Document:

Supplemental Indenture No. 2

 Exhibit 4.1 
 AMERICAN TOWER CORPORATION 
 and 

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A. 
 as Trustee 
  

 
 SUPPLEMENTAL
INDENTURE NO. 2 
 Dated as of December 7, 2010 
 to 
 BASE INDENTURE 

Dated as of May 13, 2010 
 $1,000,000,000 Principal Amount 
 4.500% SENIOR NOTES
DUE 2018 

 TABLE OF CONTENTS 

 

							
	  	  	 	  	Page	 
		
	 Article I DEFINITIONS AND INCORPORATION BY REFERENCE
	  	 	1	  
			
	 Section 1.01.
	  	Definitions.	  	 	1	  
			
	 Section 1.02.
	  	Incorporation by Reference of Trust Indenture Act.	  	 	9	  
			
	 Section 1.03.
	  	Rules of Construction.	  	 	9	  
		
	 Article II THE SECURITIES
	  	 	10	  
			
	 Section 2.01.
	  	Form and Dating.	  	 	10	  
			
	 Section 2.02.
	  	Execution and Authentication of Securities.	  	 	10	  
			
	 Section 2.03.
	  	Registrar and Paying Agent.	  	 	10	  
			
	 Section 2.04.
	  	Paying Agent to Hold Money in Trust.	  	 	10	  
			
	 Section 2.05.
	  	Transfer and Exchange.	  	 	11	  
			
	 Section 2.06.
	  	Outstanding Securities	  	 	11	  
			
	 Section 2.07.
	  	Interest Payment and Record Dates.	  	 	11	  
			
	 Section 2.08.
	  	No Sinking Fund.	  	 	11	  
			
	 Section 2.09.
	  	Defaulted Interest.	  	 	11	  
			
	 Section 2.10.
	  	CUSIP and ISIN Numbers.	  	 	12	  
			
	 Section 2.11.
	  	Global Securities.	  	 	12	  
			
	 Section 2.12.
	  	Ranking.	  	 	12	  
			
	 Section 2.13.
	  	Additional Securities.	  	 	12	  
		
	 Article III OPTIONAL REDEMPTION; MANDATORY REDEMPTION
	  	 	13	  
			
	 Section 3.01.
	  	Notice to Trustee	  	 	13	  
			
	 Section 3.02.
	  	Optional Redemption.	  	 	13	  
			
	 Section 3.03.
	  	Mandatory Redemption.	  	 	13	  
		
	 Article IV COVENANTS
	  	 	13	  
			
	 Section 4.01.
	  	Additional Covenants.	  	 	13	  
		
	 Article V MISCELLANEOUS
	  	 	15	  
			
	 Section 5.01.
	  	Conflict of Any Provision of Indenture with Trust Indenture Act.	  	 	15	  
			
	 Section 5.02.
	  	Duplicate Originals.	  	 	15	  
			
	 Section 5.03.
	  	New York Law to Govern.	  	 	15	  
			
	 Section 5.04.
	  	No Adverse Interpretation of Other Agreements.	  	 	15	  
			
	 Section 5.05.
	  	Successors and Assigns of Company Bound by Supplemental Indenture.	  	 	15	  
			
	 Section 5.06.
	  	Severability.	  	 	15	  
			
	 Section 5.07.
	  	Effect of Headings.	  	 	15	  

 Exhibit A — Form of Global
Security 
 Exhibit B — Form of Legend for Global Security 

  
 i 

 SUPPLEMENTAL INDENTURE NO. 2 (the “Supplemental Indenture”), dated
as of December 7, 2010, between American Tower Corporation, a Delaware corporation (the “Company”), and The Bank of New York Mellon Trust Company, N.A., a national banking association, as trustee (the
“Trustee”). 
 WITNESSETH THAT: 
 WHEREAS, the Company and the Trustee have executed and delivered a base indenture, dated as of May 13, 2010 (as amended, supplemented or otherwise modified from time to time, the “Base
Indenture,” and, together with this Supplemental Indenture, as amended, supplemented or otherwise modified from time to time, the “Indenture”) to provide for the future issuance of the Company’s senior debt securities
to be issued from time to time in one or more series; and 
 WHEREAS, pursuant to the terms of the Base Indenture, the Company
desires to provide for the establishment of a series of its Securities, to be titled as its “4.500% Senior Notes due 2018,” the form and substance of such Securities and the terms, provisions and conditions thereof to be set forth as
provided in the Indenture; 
 NOW, THEREFORE: 
 Each party agrees as follows for the benefit of the other party and for the equal and ratable benefit of the Holders of the Securities. 

ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE 
 Section 1.01. DEFINITIONS. 
 Capitalized terms used
herein without definition shall have the respective meanings ascribed to them in the Base Indenture. The following definitions supplement, and, to the extent inconsistent with, replace the definitions in Article I of the Base Indenture:

 “Additional Security Board Resolution” means resolutions duly adopted by the Board of Directors of the
Company and delivered to the Trustee in an Officers’ Certificate providing for issuance of Additional Securities. 

“Additional Security Supplemental Indenture” means a supplement to this Indenture duly executed and delivered by the
Company and the Trustee pursuant to Article 7 of the Base Indenture. 
 “Additional Securities” means the
Company’s Securities originally issued hereunder after the Issue Date pursuant to Section 2.13 hereof, except for Securities authenticated and delivered upon registration of, transfer of, or in exchange for, or in lieu of other Securities
pursuant to Section 3.07, 3.09, 7.05 or 9.06 of the Base Indenture, or 4.01(b) hereof, as specified in the relevant Additional Security Board Resolutions or Additional Security Supplemental Indenture issued therefor in accordance with this
Indenture. 
 “Adjusted EBITDA” means, for the 12-month period preceding the calculation date, for the Company
and its Subsidiaries on a consolidated basis in accordance with GAAP, the sum of (a) Net Income, plus (b) to the extent deducted in determining Net Income, the sum of (i) Interest Expense, (ii) income tax expense, including,
without limitation, taxes paid or accrued based on income, profits or capital, including state, franchise and similar taxes and foreign withholding taxes, (iii) depreciation and amortization (including, without limitation, amortization of
goodwill and other intangible assets), (iv) extraordinary losses and non-recurring non-cash charges and expenses, (v) all other non-cash charges, expenses and interest (including, without limitation, any non-cash losses in respect of
Commodity Agreements, Currency Agreements or Interest Rate Agreements, non-cash impairment charges, non-cash valuation charges for stock option grants or vesting of restricted stock awards or any other non-cash compensation charges, and losses from
the early extinguishment of Indebtedness) and (vi) non-recurring charges and expenses, restructuring charges, transaction expenses (including, without limitation, transaction expenses incurred in connection with any merger or acquisition) and
underwriters’ fees or discounts, and severance and retention payments in connection with any merger or acquisition, in each case for such period, less extraordinary gains and cash payments (not otherwise deducted in determining net income) made
during such period with respect to 

 
non-cash charges that were added back in a prior period; provided, however, (I) with respect to any Person that became a Subsidiary, or was merged with or consolidated into the
Company or any Subsidiary, during such period, or any acquisition by the Company or any Subsidiary of the assets of any Person during such period, “Adjusted EBITDA” shall, at the option of the Company in respect of any or all of the
foregoing, also include the Adjusted EBITDA of such Person or attributable to such assets, as applicable, during such period as if such acquisition, merger or consolidation had occurred on the first day of such period and (II) with respect to any
Person that has ceased to be a Subsidiary during such period, or any material assets of the Company or any Subsidiary sold or otherwise disposed of by the Company or any Subsidiary during such period, “Adjusted EBITDA” shall exclude the
Adjusted EBITDA of such Person or attributable to such assets, as applicable, during such period as if such sale or disposition of such Subsidiary or such assets had occurred on the first day of such period. 

“Adjusted Treasury Rate” means, with respect to any redemption date: 

(1) the yield, under the heading which represents the average for the immediately preceding week, appearing in the most recently
published statistical release designated “H.15(519)” or any successor publication which is published weekly by the Board of Governors of the Federal Reserve System and which establishes yields on actively traded United States Treasury
securities adjusted to constant maturity under the caption “Treasury Constant Maturities,” for the maturity corresponding to the Comparable Treasury Issue (if no maturity is within three months before or after the Remaining Life, yields
for the two published maturities most closely corresponding to the Comparable Treasury Issue shall be determined and the Adjusted Treasury Rate shall be interpolated or extrapolated from such yields on a straight line basis, rounding to the nearest
month); or 
 (2) if such release (or any successor release) is not published during the week preceding the calculation date or
does not contain such yields, the rate per annum equal to the semi-annual equivalent yield to maturity of the Comparable Treasury Issue, calculated using a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount)
equal to the Comparable Treasury Price for such redemption date. 
 The Adjusted Treasury Rate shall be calculated on the third
Business Day preceding the redemption date. 
 “Beneficial Owner” has the meaning assigned to such term in Rule
13d-3 and Rule 13d-5 under the Exchange Act, except that in calculating the beneficial ownership of any particular “person” (as that term is used in Section 13(d)(3) of the Exchange Act), such “person” will be deemed to have
beneficial ownership of all securities that such “person” has the right to acquire by conversion or exercise of other securities, whether such right is currently exercisable or is exercisable only upon the occurrence of a subsequent
condition. The terms “Beneficially Owns” and “Beneficially Owned” have a corresponding meaning. 

“Capital Lease Obligation” means, at the time any determination is to be made, the amount of the liability in respect of
a capital lease that would at that time be required to be capitalized on a balance sheet in accordance with GAAP. 

“Capital Stock” means: 
 (1) in the case of a corporation, corporate stock; 
 (2) in the case of an
association or business entity, any and all shares, interests, participations, rights or other equivalents (however designated) of corporate stock; 
 (3) in the case of a partnership or limited liability company, partnership or membership interests (whether general or limited); and 

(4) any other interest or participation that confers on a Person the right to receive a share of the profits and losses of, or
distributions of assets of, the issuing Person. 
 “Change of Control” means the occurrence of any of the
following: 
 (1) the adoption of a plan relating to the liquidation or dissolution of the Company; 

  
 2 

 (2) any “person,” as such term is used in Section 13(d)(3) of the Exchange
Act, becomes the Beneficial Owner, directly or indirectly, of more than 50% of the voting power of the Voting Stock of the Company; provided that a transaction in which the Company becomes a Subsidiary of another Person shall not constitute a Change
of Control if (a) the stockholders of the Company immediately prior to such transaction Beneficially Own, directly or indirectly through one or more intermediaries, 50% or more of the voting power of the outstanding Voting Stock of such other
Person of whom the Company is a Subsidiary immediately following such transaction and (b) immediately following such transaction no person (as defined above) other than such other Person, Beneficially Owns, directly or indirectly, more than 50%
of the voting power of the Voting Stock of the Company; or 
 (3) the first day on which a majority of the members of the Board
of Directors of the Company are not Continuing Directors. 
 “Change of Control Offer” has the meaning set
forth in Section 4.01(b). 
 “Change of Control Payment” has the meaning set forth in
Section 4.01(b). 
 “Change of Control Payment Date” has the meaning set forth in Section 4.01(b).

 “Change of Control Triggering Event” means the occurrence of both a Change of Control and a Ratings Decline
(as defined below). 
 “Commodity Agreement” of any Person means any commodity forward contract, commodity swap
agreement, commodity option agreement or other similar agreement or arrangement to which such Person is a party. 

“Comparable Treasury Issue” means the United States Treasury security selected by an Independent Investment Banker (as
defined below) as having a maturity comparable to the remaining term of the Securities that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of
comparable maturity to the remaining term of the Securities (“Remaining Life”). 
 “Comparable Treasury
Price” means, for any redemption date, (1) the average of four Reference Treasury Dealer Quotations (as defined below) for such redemption date, after excluding the highest and lowest Reference Treasury Dealer Quotations, or
(2) if the Independent Investment Banker obtains fewer than four such Reference Treasury Dealer Quotations, the average of all such quotations. 
 “Continuing Directors” means a director who either was a member of the Company’s Board of Directors on the Issue Date or who becomes a member of the Company’s Board of Directors
subsequent to the Issue Date and whose appointment, election or nomination for election by the Company’s stockholders is duly approved by a majority of the Continuing Directors on the Company’s Board of Directors at the time of such
approval, either by specific vote or by approval of the proxy statement issued by the Company on behalf of the Company’s Board of Directors in which such individual is named as nominee for director. Solely for purposes of this definition, the
term “Board of Directors” shall be defined without regard to the words “or any authorized committee of the Board of Directors of such Person or any officer of such Person duly authorized by the Board of Directors of such Person to
take a specific action” in such definition. 
 “Currency Agreement” of any Person means any foreign
exchange contract, currency swap agreement or other similar agreement or arrangement as to which such Person is a party. 

“Default” means any event which is, or after notice or passage of time or both would be, an Event of Default.

 “Disqualified Stock” means any Capital Stock that, by its terms (or by the terms of any security into which
it is convertible, or for which it is exchangeable, in each case at the option of the holder of the Capital Stock), or upon the happening of any event, matures or is mandatorily redeemable, pursuant to a sinking fund obligation or otherwise, or
redeemable at the option of the holder of the Capital Stock, in whole or in part, on or prior to the Stated Maturity of the Securities. 

  
 3 

 “DTC” means The Depository Trust Company, its nominees and successors.

 “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations of the
SEC promulgated thereunder. 
 “Existing SpectraSite Indebtedness” means that certain mortgage loan more fully
described in the Offering Memorandum dated April 27, 2007 regarding the $1,750,000,000 American Tower Trust I Commercial Mortgage Pass-Through Certificates, Series 2007-1. 

“Fair Market Value” means, with respect to any asset, the price that (after taking into account any liabilities relating
to such asset) would be paid in an arm’s-length transaction between an informed and willing seller under no compulsion to sell and an informed and willing buyer under no compulsion to buy, as determined in good faith by the Board of Directors,
whose determination shall be conclusive if evidenced by a Board Resolution. 
 “Fitch” means Fitch, Inc. or any
successor to the rating agency business thereof. 
 “Foreign Subsidiary” means, with respect to any Person,
(a) any Subsidiary of such Person that is not organized or existing under the laws of, and whose principal business is conducted outside of, the United States, any state thereof, the District of Columbia, or any territory thereof (for purposes
of this definition only, the “United States”), or (b) any Subsidiary of such Person that is organized or existing under the laws of the United States whose only material assets are the Capital Stock of Foreign Subsidiaries meeting
clause (a) of this definition. 
 “GAAP” means generally accepted accounting principles set forth in the
standards, statements and pronouncements of the Financial Accounting Standards Board, or in such other statements by such other entity as may be approved by a significant segment of the accounting profession of the United States, which are in effect
on the Issue Date. 
 “Guarantee” means a guarantee (other than by endorsement of negotiable instruments for
collection in the ordinary course of business), direct or indirect, in any manner (including, without limitation, by way of a pledge of assets or through letters of credit or reimbursement agreements in respect thereof), of all or any part of any
Indebtedness. The term “Guarantee” used as a verb has a corresponding meaning. 
 “Indebtedness”
means, with respect to any specified Person, any indebtedness of such Person, whether or not contingent: 
 (1) in respect of
borrowed money; 
 (2) evidenced by bonds, notes, debentures or similar instruments or letters of credit (or reimbursement
agreements in respect thereof); 
 (3) in respect of banker’s acceptances; 

(4) representing Capital Lease Obligations; 
 (5) representing the balance deferred and unpaid of the purchase price of any property, except any such balance that constitutes an accrued expense or trade payable; 

(6) representing obligations under any Interest Rate Agreements, Commodity Agreements and Currency Agreements except for those entered
into for the purpose of fixing, hedging or swapping interest rate, commodity price or foreign currency exchange risk; or 

  
 4 

 (7) in respect of all Disqualified Stock issued by such Person with the amount of
Indebtedness represented by such Disqualified Stock being equal to the greater of its voluntary or involuntary liquidation preference and its maximum fixed repurchase price, but excluding accrued dividends, if any; provided that (a) if the
Disqualified Stock does not have a fixed repurchase price, such maximum fixed repurchase price shall be calculated in accordance with the terms of the Disqualified Stock as if the Disqualified Stock were purchased on any date on which Indebtedness
shall be required to be determined pursuant to the applicable indenture, and (b) if the maximum fixed repurchase price is based upon, or measured by, the fair market value of the Disqualified Stock, the fair market value shall be the Fair
Market Value thereof; 
 if and to the extent any of the preceding items (other than letters of credit and obligations under
Interest Rate Agreements, Commodity Agreements and Currency Agreements) would appear as a liability upon a balance sheet of such Person prepared in accordance with GAAP. In addition, the term “Indebtedness” includes all Indebtedness of
others secured by a Lien on any asset of such Person whether or not such Indebtedness is assumed by such Person (the amount of such Indebtedness as of any date being deemed to be the lesser of the Fair Market Value of such property or assets as of
such date or the principal amount of such Indebtedness of such other Person so secured) and, to the extent not otherwise included, the Guarantee by such Person of any Indebtedness of any other Person. 

The amount of any Indebtedness outstanding as of any date shall be: 

(1) the accreted value of the Indebtedness, in the case of any Indebtedness issued with original issue discount; and 

(2) the principal amount of the Indebtedness, together with any interest on the Indebtedness that is more than 30 days past due, in the
case of any other Indebtedness. 
 “Independent Investment Banker” means one of the Reference Treasury Dealers
appointed by the Company. 
 “Interest Expense” means, for any period, all cash interest expense (including
imputed interest with respect to Capital Lease Obligations and commitment fees) with respect to any Indebtedness of the Company and of its Subsidiaries’ Indebtedness on a consolidated basis during such period pursuant to the terms of such
Indebtedness. 
 “Interest Rate Agreement” of any Person means any interest rate protection agreement, interest
rate future agreement, interest rate option agreement, interest rate swap agreement, interest rate cap agreement, interest rate collar agreement, interest rate hedge agreement, option or future contract or other similar agreement or arrangement as
to which such Person is a party. 
 “Investment Grade Rating” means a rating equal to or greater than BBB- by
S&P and Fitch and Baa3 by Moody’s or the equivalent thereof under any new ratings system if the ratings system of any such agency shall be modified after the date hereof, or the equivalent rating or any other Ratings Agency selected by the
Company as provided in the definition of Ratings Agency. 
 “Issue Date” means December 7, 2010.

 “Licenses” means, collectively, any telephone, microwave, radio transmissions, personal communications or
other license, authorization, certificate of compliance, franchise, approval or permit, whether for the construction, ownership or operation of any communications tower facilities, granted or issued by the Federal Communications Commission (or other
similar or successor agency of the federal government administering the Communications Act of 1934 or any similar or successor federal statute) and held by the Company or any of its Subsidiaries. 

“Lien” means, with respect to any property or assets, including Capital Stock, any mortgage, lien, pledge, charge,
security interest or encumbrance of any kind in respect of such asset, whether or not filed, recorded or otherwise perfected under applicable law (including any conditional sale or other title retention agreement, any lease in the nature thereof,
any option or other agreement to sell or give a security interest in and any filing of or agreement to give any financing statement under the Uniform Commercial Code (or equivalent statutes) of any jurisdiction). 

  
 5 

 “Moody’s” means Moody’s Investors Services, Inc. or any successor
to the rating agency business thereof. 
 “Net Income” means, for any period of determination, net income
(loss) of the Company and its Subsidiaries, on a consolidated basis, determined in accordance with GAAP. 
 “Newly
Created Subsidiary” means a newly created direct or indirect Subsidiary of the Company that is formed or organized after the Issue Date; provided that neither the Company nor any Subsidiary of the Company shall have transferred, or may in
the future transfer, any assets (other than cash or cash equivalents) to such Newly Created Subsidiary for so long as such Newly Created Subsidiary remains designated as an Unrestricted Subsidiary. 

“Original Securities” has the meaning set forth in Section 2.02. 

“Paying Agent” has the meaning set forth in Section 2.03. 

“Permitted Amount” means, on any date, an amount equal to 3.5 times Adjusted EBITDA as of the most recent fiscal quarter
for which financial statements of the Company are internally available immediately preceding such date. 
 “Permitted
Liens” means: 
 (1) Liens in favor of the Company or its Subsidiaries; 

(2) Liens existing on the Issue Date (other than those securing Existing SpectraSite Indebtedness) and renewals and replacements thereof;

 (3) Liens for taxes, assessments or governmental charges or claims that are not yet delinquent or that are being contested in
good faith by appropriate proceedings promptly instituted and diligently conducted; provided that any reserve or other appropriate provision as shall be required in conformity with GAAP shall have been made therefor; 

(4) Liens of carriers, warehousemen, mechanics, vendors (solely to the extent arising by operation of law), laborers and materialmen
incurred in the ordinary course of business for sums not yet due or being diligently contested in good faith, if reserves or appropriate provisions shall have been made therefor; 

(5) Liens incurred in the ordinary course of business in connection with worker’s compensation and unemployment insurance, social
security obligations, assessments or government charges which are not overdue for more than 60 days; 
 (6) restrictions on the
transfer of Licenses or assets of the Company or any of its Subsidiaries imposed by any of the Licenses as in effect on the Issue Date or imposed by the Communications Act of 1934, any similar or successor federal statute or the rules and
regulations of the Federal Communications Commission (or other similar or successor agency of the federal government administering such Act or successor statute) thereunder, all as the same may be in effect from time to time; 

(7) Liens arising by operation of law in favor of purchasers in connection with the sale of an asset; provided, however, that such Lien
only encumbers the property being sold; 
 (8) Liens to secure performance of statutory obligations, surety or appeal bonds,
performance bonds, bids or tenders; 
 (9) judgment Liens; 

  
 6 

 (10) Liens in connection with escrow or security deposits made in connection with any
acquisition of assets; 
 (11) Liens securing Indebtedness since the Issue Date represented by Capital Lease Obligations,
mortgage financings or purchase money obligations, in each case incurred for the purpose of financing all or any part of the purchase price or cost of construction or improvement of property, plant or equipment used in any business of the Company or
any Subsidiary of the Company in an aggregate principal amount, including all Indebtedness incurred to refund, refinance or replace any other Indebtedness incurred pursuant to this clause (11), not to exceed $500.0 million at any time outstanding
for the Company and any Subsidiaries of the Company; 
 (12) Liens securing obligations under Interest Rate Agreements,
Commodity Agreements and Currency Agreements not for speculative purposes; 
 (13) easements, rights-of-way, zoning
restrictions, licenses or restrictions on use and other similar encumbrances on the use of real property that: 
 (a) are not
incurred in connection with the borrowing of money or the obtaining of advances or credit (other than trade credit in the ordinary course of business); and 
 (b) do not in the aggregate materially detract from the value of the property or materially impair the use thereof in the operation of business by the Company and its Subsidiaries; 

(14) Liens on property of the Company or a Subsidiary of the Company at the time the Company or such Subsidiary acquired the property,
including acquisition by means of a merger or consolidation with or into the Company or any Subsidiary, or an acquisition of assets, and any replacement thereof, provided, however, that such Liens are not created, incurred or assumed in connection
with or in contemplation of such acquisition, and provided further that such Liens may not extend to any other property owned by the Company or any Subsidiary of the Company; 
 (15) leases and subleases of real property in the ordinary course of business (for the avoidance of doubt, excluding sale and lease-back transactions) which do not materially interfere with the ordinary
conduct of the business; and 
 (16) banker’s Liens, rights of set-off or similar rights and remedies as to deposit
accounts or other funds maintained with a depositary institution; provided that: 
 (a) such deposit account is
not a dedicated cash collateral account and is not subject to restrictions against access in excess of those set forth by regulations promulgated by the Federal Reserve Board or other applicable law; and 

(b) such deposit account is not intended to provide collateral to the depositary institution. 

“Person” or “person” means any individual, corporation, partnership, limited liability company, joint
venture, association, joint-stock company, trust, estate, unincorporated organization or government or other agency or political subdivision thereof or any other entity. 
 “Ratings Agencies” means (1) S&P, Moody’s and Fitch; and (2) if any of S&P, Moody’s and Fitch ceases to rate the Securities or ceases to make a rating on the
Securities publicly available, an entity registered as a “nationally recognized statistical rating organization” (registered as such pursuant to Rule 17g-1 of the Exchange Act) then making a rating on the Securities publicly available
selected by the Company (as certified by an Officers’ Certificate), which shall be substituted for S&P, Moody’s or Fitch, as the case may be. 
 “Ratings Decline” means the occurrence of the following on, or within 90 days after, the date of the public notice of the occurrence of a Change of Control or of the intention by the
Company or any third-party to effect a Change of Control (which period shall be extended for so long as the rating of the securities is under publicly 

  
 7 

 
announced consideration for possible downgrade by any of the Ratings Agencies if such period exceeds 90 days): (1) in the event that the Securities have an Investment Grade Rating by all
three Ratings Agencies, the Securities cease to have an Investment Grade Rating by two of the three Rating Agencies, (2) in the event that the Securities have an Investment Grade Rating by only two Ratings Agencies, the Securities cease to have
an Investment Grade Rating by both such Rating Agencies, or (3) in the event that the Securities do not have an Investment Grade Rating, the rating of the Securities by two of the three Ratings Agencies (or if there are less than three Rating
Agencies rating the securities, the rating of each Rating Agency) decreases by one or more gradations (including gradations within ratings categories as well as between rating categories) or is withdrawn. 

“Reference Treasury Dealer” means any of the primary U.S. Government securities dealers in New York City. 

“Reference Treasury Dealer Quotations” means, with respect to each Reference Treasury Dealer and any redemption date,
the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Independent Investment Banker at
5:00 p.m., New York City time, on the third Business Day preceding such redemption date. 
 “Registrar” has the
meaning set forth in Section 2.03. 
 “S&P” means Standard & Poor Rating Services, a division
of The McGraw-Hill Companies, Inc., or any successor to the rating agency business thereof. 
 “SEC” means the
Securities and Exchange Commission. 
 “Securities” means the 4.500% Senior Notes due 2018 established by this
Supplemental Indenture and issued by the Company pursuant to the Indenture. 
 “Securities Act” means the
Securities Act of 1933, as amended, and the rules and regulations of the SEC promulgated thereunder. 
 “Securities
Agent” means any Registrar, Paying Agent, or co-Registrar or co-agent. 
 “Stated Maturity” means,
with respect to the payment of principal on the Securities, January 15, 2018. 
 “Subsidiary” means, with
respect to any Person, (1) any corporation, limited liability company, association or other business entity of which more than 50% of the voting power of the outstanding Voting Stock is owned, directly or indirectly, by such Person and one or
more other Subsidiaries of such Person or (2) any partnership (A) the sole general partner or the managing general partner of which is such Person or a Subsidiary of such Person or (B) the only general partners of which are such
Person or one or more Subsidiaries of such Person (or any combination thereof). The term “Subsidiary” with respect to the Company shall not include any Unrestricted Subsidiary. 

“TIA” means the Trust Indenture Act of 1939 (15 U.S. Code §§ 77aaa-77bbbb) as amended and in effect from time
to time. 
 “Unrestricted Subsidiary” means (a) any Foreign Subsidiary or Newly Created Subsidiary of the
Company that is designated by the Board of Directors as an Unrestricted Subsidiary until such time as the Board of Directors may designate it to be a Subsidiary, provided that no Default or Event of Default would occur or be existing following such
designation, and (b) any subsidiary of an Unrestricted Subsidiary. Any such designation by the Board of Directors shall be evidenced to the Trustee by filing a Board Resolution with the Trustee giving effect to such designation. At the time of
designation of an Unrestricted Subsidiary as a Subsidiary, such Subsidiary shall be deemed to incur outstanding Indebtedness and grant any existing Liens. 

  
 8 

 “Voting Stock” of any Person as of any date means the Capital Stock of such
Person that is normally entitled to vote in the election of the board of directors, managers or trustees of such Person. 

Section 1.02. INCORPORATION BY REFERENCE OF TRUST
INDENTURE ACT. 
 Whenever this Indenture refers to a provision of the TIA, the provision is
incorporated by reference in and made a part of this Indenture. 
 The following TIA terms used in this Indenture have the
following meanings: 
 “Commission” means the SEC; 

“indenture securities” means the Securities; 
 “indenture security holder” means a Securityholder or a Holder; 

“indenture to be qualified” means this Indenture; and 

“obligor” on the indenture securities means the Company or any successor. 

All other terms used in this Indenture that are defined by the TIA, defined by the TIA by reference to another statute or defined by SEC
rule under the TIA and not otherwise defined herein have the meanings so assigned to them. 
 Section 1.03. RULES
OF CONSTRUCTION. 
 Unless the context otherwise requires: 

(i) a term has the meaning assigned to it; 

(ii) an accounting term not otherwise defined has the meaning assigned to it in accordance with generally accepted
accounting principles in effect from time to time; 
 (iii) “or” is not exclusive; 

(iv) “including” means “including without limitation”; 

(v) words in the singular include the plural and in the plural include the singular; 

(vi) provisions apply to successive events and transactions; 

(vii) “herein,” “hereof” and other words of similar import refer to this Indenture as a whole and not
to any particular Article, Section or other subdivision of this Indenture; and 
 (viii) references to currency
shall mean the lawful currency of the United States of America, unless the context requires otherwise. 
 In addition, to the
extent that the terms of this Supplemental Indenture are inconsistent or conflict with the terms of the Base Indenture, then, for purposes of the Securities, the terms of this Supplemental Indenture shall apply to the extent of such inconsistency or
conflict. 

  
 9 

 ARTICLE II THE SECURITIES 
 Section 2.01. FORM AND DATING. 
 The Securities and the Trustee’s certificate of authentication shall be substantially in the form set forth in Exhibit A, which is incorporated in and forms a part of this Indenture. The
Securities may have notations, legends or endorsements required by law, stock exchange rule or usage. Each Security shall be dated the date of its authentication. 
 The Securities shall be issued initially in the form of one or more Global Securities, substantially in the form set forth in Exhibit A, deposited with the Trustee, as custodian for DTC (who shall be
the initial Depositary with respect to the Securities), duly executed by the Company and authenticated by the Trustee and bearing the legend set forth in Exhibit B. The aggregate principal amount of the Global Security may from time to time be
increased or decreased by adjustments made on the records of the Trustee, as custodian for the Depository, as hereinafter provided; provided, that, except as permitted by Section 2.13, in no event shall the aggregate principal amount of
the Global Security or Global Securities exceed $1,000,000,000. 
 Securities in the form of Physical Securities issued in
exchange for Securities represented by interests in a Global Security pursuant to Section 3.08 of the Base Indenture may be issued in the form of permanent certificated Securities in registered form in substantially the form set forth in
Exhibit A and, if applicable, bearing any legends required hereby. 
 The Securities shall be denominated in Dollars, and
all cash payments due thereon shall be made in Dollars. The Securities shall be issuable only in registered form without interest coupons and only in denominations of $2,000 principal amount and integral multiples of $1,000 in excess thereof.

 Section 2.02. EXECUTION AND AUTHENTICATION OF SECURITIES.

 Upon a Company Order, the Trustee shall authenticate Securities for original issue in the aggregate principal amount of
$1,000,000,000 (the “Original Securities”). 
 Section 2.03. REGISTRAR AND
PAYING AGENT. 
 The Company shall maintain an office or agency where Securities may be
presented for registration of transfer or for exchange (“Registrar”) and an office or agency where Securities may be presented for payment (“Paying Agent”). The Corporate Trust Office shall serve as the office or
agency for the aforementioned purposes. The Registrar shall keep a register of the Securities and of their transfer and exchange. The Company may appoint or change one or more co-Registrars, one or more additional paying agents upon reasonable prior
written notice to the Trustee and may act in any such capacity on its own behalf. The term “Registrar” includes any co-Registrar and the term “Paying Agent” includes any additional paying agent. 

The Company shall enter into an appropriate agency agreement with any Securities Agent not a party to this Indenture. The agreement shall
implement the provisions of this Indenture that relate to such Securities Agent. The Company shall notify the Trustee in writing of the name and address of any Securities Agent not a party to this Indenture. If the Company fails to maintain a
Registrar or Paying Agent, the Trustee shall act as such. 
 The Company initially appoints the Trustee as Paying Agent and
Registrar. 
 For purposes of the Securities, the Payment Office shall be the Corporate Trust Office. 

Section 2.04. PAYING AGENT TO HOLD MONEY IN
TRUST. 
 Each Paying Agent shall hold in trust for the benefit of the Securityholders or the Trustee all
moneys held by the Paying Agent for the payment of the Securities, and shall notify the Trustee in writing of any Default by the Company in making any such payment. While any such Default continues, the Trustee may require a Paying Agent

  
 10 

 
to pay all money held by it to the Trustee. The Company at any time may require a Paying Agent to pay all money held by it to the Trustee. Upon payment over to the Trustee, the Paying Agent shall
have no further liability for such money. If the Company acts as Paying Agent, it shall segregate and hold as a separate trust fund all money held by it as Paying Agent. 
 Section 2.05. TRANSFER AND EXCHANGE. 
 The Company or the Trustee, as the case may be, shall not be required to register the transfer of or exchange any Security selected for redemption in whole or in part, in accordance with this Indenture,
except the unredeemed portion of Securities being redeemed in part. 
 No service charge shall be made for any transfer or
exchange of Securities, but the Company may require payment of a sum sufficient to cover any transfer tax or similar governmental charge that may be imposed in connection with any transfer or exchange of Securities, other than exchanges pursuant to
Section 3.11 or Section 7.05 of the Base Indenture or Section 4.01(b) or Article III, not involving any transfer. 

Section 2.06. OUTSTANDING SECURITIES 
 The Securities outstanding at any time are all the Securities authenticated by the Trustee except for those canceled by it, those delivered to it for cancellation, those reductions in the interest in a
Global Security effected by the Trustee in accordance with the provisions hereof, and those described in this Section and the Base Indenture as not outstanding. Except as set forth in Section 3.13 of the Base Indenture, a Security does not
cease to be outstanding because the Company or an affiliate of the Company holds the Security. 
 If a Security is replaced
pursuant to Section 3.09 of the Base Indenture, it ceases to be outstanding unless the Trustee receives proof satisfactory to it that the replaced Security is held by a bona fide purchaser. 

If the principal amount of any Security is considered paid under Section 4.01 of the Base Indenture, it ceases to be outstanding and
interest on it ceases to accrue. 
 If the Paying Agent (other than the Company, a Subsidiary or an affiliate of any thereof)
holds, on a redemption date or maturity date, money sufficient to pay Securities payable on that date, then on and after that date such Securities shall be deemed to be no longer outstanding and shall cease to accrue interest. 

Section 2.07. INTEREST PAYMENT AND RECORD DATES. 

The Interest Payment Dates for the Securities shall be January 15 and July 15 of each calendar year, beginning with, and
including, July 15, 2011. The Regular Record Date for an Interest Payment Date that falls on January 15 shall be the immediately preceding January 1, and the Regular Record Date for an Interest Payment Date that falls on July 15
shall be the immediately preceding July 1. 
 Section 2.08. NO SINKING FUND.

 There shall be no sinking fund with respect to the Securities. 
 Section 2.09. DEFAULTED INTEREST. 
 If
and to the extent the Company defaults in a payment of interest on the Securities, the Company shall pay in cash the defaulted interest in any lawful manner plus, to the extent not prohibited by applicable statute or case law, interest on such
defaulted interest at the rate provided in the Securities and in this Section 2.09. The Company may pay the defaulted interest (plus interest on such defaulted interest) to the persons who are Securityholders on a subsequent record date as
provided in Section 3.05(c) of the Base Indenture. 
 The Company shall pay interest (including post-petition interest in
any proceeding under any Bankruptcy Law) on overdue principal on the Securities at the rate equal to 1% per annum in excess of the then applicable 

  
 11 

 
interest rate on the Securities of that series to the extent lawful; it shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue installments of
interest (without regard to any applicable grace period) on the Securities of any series at the same rate to the extent lawful. 

Section 2.10. CUSIP AND ISIN NUMBERS. 
 The Company in issuing the Securities may use one or more CUSIP and ISIN numbers, and, if so, the Trustee shall use the CUSIP and ISIN numbers in notices of repurchase or exchange as a convenience to
Holders; provided, however, that no representation is hereby deemed to be made by the Trustee as to the correctness or accuracy of the CUSIP and ISIN numbers printed on the notice or on the Securities; provided further, that
reliance may be placed only on the other identification numbers printed on the Securities, and the effectiveness of any such notice shall not be affected by any defect in, or omission of, such CUSIP and ISIN numbers. The Company shall promptly
notify the Trustee of any change in the CUSIP and ISIN numbers. 
 Section 2.11. GLOBAL SECURITIES.

 The Securities shall initially be issued in the form of one of more Global Securities, and the provisions of the Base
Indenture (including, but not limited to, Section 3.06 and Section 3.08) relating to Global Securities shall apply to the Securities. 

Section 2.12. RANKING. 
 The indebtedness of the Company arising under or in connection with this Indenture and every outstanding Security issued under this Indenture from time to time constitutes and will constitute a senior
unsecured obligation of the Company, ranking pari passu in right of payment with each other and with all other existing and future senior unsecured obligations of the Company. Unless the context otherwise requires, the Securities shall be
considered collectively to be a single class for all purposes of this Indenture, including without limitation waivers, amendments, redemptions and Change of Control Offers. 
 Section 2.13. ADDITIONAL SECURITIES. 

The Company may, from time to time, subject to compliance with any other applicable provisions of this Indenture, without the consent of
the Holders, create and issue pursuant to this Indenture additional securities (“Additional Securities”) having terms and conditions identical to those of the Securities, except that Additional Securities: 

(i) may have a different issue date from the Securities; 
 (ii) may have a different amount of interest payable on the first Interest Payment Date after issuance than is payable on other Securities; and 

(iii) may have terms specified in the Additional Securities Board Resolution or Additional Securities Supplemental Indenture for such
Additional Securities making appropriate adjustments to Article II and Exhibit A (and related definitions) applicable to such Additional Securities in order to conform to and ensure compliance with the Securities Act (or other applicable securities
laws) and any other agreement applicable to such Additional Securities, which are not adverse in any material respect to the Holder of any Securities (other than such Additional Securities); 

provided, that no adjustment pursuant to this Section 2.13 shall cause such Additional Securities to constitute, as
determined pursuant to an Opinion of Counsel, a different class of securities than the Original Securities for U.S. federal income tax purposes. The Original Securities and any Additional Securities would rank equally and ratably and would be
treated as a single series of debt securities for all purposes under the Indenture. 

  
 12 

 ARTICLE III OPTIONAL REDEMPTION; MANDATORY REDEMPTION 

Section 3.01. NOTICE TO TRUSTEE 

If the Company elects to redeem Securities pursuant to the optional redemption provisions of Section 3.02 hereof, it shall furnish to
the Trustee, at least 30 days but not more than 60 days before a redemption date, an Officers’ Certificate setting forth (1) the redemption date, (2) the principal amount of Securities to be redeemed and (3) the redemption price
(expressed as a percentage of the principal amount). 
 Section 3.02. OPTIONAL REDEMPTION. 

(a) The Securities are redeemable at the Company’s election, in whole or in part, at any time at a redemption price equal to the
greater of: 
 (1) 100% of the principal amount of the Securities to be redeemed then outstanding; and

 (2) as determined by an Independent Investment Banker, the sum of the present values of the remaining
scheduled payments of principal and interest on the securities to be redeemed (not including any portion of such payments of interest accrued to the date of redemption) discounted to the redemption date on a semiannual basis (assuming a 360-day year
consisting of twelve 30-day months) at the Adjusted Treasury Rate for such securities, plus 40 basis points; 
 plus, in either of the above
cases, accrued and unpaid interest to the date of redemption on the securities to be redeemed. 
 If the optional redemption
date is on or after a Regular Record Date and on or before the related Interest Payment Date, the accrued and unpaid interest, if any, will be paid to the person in whose name the security is registered at the close of business on such Regular
Record Date. 
 (b) Any redemption pursuant to this Section 3.02 shall be made pursuant to Section 3.01 hereof and the
provisions of Article 9 of the Base Indenture. 
 Section 3.03. MANDATORY REDEMPTION. 

The Company shall not be required to make mandatory redemption or sinking fund payments with respect to the Securities. 

ARTICLE IV COVENANTS 

Section 4.01. ADDITIONAL COVENANTS. 
 In addition to those Covenants set forth in Article 4 of the Base Indenture, the Company shall comply with following covenants: 
 (a) Limitation on Liens. 
 The Company shall not, and shall not permit any
of its Subsidiaries to, allow any Lien on any of the Company’s or its Subsidiaries’ property or assets (which includes Capital Stock) securing Indebtedness, unless the Lien secures the Securities equally and ratably with, or prior to, any
other Indebtedness secured by such Lien, so long as such other Indebtedness is so secured, other than Permitted Liens. 

Notwithstanding the foregoing, the Company may, and may permit any of its Subsidiaries to, incur Liens securing Indebtedness without
equally and ratably securing the Securities if, after giving effect to the incurrence of such Liens, the aggregate amount (without duplication) of the Indebtedness secured by Liens (other than Permitted Liens) on the property or assets (which
includes Capital Stock) of the Company and its Subsidiaries shall not exceed 

  
 13 

 
the Permitted Amount at the time of the incurrence of such Liens (it being understood that Liens securing Existing SpectraSite Indebtedness shall be deemed to be incurred pursuant to this
paragraph). For the avoidance of doubt, “incur” means to create, incur, issue, assume, guarantee or otherwise become directly liable, contingently or otherwise. 
 (b) Repurchase of the Securities Upon a Change of Control Triggering Event. 

Upon the occurrence of a Change of Control Triggering Event, each Holder of Securities shall have the right to require the Company to
repurchase all or any part, equal to $2,000 or an integral multiple of $1,000 thereafter, of that Holder’s Securities pursuant to an offer (the “Change of Control Offer”) on the terms set forth in this Indenture at an offer
price in cash equal to 101% of the aggregate principal amount of Securities repurchased plus accrued and unpaid interest on the Securities up to but excluding the applicable date of repurchase (the “Change of Control Payment”).
Within 30 days following any Change of Control Triggering Event, if the Company had not, prior to the Change of Control Triggering Event, sent a redemption notice for all the Securities in connection with an optional redemption permitted by
Section 3.02 hereof, the Company shall mail or caused to be mailed a notice to each registered Holder briefly describing the transaction or transactions that constitute a Change of Control Triggering Event and offering to repurchase Securities
on the date specified in such notice (the “Change of Control Payment Date”), which date shall be no earlier than 30 days and no later than 60 days from the date the notice is mailed, pursuant to the procedures required by this
Indenture and described in such notice. 
 The Company shall comply with the requirements of Rule 14e-1 under the Exchange Act
and any other securities laws and regulations thereunder to the extent such laws and regulations are applicable to any Change of Control Offer. To the extent that the provisions of any securities laws or regulations conflict with the provisions of
this Section 4.01(b), the Company shall comply with the applicable securities laws and regulations and will not be deemed to have breached its obligations under the provisions of this Section 4.01(b) by virtue of such conflict. 

On the Change of Control Payment Date, the Company shall, to the extent lawful: 

(1) accept for payment all Securities or portions thereof properly tendered pursuant to the Change of Control Offer;

 (2) deposit with the Paying Agent an amount equal to the Change of Control Payment in respect of all
Securities or portions thereof properly tendered; and 
 (3) deliver or cause to be delivered to the Trustee the
Securities so accepted together with an Officers’ Certificate stating the aggregate principal amount of Securities or portions thereof being purchased by the Company. 
 The Paying Agent will promptly mail to each registered Holder of Securities so tendered the Change of Control Payment for such Securities, and the Trustee will promptly authenticate and mail (at the
Company’s expense), or cause to be transferred by book entry, to each Holder a new Security equal in principal amount to any unpurchased portion of the Securities surrendered, if any; provided that each such new Security shall be in a
principal amount of $2,000 or an integral multiple of $1,000 thereafter. Any Security so accepted for payment shall cease to accrue interest on and after the Change of Control Payment Date. 

This Section 4.01(b) shall be applicable, except as described in this Section 4.01(b), regardless of whether or not any other
provisions of this Indenture are applicable. 
 Notwithstanding the foregoing, the Company shall not be required to make a
Change of Control Offer upon a Change of Control Triggering Event if a third party makes the Change of Control Offer in the manner, at the times and otherwise in compliance with the requirements set forth in this Section 4.01(b) applicable to a
Change of Control Offer made by the Company and purchases all Securities properly tendered and not withdrawn under the Change of Control Offer. 

  
 14 

 The Company may make a Change of Control Offer in advance of a Change of Control Triggering
Event, and conditional upon the occurrence of such Change of Control Triggering Event, if a definitive agreement is in place for the Change of Control Triggering Event at the time of making the Change of Control Offer. 

ARTICLE V MISCELLANEOUS 

Section 5.01. CONFLICT OF ANY PROVISION OF INDENTURE
WITH TRUST INDENTURE ACT. 
 If and to the extent that any
provision of this Supplemental Indenture limits, qualifies or conflicts with another provision included in this Supplemental Indenture by operation of Sections 310 to 317, inclusive, of the Trust Indenture Act (an “incorporated
provision”), such incorporated provision shall control. 
 Section 5.02. DUPLICATE ORIGINALS.

 The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all
of them together represent the same agreement. Delivery of an executed counterpart by facsimile shall be effective as delivery of a manually executed counterpart thereof. 
 Section 5.03. NEW YORK LAW TO GOVERN. 
 THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE AND THE SECURITIES WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE
EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY. 
 Section 5.04. NO
ADVERSE INTERPRETATION OF OTHER AGREEMENTS. 

This Supplemental Indenture and the Base Indenture may not be used to interpret another indenture, loan or debt agreement of the Company
or its Subsidiaries or of any other Person. Any such indenture, loan or debt agreement may not be used to interpret this Supplemental Indenture or the Base Indenture. 
 Section 5.05. SUCCESSORS AND ASSIGNS OF COMPANY BOUND BY SUPPLEMENTAL
INDENTURE. 
 All the covenants, stipulations, promises and agreements in this Supplemental Indenture
contained by or in behalf of the Company shall bind their successors and assigns, whether so expressed or not. All the covenants, stipulations, promises and agreements in this Supplemental Indenture contained by or in behalf of the Trustee shall
bind their successors and assigns, whether so expressed or not. 
 Section 5.06. SEVERABILITY. 

If any provision of this Supplemental shall be held to be invalid, illegal or unenforceable under applicable law, then the remaining
provisions hereof shall be construed as though such invalid, illegal or unenforceable provision were not contained herein. 

Section 5.07. EFFECT OF HEADINGS. 

The Article and Section headings in this Supplemental Indenture and the Table of Contents are for convenience only and shall not affect
the construction hereof. 
 [The Remainder of This Page Intentionally Left Blank; Signature Page Follows]

  
 15 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be
duly executed as of the date first above written. 
  

			
	AMERICAN TOWER CORPORATION
		
	By:	 	 /s/ Edmund DiSanto

	Name:	 	Edmund DiSanto
	Title:	 	 Executive Vice President, Chief Administrative Officer, General Counsel
 and Secretary

	
	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., AS TRUSTEE
		
	By:	 	 /s/ Raymond K. O’Neil

	Name:	 	Raymond K. O’Neil
	Title:	 	Senior Associate

 EXHIBIT A 

[Face of Security] 
 AMERICAN TOWER CORPORATION 
 Certificate No.
             
 [INSERT GLOBAL SECURITY LEGEND AS REQUIRED]

 4.500% Senior Notes due 2018 
 CUSIP No.              
 ISIN No.              
 American Tower Corporation, a Delaware corporation (the “Company”), for value received, hereby promises to pay to Cede & Co., or its registered assigns, the principal sum of
                          dollars
($            ) on January 15, 2018 and to pay interest thereon, as provided on the reverse hereof, until the principal and any unpaid and accrued interest are paid or
duly provided for. 
 Interest Payment Dates: January 15 and July 15, with the first payment to be made on
July 15, 2011. 
 Regular Record Dates: January 1 and July 1. 

The provisions on the back of this certificate are incorporated as if set forth on the face hereof. 

  
 A-1

 IN WITNESS WHEREOF, American Tower Corporation has caused this instrument to be duly
signed. 
  

			
	AMERICAN TOWER CORPORATION
		
	By:	 	  

		 	Name:
		 	Title:
		
	By:	 	  

		 	Name:
		 	Title:

 Dated
                     

  
 A-2

 TRUSTEE’S CERTIFICATE OF AUTHENTICATION 
 This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture. 
 THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as Trustee 

 

			
	By:	 	  

		 	Authorized Signatory

			
	Dated:	 	  

  
 A-3

 [REVERSE OF SECURITY] 

AMERICAN TOWER CORPORATION 
 4.500% Senior Notes due 2018 
 1. Interest. American Tower
Corporation, a Delaware corporation (the “Company”), promises to pay interest on the principal amount of this Security at the rate per annum shown above. The Company will pay interest, payable semi-annually in arrears, on
January 15 and July 15 of each year, with the first payment to be made on July 15, 2011. Interest on the Securities will accrue on the principal amount from, and including, the most recent date to which interest has been paid or
provided for or, if no interest has been paid, from, and including, December 7, 2010, in each case to, but excluding, the next Interest Payment Date or the Stated Maturity for the payment of principal on the Securities, as the case may be;
provided that if there is no existing Default in the payment of interest, the Company shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue principal and premium, if any, from time to time on
demand at a rate that is 1% per annum in excess of the rate then in effect; it shall pay interest (including post-petition interest in any proceeding under any Bankruptcy Law) on overdue installments of interest (without regard to any
applicable grace periods) from time to time on demand at the same rate to the extent lawful. Interest will be computed on the basis of a 360-day year of twelve 30-day months. 
 2. Maturity. The Securities will mature on January 15, 2018. 

3. Method of Payment. Except as provided in the Indenture (as defined below), the Company will pay interest on the Securities
to the persons who are Holders of record of Securities at the close of business on the Regular Record Date set forth on the face of this Security next preceding the applicable Interest Payment Date. Holders must surrender Securities to a Paying
Agent to collect the principal amount. The Company will pay, in money of the United States that at the time of payment is legal tender for payment of public and private debts, all amounts due in cash with respect to the Securities, which amounts
shall be paid (A) in the case this Security is a Global Security, by wire transfer of immediately available funds to the account designated by the Depository for the Securities or its nominee; and (B) in the case this Security is a
Physical Security, by mailing a check to the address of the relevant Holder set forth in the Security Register for the Securities. The Company shall pay, in cash, interest on any overdue amount (including, to the extent permitted by applicable law,
overdue interest) at the rate borne by the Securities. 
 4. Paying Agent and Registrar. Initially, The Bank of New
York Mellon Trust Company, N.A. (the “Trustee”) will act as Paying Agent and Registrar. The Company may change any Paying Agent or Registrar upon prior written notice to the Trustee. The Company or any of its Subsidiaries may act in
any such capacity. 
 5. Indenture. The Company issued the Securities under an indenture dated as of May 13,
2010 (the “Base Indenture”) between the Company and the Trustee, as amended, supplemented or otherwise modified by the Supplemental Indenture No. 2 (the “Supplemental Indenture”), dated as of December 7,
2010, between the Company and the Trustee (the Base Indenture, as amended, supplemented or otherwise modified by the Supplemental Indenture, the “Indenture”). The terms of the Securities include those stated in the Indenture and
those made part of the Indenture by reference to the Trust Indenture Act of 1939 (15 U.S. Code §§ 77aaa-77bbbb) (the “TIA”) as amended and in effect from time to time. The Securities are subject to all such terms, and
Holders are referred to the Indenture and the TIA for a statement of such terms. To the extent any provision of this Security conflicts with the express provisions of the Indenture, the provisions of the Indenture shall govern and be controlling.
The Securities are general unsecured senior obligations of the Company. The Original Securities are limited to $1,000,000,000 aggregate principal amount, except as otherwise provided in the Indenture (except for Securities issued in substitution for
destroyed, mutilated, lost or stolen Securities). Subject to the conditions set forth in the Indenture and without the consent of the Holders, the Company may issue Additional Securities. All Securities, including any Additional Securities, will be
treated as a single class of securities under the Indenture. Terms used herein without definition and which are defined in the Indenture have the meanings assigned to them in the Indenture. 

  
 A-4

 6. Optional Redemption. The Securities are redeemable at the Company’s
election, in whole or in part, at any time at redemption price equal to the greater of: 
 (1) 100% of the principal amount of
the Securities to be redeemed then outstanding; and 
 (2) as determined by an Independent Investment Banker, the sum of the
present values of the remaining scheduled payments of principal and interest on the Securities to be redeemed (not including any portion of such payments of interest accrued to the date of redemption) discounted to the redemption date on a
semiannual basis (assuming a 360-day year consisting of twelve 30-day months) at the Adjusted Treasury Rate, plus 40 basis points; 
 plus, in
either of the above cases, accrued and unpaid interest to the date of redemption on the Securities to be redeemed. 
 If the
Company selects a redemption date that is on or after a Regular Record Date and on or before the related Interest Payment Date, the accrued and unpaid interest, if any, shall be paid to the person in whose name the Security is registered at the
close of business on such Regular Record Date. 
 The Company will mail or caused to be mailed a notice of redemption at least
30 days, but not more than 60 days, before the redemption date to each Holder of the Securities to be redeemed at its registered address, except that redemption notices may be mailed more than 60 days prior to a redemption date if the notice is
issued in connection with a defeasance of the Securities or a satisfaction and discharge of the Indenture. Notices of redemption may not be conditional. 
 Unless the Company defaults in payment of the redemption price, on and after the redemption date, interest will cease to accrue on the Securities or portions thereof called for redemption. Securities
called for redemption become due on the date fixed for redemption. 
 For purposes of the foregoing, the following terms shall
have the following meanings: 
 “Adjusted Treasury Rate” means, with respect to any redemption date:

 (1) the yield, under the heading which represents the average for the immediately preceding week, appearing in
the most recently published statistical release designated “H.15(519)” or any successor publication which is published weekly by the Board of Governors of the Federal Reserve System and which establishes yields on actively traded United
States Treasury securities adjusted to constant maturity under the caption “Treasury Constant Maturities,” for the maturity corresponding to the Comparable Treasury Issue (as defined below) (if no maturity is within three months before or
after the Remaining Life (as defined below), yields for the two published maturities most closely corresponding to the Comparable Treasury Issue shall be determined and the Adjusted Treasury Rate shall be interpolated or extrapolated from such
yields on a straight line basis, rounding to the nearest month); or 
 (2) if such release (or any successor
release) is not published during the week preceding the calculation date or does not contain such yields, the rate per annum equal to the semi-annual equivalent yield to maturity of the Comparable Treasury Issue, calculated using a price for the
Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price (as defined below) for such redemption date. 
 The Adjusted Treasury Rate shall be calculated on the third Business Day preceding the redemption date. 
 “Comparable Treasury Issue” means the United States Treasury security selected by an Independent Investment Banker (as defined below) as having a maturity comparable to the remaining term
of the Securities that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of the Securities
(“Remaining Life”). 

  
 A-5

 “Comparable Treasury Price” means, for any redemption date, (1) the
average of four Reference Treasury Dealer Quotations (as defined below) for such redemption date, after excluding the highest and lowest Reference Treasury Dealer Quotations, or (2) if the Independent Investment Banker obtains fewer than four
such Reference Treasury Dealer Quotations, the average of all such quotations. 
 “Independent Investment
Banker” means one of the Reference Treasury Dealers appointed by the Company. 
 “Reference Treasury
Dealer” means any of the primary U.S. Government securities dealers in New York City. 
 “Reference Treasury
Dealer Quotations” means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Independent Investment Banker, of the bid and asked prices for the Comparable Treasury Issue (expressed in
each case as a percentage of its principal amount) quoted in writing to the Independent Investment Banker at 5:00 p.m., New York City time, on the third Business Day preceding such redemption date. 

7. No Mandatory Redemption. The Company shall not be required to make mandatory redemption payments with respect to the
Securities. 
 8. Repurchase at Option of Holder. Upon the occurrence of a Change of Control Triggering Event, and
subject to certain conditions set forth in the Indenture, the Company will be required to offer to purchase all of the outstanding Securities at a purchase price equal to 101% of the principal amount thereof, plus accrued and unpaid interest, if
any, thereon to the date of repurchase. 
 9. Notice of Redemption. Notice of redemption shall be mailed at least 30
days but not more than 60 days before the redemption date to each Holder whose Securities are to be redeemed at its registered address, except that redemption notices may be mailed more than 60 days prior to a redemption date if the notice is issued
in connection with Article 10 or Article 11 of the Base Indenture. Securities in denominations larger than $2,000 may be redeemed in part but only in whole multiples of $1,000, unless all of the Securities held by a Holder are to be redeemed. Unless
the Company defaults in payment of the redemption price, on and after the redemption date interest ceases to accrue on Securities or portions thereof called for redemption. 
 10. Denominations, Transfer, Exchange. The Securities are in registered form, without coupons, in denominations of $2,000 principal amount and integral multiples of $1,000 principal amount.
The transfer of Securities may be registered and Securities may be exchanged as provided in the Indenture. The Registrar may require a Holder, among other things, to furnish appropriate endorsements and transfer documents. No service charge shall be
made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or similar governmental charge that may be imposed in connection with certain transfers or exchanges. The Company shall
not be required to register the transfer of or exchange any Security selected for redemption, except for the unredeemed portion of any Security being redeemed in part. Also, the Company need not exchange or register the transfer of any Securities
for a period of 15 days next preceding the first mailing of notice of redemption of Securities to be redeemed. 

11. Persons Deemed Owners. The registered Holder of a Security may be treated as the owner of such Security for all purposes.

 12. Merger or Consolidation. The Company shall not consolidate with or merge with or into, or sell, transfer,
lease, convey or otherwise dispose of all or substantially all of its property or assets to, another Person (including pursuant to a statutory arrangement), whether in a single transaction or series of related transactions, unless it complies with
Article 8 of the Base Indenture. 
 13. Amendments, Supplements and Waivers. The Indenture or the Securities
may be amended or supplemented as provided in the Indenture. 

  
 A-6

 14. Defaults and Remedies. The Events of Default relating to the Securities are
defined in Section 5.01 of the Base Indenture. If any Event of Default occurs and is continuing, the Trustee or the Holders of at least 25% in principal amount of the then outstanding Securities may declare the principal, premium, if any,
interest and any other monetary obligations on all the then outstanding Securities to be due and payable immediately. Notwithstanding the foregoing, in the case of an Event of Default arising from certain events of bankruptcy or insolvency, all
outstanding Securities will become due and payable immediately without further action or notice. 
 Holders may not enforce the
Indenture or the Securities except as provided in the Indenture. Subject to certain limitations, Holders of a majority in aggregate principal amount of the then outstanding Securities may direct the Trustee in its exercise of any trust or power. The
Trustee may withhold from Holders of the Securities notice of any continuing Default (except a Default relating to the payment of principal, premium, if any, or interest) if it determines that withholding notice is in their interest. The Holders of
a majority in aggregate principal amount of the Securities then outstanding by notice to the Trustee may on behalf of the Holders of all of the Securities waive any existing Default or and its consequences under the Indenture except a continuing
Default in payment of the principal of, premium, if any, or interest, if any, on, any of the Securities held by a non-consenting Holder. The Company is required to deliver to the Trustee annually a statement regarding compliance with the Indenture,
and the Company is required upon becoming aware of any Default or Event of Default, to deliver to the Trustee a statement specifying such Default or Event of Default. 
 15. Trustee Dealings with the Company. The Trustee, in its individual or any other capacity, may make loans to, accept deposits from, and perform services for the Company or its affiliates,
and may otherwise deal with the Company or its affiliates, as if it were not the Trustee. 
 16. No Recourse Against
Others. A director, officer, employee, incorporator or stockholder, of the Company, as such, shall not have any liability for any obligations of the Company under the Securities or the Indenture or for any claim based on, in respect of,
or by reason of, such obligations or their creation. Each Holder by accepting a Security waives and releases all such liability. The waiver and release are part of the consideration for the issuance of the Securities. 

17. Authentication. This Security shall not be valid until authenticated by the manual signature of the Trustee or an
authenticating agent in accordance with the Indenture. 
 18. Abbreviations. Customary abbreviations may be used in
the name of a Holder or an assignee, such as: TEN COM (= tenants in common), TEN ENT (= tenants by the entireties), JT TEN (= joint tenants with right of survivorship and not as tenants in common), CUST (= Custodian), and U/G/M/A (= Uniform Gifts to
Minors Act). 
 19. CUSIP and ISIN Numbers. Pursuant to a recommendation promulgated by the Committee on Uniform Security
Identification Procedures, the Company has caused CUSIP and ISIN numbers to be printed on the Securities and the Trustee may use CUSIP and ISIN numbers in notices of redemption as a convenience to Holders. No representation is made as to the
accuracy of such numbers either as printed on the Securities or as contained in any notice of redemption and reliance may be placed only on the other identification numbers placed thereon 

THE COMPANY WILL FURNISH TO ANY HOLDER UPON WRITTEN REQUEST AND WITHOUT CHARGE A COPY OF THE BASE INDENTURE OR THE SUPPLEMENTAL
INDENTURE. REQUESTS MAY BE MADE TO: 
 American Tower Corporation 

116 Huntington Avenue 
 Boston, MA 02116 
 Telecopier No.: (617) 375-7575 

Attention: Investor Relations. 

  
 A-7

 [FORM OF ASSIGNMENT] 

 

			
	I or we assign to	  	
		
	PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER	  	
		
	  
	  	
		
	(please print or type name and address)	  	
		
	  
	  	
		
	  
	  	
	
	the within Security and all rights thereunder, and hereby irrevocably constitute and appoint
		
	  
	  	
	
	Attorney to transfer the Security on the books of the Company with full power of substitution in the
premises.

  

			
	Dated:	 	  

 

			
		 	NOTICE: The signature on this assignment must correspond with the name as it appears upon the face of the within Security in every particular without alteration or enlargement or
any change whatsoever and be guaranteed by a guarantor institution participating in the Securities Transfer Agents Medallion Program or in such other guarantee program acceptable to the
Trustee.

  

					
	Signature Guarantee:	 	  
	 	

  
 A-8

 Option of Holder to Elect Purchase 

If you want to elect to have only part of the Security purchased by the Company pursuant to Section 4.01(b) of the Supplemental Indenture, state the
amount you elect to have purchased: 

$                    

Date:                  
   
 Your
Signature:                                       
                      

(Sign exactly as your name appears on 
 the face of this Security) 
 Tax Identification
No.:                                        
 
 Signature
Guarantee*:                                       
  
  

	*	Participant in a recognized Signature Guarantee Medallion Program (or other signature guarantor acceptable to the Trustee). 

  
 A-9

 SCHEDULE A 

SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL SECURITY* 

The initial principal amount of this Global Security is $1,000,000,000. The following exchanges of a part of this Global Security for an
interest in another Global Security or for Securities in certificated form, have been made: 
  

																	
	 Date of Exchange
	  	Amount of decrease 
in
Principal Amount of
this Global Security	 	  	Amount of increase 
in
Principal Amount of
this Global Security	 	  	Principal Amount of
this Global
Security
following such decrease
(or increase)	 	  	Signature
of
authorized officer of
Trustee
or
Custodian	 
		  				  				  				  			
		  				  				  				  			
		  				  				  				  			

  

	*	This schedule should be included only if the Security is issued in global form. 

  
 A-10

 EXHIBIT B 

FORM OF LEGEND FOR GLOBAL SECURITY 
 Any Global Security authenticated and delivered hereunder shall bear a legend in substantially the following form: 
 THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE DEPOSITARY OR A NOMINEE OF THE DEPOSITARY, WHICH MAY BE TREATED BY THE
COMPANY, THE TRUSTEE AND ANY AGENT THEREOF AS OWNER AND HOLDER OF THIS SECURITY FOR ALL PURPOSES. 
 UNLESS THIS
CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR
IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST
COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. 

TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF THE DEPOSITORY
TRUST COMPANY OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE. 

  
 B-1Form of MTN Linked to a Commodity Basket

 Exhibit 4.1 
 [Face of Note] 
 Unless this certificate is presented by an authorized
representative of The Depository Trust Company, a New York corporation (“DTC”), to the Company or its agent for registration of transfer, exchange or payment, and any certificate issued is registered in the name of Cede &
Co. or in such other name as requested by an authorized representative of DTC (and any payment is made to Cede & Co. or such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner hereof, Cede & Co., has an interest herein. 
  

			
	CUSIP NO. 94986RCA7	  	FACE AMOUNT: $                    
	REGISTERED NO.     	  	

 WELLS FARGO & COMPANY 

MEDIUM-TERM NOTE, SERIES K 
 Due Nine Months or More From Date of Issue 
 Notes Linked to a Commodity
Basket 
 due December 9, 2015 
 WELLS FARGO & COMPANY, a corporation duly organized and existing under the laws of the State of Delaware (hereinafter called the “Company,” which term includes any successor
corporation under the Indenture hereinafter referred to), for value received, hereby promises to pay to CEDE & Co., or registered assigns, an amount equal to the Redemption Amount (as defined below), in such coin or currency of the United
States of America as at the time of payment is legal tender for payment of public and private debts, on the Stated Maturity Date. The “Initial Stated Maturity Date” shall be December 9, 2015. If no Market Disruption Event (as
defined below) occurs or is continuing with respect to a Basket Component (as defined below) on the scheduled Calculation Day (as defined below), the Initial Stated Maturity Date will be the “Stated Maturity Date.” If a Market
Disruption Event occurs or is continuing with respect to a Basket Component on the scheduled Calculation Day, the “Stated Maturity Date” shall be the later of (i) three Business Days (as defined below) after the postponed
Calculation Day with respect to such Basket Component (or, if the Calculation Day is postponed with respect to more than one Basket Component, three Business Days after the latest postponed Calculation Day) and (ii) the Initial Stated Maturity
Date. This Security shall not bear any interest. 
 Any payments on this Security at Maturity will be made against presentation
of this Security at the office or agency of the Company maintained for that purpose in the City of Minneapolis, Minnesota and at any other office or agency maintained by the Company for such purpose. 

“Face Amount” shall mean, when used with respect to this Security, the amount set forth on the face of this Security as
its “Face Amount.” 

 Determination of Redemption Amount 

The “Redemption Amount” of this Security will equal: 

 

	 	•	 	 If the Ending Price is greater than the Starting Price: the lesser of: 

 

	 	(i)	the Face Amount plus: 

  

															
	[	 	Face Amount x	 	[	 	Ending Price – Starting Price	 	]	 	x Participation Rate	 	]	 	; and
	 	 	 	Starting Price	 	 	 	 

  

	 	(ii)	the Capped Value; 

  

	 	•	 	 If the Ending Price is less than or equal to the Starting Price, but greater than or equal to the Threshold Price: the Face Amount; or

  

	 	•	 	 If the Ending Price is less than the Threshold Price: the Face Amount minus: 

 

							
	[	 	Face Amount x	 	Threshold Price – Ending Price	 	 ]

	 	 	Starting Price	 

 “Basket” shall mean a basket comprised of the
following Basket Components, with the return of each Basket Component having the weighting noted parenthetically: crude oil (25%); gold (25%); copper (25%); and corn (25%). 
 “Basket Component” shall mean each of crude oil, gold, copper and corn. 
 The “Pricing Date” shall mean December 2, 2010. 
 The
“Starting Price” is 100. 
 The “Ending Price” will be calculated based on the weighted
returns of the Basket Components and will be equal to the product of (i) 100 and (ii) an amount equal to 1 plus the sum of: (A) 25% of the Component Return of crude oil; (B) 25% of the Component Return of gold; (C) 25% of
the Component Return of copper; and (D) 25% of the Component Return of corn. 
 The “Component Return” of
a Basket Component will be equal to: 
 Final Component Price – Initial Component Price 

Initial Component Price 
 where, 
  

	 	•	 	 the “Initial Component Price” is the Settlement Price of such Basket Component on the Pricing Date; and 

  
 2 

  

	 	•	 	 the “Final Component Price” will be the Settlement Price of such Basket Component on the Calculation Day.

 The Initial Component Prices of the Basket Components are as follows: crude oil ($88.00); gold ($1,389.00);
copper ($8,711.50); and corn (555.50¢). 
 The “Settlement Price” of a Basket Component on any day will
be: 
  

	 	(i)	in the case of crude oil, the official settlement price per barrel of the first nearby month futures contract for West Texas Intermediate light sweet crude oil,
expressed in U.S. dollars per barrel, traded on the New York Mercantile Exchange (“NYMEX”) on that day (the “NYMEX crude oil price”) as made public by the NYMEX; 

 

	 	(ii)	in the case of gold, the official afternoon fixing price per troy ounce of gold for delivery in London through a member of the London Bullion Market Association (the
“LBMA”) authorized to effect such delivery, expressed in U.S. dollars per troy ounce, as calculated by the London Gold Market on that day (the “London gold fixing price”); 

 

	 	(iii)	in the case of copper, the official cash offer price per tonne of copper Grade A on the London Metal Exchange (the “LME”) for the spot market,
expressed in U.S. dollars per tonne, traded on the LME on that day (the “LME copper Grade A price”) as made public by the LME; and 

  

	 	(iv)	in the case of corn, the official settlement price per bushel of deliverable-grade corn of the first nearby month futures contract (or, in the case of any Trading Day
after the date of the last trade of the options contract (if there is more than one options contract, then the options contract with the latest date) pertaining to the first nearby month futures contract, the second nearby month futures contract),
expressed in U.S. cents per bushel, traded on the Chicago Board of Trade (the “CBOT”) on that day (the “CBOT corn price”) as made public by the CBOT. 

The term “first nearby month futures contract” for corn on any day refers to the futures contract for corn with the last
Trading Day closest to such day and the term “second nearby month futures contract” for corn refers to the futures contract for corn with the last Trading Day immediately after the last Trading Day of the first nearby month futures
contract for corn. 
 The “Capped Value” is 167.5% of the Face Amount of this Security. 

The “Threshold Price” is equal to 75% of the Starting Price. 

The “Participation Rate” is 200%. 

  
 3 

 “Business Day” shall mean a day, other than a Saturday or Sunday, that is
neither a legal holiday nor a day on which banking institutions are authorized or required by law or regulation to close in New York, New York or Minneapolis, Minnesota. 
 A “Trading Day” means (i) with respect to crude oil, any day the NYMEX is open for trading, (ii) with respect to gold, any day the LBMA and is open for trading, (iii) with
respect to copper, any day the LME is open for trading, (iv) with respect to corn, any day the CBOT is open for trading. 

The “Calculation Day” shall be December 2, 2015 or, if such day is not a Trading Day, the next succeeding Trading
Day. The Calculation Day is subject to postponement due to the occurrence of a Market Disruption Event. If a Market Disruption Event occurs or is continuing with respect to a Basket Component on the Calculation Day, such Calculation Day for such
Basket Component will be postponed to the first succeeding Trading Day on which a Market Disruption Event for such Basket Component has not occurred and is not continuing. If such first succeeding Trading Day has not occurred as of the fifth
scheduled Trading Day after the scheduled Calculation Day for such Basket Component, that fifth scheduled Trading Day shall be deemed the Calculation Day. If the Calculation Day has been postponed five scheduled Trading Days after the scheduled
Calculation Day for such Basket Component and such fifth scheduled Trading Day is not a Trading Day, or if a Market Disruption Event occurs or is continuing with respect to the Basket Component on such fifth scheduled Trading Day, the Calculation
Agent will determine its good faith estimate of the Settlement Price of such Basket Component on such fifth scheduled Trading Day. Notwithstanding a postponement of a Calculation Day for a particular Basket Component due to a Market Disruption Event
with respect to such Basket Component, the originally scheduled Calculation Day will remain the Calculation Day for any Basket Component not affected by a Market Disruption Event. See “—Market Disruption Events.” 

“Calculation Agent Agreement” shall mean the Calculation Agent Agreement dated as of December 9, 2010 between the
Company and the Calculation Agent, as amended from time to time. 
 “Calculation Agent” shall mean the Person
that has entered into the Calculation Agent Agreement with the Company providing for, among other things, the determination of the Ending Price and the Redemption Amount, which term shall, unless the context otherwise requires, include its
successors under such Calculation Agent Agreement. The initial Calculation Agent shall be Wells Fargo Securities, LLC. Pursuant to the Calculation Agent Agreement, the Company may appoint a different Calculation Agent from time to time after the
initial issuance of this Security without the consent of the Holder of this Security and without notifying the Holder of this Security. 

  
 4 

 Market Disruption Events 

A “Market Disruption Event” means any of the following events as determined by the Calculation Agent in its sole
discretion: 
  

	 	(i)	with respect to crude oil: (A) a material limitation or suspension of trading in the first nearby month futures contract for WTI light sweet crude oil on NYMEX; or
(B) the failure of NYMEX to announce the NYMEX crude oil price; 

  

	 	(ii)	with respect to gold: (A) a material limitation or suspension of trading in the London afternoon gold fixing market; or (B) the failure of the London Gold
Market to announce or publish the London gold fixing price; 

  

	 	(iii)	with respect to copper: (A) a material limitation or suspension of trading in copper Grade A on the LME; or (B) the failure of the LME to announce the
LME copper Grade A price; and 

  

	 	(iv)	with respect to corn: (A) a material limitation or suspension of trading in the applicable futures contract for deliverable-grade corn; or (B) the failure of
CBOT to announce the CBOT corn price. 

 For purposes of determining whether a Market Disruption Event has occurred
or is continuing with respect to a Basket Component, a limitation on the hours or number of days of trading will not constitute a Market Disruption Event if it results from any announced change in the regular business hours of the relevant exchange.

 Discontinuance of Quotation; Alteration of Manner of Quotation 

If the quotation source for a commodity discontinues quoting the Settlement Price for such commodity as provided herein and another entity
publishes a quotation that the Calculation Agent determines, in its sole discretion, to be comparable to the discontinued quotation, then any subsequent Settlement Price will be determined by reference to the quotation of such Settlement Price
provided by such successor entity (in any such case, referred to herein as a “Successor Quotation Source”) on the date that the Settlement Price is to be determined. 

Upon any selection by the Calculation Agent of a Successor Quotation Source, the Company will cause notice to be given to the Holder of
this Security. 
 If the quotation source for a commodity discontinues quoting the Settlement Price for such commodity as
provided herein and the Calculation Agent determines that no Successor Quotation Source for such Settlement Price is available at such time, then any subsequent Settlement Price will be determined by reference to the Calculation Agent’s good
faith estimate of the Settlement Price for such commodity. 
 If a Successor Quotation Source is selected or the Calculation
Agent calculates a Settlement Price in the absence of a Successor Quotation Source, such Successor Quotation Source or Settlement Price will be used for all purposes with respect to calculation of the Redemption Amount, including for purposes of
determining whether a Market Disruption Event exists. 

  
 5 

 If the method of quoting a Settlement Price as provided herein is changed in a material
respect by a quotation source or a Successor Quotation Source, then the Calculation Agent will, on the date that the Settlement Price is to be determined, make such calculations and adjustments as, in the good faith judgment of the Calculation
Agent, may be necessary in order to arrive at a Settlement Price for such commodity as if such changes had not been made. The Calculation Agent will calculate the Redemption Amount with reference to the Settlement Price, as adjusted. 

Calculation Agent 

The Calculation Agent will determine the Redemption Amount and the Ending Price. In addition, the Calculation Agent will
(i) determine if adjustments are required to the Settlement Price of a Basket Component under the circumstances described in this Security, (ii) if a quotation source for a commodity discontinues quoting the Settlement Price for such
commodity, select a Successor Quotation Source or, if no Successor Quotation Source is available, determine the Settlement Price of such Basket Component, and (iii) determine whether a Market Disruption Event has occurred. 

The Company covenants that, so long as this Security is Outstanding, there shall at all times be a Calculation Agent (which shall be a
broker-dealer, bank or other financial institution) with respect to this Security. 
 All determinations made by the Calculation
Agent with respect to this Security will be at the sole discretion of the Calculation Agent and, in the absence of manifest error, will be conclusive for all purposes and binding on the Company and the Holder of this Security. All percentages and
other amounts resulting from any calculation with respect to this Security will be rounded at the Calculation Agent’s discretion. 

Tax Considerations 

The Company agrees, and by acceptance of a beneficial ownership interest in this Security each Holder of this Security will be deemed to
have agreed (in the absence of a statutory, regulatory, administrative or judicial ruling to the contrary), for United States federal income tax purposes to characterize and treat this Security as a pre-paid derivative contract in respect of the
Basket. 
 Redemption and Repayment 
 This Security is not subject to redemption at the option of the Company or repayment at the option of the Holder hereof prior to December 9, 2015. This Security is not entitled to any sinking fund.

 Acceleration 
 If an Event of Default, as defined in the Indenture, with respect to this Security shall occur and be continuing, the Redemption Amount (calculated as set forth in the next sentence) of this Security may
be declared due and payable in the manner and with the effect provided in the Indenture. The amount payable to the Holder hereof upon any acceleration permitted under the Indenture will be equal to the Redemption Amount hereof calculated as provided
herein as though the date of acceleration was the Calculation Day; provided, however, if such date is not a Trading Day or if a Market Disruption Event has occurred or is continuing on that day, the Calculation Day will be postponed as provided
herein. 

  
 6 

  
  

Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions shall for
all purposes have the same effect as if set forth at this place. 
 Unless the certificate of authentication hereon has been
executed by the Trustee referred to on the reverse hereof by manual signature or its duly authorized agent under the Indenture referred to on the reverse hereof by manual signature, this Security shall not be entitled to any benefit under the
Indenture or be valid or obligatory for any purpose. 
 [The remainder of this page has been left intentionally blank]

  
 7 

 IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed under its
corporate seal. 
 DATED:
                     
  

					
	WELLS FARGO & COMPANY
		
	By:	 	  

		 	  

		 	Its:	 	  

 

	
	[SEAL]

  

					
	Attest:	 	  

		 	  

		 	Its:	 	  

 

	
	 TRUSTEE’S CERTIFICATE OF

AUTHENTICATION

	 This is one of the Securities of the
 series designated therein described
 in the within-mentioned
Indenture.

  

	
	 CITIBANK, N.A.,
as Trustee

  

			
	By:	 	  

		 	Authorized Signature

  

	
	OR
	
	 WELLS FARGO BANK, N.A.,
as Authenticating Agent for the
Trustee

  

			
	By:	 	  

		 	Authorized Signature

  
 8 

 [Reverse of Note] 
 WELLS FARGO & COMPANY 
 MEDIUM-TERM NOTE, SERIES K

 Due Nine Months or More From Date of Issue 
 Notes Linked to a Commodity Basket 
 due December 9, 2015

 This Security is one of a duly authorized issue of securities of the Company (herein called the
“Securities”), issued and to be issued in one or more series under an indenture dated as of July 21, 1999, as amended or supplemented from time to time (herein called the “Indenture”), between the Company and
Citibank, N.A., as Trustee (herein called the “Trustee,” which term includes any successor trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the
respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities, and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is
one of the series of the Securities designated as Medium-Term Notes, Series K, of the Company, which series is limited to an aggregate principal amount or face amount, as applicable, of $25,000,000,000 or the equivalent thereof in one or more
foreign or composite currencies. The amount payable on the Securities of this series may be determined by reference to the performance of one or more equity-, commodity- or currency-based indices, exchange traded funds, securities, commodities,
currencies, statistical measures of economic or financial performance, or a basket comprised of two or more of the foregoing, or any other market measure or may bear interest at a fixed rate or a floating rate. The Securities of this series may
mature at different times, be redeemable at different times or not at all, be repayable at the option of the Holder at different times or not at all and be denominated in different currencies. 

Article Sixteen of the Indenture shall not apply to this Security. 

The Securities are issuable only in registered form without coupons and will be either (a) book-entry securities represented by one
or more Global Securities recorded in the book-entry system maintained by the Depositary or (b) certificated securities issued to and registered in the names of, the beneficial owners or their nominees. 

The Company agrees, to the extent permitted by law, not to voluntarily claim the benefits of any laws concerning usurious rates of
interest against a Holder of this Security. 
 Modification and Waivers 

The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and
obligations of the Company and the rights of the Holders of the Securities of each series to be affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of a majority in principal amount of the
Securities at the 

  
 9 

 
time Outstanding of all series to be affected, acting together as a class. The Indenture also contains provisions permitting the Holders of a majority in principal amount of the Securities of all
series at the time Outstanding affected by certain provisions of the Indenture, acting together as a class, on behalf of the Holders of all Securities of such series, to waive compliance by the Company with those provisions of the Indenture. Certain
past defaults under the Indenture and their consequences may be waived under the Indenture by the Holders of a majority in principal amount of the Securities of each series at the time Outstanding, on behalf of the Holders of all Securities of such
series. Solely for the purpose of determining whether any consent, waiver, notice or other action or Act to be taken or given by the Holders of Securities pursuant to the Indenture has been given or taken by the Holders of Outstanding Securities in
the requisite aggregate principal amount, the principal amount of this Security will be deemed to be equal to the amount set forth on the face hereof as the “Face Amount” hereof. Any such consent or waiver by the Holder of this Security
shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notation of such consent or
waiver is made upon this Security. 
 Defeasance 
 Section 403 and Article Fifteen of the Indenture and the provisions of clause (ii) of Section 401(1)(B) of the Indenture, relating to defeasance at any time of (a) the entire
indebtedness on this Security and (b) certain restrictive covenants and certain Events of Default, upon compliance by the Company with certain conditions set forth therein, shall not apply to this Security. The remaining provisions of
Section 401 of the Indenture shall apply to this Security. 
 Authorized Denominations 

This Security is issuable only in registered form without coupons in denominations of $1,000 or any amount in excess thereof which is an
integral multiple of $1,000. 
 Registration of Transfer 
 Upon due presentment for registration of transfer of this Security at the office or agency of the Company in the City of Minneapolis, Minnesota, a new Security or Securities of this series, with the same
terms as this Security, in authorized denominations for an equal aggregate Face Amount will be issued to the transferee in exchange herefor, as provided in the Indenture and subject to the limitations provided therein and to the limitations
described below, without charge except for any tax or other governmental charge imposed in connection therewith. 
 This
Security is exchangeable for definitive Securities in registered form only if (x) the Depositary notifies the Company that it is unwilling or unable to continue as Depositary for this Security or if at any time the Depositary ceases to be a
clearing agency registered under the Securities Exchange Act of 1934, as amended, and a successor depositary is not appointed within 90 days after the Company receives such notice or becomes aware of such ineligibility, (y) the Company in
its sole discretion determines that this Security shall be exchangeable for definitive Securities in registered form and notifies the Trustee thereof or (z) an Event of Default with respect to the Securities represented hereby has occurred and
is continuing. If this Security is exchangeable pursuant to the preceding sentence, it shall be exchangeable for definitive Securities in registered form, having the same date of issuance, Stated Maturity Date and other terms and of authorized
denominations aggregating a like amount. 

  
 10 

 This Security may not be transferred except as a whole by the Depositary to a nominee of the
Depositary or by a nominee of the Depositary to the Depositary or another nominee of the Depositary or by the Depositary or any such nominee to a successor of the Depositary or a nominee of such successor. Except as provided above, owners of
beneficial interests in this Global Security will not be entitled to receive physical delivery of Securities in definitive form and will not be considered the Holders hereof for any purpose under the Indenture. 

Prior to due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company or the
Trustee may treat the Person in whose name this Security is registered as the owner hereof for all purposes, whether or not this Security be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the
contrary. 
 Obligation of the Company Absolute 
 No reference herein to the Indenture and no provision of this Security or the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the Redemption
Amount at the times, place and rate, and in the coin or currency, herein prescribed, except as otherwise provided in this Security. 
 No
Personal Recourse 
 No recourse shall be had for the payment of the Redemption Amount, or for any claim based hereon, or
otherwise in respect hereof, or based on or in respect of the Indenture or any indenture supplemental thereto, against any incorporator, stockholder, officer or director, as such, past, present or future, of the Company or any successor corporation,
whether by virtue of any constitution, statute or rule of law, or by the enforcement of any assessment or penalty or otherwise, all such liability being, by the acceptance hereof and as part of the consideration for the issuance hereof, expressly
waived and released. 
 Defined Terms 
 All terms used in this Security which are defined in the Indenture shall have the meanings assigned to them in the Indenture unless otherwise defined in this Security. 

Governing Law 

This Security shall be governed by and construed in accordance with the law of the State of New York, without regard to principles of
conflicts of laws. 

  
 11 

 ABBREVIATIONS 

The following abbreviations, when used in the inscription on the face of this instrument, shall be construed as though they were written
out in full according to applicable laws or regulations: 
  

					
	TEN COM	 	—	  	as tenants in common
			
	TEN ENT	 	—	  	as tenants by the entireties
			
	JT TEN	 	—	  	as joint tenants with right of survivorship and not as tenants in common

  

							
	UNIF GIFT MIN ACT —	 	  
	  	Custodian	  	  

		 	(Cust)	  		  	(Minor)

  

	
	Under Uniform Gifts to Minors Act
	  

	(State)

 Additional
abbreviations may also be used though not in the above list. 
 FOR VALUE RECEIVED, the undersigned hereby sell(s) and
transfer(s) unto 
  

	
	Please Insert Social Security or
	Other Identifying Number of Assignee
	  

 

	
	  

	  

	  

	(PLEASE PRINT OR TYPE NAME AND ADDRESS
INCLUDING POSTAL ZIP CODE OF ASSIGNEE)

  
 12 

 the within Security of WELLS FARGO & COMPANY and does hereby irrevocably constitute and appoint
                                        
attorney to transfer the said Security on the books of the Company, with full power of substitution in the premises. 
 Dated:
                     
  

	
	  

	
	  

 NOTICE: The signature to this assignment must correspond with the name as written upon the face of the within instrument in every particular, without alteration or enlargement or any change whatever.

  
 13

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00182-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00182-of-00352.parquet"}]]