><tr><td rowspan="2"></td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:</td><td></td><td></td><td></td></tr><tr><td>Cash paid during the period for:</td><td></td><td></td><td></td></tr><tr><td>Interest</td><td>$ 376,628</td><td>$ 319,562</td><td>$ 338,409</td></tr><tr><td>Income taxes</td><td>$ 21,645</td><td>$ 14,653</td><td>$ 9,655</td></tr><tr><td>SUPPLEMENTAL CASH FLOW INFORMATION OF NON-CASH ACTIVITIES:</td><td></td><td></td><td></td></tr><tr><td>Assets acquired through capital leases</td><td>$ 1,039</td><td>$ 254</td><td>$ 1,386</td></tr><tr><td>Common stock issued in connection with acquisitions</td><td>$ —</td><td>$ 63,313</td><td>$ —</td></tr></table>

The accompanying notes are an integral part of these consolidated financial statements.



# SBA COMMUNICATIONS CORPORATION AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

## 1. GENERAL

SBA Communications Corporation (the “Company” or “SBAC”) was incorporated in the State of Florida in March 1997. The Company is a holding company that holds all of the outstanding capital stock of SBA Telecommunications, LLC (“Telecommunications”). Telecommunications is a holding company that holds the outstanding capital stock of SBA Senior Finance, LLC (“SBA Senior Finance”), and other operating subsidiaries which are not a party to any loan agreement. SBA Senior Finance is a holding company that holds, directly or indirectly, the equity interest in certain subsidiaries that issued the Tower Securities (see Note 12) and certain subsidiaries that were not involved in the issuance of the Tower Securities. With respect to the subsidiaries involved in the issuance of the Tower Securities, SBA Senior Finance is the sole member of SBA Holdings, LLC and SBA Depositor, LLC. SBA Holdings, LLC is the sole member of SBA Guarantor, LLC. SBA Guarantor, LLC directly or indirectly holds all of the capital stock of the companies referred to as the “Borrowers” under the Tower Securities. With respect to subsidiaries not involved in the issuance of the Tower Securities, SBA Senior Finance holds all of the membership interests in SBA Senior Finance II, LLC (“SBA Senior Finance II”) and certain non-operating subsidiaries. SBA Senior Finance II holds, directly or indirectly, all the capital stock of certain international subsidiaries and certain other tower companies (known as “Tower Companies”). SBA Senior Finance II also holds, directly or indirectly, all the capital stock and/or membership interests of certain other subsidiaries involved in providing services, including SBA Network Services, LLC (“Network Services”) as well as SBA Network Management, Inc. (“Network Management”) which manages and administers the operations of the Borrowers.

As of December 31, 2018, the Company owned and operated wireless towers in the United States and its territories. In addition, the Company owned towers in Argentina, Brazil, Canada, Chile, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Nicaragua, Panama, and Peru. Space on these towers is leased primarily to wireless service providers. As of December 31, 2018, the Company owned and operated 29,578 towers of which 16,263 are domestic and 13,315 are international.

## 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

A summary of the significant accounting policies applied in the preparation of the accompanying consolidated financial statements is as follows:

## Principles of Consolidation

The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include the Company and its majority and wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation.

## Use of Estimates

The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. The significant estimates made by management relate to the allowance for doubtful accounts, the costs and revenue relating to the Company’s construction contracts, stock-based compensation assumptions, valuation allowance related to deferred tax assets, fair value of long-lived assets, the useful lives of towers and intangible assets, anticipated property tax assessments, fair value of investments and asset retirement obligations. Management develops estimates based on historical experience and on various assumptions about the future that are believed to be reasonable based on the information available. These estimates ultimately may differ from actual results and such differences could be material.

## Cash and Cash Equivalents

Cash and cash equivalents consist primarily of cash in banks, money market funds, commercial paper, highly liquid short-term investments, and other marketable securities with an original maturity of three months or less at the time of purchase. These investments are carried at cost, which approximates fair value.

## Restricted Cash

The Company classifies all cash pledged as collateral to secure certain obligations and all cash whose use is limited as restricted cash. This includes cash held in escrow to fund certain reserve accounts relating to the Tower Securities as well as for payment and



performance bonds and surety bonds issued for the benefit of the Company in the ordinary course of business, as well as collateral associated with workers' compensation plans (see Note 4).

## Investments

Investment securities with original maturities of more than three months but less than one year at time of purchase are considered short-term investments. The Company’s short-term investments primarily consist of certificates of deposit with maturities of less than a year. Investment securities with maturities of more than a year are considered long-term investments and are classified in other assets on the accompanying Consolidated Balance Sheets. Long-term investments primarily consist of U.S. Treasuries, mutual funds, and preferred securities. Gross purchases and sales of the Company’s investments are presented within “Cash flows from investing activities” on the Company’s Consolidated Statements of Cash Flows.

The Company accounts for its investments in privately held companies under the equity method. The Company evaluates its investments for impairment at least annually. The Company determines the fair value of its investments by considering available evidence, including general market conditions, the investee’s financial condition, near-term prospects, market comparables and subsequent rounds of financing. The Company measures and records its investments at fair value when they are deemed to be other-than-temporarily impaired. The Company did not recognize any impairment loss associated with its investments during the years ended December 31, 2018, 2017, and 2016.

During the years ended December 31, 2018 and 2017, the Company received proceeds related to the sale or maturity of investments of $150.9 million and $0.2 million, respectively. During the year ended December 31, 2018 and 2017, no gain or loss was recorded related to the sale or maturity of investments. The proceeds are reflected in Net cash used in investing activities on the Consolidated Statements of Cash Flows. The aggregate carrying value of the Company’s investments was approximately $14.6 million and $8.6 million as of December 31, 2018 and 2017, respectively, and is classified within prepaid and other current assets and other assets on the Company’s consolidated balance sheets.

## Property and Equipment

Property and equipment are recorded at cost or at estimated fair value (in the case of acquired properties), adjusted for asset impairment and estimated asset retirement obligations. Costs for self-constructed towers include direct materials and labor, indirect costs and capitalized interest. Approximately $0.9 million, $1.1 million, and $1.0 million of interest cost was capitalized in 2018, 2017 and 2016, respectively.

Depreciation on towers and related components is provided using the straight-line method over the estimated useful lives, not to exceed the minimum lease term of the underlying ground lease. The Company defines the minimum lease term as the shorter of the period from lease inception through the end of the term of all tenant lease obligations in existence at ground lease inception, including renewal periods, or the ground lease term, including renewal periods. If no tenant lease obligation exists at the date of ground lease inception, the initial term of the ground lease is considered the minimum lease term. Leasehold improvements are amortized on a straight-line basis over the shorter of the useful life of the improvement or the minimum lease term of the lease. For all other property and equipment, depreciation is provided using the straight-line method over the estimated useful lives.

The Company performs ongoing evaluations of the estimated useful lives of its property and equipment for depreciation purposes. The estimated useful lives are determined and continually evaluated based on the period over which services are expected to be rendered by the asset. If the useful lives of assets are reduced, depreciation may be accelerated in future years. Property and equipment under capital leases are amortized on a straight-line basis over the term of the lease or the remaining estimated life of the leased property, whichever is shorter, and the related amortization is included in depreciation expense. Expenditures for maintenance and repair are expensed as incurred.

Asset classes and related estimated useful lives are as follows:

<table><tr><td>Towers and related components</td><td>3 - 15 years</td></tr><tr><td>Furniture, equipment and vehicles</td><td>2 - 7 years</td></tr><tr><td>Buildings and improvements</td><td>10 - 30 years</td></tr></table>

Betterments, improvements, and significant repairs, which increase the value or extend the life of an asset, are capitalized and depreciated over the estimated useful life of the respective asset. Changes in an asset’s estimated useful life are accounted for prospectively, with the book value of the asset at the time of the change being depreciated over the revised remaining useful life. There has been no material impact for changes in estimated useful lives for any years presented.



## Deferred Financing Fees

Financing fees related to the issuance of debt have been deferred and are being amortized using the effective interest rate method over the expected duration of the related indebtedness (see Note 12). For all of the Company’s debt, except for the Revolving Credit Facility where the debt issuance costs are being presented as an asset on the accompanying Consolidated Balance Sheet, debt issuance costs are presented on the balance sheet as a direct deduction from the related debt liability rather than as an asset.

## Deferred Lease Costs

The Company defers certain initial direct costs associated with the origination of tenant leases and lease amendments and amortizes these costs over the initial lease term or over the lease term remaining if related to a lease amendment. Such deferred costs were approximately $11.3 million, $11.0 million, and $10.2 million in 2018, 2017, and 2016, respectively. Amortization expense was $12.2 million, $13.1 million, and $11.3 million for the years ended December 31, 2018, 2017 and 2016, respectively, and is included in cost of site leasing on the accompanying Consolidated Statements of Operations. As of December 31, 2018 and 2017, unamortized deferred lease costs were $27.0 million and $27.7 million, respectively, and are included in other assets on the accompanying Consolidated Balance Sheets.

Effective January 1, 2019, the Company adopted ASU 2016-02, Leases, which changed how deferred lease costs are calculated. Refer to “Recent Accounting Pronouncements Not Yet Adopted” for further changes related to the adoption of this guidance.

## Intangible Assets

The Company classifies as intangible assets the fair value of current leases in place at the acquisition date of towers and related assets (referred to as the “Current contract intangibles”), and the fair value of future tenant leases anticipated to be added to the acquired towers (referred to as the “Network location intangibles”). These intangibles are estimated to have a useful life consistent with the useful life of the related tower assets, which is typically 15 years. For all intangible assets, amortization is provided using the straight-line method over the estimated useful lives as the benefit associated with these intangible assets is anticipated to be derived evenly over the life of the asset.

## Impairment of Long-Lived Assets

The Company evaluates its individual long-lived and related assets with finite lives for indicators of impairment to determine when an impairment analysis should be performed. The Company evaluates its tower assets and Current contract intangibles at the tower level, which is the lowest level for which identifiable cash flows exists. The Company evaluates its Network location intangibles for impairment at the tower leasing business level whenever indicators of impairment are present. The Company has established a policy to at least annually evaluate its tower assets and Current contract intangibles for impairment.

The Company records an impairment charge when an investment in towers or related assets has been impaired, such that future undiscounted cash flows would not recover the then current carrying value of the investment in the tower and related intangible. If the future undiscounted cash flows are lower than the carrying value of the investment in the tower and related intangible, the Company calculates future discounted cash flows and compares those amounts to the carrying value. The Company records an impairment charge for any amounts lower than the carrying value. Estimates and assumptions inherent in the impairment evaluation include, but are not limited to, general market and economic conditions, historical operating results, geographic location, lease-up potential and expected timing of lease-up. In addition, the Company makes certain assumptions in determining an asset’s fair value for the purpose of calculating the amount of an impairment charge.

The Company recognized impairment charges of $27.1 million, $36.7 million, and $30.2 million for the years ended December 31, 2018, 2017 and 2016, respectively. Refer to Note 3 for further detail of these amounts.



## Fair Value Measurements

The Company determines the fair market values 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. The following three levels of inputs 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.

## Revenue Recognition and Accounts Receivable

Revenue from site leasing is recognized on a straight-line basis over the current term of the related lease agreements, which are generally five to ten years. Receivables recorded related to the straight-line impact of site leases are reflected in other assets on the Consolidated Balance Sheets. Rental amounts received in advance are recorded as deferred revenue on the Consolidated Balance Sheets. Revenues from site leasing represent 93% of the Company’s total revenues.

Site development projects in which the Company performs consulting services include contracts on a fixed price basis that are billed at contractual rates. Revenue is recognized over time based on milestones achieved, which are determined based on costs incurred. Amounts billed in advance (collected or uncollected) are recorded as deferred revenue on the Consolidated Balance Sheets.

Revenue from construction projects is recognized over time, determined by the percentage of cost incurred to date compared to management’s estimated total cost for each contract. This method is used because management considers total cost to be the best available measure of progress on the contracts. These amounts are based on estimates, and the uncertainty inherent in the estimates initially is reduced as work on the contracts nears completion. Refer to Note 9 for further detail of costs and estimated earnings in excess of billings on uncompleted contracts. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined to be probable.

The site development segment represents approximately 7% of the Company’s total revenues. The Company accounts for site development revenue in accordance with ASC 606, Revenue from Contracts with Customers, which was adopted on January 1, 2018 by applying the modified retrospective transition method. Payment terms do not result in any significant financing arrangements. Furthermore, these contracts do not typically include variable consideration; therefore, the transaction price that is recognized over time is generally the amount of the total contract. The cumulative effect of initially applying the new revenue standard had no impact on the Company’s financial results. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. The adoption of the new standard will have no impact to net income on an ongoing basis.

The accounts receivable balance was $111.0 million and $90.7 million as of December 31, 2018 and 2017, respectively, of which $27.1 million and $20.8 million related to the site development segment as of December 31, 2018 and 2017, respectively. Refer to Note 18 for further detail of the site development segment.

## Allowance for Doubtful Accounts

The Company performs periodic credit evaluations of its customers. The Company monitors collections and payments from its customers and maintains a provision for estimated credit losses based upon historical experience, specific customer collection issues identified, and past due balances as determined based on contractual terms. Interest is charged on outstanding receivables from customers on a case by case basis in accordance with the terms of the respective contracts or agreements with those customers. Amounts determined to be uncollectible are written off against the allowance for doubtful accounts in the period in which uncollectibility is determined to be probable.



The following is a rollforward of the allowance for doubtful accounts:

<table><tr><td rowspan="2"></td><td colspan="4">For the year ended December 31,</td></tr><tr><td>2018</td><td colspan="2">2017</td><td>2016</td></tr><tr><td></td><td></td><td colspan="3">(in thousands)</td></tr><tr><td>Beginning balance</td><td>$ 26,481</td><td>$ 24,518</td><td>$ 1,681</td><td></td></tr><tr><td>Provision for doubtful accounts</td><td>551</td><td>2,909</td><td>22,516</td><td></td></tr><tr><td>Write-offs, net of recoveries</td><td>(591)</td><td>(647)</td><td>(614)</td><td></td></tr><tr><td>Currency translation adjustment</td><td>(2,561)</td><td>(299)</td><td>935</td><td></td></tr><tr><td>Ending balance</td><td>$ 23,880</td><td>$ 26,481</td><td>$ 24,518</td><td></td></tr></table>

On June 20, 2016, Oi, S.A. (“Oi”), the Company’s largest customer in Brazil, filed a petition for judicial reorganization in Brazil. Prior to the filing of the reorganization petition, Oi was current in all payment obligations to the Company through April 30, 2016. Due to the uncertainty surrounding the recoverability of amounts owed by Oi relating to services provided prior to the date of Oi’s petition, the Company has recorded a $16.5 million bad debt provision (the “Oi reserve”) which covers amounts owed or potentially owed by Oi as of the filing date. The Oi reserve was recorded in Selling, general, and administrative expense on the consolidated statement of operations for the year ended December 31, 2016. Under Brazilian law governing judicial reorganizations, the contracts governing post-petition obligations such as tower rents remain unchanged, and debtors do not have the ability to reject or terminate the contracts other than pursuant to their original terms. Since the filing, the Company has received all rental payments due in connection with obligations of Oi accruing post-petition. On January 8, 2018, Oi’s reorganization plan was approved by the Brazilian courts and Oi is expected to fully resolve all its pre-petition obligations in accordance with the terms of the plan, which includes a 10% reduction in the receivable and four annual installment payments beginning in December 2019.

## Cost of Revenue

Cost of site leasing revenue includes ground lease rent, property taxes, amortization of deferred lease costs, maintenance and other tower operating expenses. All ground lease rental obligations due to be paid out over the lease term, including fixed escalations, are recorded on a straight-line basis over the minimum lease term. Liabilities recorded related to the straight-lining of ground leases are reflected in other long-term liabilities on the Consolidated Balance Sheets. Cost of site development revenue includes the cost of materials, salaries and labor costs, including payroll taxes, subcontract labor, vehicle expense and other costs directly and indirectly related to the projects. All costs related to site development projects are recognized as incurred.

## Income Taxes

The Company recognizes deferred tax assets and liabilities for the estimated future tax consequences attributable to differences between the financial reporting and tax bases of existing assets and liabilities. Deferred tax assets and liabilities are measured using tax rates in effect for the year in which the temporary differences are expected to reverse. A valuation allowance is recorded to reduce the carrying amounts of deferred tax assets if it is "more-likely-than-not" that those assets will not be realized. The Company considers many factors when assessing the likelihood of future realization, including the Company's recent cumulative earnings by taxing jurisdiction, expectations of future taxable income, prudent and feasible tax planning strategies that are available, the carryforward periods available to the Company for tax reporting purposes and other relevant factors.

The Company began operating as a REIT for federal income tax purposes effective January 1, 2016. As a REIT, the Company generally is not subject to corporate level federal income tax on taxable income it distributes to its stockholders as long as it meets the organizational and operational requirements under the REIT rules. However, certain subsidiaries have made an election with the IRS to be treated as a taxable REIT subsidiary (“TRS”) in conjunction with the Company’s REIT election. The TRS elections permit SBA to engage in certain business activities in which the REIT may not engage directly, so long as these activities are conducted in entities that elect to be treated as TRSs under the Code. A TRS is subject to federal and state income taxes on the income from these activities. Additionally, the Company has included in TRSs the Company’s tower operations in most foreign jurisdictions; however, the REIT holds selected tower assets in Puerto Rico and USVI. Those operations will continue to be subject to foreign taxes in the jurisdiction in which such assets and operations are located regardless of whether they are included in a TRS.

The Company will continue to file separate federal tax returns for the REIT and TRS for the year ended December 31, 2018. The REIT had taxable income and utilized net operating losses (“NOLs”) to offset its 2018 distribution requirement. Some of our



TRSs generated NOLs which will be carried forward to use in future years. The deferred tax asset generated by the NOLs are fully reserved by a valuation allowance.

The Company records a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in a tax return if applicable. The Company has not identified any tax exposures that require a reserve. To the extent that the Company records unrecognized tax exposures, any related interest and penalties will be recognized as interest expense in the Company’s Consolidated Statements of Operations.

## Stock-Based Compensation

The Company measures and recognizes compensation expense for all share-based payment awards made to employees and directors, including stock options, restricted stock units and employee stock purchases under employee stock purchase plans. The Company records compensation expense, for stock options and restricted stock units on a straight-line basis over the vesting period. Compensation expense for employee stock options is based on the estimated fair value of the options on the date of the grant using the Black-Scholes option-pricing model. Compensation expense for restricted stock units is based on the fair market value of the units awarded at the date of the grant.

## Asset Retirement Obligations

The Company has entered into ground leases for the land underlying the majority of the Company’s towers. A majority of these leases require the Company to restore land interests to their original condition upon termination of the ground lease.

The Company recognizes asset retirement obligations in the period in which they are incurred, if a reasonable estimate of a fair value can be made, and accretes such liability through the obligation’s estimated settlement date. The associated asset retirement costs are capitalized as part of the carrying amount of the related tower fixed assets, and over time, the liability is accreted to its present value each period and the capitalized cost is depreciated over the estimated useful life of the tower.

As of December 31, 2018 and 2017, the asset retirement obligation was $9.9 million and $7.2 million, respectively, and is included in other long-term liabilities on the Consolidated Balance Sheets. Upon settlement of the obligations, any difference between the cost to retire an asset and the recorded liability is recorded in the Consolidated Statements of Operations. In determining the measurement of the asset retirement obligations, the Company considered the nature and scope of the contractual restoration obligations contained in the Company’s ground leases, the historical retirement experience as an indicator of future restoration probabilities, intent in renewing existing ground leases through lease termination dates, current and future value and timing of estimated restoration costs and the credit adjusted risk-free rate used to discount future obligations.

## Comprehensive Income (Loss)

Comprehensive income (loss) is defined as the change in equity (net assets) of a business enterprise during a period from transactions and other events and circumstances from non-owner sources, and is comprised of net income (loss) and other foreign currency adjustments.

## Foreign Currency Translation

All assets and liabilities of foreign subsidiaries that do not utilize the U.S. dollar as its functional currency are translated at period-end rates of exchange, while revenues and expenses are translated at monthly average rates of exchange prevailing during the year. Unrealized remeasurement gains and losses are reported as foreign currency translation adjustments through Accumulated Other Comprehensive Loss in the accompanying Consolidated Statement of Shareholders' Deficit.

For foreign subsidiaries where the U.S. dollar is the functional currency, monetary assets and liabilities of such subsidiaries, which are not denominated in U.S. dollars, are remeasured at exchange rates in effect at the balance sheet date, and revenues and expenses are remeasured at monthly average rates prevailing during the year. Unrealized translation gains and losses are reported as other income (expense), net in the Consolidated Statement of Operations.

## Acquisitions

In January 2017, the FASB issued ASU 2017-01, Clarifying the Definition of a Business. ASU 2017-01 provides revised guidance to determine when an acquisition meets the definition of a business or when the acquisition should be accounted for as an



asset acquisition. The Company adopted this standard effective January 1, 2017 and all changes are being accounted for prospectively. The adoption of ASU 2017-01 did not have a material impact on the Company’s unaudited consolidated financial statements and related disclosures.

Under the new standard, the Company’s acquisitions will generally qualify for asset acquisition treatment under ASC 360, Property, Plant, and Equipment, rather than business combination treatment under ASC 805 Business Combinations. For acquisitions, the aggregate purchase price is allocated on a relative fair value basis to towers and related intangible assets. The fair values 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. The fair value estimates are based on available historical information and on future expectations and assumptions deemed reasonable by management at the time. For acquisitions, if the actual results differ from the estimates and judgments used in these fair values, the amounts recorded in the consolidated financial statements could be subject to a possible impairment of the intangible assets, or require acceleration of the amortization expense of intangible assets in subsequent periods. For acquisitions, external, direct transaction costs will be capitalized as a component of the cost of the asset acquired. The Company will continue to expense internal acquisition costs as incurred. For business combinations, the estimates of the fair value of the assets acquired and liabilities assumed at the date of an acquisition are subject to adjustment during the measurement period (up to one year from the particular acquisition date). During the measurement period, the Company will adjust assets and/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 a revised estimated value of those assets and/or liabilities as of that date. As of December 31, 2018, there were no purchase price allocations that were preliminary.

In connection with certain acquisitions, the Company may agree to pay contingent consideration (or earnouts) in cash or stock if the communication sites or businesses that are acquired meet or exceed certain performance targets over a period of one to three years after they have been acquired. The Company accrues for contingent consideration in connection with business combinations at fair value as of the date of the acquisition. All subsequent changes in fair value of contingent consideration payable in cash are recorded through Consolidated Statements of Operations. Contingent consideration in connection with asset acquisitions will be recognized at the time when the contingency is resolved or becomes payable and will increase the cost basis of the assets acquired.

## Intercompany Loans Subject to Remeasurement

The Company has two wholly owned subsidiaries, Brazil Shareholder I, LLC, a Florida limited liability company, and SBA Torres Brasil, Limitada, a limited liability company existing under the laws of the Republic of Brazil, which have entered into intercompany loan agreements pursuant to which the entities may from time to time agree to lend/borrow amounts under the terms of each agreement. The first agreement entered into in November 2014 was for $750.0 million and was created to fund the acquisition of 1,641 towers in Brazil. The second agreement entered into in December 2017 was for $500.0 million and was created to fund the acquisition of 941 towers in Brazil.

In accordance with Accounting Standards Codification (ASC) 830, the Company remeasures foreign denominated intercompany loans with the corresponding change in the balance being recorded in Other income (expense), net in the Consolidated Statement of Operations as settlement is anticipated or planned in the foreseeable future. For the years ended December 31, 2018, 2017, and 2016, the Company recorded a $89.1 million loss, a $8.8 million loss, and a $90.0 million gain, respectively, on the remeasurement of intercompany loans due to changes in foreign exchange rates. As of December 31, 2018 and 2017, the aggregate amount outstanding under the two intercompany loan agreements with the Company’s Brazilian subsidiary was $536.9 million and $560.9 million, respectively.

## Recent Accounting Pronouncements Not Yet Adopted

In February 2016, the FASB issued ASU 2016-02, Leases. The standard requires lessees to recognize a right-of-use asset and a lease liability, initially measured at the present value of the lease payments for all leases with a term greater than 12 months. The accounting for lessors remains largely unchanged from existing guidance. The Company has adopted this standard as of January 1, 2019. This guidance will have a material impact on the Company’s consolidated balance sheet due to the recognition of lease liabilities for its ground leases of approximately $2.3 billion to $2.7 billion. Adoption of this guidance will not have a significant impact on the Company’s lease classification, a material impact on its consolidated statement of operations, or a notable impact on its liquidity. Additionally, the standard will have no impact on the Company’s debt-covenant compliance under its current agreements.

In July 2018, the FASB issued additional guidance on the accounting for leases. The guidance provides companies with another transition method that allows entities to recognize a cumulative-effect adjustment to the opening balance of retained earnings as of the date of adoption. Under this method, previously presented years' financial positions and results are not adjusted. The Company adopted this alternative transition method. The new guidance also provides lessors with a practical expedient, by class of underlying asset, to not separate non-lease components from the associated lease component if (1) the non-lease components would otherwise be



accounted for under the new revenue recognition standard, (2) both the timing and pattern of transfer are the same for the non-lease components and associated lease component, and (3) if accounted for separately, the lease component would be classified as an operating lease. The Company adopted this practical expedient in its accounting for leases.

## 3. FAIR VALUE MEASUREMENTS

Items Measured at Fair Value on a Recurring Basis— The Company’s earnout liabilities related to business combinations are measured at fair value on a recurring basis using Level 3 inputs and are recorded in Accrued expenses in the accompanying Consolidated Balance Sheets. Changes in estimates are recorded in Acquisition related adjustments and expenses in the accompanying Consolidated Statement of Operations. The Company determines the fair value of earnouts (contingent consideration) and any subsequent changes in fair value using a discounted probability-weighted approach using Level 3 inputs. Level 3 valuations rely on unobservable inputs for the asset or liability, and include situations where there is little, if any, market activity for the asset or liability. The fair value of the earnouts is reviewed quarterly and is based on the payments the Company expects to make based on historical internal observations related to the anticipated performance of the underlying assets. The Company’s estimate of the fair value of its obligation contained in acquisitions prior to January 1, 2017 (adoption of ASU 2017-01) was $0.5 million and $2.5 million as of December 31, 2018 and 2017, respectively. The maximum potential obligation related to the performance targets for these acquisitions was $0.7 million and $3.1 million as of December 31, 2018 and 2017, respectively. The maximum potential obligation related to the performance targets for acquisitions after January 1, 2017, which have not been recorded on the Company’s Consolidated Balance Sheet, were $13.3 million and $11.1 million as of December 31, 2018 and 2017.

The Company’s asset retirement obligations are measured at fair value on a recurring basis using Level 3 inputs and are recorded in Other long-term liabilities in the accompanying Consolidated Balance Sheets. The fair value of the asset retirement obligations is calculated using a discounted cash flow model.

Items Measured at Fair Value on a Nonrecurring Basis— The Company’s long-lived and intangible assets are measured at fair value on a nonrecurring basis using Level 3 inputs. The Company considers many factors and makes certain assumptions when making this assessment, including but not limited to: general market and economic conditions, historical operating results, geographic location, lease-up potential and expected timing of lease-up. The fair value of the long-lived and intangible assets is calculated using a discounted cash flow model.

Asset impairment and decommission costs for all periods presented and the related impaired assets primarily relate to the Company’s site leasing operating segment. The following summarizes the activity of asset impairment and decommission costs (in thousands):

<table><tr><td rowspan="2"></td><td colspan="4">For the year</td></tr><tr><td colspan="4">ended December 31,</td></tr><tr><td></td><td>2018</td><td>2017</td><td>2016</td><td></td></tr><tr><td>Asset impairment (1)</td><td>$     14,350</td><td>$     15,389</td><td>$     19,217</td><td></td></tr><tr><td>Write-off of carrying value of decommissioned towers</td><td>10,795</td><td>16,861</td><td>12,967</td><td></td></tr><tr><td>Gain on sale of fiber assets (2)</td><td>—</td><td>—</td><td>(8,919)</td><td></td></tr><tr><td>Other (including third party decommission costs)</td><td>1,989</td><td>4,447</td><td>6,977</td><td></td></tr><tr><td>Total asset impairment and decommission costs</td><td>$     27,134</td><td>$     36,697</td><td>$     30,242</td><td></td></tr></table>

(1) Represents impairment charges resulting from the Company’s regular analysis of whether the future cash flows from certain towers are adequate to recover the carrying value of the investment in those towers.

(2) Gain recognized on the sale of fiber assets acquired in the 2012 Mobility transaction.

Fair Value of Financial Instruments— The carrying values of cash and cash equivalents, accounts receivable, restricted cash, accounts payable, and short-term investments approximate their estimated fair values due to the short maturity of these instruments. Short-term investments consisted of $0.2 million in Treasury securities as of December 31, 2018 and 2017. The Company’s estimate of the fair value of its held-to-maturity investments in treasury and corporate bonds, including current portion, are based primarily upon Level 1 reported market values. As of December 31, 2018, the carrying value and fair value of the held-to-maturity investments, including current portion, were $0.2 million. As of December 31, 2017, the carrying value and fair value of the held-to-maturity investments, including current portion, were $0.5 million. The current portion is recorded in Prepaid and other current assets in the accompanying Consolidated Balance Sheets, while held-to-maturity investments are recorded in Other assets. For the year ended December 31, 2018, the Company purchased $150.0 million and sold $150.2 million of short-term investments.



The Company determines fair value of its debt instruments utilizing various Level 2 sources including quoted prices and indicative quotes (non-binding quotes) from brokers that require judgment to interpret market information including implied credit spreads for similar borrowings on recent trades or bid/ask prices. The fair value of the Revolving Credit Facility is considered to approximate the carrying value because the interest payments are based on Eurodollar rates that reset monthly or more frequently. The Company does not believe its credit risk has changed materially from the date the applicable Eurodollar Rate was set for the Revolving Credit Facility (112.5 to 175.0 basis points). Refer to Note 12 for the fair values, principal balances, and carrying values of the Company’s debt instruments.

## 4. RESTRICTED CASH

The cash, cash equivalents, and restricted cash balances on the consolidated statement of cash flows consists of the following:

<table><tr><td></td><td>As of</td><td>As of</td><td>As of</td><td></td></tr><tr><td></td><td>December 31, 2018</td><td>December 31, 2017</td><td>December 31, 2016</td><td>Included on Balance Sheet</td></tr><tr><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>Cash and cash equivalents</td><td>$ 143,444</td><td>$ 68,783</td><td>$ 146,109</td><td></td></tr><tr><td>Securitization escrow accounts</td><td>32,261</td><td>32,699</td><td>36,607</td><td>Restr. cash - current asset</td></tr><tr><td>Payment and performance bonds</td><td>203</td><td>225</td><td>179</td><td>Restr. cash - current asset</td></tr><tr><td>Surety bonds and workers compensation</td><td>2,392</td><td>2,588</td><td>3,075</td><td>Other assets - noncurrent</td></tr><tr><td>Total cash, cash equivalents, and restr. cash</td><td>$ 178,300</td><td>$ 104,295</td><td>$ 185,970</td><td></td></tr></table>

Pursuant to the terms of the Tower Securities (see Note 12), the Company is required to establish a securitization escrow account, held by the indenture trustee, into which all rents and other sums due on the towers that secure the Tower Securities are directly deposited by the lessees. These restricted cash amounts are used to fund reserve accounts for the payment of (1) debt service costs, (2) ground rents, real estate and personal property taxes and insurance premiums related to towers, (3) trustee and servicing expenses, and (4) management fees. The restricted cash in the securitization escrow account in excess of required reserve balances is subsequently released to the Borrowers (as defined in Note 12) monthly, provided that the Borrowers are in compliance with their debt service coverage ratio and that no event of default has occurred. All monies held by the indenture trustee are classified as restricted cash on the Company’s Consolidated Balance Sheets.

Payment and performance bonds relate primarily to collateral requirements for tower construction currently in process by the Company. Cash is pledged as collateral related to surety bonds issued for the benefit of the Company or its affiliates in the ordinary course of business and primarily related to the Company’s tower removal obligations. As of December 31, 2018 and 2017, the Company had $40.5 million and $39.5 million in surety, payment and performance bonds, respectively, for which no collateral was required to be posted. The Company periodically evaluates the collateral posted for its bonds to ensure that it meets the minimum requirements. As of December 31, 2018 and 2017, the Company had also pledged $2.2 and $2.5 million, respectively, as collateral related to its workers compensation policy.

## 5. PREPAID EXPENSES AND OTHER CURRENT ASSETS AND OTHER ASSETS

The Company’s prepaid expenses and other current assets are comprised of the following:

<table><tr><td></td><td>As of</td><td>As of</td></tr><tr><td></td><td>December 31, 2018</td><td>December 31, 2017</td></tr><tr><td></td><td colspan="2">(in thousands)</td></tr><tr><td>Prepaid ground rent</td><td>$     34,276</td><td>$     32,505</td></tr><tr><td>Loan receivables</td><td>11,178</td><td>948</td></tr><tr><td>Other</td><td>17,672</td><td>16,263</td></tr><tr><td>Total prepaid expenses and other current assets</td><td>$     63,126</td><td>$     49,716</td></tr></table>



The Company’s other assets are comprised of the following:

<table><tr><td rowspan="2"></td><td colspan="2">As of</td><td colspan="2">As of</td></tr><tr><td colspan="2">December 31, 2018</td><td colspan="2">December 31, 2017</td></tr><tr><td></td><td colspan="4">(in thousands)</td></tr><tr><td>Prepaid ground rent</td><td>$     263,694</td><td>$     220,493</td><td></td><td></td></tr><tr><td>Straight-line rent receivable</td><td>322,073</td><td>313,650</td><td></td><td></td></tr><tr><td>Loan receivables</td><td>49,255</td><td>52,383</td><td></td><td></td></tr><tr><td>Deferred lease costs, net</td><td>27,020</td><td>27,703</td><td></td><td></td></tr><tr><td>Deferred tax asset - long term</td><td>18,330</td><td>1,670</td><td></td><td></td></tr><tr><td>Other</td><td>41,661</td><td>34,296</td><td></td><td></td></tr><tr><td>Total other assets</td><td>$     722,033</td><td>$     650,195</td><td></td><td></td></tr></table>

## 6. ACQUISITIONS

The following table summarizes the Company’s acquisition activity:

<table><tr><td rowspan="2"></td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>Tower acquisitions (number of towers)</td><td>1,316</td><td>1,425</td><td>531</td></tr></table>

The following table summarizes the Company’s cash acquisition capital expenditures:

<table><tr><td rowspan="2"></td><td colspan="4">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td><td></td></tr><tr><td></td><td colspan="4">(in thousands)</td></tr><tr><td>Acquisitions of towers and related intangible assets (1)</td><td>$     406,699</td><td>$     392,902</td><td>$     214,686</td><td></td></tr><tr><td>Land buyouts and other assets (2)</td><td>45,130</td><td>48,645</td><td>62,149</td><td></td></tr><tr><td>Total cash acquisition capital expenditures</td><td>$     451,829</td><td>$     441,547</td><td>$     276,835</td><td></td></tr></table>

(1) The year ended December 31, 2017 excludes $63.3 million of acquisition costs funded through the issuance of 487.963 shares of Class A common stock.

(2) In addition, the Company paid $24.3 million, $18.8 million, and $14.1 million for ground lease extensions and term easements on land underlying the Company’s towers during the years ending December 31, 2018, 2017, and 2016, respectively. The Company recorded these amounts in prepaid rent on its Consolidated Balance Sheets.

During the year ended December 31, 2018, the Company acquired 1,316 completed towers and related assets and liabilities consisting of $134.5 million of property and equipment, $280.7 million of intangible assets, and $8.5 million of working capital adjustments.

During the year ended December 31, 2017, the Company acquired 1,425 completed towers and related assets and liabilities consisting of $114.7 million of property and equipment, $345.3 million of intangible assets, and $3.8 million of working capital adjustments.

During the year ended December 31, 2016, the Company acquired 531 completed towers and related assets and liabilities for $214.7 million in cash consisting of $72.8 million of property and equipment, $144.4 million of intangible assets, and $2.5 million of working capital adjustments.



Subsequent to December 31, 2018, the Company acquired 27 towers and related assets for $10.7 million in cash.

## 7. INTANGIBLE ASSETS, NET

The following table provides the gross and net carrying amounts for each major class of intangible assets:

<table><tr><td rowspan="2"></td><td colspan="3">As of December 31, 2018</td><td colspan="3">As of December 31, 2017</td></tr><tr><td>Gross carrying amount</td><td>Accumulated amortization</td><td>Net book value</td><td>Gross carrying amount</td><td>Accumulated amortization</td><td>Net book value</td></tr><tr><td></td><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td></tr><tr><td>Current contract intangibles</td><td>$ 4,394,416</td><td>$ (1,928,030)</td><td>$ 2,466,386</td><td>$ 4,355,171</td><td>$ (1,673,270)</td><td>$ 2,681,901</td></tr><tr><td>Network location intangibles</td><td>1,669,859</td><td>(804,780)</td><td>865,079</td><td>1,617,441</td><td>(701,211)</td><td>916,230</td></tr><tr><td>Intangible assets, net</td><td>$ 6,064,275</td><td>$ (2,732,810)</td><td>$ 3,331,465</td><td>$ 5,972,612</td><td>$ (2,374,481)</td><td>$ 3,598,131</td></tr></table>

All intangible assets noted above are included in the Company’s site leasing segment. The Company amortizes its intangible assets using the straight-line method over 15 years. Amortization expense relating to the intangible assets above was $402.6 million, $384.1 million, and $369.9 million for the years ended December 31, 2018, 2017 and 2016, respectively.

Estimated amortization expense on the Company’s intangibles assets is as follows:

<table><tr><td>For the year ended December 31,</td><td>(in thousands)</td></tr><tr><td>2019</td><td>$ 403,371</td></tr><tr><td>2020</td><td>402,447</td></tr><tr><td>2021</td><td>369,864</td></tr><tr><td>2022</td><td>349,657</td></tr><tr><td>2023</td><td>327,181</td></tr></table>

## 8. PROPERTY AND EQUIPMENT, NET

Property and equipment, net (including vehicles held under capital leases) consists of the following:

<table><tr><td></td><td>As of December 31, 2018</td><td>As of December 31, 2017</td></tr><tr><td></td><td>(in thousands)</td><td></td></tr><tr><td>Towers and related components</td><td>$ 4,951,321</td><td>$ 4,772,807</td></tr><tr><td>Construction-in-process</td><td>35,756</td><td>34,689</td></tr><tr><td>Furniture, equipment, and vehicles</td><td>54,814</td><td>53,260</td></tr><tr><td>Land, buildings, and improvements</td><td>668,459</td><td>630,370</td></tr><tr><td>Total property and equipment</td><td>5,710,350</td><td>5,491,126</td></tr><tr><td>Less: accumulated depreciation</td><td>(2,923,995)</td><td>(2,678,780)</td></tr><tr><td>Property and equipment, net</td><td>$ 2,786,355</td><td>$ 2,812,346</td></tr></table>

Construction-in-process represents costs incurred related to towers that are under development and will be used in the Company’s site leasing operations. Depreciation expense was $269.2 million, $258.4 million, and $268.1 million for the years ended December 31, 2018, 2017, and 2016, respectively. At December 31, 2018 and 2017, non-cash capital expenditures that are included in accounts payable and accrued expenses were $12.4 million.



## 9. COSTS AND ESTIMATED EARNINGS ON UNCOMPLETED CONTRACTS

The Company’s costs and estimated earnings on uncompleted contracts are comprised of the following:

<table><tr><td rowspan="2"></td><td>As of</td><td>As of</td></tr><tr><td>December 31, 2018</td><td>December 31, 2017</td></tr><tr><td></td><td colspan="2">(in thousands)</td></tr><tr><td>Costs incurred on uncompleted contracts</td><td>$     38,464</td><td>$     31,404</td></tr><tr><td>Estimated earnings</td><td>16,655</td><td>10,541</td></tr><tr><td>Billings to date</td><td>(31,952)</td><td>(24,771)</td></tr><tr><td></td><td>$     23,167</td><td>$     17,174</td></tr></table>

These amounts are included in the accompanying Consolidated Balance Sheets under the following captions:

<table><tr><td rowspan="2"></td><td>As of</td><td>As of</td></tr><tr><td>December 31, 2018</td><td>December 31, 2017</td></tr><tr><td></td><td colspan="2">(in thousands)</td></tr><tr><td>Costs and estimated earnings in excess of billings on uncompleted contracts</td><td>$     23,785</td><td>$     17,437</td></tr><tr><td>Billings in excess of costs and estimated earnings on uncompleted contracts (included in Other current liabilities)</td><td>(618)</td><td>(263)</td></tr><tr><td></td><td>$     23,167</td><td>$     17,174</td></tr></table>

At December 31, 2018 and 2017, eight customers comprised 96.3% and 87.9%, respectively, of the costs and estimated earnings in excess of billings on uncompleted contracts, net of billings in excess of costs and estimated earnings, respectively.

## 10. CONCENTRATION OF CREDIT RISK

The Company’s credit risks consist primarily of accounts receivable with national, regional, and local wireless service providers and federal and state government agencies. The Company performs periodic credit evaluations of its customers’ financial condition and provides allowances for doubtful accounts, as required, based upon factors surrounding the credit risk of specific customers, historical trends, and other information. The Company generally does not require collateral.

The following is a list of significant customers (representing at least 10% of revenue for any period reported) and the percentage of total revenue for the specified time periods derived from such customers:

<table><tr><td rowspan="2">Percentage of Total Revenues</td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>AT&amp;T Wireless</td><td>24.0%</td><td>25.0%</td><td>25.7%</td></tr><tr><td>Sprint</td><td>17.9%</td><td>15.1%</td><td>16.1%</td></tr><tr><td>T-Mobile</td><td>16.4%</td><td>16.5%</td><td>17.0%</td></tr><tr><td>Verizon Wireless</td><td>14.7%</td><td>15.2%</td><td>15.2%</td></tr></table>



The Company’s site leasing and site development segments derive revenue from these customers. Client percentages of total revenue in each of the segments are as follows:

<table><tr><td rowspan="2">Percentage of Domestic Site Leasing Revenue</td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>AT&amp;T Wireless</td><td>31.9%</td><td>32.7%</td><td>32.7%</td></tr><tr><td>T-Mobile</td><td>20.3%</td><td>19.7%</td><td>19.6%</td></tr><tr><td>Sprint</td><td>19.6%</td><td>18.9%</td><td>19.8%</td></tr><tr><td>Verizon Wireless</td><td>19.0%</td><td>19.0%</td><td>18.2%</td></tr></table>

<table><tr><td rowspan="2">Percentage of International Site Leasing Revenue</td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>Oi S.A.</td><td>35.5%</td><td>42.2%</td><td>43.9%</td></tr><tr><td>Telefonica</td><td>26.7%</td><td>25.7%</td><td>26.4%</td></tr><tr><td>Claro</td><td>11.4%</td><td>10.0%</td><td>9.4%</td></tr></table>

<table><tr><td rowspan="2">Percentage of Site Development Revenue</td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>Sprint</td><td>47.1%</td><td>12.9%</td><td>11.7%</td></tr><tr><td>T-Mobile</td><td>16.4%</td><td>26.9%</td><td>28.4%</td></tr><tr><td>Verizon Wireless</td><td>6.4%</td><td>12.8%</td><td>16.5%</td></tr><tr><td>Nokia, Inc.</td><td>3.2%</td><td>10.1%</td><td>7.1%</td></tr></table>

Five customers comprised 67.5% of total gross accounts receivable at December 31, 2018 compared to five customers which comprised 66.9% of total gross accounts receivable at December 31, 2017.

## 11. EARNINGS PER SHARE

Basic earnings per share was computed by dividing net income attributable to common shareholders by the weighted-average number of shares of Common Stock outstanding for each respective period. Diluted earnings per share was calculated by dividing net income attributable to common shareholders by the weighted-average number of shares of Common Stock outstanding adjusted for any dilutive Common Stock equivalents, including unvested restricted stock and shares issuable upon exercise of stock options as determined under the “If-Converted” method and also Common Stock warrants as determined under the “Treasury Stock” method.



The following table sets forth basic and diluted net income per common share for the years ended December 31, 2018, 2017, and 2016 (in thousands, except per share data):

<table><tr><td rowspan="2"></td><td colspan="4">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td><td></td></tr><tr><td>Numerator:</td><td></td><td></td><td></td><td></td></tr><tr><td>Net income</td><td>$ 47,451</td><td>$ 103,654</td><td>$ 76,238</td><td></td></tr><tr><td>Denominator:</td><td></td><td></td><td></td><td></td></tr><tr><td>Basic weighted-average shares outstanding</td><td>114,909</td><td>119,860</td><td>124,448</td><td></td></tr><tr><td>Dilutive impact of stock options and restricted shares</td><td>1,606</td><td>1,162</td><td>696</td><td></td></tr><tr><td>Diluted weighted-average shares outstanding</td><td>116,515</td><td>121,022</td><td>125,144</td><td></td></tr><tr><td>Net income per common share:</td><td></td><td></td><td></td><td></td></tr><tr><td>Basic</td><td>$ 0.41</td><td>$ 0.86</td><td>$ 0.61</td><td></td></tr><tr><td>Diluted</td><td>$ 0.41</td><td>$ 0.86</td><td>$ 0.61</td><td></td></tr></table>

For the year ended December 31, 2018, the diluted weighted average number of common shares outstanding excluded an additional 0.8 million shares issuable upon exercise of the Company’s stock options because the impact would be anti-dilutive.

For the year ended December 31, 2017, the diluted weighted average number of common shares outstanding excluded an additional 1.0 million shares issuable upon exercise of the Company’s stock options because the impact would be anti-dilutive.

For the year ended December 31, 2016, the diluted weighted average number of common shares outstanding excluded an additional 2.2 million shares issuable upon exercise of the Company’s stock options because the impact would be anti-dilutive.



## 12. DEBT

The principal values, fair values, and carrying values of debt consist of the following (in thousands):

<table><tr><td rowspan="2"></td><td rowspan="2">Maturity Date</td><td colspan="3">As of</td><td colspan="3">As of</td></tr><tr><td colspan="3">December 31, 2018</td><td colspan="3">December 31, 2017</td></tr><tr><td></td><td></td><td>Principal Balance</td><td>Fair Value</td><td>Carrying Value</td><td>Principal Balance</td><td>Fair Value</td><td>Carrying Value</td></tr><tr><td>2014 Senior Notes</td><td>Jul. 15, 2022</td><td>$ 750,000</td><td>$ 735,000</td><td>$ 741,273</td><td>$ 750,000</td><td>$ 770,625</td><td>$ 739,079</td></tr><tr><td>2016 Senior Notes</td><td>Sep. 1, 2024</td><td>1,100,000</td><td>1,034,000</td><td>1,083,689</td><td>1,100,000</td><td>1,127,500</td><td>1,081,262</td></tr><tr><td>2017 Senior Notes</td><td>Oct. 1, 2022</td><td>750,000</td><td>712,500</td><td>743,099</td><td>750,000</td><td>750,938</td><td>741,437</td></tr><tr><td>2013-1C Tower Securities</td><td>Apr. 10, 2018</td><td>—</td><td>—</td><td>—</td><td>425,000</td><td>423,853</td><td>424,482</td></tr><tr><td>2013-2C Tower Securities</td><td>Apr. 11, 2023</td><td>575,000</td><td>569,164</td><td>569,715</td><td>575,000</td><td>578,433</td><td>568,609</td></tr><tr><td>2013-1D Tower Securities</td><td>Apr. 10, 2018</td><td>—</td><td>—</td><td>—</td><td>330,000</td><td>330,145</td><td>329,585</td></tr><tr><td>2014-1C Tower Securities</td><td>Oct. 8, 2019</td><td>920,000</td><td>914,241</td><td>917,728</td><td>920,000</td><td>915,216</td><td>914,929</td></tr><tr><td>2014-2C Tower Securities</td><td>Oct. 8, 2024</td><td>620,000</td><td>609,665</td><td>614,315</td><td>620,000</td><td>620,942</td><td>613,461</td></tr><tr><td>2015-1C Tower Securities</td><td>Oct. 8, 2020</td><td>500,000</td><td>496,640</td><td>495,737</td><td>500,000</td><td>496,840</td><td>493,474</td></tr><tr><td>2016-1C Tower Securities</td><td>Jul. 9, 2021</td><td>700,000</td><td>691,432</td><td>694,994</td><td>700,000</td><td>691,166</td><td>693,118</td></tr><tr><td>2017-1C Tower Securities</td><td>Apr. 11, 2022</td><td>760,000</td><td>744,496</td><td>753,028</td><td>760,000</td><td>751,404</td><td>751,076</td></tr><tr><td>2018-1C Tower Securities</td><td>Mar. 9, 2023</td><td>640,000</td><td>641,478</td><td>632,725</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Revolving Credit Facility</td><td>Apr. 11, 2023</td><td>325,000</td><td>325,000</td><td>325,000</td><td>40,000</td><td>40,000</td><td>40,000</td></tr><tr><td>2014 Term Loan</td><td>Mar. 24, 2021</td><td>—</td><td>—</td><td>—</td><td>1,447,500</td><td>1,451,119</td><td>1,439,373</td></tr><tr><td>2015 Term Loan</td><td>Jun. 10, 2022</td><td>—</td><td>—</td><td>—</td><td>487,500</td><td>488,109</td><td>480,801</td></tr><tr><td>2018 Term Loan</td><td>Apr. 11, 2025</td><td>2,388,000</td><td>2,262,630</td><td>2,367,250</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Total debt</td><td></td><td>$ 10,028,000</td><td>$ 9,736,246</td><td>$ 9,938,553</td><td>$ 9,405,000</td><td>$ 9,436,290</td><td>$ 9,310,686</td></tr><tr><td colspan="4">Less: current maturities of long-term debt</td><td colspan="4">(941,728)</td></tr><tr><td colspan="4">Total long-term debt, net of current maturities</td><td colspan="4">$ 8,996,825</td></tr></table>

The Company’s future principal payment obligations over the next five years (based on the outstanding debt as of December 31, 2018 and assuming the Tower Securities are repaid at their respective anticipated repayment dates) are as follows:

<table><tr><td>For the year ended December 31,</td><td>(in thousands)</td></tr><tr><td>2019</td><td>$ 944,000</td></tr><tr><td>2020</td><td>524,000</td></tr><tr><td>2021</td><td>724,000</td></tr><tr><td>2022</td><td>2,284,000</td></tr><tr><td>2023</td><td>1,564,000</td></tr></table>



The table below reflects cash and non-cash interest expense amounts recognized by debt instrument for the periods presented:

<table><tr><td rowspan="3"></td><td colspan="6">For the year ended December 31,</td></tr><tr><td colspan="2">2018</td><td colspan="2">2017</td><td colspan="2">2016</td></tr><tr><td>Cash Interest</td><td>Non-cash Interest</td><td>Cash Interest</td><td>Non-cash Interest</td><td>Cash Interest</td><td>Non-cash Interest</td></tr><tr><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td><td></td></tr><tr><td>5.625% Senior Notes</td><td>—</td><td>—</td><td>—</td><td>—</td><td>21,094</td><td>—</td></tr><tr><td>5.75% Senior Notes</td><td>—</td><td>—</td><td>—</td><td>—</td><td>28,494</td><td>—</td></tr><tr><td>2014 Senior Notes</td><td>36,563</td><td>761</td><td>36,563</td><td>724</td><td>36,563</td><td>689</td></tr><tr><td>2016 Senior Notes</td><td>53,625</td><td>1,003</td><td>53,625</td><td>954</td><td>20,258</td><td>348</td></tr><tr><td>2017 Senior Notes</td><td>30,000</td><td>—</td><td>6,500</td><td>—</td><td>—</td><td>—</td></tr><tr><td>2010-2C Tower Securities</td><td>—</td><td>—</td><td>—</td><td>—</td><td>15,213</td><td>—</td></tr><tr><td>2012 Tower Securities</td><td>—</td><td>—</td><td>5,330</td><td>—</td><td>18,107</td><td>—</td></tr><tr><td>2013 Tower Securities</td><td>25,654</td><td>—</td><td>43,217</td><td>—</td><td>43,217</td><td>—</td></tr><tr><td>2014 Tower Securities</td><td>51,138</td><td>—</td><td>51,138</td><td>—</td><td>51,138</td><td>—</td></tr><tr><td>2015-1C Tower Securities</td><td>15,939</td><td>—</td><td>15,939</td><td>—</td><td>15,939</td><td>—</td></tr><tr><td>2016-1C Tower Securities</td><td>20,361</td><td>—</td><td>20,361</td><td>—</td><td>9,898</td><td>—</td></tr><tr><td>2017-1C Tower Securities</td><td>24,354</td><td>—</td><td>17,182</td><td>—</td><td>—</td><td>—</td></tr><tr><td>2018-1C Tower Securities</td><td>18,072</td><td>—</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Revolving Credit Facility</td><td>7,411</td><td>—</td><td>8,046</td><td>—</td><td>4,167</td><td>—</td></tr><tr><td>2014 Term Loan</td><td>15,550</td><td>146</td><td>49,414</td><td>525</td><td>48,962</td><td>510</td></tr><tr><td>2015 Term Loan</td><td>5,237</td><td>187</td><td>16,641</td><td>676</td><td>16,487</td><td>656</td></tr><tr><td>2018 Term Loan</td><td>72,648</td><td>543</td><td>—</td><td>—</td><td>—</td><td>—</td></tr><tr><td>Capitalized interest and other</td><td>(335)</td><td>—</td><td>(207)</td><td>—</td><td>(366)</td><td>—</td></tr><tr><td>Total</td><td>$ 376,217</td><td>$ 2,640</td><td>$ 323,749</td><td>$ 2,879</td><td>$ 329,171</td><td>$ 2,203</td></tr></table>

## Senior Credit Agreement

On April 11, 2018, the Company amended and restated its Senior Credit Agreement to (1) issue a new $2.4 billion Term Loan, (2) increase the total commitments under the Revolving Credit Facility from $1.0 billion to $1.25 billion, (3) extend the maturity date of the Revolving Credit Facility to April 11, 2023, (4) lower the applicable interest rate margins and commitment fees under the Revolving Credit Facility, and (5) amend certain other terms and conditions under the Senior Credit Agreement. The proceeds from the new Term Loan were used to repay the outstanding balances on the 2014 Term Loan, 2015 Term Loan, and Revolving Credit Facility and for general corporate purposes. This transaction was accounted for as an extinguishment of the 2014 Term Loan and 2015 Term Loan.

## Terms of the Senior Credit Agreement

The Senior Credit Agreement, as amended, requires SBA Senior Finance II to maintain specific financial ratios, including (1) a ratio of Consolidated Net Debt to Annualized Borrower EBITDA not to exceed 6.5 times for any fiscal quarter, (2) a ratio of Consolidated Net Debt (calculated in accordance with the Senior Credit Agreement) to Annualized Borrower EBITDA for the most recently ended fiscal quarter not to exceed 6.5 times for 30 consecutive days and (3) a ratio of Annualized Borrower EBITDA to Annualized Cash Interest Expense (calculated in accordance with the Senior Credit Agreement) of not less than 2.0 times for any fiscal quarter. The Senior Credit Agreement contains customary affirmative and negative covenants that, among other things, limit the ability of SBA Senior Finance II and its subsidiaries to incur indebtedness, grant certain liens, make certain investments, enter into sale leaseback transactions, merge or consolidate, make certain restricted payments, enter into transactions with affiliates, and engage in certain asset dispositions, including a sale of all or substantially all of their property. The Senior Credit Agreement is also subject to



customary events of default. Pursuant to the Second Amended and Restated Guarantee and Collateral Agreement, amounts borrowed under the Revolving Credit Facility, the Term Loans and certain hedging transactions that may be entered into by SBA Senior Finance II or the Subsidiary Guarantors (as defined in the Senior Credit Agreement) with lenders or their affiliates are secured by a first lien on the membership interests of SBA Telecommunications, LLC, SBA Senior Finance, LLC and SBA Senior Finance II and on substantially all of the assets (other than leasehold, easement and fee interests in real property) of SBA Senior Finance II and the Subsidiary Guarantors.

The Senior Credit Agreement, as amended, permits SBA Senior Finance II, without the consent of the other lenders, to request that one or more lenders provide SBA Senior Finance II with increases in the Revolving Credit Facility or additional term loans provided that after giving effect to the proposed increase in Revolving Credit Facility commitments or incremental term loans the ratio of Consolidated Net Debt to Annualized Borrower EBITDA would not exceed 6.5 times. SBA Senior Finance II’s ability to request such increases in the Revolving Credit Facility or additional term loans is subject to its compliance with customary conditions set forth in the Senior Credit Agreement including compliance, on a pro forma basis, with the financial covenants and ratios set forth therein and, with respect to any additional term loan, an increase in the margin on existing term loans to the extent required by the terms of the Senior Credit Agreement. Upon SBA Senior Finance II’s request, each lender may decide, in its sole discretion, whether to increase all or a portion of its Revolving Credit Facility commitment or whether to provide SBA Senior Finance II with additional term loans and, if so, upon what terms.

## Revolving Credit Facility under the Senior Credit Agreement

As amended, the Revolving Credit Facility consists of a revolving loan under which up to $1.25 billion aggregate principal amount may be borrowed, repaid and redrawn, based upon specific financial ratios and subject to the satisfaction of other customary conditions to borrowing. Amounts borrowed under the Revolving Credit Facility accrue interest, at SBA Senior Finance II's election, at either (1) the Eurodollar Rate plus a margin that ranges from 112.5 basis points to 175.0 basis points or (2) the Base Rate plus a margin that ranges from 12.5 basis points to 75.0 basis points, in each case based on the ratio of Consolidated Net Debt to Annualized Borrower EBITDA, calculated in accordance with the Senior Credit Agreement. In addition, SBA Senior Finance II is required to pay a commitment fee of between 0.20% and 0.25% per annum on the amount of unused commitment. If not earlier terminated by SBA Senior Finance II, the Revolving Credit Facility will terminate on, and SBA Senior Finance II will repay all amounts outstanding on or before, April 11, 2023. The proceeds available under the Revolving Credit Facility may be used for general corporate purposes. SBA Senior Finance II may, from time to time, borrow from and repay the Revolving Credit Facility. Consequently, the amount outstanding under the Revolving Credit Facility at the end of the period may not be reflective of the total amounts outstanding during such period.

During the year ended December 31, 2018, the Company borrowed $1.1 billion and repaid $835.0 million of the outstanding balance under the Revolving Credit Facility. As of December 31, 2018, the balance outstanding under the Revolving Credit Facility was $325.0 million accruing interest at 4.38% per annum. In addition, SBA Senior Finance II was required to pay a commitment fee of 0.25% per annum on the amount of the unused commitment. As of December 31, 2018, SBA Senior Finance II was in compliance with the financial covenants contained in the Senior Credit Agreement.

Subsequent to December 31, 2018, the Company repaid $120.0 million of the outstanding balance under the Revolving Credit Facility. As of the date of this filing, $205.0 million was outstanding under the Revolving Credit Facility.

## Term Loans under the Senior Credit Agreement

## 2014 Term Loan

The 2014 Term Loan consisted of a senior secured term loan with an initial aggregate principal amount of $1.5 billion that was scheduled to mature on March 24, 2021. The 2014 Term Loan accrued interest, at SBA Senior Finance II's election, at either the Base Rate plus 125 basis points (with zero Base Rate floor) or the Eurodollar Rate plus 225 basis points (with a zero Eurodollar Rate floor). The 2014 Term Loan was originally issued at 99.75% of par value. Principal payments on the 2014 Term Loan commenced on September 30, 2014 and were being made in quarterly installments on the last day of each March, June, September, and December in an amount equal to $3.8 million. The Company incurred deferred financing fees of approximately $14.1 million in relation to this transaction which were being amortized through the maturity date.

During the three months ended March 31, 2018, the Company repaid $3.8 million of principal on the 2014 Term Loan. On April 11, 2018, the Company repaid the remaining $1,443.8 million outstanding principal balance of the 2014 Term Loan with proceeds from the 2018 Term Loan. In connection with the repayment, the Company expensed $5.8 million of net deferred financing fees and $1.7 million of discount related to the debt.



The 2015 Term Loan consisted of a senior secured term loan with an initial aggregate principal amount of $500.0 million that was scheduled to mature on June 10, 2022. The 2015 Term Loan accrued interest, at SBA Senior Finance II's election at either the Base Rate plus 125 basis points (with a zero Base Rate floor) or the Eurodollar Rate plus 225 basis points (with a zero Eurodollar Rate floor). The 2015 Term Loan was originally issued at 99.0% of par value. Principal payments on the 2015 Term Loan commenced on September 30, 2015 and were being made in quarterly installments on the last day of each March, June, September, and December in an amount equal to $1.3 million. The Company incurred financing fees of approximately $5.5 million in relation to this transaction, which were being amortized through the maturity date.

During the three months ended March 31, 2018, the Company repaid $1.3 million of principal on the 2015 Term Loan. On April 11, 2018, the Company repaid the remaining $486.3 million outstanding principal balance of the 2015 Term Loan with proceeds from the 2018 Term Loan. In connection with the repayment, the Company expensed $3.2 million of net deferred financing fees and $3.1 million of discount related to the debt.

## 2018 Term Loan

On April 11, 2018, the Company, through its wholly owned subsidiary, SBA Senior Finance II LLC, obtained a new term loan (the "2018 Term Loan") under the amended and restated Senior Credit Agreement. The 2018 Term Loan consists of a senior secured term loan with an initial aggregate principal amount of $2.4 billion that matures on April 11, 2025. The 2018 Term Loan accrues interest, at SBA Senior Finance II's election at either the Base Rate plus 100 basis points (with a zero Base Rate floor) or the Eurodollar Rate plus 200 basis points (with a zero Eurodollar Rate floor). The 2018 Term Loan was issued at 99.75% of par value. As of December 31, 2018, the 2018 Term Loan was accruing interest at 4.53% per annum. Principal payments on the 2018 Term Loan commenced on September 30, 2018 and are being made in quarterly installments on the last day of each March, June, September, and December in an amount equal to $6.0 million. The Company incurred financing fees of approximately $16.8 million in relation to this transaction, which are being amortized through the maturity date. The proceeds from the 2018 Term Loan were used (1) to retire the outstanding $1.93 billion in aggregate principal amount of the 2014 Term Loan and 2015 Term Loan, (2) to pay down the existing outstanding balance under the Revolving Credit Facility, and (3) for general corporate purposes.

During the year ended December 31, 2018, the Company repaid an aggregate of $12.0 million of principal on the 2018 Term Loan. As of December 31, 2018, the 2018 Term Loan had a principal balance of $2.4 billion.

On February 1, 2019, the Company, through its wholly owned subsidiary, SBA Senior Finance II, LLC, entered into a four-year interest rate swap on a portion of its 2018 Term Loan. The Company swapped $1.2 billion of notional value accruing interest at one month LIBOR plus 200 basis points for a fixed rate of 4.495% per annum.

## Secured Tower Revenue Securities

## Tower Revenue Securities Terms

The mortgage loan underlying the 2013-2C Tower Securities, 2014 Tower Securities, 2015-1C Tower Securities, 2016-1C Tower Securities, 2017-1C Tower Securities, and 2018-1C Tower Securities (together the “Tower Securities”) will be paid from the operating cash flows from the aggregate 10,426 tower sites owned by the Borrowers. The sole asset of the Trust consists of a non-recourse mortgage loan made in favor of those entities that are borrowers on the mortgage loan (the “Borrowers”). The mortgage loan is secured by (1) mortgages, deeds of trust, and deeds to secure debt on a substantial portion of the tower sites, (2) a security interest in the tower sites and substantially all of the Borrowers’ personal property and fixtures, (3) the Borrowers’ rights under certain tenant leases, and (4) all of the proceeds of the foregoing. For each calendar month, SBA Network Management, Inc., an indirect subsidiary (“Network Management”), is entitled to receive a management fee equal to 4.5% of the Borrowers’ operating revenues for the immediately preceding calendar month.

The Borrowers may prepay any of the mortgage loan components, in whole or in part, with no prepayment consideration, (1) within twelve months (in the case of the component corresponding to the Secured Tower Revenue Securities Series 2014-1C, Secured Tower Revenue Securities Series 2015-1C, Secured Tower Revenue Securities Series 2016-1C, Secured Tower Revenue Securities Series 2017-1C, and Secured Tower Revenue Securities Series 2018-1C) or eighteen months (in the case of the components corresponding to the Secured Tower Revenue Securities Series 2013-2C and Secured Tower Revenue Securities Series 2014-2C) of the anticipated repayment date of such mortgage loan component, (2) with proceeds received as a result of any condemnation or casualty of any tower owned by the Borrowers or (3) during an amortization period. In all other circumstances, the Borrowers may prepay the mortgage loan, in whole or in part, upon payment of the applicable prepayment consideration. The prepayment



consideration is determined based on the class of the Tower Securities to which the prepaid mortgage loan component corresponds and consists of an amount equal to the excess, if any, of (1) the present value associated with the portion of the principal balance being prepaid, calculated in accordance with the formula set forth in the mortgage loan agreement, on the date of prepayment of all future installments of principal and interest required to be paid from the date of prepayment to and including the first due date within twelve months (in the case of the component corresponding to the Secured Tower Revenue Securities Series 2014-1C, Secured Tower Revenue Securities Series 2015-1C, Secured Tower Revenue Securities Series 2016-1C, Secured Tower Revenue Securities Series 2017-1C, and Secured Tower Revenue Securities Series 2018-1C) or eighteen months (in the case of the components corresponding to the Secured Tower Revenue Securities Series 2013-2C and Secured Tower Revenue Securities Series 2014-2C) of the anticipated repayment date of such mortgage loan component over (2) that portion of the principal balance of such class prepaid on the date of such prepayment.

To the extent that the mortgage loan components corresponding to the Tower Securities are not fully repaid by their respective anticipated repayment dates, the interest rate of each such component will increase by the greater of (1) 5% and (2) the amount, if any, by which the sum of (x) the ten-year U.S. treasury rate plus (y) the credit-based spread for such component (as set forth in the mortgage loan agreement) plus (z) 5%, exceeds the original interest rate for such component.

Pursuant to the terms of the Tower Securities, all rents and other sums due on any of the towers owned by the Borrowers are directly deposited by the lessees into a controlled deposit account and are held by the indenture trustee. The monies held by the indenture trustee after the release date are classified as short-term restricted cash on the Consolidated Balance Sheets (see Note 4). However, if the Debt Service Coverage Ratio, defined as the net cash flow (as defined in the mortgage loan agreement) divided by the amount of interest on the mortgage loan, servicing fees and trustee fees that the Borrowers are required to pay over the succeeding twelve months, as of the end of any calendar quarter, falls to 1.30x or lower, then all cash flow in excess of amounts required to make debt service payments, to fund required reserves, to pay management fees and budgeted operating expenses and to make other payments required under the loan documents, referred to as “excess cash flow,” will be deposited into a reserve account instead of being released to the Borrowers. The funds in the reserve account will not be released to the Borrowers unless the Debt Service Coverage Ratio exceeds 1.30x for two consecutive calendar quarters. If the Debt Service Coverage Ratio falls below 1.15x as of the end of any calendar quarter, then an “amortization period” will commence and all funds on deposit in the reserve account will be applied to prepay the mortgage loan until such time that the Debt Service Coverage Ratio exceeds 1.15x for a calendar quarter. In addition, if any of the Tower Securities are not fully repaid by their respective anticipated repayment dates, the cash flow from the towers owned by the Borrowers will be trapped by the trustee for the Tower Securities and applied first to repay the interest, at the original interest rates, on the mortgage loan components underlying the Tower Securities, second to fund all reserve accounts and operating expenses associated with those towers, third to pay the management fees due to Network Management, fourth to repay principal of the Tower Securities and fifth to repay the additional interest discussed above. Furthermore, the advance rents reserve requirement states that the Borrowers are required to maintain an advance rents reserve at any time the monthly tenant Debt Service Coverage Ratio is equal to or less than 2:1 and for two calendar months after such coverage ratio again exceeds 2:1. The mortgage loan agreement, as amended, also includes covenants customary for mortgage loans subject to rated securitizations. Among other things, the Borrowers are prohibited from incurring other indebtedness for borrowed money or further encumbering their assets.

## 2010-2C Tower Securities

On April 16, 2010, the Company, through a New York common law trust (the "Trust"), issued $550.0 million of 2010-2C Tower Securities (the "2010-2C Tower Securities"). The 2010-2C Tower Securities had an annual interest rate of 5.101%. The anticipated repayment date and the final maturity date for the 2010-2C Tower Securities were April 11, 2017 and April 9, 2024, respectively. The Company incurred deferred financing fees of $8.1 million in relation to this transaction which were being amortized through the anticipated repayment date of the 2010-2C Tower Securities.

On July 15, 2016, the Company repaid in full the 2010-2C Tower Securities with proceeds from the 2016-1C Tower Securities. Additionally, the Company expensed $1.0 million of deferred financing fees related to the redemption of the 2010-2C Tower Securities, which are reflected in loss from extinguishment of debt on the Consolidated Statement of Operations.

## 2012-1C Tower Securities

On August 9, 2012, the Company, through the Trust, issued $610.0 million of Secured Tower Revenue Securities Series 2012-1C (the "2012-1C Tower Securities"), which had an anticipated repayment date of December 11, 2017 and a final maturity date of December 9, 2042. The fixed interest rate of the 2012-1C Tower Securities was 2.933% per annum, payable monthly. The Company incurred deferred financing fees of $14.9 million in relation to this transaction, which were being amortized through the anticipated repayment date of the 2012-1C Tower Securities.



On April 17, 2017, the Company repaid in full the 2012-1C Tower Securities with proceeds from the 2017-1C Tower Securities. In connection with the repayment, the Company expensed $2.0 million of net deferred financing fees.

## 2013 Tower Securities

On April 18, 2013, the Company, through the Trust, issued $425.0 million of 2.240% Secured Tower Revenue Securities Series 2013-1C, which had an anticipated repayment date of April 10, 2018 and a final maturity date of April 9, 2043 (the "2013-1C Tower Securities"), $575.0 million of 3.722% Secured Tower Revenue Securities Series 2013-2C, which have an anticipated repayment date of April 11, 2023 and a final maturity date of April 9, 2048 (the "2013-2C Tower Securities"), and $330.0 million of 3.598% Secured Tower Revenue Securities Series 2013-1D, which had an anticipated repayment date of April 10, 2018 and a final maturity date of April 9, 2043 (the "2013-1D Tower Securities") (collectively the "2013 Tower Securities"). The aggregate $1.33 billion of 2013 Tower Securities had a blended interest rate of 3.218% per annum, payable monthly. The Company incurred financing fees of $25.5 million in relation to this transaction, which were being amortized through the anticipated repayment date of each of the 2013 Tower Securities.

On March 9, 2018, the Company repaid the entire aggregate principal amount of the 2013-1C Tower Securities and 2013-1D Tower Securities in connection with the issuance of the 2018-1C Tower Securities (as defined below).

The sole asset of the Trust consists of a non-recourse mortgage loan made in favor of those entities that are borrowers on the mortgage loan (the “Borrowers”).

## 2014 Tower Securities

On October 15, 2014, the Company, through the Trust, issued $920.0 million of 2.898% Secured Tower Revenue Securities Series 2014-1C, which have an anticipated repayment date of October 8, 2019 and a final maturity date of October 11, 2044 (the "2014-1C Tower Securities") and $620.0 million of 3.869% Secured Tower Revenue Securities Series 2014-2C, which have an anticipated repayment date of October 8, 2024 and a final maturity date of October 8, 2049 (the "2014-2C Tower Securities") (collectively the "2014 Tower Securities"). The aggregate $1.54 billion of 2014 Tower Securities have a blended interest rate of 3.289% per annum, payable monthly. The Company incurred financing fees of $22.5 million in relation to this transaction, which are being amortized through the anticipated repayment date of each of the 2014 Tower Securities.

## 2015-1C Tower Securities

On October 14, 2015, the Company, through the Trust, issued $500.0 million of Secured Tower Revenue Securities Series 2015-1C, which have an anticipated repayment date of October 8, 2020 and a final maturity date of October 10, 2045 (the "2015-1C Tower Securities"). The fixed interest rate of the 2015-1C Tower Securities is 3.156% per annum, payable monthly. The Company incurred financing fees of $11.2 million in relation to this transaction, which are being amortized through the anticipated repayment date of the 2015-1C Tower Securities.

## 2016-1C Tower Securities

On July 7, 2016, the Company, through the Trust, issued $700.0 million of Secured Tower Revenue Securities Series 2016-1C, which have an anticipated repayment date of July 9, 2021 and a final maturity date of July 10, 2046 (the "2016-1C Tower Securities"). The fixed interest rate of the 2016-1C Tower Securities is 2.877% per annum, payable monthly. The Company incurred financing fees of $9.5 million in relation to this transaction, which are being amortized through the anticipated repayment date of the 2016-1C Tower Securities.

## 2017-1C Tower Securities

On April 17, 2017, the Company, through the Trust, issued $760.0 million of Secured Tower Revenue Securities Series 2017-1C, which have an anticipated repayment date of April 11, 2022 and a final maturity date of April 9, 2047 (the "2017-1C Tower Securities"). The fixed interest rate on the 2017-1C Tower Securities is 3.168% per annum, payable monthly. Net proceeds from this offering were used to prepay the entire $610.0 million aggregate principal amount, as well as accrued and unpaid interest, of the 2012-1C Tower Securities and for general corporate purposes. The Company incurred financing fees of $10.2 million in relation to this transaction, which are being amortized through the anticipated repayment date of the 2017-1C Tower Securities.



In addition, to satisfy certain risk retention requirements of Regulation RR promulgated under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), SBA Guarantor, LLC, a wholly owned subsidiary, purchased $40.0 million of Secured Tower Revenue Securities Series 2017-1R issued by the Trust, which have an anticipated repayment date of April 11, 2022 and a final maturity date of April 9, 2047 (the "2017-1R Tower Securities"). The fixed interest rate on the 2017-1R Tower Securities is 4.459% per annum, payable monthly. Principal and interest payments made on the 2017-1R Tower Securities eliminate in consolidation.

## 2018-1C Tower Securities

On March 9, 2018, the Company, through the Trust, issued $640.0 million of Secured Tower Revenue Securities Series 2018-1C, which have an anticipated repayment date of March 9, 2023 and a final maturity date of March 9, 2048 (the "2018-1C Tower Securities"). The fixed interest rate on the 2018-1C Tower Securities is 3.448% per annum, payable monthly. Net proceeds from this offering, in combination with borrowings under the Revolving Credit Facility, were used to repay the entire aggregate principal amount of the 2013-1C Tower Securities ($425.0 million) and 2013-1D Tower Securities ($330.0 million), as well as accrued and unpaid interest. The Company incurred financing fees of $8.5 million in relation to this transaction, which are being amortized through the anticipated repayment date of the 2018-1C Tower Securities.

In addition, to satisfy certain risk retention requirements of Regulation RR promulgated under the Exchange Act, SBA Guarantor, LLC, a wholly owned subsidiary, purchased $33.7 million of Secured Tower Revenue Securities Series 2018-1R issued by the Trust. These securities have an anticipated repayment date of March 9, 2023 and a final maturity date of March 9, 2048 (the "2018-1R Tower Securities"). The fixed interest rate on the 2018-1R Tower Securities is 4.949% per annum, payable monthly. Principal and interest payments made on the 2018-1R Tower Securities eliminate in consolidation.

In connection with the issuance of the 2018-1C Tower Securities, the non-recourse mortgage loan was increased by $673.7 million (but decreased by a net of $81.3 million after giving effect to prepayment of the loan components relating to the 2013-1C Tower Securities and 2013-1D Tower Securities). The new loan, after eliminating the risk retention securities, accrues interest at the same rate as the 2018-1C Tower Securities and is subject to all other material terms of the existing mortgage loan, including collateral and interest rate after the anticipated repayment date.

In connection with the issuance of the 2018-1C Tower Securities, SBA Properties, LLC, SBA Sites, LLC, SBA Structures, LLC, SBA Infrastructure, LLC, SBA Monarch Towers III, LLC, SBA 2012 TC Assets PR, LLC, SBA 2012 TC Assets, LLC, SBA Towers IV, LLC, SBA Monarch Towers I, LLC, SBA Towers USVI, Inc., SBA Towers VII, LLC, SBA GC Towers, LLC, SBA Towers V, LLC, and SBA Towers VI, LLC (collectively, the "Borrowers"), each an indirect subsidiary of SBAC, and Midland Loan Services, a division of PNC Bank, National Association, as servicer, on behalf of the Trustee entered into the Second Loan and Security Agreement Supplement and Amendment pursuant to which, among other things, (1) the outstanding principal amount of the mortgage loan was increased by $640.0 million and (2) the Borrowers became jointly and severally liable for the aggregate $4.7 billion borrowed under the mortgage loan corresponding to the 2013-2C Tower Securities, 2014 Tower Securities, 2015-1C Tower Securities, 2016-1C Tower Securities, 2017-1C Tower Securities, and the newly issued 2018-1C Tower Securities.

## Debt Covenants

As of December 31, 2018, the Borrowers met the debt service coverage ratio required by the mortgage loan agreement and were in compliance with all other covenants as set forth in the agreement.

## Senior Notes

## 5.75% Senior Notes

On July 13, 2012, Telecommunications issued $800.0 million of unsecured senior notes due July 15, 2020 (the “5.75% Senior Notes”). The 5.75% Senior Notes accrued interest at a rate of 5.75% and were issued at par. The Company incurred financing fees of $14.0 million in relation to this transaction, which were being amortized through the maturity date.

On August 15, 2016, the Company used proceeds from the 2016 Senior Notes to redeem the full $800.0 million in aggregate principal amount of the 5.75% Senior Notes and to pay $25.8 million for the call premium and accrued interest on the redemption of the notes. Additionally, the Company expensed $7.7 million of deferred financing fees related to the redemption of the notes. The call premium and the write-off of deferred financing fees are reflected in loss from extinguishment of debt on the Consolidated Statement of Operations.



SBAC is a holding company with no business operations of its own and its only significant asset is the outstanding capital stock of Telecommunications. Telecommunications is 100% owned by SBAC. SBAC had fully and unconditionally guaranteed the Senior Notes issued by Telecommunications.

## 5.625% Senior Notes

On September 28, 2012, the Company issued $500.0 million of unsecured senior notes due October 1, 2019 (the “5.625% Senior Notes”). The 5.625% Senior Notes accrued interest at a rate of 5.625% per annum and were issued at par. Interest on the 5.625% Senior Notes was due semi-annually on April 1 and October 1 of each year. The Company incurred financing fees of $8.6 million in relation to this transaction, which were being amortized through the maturity date.

On October 1, 2016, the Company redeemed the 5.625% Senior Notes in full. On October 3, 2016, the Company repaid $500.0 million in outstanding principal, $14.1 million related to the call premium on the early redemption of the notes, and $14.1 million in accrued interest. Repayment was made using (1) the proceeds from the 2016 Senior Notes, (2) borrowings under the Revolving Credit Facility, and (3) cash on hand. In addition, the Company expensed $4.1 million of deferred financing fees related to the redemption of the notes. The call premium and the write-off of deferred financing fees are reflected in loss from extinguishment of debt on the Consolidated Statement of Operations.

## 2014 Senior Notes

On July 1, 2014, the Company issued $750.0 million of unsecured senior notes due July 15, 2022 (the “2014 Senior Notes”). The 2014 Senior Notes accrue interest at a rate of 4.875% per annum and were issued at 99.178% of par value. Interest on the 2014 Senior Notes is due semi-annually on January 15 and July 15 of each year. The Company incurred financing fees of $11.6 million in relation to this transaction, which are being amortized through the maturity date.

The 2014 Senior Notes are subject to redemption in whole or in part at the redemption prices set forth in the indenture agreement plus accrued and unpaid interest. The Company may redeem the 2014 Senior Notes during the twelve-month period beginning on the following dates at the following redemption prices: July 15, 2019 at 101.219% or July 15, 2020 until maturity at 100.000% of the principal amount of the 2014 Senior Notes to be redeemed on the redemption date plus accrued and unpaid interest.

## 2016 Senior Notes

On August 15, 2016, the Company issued $1.1 billion of unsecured senior notes due September 1, 2024 (the “2016 Senior Notes”). The 2016 Senior Notes accrue interest at a rate of 4.875% per annum and were issued at 99.178% of par value. Interest on the 2016 Senior Notes is due semi-annually on March 1 and September 1 of each year, beginning on March 1, 2017. The Company incurred financing fees of $12.8 million in relation to this transaction, which are being amortized through the maturity date. Net proceeds from this offering and cash on hand were used to redeem $800.0 million, the aggregate principal amount outstanding, of Telecommunications’ 5.75% Senior Notes and $250.0 million of the Company’s 5.625% Senior Notes and pay the associated call premiums.

The 2016 Senior Notes are subject to redemption in whole or in part on or after September 1, 2019 at the redemption prices set forth in the indenture agreement plus accrued and unpaid interest. Prior to September 1, 2019, the Company may at its option redeem up to 35% of the aggregate principal amount of the 2016 Senior Notes originally issued at a redemption price of 104.875% of the principal amount of the 2016 Senior Notes to be redeemed on the redemption date plus accrued and unpaid interest with the net proceeds of certain equity offerings. The Company may redeem the 2016 Senior Notes during the twelve-month period beginning on the following dates at the following redemption prices: September 1, 2019 at 103.656%, September 1, 2020 at 102.438%, September 1, 2021 at 101.219%, or September 1, 2022 until maturity at 100.000%, of the principal amount of the 2016 Senior Notes to be redeemed on the redemption date plus accrued and unpaid interest.

## 2017 Senior Notes

On October 13, 2017, the Company issued $750.0 million of unsecured senior notes due October 1, 2022 (the “2017 Senior Notes”). The 2017 Senior Notes accrue interest at a rate of 4.0% per annum. Interest on the 2017 Senior Notes is due semi-annually on April 1 and October 1 of each year, beginning on April 1, 2018. The Company incurred financing fees of $8.9 million in relation to



this transaction, which are being amortized through the maturity date. Net proceeds from this offering were used to repay $460.0 million outstanding under the Revolving Credit Facility and for general corporate purposes.

The 2017 Senior Notes are subject to redemption in whole or in part on or after October 1, 2019 at the redemption prices set forth in the indenture agreement plus accrued and unpaid interest. Prior to October 1, 2020, the Company may, at its option, redeem up to 35% of the aggregate principal amount of the 2017 Senior Notes originally issued at a redemption price of 104.000% of the principal amount of the 2017 Senior Notes to be redeemed on the redemption date plus accrued and unpaid interest with the net proceeds of certain equity offerings. The Company may redeem the 2017 Senior Notes during the twelve-month period beginning on the following dates at the following redemption prices: October 1, 2019 at 102.000%, October 1, 2020 at 101.000%, or October 1, 2021 until maturity at 100.000%, of the principal amount of the 2017 Senior Notes to be redeemed on the redemption date plus accrued and unpaid interest.

## Indentures Governing Senior Notes

The Indentures governing the Senior Notes contain customary covenants, subject to a number of exceptions and qualifications, including restrictions on the ability of SBAC and Telecommunications to (1) incur additional indebtedness unless the Consolidated Indebtedness to Annualized Consolidated Adjusted EBITDA Ratio (as defined in the Indenture), pro forma for the additional indebtedness does not exceed, with respect to any fiscal quarter, 9.5x for SBAC, (2) merge, consolidate or sell assets, (3) make restricted payments, including dividends or other distributions, (4) enter into transactions with affiliates, and (5) enter into sale and leaseback transactions and restrictions on the ability of the Restricted Subsidiaries of SBAC (as defined in the Indentures) to incur liens securing indebtedness.

## 13. SHAREHOLDERS' EQUITY

## Common Stock Equivalents

The Company has potential common stock equivalents (see Note 14) related to its outstanding stock options and restricted stock units. These potential common stock equivalents were considered in the Company’s diluted earnings per share calculation (see Note 11).

## Stock Repurchases

On June 4, 2015, the Company’s Board of Directors authorized a $1.0 billion stock repurchase plan, replacing the plan authorized on April 27, 2011. This plan authorized the Company to purchase, from time to time, up to $1.0 billion of the outstanding Class A common stock through open market repurchases in compliance with Rule 10b-18 under the Exchange Act, and/or in privately negotiated transactions at management’s discretion based on market and business conditions, applicable legal requirements, and other factors. During the year ended December 31, 2016, the Company repurchased 5.3 million shares of its Class A common stock under this stock repurchase program for $545.7 million at a weighted average price per share of $102.14. During the year ended December 31, 2017, the Company repurchased 42,163 shares of its Class A common stock under this stock repurchase plan for $4.4 million at a weighted average price per share of $104.81. Shares repurchased were retired.

On January 12, 2017, the Company’s Board of Directors authorized a $1.0 billion stock repurchase plan, replacing the plan authorized on June 4, 2015. This plan authorized the Company to purchase, from time to time, up to $1.0 billion of the Company’s outstanding Class A common stock through open market repurchases in compliance with Rule 10b-18 under the Exchange Act, and/or in privately negotiated transactions at management’s discretion based on market and business conditions, applicable legal requirements, and other factors. During the year ended December 31, 2017, the Company repurchased 5.8 million shares of its Class A common stock under this plan for $850.0 million, at an average price per share of $146.17. Shares repurchased were retired.

On February 16, 2018, the Company’s Board of Directors authorized a $1.0 billion stock repurchase plan, replacing the plan authorized on January 12, 2017. This plan authorizes the Company to purchase, from time to time, up to $1.0 billion of the outstanding Class A common stock through open market repurchases in compliance with Rule 10b-18 under the Exchange Act, and/or in privately negotiated transactions at management’s discretion based on market and business conditions, applicable legal requirements, and other factors. This plan has no time deadline and will continue until otherwise modified or terminated by the Company’s Board of Directors at any time in its sole discretion. During the year ended December 31, 2018, the Company repurchased 5.0 million shares of its Class A common stock under this plan for $795.5 million, at an average price per share of $159.87. Shares repurchased were retired. As of the date of this filing, the Company had $204.5 million authorization remaining under this plan.



## Registration of Additional Shares

On May 20, 2010, the Company filed a registration statement on Form S-8 with the Securities and Exchange Commission registering 15.0 million shares of the Company’s Class A common stock issuable under the 2010 Performance and Equity Incentive Plan (see Note 14).

The Company filed a shelf registration statement on Form S-4 with the Securities and Exchange Commission registering 4.0 million shares of its Class A common stock in 2007. These shares may be issued in connection with acquisitions of wireless communication towers or antenna sites and related assets or companies that own wireless communication towers, antenna sites, or related assets. During the year ended December 31, 2018 and 2016, the Company did not issue any shares of its Class A common stock pursuant to this registration statement in connection with acquisitions. During the year ended December 31, 2017, the Company issued 487,963 shares of Class A common stock under this registration statement. As of December 31, 2018, the Company had approximately 1.2 million shares of Class A common stock remaining under this registration statement.

On March 5, 2018, the Company filed with the Commission an automatic shelf registration statement for well-known seasoned issuers on Form S-3ASR. This registration statement enables the Company to issue shares of its Class A common stock, preferred stock or debt securities either separately or represented by warrants, or depositary shares as well as units that include any of these securities. Under the rules governing automatic shelf registration statements, the Company will file a prospectus supplement and advise the Commission of the amount and type of securities each time it issues securities under this registration statement. For the year ended December 31, 2018, the Company did not issue any securities under this automatic shelf registration statement.

## 14. STOCK-BASED COMPENSATION

The Company has an equity participation plan (the 2010 Performance and Equity Incentive Plan, the “2010 Plan”) whereby options (both non-qualified and incentive stock options), restricted stock units, stock appreciation rights, and other equity and performance based instruments may be granted to directors, employees, and consultants. The options and restricted stock units generally vest from the date of grant on a straight-line basis over the vesting term and generally have a seven-year or a ten-year contractual life.

The 2010 Plan was adopted by the Company’s shareholders on May 6, 2010 and provides for the issuance of a maximum of 15.0 million shares of the Company’s Class A common stock, of which 6.5 million shares remain available for future issuance as of December 31, 2018. However, the aggregate number of shares that may be issued pursuant to restricted stock awards, restricted stock unit awards, stock bonus awards, performance awards, other stock-based awards, or other awards granted under the 2010 Plan will not exceed 7.5 million shares, of which 6.5 million shares remain available for future issuance as of December 31, 2018.

During 2018, the Board of Directors adopted a retirement policy applicable to all employees receiving equity as part of their compensation plan. This policy is effective January 1, 2019. Historically, all unvested equity awards granted would be forfeited the day after an employee stops working for the Company and any options that were vested but unexercised would be forfeited 90 days after the employee stopped working. The new retirement policy allows employees that meet certain conditions to retire and keep unvested equity awards and extends the time the employee has to exercise vested and outstanding awards. As a result of this policy, stock compensation expense related to the adoption of the policy will result in an acceleration of unrecognized stock compensation expense of approximately $11.2 million and $7.3 million in the first and second quarter of 2019, respectively.



## Stock Options

The Company records compensation expense for employee stock options based on the estimated fair value of the options on the date of grant using the Black-Scholes option-pricing model with the assumptions included in the table below. The Company uses a combination of historical data and historical volatility to establish the expected volatility, as well as to estimate the expected option life. The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant for the estimated life of the option. The following assumptions were used to estimate the fair value of options granted using the Black-Scholes option-pricing model:

<table><tr><td rowspan="2"></td><td colspan="3">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td></tr><tr><td>Risk free interest rate</td><td>2.57% - 2.92%</td><td>1.70% - 1.97%</td><td>1.11% - 1.43%</td></tr><tr><td>Dividend yield</td><td>0.7%</td><td>0.0%</td><td>0.0%</td></tr><tr><td>Expected volatility</td><td>21.6%</td><td>20.0%</td><td>20.0%</td></tr><tr><td>Expected lives</td><td>4.6 years</td><td>4.6 years</td><td>4.7 years</td></tr></table>

The following table summarizes the Company’s activities with respect to its stock option plans for the years ended December 31, 2018, 2017 and 2016 as follows (dollars and shares in thousands, except for per share data):

<table><tr><td rowspan="2"></td><td>Number</td><td>Weighted-Average</td><td>Weighted-Average Remaining</td><td>Aggregate</td></tr><tr><td>of Shares</td><td>Exercise Price</td><td>Contractual Life (in years)</td><td>Intrinsic Value</td></tr><tr><td>Outstanding at December 31, 2015</td><td>3,794</td><td>$ 84.66</td><td></td><td></td></tr><tr><td>Granted</td><td>1,357</td><td>$ 96.64</td><td></td><td></td></tr><tr><td>Exercised</td><td>(603)</td><td>$ 46.03</td><td></td><td></td></tr><tr><td>Forfeited/canceled</td><td>(101)</td><td>$ 105.37</td><td></td><td></td></tr><tr><td>Outstanding at December 31, 2016</td><td>4,447</td><td>$ 93.09</td><td></td><td></td></tr><tr><td>Granted</td><td>1,171</td><td>$ 115.41</td><td></td><td></td></tr><tr><td>Exercised</td><td>(709)</td><td>$ 80.73</td><td></td><td></td></tr><tr><td>Forfeited/canceled</td><td>(67)</td><td>$ 105.81</td><td></td><td></td></tr><tr><td>Outstanding at December 31, 2017</td><td>4,842</td><td>$ 100.12</td><td></td><td></td></tr><tr><td>Granted</td><td>941</td><td>$ 156.55</td><td></td><td></td></tr><tr><td>Exercised</td><td>(926)</td><td>$ 81.73</td><td></td><td></td></tr><tr><td>Forfeited/canceled</td><td>(41)</td><td>$ 123.98</td><td></td><td></td></tr><tr><td>Outstanding at December 31, 2018</td><td>4,816</td><td>$ 114.48</td><td>4.2</td><td>$ 228,248</td></tr><tr><td>Exercisable at December 31, 2018</td><td>2,162</td><td>$ 100.15</td><td>3.0</td><td>$ 133,490</td></tr><tr><td>Unvested at December 31, 2018</td><td>2,654</td><td>$ 126.17</td><td>5.1</td><td>$ 94,758</td></tr></table>

The weighted-average per share fair value of options granted during the years ended December 31, 2018, 2017 and 2016 was $33.01, $23.88, and $19.19, respectively.

The total intrinsic value for options exercised during the years ended December 31, 2018, 2017 and 2016 was $78.0 million, $37.2 million and $36.8 million, respectively. Cash received from option exercises under all plans for the years ended December 31, 2018, 2017 and 2016 was approximately $74.7 million, $56.5 million, and $27.4 million, respectively. No tax benefit was realized for the tax deductions from option exercises under all plans for the years ended December 31, 2018, 2017 and 2016, respectively.



The aggregate intrinsic value for stock options in the preceding table represents the total intrinsic value based on the Company’s closing stock price of $161.89 as of December 31, 2018. The amount represents the total intrinsic value that would have been received by the holders of the stock-based awards had these awards been exercised and sold as of that date.

Additional information regarding options outstanding and exercisable at December 31, 2018 is as follows:

<table><tr><td rowspan="4">Range</td><td colspan="3">Options Outstanding</td><td colspan="3">Options Exercisable</td></tr><tr><td colspan="2">Weighted Average</td><td>Weighted</td><td colspan="2">Weighted</td><td>Weighted</td></tr><tr><td colspan="2">Remaining</td><td>Average</td><td colspan="2">Average</td><td>Average</td></tr><tr><td>Outstanding</td><td>Contractual Life</td><td>Exercise Price</td><td>Exercisable</td><td>Exercise Price</td><td></td></tr><tr><td></td><td>(in thousands)</td><td>(in years)</td><td></td><td>(in thousands)</td><td></td><td></td></tr><tr><td>$0.00 - $90.00</td><td>406</td><td>1.0</td><td>$ 68.96</td><td>406</td><td>$ 68.96</td><td></td></tr><tr><td>$90.01 - $110.00</td><td>1,609</td><td>3.5</td><td>$ 96.29</td><td>983</td><td>$ 96.08</td><td></td></tr><tr><td>$110.01 - $145.00</td><td>1,871</td><td>4.4</td><td>$ 119.15</td><td>773</td><td>$ 121.69</td><td></td></tr><tr><td>$145.01 - $175.00</td><td>930</td><td>6.2</td><td>$ 156.55</td><td>—</td><td>$ 0.00</td><td></td></tr><tr><td></td><td>4,816</td><td></td><td></td><td>2,162</td><td></td><td></td></tr></table>

The following table summarizes the activity of options outstanding that had not yet vested:

<table><tr><td rowspan="4"></td><td colspan="3">Number of Shares</td><td rowspan="4">Weighted-Average Fair Value Per Share</td></tr><tr><td colspan="3">(in thousands)</td></tr><tr><td>Unvested as of December 31, 2017</td><td>2,860</td><td>$</td><td>22.08</td></tr><tr><td>Shares granted</td><td>941</td><td>$</td><td>33.01</td></tr><tr><td>Vesting during period</td><td></td><td>(1,104)</td><td>$</td><td>21.74</td></tr><tr><td>Forfeited/canceled</td><td></td><td>(43)</td><td>$</td><td>26.32</td></tr><tr><td>Unvested as of December 31, 2018</td><td></td><td>2,654</td><td>$</td><td>26.05</td></tr></table>

As of December 31, 2018, the total unrecognized compensation expense related to unvested stock options outstanding under the Plans is $43.3 million. That cost is expected to be recognized over a weighted average period of 2.5 years.

The total fair value of options vested during 2018, 2017, and 2016 was $24.0 million, $21.4 million, and $18.5 million, respectively.



## Restricted Stock Units

The following table summarizes the Company’s restricted stock unit activity for the year ended December 31, 2018:

<table><tr><td rowspan="3"></td><td rowspan="2">Number of Shares (in thousands)</td><td colspan="2">Weighted-Average Grant Date Fair Value per Share</td></tr><tr><td></td><td></td></tr><tr><td>Outstanding at December 31, 2017</td><td>328</td><td>$ 110.20</td></tr><tr><td>Granted</td><td></td><td>138</td><td>$ 156.61</td></tr><tr><td>Vested</td><td></td><td>(129)</td><td>$ 110.93</td></tr><tr><td>Forfeited/canceled</td><td></td><td>(13)</td><td>$ 135.22</td></tr><tr><td>Outstanding at December 31, 2018</td><td></td><td>324</td><td>$ 128.69</td></tr></table>

As of December 31, 2018, total unrecognized compensation expense related to unvested restricted stock units granted under the 2010 Plan was $28.1 million and is expected to be recognized over a weighted-average period of 2.6 years.

## Employee Stock Purchase Plan

In 2008, the Board of Directors of the Company adopted the 2008 Employee Stock Purchase Plan (“2008 Purchase Plan”) which reserved 500,000 shares of Class A common stock for purchase. The 2008 Purchase Plan permits eligible employee participants to purchase Class A common stock at a price per share which is equal to 85% of the fair market value of Class A common stock on the last day of an offering period.

For the year ended December 31, 2018, 16,798 shares of Class A common stock were issued under the 2008 Purchase Plan, which resulted in cash proceeds to the Company of approximately $2.3 million, compared to the year ended December 31, 2017 when 28,232 shares of Class A common stock were issued under the 2008 Purchase Plan which resulted in cash proceeds to the Company of $3.3 million.

On May 23, 2018, the Board of Directors of the Company adopted the 2018 Employee Stock Purchase Plan (“2018 Purchase Plan”) which replaced the 2008 Purchase Plan and reserved 300,000 shares of Class A common stock for purchase. The 2018 Purchase Plan permits eligible employee participants to purchase Class A common stock at a price per share which is equal to 85% of the fair market value of Class A common stock on the last day of an offering period.

For the year ended December 31, 2018, 10,052 shares of Class A common stock were issued under the 2018 Purchase Plan, which resulted in cash proceeds to the Company of approximately $1.4 million. At December 31, 2018, 289,948 shares remained available for issuance under the 2018 Purchase Plan.

In addition, the Company recorded $0.6 million, $0.6 million, and $0.5 million of non-cash compensation expense relating to the shares issued under the 2008 Purchase Plan and 2018 Purchase Plan for each of the years ended December 31, 2018, 2017, and 2016, respectively.



## Non-Cash Compensation Expense

The table below reflects a break out by category of the non-cash compensation expense amounts recognized on the Company’s Statements of Operations for the years ended December 31, 2018, 2017, and 2016, respectively:

<table><tr><td rowspan="3"></td><td colspan="4">For the year ended December 31,</td></tr><tr><td>2018</td><td colspan="2">2017</td><td>2016</td></tr><tr><td colspan="4">(in thousands)</td></tr><tr><td>Cost of revenues</td><td>$     1,182</td><td>$     1,013</td><td>$     418</td><td></td></tr><tr><td>Selling, general and administrative</td><td>41,145</td><td>37,236</td><td>32,497</td><td></td></tr><tr><td>Total cost of non-cash compensation included in loss before provision for income taxes</td><td>42,327</td><td>38,249</td><td>32,915</td><td></td></tr><tr><td>Amount of income tax recognized in earnings</td><td>—</td><td>—</td><td>—</td><td></td></tr><tr><td>Amount charged against loss</td><td>$     42,327</td><td>$     38,249</td><td>$     32,915</td><td></td></tr></table>

In addition, the Company capitalized $0.8 million, $0.6 million and $0.5 million of non-cash compensation for the years ended December 31, 2018, 2017 and 2016, respectively, to fixed assets.

## 15. INCOME TAXES

As discussed in Note 2, the Company began operating in compliance with REIT requirements for federal income tax purposes effective January 1, 2016. As a REIT, the Company must distribute at least 90 percent of its taxable income (including dividends paid to it by its TRSs) except to the extent offset by NOLs. In addition, the Company must meet a number of other organizational and operational requirements. It is management's intention to adhere to these requirements and maintain the Company's REIT status. Most states where SBA operates conform to the federal rules recognizing REITs. Certain subsidiaries have made an election with the Company to be treated as TRSs in conjunction with the Company's REIT election; the TRS elections permit SBA to engage in certain business activities in which the REIT may not engage directly. A TRS is subject to federal and state income taxes on the income from these activities. A provision for taxes of the TRSs and of foreign branches of the REIT is included in its consolidated financial statements.

Income before provision for income taxes by geographic area is as follows:

<table><tr><td rowspan="3"></td><td colspan="4">For the year ended December 31,</td></tr><tr><td>2018</td><td colspan="2">2017</td><td>2016</td></tr><tr><td colspan="4">(in thousands)</td></tr><tr><td>Domestic</td><td>$     99,203</td><td>$     73,405</td><td>$      (28,671)</td><td></td></tr><tr><td>Foreign</td><td>(47,519)</td><td>43,486</td><td>115,974</td><td></td></tr><tr><td>Total</td><td>$     51,684</td><td>$     116,891</td><td>$     87,303</td><td></td></tr></table>



The provision for income taxes consists of the following components:

<table><tr><td rowspan="2"></td><td colspan="4">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td><td></td></tr><tr><td></td><td colspan="4">(in thousands)</td></tr><tr><td>Current provision:</td><td></td><td></td><td></td><td></td></tr><tr><td>State</td><td>$     5,764</td><td>$     5,513</td><td>$     1,535</td><td></td></tr><tr><td>Foreign</td><td>13,756</td><td>11,681</td><td>8,121</td><td></td></tr><tr><td>Total current</td><td>19,520</td><td>17,194</td><td>9,656</td><td></td></tr><tr><td>Deferred provision (benefit) for taxes:</td><td></td><td></td><td></td><td></td></tr><tr><td>Federal</td><td>(9,463)</td><td>18,736</td><td>170,177</td><td></td></tr><tr><td>State</td><td>(1,412)</td><td>(241)</td><td>22,992</td><td></td></tr><tr><td>Foreign</td><td>(16,673)</td><td>9,155</td><td>30,425</td><td></td></tr><tr><td>Change in valuation allowance</td><td>12,261</td><td>(31,607)</td><td>(222,185)</td><td></td></tr><tr><td>Total deferred</td><td>(15,287)</td><td>(3,957)</td><td>1,409</td><td></td></tr><tr><td>Total provision for income taxes</td><td>$     4,233</td><td>$     13,237</td><td>$     11,065</td><td></td></tr></table>

A reconciliation of the provision for income taxes at the statutory U.S. Federal tax rate (21% for 2018 and 35% for 2017 and 2016) and the effective income tax rate is as follows:

<table><tr><td rowspan="3"></td><td colspan="4">For the year ended December 31,</td></tr><tr><td>2018</td><td>2017</td><td>2016</td><td></td></tr><tr><td colspan="4">(in thousands)</td></tr><tr><td>Statutory federal expense</td><td>$     10,854</td><td>$     40,912</td><td>$     30,555</td><td></td></tr><tr><td>Rate and permanent differences on non-U.S. earnings  \( {}^{(1)} \)</td><td>3,620</td><td>3,690</td><td>(4,739)</td><td></td></tr><tr><td>State and local tax expense</td><td>4,824</td><td>5,415</td><td>3,941</td><td></td></tr><tr><td>REIT adjustment</td><td>(22,241)</td><td>(34,346)</td><td>205,317</td><td></td></tr><tr><td>Permanent differences</td><td>437</td><td>(1,365)</td><td>(3,577)</td><td></td></tr><tr><td>Tax Act impact on deferred taxes</td><td>(6,040)</td><td>31,547</td><td>—</td><td></td></tr><tr><td>Other</td><td>518</td><td>(1,009)</td><td>1,753</td><td></td></tr><tr><td>Valuation allowance</td><td>12,261</td><td>(31,607)</td><td>(222,185)</td><td></td></tr><tr><td>Provision for income taxes</td><td>$     4,233</td><td>$     13,237</td><td>$     11,065</td><td></td></tr></table>

(1) This item includes the effect of foreign exchange rate changes which were previously shown on a separate line.



The components of the net deferred income tax asset (liability) accounts are as follows:

<table><tr><td rowspan="2"></td><td colspan="2">As of December 31,</td></tr><tr><td>2018</td><td>2017</td></tr><tr><td></td><td colspan="2">(in thousands)</td></tr><tr><td>Noncurrent deferred tax assets:</td><td></td><td></td></tr><tr><td>Net operating losses</td><td>$ 63,622</td><td>$ 65,257</td></tr><tr><td>Property, equipment, and intangible basis differences</td><td>4,793</td><td>3,038</td></tr><tr><td>Accrued liabilities</td><td>9,659</td><td>11,933</td></tr><tr><td>Non-cash compensation</td><td>16,641</td><td>7,500</td></tr><tr><td>Deferred revenue</td><td>2,005</td><td>2,110</td></tr><tr><td>Allowance for doubtful accounts</td><td>5,691</td><td>5,978</td></tr><tr><td>Currency translation</td><td>56,604</td><td>34,895</td></tr><tr><td>Other</td><td>2,480</td><td>2,698</td></tr><tr><td>Valuation allowance</td><td>(50,628)</td><td>(38,802)</td></tr><tr><td>Total noncurrent deferred tax assets, net (1)</td><td>110,867</td><td>94,607</td></tr><tr><td>Noncurrent deferred tax liabilities:</td><td></td><td></td></tr><tr><td>Property, equipment, and intangible basis differences</td><td>(114,652)</td><td>(98,589)</td></tr><tr><td>Straight-line rents</td><td>(20,469)</td><td>(22,740)</td></tr><tr><td>Deferred foreign withholding taxes</td><td>(6,225)</td><td>—</td></tr><tr><td>Deferred lease costs</td><td>(2,192)</td><td>(2,242)</td></tr><tr><td>Other</td><td>(123)</td><td>(136)</td></tr><tr><td>Total noncurrent deferred tax liabilities, net (1)</td><td>$ (32,794)</td><td>$ (29,100)</td></tr></table>

(1) Of these amounts, $18,330 and $51,124 are included in Other assets and Other long-term liabilities, respectively on the accompanying Consolidated Balance Sheets as of December 31, 2018. As of December 31, 2017, $1,670 and $30,770 are included in Other assets and Other long-term liabilities on the accompanying Consolidated Balance Sheet.

A deferred tax asset is reduced by a valuation allowance if based on the weight of all available evidence, including both positive and negative evidence, it is more likely than not (a likelihood of more than 50%) that the value of such assets will not be realized. The valuation allowance should be sufficient to reduce the deferred tax asset to the amount that is more likely than not to be realized. The realization of deferred tax assets, including carryforwards and deductible temporary differences, depends upon the existence of sufficient taxable income of the same character during the carryback or carryforward period. All sources of taxable income available to realize the deferred tax asset, including the future reversal of existing temporary differences, future taxable income exclusive of reversing temporary differences and carryforwards, taxable income in carryback years and tax-planning strategies, should be considered.

The Company has recorded a valuation allowance for certain deferred tax assets as management believes that it is not “more-likely-than-not” that the Company will generate sufficient taxable income in future periods to recognize the assets. Valuation allowances of $50.6 million and $38.8 million were being carried to offset net deferred income tax assets as of December 31, 2018 and 2017, respectively. The net change in the valuation allowance for the years ended December 31, 2018 and 2017 was a decrease of $11.8 million and an increase of $31.4 million, respectively. During 2018, the Company released the valuation allowance on the majority of its deferred tax assets related to its Brazil operations as it was determined that it is “more-likely-than-not” the Brazil operations will generate sufficient taxable income to recognize the assets.

The Company has available at December 31, 2018, a federal NOL carry-forward of approximately $863.1 million. $857.5 million of these NOL carry-forwards will expire between 2024 and 2037, and $5.6 million have an indefinite carry-forward. As of December 31, 2018, $755.4 million of the federal NOLs are attributes of the REIT. The Company may use these NOLs to offset its



REIT taxable income, and thus any required distributions to shareholders may be reduced or eliminated until such time as the NOLs have been fully utilized. The Internal Revenue Code places limitations upon the future availability of NOLs based upon changes in the equity of the Company. If these occur, the ability of the Company to offset future income with existing NOLs may be limited. In addition, the Company has available at December 31, 2018, a foreign NOL carry-forward of $85.0 million and a net state operating tax loss carry-forward of approximately $412.2 million. These net operating tax loss carry-forwards begin to expire in 2020.

The U.S. tax losses generated in tax years 2001 through 2013 remain subject to adjustment, and tax years 2015 through 2018 are open to examination by the major jurisdictions in which the Company operates.

The Company has removed the permanent reinvestment assertion as of December 31, 2018 for all foreign earnings of our foreign jurisdictions except for Argentina. The Company recorded deferred foreign withholding taxes of $6.2 million at December 31, 2018 for this change in the Company’s permanent reinvestment assertion and will accrue additional withholding taxes as foreign earnings are generated. No additional income taxes have been provided for any additional outside basis difference inherent in these entities, as these amounts continue to be indefinitely reinvested in foreign operations. Determining the amount of unrecognized deferred tax liability for any additional outside basis differences in these entities is not practicable.

On December 22, 2017, the U.S. government enacted comprehensive tax legislation in the form of the Tax Cuts and Jobs Act (the "Tax Act") that significantly revised the U.S. tax code effective January 1, 2018 by, among other things, lowering the corporate income tax rate from a top marginal rate of 35% to a flat 21%, imposing a mandatory one-time deemed repatriation of foreign earnings (commonly referred to as the "transition tax"), creating new taxes on certain foreign-sourced income, and limiting deductibility of interest expense and certain executive compensation. The Company applied the guidance in SAB 118 when accounting for the enactment-date effects of the Tax Act in 2017 and throughout 2018. At December 31, 2017, the Company made a reasonable estimate of the one-time transition tax on accumulated foreign earnings as well as the impact of the Tax Act on its existing deferred tax balances. During the fourth quarter of 2018, the Company completed its accounting for all of the enactment-date income tax effects of the Tax Act.

The one-time transition tax is based on the Company’s total post-1986 earnings and profits (“E&P”), which was previously deferred from U.S. income taxes. The Company recorded $52.4 million as a provisional amount of the one-time transition taxable income at December 31, 2017. During 2018, the Company finalized its calculations of the post-1986 E&P as well as the cash balances of the foreign subsidiaries whose earnings were subject to the transition tax. Following the completion of this analysis, the Company reduced its transition taxable income to $49.2 million. Subsequent to the Company’s year-end, the Treasury Department finalized regulations for the calculation of the transition tax, and the Company is analyzing the impact of these regulations on its calculation. The Company has elected to include the transition taxable income inclusion over the eight-year period provided in the Tax Act. As of December 31, 2018, the remaining balance of the Company’s transition tax inclusion amount is $41.3 million, which will be included in taxable income over the next six years.

As of December 31, 2017, the Company recorded a reduction to its deferred tax asset and offsetting valuation allowance in the amount of $12.3 million related to new limitations on the deductibility of executive compensation in the Tax Act. Upon further analysis of the Tax Act during 2018, the Company determined that $6.0 million of the deferred tax asset should be recorded, which amount is offset by a valuation allowance. The Company will elect qualifying real property trade or business status for the REIT, and is thus not subject to the interest limitation provisions of the Tax Act.

The Tax Act subjects a U.S. shareholder to tax on Global Intangible Low-Taxed Income (“GILTI”) earned by certain foreign subsidiaries. The FASB Staff Q&A, Topic 740, No. 5, Accounting for Global Intangible Low-Taxed Income, states that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or to provide for the tax expense related to GILTI in the year the tax is incurred as a period expense only. The Company has elected to account for GILTI in the year it is incurred. The income inclusion for GILTI for 2018 is $10.2 million.

## 16. COMMITMENTS AND CONTINGENCIES

## Leases

The Company is obligated under various non-cancelable operating leases for land, office space, equipment and site leases that expire at various times through December 2152. In addition, the Company is obligated under various non-cancelable capital leases for vehicles that expire at various times through August 2022.



The annual minimum lease payments under non-cancelable operating (primarily ground or land leases) and capital leases for the next five years as of December 31, 2018 are as follows (in thousands):

<table><tr><td>For the year ended December 31,</td><td colspan="2">Capital Leases</td><td colspan="2">Operating Leases</td></tr><tr><td>2019</td><td>$</td><td>883</td><td>$</td><td>237,730</td></tr><tr><td>2020</td><td></td><td>482</td><td></td><td>239,208</td></tr><tr><td>2021</td><td></td><td>303</td><td></td><td>241,090</td></tr><tr><td>2022</td><td></td><td>86</td><td></td><td>242,320</td></tr><tr><td>2023</td><td></td><td>—</td><td></td><td>243,476</td></tr><tr><td>Total minimum lease payments</td><td></td><td>1,754</td><td></td><td></td></tr><tr><td>Less: amount representing interest</td><td></td><td>(83)</td><td></td><td></td></tr><tr><td>Present value of future payments</td><td></td><td>1,671</td><td></td><td></td></tr><tr><td>Less: current obligations</td><td></td><td>(860)</td><td></td><td></td></tr><tr><td>Long-term obligations</td><td>$</td><td>811</td><td></td><td></td></tr></table>

Future minimum rental payments under noncancelable ground leases include payments for certain renewal periods at the Company’s option because failure to renew could result in a loss of the applicable tower and related revenue from tenant leases, thereby making it reasonably assured that the Company will renew the lease. The majority of operating leases provide for renewal at varying escalations. Fixed rate escalations have been included in the table disclosed above.

Rent expense for operating leases was $273.5 million, $266.4 million and $253.7 million for the years ended December 31, 2018, 2017 and 2016, respectively. In addition, certain of the Company’s leases include contingent rent provisions which provide for the lessor to receive additional rent upon the attainment of certain tower operating results and/or lease-up. Contingent rent expense for the years ended December 31, 2018, 2017 and 2016 was $27.1 million, $26.6 million and $25.0 million, respectively.

## Tenant Leases

The annual minimum tower lease income to be received for tower space and antenna rental under non-cancelable operating leases for the next five years as of December 31, 2018 is as follows:

<table><tr><td>For the year ended December 31,</td><td>(in thousands)</td></tr><tr><td>2019</td><td>$ 1,529,902</td></tr><tr><td>2020</td><td>1,326,108</td></tr><tr><td>2021</td><td>1,075,675</td></tr><tr><td>2022</td><td>815,219</td></tr><tr><td>2023</td><td>598,987</td></tr></table>

The Company’s tenant leases provide for annual escalations and multiple renewal periods, at the tenant’s option. The tenant rental payments disclosed in the table above do not assume exercise of any tenant renewal options, however, fixed rate escalations have been included for the current term.

## Litigation

The Company is involved in various claims, lawsuits and proceedings arising in the ordinary course of business. While there are uncertainties inherent in the ultimate outcome of such matters and it is impossible to presently determine the ultimate costs that may be incurred, management believes the resolution of such uncertainties and the incurrence of such costs will not have a material adverse effect on the Company’s consolidated financial position, results of operations or liquidity.



## Contingent Purchase Obligations

From time to time, the Company agrees to pay additional consideration (or earnouts) for acquisitions if the towers or businesses that are acquired meet or exceed certain performance targets in the one to three years after they have been acquired. Please refer to Note 3.

## 17. DEFINED CONTRIBUTION PLAN

The Company has a defined contribution profit sharing plan under Section 401(k) of the Internal Revenue Code that provides for voluntary employee contributions up to the limitations set forth in Section 402(g) of the Internal Revenue Code. Employees have the opportunity to participate following completion of three months of employment and must be 21 years of age. Employer matching begins immediately upon the employee’s participation in the plan.

The Company makes a discretionary matching contribution of 75% of an employee’s contributions up to a maximum of $4,000 annually. Company matching contributions were approximately $2.1 million, $2.0 million and $2.0 million for the years ended December 31, 2018, 2017 and 2016, respectively.

## 18. SEGMENT DATA

The Company operates principally in two business segments: site leasing and site development. The Company’s site leasing business includes two reportable segments, domestic site leasing and international site leasing. The Company’s business segments are strategic business units that offer different services. They are managed separately based on the fundamental differences in their operations. The site leasing segment includes results of the managed and sublease businesses. The site development segment includes the results of both consulting and construction related activities. The Company’s Chief Operating Decision Maker utilizes segment operating profit and operating income as his two measures of segment profit in assessing performance and allocating resources at the reportable segment level. The Company has applied the aggregation criteria to operations within the international site leasing segment on a basis that is consistent with management’s review of information and performance evaluations of the individual markets in this region.

Revenues, cost of revenues (exclusive of depreciation, accretion and amortization), capital expenditures (including assets acquired through the issuance of shares of the Company’s Class A common stock) and identifiable assets pertaining to the segments in which the Company continues to operate are presented below.



<table><tr><td></td><td colspan="2">Domestic Site</td><td rowspan="2">Int&#x27;l Site Leasing</td><td rowspan="2">Site Development</td><td colspan="2">Not Identified</td></tr><tr><td></td><td>Leasing</td><td></td><td>by Segment</td><td>Total</td></tr><tr><td>For the year ended December 31, 2018</td><td></td><td></td><td></td><td>(in thousands)</td><td></td><td></td></tr><tr><td>Revenues</td><td>$     1,400,095</td><td>$     340,339</td><td>$     125,261</td><td>$      —</td><td>$     1,865,695</td><td></td></tr><tr><td>Cost of revenues  \( ^{(2)} \)</td><td>266,131</td><td>106,165</td><td>96,499</td><td>—</td><td>468,795</td><td></td></tr><tr><td>Operating profit</td><td>1,133,964</td><td>234,174</td><td>28,762</td><td>—</td><td>1,396,900</td><td></td></tr><tr><td>Selling, general, and administrative</td><td>72,879</td><td>27,082</td><td>16,215</td><td>26,350</td><td>142,526</td><td></td></tr><tr><td>Acquisition related adjustments and expenses</td><td>5,268</td><td>5,693</td><td>—</td><td>—</td><td>10,961</td><td></td></tr><tr><td>Asset impairment and decommission costs</td><td>18,857</td><td>7,932</td><td>345</td><td>—</td><td>27,134</td><td></td></tr><tr><td>Depreciation, amortization and accretion</td><td>511,823</td><td>151,570</td><td>2,556</td><td>6,164</td><td>672,113</td><td></td></tr><tr><td>Operating income (loss)</td><td>525,137</td><td>41,897</td><td>9,646</td><td>(32,514)</td><td>544,166</td><td></td></tr><tr><td>Other expense (principally interest expense and other expense)</td><td></td><td></td><td></td><td>(492,482)</td><td>(492,482)</td><td></td></tr><tr><td>Income before provision for income taxes</td><td></td><td></td><td></td><td></td><td>51,684</td><td></td></tr><tr><td>Cash capital expenditures  \( ^{(3)} \)</td><td>338,610</td><td>258,785</td><td>1,561</td><td>3,724</td><td>602,680</td><td></td></tr><tr><td>For the year ended December 31, 2017</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Revenues</td><td>$     1,308,389</td><td>$     314,784</td><td>$     104,501</td><td>$      —</td><td>$     1,727,674</td><td></td></tr><tr><td>Cost of revenues  \( ^{(2)} \)</td><td>260,826</td><td>98,701</td><td>86,785</td><td>—</td><td>446,312</td><td></td></tr><tr><td>Operating profit</td><td>1,047,563</td><td>216,083</td><td>17,716</td><td>—</td><td>1,281,362</td><td></td></tr><tr><td>Selling, general, and administrative</td><td>67,263</td><td>24,320</td><td>15,433</td><td>23,681</td><td>130,697</td><td></td></tr><tr><td>Acquisition related adjustments and expenses</td><td>8,171</td><td>4,196</td><td>—</td><td>—</td><td>12,367</td><td></td></tr><tr><td>Asset impairment and decommission costs</td><td>29,523</td><td>6,994</td><td>180</td><td>—</td><td>36,697</td><td></td></tr><tr><td>Depreciation, amortization and accretion</td><td>498,842</td><td>135,155</td><td>2,580</td><td>6,523</td><td>643,100</td><td></td></tr><tr><td>Operating income (loss)</td><td>443,764</td><td>45,418</td><td>(477)</td><td>(30,204)</td><td>458,501</td><td></td></tr><tr><td>Other expense (principally interest expense and other expense)</td><td></td><td></td><td></td><td>(341,610)</td><td>(341,610)</td><td></td></tr><tr><td>Income before provision for income taxes</td><td></td><td></td><td></td><td></td><td>116,891</td><td></td></tr><tr><td>Cash capital expenditures  \( ^{(3)} \)</td><td>225,074</td><td>358,691</td><td>1,221</td><td>3,859</td><td>588,845</td><td></td></tr><tr><td>For the year ended December 31, 2016</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Revenues</td><td>$     1,273,866</td><td>$     264,204</td><td>$     95,055</td><td>$      —</td><td>$     1,633,125</td><td></td></tr><tr><td>Cost of revenues  \( ^{(2)} \)</td><td>260,941</td><td>81,274</td><td>78,682</td><td>—</td><td>420,897</td><td></td></tr><tr><td>Operating profit</td><td>1,012,925</td><td>182,930</td><td>16,373</td><td>—</td><td>1,212,228</td><td></td></tr><tr><td>Selling, general, and administrative  \( ^{(4)} \)</td><td>72,701</td><td>35,897</td><td>13,039</td><td>21,712</td><td>143,349</td><td></td></tr><tr><td>Acquisition related adjustments and expenses</td><td>6,233</td><td>6,907</td><td>—</td><td>—</td><td>13,140</td><td></td></tr><tr><td>Asset impairment and decommission costs</td><td>26,073</td><td>1,824</td><td>—</td><td>2,345</td><td>30,242</td><td></td></tr><tr><td>Depreciation, amortization and accretion</td><td>509,108</td><td>119,466</td><td>3,402</td><td>6,213</td><td>638,189</td><td></td></tr><tr><td>Operating income (loss)</td><td>398,810</td><td>18,836</td><td>(68)</td><td>(30,270)</td><td>387,308</td><td></td></tr><tr><td>Other expense (principally interest expense and other expense)</td><td></td><td></td><td></td><td>(300,005)</td><td>(300,005)</td><td></td></tr><tr><td>Income before provision for income taxes</td><td></td><td></td><td></td><td></td><td>87,303</td><td></td></tr><tr><td>Cash capital expenditures  \( ^{(3)} \)</td><td>310,256</td><td>102,282</td><td>1,955</td><td>3,710</td><td>418,203</td><td></td></tr></table>



<table><tr><td rowspan="2"></td><td colspan="2">Domestic Site</td><td colspan="2">Int&#x27;l Site</td><td colspan="2">Site</td><td colspan="2">Not Identified</td></tr><tr><td colspan="2">Leasing</td><td colspan="2">Leasing</td><td colspan="2">Development</td><td colspan="2">by Segment  \( {}^{(1)} \)</td></tr><tr><td>Assets</td><td></td><td></td><td></td><td></td><td colspan="4">(in thousands)</td></tr><tr><td>As of December 31, 2018</td><td>$</td><td>5,035,826</td><td>$</td><td>2,042,800</td><td>$</td><td>60,775</td><td>$</td><td>74,306</td></tr><tr><td>As of December 31, 2017</td><td>$</td><td>5,171,190</td><td>$</td><td>2,028,479</td><td>$</td><td>49,487</td><td>$</td><td>71,049</td></tr></table>

(1) Assets not identified by segment consist primarily of general corporate assets.

(2) Excludes depreciation, amortization, and accretion.

(3) Includes cash paid for capital expenditures and acquisitions and vehicle capital lease additions.

(4) International site leasing includes the impact of the $16,498 Oi reserve for the year ended December 31, 2016.

Other than Brazil, no foreign country represented a material amount of the Company’s total revenues in any of the periods presented. For the year ended December 31, 2018, 2017, and 2016, site leasing revenue in Brazil was $221.5 million, 217.4 million, and $178.3 million, respectively. Total long-lived assets in Brazil were $1,031.6 million and $1,278.9 million as of December 31, 2018, and 2017, respectively.

## 19. QUARTERLY FINANCIAL DATA (unaudited)

<table><tr><td rowspan="3"></td><td colspan="5">Quarter Ended</td></tr><tr><td>December 31,</td><td colspan="2">September 30,</td><td>June 30,</td><td>March 31,</td></tr><tr><td>2018</td><td>2018</td><td>2018</td><td>2018</td><td></td></tr><tr><td></td><td colspan="5">(in thousands, except per share amounts)</td></tr><tr><td>Revenues</td><td>$</td><td>483,849</td><td>$</td><td>467,221</td><td>$</td></tr><tr><td>Operating income</td><td>150,321</td><td>138,006</td><td>125,870</td><td>129,969</td><td></td></tr><tr><td>Depreciation, accretion, and amortization</td><td>(169,454)</td><td>(167,703)</td><td>(169,558)</td><td>(165,398)</td><td></td></tr><tr><td>Loss from extinguishment of debt, net</td><td>—</td><td>—</td><td>(13,798)</td><td>(645)</td><td></td></tr><tr><td>Net income (loss)</td><td>57,152</td><td>16,144</td><td>(57,392)</td><td>31,547</td><td></td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net income (loss) per common share - basic</td><td>$</td><td>0.50</td><td>$</td><td>(0.50)</td><td>$</td></tr><tr><td>Net income (loss) per common share - diluted</td><td>0.50</td><td>0.14</td><td>(0.50)</td><td>0.27</td><td></td></tr><tr><td></td><td></td><td></td><td colspan="3">Quarter Ended</td></tr><tr><td></td><td>December 31,</td><td colspan="2">September 30,</td><td>June 30,</td><td>March 31,</td></tr><tr><td></td><td>2017</td><td>2017</td><td>2017</td><td>2017</td><td></td></tr><tr><td></td><td colspan="5">(in thousands, except per share amounts)</td></tr><tr><td>Revenues</td><td>$</td><td>443,073</td><td>$</td><td>433,945</td><td>$</td></tr><tr><td>Operating income</td><td>119,081</td><td>117,011</td><td>114,590</td><td>107,819</td><td></td></tr><tr><td>Depreciation, accretion, and amortization</td><td>(162,643)</td><td>(161,907)</td><td>(159,520)</td><td>(159,030)</td><td></td></tr><tr><td>Loss from extinguishment of debt, net</td><td>—</td><td>—</td><td>(1,961)</td><td>—</td><td></td></tr><tr><td>Net income</td><td>7,660</td><td>49,161</td><td>9,233</td><td>37,600</td><td></td></tr><tr><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Net income per common share - basic (1)</td><td>$</td><td>0.07</td><td>$</td><td>0.08</td><td>$</td></tr><tr><td>Net income per common share - diluted</td><td>0.06</td><td>0.41</td><td>0.08</td><td>0.31</td><td></td></tr></table>

(1) The sums of quarterly earnings per share data may not equal annual data due to rounding.



Basic and diluted net income (loss) per share is computed by dividing net income (loss) by the weighted average number of shares for the period. Potentially dilutive instruments have been excluded from the computation of diluted loss per share as their impact would have been anti-dilutive.

Because net income (loss) per share amounts are calculated using the weighted average number of common and dilutive common shares outstanding during each quarter, the sum of the per share amounts for the four quarters may not equal the total loss per share amounts for the year.

## 20. ACCRUED EXPENSES

The Company’s accrued expenses are comprised of the following:

<table><tr><td rowspan="2"></td><td>As of</td><td>As of</td></tr><tr><td>December 31, 2018</td><td>December 31, 2017</td></tr><tr><td></td><td colspan="2">(in thousands)</td></tr><tr><td>Salaries and benefits</td><td>$     16,015</td><td>$     13,506</td></tr><tr><td>Real estate and property taxes</td><td>7,928</td><td>7,125</td></tr><tr><td>Non-cash capital expenditures</td><td>12,387</td><td>12,408</td></tr><tr><td>Other</td><td>27,335</td><td>36,823</td></tr><tr><td>Total accrued expenses</td><td>$     63,665</td><td>$     69,862</td></tr></table>



SBA Communications Corporation’s (“SBA” or “we”) Class A Common Stock began trading on The Nasdaq National Market on June 16, 1999 when its initial public offering commenced and is currently traded on the Nasdaq Global Select Market. The following graph shows the total return to the shareholders of an investment in SBA’s Class A Common Stock as compared to (1) an investment in the S&P 500 Index, (2) an investment in the FTSE NAREIT All Equity REITs Index and (3) an investment in a peer group made up of American Tower Corporation and Crown Castle International Corporation, the comparable large domestic public wireless tower companies.

Total shareholder return is determined by dividing (1) the sum of (A) the cumulative amount of dividends for a given period (assuming dividend reinvestment) and (B) the change in share price between the beginning and end of the measurement period, by (2) the share price at the beginning of the measurement period.

Total Shareholder Returns



<table><tr><td rowspan="2"></td><td rowspan="2">Base Period 12/31/13</td><td rowspan="2">2014</td><td colspan="4">Years Ending</td></tr><tr><td>2015</td><td>2016</td><td>2017</td><td>2018</td></tr><tr><td>SBA Communications Corporation</td><td>$100.00</td><td>$123.29</td><td>$116.95</td><td>$114.94</td><td>$181.83</td><td>$180.20</td></tr><tr><td>S&amp;P 500 Index</td><td>$100.00</td><td>$113.69</td><td>$115.26</td><td>$129.05</td><td>$157.22</td><td>$150.33</td></tr><tr><td>Large Public Tower Company Peers</td><td>$100.00</td><td>$118.76</td><td>$126.18</td><td>$136.74</td><td>$185.58</td><td>$201.15</td></tr><tr><td>FTSE NAREIT All Equity REITs Index</td><td>$100.00</td><td>$128.03</td><td>$131.64</td><td>$143.00</td><td>$155.41</td><td>$149.12</td></tr></table>

Reflects $100 invested on December 31, 2013 in (1) the Class A Common Stock of SBA, (2) the basket of companies comprising the S&P 500 Index, (3) the companies comprising the group of Large Public Tower Company Peers, and (4) the basket of companies comprising the FTSE NAREIT All Equity REITs Index.



SBA often makes disclosures of non-GAAP financial measures, such as (1) Tower Cash Flow and Tower Cash Flow Margin; (2) Adjusted EBITDA and Annualized Adjusted EBITDA; (3) Net Debt and Leverage Ratio; and (4) Return on Invested Capital. Following is a reconciliation of these non-GAAP financial measures to their most comparable GAAP measures and the other information required by Regulation G. Adjusted EBITDA, which is included in this annual report, is discussed and included in our Form 10-K which accompanies this annual report.

We believe that Tower Cash Flow and Tower Cash Flow Margin are useful indicators of the performance of our site leasing operations.

We believe that Adjusted EBITDA and Annualized Adjusted EBITDA are useful to investors or other interested parties in evaluating our financial performance. Adjusted EBITDA is the primary measure used by management (1) to evaluate the economic productivity of our operations and (2) for purposes of making decisions about allocating resources to, and assessing the performance of, our operations. Management believes that Adjusted EBITDA helps investors or other interested parties meaningfully evaluate and compare the results of our operations (1) from period to period and (2) to our competitors, by excluding the impact of our capital structure (primarily interest charges from our outstanding debt) and asset base (primarily depreciation, amortization and accretion) from our financial results. Management also believes Adjusted EBITDA is frequently used by investors or other interested parties in the evaluation of REITs. In addition, Adjusted EBITDA is similar to the measure of current financial performance generally used in our debt covenant calculations. Adjusted EBITDA should be considered only as a supplement to net income computed in accordance with GAAP as a measure of our performance.

We believe that Net Debt and Leverage Ratio provide investors a more complete understanding of our net debt and leverage position as they include the full principal amount of our debt which will be due at maturity and are net of our cash and cash equivalents, short-term restricted cash, and short-term investments.

We believe that Return on Invested Capital is useful to investors as a measure of the effectiveness of the use of capital in our operations.

In addition, Tower Cash Flow, Adjusted EBITDA, Net Debt and Leverage Ratio are components of the calculations used by our lenders to determine compliance with certain covenants under our debt instruments. These non-GAAP financial measures are not intended to be an alternative to any of the financial measures provided in our results of operations or our balance sheet as determined in accordance with GAAP.



The table below sets forth the reconciliation of Domestic Tower Cash Flow to its most comparable GAAP measurement and the calculation of Domestic Tower Cash Flow Margin.

<table><tr><td rowspan="3"></td><td colspan="2">For the quarter ended December 31,</td></tr><tr><td>2018</td><td>2017</td></tr><tr><td colspan="2">(\( in thousands)</td></tr><tr><td>Site leasing revenue</td><td>$ 358,203</td><td>$ 333,539</td></tr><tr><td>Non-cash straight-line leasing revenue</td><td>(1,782)</td><td>(669)</td></tr><tr><td>Cash site leasing revenue</td><td>356,421</td><td>332,870</td></tr><tr><td>Site leasing cost of revenues (excluding depreciation, accretion, and amortization)</td><td>(66,498)</td><td>(64,922)</td></tr><tr><td>Non-cash straight-line ground lease expense</td><td>5,513</td><td>6,439</td></tr><tr><td>Tower Cash Flow</td><td>$ 295,436</td><td>$ 274,387</td></tr><tr><td>Tower Cash Flow Margin</td><td>82.9%</td><td>82.4%</td></tr></table>

## Adjusted EBITDA and Annualized Adjusted EBITDA

The table below sets forth the reconciliation of Adjusted EBITDA to its most comparable GAAP measurement and the calculation of Annualized Adjusted EBITDA. See our Form 10-K which accompanies this annual report for a discussion and reconciliation of Adjusted EBITDA.

<table><tr><td rowspan="3"></td><td colspan="3">For the quarter ended December 31,</td></tr><tr><td>2018</td><td colspan="2">2017</td></tr><tr><td colspan="3">(\( in thousands)</td></tr><tr><td>Net income (loss)</td><td>$ 57,152</td><td>$</td><td>7,660</td></tr><tr><td>Non-cash straight-line leasing revenue</td><td>(2,953)</td><td></td><td>(3,979)</td></tr><tr><td>Non-cash straight-line ground lease expense</td><td>5,884</td><td></td><td>7,389</td></tr><tr><td>Non-cash compensation</td><td>10,187</td><td></td><td>9,355</td></tr><tr><td>Other (income) / expense</td><td>(24,550)</td><td></td><td>18,636</td></tr><tr><td>Acquisition related adjustments and expenses</td><td>1,789</td><td></td><td>5,510</td></tr><tr><td>Asset impairment and decommission costs</td><td>4,356</td><td></td><td>10,789</td></tr><tr><td>Interest income</td><td>(1,760)</td><td></td><td>(2,689)</td></tr><tr><td>Total interest expense</td><td>103,601</td><td></td><td>92,403</td></tr><tr><td>Depreciation, accretion and amortization</td><td>169,454</td><td></td><td>162,643</td></tr><tr><td>Provision for taxes</td><td>16,105</td><td></td><td>2,347</td></tr><tr><td>Adjusted EBITDA</td><td>$ 339,265</td><td>$</td><td>310,064</td></tr><tr><td>Annualized Adjusted EBITDA</td><td>$ 1,357,060</td><td>$</td><td>1,240,256</td></tr></table>



Net Debt is calculated using the notional principal amount of outstanding debt. Under GAAP policies, the notional principal amount of SBA’s outstanding debt is not necessarily reflected on the face of SBA’s financial statements. The table below sets forth the reconciliation of Net Debt to its most comparable GAAP measurement and the calculation of Leverage Ratio.

<table><tr><td rowspan="2"></td><td colspan="2">As of December 31, 2018</td></tr><tr><td colspan="2">(in thousands)</td></tr><tr><td>2013-2C Tower Securities</td><td>$     575,000</td><td></td></tr><tr><td>2014-1C Tower Securities</td><td>920,000</td><td></td></tr><tr><td>2014-2C Tower Securities</td><td>620,000</td><td></td></tr><tr><td>2015-1C Tower Securities</td><td>500,000</td><td></td></tr><tr><td>2016-1C Tower Securities</td><td>700,000</td><td></td></tr><tr><td>2017-1C Tower Securities</td><td>760,000</td><td></td></tr><tr><td>2018-1C Tower Securities</td><td>640,000</td><td></td></tr><tr><td>Revolving Credit Facility</td><td>325,000</td><td></td></tr><tr><td>2018 Term Loan</td><td>2,388,000</td><td></td></tr><tr><td>Total secured debt</td><td>7,428,000</td><td></td></tr><tr><td>2014 Senior Notes</td><td>750,000</td><td></td></tr><tr><td>2016 Senior Notes</td><td>1,100,000</td><td></td></tr><tr><td>2017 Senior Notes</td><td>750,000</td><td></td></tr><tr><td>Total unsecured debt</td><td>2,600,000</td><td></td></tr><tr><td>Total debt</td><td>$     10,028,000</td><td></td></tr><tr><td>Less: Cash and cash equivalents, short-term restricted cash and short-term investments</td><td>(176,147)</td><td></td></tr><tr><td>Net debt</td><td>$     9,851,853</td><td></td></tr><tr><td>Divided by: Annualized Adjusted EBITDA</td><td>$     1,357,060</td><td></td></tr><tr><td>Leverage Ratio</td><td>7.3x</td><td></td></tr></table>

## Return on Invested Capital

The table below sets forth the reconciliation of Return on Invested Capital.

<table><tr><td rowspan="2"></td><td colspan="2">For the quarter ended December 31, 2018</td></tr><tr><td colspan="2">(in thousands)</td></tr><tr><td>Annualized Adjusted EBITDA</td><td>$     1,357,060</td><td></td></tr><tr><td>Less: Annualized cash taxes</td><td>(13,868)</td><td></td></tr><tr><td>Numerator</td><td>1,343,192</td><td></td></tr><tr><td>Historical Gross Property and Equipment</td><td>6,227,133</td><td></td></tr><tr><td>Historical Gross Intangibles</td><td>6,812,456</td><td></td></tr><tr><td>Denominator</td><td>13,039,589</td><td></td></tr><tr><td>Return on Invested Capital</td><td>10.3%</td><td></td></tr></table>



This annual report contains forward-looking statements that concern expectations, beliefs, projections, strategies, anticipated events or trends regarding (1) the growth and development of the wireless industry in our domestic markets and international markets, the drivers of such growth, emerging technologies and the key industry growth catalysts, (2) the continued rollout of 4G technology and the future rollout of 5G technology, the timing of such rollout and the geographic focus of deployment, (3) the infrastructure needed to meet future growth in demand and our positioning to participate in such growth, including the continued need for macro sites, (4) future customer activity levels, investment levels and spectrum deployments, (5) our intent to adapt to changes in the wireless network ecosystem, (6) our intent to target exclusive assets with similar attributes to our existing tower portfolio in addition to traditional tower acquisitions, (7) our portfolio growth goals, (8) our capital allocation strategy with respect to portfolio growth and stock repurchases and their impact on shareholder value creation, (9) our intent to focus on maximizing our core tower business, (10) the Brazilian economy and future changes in the Brazilian currency as it relates to fluctuations in currency exchange rates, (11) our balance sheet strategy, including our target leverage range, and the availability of future financing, and (12) our growth and financial results for 2019. These forward-looking statements are qualified in their entirety by cautionary statements set forth under “Special Note Regarding Forward-Looking Statements” and the risk factor disclosures contained in our Form 10-K filed with the Securities and Exchange Commission on February 28, 2019 and included in this annual report.



## SBA
COMMUNICATIONS

## DIRECTORS

Steven E. Bernstein
Chairman of the Board

Jeffrey A. Stoops
Director, President and
Chief Executive Officer

Kevin L. Beebe
Director

Brian C. Carr
Director

## SENIOR MANAGEMENT

Jeffrey A. Stoops
President and Chief Executive Officer

Kurt Bagwell
President, International

Brendan T. Cavanagh
Executive Vice President
and Chief Financial Officer

Mark R. Ciarfella
Executive Vice President,
Operations

Thomas P. Hunt
Executive Vice President,
Chief Administrative Officer
and General Counsel

Dipan D. Patel
Executive Vice President,
Strategy, Technology and
New Business Initiatives

Jason V. Silberstein
Executive Vice President,
Site Leasing

## COMMON STOCK TRADING SYMBOL

Class A shares of SBA Communications Corporation are traded on the NASDAQ Global Select Market under the symbol: SBAC

Mary S. Chan
Director

Duncan H. Cocroft
Director

George R. Krouse Jr.
Director

Jack Langer
Director

Brian M. Allen
Senior Vice President, Site Leasing

Donald E. Day
Senior Vice President, Services

Michelle Eisner
Senior Vice President and
Chief Human Resources Officer

Jorge Grau
Senior Vice President
and Chief Information Officer

Larry Harris
Senior Vice President,
U.S. Business Development

Brian D. Lazarus
Senior Vice President
and Chief Accounting Officer

David J. Porte
Senior Vice President,
International Strategy and
Business Development

Neil H. Seidman
Senior Vice President,
Mergers and Acquisitions

## INTERNET WEBSITE

www.sbasite.com

© 2019 SBA Communications Corporation. All Rights Reserved. The SBA logo, Your Signal Starts Here and Building Better Wireless are all registered trademarks owned by SBA Telecommunications, Inc. and affiliated SBA companies. Other brands and product names mentioned herein may be trademarks or registered trademarks of their respective companies.

## HEADQUARTERS

8051 Congress Avenue
Boca Raton, FL 33487-1307
T + 561.995.7670
T + 800.487.SITE (7483)

## REGIONAL OFFICES

North America
Montreal, Canada
Alpharetta, Georgia
Biddeford, Maine
Charlotte, North Carolina
Chicago, Illinois
Costa Mesa, California
Dallas, Texas
Fenton, Missouri
Indianapolis, Indiana
Nashville, Tennessee
Pelham, Alabama
Pittsburgh, Pennsylvania
Woodbridge, New Jersey

## Central America

Guatemala City, Guatemala
Managua, Nicaragua
Panama City, Panama
San Jose, Costa Rica
San Salvador, El Salvador
South America
Bogota, Colombia
Buenos Aires, Argentina
Lima, Peru
Quito, Ecuador
Santiago, Chile
Sao Paulo, Brazil

## AUDITORS

Ernst & Young LLP
5100 Town Center Circle
Suite 500
Boca Raton, FL 33486

## TRANSFER AGENT

Computershare Trust Company, N.A.
P.O. Box 43069
Providence, RI 02940-3069
www.computershare.com/equiserve

## INVESTOR RELATIONS

SBA Communications Corporation
8051 Congress Avenue
Boca Raton, FL 33487-1307
ir@sbasite.com

## NOTICE OF ANNUAL MEETING

The annual meeting of shareholders will be held at 10:00 AM (Eastern) on Thursday, May 16, 2019 at the corporate headquarters:
8051 Congress Avenue
Boca Raton, FL 33487-1307




8051 Congress Avenue, Boca Raton, FL 33487



800.487.SITE



www.sbasite.com



ir@sbasite.com