10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One):

☒ Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. For the quarterly period ended March 31, 2023.

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

Commission File Number: 001-14195

AMERICAN TOWER CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	65-0723837
(State or other jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)

116 Huntington Avenue

Boston, Massachusetts 02116

(Address of principal executive offices)

Telephone Number (617) 375-7500

(Registrant’s telephone number, including area code)

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

Title of each Class	Trading Symbol(s)	Name of exchange on which registered
Common Stock, $0.01 par value	AMT	New York Stock Exchange
1.375% Senior Notes due 2025	AMT 25A	New York Stock Exchange
1.950% Senior Notes due 2026	AMT 26B	New York Stock Exchange
0.450% Senior Notes due 2027	AMT 27C	New York Stock Exchange
0.400% Senior Notes due 2027	AMT 27D	New York Stock Exchange
0.500% Senior Notes due 2028	AMT 28A	New York Stock Exchange
0.875% Senior Notes due 2029	AMT 29B	New York Stock Exchange
0.950% Senior Notes due 2030	AMT 30C	New York Stock Exchange
1.000% Senior Notes due 2032	AMT 32	New York Stock Exchange
1.250% Senior Notes due 2033	AMT 33	New York Stock Exchange

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

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

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

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
Emerging growth company	☐

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

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

As of April 19, 2023, there were 466,043,234 shares of common stock outstanding.

AMERICAN TOWER CORPORATION

TABLE OF CONTENTS

QUARTERLY REPORT ON FORM 10-Q

FOR THE QUARTER ENDED MARCH 31, 2023

		Page Nos.
PART I. FINANCIAL INFORMATION
Item 1.	Unaudited Consolidated and Condensed Consolidated Financial Statements		1
	Consolidated Balance Sheets as of March 31, 2023 and December 31, 2022		1
	Consolidated Statements of Operations for the three months ended March 31, 2023 and 2022		2
	Consolidated Statements of Comprehensive (Loss) Income for the three months ended March 31, 2023 and 2022		3
	Consolidated Statements of Cash Flows for the three months ended March 31, 2023 and 2022		4
	Consolidated Statements of Equity for the three months ended March 31, 2023 and 2022		5
	Notes to Consolidated and Condensed Consolidated Financial Statements		6
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		27
Item 3.	Quantitative and Qualitative Disclosures about Market Risk		50
Item 4.	Controls and Procedures		50
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings		52
Item 1A.	Risk Factors		52
Item 6.	Exhibits		53
Signatures			55

PART I. FINANCIAL INFORMATION

ITEM 1. UNAUDITED CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(in millions, except share count and per share data)

	March 31, 2023		December 31, 2022
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	1,803.0	$	2,028.4
Restricted cash	122.4		112.3
Accounts receivable, net	705.4		758.3
Prepaid and other current assets	819.3		723.3
Total current assets	3,450.1		3,622.3
PROPERTY AND EQUIPMENT, net	19,843.3		19,998.3
GOODWILL	12,997.2		12,956.7
OTHER INTANGIBLE ASSETS, net	17,637.1		17,983.3
DEFERRED TAX ASSET	107.4		129.2
DEFERRED RENT ASSET	3,160.3		3,039.1
RIGHT-OF-USE ASSET	8,952.4		8,918.9
NOTES RECEIVABLE AND OTHER NON-CURRENT ASSETS	669.9		546.7
TOTAL	$	66,817.7	$	67,194.5
LIABILITIES
CURRENT LIABILITIES:
Accounts payable	$	206.0	$	218.6
Accrued expenses	1,171.6		1,344.2
Distributions payable	745.3		745.3
Accrued interest	208.5		261.0
Current portion of operating lease liability	790.1		788.9
Current portion of long-term obligations	3,856.4		4,514.2
Unearned revenue	554.2		439.7
Total current liabilities	7,532.1		8,311.9
LONG-TERM OBLIGATIONS	34,685.6		34,156.0
OPERATING LEASE LIABILITY	7,576.9		7,591.9
ASSET RETIREMENT OBLIGATIONS	2,093.5		2,047.4
DEFERRED TAX LIABILITY	1,505.6		1,492.0
OTHER NON-CURRENT LIABILITIES	1,173.7		1,186.8
Total liabilities	54,567.4		54,786.0
COMMITMENTS AND CONTINGENCIES
EQUITY (shares in thousands):
Common stock: $.01 par value; 1,000,000 shares authorized; 477,042 and 476,623 shares issued; and 466,038 and 465,619 shares outstanding, respectively	4.8		4.8
Additional paid-in capital	14,725.6		14,689.0
Distributions in excess of earnings	(2,496.5)		(2,101.9)
Accumulated other comprehensive loss	(5,526.1)		(5,718.3)
Treasury stock (11,004 shares at cost)	(1,301.2)		(1,301.2)
Total American Tower Corporation equity	5,406.6		5,572.4
Noncontrolling interests	6,843.7		6,836.1
Total equity	12,250.3		12,408.5
TOTAL	$	66,817.7	$	67,194.5

See accompanying notes to unaudited consolidated and condensed consolidated financial statements.

1

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(in millions, except share and per share data)

	Three Months Ended March 31,
	2023		2022
REVENUES:
Property	$	2,714.5	$	2,600.8
Services	52.7		59.5
Total operating revenues	2,767.2		2,660.3
OPERATING EXPENSES:
Costs of operations (exclusive of items shown separately below):
Property	787.0		771.5
Services	19.1		27.9
Depreciation, amortization and accretion	794.1		815.8
Selling, general, administrative and development expense	263.9		293.9
Other operating expenses	127.5		26.1
Total operating expenses	1,991.6		1,935.2
OPERATING INCOME	775.6		725.1
OTHER INCOME (EXPENSE):
Interest income	30.8		9.9
Interest expense	(340.2)		(262.4)
Other (expense) income (including foreign currency (losses) gains of $(84.1) and $242.1, respectively)	(97.8)		252.6
Total other (expense) income	(407.2)		0.1
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	368.4		725.2
Income tax provision	(53.4)		(22.5)
NET INCOME	315.0		702.7
Net loss attributable to noncontrolling interests	20.8		9.0
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS	$	335.8	$	711.7
NET INCOME PER COMMON SHARE AMOUNTS:
Basic net income attributable to American Tower Corporation common stockholders	$	0.72	$	1.56
Diluted net income attributable to American Tower Corporation common stockholders	$	0.72	$	1.56
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (in thousands):
BASIC	465,741		455,946
DILUTED	466,810		457,211

See accompanying notes to unaudited consolidated and condensed consolidated financial statements.

2

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

(in millions)

	Three Months Ended March 31,
	2023		2022
Net income	$	315.0	$	702.7
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax (benefit) expense of $(0.0) and $0.0, respectively	232.1		94.4
Other comprehensive income	232.1		94.4
Comprehensive income	547.1		797.1
Comprehensive (income) loss attributable to noncontrolling interests	(19.1)		100.5
Comprehensive income attributable to American Tower Corporation stockholders	$	528.0	$	897.6

See accompanying notes to unaudited consolidated and condensed consolidated financial statements.

3

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in millions)

	Three Months Ended March 31,
	2023		2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	315.0	$	702.7
Adjustments to reconcile net income to cash provided by operating activities
Depreciation, amortization and accretion	794.1		815.8
Stock-based compensation expense	65.5		56.7
Other non-cash items reflected in statements of operations	235.3		(232.8)
Increase in net deferred rent balances	(112.0)		(109.3)
Right-of-use asset and Operating lease liability, net	(44.9)		(26.6)
Changes in unearned revenue	96.2		(201.4)
Increase in assets	(170.1)		(171.5)
Decrease in liabilities	(108.6)		(170.0)
Cash provided by operating activities	1,070.5		663.6
CASH FLOWS FROM INVESTING ACTIVITIES
Payments for purchase of property and equipment and construction activities	(461.9)		(386.1)
Payments for acquisitions, net of cash acquired	(60.9)		(128.6)
Proceeds from sale of short-term investments and other non-current assets	3.1		3.2
Deposits and other	242.9		(1.6)
Cash used for investing activities	(276.8)		(513.1)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from short-term borrowings, net	154.1		—
Borrowings under credit facilities	1,745.0		2,250.0
Proceeds from issuance of senior notes, net	1,494.2		—
Proceeds from issuance of securities in securitization transaction	1,300.0		—
Repayments of notes payable, credit facilities, senior notes, secured debt, term loans and finance leases	(4,897.9)		(1,817.1)
Distributions to noncontrolling interest holders	(11.2)		(0.1)
Proceeds from stock options	1.8		8.0
Distributions paid on common stock	(733.6)		(641.2)
Deferred financing costs and other financing activities	(65.0)		(50.5)
Cash used for financing activities	(1,012.6)		(250.9)
Net effect of changes in foreign currency exchange rates on cash and cash equivalents, and restricted cash	3.6		28.5
NET DECREASE IN CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH	(215.3)		(71.9)
CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH, BEGINNING OF PERIOD	2,140.7		2,343.3
CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH, END OF PERIOD	$	1,925.4	$	2,271.4
CASH PAID FOR INCOME TAXES (NET OF REFUNDS OF $8.4 AND $0.3, RESPECTIVELY)	$	62.3	$	99.8
CASH PAID FOR INTEREST	$	388.9	$	304.0
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Purchases of property and equipment under finance leases and perpetual easements	$	7.3	$	1.8
Decrease in accounts payable and accrued expenses for purchases of property and equipment and construction activities	$	(71.7)	$	(46.9)

See accompanying notes to unaudited consolidated and condensed consolidated financial statements.

4

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EQUITY

(in millions, share counts in thousands)

	Common Stock			Treasury Stock			Additional Paid-in Capital		Accumulated Other Comprehensive Loss		Distributions in Excess of Earnings		Noncontrolling Interests		Total Equity
Three Months Ended March 31, 2022 and 2023	Issued Shares	Amount		Shares	Amount
BALANCE, JANUARY 1, 2022	466,687	$	4.7	(10,915)	$	(1,282.4)	$	12,240.2	$	(4,738.9)	$	(1,142.4)	$	3,988.4	$	9,069.6
Stock-based compensation related activity	505	0.0		—	—		25.9		—		—		—		25.9
Foreign currency translation adjustment, net of tax	—	—		—	—		—		185.9		—		(91.5)		94.4
Distributions to noncontrolling interest holders	—	—		—	—		—		—		—		(0.2)		(0.2)
Common stock distributions declared	—	—		—	—		—		—		(641.7)		—		(641.7)
Net income (loss)	—	—		—	—		—		—		711.7		(9.0)		702.7
BALANCE, MARCH 31, 2022	467,192	$	4.7	(10,915)	$	(1,282.4)	$	12,266.1	$	(4,553.0)	$	(1,072.4)	$	3,887.7	$	9,250.7
BALANCE, JANUARY 1, 2023	476,623	$	4.8	(11,004)	$	(1,301.2)	$	14,689.0	$	(5,718.3)	$	(2,101.9)	$	6,836.1	$	12,408.5
Stock-based compensation related activity	419	0.0		—	—		36.6		—		—		—		36.6
Foreign currency translation adjustment, net of tax	—	—		—	—		—		192.2		—		39.9		232.1
Distributions to noncontrolling interest holders	—	—		—	—		—		—		—		(11.5)		(11.5)
Common stock distributions declared	—	—		—	—		—		—		(730.4)		—		(730.4)
Net income (loss)	—	—		—	—		—		—		335.8		(20.8)		315.0
BALANCE, MARCH 31, 2023	477,042	$	4.8	(11,004)	$	(1,301.2)	$	14,725.6	$	(5,526.1)	$	(2,496.5)	$	6,843.7	$	12,250.3

See accompanying notes to unaudited consolidated and condensed consolidated financial statements.

5

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

1.    BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

The accompanying consolidated and condensed consolidated financial statements have been prepared by American Tower Corporation (together with its subsidiaries, “ATC” or the “Company”) pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). The financial information included herein is unaudited. However, the Company believes that all adjustments, which are of a normal and recurring nature, considered necessary for a fair presentation of its financial position and results of operations for such periods have been included herein. The consolidated and condensed consolidated financial statements and related notes should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2022 (the “2022 Form 10-K”). The results of operations for the three months ended March 31, 2023 are not necessarily indicative of the results that may be expected for the entire year.

Principles of Consolidation and Basis of Presentation—The accompanying consolidated and condensed consolidated financial statements include the accounts of the Company and those entities in which it has a controlling interest. Investments in entities that the Company does not control are accounted for using the equity method or as investments in equity securities, depending upon the Company’s ability to exercise significant influence over operating and financial policies. All intercompany accounts and transactions have been eliminated.

As of March 31, 2023, the Company holds (i) a 52% controlling interest in subsidiaries whose holdings consist of the Company’s operations in France, Germany, Poland and Spain (such subsidiaries, collectively, “ATC Europe”) (Allianz and CDPQ (each as defined in note 11) hold the noncontrolling interests), (ii) a 51% controlling interest in a joint venture whose holdings consist of the Company’s operations in Bangladesh (Confidence Tower Holdings Ltd. (“Confidence Group”) holds the noncontrolling interests) and (iii) a common equity interest of approximately 72% in the Company’s U.S. data center business (Stonepeak (as defined and further discussed in note 11) holds approximately 28% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity). As of March 31, 2023, ATC Europe holds an 87% and an 83% controlling interest in subsidiaries that consist of the Company’s operations in Germany and Spain, respectively (PGGM holds the noncontrolling interests). See note 11 for a discussion of changes to the Company’s noncontrolling interests during the three months ended March 31, 2023 and 2022.

Sale of Mexico Fiber— On March 29, 2023, the Company completed the sale of one of its subsidiaries in Mexico that held fiber assets (“Mexico Fiber”) for total consideration of $252.5 million, resulting in a loss on the sale of $80.0 million, which was included in Other operating expenses in the accompanying consolidated statements of operations. As a result of the transaction, the Company disposed of $20.7 million of goodwill based on the relative fair value of Mexico Fiber and the portion of the applicable goodwill reporting unit that was expected to be retained. Prior to the divestiture, Mexico Fiber’s operating results were included within the Latin America property segment. The divestiture did not qualify for presentation as a discontinued operation.

Reportable Segments—The Company reports its results in seven segments – U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property, Data Centers and Services, which are discussed further in note 15.

Significant Accounting Policies—The Company’s significant accounting policies are described in note 1 to the Company’s consolidated financial statements included in the 2022 Form 10-K. There have been no material changes to the Company’s significant accounting policies during the three months ended March 31, 2023.

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

	Three Months Ended March 31,
	2023		2022
Cash and cash equivalents	$	1,803.0	$	1,941.5
Restricted cash	122.4		329.9
Total cash, cash equivalents and restricted cash	$	1,925.4	$	2,271.4

Restricted cash as of March 31, 2022 includes advance payments from a customer received during the year ended December 31, 2021.

6

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

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

Non-lease property revenue—Non-lease property revenue consists primarily of revenue generated from DAS networks, fiber and other property related revenue. DAS networks and fiber arrangements generally require that the Company provide the tenant the right to use available capacity on the applicable communications infrastructure. Performance obligations are satisfied over time for the duration of the arrangements. Non-lease property revenue also includes revenue generated from interconnection offerings in the Company’s data center facilities. Interconnection offerings are generally contracted on a month-to-month basis and are cancellable by the Company or the data center customer at any time. Performance obligations are satisfied over time for the duration of the arrangements. Other property related revenue streams, which include site inspections, are not material on either an individual or consolidated basis. There were no material changes in the receivables, contract assets and contract liabilities from contracts with customers for the three months ended March 31, 2023.

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

A summary of revenue disaggregated by source and geography is as follows:

Three Months Ended March 31, 2023	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	71.0	$	2.3	$	6.7	$	3.4	$	41.3	$	28.3	$	153.0
Services revenue	52.7		—		—		—		—		—		52.7
Total non-lease revenue	$	123.7	$	2.3	$	6.7	$	3.4	$	41.3	$	28.3	$	205.7
Property lease revenue	1,216.6		248.8		310.3		188.3		422.8		174.7		2,561.5
Total revenue	$	1,340.3	$	251.1	$	317.0	$	191.7	$	464.1	$	203.0	$	2,767.2

Three Months Ended March 31, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	74.2	$	3.0	$	7.1	$	2.4	$	37.3	$	25.8	$	149.8
Services revenue	59.5		—		—		—		—		—		59.5
Total non-lease revenue	$	133.7	$	3.0	$	7.1	$	2.4	$	37.3	$	25.8	$	209.3
Property lease revenue	1,158.2		295.5		260.7		196.1		382.0		158.5		2,451.0
Total revenue	$	1,291.9	$	298.5	$	267.8	$	198.5	$	419.3	$	184.3	$	2,660.3

Property revenue for the three months ended March 31, 2023 and 2022 includes straight-line revenue of $112.0 million and $109.4 million, respectively.

The Company actively monitors the creditworthiness of its customers. In recognizing customer revenue, the Company assesses the collectibility of both the amounts billed and the portion recognized in advance of billing on a straight-line basis. This assessment takes customer credit risk and business and industry conditions into consideration to ultimately determine the collectibility of the amounts billed. To the extent the amounts, based on management’s estimates, may not be collectible, revenue recognition is deferred until such point as collectibility is determined to be reasonably assured.

7

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

During the three months ended March 31, 2023, the Company deferred recognition of revenue of approximately $33.0 million related to a customer in India.

2.    PREPAID AND OTHER CURRENT ASSETS

Prepaid and other current assets consisted of the following:

	As of
	March 31, 2023		December 31, 2022
Prepaid assets	$	95.3	$	100.7
Prepaid income tax	153.0		139.3
Unbilled receivables	308.5		283.8
Value added tax and other consumption tax receivables	58.2		83.6
Other miscellaneous current assets (1)	204.3		115.9
Prepaid and other current assets	$	819.3	$	723.3

_______________

(1)Includes short-term portion of the VIL OCDs (as defined and further discussed in note 7).

3.    LEASES

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

During the three months ended March 31, 2023, the Company made no changes to the methods described in note 4 to its consolidated financial statements included in the 2022 Form 10-K. As of March 31, 2023, the Company does not have any material related party leases as either a lessor or a lessee. To the extent there are any intercompany leases, these are eliminated in consolidation.

Lessor— Historically, the Company has been able to successfully renew its applicable leases as needed to ensure continuation of its revenue. Accordingly, the Company assumes that it will have access to the communications infrastructure or ground space underlying its sites when calculating future minimum rental receipts through the end of the respective terms. Future minimum rental receipts expected under non-cancellable operating lease agreements as of March 31, 2023 were as follows:

Fiscal Year	Amount (1) (2)
Remainder of 2023	$	5,937.0
2024	7,616.7
2025	7,157.0
2026	6,667.0
2027	6,521.2
Thereafter	28,680.8
Total	$	62,579.7

_______________

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

(2)Balances represent contractual amounts owned with no adjustments made for expected collectibility.

Lessee—The Company assesses its right-of-use asset and other lease-related assets for impairment, as described in note 1 to the Company’s consolidated financial statements included in the 2022 Form 10-K. There were no material impairments recorded related to these assets during the three months ended March 31, 2023 and 2022.

The Company leases certain land, buildings, equipment and office space under operating leases and land and improvements, towers, equipment and vehicles under finance leases. As of March 31, 2023, operating lease assets were included in Right-of-use asset and finance lease assets were included in Property and equipment, net in the consolidated balance sheet. During the three months ended March 31, 2023, other than leases acquired in connection with acquisitions, there were no material changes in the terms and provisions of the Company’s operating leases in which the

8

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Company is a lessee. There were no material changes in finance lease assets and liabilities during the three months ended March 31, 2023.

Information about other lease-related balances is as follows:

	As of
	March 31, 2023		December 31, 2022
Operating leases:
Right-of-use asset	$	8,952.4	$	8,918.9
Current portion of lease liability	$	790.1	$	788.9
Lease liability	7,576.9		7,591.9
Total operating lease liability	$	8,367.0	$	8,380.8

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

	As of
	March 31, 2023		December 31, 2022
Operating leases:
Weighted-average remaining lease term (years)	12.1		12.2
Weighted-average incremental borrowing rate	5.5	%	5.3	%

The following table sets forth the components of lease cost:

	Three Months Ended March 31,
	2023		2022
Operating lease cost	$	306.7	$	306.5
Variable lease costs not included in lease liability (1)	109.1		101.4

______________

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

Supplemental cash flow information is as follows:

	Three Months Ended March 31,
	2023		2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(342.6)	$	(336.3)
Non-cash items:
New operating leases (1)	$	56.5	$	58.6
Operating lease modifications and reassessments (2)	$	102.9	$	(11.2)

______________

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

(2)For the three months ended March 31, 2022, includes a reduction of the operating lease liability due to purchase accounting measurement period adjustments.

As of March 31, 2023, the Company does not have material operating or financing leases that have not yet commenced.

9

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Maturities of operating lease liabilities as of March 31, 2023 were as follows:

Fiscal Year	Operating Lease (1)
Remainder of 2023	$	892.1
2024	1,096.6
2025	1,036.4
2026	976.4
2027	912.6
Thereafter	6,515.1
Total lease payments	11,429.2
Less amounts representing interest	(3,062.2)
Total lease liability	8,367.0
Less current portion of lease liability	790.1
Non-current lease liability	$	7,576.9

_______________

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

4.    GOODWILL AND OTHER INTANGIBLE ASSETS

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

	Property												Services		Total
	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Balance as of January 1, 2023	$	4,637.5	$	889.2	$	548.5	$	3,044.0	$	915.5	$	2,920.0	$	2.0	$	12,956.7
Other (1)	—		—		—		—		(20.7)		—		—		(20.7)
Effect of foreign currency translation	0.1		5.8		(18.7)		37.9		36.1		—		—		61.2
Balance as of March 31, 2023	$	4,637.6	$	895.0	$	529.8	$	3,081.9	$	930.9	$	2,920.0	$	2.0	$	12,997.2

_______________

(1)Other represents the goodwill associated with Mexico Fiber, which was sold during the three months ended March 31, 2023.

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

		As of March 31, 2023						As of December 31, 2022
	Estimated Useful Lives (years)	Gross Carrying Value		Accumulated Amortization		Net Book Value		Gross Carrying Value		Accumulated Amortization		Net Book Value
Acquired network location intangibles (1)	Up to 20	$	6,076.0	$	(2,612.9)	$	3,463.1	$	6,058.2	$	(2,537.9)	$	3,520.3
Acquired tenant-related intangibles	Up to 20	18,979.2		(6,088.4)		12,890.8		18,941.2		(5,827.7)		13,113.5
Acquired licenses and other intangibles	2-20	1,772.3		(489.1)		1,283.2		1,772.9		(423.4)		1,349.5
Total other intangible assets		$	26,827.5	$	(9,190.4)	$	17,637.1	$	26,772.3	$	(8,789.0)	$	17,983.3

_______________

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

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

10

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

intangibles represent the value of acquired licenses, trade name and in place leases. In place lease value represents the fair value of costs avoided in securing data center customers, including vacancy periods, legal costs and commissions. In place lease value also includes assumptions on similar costs avoided upon the renewal or extension of existing leases on a basis consistent with occupancy assumptions used in the fair value of other assets.

The Company amortizes its acquired intangible assets on a straight-line basis over their estimated useful lives. As of March 31, 2023, the remaining weighted average amortization period of the Company’s intangible assets was 15 years. Amortization of intangible assets for the three months ended March 31, 2023 and 2022 was $369.5 million and $458.6 million, respectively. Based on current exchange rates, the Company expects to record amortization expense as follows over the remaining current year and the five subsequent years:

Fiscal Year	Amount
Remainder of 2023	$	1,061.2
2024	1,344.0
2025	1,292.5
2026	1,240.5
2027	1,226.1
2028	1,219.5

5.    ACCRUED EXPENSES

Accrued expenses consisted of the following:

	As of
	March 31, 2023		December 31, 2022
Accrued construction costs	$	151.8	$	230.8
Accrued income tax payable	30.7		29.8
Accrued pass-through costs	81.5		85.1
Amounts payable for acquisitions	11.5		55.2
Amounts payable to tenants	101.5		95.2
Accrued property and real estate taxes	275.3		270.1
Accrued rent	78.7		77.3
Payroll and related withholdings	88.5		140.4
Other accrued expenses	352.1		360.3
Total accrued expenses	$	1,171.6	$	1,344.2

6.    LONG-TERM OBLIGATIONS

Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums, debt issuance costs and fair value adjustments due to interest rate swaps consisted of the following:

	As of
	March 31, 2023		December 31, 2022		Maturity Date
2021 Multicurrency Credit Facility (1) (2)	$	2,882.7	$	3,788.7	June 30, 2025
2021 Term Loan (1)	996.5		996.3		January 31, 2027
2021 Credit Facility (1)	1,165.0		1,080.0		January 31, 2027
2021 EUR Three Year Delayed Draw Term Loan (1) (2)	894.0		882.9		May 28, 2024
2021 USD Two Year Delayed Draw Term Loan (1)	1,499.5		1,499.3		December 28, 2023
3.50% senior notes (3)	—		999.8		January 31, 2023
3.000% senior notes	697.9		694.5		June 15, 2023
0.600% senior notes	499.2		498.9		January 15, 2024
5.00% senior notes	1,000.2		1,000.5		February 15, 2024
3.375% senior notes	648.7		648.3		May 15, 2024
2.950% senior notes	646.9		646.4		January 15, 2025
2.400% senior notes	747.6		747.3		March 15, 2025
1.375% senior notes (4)	539.1		532.1		April 4, 2025

11

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

4.000% senior notes	747.1		746.8		June 1, 2025
1.300% senior notes	497.6		497.3		September 15, 2025
4.400% senior notes	498.3		498.1		February 15, 2026
1.600% senior notes	696.6		696.3		April 15, 2026
1.950% senior notes (4)	538.9		532.1		May 22, 2026
1.450% senior notes	594.8		594.5		September 15, 2026
3.375% senior notes	993.4		992.9		October 15, 2026
3.125% senior notes	398.7		398.6		January 15, 2027
2.750% senior notes	746.3		746.1		January 15, 2027
0.450% senior notes (4)	808.5		798.2		January 15, 2027
0.400% senior notes (4)	537.3		530.4		February 15, 2027
3.650% senior notes	643.7		643.3		March 15, 2027
3.55% senior notes	746.5		746.3		July 15, 2027
3.600% senior notes	695.4		695.1		January 15, 2028
0.500% senior notes (4)	806.8		796.6		January 15, 2028
1.500% senior notes	646.6		646.5		January 31, 2028
5.500% senior notes	692.6		—		March 15, 2028
3.950% senior notes	592.9		592.6		March 15, 2029
0.875% senior notes (4)	808.0		797.8		May 21, 2029
3.800% senior notes	1,637.3		1,636.8		August 15, 2029
2.900% senior notes	743.6		743.4		January 15, 2030
2.100% senior notes	742.4		742.2		June 15, 2030
0.950% senior notes (4)	535.3		528.5		October 5, 2030
1.875% senior notes	792.7		792.5		October 15, 2030
2.700% senior notes	694.6		694.4		April 15, 2031
2.300% senior notes	692.1		691.9		September 15, 2031
1.000% senior notes (4)	697.9		689.1		January 15, 2032
4.050% senior notes	642.4		642.2		March 15, 2032
5.650% senior notes	789.9		—		March 15, 2033
1.250% senior notes (4)	535.2		528.5		May 21, 2033
3.700% senior notes	592.3		592.2		October 15, 2049
3.100% senior notes	1,038.3		1,038.3		June 15, 2050
2.950% senior notes	1,022.7		1,022.5		January 15, 2051
Total American Tower Corporation debt	36,064.0		36,307.0
Series 2013-2A securities (5)	—		1,299.7		N/A
Series 2018-1A securities (6)	496.3		496.1		March 15, 2028
Series 2023-1A securities (7)	1,281.6		—		March 15, 2028
Series 2015-2 notes (8)	523.6		523.4		June 16, 2025
Other subsidiary debt (9)	155.5		16.2		Various
Total American Tower subsidiary debt	2,457.0		2,335.4
Finance lease obligations	21.0		27.8
Total	38,542.0		38,670.2
Less current portion of long-term obligations	(3,856.4)		(4,514.2)
Long-term obligations	$	34,685.6	$	34,156.0

_______________

(1)Accrues interest at a variable rate.

(2)Reflects borrowings denominated in Euro (“EUR”) and, for the 2021 Multicurrency Credit Facility (as defined below), reflects borrowings denominated in both EUR and U.S. Dollars (“USD”).

(3)Repaid in full on January 31, 2023 using borrowings under the 2021 Credit Facility (as defined below).

(4)Notes are denominated in EUR.

(5)Repaid in full on the March 2023 repayment date using proceeds from the 2023 Securitization (as defined below).

(6)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2048.

(7)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2053.

(8)Maturity date reflects the anticipated repayment date; final legal maturity is June 15, 2050.

12

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

(9)Includes amounts drawn under letters of credit in Nigeria, which are denominated in USD, and the India Term Loan (as defined below), which is denominated in Indian Rupee (“INR”).

Current portion of long-term obligations— The Company’s current portion of long-term obligations primarily includes (i) $1.5 billion in borrowings under the 2021 USD Two Year Delayed Draw Term Loan (as defined below), (ii) $700.0 million aggregate principal amount of the Company’s 3.000% senior unsecured notes due June 15, 2023, (iii) $500.0 million aggregate principal amount of the Company’s 0.600% senior unsecured notes due January 15, 2024 and (iv) $1.0 billion aggregate principal amount of the Company’s 5.00% senior unsecured notes due February 15, 2024.

Securitized Debt—Cash flows generated by the communications sites that secure the securitized debt of the Company are only available for payment of such debt and are not available to pay the Company’s other obligations or the claims of its creditors. However, subject to certain restrictions, the Company holds the right to receive the excess cash flows not needed to service the securitized debt and other obligations arising out of the securitizations. The securitized debt is the obligation of the issuers thereof or borrowers thereunder, as applicable, and their subsidiaries, and not of the Company or its other subsidiaries.

Repayment of Series 2013-2A Securities—On the March 2023 repayment date, the Company repaid the entire $1.3 billion aggregate principal amount outstanding under the Company’s Secured Tower Revenue Securities, Series 2013-2A due 2023 (the “Series 2013-2A Notes”), pursuant to the terms of the agreements governing such securities. The repayment was funded with proceeds from the 2023 Securitization (as defined below).

Secured Tower Revenue Securities, Series 2023-1, Subclass A and Series 2023-1, Subclass R—On March 13, 2023, the Company completed a securitization transaction (the “2023 Securitization”), in which American Tower Trust I (the “Trust”) issued $1.3 billion aggregate principal amount of Secured Tower Revenue Securities, Series 2023-1, Subclass A (the “Series 2023-1A Securities”). To satisfy the applicable risk retention requirements of Regulation RR promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act” and, such requirements, the “Risk Retention Rules”), the Trust issued, and one of the Company’s affiliates purchased, $68.5 million aggregate principal amount of Secured Tower Revenue Securities, Series 2023-1, Subclass R (the “Series 2023-1R Securities” and, together with the Series 2023-1A Securities, the “2023 Securities”) to retain an “eligible horizontal residual interest” (as defined in the Risk Retention Rules) in an amount equal to at least 5% of the fair value of the 2023 Securities.

The assets of the Trust consist of a nonrecourse componentized loan, which also secures each of (i) the Secured Tower Revenue Securities, Series 2018-1, Subclass A (the “Series 2018-1A Securities”) and (ii) the Secured Tower Revenue Securities, Series 2018-1, Subclass R (the “Series 2018-1R Securities” and, together with the Series 2018-1A Securities, the “2018 Securities”) issued in a securitization transaction in March 2018 (the “2018 Securitization” and, together with the 2023 Securitization, the “Trust Securitizations”) (the “Loan”) made by the Trust to American Tower Asset Sub, LLC and American Tower Asset Sub II, LLC (together, the “AMT Asset Subs”). The AMT Asset Subs are jointly and severally liable under the Loan, which is secured primarily by mortgages on the AMT Asset Subs’ interests in 5,036 broadcast and wireless communications towers and related assets (the “Trust Sites”).

The 2023 Securities correspond to components of the Loan made to the AMT Asset Subs pursuant to the Second Supplement and Amendment dated as of March 13, 2023 (the “2023 Supplement”) to the Second Amended and Restated Loan and Security Agreement dated as of March 29, 2018 (the “Loan Agreement,” which continues to govern the 2018 Securities, and collectively, the “Trust Loan Agreement”).

The 2023 Securities represent a pass-through interest in the components of the Loan corresponding to the 2023 Securities. The Series 2023-1A Securities have an interest rate of 5.490% and the Series 2023-1R Securities have an interest rate of 5.735%. The 2023 Securities have an expected life of approximately five years with a final repayment date in March 2053.

The debt service on the Loan will be paid solely from the cash flows generated from the operation of the Trust Sites held by the AMT Asset Subs. The AMT Asset Subs are required to make monthly payments of interest on the Loan. Subject to certain limited exceptions described below, no payments of principal will be required to be made on the components of the Loan corresponding to the 2023 Securities prior to the monthly payment date in March 2028, which is the anticipated repayment date for such components.

The AMT Asset Subs may prepay the Loan at any time, provided it is accompanied by applicable prepayment consideration. If the prepayment occurs within twelve months of the anticipated repayment date for the 2023 Securities, no prepayment consideration is due. The entire unpaid principal balance of the components of the Loan corresponding to the 2023 Securities will be due in March 2053.

13

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Under the Trust Loan Agreement, the AMT Asset Subs are required to maintain reserve accounts, including for ground rents, real estate and personal property taxes and insurance premiums, and, in certain circumstances, to reserve a portion of advance rents from tenants on the Trust Sites. Based on the terms of the Trust Loan Agreement, all rental cash receipts received each month are reserved for the succeeding month and held in an account controlled by the trustee and then released. The $77.7 million held in the reserve accounts as of March 31, 2023 is classified as restricted cash on the Company’s accompanying condensed consolidated balance sheet.

Repayment of 3.50% Senior Notes—On January 31, 2023, the Company repaid $1.0 billion aggregate principal amount of the 3.50% senior unsecured notes due 2023 (the “3.50% Notes”) upon their maturity. The 3.50% Notes were repaid using borrowings under the 2021 Credit Facility. Upon completion of the repayment, none of the 3.50% Notes remained outstanding.

Offering of Senior Notes

5.500% Senior Notes and 5.650% Senior Notes Offering—On March 3, 2023, the Company completed a registered public offering of $700.0 million aggregate principal amount of 5.500% senior unsecured notes due 2028 (the “5.500% Notes”) and $800.0 million aggregate principal amount of 5.650% senior unsecured notes due 2033 (the “5.650% Notes” and, together with the 5.500% Notes, the “Notes”). The net proceeds from this offering were approximately $1,480.9 million, after deducting commissions and estimated expenses. The Company used the net proceeds to repay existing indebtedness under the 2021 Multicurrency Credit Facility and the 2021 Credit Facility.

The key terms of the Notes are as follows:

Senior Notes	Aggregate Principal Amount (in millions)		Issue Date and Interest Accrual Date	Maturity Date	Contractual Interest Rate	First Interest Payment	Interest Payments Due (1)	Par Call Date (2)
5.500% Notes	$	700.0	March 3, 2023	March 15, 2028	5.500%	September 15, 2023	March 15 and September 15	February 15, 2028
5.650% Notes	$	800.0	March 3, 2023	March 15, 2033	5.650%	September 15, 2023	March 15 and September 15	December 15, 2032

___________

(1)Accrued and unpaid interest on USD denominated notes is payable in USD semi-annually in arrears and will be computed from the issue date on the basis of a 360-day year comprised of twelve 30-day months.

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

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

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

Bank Facilities

2021 Multicurrency Credit Facility—During the three months ended March 31, 2023, the Company borrowed an aggregate of $725.0 million and repaid an aggregate of $1.6 billion of revolving indebtedness under the Company’s $6.0 billion senior unsecured multicurrency revolving credit facility, as amended and restated in December 2021 (the “2021 Multicurrency Credit Facility”). The Company used the borrowings for general corporate purposes.

2021 Credit Facility—During the three months ended March 31, 2023, the Company borrowed an aggregate of $1.0 billion and repaid an aggregate of $935.0 million of revolving indebtedness under the Company’s $4.0 billion senior unsecured revolving credit facility, as amended and restated in December 2021 (the “2021 Credit Facility”). The Company used the borrowings to repay outstanding indebtedness, including the 3.50% Notes.

14

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

As of March 31, 2023, the key terms under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the Company’s $1.0 billion unsecured term loan, as amended and restated in December 2021 (the “2021 Term Loan”), the Company’s 825.0 million EUR unsecured term loan, as amended and restated in December 2021 (the “2021 EUR Three Year Delayed Draw Term Loan”) and the Company’s $1.5 billion unsecured term loan entered into in December 2021 (the “2021 USD Two Year Delayed Draw Term Loan”) were as follows:

	Outstanding Principal Balance (in millions)		Undrawn letters of credit (in millions)		Maturity Date		Current margin over LIBOR or EURIBOR (1)		Current commitment fee (2)
2021 Multicurrency Credit Facility	$	2,882.7	$	3.5	June 30, 2025	(3)	1.125	%	0.110	%
2021 Credit Facility	1,165.0		30.5		January 31, 2027	(3)	1.125	%	0.110	%
2021 Term Loan	1,000.0		N/A		January 31, 2027		1.125	%	N/A
2021 EUR Three Year Delayed Draw Term Loan	894.2		N/A		May 28, 2024		1.125	%	N/A
2021 USD Two Year Delayed Draw Term Loan	1,500.0		N/A		December 28, 2023		1.125	%	N/A

_______________

(1)London Interbank Offered Rate (“LIBOR”) applies to the USD denominated borrowings under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan and the 2021 USD Two Year Delayed Draw Term Loan. Euro Interbank Offer Rate (“EURIBOR”) applies to the EUR denominated borrowings under the 2021 Multicurrency Credit Facility and all of the borrowings under the 2021 EUR Three Year Delayed Draw Term Loan.

(2)Fee on undrawn portion of each credit facility.

(3)Subject to two optional renewal periods.

India Term Loan—On February 16, 2023, the Company entered into a 12.0 billion INR (approximately $145.1 million at the date of signing) unsecured term loan with a maturity date that is one year from the date of the first draw thereunder (the “India Term Loan”). On February 17, 2023, the Company borrowed 10.0 billion INR (approximately $120.7 million at the date of borrowing) under the India Term Loan. The India Term Loan bears interest at the three month treasury bill rate as announced by the Financial Benchmarks India Private Limited plus a margin of 1.95%. Any outstanding principal and accrued but unpaid interest will be due and payable in full at maturity. The India Term Loan does not require amortization of principal and may be paid prior to maturity in whole or in part at the Company’s option without penalty or premium.

7.    FAIR VALUE MEASUREMENTS

The Company determines the fair value of its financial instruments based on the fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Below are the three levels of inputs that may be used to measure fair value:

Level 1	Quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.
Level 2	Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3	Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

15

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Items Measured at Fair Value on a Recurring Basis—The fair values of the Company’s financial assets and liabilities that are required to be measured on a recurring basis at fair value were as follows:

	March 31, 2023					December 31, 2022
	Fair Value Measurements Using					Fair Value Measurements Using
	Level 1		Level 2		Level 3	Level 1		Level 2		Level 3
Assets:
Investments in equity securities (1)	$	30.4	—		—	$	29.2	—		—
VIL OCDs	—		$	101.6	—	—		—		—
Liabilities:
Interest rate swap agreements	—		$	3.1	—	—		$	6.2	—
Fair value of debt related to interest rate swap agreements (2)	$	(1.8)	—		—	$	(4.9)	—		—

_______________

(1)Investments in equity securities are recorded in Notes receivable and other non-current assets in the consolidated balance sheet at fair value. Unrealized holding gains and losses for equity securities are recorded in Other income (expense) in the consolidated statements of operations in the current period. During the three months ended March 31, 2023 and 2022, the Company recognized unrealized gains of $1.2 million and $9.5 million for equity securities held as of March 31, 2023.

(2)Included in the carrying values of the corresponding debt obligations.

During the three months ended March 31, 2023, the Company made no changes to the methods described in note 11 to its consolidated financial statements included in the 2022 Form 10-K that it used to measure the fair value of its interest rate swap agreements.

VIL Optionally Convertible Debentures—In February 2023, one of the Company’s customers in India, Vodafone Idea Limited (“VIL”), issued optionally convertible debentures (the “VIL OCDs”) to the Company’s subsidiary, ATC Telecom Infrastructure Private Limited (“ATC TIPL”), in exchange for VIL’s payment of certain amounts towards accounts receivables. The VIL OCDs are to be repaid by VIL with interest and ATC TIPL has the option to convert the debentures into equity of VIL. The VIL OCDs were issued for an aggregate face value of 16.0 billion INR (approximately $193.2 million on the date of issuance). The VIL OCDs mature in tranches with 8.0 billion INR (approximately $96.6 million on the date of issuance) maturing on August 27, 2023 and 8.0 billion INR (approximately $96.6 million on the date of issuance) maturing on August 27, 2024. The fair value of the VIL OCDs at issuance was approximately $116.5 million. The VIL OCDs accrue interest at a rate of 11.2% annually. Interest is payable to ATC TIPL semi-annually beginning on August 27, 2023.

The VIL OCDs are recorded in Prepaid and other current assets and Notes receivable and other non-current assets in the consolidated balance sheet at fair value. The significant input to the fair value of the VIL OCDs is the VIL equity share price underlying the instruments, less a liquidity discount. Unrealized holding gains and losses for the VIL OCDs are recorded in Other income (expense) in the consolidated statements of operations in the current period. During the three months ended March 31, 2023, the Company recognized unrealized losses of $15.7 million for the VIL OCDs held as of March 31, 2023.

 Items Measured at Fair Value on a Nonrecurring Basis

Assets Held and Used—The Company’s long-lived assets are recorded at amortized cost and, if impaired, are adjusted to fair value using Level 3 inputs. There were no material impairments during the three months ended March 31, 2023 and 2022 and there were no significant unobservable inputs used to determine fair value during the three months ended March 31, 2023 or 2022. There were no other items measured at fair value on a nonrecurring basis during the three months ended March 31, 2023 or 2022.

16

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Fair Value of Financial Instruments—The Company’s financial instruments for which the carrying value reasonably approximates fair value at March 31, 2023 and December 31, 2022 include cash and cash equivalents, restricted cash, accounts receivable and accounts payable. The Company’s estimates of fair value of its long-term obligations, including the current portion, are based primarily upon reported market values. For long-term debt not actively traded, fair value is estimated using either indicative price quotes or a discounted cash flow analysis using rates for debt with similar terms and maturities. As of March 31, 2023 and December 31, 2022, the carrying value of long-term obligations, including the current portion, was $38.5 billion and $38.7 billion, respectively. As of March 31, 2023, the fair value of long-term obligations, including the current portion, was $35.5 billion, of which $25.6 billion was measured using Level 1 inputs and $9.9 billion was measured using Level 2 inputs. As of December 31, 2022, the fair value of long-term obligations, including the current portion, was $35.1 billion, of which $24.5 billion was measured using Level 1 inputs and $10.6 billion was measured using Level 2 inputs.

8.    INCOME TAXES

The Company provides for income taxes at the end of each interim period based on the estimated effective tax rate (“ETR”) for the full fiscal year. Cumulative adjustments to the Company’s estimate are recorded in the interim period in which a change in the estimated annual ETR is determined. Under the provisions of the Internal Revenue Code of 1986, as amended, the Company may deduct amounts distributed to stockholders against the income generated by its real estate investment trust (“REIT”) operations. The Company continues to be subject to income taxes on the income of its domestic taxable REIT subsidiaries and income taxes in foreign jurisdictions where it conducts operations.

The Company provides valuation allowances if, based on the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. Management assesses the available evidence to estimate if sufficient future taxable income will be generated to use the existing deferred tax assets. Valuation allowances may be reversed if, based on changes in facts and circumstances, the net deferred tax assets have been determined to be realizable.

The increase in the income tax provision during the three months ended March 31, 2023 was primarily attributable to the reversal of valuation allowances in certain foreign jurisdictions during the three months ended March 31, 2022. The increase in the income tax provision during the three months ended March 31, 2023 was also attributable to increased earnings in certain foreign jurisdictions, offset by fewer additions to reserves for the Company’s existing tax positions during the three months ended March 31, 2023.

As of March 31, 2023 and December 31, 2022, the total unrecognized tax benefits that would impact the ETR, if recognized, were approximately $86.9 million and $103.6 million, respectively. The amount of unrecognized tax benefits during the three months ended March 31, 2023 includes (i) additions to the Company’s existing tax positions of $1.2 million, (ii) additions due to foreign currency exchange rate fluctuations of $1.2 million, (iii) reductions due to settlements of $7.5 million and (iv) reductions due to credits available against existing tax positions of $11.6 million. Unrecognized tax benefits are expected to change over the next 12 months if certain tax matters ultimately settle with the applicable taxing jurisdiction during this time frame, as described in note 12 to the Company’s consolidated financial statements included in the 2022 Form 10-K. The impact of the amount of these changes to previously recorded uncertain tax positions could range from zero to $18.0 million.

The Company recorded the following penalties and income tax-related interest expense during the three months ended March 31, 2023 and 2022:

	Three Months Ended March 31,
	2023		2022
Penalties and income tax-related interest expense	$	2.8	$	7.3

As of March 31, 2023 and December 31, 2022, the total amount of accrued income tax related interest and penalties included in the consolidated balance sheets were $43.9 million and $43.3 million, respectively.

9.    STOCK-BASED COMPENSATION

Summary of Stock-Based Compensation Plans—The Company maintains equity incentive plans that provide for the grant of stock-based awards to its directors, officers and employees. The Company’s 2007 Equity Incentive Plan, as amended (the “2007 Plan”), provides for the grant of non-qualified and incentive stock options, as well as restricted stock units, restricted stock and other stock-based awards. Exercise prices for non-qualified and incentive stock options are not less than the fair value of the underlying common stock on the date of grant. Equity awards typically vest ratably. Awards granted prior to March 10, 2023 generally vest over four years for time-based restricted stock units (“RSUs”)

17

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

and stock options. In December 2022, the Company’s Compensation Committee changed the terms of its awards to generally vest over three years. The change in vesting terms is applicable for new awards granted beginning on March 10, 2023 and does not change the vesting terms applicable to grants awarded prior to March 10, 2023. The impact of the change in vesting terms is estimated to be approximately $7.9 million for the year ended December 31, 2023. Performance-based restricted stock units (“PSUs”) generally vest over three years. Stock options generally expire ten years from the date of grant. As of March 31, 2023, the Company had the ability to grant stock-based awards with respect to an aggregate of 4.0 million shares of common stock under the 2007 Plan. In addition, the Company maintains an employee stock purchase plan (the “ESPP”) pursuant to which eligible employees may purchase shares of the Company’s common stock on the last day of each bi-annual offering period at a 15% discount from the lower of the closing market value on the first or last day of such offering period. The offering periods run from June 1 through November 30 and from December 1 through May 31 of each year.

During the three months ended March 31, 2023 and 2022, the Company recorded the following stock-based compensation expense in selling, general, administrative and development expense:

	Three Months Ended March 31,
	2023		2022
Stock-based compensation expense	$	65.5	$	56.7

Stock Options—As of March 31, 2023, there was no unrecognized compensation expense related to unvested stock options.

The Company’s option activity for the three months ended March 31, 2023 was as follows (shares disclosed in full amounts):

	Number of Options
Outstanding as of January 1, 2023	855,154
Exercised	(21,526)
Forfeited	—
Expired	—
Outstanding as of March 31, 2023	833,628

Restricted Stock Units—As of March 31, 2023, total unrecognized compensation expense related to unvested RSUs granted under the 2007 Plan was $289.3 million and is expected to be recognized over a weighted average period of approximately two years. Vesting of RSUs is subject generally to the employee’s continued employment or death, disability or qualified retirement (each as defined in the applicable RSU award agreement).

Performance-Based Restricted Stock Units—During the three months ended March 31, 2023, the Company’s Compensation Committee (the “Compensation Committee”) granted an aggregate of 118,684 PSUs (the “2023 PSUs”) to its executive officers and established the performance metrics for these awards. During the years ended December 31, 2022 and 2021, the Compensation Committee granted an aggregate of 98,542 PSUs (the “2022 PSUs”) and 98,694 PSUs (the “2021 PSUs”), respectively, to its executive officers and established the performance metrics for these awards. Threshold, target and maximum parameters were established for the metrics for a three-year performance period with respect to each of the 2023 PSUs, the 2022 PSUs and the 2021 PSUs and will be used to calculate the number of shares that will be issuable when each award vests, which may range from zero to 200% of the target amounts. At the end of each three-year performance period, the number of shares that vest will depend on the degree of achievement against the pre-established performance goals. PSUs will be paid out in common stock at the end of each performance period, subject generally to the executive’s continued employment or death, disability or qualified retirement (each as defined in the applicable PSU award agreement). PSUs will accrue dividend equivalents prior to vesting, which will be paid out only in respect of shares that actually vest.

18

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Restricted Stock Units and Performance-Based Restricted Stock Units—The Company’s RSU and PSU activity for the three months ended March 31, 2023 was as follows (shares disclosed in full amounts): 

	RSUs	PSUs
Outstanding as of January 1, 2023 (1)	1,382,879	276,468
Granted (2)	945,029	118,684
Vested and Released (3)	(511,200)	(46,850)
Forfeited	(23,247)	—
Outstanding as of March 31, 2023	1,793,461	348,302
Vested and deferred as of March 31, 2023 (4)	—	12,677

_______________

(1)PSUs consist of the target number of shares issuable at the end of the three-year performance period for the outstanding 2022 PSUs and the outstanding 2021 PSUs, or 98,542 shares and 98,694 shares, respectively, and the shares issuable at the end of the three-year performance period for the PSUs granted in 2020 (the “2020 PSUs”) based on achievement against the performance metrics for the three-year performance period, or 79,232 shares.

(2)PSUs consist of the target number of shares issuable at the end of the three-year performance period for the 2023 PSUs, or 118,684 shares.

(3)PSUs consist of shares vested pursuant to the 2020 PSUs. There are no additional shares to be earned related to the 2020 PSUs. As of March 31, 2023, 19,705 earned shares remain outstanding and will vest in May 2023.

(4)Vested and deferred PSUs are related to deferred compensation for certain former employees.

During the three months ended March 31, 2023, the Company recorded $6.8 million, respectively, in stock-based compensation expense for equity awards in which the performance goals have been established and were probable of being achieved. The remaining unrecognized compensation expense related to these awards at March 31, 2023 was $25.4 million based on the Company’s current assessment of the probability of achieving the performance goals. The weighted average period over which the cost will be recognized is approximately three years.

10.    EQUITY

Sales of Equity Securities—The Company receives proceeds from sales of its equity securities pursuant to the ESPP and upon exercise of stock options granted under the 2007 Plan. During the three months ended March 31, 2023, the Company received an aggregate of $1.8 million in proceeds upon exercises of stock options.

2020 “At the Market” Stock Offering Program—In August 2020, the Company established an “at the market” stock offering program through which it may issue and sell shares of its common stock having an aggregate gross sales price of up to $1.0 billion (the “2020 ATM Program”). Sales under the 2020 ATM Program may be made by means of ordinary brokers’ transactions on the New York Stock Exchange or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or, subject to specific instructions of the Company, at negotiated prices. The Company intends to use the net proceeds from any issuances under the 2020 ATM Program for general corporate purposes, which may include, among other things, the funding of acquisitions, additions to working capital and repayment or refinancing of existing indebtedness. As of March 31, 2023, the Company has not sold any shares of common stock under the 2020 ATM Program.

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

Under the Buyback Programs, the Company is authorized to purchase shares from time to time through open market purchases, in privately negotiated transactions not to exceed market prices, and (with respect to such open market purchases) pursuant to plans adopted in accordance with Rule 10b5-1 under the Exchange Act in accordance with securities laws and other legal requirements and subject to market conditions and other factors.

During the three months ended March 31, 2023, there were no repurchases under either of the Buyback Programs. As of March 31, 2023, the Company has repurchased a total of 14,451,325 shares of its common stock under the 2011 Buyback for an aggregate of $1.5 billion, including commissions and fees. As of March 31, 2023, the Company has not made any repurchases under the 2017 Buyback.

19

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

The Company expects to fund any further repurchases of its common stock through a combination of cash on hand, cash generated by operations and borrowings under its credit facilities. Repurchases under the Buyback Programs are subject to, among other things, the Company having available cash to fund the repurchases.

Distributions—During the three months ended March 31, 2023, the Company declared or paid the following cash distributions (per share data reflects actual amounts):

Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (1)
Common Stock
March 8, 2023	April 28, 2023	April 14, 2023	$	1.56	$	727.0
December 7, 2022	February 2, 2023	December 28, 2022	$	1.56	$	726.3

_______________

(1)Does not include amounts accrued for distributions payable related to unvested restricted stock units.

During the three months ended March 31, 2022, the Company declared or paid the following cash distributions (per share data reflects actual amounts):

Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (1)
Common Stock
March 10, 2022	April 29, 2022	April 13, 2022	$	1.40	$	638.8
December 15, 2021	January 14, 2022	December 27, 2021	$	1.39	$	633.5

_______________

(1)Does not include amounts accrued for distributions payable related to unvested restricted stock units.

The Company accrues distributions on unvested restricted stock units, which are payable upon vesting. As of March 31, 2023, the amount accrued for distributions payable related to unvested restricted stock units was $13.0 million. During the three months ended March 31, 2023 and 2022, the Company paid $6.6 million and $6.6 million of distributions upon the vesting of restricted stock units, respectively. To maintain its qualification for taxation as a REIT, the Company expects to continue paying distributions, the amount, timing and frequency of which will be determined, and subject to adjustment, by the Company’s Board of Directors.

11.    NONCONTROLLING INTERESTS

European Interests—In 2021, PGGM converted its previously held noncontrolling interest in a subsidiary that primarily consisted of the Company’s operations in France, Germany and Poland (“Former ATC Europe”) into noncontrolling interests in subsidiaries, consisting of the Company's operations in Germany and Spain. In 2021, Caisse de dépôt et placement du Québec (“CDPQ”) and Allianz insurance companies and funds managed by Allianz Capital Partners GmbH, including the Allianz European Infrastructure Fund (collectively, “Allianz”) acquired 30% and 18% noncontrolling interests, respectively, in ATC Europe (the “ATC Europe Transactions”) for total aggregate consideration of 2.6 billion EUR (approximately $3.1 billion at the date of closing).

As of March 31, 2023, ATC Europe consists of the Company’s operations in France, Germany, Poland and Spain. The Company currently holds a 52% controlling interest in ATC Europe, with CDPQ and Allianz holding 30% and 18% noncontrolling interests, respectively. ATC Europe holds a 100% interest in the subsidiaries that consist of the Company’s operations in France and Poland and an 87% and an 83% controlling interest in the subsidiaries that consist of the Company’s operations in Germany and Spain, respectively, with PGGM holding a 13% and a 17% noncontrolling interest in each respective subsidiary.

Bangladesh Partnership—In 2021, the Company acquired a 51% controlling interest in Kirtonkhola Tower Bangladesh Limited (“KTBL”) for 900 million Bangladeshi Taka (“BDT”) (approximately $10.6 million at the date of closing). Confidence Group holds a 49% noncontrolling interest in KTBL.

20

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

Stonepeak Transaction—In July 2022, the Company entered into an agreement pursuant to which certain investment vehicles affiliated with Stonepeak Partners LP (such investment vehicles, collectively, “Stonepeak”) acquired a noncontrolling ownership interest in the Company’s U.S. data center business. The transaction was completed in August 2022 for total aggregate consideration of $2.5 billion, through an investment in common equity of $1,750.0 million and mandatorily convertible preferred equity of $750.0 million. In October 2022, the Company entered into an agreement with Stonepeak for Stonepeak to acquire additional common equity and mandatorily preferred equity interests in the Company’s U.S. data center business for total aggregate consideration of $570.0 million (together with the August 2022 closing, the “Stonepeak Transaction”).

As of March 31, 2023, the Company holds a common equity interest of approximately 72% in its U.S. data center business, with Stonepeak holding approximately 28% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity. On a fully converted basis, which is expected to occur four years from the date of closing in August 2022, and on the basis of the currently outstanding equity, the Company will hold a controlling ownership interest of approximately 64%, with Stonepeak holding approximately 36%. The mandatorily convertible preferred equity, which accrues dividends at 5.0%, will convert into common equity on a one for one basis, subject to adjustment that will be measured on the conversion date.

Dividends to noncontrolling interests—Certain of the Company’s subsidiaries may, from time to time, declare dividends. During the three months ended March 31, 2023, the Company’s U.S. data center business had distributions of $11.4 million related to the outstanding Stonepeak mandatorily convertible preferred equity (the “Stonepeak Preferred Distributions”). As of March 31, 2023, the amount accrued for Stonepeak Preferred Distributions was $11.4 million.

The changes in noncontrolling interests were as follows:

	Three Months Ended March 31,
	2023		2022
Balance as of January 1,	$	6,836.1	$	3,988.4
Net loss attributable to noncontrolling interests	(20.8)		(9.0)
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	39.9		(91.5)
Distributions to noncontrolling interest holders (1)	(11.5)		(0.2)
Balance as of March 31,	$	6,843.7	$	3,887.7

_______________

(1)For the three months ended March 31, 2023, primarily includes $11.4 million of Stonepeak Preferred Distributions.

12.    EARNINGS PER COMMON SHARE

The following table sets forth basic and diluted net income per common share computational data (shares in thousands, except per share data):

	Three Months Ended March 31,
	2023		2022
Net income attributable to American Tower Corporation common stockholders	$	335.8	$	711.7
Basic weighted average common shares outstanding	465,741		455,946
Dilutive securities	1,069		1,265
Diluted weighted average common shares outstanding	466,810		457,211
Basic net income attributable to American Tower Corporation common stockholders per common share	$	0.72	$	1.56
Diluted net income attributable to American Tower Corporation common stockholders per common share	$	0.72	$	1.56

Shares Excluded From Dilutive Effect—The following shares were not included in the computation of diluted earnings per share because the effect would be anti-dilutive (in thousands, on a weighted average basis):

	Three Months Ended March 31,
	2023	2022
Restricted stock units	5	106

21

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

13.    COMMITMENTS AND CONTINGENCIES

Litigation—The Company periodically becomes involved in various claims, lawsuits and proceedings that are incidental to its business. In the opinion of Company management, after consultation with counsel, there are no matters currently pending that would, in the event of an adverse outcome, materially impact the Company’s consolidated financial position, results of operations or liquidity.

Verizon Transaction—In March 2015, the Company entered into an agreement with various operating entities of Verizon Communications Inc. (“Verizon”) that currently provides for the lease, sublease or management of approximately 11,250 wireless communications sites commencing March 27, 2015. The average term of the lease or sublease for all communications sites at the inception of the agreement was approximately 28 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the leased sites in tranches, subject to the applicable lease, sublease or management rights upon its scheduled expiration. Each tower is assigned to an annual tranche, ranging from 2034 to 2047, which represents the outside expiration date for the sublease rights to the towers in that tranche. The purchase price for each tranche is a fixed amount stated in the lease for such tranche plus the fair market value of certain alterations made to the related towers. The aggregate purchase option price for the towers leased and subleased is approximately $5.0 billion. Verizon will occupy the sites as a tenant for an initial term of ten years with eight optional successive five-year terms, each of which is governed by standard master lease agreement terms established as a part of the transaction.

AT&T Transaction—The Company has an agreement with SBC Communications Inc., a predecessor entity to AT&T Inc. (“AT&T”), that currently provides for the lease or sublease of approximately 1,900 towers commencing between December 2000 and August 2004. Substantially all of the towers are part of the Trust Securitizations. The average term of the lease or sublease for all communications sites at the inception of the agreement was approximately 27 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the sites subject to the applicable lease or sublease upon its expiration. Each tower is assigned to an annual tranche, ranging from 2013 to 2032, which represents the outside expiration date for the sublease rights to that tower. The purchase price for each site is a fixed amount stated in the lease for that site plus the fair market value of certain alterations made to the related tower by AT&T. As of March 31, 2023, the Company has purchased an aggregate of approximately 500 of the subleased towers which are subject to the applicable agreement. The aggregate purchase option price for the remaining towers leased and subleased is $1.1 billion and includes per annum accretion through the applicable expiration of the lease or sublease of a site. For all these sites, AT&T has the right to continue to lease the reserved space through June 30, 2025 at the then-current monthly fee, which will escalate in accordance with the standard master lease agreement for the remainder of AT&T’s tenancy. Thereafter, AT&T has the right to renew the lease for up to five successive five-year terms.

Other Contingencies—The Company is subject to income tax and other taxes in the geographic areas where it holds assets or operates, and periodically receives notifications of audits, assessments or other actions by taxing authorities. Taxing authorities may issue notices or assessments while audits are being conducted. In certain jurisdictions, taxing authorities may issue assessments with minimal examination. These notices and assessments do not represent amounts that the Company is obligated to pay and are often not reflective of the actual tax liability for which the Company will ultimately be liable. In the process of responding to assessments of taxes that the Company believes are not enforceable, the Company avails itself of both administrative and judicial remedies. The Company evaluates the circumstances of each notification or assessment based on the information available and, in those instances in which the Company does not anticipate a successful defense of positions taken in its tax filings, a liability is recorded in the appropriate amount based on the underlying assessment.

22

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

14.    ACQUISITIONS

Impact of current year acquisitions—The Company typically acquires communications sites and other communications infrastructure assets from wireless carriers or other tower operators and subsequently integrates those sites and related assets into its existing portfolio of communications sites and related assets. In the United States, acquisitions may also include data center facilities and related assets. The financial results of the Company’s acquisitions have been included in the Company’s consolidated statements of operations for the three months ended March 31, 2023 from the date of the respective acquisition. The date of acquisition, and by extension the point at which the Company begins to recognize the results of an acquisition, may depend on, among other things, the receipt of contractual consents, the commencement and extent of leasing arrangements and the timing of the transfer of title or rights to the assets, which may be accomplished in phases. Communications sites acquired from communications service providers may never have been operated as a business and may instead have been utilized solely by the seller as a component of its network infrastructure. An acquisition may or may not involve the transfer of business operations or employees.

The Company evaluates each of its acquisitions under the accounting guidance framework to determine whether to treat an acquisition as an asset acquisition or a business combination. For those transactions treated as asset acquisitions, the purchase price is allocated to the assets acquired, with no recognition of goodwill.

For those acquisitions accounted for as business combinations, the Company recognizes acquisition and merger related expenses in the period in which they are incurred and services are received; for transactions accounted for as asset acquisitions, these costs are capitalized as part of the purchase price. Acquisition and merger related costs may include finder’s fees, advisory, legal, accounting, valuation and other professional or consulting fees and general administrative costs directly related to completing the transaction. Integration costs include incremental and non-recurring costs necessary to convert data and systems, retain employees and otherwise enable the Company to operate acquired businesses or assets efficiently. The Company records acquisition and merger related expenses for business combinations, as well as integration costs for all acquisitions, in Other operating expenses in the consolidated statements of operations.

During the three months ended March 31, 2023 and 2022, the Company recorded acquisition and merger related expenses for business combinations and non-capitalized asset acquisition costs and integration costs as follows:

	Three Months Ended March 31,
	2023		2022
Acquisition and merger related expenses	$	5.0	$	5.7
Integration costs	$	2.6	$	10.0

During the three months ended March 31, 2022, the Company also recorded benefits of $1.6 million, related to pre-acquisition contingencies and settlements.

2023 Transactions

The estimated aggregate impact of the acquisitions completed in 2023 on the Company’s revenues and gross margin for the three months ended March 31, 2023 was not material to the Company’s operating results.

Other Acquisitions—During the three months ended March 31, 2023, the Company acquired a total of 8 communications sites, as well as other communications infrastructure assets, in the United States, Canada, Poland and Spain for an aggregate purchase price of $17.5 million. Of the aggregate purchase price, $8.4 million is reflected as a payable in the consolidated balance sheet as of March 31, 2023. These acquisitions were accounted for as asset acquisitions.

23

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

The following table summarizes the allocations of the purchase prices for the fiscal year 2023 acquisitions based upon their estimated fair value at the date of acquisition:

	Other
Current assets	$	1.5
Property and equipment	7.5
Intangible assets (1):
Tenant-related intangible assets	8.0
Network location intangible assets	0.8
Other non-current assets	0.8
Current liabilities	(0.2)
Other non-current liabilities	(0.9)
Net assets acquired	17.5
Fair value of net assets acquired	17.5
Purchase price	$	17.5

_______________

(1)Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis over the estimated useful lives of the assets.

15.    BUSINESS SEGMENTS

Property

Communications Sites and Related Communications Infrastructure—The Company’s primary business is leasing space on multitenant communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. The Company has historically reported these operations on a geographic basis.

Data Centers—The Company’s Data Centers segment relates to data center facilities and related assets that the Company owns and operates in the United States. The Data Centers segment offers different types of leased spaces and related services from, and requires different resources, skill sets and marketing strategies than, the existing property operating segment in the U.S. & Canada.

As of March 31, 2023, the Company’s property operations consisted of the following:

•U.S. & Canada: property operations in Canada and the United States;

•Asia-Pacific: property operations in Australia, Bangladesh, India, New Zealand and the Philippines;

•Africa: property operations in Burkina Faso, Ghana, Kenya, Niger, Nigeria, South Africa and Uganda;

•Europe: property operations in France, Germany, Poland and Spain;

•Latin America: property operations in Argentina, Brazil, Chile, Colombia, Costa Rica, Mexico, Paraguay and Peru; and

•Data Centers: data center property operations in the United States.

Services—The Company’s Services segment offers tower-related services in the United States, including AZP, structural analysis and construction management, which primarily support its site leasing business, including the addition of new tenants and equipment on its communications sites. The Services segment is a strategic business unit that offers different services from, and requires different resources, skill sets and marketing strategies than, the property operating segments.

The accounting policies applied in compiling segment information below are similar to those described in note 1 to the Company’s consolidated financial statements included in the 2022 Form 10-K and as updated in note 1 above. Among other factors, in evaluating financial performance in each business segment, management uses segment gross margin and segment operating profit. The Company defines segment gross margin as segment revenue less segment operating expenses excluding Depreciation, amortization and accretion; Selling, general, administrative and development expense; and Other operating expenses. The Company defines segment operating profit as segment gross margin less Selling, general, administrative and development expense attributable to the segment, excluding stock-based compensation expense and corporate expenses. These measures of segment gross margin and segment operating profit are also before Interest income, Interest expense, Gain (loss) on retirement of long-term obligations, Other income (expense), Net income (loss) attributable to noncontrolling interests and Income tax benefit (provision). The categories of expenses

24

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

indicated above, such as depreciation, have been excluded from segment operating performance as they are not considered in the review of information or the evaluation of results by management. There are no significant revenues resulting from transactions between the Company’s operating segments. All intercompany transactions are eliminated to reconcile segment results and assets to the consolidated statements of operations and consolidated balance sheets.

Summarized financial information concerning the Company’s reportable segments for the three months ended March 31, 2023 and 2022 is shown in the following tables. The “Other” column (i) represents amounts excluded from specific segments, such as business development operations, stock-based compensation expense and corporate expenses included in Selling, general, administrative and development expense; Other operating expenses; Interest income; Interest expense; Gain (loss) on retirement of long-term obligations; and Other income (expense), and (ii) reconciles segment operating profit to Income from continuing operations before income taxes.

	Property												Total  Property		Services		Other		Total
Three Months Ended March 31, 2023	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,287.6	$	251.1	$	317.0	$	191.7	$	464.1	$	203.0	$	2,714.5	$	52.7			$	2,767.2
Segment operating expenses	205.3		168.4		118.5		73.1		137.9		83.8		787.0		19.1				806.1
Segment gross margin	1,082.3		82.7		198.5		118.6		326.2		119.2		1,927.5		33.6				1,961.1
Segment selling, general, administrative and development expense (1)	40.8		8.8		21.4		14.6		29.7		17.5		132.8		5.7				138.5
Segment operating profit	$	1,041.5	$	73.9	$	177.1	$	104.0	$	296.5	$	101.7	$	1,794.7	$	27.9			$	1,822.6
Stock-based compensation expense																	$	65.5	65.5
Other selling, general, administrative and development expense																	59.9		59.9
Depreciation, amortization and accretion																	794.1		794.1
Other expense (2)																	534.7		534.7
Income from continuing operations before income taxes																			$	368.4
Total assets	$	26,657.4	$	3,879.7	$	4,632.4	$	11,609.5	$	8,741.0	$	10,632.5	$	66,152.5	$	125.2	$	540.0	$	66,817.7

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $65.5 million.

(2)Primarily includes interest expense and losses from foreign currency exchange rate fluctuations. Three months ended March 31, 2023 also includes a loss on the sale of Mexico Fiber of $80.0 million and $29.8 million in impairment charges.

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(tabular amounts in millions, unless otherwise noted)

	Property												Total  Property		Services		Other		Total
Three Months Ended March 31, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,232.4	$	298.5	$	267.8	$	198.5	$	419.3	$	184.3	$	2,600.8	$	59.5			$	2,660.3
Segment operating expenses	199.8		175.1		97.7		92.3		130.0		76.6		771.5		27.9				799.4
Segment gross margin	1,032.6		123.4		170.1		106.2		289.3		107.7		1,829.3		31.6				1,860.9
Segment selling, general, administrative and development expense (1)	42.8		47.9		22.5		14.9		28.8		16.4		173.3		6.0				179.3
Segment operating profit	$	989.8	$	75.5	$	147.6	$	91.3	$	260.5	$	91.3	$	1,656.0	$	25.6			$	1,681.6
Stock-based compensation expense																	$	56.7	56.7
Other selling, general, administrative and development expense																	57.9		57.9
Depreciation, amortization and accretion																	815.8		815.8
Other expense (2)																	26.0		26.0
Income from continuing operations before income taxes																			$	725.2
Total assets	$	27,247.9	$	5,102.1	$	4,894.0	$	11,741.3	$	9,136.0	$	10,996.2	$	69,117.5	$	86.3	$	559.7	$	69,763.5

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $56.7 million.

(2)Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations.

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ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

This Quarterly Report on Form 10-Q (this “Quarterly Report”) contains statements about future events and expectations, or forward-looking statements, relating to our goals, beliefs, strategies, plans or current expectations and other statements that are not of historical facts. For example, when we use words such as “project,” “plan,” “believe,” “anticipate,” “expect,” “forecast,” “estimate,” “intend,” “should,” “would,” “could,” “may” or other words that convey uncertainty of future events or outcomes, we are making forward-looking statements. Certain important factors may cause actual results to differ materially from those indicated by our forward-looking statements, including those set forth under the caption “Risk Factors” in Part I, Item 1A of our Annual Report on Form 10-K for the year ended December 31, 2022 (the “2022 Form 10-K”). Forward-looking statements represent management’s current expectations, beliefs and assumptions, and are inherently uncertain. We do not undertake any obligation to update forward-looking statements made by us.

The discussion and analysis of our financial condition and results of operations that follow are based upon our consolidated and condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”). The preparation of our financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses, and the related disclosure of contingent assets and liabilities at the date of our financial statements. Actual results may differ from these estimates and such differences could be material to the financial statements. This discussion should be read in conjunction with our consolidated and condensed consolidated financial statements herein and the accompanying notes, information set forth under the caption “Critical Accounting Policies and Estimates” in the 2022 Form 10-K, and in particular, the information set forth therein under Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Overview

We are one of the largest global real estate investment trusts and a leading independent owner, operator and developer of multitenant communications real estate. Our primary business is the leasing of space on communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. In addition to the communications sites in our portfolio, we manage rooftop and tower sites for property owners under various contractual arrangements. We also hold other telecommunications infrastructure, fiber and property interests that we lease primarily to communications service providers and third-party tower operators, and, as discussed further below, we hold a portfolio of highly interconnected data center facilities and related assets in the United States. Our customers include our tenants, licensees and other payers. We refer to the business encompassing the above as our property operations, which accounted for 98% of our total revenues for the three months ended March 31, 2023 and includes our U.S. & Canada property, Asia-Pacific property, Africa property, Europe property and Latin America property segments and Data Centers segment.

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

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The following table details the number of communications sites, excluding managed sites, that we owned or operated as of March 31, 2023: 

	Number of Owned Towers	Number of Operated  Towers (1)	Number of Owned DAS Sites
U.S. & Canada:
Canada	220	—	—
United States	27,385	15,168	456
U.S. & Canada total	27,605	15,168	456
Asia-Pacific: (2)
Bangladesh	487	—	—
India	77,472	—	820
Philippines	346	—	—
Asia-Pacific total	78,305	—	820
Africa:
Burkina Faso	726	—	—
Ghana	3,503	657	36
Kenya	3,536	—	9
Niger	902	—	—
Nigeria	7,698	—	—
South Africa	2,861	—	—
Uganda	4,100	—	12
Africa total	23,326	657	57
Europe:
France	3,952	303	8
Germany	14,818	—	—
Poland	62	—	—
Spain	11,662	—	1
Europe total	30,494	303	9
Latin America:
Argentina	498	—	11
Brazil	20,635	2,040	122
Chile	3,721	—	138
Colombia	4,973	—	6
Costa Rica	700	—	2
Mexico	9,566	186	92
Paraguay	1,447	—	—
Peru	3,949	450	1
Latin America total	45,489	2,676	372

_______________

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

(2)We also control land under carrier or other third-party communications sites in Australia and New Zealand, which provide recurring cash flows through tenant leasing arrangements.

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As of March 31, 2023, our property portfolio included 28 operating data center facilities across ten markets in the United States that collectively comprise approximately 3.1 million net rentable square feet (“NRSF”) of data center space, as detailed below:

	Number of Data Centers	Total NRSF (1)
		(in thousands)
San Francisco Bay, CA	8	940
Los Angeles, CA	3	670
Northern Virginia, VA	5	586
New York, NY	2	250
Chicago, IL	2	216
Boston, MA	1	143
Denver, CO	2	35
Miami, FL	2	50
Orlando, FL	1	126
Atlanta, GA	2	95
Total	28	3,111

_______________

(1)Excludes approximately 0.4 million of office and light industrial NRSF.

We operate in seven reportable segments: U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property, Data Centers and Services. In evaluating operating performance in each business segment, management uses, among other factors, segment gross margin and segment operating profit (see note 15 to our consolidated and condensed consolidated financial statements included in this Quarterly Report).

Sale of Mexico Fiber— On March 29, 2023, we completed the sale of one of our subsidiaries in Mexico that held fiber assets (“Mexico Fiber”). Prior to the divestiture, Mexico Fiber’s operating results were included within the Latin America property segment.

The 2022 Form 10-K contains information regarding management’s expectations of long-term drivers of demand for our communications sites, as well as key trends, which management believes provide valuable insight into our operating and financial resource allocation decisions. The discussion below should be read in conjunction with the 2022 Form 10-K and, in particular, the information set forth therein under Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Executive Overview.”

In most of our markets, our tenant leases for our communications sites with wireless carriers generally have initial non-cancellable terms of five to ten years with multiple renewal terms. Accordingly, the vast majority of the revenue generated by our property operations during the three months ended March 31, 2023 was recurring revenue that we should continue to receive in future periods. Most of our tenant leases for our communications sites have provisions that periodically increase the rent due under the lease, typically based on an annual fixed escalation (averaging approximately 3% in the United States) or an inflationary index in most of our international markets, or a combination of both. In addition, certain of our tenant leases provide for additional revenue primarily to cover costs (pass-through revenue), such as ground rent or power and fuel costs.

Based upon existing customer leases and foreign currency exchange rates as of March 31, 2023, we expect to generate nearly $63 billion of non-cancellable customer lease revenue over future periods, before the impact of straight-line lease accounting.

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Following the rulings by the Supreme Court of India regarding carriers’ obligations for the adjusted gross revenue (“AGR”) fees and charges prescribed by the court, we continue to experience variability and a level of uncertainty in collections in India. As further discussed in Item 1A of the 2022 Form 10-K under the caption “Risk Factors—A substantial portion of our current and projected future revenue is derived from a small number of customers, and we are sensitive to adverse changes in the creditworthiness and financial strength of our customers,” in the third quarter of 2022, our largest customer in India, Vodafone Idea Limited (“VIL”), communicated that it would make partial payments of its contractual amounts owed to us and indicated that it would continue to make partial payments for the remainder of 2022. In late 2022, VIL had communicated its intent to resume payments in full under its contractual obligations owed to us beginning on January 1, 2023. However, in early 2023, VIL communicated that it would not be able to resume payments in full of its contractual obligations owed to us, and that it would instead continue to make partial payments (the “VIL Shortfall”).

We considered these recent developments and the uncertainty with respect to amounts owed under our tenant leases when conducting our 2022 annual impairment assessments for long-lived assets and goodwill in India. As a result, we determined that certain fixed and intangible assets had been impaired during the year ended December 31, 2022. We expect to periodically evaluate the carrying value of our Indian assets, which may result in the realization of additional impairment expense or other similar charges. For more information, please see our discussion below under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates” included in this Quarterly Report.

In February 2023, VIL issued optionally convertible debentures (the “VIL OCDs”) to our subsidiary, ATC Telecom Infrastructure Private Limited (“ATC TIPL”), in exchange for VIL’s payment of certain amounts towards accounts receivables. The convertible debentures are to be repaid by VIL with interest and ATC TIPL has the option to convert the debentures into equity of VIL. The VIL OCDs were issued for an aggregate face value of 16.0 billion Indian Rupees (“INR”) (approximately $193.2 million on the date of issuance). The fair value of the VIL OCDs at issuance was approximately $116.5 million.

As a result of the challenging business environment in India, we are exploring various strategic alternatives aimed at potentially reducing our exposure there, including the sale of equity interests in our India operations to one or more private investors. Any such completed transaction could have a material impact on our financial statements and on our results of operations in the period in which any such transaction occurred. There can be no assurance that any such

strategic alternative will be implemented and, if so implemented, as to the timing thereof, and any such proposed transaction would be subject to conditions, including regulatory approvals in India.

The revenues generated by our property operations may be affected by cancellations of existing tenant leases. As discussed above, most of our tenant leases with wireless carriers and broadcasters are multiyear contracts, which typically are non-cancellable; however, in some instances, a lease may be cancelled upon the payment of a termination fee. Revenue lost from either tenant lease cancellations or the non-renewal of leases or rent renegotiations, which we refer to as churn, has historically not had a material adverse effect on the revenues generated by our consolidated property operations. During the three months ended March 31, 2023, churn was approximately 3% of our tenant billings, primarily driven by churn in our U.S. & Canada property segment, as discussed below.

We expect that our churn rate in our U.S. & Canada property segment will remain elevated for a period of several years through 2025 due to contractual lease cancellations and non-renewals by T-Mobile, including legacy Sprint Corporation leases, pursuant to the terms of our master lease agreement with T-Mobile US, Inc. (the “T-Mobile MLA”) entered into in September 2020.

We will continue to actively monitor the ongoing coronavirus pandemic and may take further actions as may be required by governmental authorities or that we determine are in the best interests of our employees, customers and business partners.

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Non-GAAP Financial Measures

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

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

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

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

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

Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO and AFFO (common stockholders) are not intended to replace net income or any other performance measures determined in accordance with GAAP. None of Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO or AFFO (common stockholders) represents cash flows from operating activities in accordance with GAAP and, therefore, these measures should not be considered indicative of cash flows from operating activities, as a measure of liquidity or a measure of funds available to fund our cash needs, including our ability to make cash distributions. Rather, Adjusted EBITDA, Nareit FFO (common stockholders), Consolidated AFFO and AFFO (common stockholders) are presented as we believe each is a useful indicator of our current operating performance. We believe that these metrics are useful to an investor in evaluating our operating performance because (1) each is a key measure used by our management team for decision making purposes and for evaluating our operating segments’ performance; (2) Adjusted EBITDA is a component underlying our credit ratings; (3) Adjusted EBITDA is widely used in the telecommunications real estate sector to measure operating performance as depreciation, amortization and accretion may vary significantly among companies depending upon accounting methods and useful lives, particularly where acquisitions and non-operating factors are involved; (4) Consolidated AFFO and AFFO (common stockholders) are widely used in the telecommunications real estate sector to adjust Nareit FFO (common stockholders) for items that may otherwise cause material fluctuations in Nareit FFO (common stockholders) growth from period to period that would not be representative of the underlying performance of property assets in those periods; (5) each provides investors with a meaningful measure for evaluating our period-to-period operating performance by eliminating items that are not operational in nature; and (6) each provides investors with a measure for comparing our results of operations to those of other companies, particularly those in our industry.

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

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Results of Operations

Three Months Ended March 31, 2023 and 2022

(in millions, except percentages)

Revenue

	Three Months Ended March 31,				Percent Increase (Decrease)
	2023		2022
Property
U.S. & Canada	$	1,287.6	$	1,232.4	4	%
Asia-Pacific	251.1		298.5		(16)
Africa	317.0		267.8		18
Europe	191.7		198.5		(3)
Latin America	464.1		419.3		11
Data Centers	203.0		184.3		10
Total property	2,714.5		2,600.8		4
Services	52.7		59.5		(11)
Total revenues	$	2,767.2	$	2,660.3	4	%

Three Months Ended March 31, 2023

U.S. & Canada property segment revenue growth of $55.2 million was attributable to:

• Tenant billings growth of $60.0 million, which was driven by:

• $59.9 million due to leasing additional space on our sites (“colocations”) and amendments; and

• $4.2 million from contractual escalations, net of churn;

• Partially offset by:

• A decrease of $2.2 million from other tenant billings; and

• A decrease of $1.9 million generated from newly acquired or constructed sites, which includes the impact of the disposition of certain operations acquired in connection with our acquisition of InSite Wireless Group, LLC;

• Partially offset by a decrease of $4.6 million in other revenue, which included a $6.0 million decrease due to straight-line accounting.

Segment revenue growth included a decrease of $0.2 million attributable to the negative impact of foreign currency translation related to fluctuations in Canadian Dollar.

Asia-Pacific property segment revenue decrease of $47.4 million was attributable to:

• A decrease of $22.0 million in other revenue, primarily due to revenue reserves of $20.8 million related to the VIL Shortfall (as discussed above), as compared to the prior-year period, which included net recoveries of reserves; and

• A decrease of $13.1 million in pass-through revenue, primarily due to revenue reserves of $14.1 million related to the VIL Shortfall;

• Partially offset by tenant billings growth of $11.6 million, which was driven by:

• $9.8 million due to colocations and amendments;

• $6.0 million generated from newly acquired or constructed sites; and

• $0.1 million from other tenant billings;

• Partially offset by a decrease of $4.3 million resulting from churn in excess of contractual escalations.

Segment revenue decline included a decrease of $23.9 million attributable to the negative impact of foreign currency translation related to fluctuations in INR.

32

Africa property segment revenue growth of $49.2 million was attributable to:

• An increase of $59.8 million in pass-through revenue, primarily due to an increase in fuel prices;

• Tenant billings growth of $33.1 million, which was driven by:

• $13.2 million due to colocations and amendments;

• $9.9 million resulting from contractual escalations, net of churn;

• $9.6 million generated from newly acquired or constructed sites; and

• $0.4 million from other tenant billings; and

• An increase of $2.2 million in other revenue.

Segment revenue growth included a decrease of $45.9 million, attributable to the impact of foreign currency translation, which included, among others, negative impacts of $23.9 million related to fluctuations in Ghanaian Cedi, $9.9 million related to fluctuations in Nigerian Naira, $5.9 million related to fluctuations in South African Rand and $3.0 million related to fluctuations in Kenyan Shilling.

Europe property segment revenue decrease of $6.8 million was attributable to:

• A decrease of $16.8 million in pass-through revenue, primarily due to a decrease in energy costs;

• Partially offset by an increase of $6.3 million in other revenue, primarily attributable to our Spain fiber business acquired in the second quarter of 2022, and tenant billings growth of $12.7 million, which was driven by:

• $6.9 million resulting from contractual escalations, net of churn;

• $3.4 million due to colocations and amendments; and

• $2.6 million generated from newly acquired or constructed sites;

• Partially offset by a decrease of $0.2 million from other tenant billings.

Segment revenue growth included a decrease of $9.0 million primarily attributable to the negative impact of foreign currency translation related to fluctuations in Euro (“EUR”).

Latin America property segment revenue growth of $44.8 million was attributable to:

• Tenant billings growth of $16.8 million, which was driven by:

• $8.4 million due to colocations and amendments;

• $7.7 million from contractual escalations, net of churn; and

• $0.7 million generated from newly acquired or constructed sites;

• An increase of $8.6 million in other revenue, primarily due to a decrease in revenue reserves; and

• An increase of $6.9 million in pass-through revenue, primarily attributable to increased pass-through ground rent costs in Brazil.

Segment revenue growth included an increase of $12.5 million, attributable to the impact of foreign currency translation, which included, among others, positive impacts of $15.3 million related to fluctuations in Mexican Peso and $3.1 million related to fluctuations in Brazilian Real, partially offset by negative impacts of $5.6 million related to fluctuations in Colombian Peso.

Data Centers segment revenue growth of $18.7 million was attributable to:

•An increase of $8.9 million in rental, related and other revenue primarily due to new lease commencements, customer expansions and rent increases upon customer renewals;

•An increase of $6.3 million in power revenue from new lease commencements, increased power consumption and pricing increases from existing customers;

•An increase of $2.3 million in interconnection revenue; and

•An increase of $1.2 million in straight-line revenue.

Services segment revenue decrease of $6.8 million was primarily attributable to a decrease in site application, zoning and permitting and structural analysis services, partially offset by an increase in construction management services.

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Gross Margin

	Three Months Ended March 31,				Percent Increase (Decrease)
	2023		2022
Property
U.S. & Canada	$	1,082.3	$	1,032.6	5	%
Asia-Pacific	82.7		123.4		(33)
Africa	198.5		170.1		17
Europe	118.6		106.2		12
Latin America	326.2		289.3		13
Data Centers	119.2		107.7		11
Total property	1,927.5		1,829.3		5
Services	33.6		31.6		6	%

Three Months Ended March 31, 2023

•The increase in U.S. & Canada property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $5.5 million.

•The decrease in Asia-Pacific property segment gross margin was primarily attributable to the decrease in revenue described above and an increase in direct expenses of $9.3 million, primarily due to an increase in costs associated with pass-through revenue, including fuel costs. Direct expenses also benefited by $16.0 million from the impact of foreign currency translation.

•The increase in Africa property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $40.9 million, primarily due to an increase in costs associated with pass-through revenue, including fuel costs. Direct expenses also benefited by $20.1 million from the impact of foreign currency translation.

•The increase in Europe property segment gross margin was primarily attributable to a decrease in direct expenses of $15.8 million, primarily due to a decrease in energy costs associated with pass-through revenue, partially offset by the decrease in revenue described above. Direct expenses also benefited by $3.4 million from the impact of foreign currency translation.

•The increase in Latin America property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $6.6 million, primarily due to an increase in costs associated with pass-through revenue, including land rent costs. Direct expenses were also negatively impacted by $1.3 million from the impact of foreign currency translation.

•The increase in Data Centers segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $7.2 million.

•The increase in Services segment gross margin was primarily due to a decrease in direct expenses of $8.8 million, partially offset by the decrease in revenue described above.

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

	Three Months Ended March 31,				Percent Increase (Decrease)
	2023		2022
Property
U.S. & Canada	$	40.8	$	42.8	(5)	%
Asia-Pacific	8.8		47.9		(82)
Africa	21.4		22.5		(5)
Europe	14.6		14.9		(2)
Latin America	29.7		28.8		3
Data Centers	17.5		16.4		7
Total property	132.8		173.3		(23)
Services	5.7		6.0		(5)
Other	125.4		114.6		9
Total selling, general, administrative and development expense	$	263.9	$	293.9	(10)	%

Three Months Ended March 31, 2023

•The decrease in our U.S. & Canada property segment SG&A was primarily driven by decreased personnel costs to support our business.

•The decrease in our Asia-Pacific property segment SG&A was primarily driven by a net decrease in bad debt expense of $35.3 million. For the three months ended March 31, 2023, the impact of the VIL Shortfall is reflected in revenue reserves as described above.

•The decrease in our Africa property segment SG&A was primarily driven by lower canceled construction costs and a benefit from the impact of foreign currency translation, partially offset by an increase in bad debt expense.

•Our Europe and Latin America property segment SG&A and Services segment SG&A were relatively consistent as compared to the prior-year period.

•The increase in our Data Centers segment SG&A was primarily driven by increased personnel costs to support our business.

•The increase in other SG&A was primarily attributable to an increase in stock-based compensation expense of $8.8 million.

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Operating Profit

	Three Months Ended March 31,				Percent Increase (Decrease)
	2023		2022
Property
U.S. & Canada	$	1,041.5	$	989.8	5	%
Asia-Pacific	73.9		75.5		(2)
Africa	177.1		147.6		20
Europe	104.0		91.3		14
Latin America	296.5		260.5		14
Data Centers	101.7		91.3		11
Total property	1,794.7		1,656.0		8
Services	27.9		25.6		9	%

Three Months Ended March 31, 2023

•The increases in operating profit for the three months ended March 31, 2023 for our U.S. & Canada, Africa and Europe property segments and our Services segment were primarily attributable to increases in our segment gross margin and decreases in our segment SG&A.

•The decrease in operating profit for the three months ended March 31, 2023 for our Asia-Pacific property segment was primarily attributable to a decrease in our segment gross margin, partially offset by a decrease in our segment SG&A.

•The increases in operating profit for the three months ended March 31, 2023 for our Latin America property segment and our Data Centers segment were primarily attributable to increases in our segment gross margin, partially offset by increases in our segment SG&A.

Depreciation, Amortization and Accretion

	Three Months Ended March 31,				Percent Increase (Decrease)
	2023		2022
Depreciation, amortization and accretion	$	794.1	$	815.8	(3)	%

The decrease in depreciation, amortization and accretion expense for the three months ended March 31, 2023 was primarily attributable to a decrease in property and equipment and intangible assets subject to amortization as a result of impairments taken since the beginning of the prior-year period.

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Other Operating Expenses

	Three Months Ended March 31,				Percent Increase (Decrease)
	2023		2022
Other operating expenses	$	127.5	$	26.1	389	%

The increase in other operating expenses during the three months ended March 31, 2023 was primarily attributable to a loss on the sale of Mexico Fiber of $80.0 million and an increase in impairment charges of $24.0 million, partially offset by a decrease in integration and acquisition related costs, including pre-acquisition contingencies and settlements, of $6.5 million.

Total Other Expense (Income)

	Three Months Ended March 31,				Percent Increase (Decrease)
	2023		2022
Total other expense (income)	$	407.2	$	(0.1)	(407,300)	%

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

The change in total other expense (income) during the three months ended March 31, 2023 was primarily due to foreign currency losses of $84.1 million in the current period, as compared to foreign currency gains of $242.1 million in the prior-year period and an increase in net interest expense of $56.9 million, primarily due to an increase in our weighted average interest rate. Total other expense (income) for the three months ended March 31, 2023 also includes an unrealized loss of $15.7 million related to the VIL OCDs held as of March 31, 2023.

Income Tax Provision

	Three Months Ended March 31,						Percent Increase (Decrease)
	2023			2022
Income tax provision	$	53.4		$	22.5		137	%
Effective tax rate	14.5		%	3.1		%

As a real estate investment trust for U.S. federal income tax purposes (“REIT”), we may deduct earnings distributed to stockholders against the income generated by our REIT operations. Consequently, the effective tax rate on income from continuing operations for the three months ended March 31, 2023 and 2022 differs from the federal statutory rate.

The increase in the income tax provision during the three months ended March 31, 2023 was primarily attributable to the reversal of valuation allowances in certain foreign jurisdictions during the three months ended March 31, 2022. The increase in the income tax provision during the three months ended March 31, 2023 was also attributable to increased earnings in certain foreign jurisdictions, offset by fewer additions to reserves for our existing tax positions during the three months ended March 31, 2023.

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

	Three Months Ended March 31,				Percent Increase (Decrease)
	2023		2022
Net income	$	315.0	$	702.7	(55)	%
Income tax provision	53.4		22.5		137
Other expense (income)	97.8		(252.6)		(139)
Interest expense	340.2		262.4		30
Interest income	(30.8)		(9.9)		211
Other operating expenses	127.5		26.1		389
Depreciation, amortization and accretion	794.1		815.8		(3)
Stock-based compensation expense	65.5		56.7		16
Adjusted EBITDA	$	1,762.7	$	1,623.7	9	%

	Three Months Ended March 31,				Percent Increase (Decrease)
	2023		2022
Net income	$	315.0	$	702.7	(55)	%
Real estate related depreciation, amortization and accretion	728.8		725.1		1
Losses from sale or disposal of real estate and real estate related impairment charges (1)	118.7		13.8		760
Dividends to noncontrolling interests (2)	(11.4)		—		100
Adjustments for unconsolidated affiliates and noncontrolling interests	(68.2)		(41.5)		64
Nareit FFO attributable to American Tower Corporation common stockholders	$	1,082.9	$	1,400.1	(23)	%
Straight-line revenue	(112.0)		(109.4)		2
Straight-line expense	7.9		10.6		(25)
Stock-based compensation expense	65.5		56.7		16
Deferred portion of income tax and other income tax adjustments	(8.9)		(77.3)		(88)
GTP one-time cash tax settlement (3)	—		45.8		(100)
Non-real estate related depreciation, amortization and accretion	65.3		90.7		(28)
Amortization of deferred financing costs, capitalized interest, debt discounts and premiums and long-term deferred interest charges	11.7		12.1		(3)
Other expense (income) (4)	97.8		(252.6)		(139)
Other operating expense (5)	8.8		12.3		(28)
Capital improvement capital expenditures	(35.7)		(27.7)		29
Corporate capital expenditures	(3.0)		(1.3)		131
Adjustments for unconsolidated affiliates and noncontrolling interests	68.2		41.5		64
Consolidated AFFO	$	1,248.5	$	1,201.5	4	%
Adjustments for unconsolidated affiliates and noncontrolling interests (6)	(63.5)		(34.4)		85	%
AFFO attributable to American Tower Corporation common stockholders	$	1,185.0	$	1,167.1	2	%

_______________

(1)Included in these amounts are impairment charges of $29.8 million and $5.8 million, respectively. For the three months ended March 31, 2023, includes a loss on the sale of Mexico Fiber of $80.0 million.

(2)For the three months ended March 31, 2023, includes $11.4 million of distributions related to the outstanding mandatorily convertible preferred equity in connection with our agreements with certain investment vehicles affiliated with Stonepeak Partners LP (such investment vehicles, collectively, “Stonepeak”).

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(3)In 2015, we incurred charges in connection with certain tax elections wherein MIP Tower Holdings LLC, parent company to Global Tower Partners (“GTP”), would no longer operate as a separate REIT for federal and state income tax purposes. We finalized a settlement related to this tax election in the three month period ended March 31, 2022. We believe that these related transactions are nonrecurring, and do not believe it is an indication of our operating performance. Accordingly, we believe it is more meaningful to present Consolidated AFFO excluding these amounts.

(4)Includes losses (gains) on foreign currency exchange rate fluctuations of $84.1 million and $(242.1) million, respectively.

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

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

The decrease in net income for the three months ended March 31, 2023 was primarily due to (i) changes in other expense (income), (ii) an increase in other operating expense, (iii) an increase in interest expense and (iv) an increase in the income tax provision, partially offset by (a) an increase in segment operating profit and (b) a decrease in depreciation, amortization and accretion expense.

The increase in Adjusted EBITDA for the three months ended March 31, 2023 was primarily attributable to the increase in our gross margin and a decrease in SG&A, excluding the impact of stock-based compensation expense of $38.8 million.

The increase in Consolidated AFFO and AFFO attributable to American Tower Corporation common stockholders for the three months ended March 31, 2023 was primarily attributable to an increase in our operating profit, excluding the impact of straight-line accounting, partially offset by (i) an increase in cash paid for interest, (ii) an increase in dividends to noncontrolling interests, including $11.4 million of distributions related to the outstanding Stonepeak mandatorily convertible preferred equity, and (iii) an increase in capital improvement capital expenditures. The increase in AFFO attributable to American Tower Corporation common stockholders was also impacted by changes in noncontrolling interests held in Data Centers since the beginning of the prior-year period.

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Liquidity and Capital Resources

The information in this section updates as of March 31, 2023 the “Liquidity and Capital Resources” section of the 2022 Form 10-K and should be read in conjunction with that report.

Overview

During the three months ended March 31, 2023, our significant financing transactions included:

•Redemption of our 3.50% senior unsecured notes due 2023 (the “3.50% Notes”) upon their maturity.

•Registered public offering in an aggregate amount of $1.5 billion of senior unsecured notes with maturities in 2028 and 2033.

•Securitization transactions, including the repayment of $1.3 billion aggregate principal amount outstanding under our Secured Tower Revenue Securities, Series 2013-2A due 2023 (the “Series 2013-2A Securities”) and the issuance of $1.3 billion aggregate principal amount of the Series 2023-1A Securities (as defined below).

As a holding company, our cash flows are derived primarily from the operations of, and distributions from, our operating subsidiaries or funds raised through borrowings under our credit facilities and debt or equity offerings.

The following table summarizes the significant components of our liquidity (in millions):

	As of March 31, 2023
Available under the 2021 Multicurrency Credit Facility	$	3,117.3
Available under the 2021 Credit Facility	2,835.0
Letters of credit	(34.0)
Total available under credit facilities, net	$	5,918.3
Cash and cash equivalents	1,803.0
Total liquidity	$	7,721.3

Subsequent to March 31, 2023, we made additional net borrowings of $585.0 million under the 2021 Credit Facility (as defined below).

Summary cash flow information is set forth below (in millions):

	Three Months Ended March 31,
	2023		2022
Net cash provided by (used for):
Operating activities	$	1,070.5	$	663.6
Investing activities	(276.8)		(513.1)
Financing activities	(1,012.6)		(250.9)
Net effect of changes in foreign currency exchange rates on cash and cash equivalents, and restricted cash	3.6		28.5
Net decrease in cash and cash equivalents, and restricted cash	$	(215.3)	$	(71.9)

We use our cash flows to fund our operations and investments in our business, including maintenance and improvements, communications site construction, managed network installations and acquisitions. Additionally, we use our cash flows to make distributions, including distributions of our REIT taxable income to maintain our qualification for taxation as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”). We may also periodically repay or repurchase our existing indebtedness or equity. We typically fund our international expansion efforts primarily through a combination of cash on hand, intercompany debt and equity contributions.

As of March 31, 2023, we had total outstanding indebtedness of $38.8 billion, with a current portion of $3.9 billion. During the three months ended March 31, 2023, we generated sufficient cash flow from operations, together with borrowings under our credit facilities, proceeds from our debt issuances and cash on hand, to fund our acquisitions, capital expenditures and debt service obligations, as well as our required distributions. We believe the cash generated by operating activities during the year ending December 31, 2023, together with our borrowing capacity under our credit facilities, will suffice to fund our required distributions, capital expenditures, debt service obligations (interest and principal repayments) and signed acquisitions.     

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Material Cash Requirements— There were no material changes to the Material Cash Requirements section of the 2022 Form 10-K.

As of March 31, 2023, we had $1.5 billion of cash and cash equivalents held by our foreign subsidiaries. As of March 31, 2023, we had $286.9 million of cash and cash equivalents held by our joint ventures, of which $236.1 million was held by our foreign joint ventures. While certain subsidiaries may pay us interest or principal on intercompany debt, it has not been our practice to repatriate earnings from our foreign subsidiaries primarily due to our ongoing expansion efforts and related capital needs. However, in the event that we do repatriate any funds, we may be required to accrue and pay certain taxes.

Cash Flows from Operating Activities

The increase in cash provided by operating activities for the three months ended March 31, 2023 was primarily attributable to (i) changes in unearned revenue, (ii) an increase in the operating profits of our U.S & Canada, Africa, Europe and Latin America property segments and our Data Centers and Services segments and (iii) a decrease in cash paid for taxes, partially offset by an increase in cash paid for interest.

Cash Flows from Investing Activities

Our significant investing activities during the three months ended March 31, 2023 are highlighted below:

•We received $252.5 million from the sale of Mexico Fiber.

•We spent $60.9 million for acquisitions, including payments made for acquisitions completed in 2022.

•We spent $473.0 million for capital expenditures, as follows (in millions):

Discretionary capital projects (1)	$	265.8
Ground lease purchases (2)	34.9
Capital improvements and corporate expenditures (3)	38.7
Redevelopment	108.8
Start-up capital projects	24.8
Total capital expenditures (4)	$	473.0

_______________

(1)Includes the construction of 1,333 communications sites globally.

(2)Includes $11.7 million of perpetual land easement payments reported in Deferred financing costs and other financing activities in the cash flows from financing activities in our condensed consolidated statements of cash flows.

(3)Includes $2.1 million of finance lease payments reported in Repayments of notes payable, credit facilities, senior notes, secured debt, term loan and finance leases in the cash flows from financing activities in our condensed consolidated statements of cash flows.

(4)Net of purchase credits of $2.7 million on certain assets, which are recorded in investing activities in our condensed consolidated statements of cash flows.

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

We expect that our 2023 total capital expenditures will be as follows (in millions):

Discretionary capital projects (1)	$	785	to	$	815
Ground lease purchases	85		to	105
Capital improvements and corporate expenditures	175		to	185
Redevelopment	485		to	515
Start-up capital projects	120		to	140
Total capital expenditures	$	1,650	to	$	1,760

_______________

(1)Includes the construction of approximately 3,450 to 4,550 communications sites globally and approximately $360 million of anticipated spend related to data center assets.

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Cash Flows from Financing Activities

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

	Three Months Ended March 31,
	2023		2022
Proceeds from issuance of senior notes, net	$	1,494.2	$	—
(Repayments) proceeds from credit facilities, net	(835.0)		1,990.0
Proceeds from issuance of securities in securitization transaction	1,300.0		—
Repayment of securitized debt	(1,300.0)		—
Repayments of senior notes (1)	(1,000.0)		(1,551.1)
Distributions to noncontrolling interest holders	(11.2)		(0.1)
Distributions paid on common stock	(733.6)		(641.2)

___________

(1)For the three months ended March 31, 2022, included payment in full of $875.0 million aggregate principal amount and a fair value adjustment of $80.1 million of debt assumed in connection with the acquisition of CoreSite Realty Corporation.

Securitizations

Repayment of Series 2013-2A Securities—On the March 2023 repayment date, we repaid the entire $1.3 billion aggregate principal amount outstanding under the Series 2013-2A Securities, pursuant to the terms of the agreements governing those securities. The repayment was funded with proceeds from the 2023 Securitization (as defined below).

Secured Tower Revenue Securities, Series 2023-1, Subclass A and Series 2023-1, Subclass R— On March 13, 2023, we completed a securitization transaction (the “2023 Securitization”), in which American Tower Trust I (the “Trust”) issued $1.3 billion aggregate principal amount of Secured Tower Revenue Securities, Series 2023-1, Subclass A (the “Series 2023-1A Securities”). To satisfy the applicable risk retention requirements of Regulation RR promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act” and, such requirements, the “Risk Retention Rules”), the Trust issued, and one of our affiliates purchased, $68.5 million aggregate principal amount of Secured Tower Revenue Securities, Series 2023-1, Subclass R (the “Series 2023-1R Securities” and, together with the Series 2023-1A Securities, the “2023 Securities”) to retain an “eligible horizontal residual interest” (as defined in the Risk Retention Rules) in an amount equal to at least 5% of the fair value of the 2023 Securities.

The assets of the Trust consist of a nonrecourse componentized loan, which also secures each of (i) the Secured Tower Revenue Securities, Series 2018-1, Subclass A (the “Series 2018-1A Securities”) and (ii) the Secured Tower Revenue Securities, Series 2018-1, Subclass R (the “Series 2018-1R Securities” and, together with the Series 2018-1A Securities, the “2018 Securities”) issued in a securitization transaction in March 2018 (the “2018 Securitization” and, together with the 2023 Securitization, the “Trust Securitizations”) (the “Loan”) made by the Trust to American Tower Asset Sub, LLC and American Tower Asset Sub II, LLC (together, the “AMT Asset Subs”). The AMT Asset Subs are jointly and severally liable under the Loan, which is secured primarily by mortgages on the AMT Asset Subs’ interests in 5,036 broadcast and wireless communications towers and related assets (the “Trust Sites”).

The 2023 Securities correspond to components of the Loan made to the AMT Asset Subs pursuant to the Second Supplement and Amendment dated as of March 13, 2023 (the “2023 Supplement”) to the Second Amended and Restated Loan and Security Agreement dated as of March 29, 2018 (the “Loan Agreement,” which continues to govern the 2018 Securities, and collectively, the “Trust Loan Agreement”).

The 2023 Securities represent a pass-through interest in the components of the Loan corresponding to the 2023 Securities. The Series 2023-1A Securities have an interest rate of 5.490% and the Series 2023-1R Securities have an interest rate of 5.735%. The 2023 Securities have an expected life of approximately five years with a final repayment date in March 2053.

The debt service on the Loan will be paid solely from the cash flows generated from the operation of the Trust Sites held by the AMT Asset Subs. The AMT Asset Subs are required to make monthly payments of interest on the Loan. Subject to certain limited exceptions described below, no payments of principal will be required to be made on the components of the Loan corresponding to the 2023 Securities prior to the monthly payment date in March 2028, which is the anticipated repayment date for such components.

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The AMT Asset Subs may prepay the Loan at any time, provided it is accompanied by applicable prepayment consideration. If the prepayment occurs within twelve months of the anticipated repayment date for the 2023 Securities, no prepayment consideration is due. The entire unpaid principal balance of the components of the Loan corresponding to the 2023 Securities will be due in March 2053.

Repayment of 3.50% Senior Notes—On January 31, 2023, we repaid $1.0 billion aggregate principal amount of the 3.50% Notes upon their maturity. The 3.50% Notes were repaid using borrowings under the 2021 Credit Facility. Upon completion of the repayment, none of the 3.50% Notes remained outstanding.

Offering of Senior Notes

5.500% Senior Notes and 5.650% Senior Notes Offering—On March 3, 2023, we completed a registered public offering of $700.0 million aggregate principal amount of 5.500% senior unsecured notes due 2028 (the “5.500% Notes”) and $800.0 million aggregate principal amount of 5.650% senior unsecured notes due 2033 (the “5.650% Notes” and, together with the 5.500% Notes, the “Notes”). The net proceeds from this offering were approximately $1,480.9 million, after deducting commissions and estimated expenses, which we used to repay existing indebtedness under the 2021 Multicurrency Credit Facility (as defined below) and the 2021 Credit Facility.

The key terms of the Notes are as follows:

Senior Notes	Aggregate Principal Amount (in millions)		Issue Date and Interest Accrual Date	Maturity Date	Contractual Interest Rate	First Interest Payment	Interest Payments Due (1)	Par Call Date (2)
5.500% Notes	$	700.0	March 3, 2023	March 15, 2028	5.500%	September 15, 2023	March 15 and September 15	February 15, 2028
5.650% Notes	$	800.0	March 3, 2023	March 15, 2033	5.650%	September 15, 2023	March 15 and September 15	December 15, 2032

___________

(1)Accrued and unpaid interest on U.S. Dollar (“USD”) denominated notes is payable in USD semi-annually in arrears and will be computed from the issue date on the basis of a 360-day year comprised of twelve 30-day months.

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

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

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

2021 Multicurrency Credit Facility—During the three months ended March 31, 2023, we borrowed an aggregate of $725.0 million and repaid an aggregate of $1.6 billion of revolving indebtedness under our $6.0 billion senior unsecured multicurrency revolving credit facility, as amended and restated in December 2021 (the “2021 Multicurrency Credit Facility”). We used the borrowings for general corporate purposes. We currently have $3.5 million of undrawn letters of credit and maintain the ability to draw down and repay amounts under the 2021 Multicurrency Credit Facility in the ordinary course.

2021 Credit Facility—During the three months ended March 31, 2023, we borrowed an aggregate of $1.0 billion and repaid an aggregate of $935.0 million of revolving indebtedness under our $4.0 billion senior unsecured revolving credit facility, as amended and restated in December 2021 (the “2021 Credit Facility”). We used the borrowings to repay outstanding indebtedness, including the 3.50% Notes. We currently have $30.5 million of undrawn letters of credit and maintain the ability to draw down and repay amounts under the 2021 Credit Facility in the ordinary course.

As of March 31, 2023, the key terms under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, our $1.0 billion unsecured term loan, as amended and restated in December 2021 (the “2021 Term Loan”), our 825.0 million

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EUR unsecured term loan, as amended and restated in December 2021 (the “2021 EUR Three Year Delayed Draw Term Loan”) and our $1.5 billion unsecured term loan entered into in December 2021 (the “2021 USD Two Year Delayed Draw Term Loan”) were as follows:

Bank Facility		Outstanding Principal Balance ($ in millions)		Maturity Date		LIBOR or EURIBOR borrowing interest rate range (1)	Base rate borrowing interest rate range (1)	Current margin over LIBOR or EURIBOR and the base rate, respectively
2021 Multicurrency Credit Facility	(2)	$	2,882.7	June 30, 2025	(3)	0.875% - 1.750%	0.000% - 0.750%	1.125% and 0.125%
2021 Credit Facility	(4)	1,165.0		January 31, 2027	(3)	0.875% - 1.750%	0.000% - 0.750%	1.125% and 0.125%
2021 Term Loan	(4)	1,000.0		January 31, 2027		0.875% - 1.750%	0.000% - 0.750%	1.125% and 0.125%
2021 EUR Three Year Delayed Draw Term Loan	(5)	894.2		May 28, 2024		0.875% - 1.625%	0.000% - 0.625%	1.125% and 0.125%
2021 USD Two Year Delayed Draw Term Loan	(4)	1,500.0		December 28, 2023		0.875% - 1.750%	0.000% - 0.750%	1.125% and 0.125%

___________

(1)Represents interest rate above: (a) the London Interbank Offered Rate (“LIBOR”) for LIBOR based borrowings, (b) Euro Interbank Offer Rate (“EURIBOR”) for EURIBOR based borrowings and (c) the defined base rate for base rate borrowings, in each case based on our debt ratings.

(2)Currently borrowed at LIBOR for USD denominated borrowings and at EURIBOR for EUR denominated borrowings.

(3)Subject to two optional renewal periods.

(4)Currently borrowed at LIBOR.

(5)Currently borrowed at EURIBOR.

We must pay a quarterly commitment fee on the undrawn portion of each of the 2021 Multicurrency Credit Facility and the 2021 Credit Facility. The commitment fee for the 2021 Multicurrency Credit Facility and the 2021 Credit Facility ranges from 0.080% to 0.300% per annum, based upon our debt ratings, and is currently 0.110%.

The 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan, the 2021 EUR Three Year Delayed Draw Term Loan and the 2021 USD Two Year Delayed Draw Term Loan do not require amortization of principal and may be paid prior to maturity in whole or in part at our option without penalty or premium. We have the option of choosing either a defined base rate, LIBOR or EURIBOR as the applicable base rate for borrowings under these bank facilities.

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

India Term Loan—On February 16, 2023, we entered into a 12.0 billion INR (approximately $145.1 million at the date of signing) unsecured term loan with a maturity date that is one year from the date of the first draw thereunder (the “India Term Loan”). On February 17, 2023, we borrowed 10.0 billion INR (approximately $120.7 million at the date of borrowing) under the India Term Loan. The India Term Loan bears interest at the three month treasury bill rate as announced by the Financial Benchmarks India Private Limited plus a margin of 1.95%. Any outstanding principal and accrued but unpaid interest will be due and payable in full at maturity. The India Term Loan does not require amortization of principal and may be paid prior to maturity in whole or in part at our option without penalty or premium.

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

During the three months ended March 31, 2023, there were no repurchases under either Buyback Program.

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We expect to continue managing the pacing of the remaining approximately $2.0 billion under the Buyback Programs in response to general market conditions and other relevant factors. We expect to fund any further repurchases of our common stock through a combination of cash on hand, cash generated by operations and borrowings under our credit facilities. Repurchases under the Buyback Programs are subject to, among other things, us having available cash to fund the repurchases.

Sales of Equity Securities—We receive proceeds from sales of our equity securities pursuant to our employee stock purchase plan and upon exercise of stock options granted under our equity incentive plan. During the three months ended March 31, 2023, we received an aggregate of $1.8 million in proceeds upon exercises of stock options.

2020 “At the Market” Stock Offering Program—In August 2020, we established an “at the market” stock offering program through which we may issue and sell shares of our common stock having an aggregate gross sales price of up to $1.0 billion (the “2020 ATM Program”). Sales under the 2020 ATM Program may be made by means of ordinary brokers’ transactions on the New York Stock Exchange or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or, subject to our specific instructions, at negotiated prices. We intend to use the net proceeds from any issuances under the 2020 ATM Program for general corporate purposes, which may include, among other things, the funding of acquisitions, additions to working capital and repayment or refinancing of existing indebtedness. As of March 31, 2023, we have not sold any shares of common stock under the 2020 ATM Program.

Future Financing Transactions—We regularly consider various options to obtain financing and access the capital markets, subject to market conditions, to meet our funding needs. Such capital raising alternatives, in addition to those noted above including the 2020 ATM Program, may include amendments and extensions of our bank facilities, entry into new bank facilities, transactions with private equity funds or partnerships, additional senior note offerings and securitization transactions. No assurance can be given as to whether any such financing transactions will be completed or as to the timing or terms thereof.

Distributions—As a REIT, we must annually distribute to our stockholders an amount equal to at least 90% of our REIT taxable income (determined before the deduction for distributed earnings and excluding any net capital gain). Generally, we have distributed, and expect to continue to distribute, all or substantially all of our REIT taxable income after taking into consideration our utilization of net operating losses (“NOLs”). We have distributed an aggregate of approximately $15.2 billion to our common stockholders, including the dividend to be paid in April 2023, primarily classified as ordinary income that may be treated as qualified REIT dividends under Section 199A of the Code for taxable years ending before 2026.

During the three months ended March 31, 2023, we paid $1.56 per share, or $726.3 million, to our common stockholders of record. In addition, we declared a distribution of $1.56 per share, or $727.0 million, to be paid on April 28, 2023 to our common stockholders of record at the close of business on April 14, 2023.

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

We accrue distributions on unvested restricted stock units, which are payable upon vesting. As of March 31, 2023, the amount accrued for distributions payable related to unvested restricted stock units was $13.0 million. During the three months ended March 31, 2023, we paid $6.6 million of distributions upon the vesting of restricted stock units.

Factors Affecting Sources of Liquidity    

As discussed in the “Liquidity and Capital Resources” section of the 2022 Form 10-K, our liquidity depends on our ability to generate cash flow from operating activities, borrow funds under our credit facilities and maintain compliance with the contractual agreements governing our indebtedness. We believe that the debt agreements discussed below represent our material debt agreements that contain covenants, our compliance with which would be material to an investor’s understanding of our financial results and the impact of those results on our liquidity.

Restrictions Under Loan Agreements Relating to Our Credit Facilities—The loan agreements for the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan, the 2021 EUR Three Year Delayed Draw Term Loan and

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the 2021 USD Two Year Delayed Draw Term Loan contain certain financial and operating covenants and other restrictions applicable to us and our subsidiaries that are not designated as unrestricted subsidiaries on a consolidated basis. These restrictions include limitations on additional debt, distributions and dividends, guaranties, sales of assets and liens. The loan agreements also contain covenants that establish financial tests with which we and our restricted subsidiaries must comply related to total leverage and senior secured leverage, as set forth in the table below. As of March 31, 2023, we were in compliance with each of these covenants.

		Compliance Tests For The 12 Months Ended March 31, 2023 ($ in billions)
	Ratio (1)	Additional Debt Capacity Under Covenants (2)	Capacity for Adjusted EBITDA Decrease Under Covenants (3)
Consolidated Total Leverage Ratio	Total Debt to Adjusted EBITDA ≤ 6.00:1.00	~ 2.5	~ 0.4
Consolidated Senior Secured Leverage Ratio	Senior Secured Debt to Adjusted EBITDA ≤ 3.00:1.00	~ 18.0 (4)	~ 6.0

_______________

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

(2)Assumes no change to Adjusted EBITDA.

(3)Assumes no change to our debt levels.

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

The loan agreements for our credit facilities also contain reporting and information covenants that require us to provide financial and operating information to the lenders within certain time periods. If we are unable to provide the required information on a timely basis, we would be in breach of these covenants.

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

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

Under the Securitization Loan Agreements, amounts due will be paid from the cash flows generated by the assets securing the Series 2015-2 Notes or the assets securing the Loan, as applicable, which must be deposited into certain reserve accounts, and thereafter distributed, solely pursuant to the terms of the applicable agreement. On a monthly basis, after payment of all required amounts under the applicable agreement, subject to the conditions described in the table below, the excess cash flows generated from the operation of such assets are released to GTP Acquisition Partners or the AMT Asset Subs, as applicable, which can then be distributed to us for use. As of March 31, 2023, $87.9 million held in such reserve accounts was classified as restricted cash.

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

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	Issuer or Borrower	Notes/Securities Issued	Conditions Limiting Distributions of Excess Cash		Excess Cash Distributed During the Three Months Ended March 31, 2023	DSCR as of March 31, 2023	Capacity for Decrease in Net Cash Flow Before Triggering Cash Trap DSCR (1)	Capacity for Decrease in Net Cash Flow Before Triggering Minimum DSCR (1)
			Cash Trap DSCR	Amortization Period
					(in millions)		(in millions)	(in millions)
2015 Securitization	GTP Acquisition Partners	American Tower Secured Revenue Notes, Series 2015-2	1.30x, Tested Quarterly (2)	(3)(4)	$93.0	17.81x	$303.8	$306.5
Trust Securitizations	AMT Asset Subs	Secured Tower Revenue Securities, Series 2023-1, Subclass A, Secured Tower Revenue Securities, Series 2023-1, Subclass R, Secured Tower Revenue Securities, Series 2018-1, Subclass A and Secured Tower Revenue Securities, Series 2018-1, Subclass R	1.30x, Tested Quarterly (2)	(3)(5)	$135.7	7.20x	$531.9	$545.4

_____________

(1)Based on the net cash flow of the applicable issuer or borrower as of March 31, 2023 and the expenses payable over the next 12 months on the Series 2015-2 Notes or the Loan, as applicable.

(2)If the DSCR were equal to or below 1.30x (the “Cash Trap DSCR”) for any quarter, all cash flow in excess of amounts required to make debt service payments, fund required reserves, pay management fees and budgeted operating expenses and make other payments required under the applicable transaction documents, referred to as excess cash flow, will be deposited into a reserve account (the “Cash Trap Reserve Account”) instead of being released to the applicable issuer or borrower. Once triggered, a Cash Trap DSCR condition continues to exist until the DSCR exceeds the Cash Trap DSCR for two consecutive calendar quarters. Additionally, if the borrower under the 2023 Securitization does not meet certain title insurance policy requirements within the specified time period under the agreements, excess cash flow will also be deposited into the Cash Trap Reserve Account.

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

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

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

A failure to meet the noted DSCR tests could prevent GTP Acquisition Partners or the AMT Asset Subs from distributing excess cash flow to us, which could affect our ability to fund our capital expenditures, including tower construction and acquisitions, and to meet REIT distribution requirements. During an “amortization period,” all excess cash flow and any amounts then in the applicable Cash Trap Reserve Account would be applied to pay the principal of the Series 2015-2 Notes or the Loan, as applicable, on each monthly payment date, and so would not be available for distribution to us. Further, additional interest will begin to accrue with respect to the Series 2015-2 Notes or the Loan from and after the anticipated repayment date at a per annum rate determined in accordance with the applicable agreement. With respect to the Series 2015-2 Notes, upon the occurrence of, and during, an event of default, the applicable trustee may, in its discretion or at the direction of holders of more than 50% of the aggregate outstanding principal of the Series 2015-2 Notes, declare the Series 2015-2 Notes immediately due and payable, in which case any excess cash flow would need to be used to pay holders of those notes. Furthermore, if GTP Acquisition Partners or the AMT Asset Subs were to default on the Series 2015-2 Notes or the Loan, the applicable trustee may seek to foreclose upon or otherwise convert the ownership of all or any portion of the 3,516 communications sites that secure the Series 2015-2 Notes or the 5,036 broadcast and wireless communications towers and related assets that secure the Loan, respectively, in which case we could lose those sites and their associated revenue.

As discussed above, we use our available liquidity and seek new sources of liquidity to fund capital expenditures, future growth and expansion initiatives, satisfy our distribution requirements and repay or repurchase our debt. If we determine that it is desirable or necessary to raise additional capital, we may be unable to do so, or such additional financing may be prohibitively expensive or restricted by the terms of our outstanding indebtedness. Additionally, as further discussed

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under the caption “Risk Factors” in Item 1A of the 2022 Form 10-K, market volatility and disruption caused by inflation, rising interest rates and supply chain disruptions may impact our ability to raise additional capital through debt financing activities or our ability to repay or refinance maturing liabilities, or impact the terms of any new obligations. If we are unable to raise capital when our needs arise, we may not be able to fund capital expenditures, future growth and expansion initiatives, satisfy our REIT distribution requirements and debt service obligations, or refinance our existing indebtedness.

In addition, our liquidity depends on our ability to generate cash flow from operating activities. As set forth under the caption “Risk Factors” in Item 1A of the 2022 Form 10-K, we derive a substantial portion of our revenues from a small number of customers and, consequently, a failure by a significant customer to perform its contractual obligations to us could adversely affect our cash flow and liquidity.

For more information regarding the terms of our outstanding indebtedness, please see note 8 to our consolidated financial statements included in the 2022 Form 10-K.

Critical Accounting Policies and Estimates

Management’s discussion and analysis of financial condition and results of operations are based upon our consolidated and condensed consolidated financial statements, which have been prepared in accordance with GAAP. The preparation of these financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, as well as related disclosures of contingent assets and liabilities. We evaluate our policies and estimates on an ongoing basis, including those related to impairment of long-lived assets, revenue recognition, rent expense, income taxes and accounting for business combinations and acquisitions of assets, as further discussed in the 2022 Form 10-K. Management bases its estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying amounts of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

We have reviewed our policies and estimates to determine our critical accounting policies for the three months ended March 31, 2023. We have made no material changes to the critical accounting policies described in the 2022 Form 10-K.

In October 2019, the Supreme Court of India issued a ruling regarding the definition of AGR and associated fees and charges, which was reaffirmed in March 2020, and again in July 2021 with respect to the total charges, that may have a material financial impact on certain of our customers and could affect their ability to perform their obligations under agreements with us. In September 2020, the Supreme Court of India defined the expected timeline of ten years for payments owed under the ruling. In September 2021, the government of India approved a relief package that, among other things, included (i) a four-year moratorium on the payment of AGR fees owed and (ii) a change in the definition of AGR on a prospective basis. In the third quarter of 2022, our largest customer in India, VIL, communicated that it would make partial payments of its contractual amounts owed to us and indicated that it would continue to make partial payments for the remainder of 2022. In late 2022, VIL had communicated its intent to resume payments in full under its contractual obligations owed to us beginning on January 1, 2023. However, in early 2023, VIL communicated that it would not be able to resume payments in full of its contractual obligations owed to us, and that it would instead continue to make partial payments. As a result, we determined that certain fixed and intangible assets had been impaired during the year ended December 31, 2022. During the year ended December 31, 2022, an impairment of $97.0 million was taken on tower and network location intangible assets in India. We also impaired the tenant-related intangible assets for VIL, which resulted in an impairment of $411.6 million during the year ended December 31, 2022.

We will continue to monitor the status of these developments, as it is possible that the estimated future cash flows may differ from current estimates and changes in estimated cash flows from customers in India could have further negative effects on previously recorded tangible and intangible assets, including amounts originally recorded as tenant-related intangibles, resulting in additional impairments. Events that could negatively affect our India reporting unit’s financial results include increased tenant attrition exceeding our forecast, additional VIL payment shortfalls, carrier tenant bankruptcies and other factors set forth in Item 1A of the 2022 Form 10-K under the caption “Risk Factors.”

The carrying value of tenant-related intangibles in India was $373.9 million as of March 31, 2023, which represents 3% of our consolidated balance of $12.9 billion. Additionally, a significant reduction in customer related cash flows in India could also impact our tower portfolio and network location intangibles. The carrying values of our tower portfolio and network location intangibles in India were $0.9 billion and $263.4 million, respectively, as of March 31, 2023, which represent 11% and 8% of our consolidated balances of $8.9 billion and $3.5 billion, respectively. The carrying value of

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goodwill in India was $0.9 billion as of March 31, 2023, which represents 7% of our consolidated balance of $13.0 billion.

During the three months ended March 31, 2023, no potential goodwill impairment was identified as the fair value of each of our reporting units was in excess of its carrying amount.

Accounting Standards Update

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

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate Risk

As of March 31, 2023, we have three interest rate swap agreements related to a portion of our 3.000% senior unsecured notes due 2023 (the “3.000% Notes”). These swaps have been designated as fair value hedges, have an aggregate notional amount of $500.0 million and an interest rate of one-month LIBOR plus applicable spreads and expire in June 2023.

Changes in interest rates can cause interest charges to fluctuate on our variable rate debt. Variable rate debt as of March 31, 2023 consisted of $2.9 billion under the 2021 Multicurrency Credit Facility, $1.2 billion under the 2021 Credit Facility, $1.0 billion under the 2021 Term Loan, $894.2 million under the 2021 EUR Three Year Delayed Draw Term Loan, $1.5 billion under the 2021 USD Two Year Delayed Draw Term Loan and $500.0 million under the interest rate swap agreements related to the 3.000% Notes and $33.8 million under the Nigeria letters of credit. A 10% increase in current interest rates would result in an additional $10.5 million of interest expense for the three months ended March 31, 2023.

Foreign Currency Risk

We are exposed to market risk from changes in foreign currency exchange rates primarily in connection with our foreign subsidiaries and joint ventures internationally. Any transaction denominated in a currency other than the U.S. Dollar is reported in U.S. Dollars at the applicable exchange rate. All assets and liabilities are translated into U.S. Dollars at exchange rates in effect at the end of the applicable fiscal reporting period and all revenues and expenses are translated at average rates for the period. The cumulative translation effect is included in equity as a component of Accumulated other comprehensive loss. We may enter into additional foreign currency financial instruments in anticipation of future transactions to minimize the impact of foreign currency exchange rate fluctuations. For the three months ended March 31, 2023, 44% of our revenues and 51% of our total operating expenses were denominated in foreign currencies.

As of March 31, 2023, we have incurred intercompany debt that is not considered to be permanently reinvested and similar unaffiliated balances that were denominated in a currency other than the functional currency of the subsidiary in which it is recorded. As this debt had not been designated as being a long-term investment in nature, any changes in the foreign currency exchange rates will result in unrealized gains or losses, which will be included in our determination of net income. An adverse change of 10% in the underlying exchange rates of our unsettled intercompany debt and similar unaffiliated balances would result in $51.6 million of unrealized losses that would be included in Other expense in our consolidated statements of operations for the three months ended March 31, 2023. As of March 31, 2023, we have 7.3 billion EUR (approximately $7.9 billion) denominated debt outstanding. An adverse change of 10% in the underlying exchange rates of our outstanding EUR debt would result in $0.9 billion of foreign currency losses that would be included in Other expense in our consolidated statements of operations for the three months ended March 31, 2023.

ITEM 4. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

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

Our management, with the participation of our principal executive officer and principal financial officer, evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as of the end of the period covered by this Quarterly Report. Based on this evaluation, our principal executive officer and principal financial officer concluded that these disclosure controls and procedures were effective as of March 31, 2023 and designed to ensure that the information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the requisite time periods specified in the applicable rules and forms, and that it is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure.

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Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) during the fiscal quarter ended March 31, 2023 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

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

ITEM 1A. RISK FACTORS

There were no material changes to the risk factors disclosed in Item 1A of the 2022 Form 10-K.

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ITEM 6. EXHIBITS

		Incorporated By Reference
Exhibit No.	Description of Document	Form	File No.	Date of Filing	Exhibit No.
3.1	Restated Certificate of Incorporation of the Company as filed with the Secretary of State of the State of Delaware, effective as of December 31, 2011	8-K	001-14195	January 3, 2012	3.1
3.2	Certificate of Merger, effective as of December 31, 2011	8-K	001-14195	January 3, 2012	3.2
3.3	Amended and Restated By-Laws of the Company, effective as of February 12, 2016	8-K	001-14195	February 16, 2016	3.1
4.1	Supplemental Indenture No. 1, dated as of March 3, 2023, by and between American Tower Corporation and U.S. Bank Trust Company, National Association, as Trustee, for the 5.500% Senior Notes due 2028 and the 5.650% Senior Notes due 2033	8-K	001-14195	March 3, 2023	4.1
10.1	Second Supplement and Amendment dated as of March 13, 2023 to the Second Amended and Restated Loan and Security Agreement dated as of March 29, 2018, by and among American Tower Asset Sub, LLC and American Tower Asset Sub II, LLC, as Borrowers, and U.S. Bank Trust Company, National Association, as Trustee for American Tower Trust I Secured Tower Revenue Securities as Lender	Filed herewith as Exhibit 10.1	—	—	—
10.2	First Amendment dated as of March 13, 2023 to the Second Amended and Restated Cash Management Agreement dated as of March 29, 2018, by and among American Tower Asset Sub, LLC, American Tower Asset Sub II, LLC, the Borrowers party thereto, U.S. Bank Trust Company, National Association, as Trustee for American Tower Trust I Secured Tower Revenue Securities as Lender, Midland Loan Services, a Division of PNC Bank, National Association, as Servicer, U.S. Bank National Association, as Agent, and Spectrasite Communications, LLC, as Manager	Filed herewith as Exhibit 10.2	—	—	—
10.3	Second Trust Agreement Supplement and Amendment dated as of March 13, 2023 to Second Amended and Restated Trust and Servicing Agreement dated as of March 29, 2018, by and among American Tower Depositor Sub, LLC, as Depositor, Midland Loan Services, a Division of PNC Bank, National Association, as Servicer, and U.S. Bank Trust Company, National Association, as Trustee	Filed herewith as Exhibit 10.3	—	—	—
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002	Filed herewith as Exhibit 31.1	—	—	—
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002	Filed herewith as Exhibit 31.2	—	—	—

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		Incorporated By Reference
Exhibit No.	Description of Document	Form	File No.	Date of Filing	Exhibit No.
32	Certifications filed pursuant to 18. U.S.C. Section 1350	Filed herewith as Exhibit 32	—	—	—
101.SCH	Inline XBRL Taxonomy Extension Schema Document		—	—	—
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	Inline XBRL Taxonomy Extension Definition	Filed herewith as Exhibit 101
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)	—	—	—	—

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	AMERICAN TOWER CORPORATION
Date: April 26, 2023	By:	/S/   RODNEY M. SMITH
		Rodney M. Smith Executive Vice President, Chief Financial Officer and Treasurer (Duly Authorized Officer and Principal Financial Officer)

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EX-10.1

Exhibit 10.1

EXECUTION VERSION

SECOND SUPPLEMENT AND AMENDMENT TO

SECOND AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT

between

AMERICAN TOWER ASSET SUB, LLC,

AMERICAN TOWER ASSET SUB II, LLC,

as Borrowers

and

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,

as Trustee for American Tower Trust I Secured Tower Revenue Securities,

as Lender

dated as of March 13, 2023

Secured Tower Revenue Securities, Series 2023-1A and Series 2023-1R

TABLE OF CONTENTS

		Page
ARTICLE I
DEFINITIONS AND INCORPORATION BY REFERENCE
Section 1.01	Definitions		2
ARTICLE II
2023-1A AND 2023-1R COMPONENT DETAILS
Section 2.01	2023-1 Component Details		4
ARTICLE III
AMENDMENT OF THE LOAN AND SECURITY AGREEMENT
Section 3.01	Definitions		5
Section 3.02	Cash Trap Reserve		6
ARTICLE IV
GENERAL PROVISIONS
Section 4.01	Governing Law		7
Section 4.02	Severability		7
Section 4.03	Counterparts		7
Section 4.04	Trustee Capacity		8
ARTICLE V
APPLICABILITY OF LOAN AND SECURITY AGREEMENT
Section 5.01	Applicability		8

i

SECOND SUPPLEMENT AND AMENDMENT TO

SECOND AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT

This SECOND SUPPLEMENT AND AMENDMENT TO SECOND AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT (this “Loan Agreement Supplement”) is dated as of March 13, 2023 and entered into by and among AMERICAN TOWER ASSET SUB, LLC, a Delaware limited liability company, AMERICAN TOWER ASSET SUB II, LLC, a Delaware limited liability company (collectively, the “Borrowers”), and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, a national banking association, as successor in interest to U.S. Bank National Association, as Trustee for American Tower Trust I as successor in interest to American Tower Depositor Sub, LLC (“Original Lender”) (together with its successors and assigns, “Lender”).

RECITALS

WHEREAS, the Borrowers and Original Lender entered into that certain Loan and Security Agreement, dated as of May 4, 2007 (the “Initial Loan Agreement”), as supplemented by that First Loan and Security Agreement Supplement, dated as of May 4, 2007, and as further supplemented by that Loan and Security Agreement Supplement, dated as of May 4, 2012, pursuant to which American Tower Antenna Asset Sub, LLC, a Delaware limited liability company, became a Borrower under the Initial Loan Agreement and the Loan Documents (as defined in the Initial Loan Agreement). The Initial Loan Agreement, as so supplemented, the “Original Loan Agreement”;

WHEREAS, the Borrowers entered into a First Amended and Restated Loan and Security Agreement, dated as of March 15, 2013 (the “2013 Loan Agreement”), as supplemented by that First Loan and Security Agreement Supplement, dated as of March 15, 2013, among the Borrowers and Lender, which such 2013 Loan Agreement fully amended and restated the Original Loan Agreement (but did not constitute a novation thereof);

WHEREAS, the Borrowers have entered into a Second Amended and Restated Loan and Security Agreement, dated as of March 29, 2018 (the “Loan Agreement”), among the Borrowers and Lender, which such Loan Agreement fully amends and restates the 2013 Loan Agreement (but does not constitute a novation thereof);

WHEREAS, Lender has agreed to advance to the Borrowers under the Loan Agreement, in the form of two (2) separate components designated as 2023-1A (“2023-1A Component”) and 2023-1R (“2023-1R Component”; and, together with 2023-1A Component, the “2023-1 Components”) in an amount totaling One Billion Three Hundred Sixty Eight Million Five Hundred Thousand Dollars ($1,368,500,000.00);

WHEREAS, the 2023-1 Components constitute Components as defined in the Loan Agreement;

WHEREAS, the Borrowers and Lender have agreed to treat each Component as a separate loan for U.S. federal income tax purposes;

WHEREAS, the Borrowers and Lender intend these recitals to be a material part of this Loan Agreement Supplement; and

WHEREAS, all things necessary to make this Loan Agreement Supplement the valid and legally binding obligation of the Borrowers in accordance with its terms, for the uses and purposes herein set forth, have been done and performed.

NOW, THEREFORE, it is mutually covenanted and agreed as follows:

ARTICLE I

DEFINITIONS AND INCORPORATION BY REFERENCE

Section 1.01    Definitions. All words and phrases defined in the Loan Agreement shall have the same meaning in this Loan Agreement Supplement, except as otherwise appears in this Article. In addition, the following terms have the following meanings in this Loan Agreement Supplement unless the context clearly requires otherwise:

“2013 Loan Agreement” shall have the meaning ascribed to it in the Recitals hereto.

“2023-1 Components” shall have the meaning ascribed to it in the Recitals hereto.

“2023-1A Component” shall have the meaning ascribed to it in the Recitals hereto.

“2023-1R Component” shall have the meaning ascribed to it in the Recitals hereto.

“Anticipated Repayment Date” shall have the meaning ascribed to it in Section 2.01(b) hereof.

“Component Rate” means, for any Component, the rate per annum set forth in the appropriate column corresponding to such Component in Section 2.01(a)(i) hereof.

“Depositor” means American Tower Depositor Sub, LLC, a Delaware limited liability company.

“Initial Loan Agreement” shall have the meaning ascribed to it in the Recitals hereto.

“Initial Purchasers” shall mean Barclays Capital Inc., J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC, MUFG Securities Americas Inc., RBC Capital Markets, LLC and the other initial purchasers listed on Schedule I to the Purchase Agreement.

“Loan Agreement” shall have the meaning ascribed to it in the Recitals hereto.

2

“Loan Agreement Supplement” shall have the meaning ascribed to it in the Recitals hereto.

“Maturity Date” shall have the meaning ascribed to it in Section 2.01(a)(iii) hereof.

“Offering Memorandum” shall mean the Offering Memorandum, dated March 8, 2023, relating to the offering and sale of the Securities.

“Original Loan Agreement” shall have the meaning ascribed to it in the Recitals hereto.

“Purchase Agreement” shall mean the Securities Purchase Agreement, dated March 8, 2023, among the Depositor, the Trustee, the Manager and the Initial Purchasers, relating to the purchase by the Initial Purchasers of the Securities.

“Post-ARD Additional Interest Rate” shall have the meaning ascribed to it in Section 2.01(a)(ii) hereof.

“Post-ARD Spread” shall have the meaning ascribed to it in Section 2.01(a)(ii) hereof.

“Rating Agency” means, with respect to 2023-1A Component, Moody’s or Fitch. If any such rating agency or any successor fails to remain in existence, “Rating Agency” shall be deemed to refer to such other nationally recognized statistical rating agency or other comparable Person designated by the Depositor, notice of which designation shall be given to the other parties hereto, and specific ratings of Fitch or Moody’s herein referenced shall be deemed to refer to the equivalent ratings of the party so designated.

“Securities” means the Series 2023-1A Securities and Series 2023-1R Securities issued by American Tower Trust I pursuant to the Trust Agreement corresponding to the 2023-1 Components.

Additional terms are defined in the body of this Loan Agreement Supplement.

In the event that any term or provision contained herein with respect to the 2023-1 Components shall conflict with or be inconsistent with any term or provision contained in the Loan Agreement, the terms and provisions of this Loan Agreement Supplement shall govern.

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All capitalized terms not defined herein shall have the meaning ascribed to them in the Loan Agreement.

ARTICLE II

2023-1A AND 2023-1R COMPONENT DETAILS

Section 2.01    2023-1 Component Details.

(a)    The 2023-1 Components authenticated and delivered under this Loan Agreement Supplement shall consist of two (2) separate Components, each having:

(i)    the designation, Component Principal Balance and Component Rate set forth below.

Component	Initial Component Principal Balance	Component Rate
2023-1A	$1,300,000,000.00	5.490%
2023-1R	$68,500,000.00	5.735%

(ii)    With respect to 2023-1A Component only, Post-ARD Additional Interest Rate determined by the Servicer to be the greater of (i) 5.0% and (ii) the amount, if any, by which the sum of the following exceeds the Component Rate for 2023-1A Component: (a) the yield to maturity (adjusted to a “mortgage equivalent basis” pursuant to the standards and practices of the Securities Industry Association) on such Anticipated Repayment Date of the United States Treasury Security having a term closest to 10 years plus (b) 5.0%, plus (c) the spread (the “Post-ARD Spread”) set forth in the table below opposite 2023-1A Component. For the avoidance of doubt, no Post-ARD Additional Interest will accrue with respect to 2023-1R Component:

Component	Post-ARD Spread	Refinancing Window
2023-1A	1.30%	From and after the date that is twelve months prior to the Anticipated Repayment Date

(iii)    a maturity date which is the Due Date occurring in March 2053 (a “Maturity Date”), or such earlier date on which the final payment of principal of the Notes becomes due and payable as provided in the Loan Agreement, whether at such stated Maturity Date, by acceleration, or otherwise.

(iv)    With respect to 2023-1A Component only, Yield Maintenance shall be in an amount equal to the excess, if any, of the present value as of the date of prepayment of all future installments of principal and interest that the Borrowers would otherwise be required to pay on such Component (or portion thereof) on the related Due Date from the date of such prepayment to and including the first Due Date that occurs

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twelve (12) months prior to the Anticipated Repayment Date for such 2023-1A Component corresponding to the Series 2023-1A Securities (the period from and after such date and during which no Yield Maintenance is payable, the “Refinancing Window”), absent such prepayment, assuming the entire unpaid principal amount of such Component is required to be paid on such Due Date, with such present value determined by the use of a discount rate equal to the sum of (x) the present value on the date of prepayment (by acceleration or otherwise) of all future installments of principal and interest that the Borrowers would otherwise be required to pay on that portion of the applicable Component prepaid from the date of such prepayment to and including the first Due Date that is twelve (12) months prior to the Anticipated Repayment Date with respect to such Component absent such prepayment, assuming the entire unpaid Principal Amount of such Component is required to be paid on such Due Date, with such present value being determined by the use of a discount rate equal to the sum of (a) the yield to maturity (adjusted to a “mortgage equivalent basis” pursuant to the standards and practices of the Securities Industry Association), on the date of such prepayment of the United States Treasury Security having the term to maturity closest to such Due Date, plus (b) 0.50% over (y) that portion of the Component Principal Balance of such Component prepaid on the date of such prepayment.

(b)    There are no scheduled principal payments in respect of any of the 2023-1 Components, and the Borrowers shall not be required to pay any principal on any of the 2023-1 Components prior to the Due Date in March 2028 (such payment date, the “Anticipated Repayment Date”), other than after the occurrence and during the continuation of an Amortization Period or an Event of Default as provided in the Loan Agreement or as otherwise required under the terms of the Loan Documents.

(c)    The proceeds of the 2023-1 Components shall be used (i) to pay all fees and expenses incurred by the Borrowers and (ii) for other corporate purposes, including for distribution to the Guarantor.

ARTICLE III

AMENDMENT OF THE LOAN AND SECURITY AGREEMENT

Section 3.01    Definitions.

(a)    The parties hereto agree that Section 1.1 of the Loan Agreement is hereby amended by adding the following definitions in the appropriate alphabetical order as follows:

“Cash Trap Percentage” means (i) with respect to a Cash Trap Condition that exists pursuant to clause (x) of the definition thereof, 100%, (ii) with respect to a Cash Trap Condition that exists pursuant to clause (y) of the definition thereof, as of any applicable Due Date, (1) 40% minus (2) the percentage equivalent of a fraction (x) the numerator of which is the aggregate Annualized Run Rate Net Cash Flow for Sites that are subject to a Title Policy or Other Title Policy and (y) the denominator of which is the aggregate Annualized Run Rate Net Cash Flow for all Sites and (iii) with respect to a Cash Trap Condition that exists pursuant to clause (z) of the definition thereof, as of any

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applicable Due Date, (1) 88% minus (2) the percentage equivalent of a fraction (x) the numerator of which is the aggregate Annualized Run Rate Net Cash Flow for Sites that are subject to a Title Policy or Other Title Policy and (y) the denominator of which is the aggregate Annualized Run Rate Net Cash Flow for all Sites.

“2023-1 Closing Date” means March 13, 2023.

(b)    The parties hereto agree that the following definition in Section 1.01 of the Trust and Servicing Agreement is hereby amended by inserting the text therein which is double underlined in the place where such text appears below:

“Debt Service Coverage Ratio” or “DSCR” as of any date of determination is the Net Cash Flow for the Sites divided by the amount of interest, Servicing Fees, Custodian Fees and Trustee Fees that the Borrowers will be required to pay over the succeeding twelve (12) months on the Principal Amount of the Loan (excluding any Post-ARD Additional Interest, interest on the Components corresponding to any Series of Risk Retention Securities or Value Reduction Accrued Interest), determined without giving effect to any reduction in interest due related to any Value Reduction Amount and determined on a pro-forma basis to exclude Net Cash Flow from any Site that is released from the Collateral.

Section 3.02    Cash Trap Reserve. The parties hereto agree that Section 6.5 of the Loan Agreement is hereby amended by inserting the text therein which is double underlined in the place where such text appears below:

If a Cash Trap Condition shall occur, then, from and after the date that it is determined that a Cash Trap Condition has occurred (which shall be based upon the financial reporting required to be delivered pursuant to Section 5.1(A)(ii)) and for so long as such Cash Trap Condition continues to exist, the applicable Cash Trap Percentage ofall Excess Cash Flow (except as otherwise expressly provided below) shall be deposited with Lender (or its Servicer or agent) and held in the Central Account in accordance with the terms of the Cash Management Agreement (said funds, together with any interest thereon, the “Cash Trap Reserve”). A “Cash Trap Condition” shall exist (x)at such time as Lender determines that as of the last day of any calendar quarter ending prior to an Anticipated Repayment Date, the Debt Service Coverage Ratio is equal to or less than the Cash Trap DSCR, (y) on the first Due Date immediately following the sixth-month anniversary of the 2023-1 Closing Date, if, as of such day, the aggregate Annualized Run Rate Net Cash Flow for all Sites that are subject to Title Policies or Other Title Policies as of such day equals less than 40% of the aggregate Annualized Run Rate Net Cash Flow for all Sites; provided that, solely with respect to a Cash Trap Condition pursuant to this clause (y), if the Borrowers have used commercially reasonable efforts to obtain such title insurance policies, such Cash Trap Condition will not be deemed to have occurred until the second Due Date immediately following the sixth-month anniversary of the 2023-1

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Closing Date, or (z) on the first Due Date immediately following the one-year anniversary of the 2023-1 Closing Date, if, as of such day, the aggregate Annualized Run Rate Net Cash Flow for allSites that are subject to Title insurance Policies or Other Title Policies as of such day equals less than 88% of the aggregate Annualized Run Rate Net Cash Flow for all Sites, and shall continue to exist until (i) in the case of a Cash Trap Condition pursuant to clause (x), the Lender determines that the Debt Service Coverage Ratio exceeds the Cash Trap DSCR for two (2) consecutive calendar quarters, (ii) in the case of a Cash Trap Condition pursuant to clause (y), the first date following the 2023-1 Closing Date on which the aggregate Annualized Run Rate Net Cash Flow for Sites that are subject to Title Policies or Other Title Policies equals greater than or equal to 40% of the aggregate Annualized Run Rate Net Cash Flow for all Sites as of such date and (iii) in the case of a Cash Trap Condition pursuant to clause (z), the first date following the 2023-1 Closing Date on which aggregate Annualized Run Rate Net Cash Flow for Sites that are subject to Title Policies or Other Title Policies equals greater than or equal to 88% of the aggregate Annualized Run Rate Net Cash Flow for all Sites as of such date. Upon the commencement of an Amortization Period, Lender will apply any amounts in the Cash Trap Reserve on the next Due Date in accordance with the terms and conditions of the Trust Agreement, in the manner provided in Section 3.3(a) of the Cash Management Agreement for Available Funds. Any funds on deposit in the Cash Trap Reserve shall continue to be held as additional Collateral in accordance with this Section 6.5. Provided that no Event of Default exists and Lender determines that the Cash Trap DSCR test has been satisfied for two (2) consecutive calendar quarters (as determined above), any funds remaining in the Cash Trap Reserve shall be released to the Borrowers. The existence of a Cash Trap Condition shall be a reasonable determination made by Lender in good faith.

ARTICLE IV

GENERAL PROVISIONS

Section 4.01    Governing Law. THIS LOAN AGREEMENT SUPPLEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. THE BORROWERS IRREVOCABLY SUBMIT TO THE JURISDICTION OF ANY NEW YORK STATE COURT OR UNITED STATES FEDERAL COURT SITTING IN THE BOROUGH OF MANHATTAN, THE CITY OF NEW YORK IN RESPECT OF ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR IN RELATION TO THIS LOAN AGREEMENT SUPPLEMENT.

Section 4.02    Severability. In case any provision in this Loan Agreement Supplement shall be invalid, illegal or unenforceable, the validity, legality, and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

Section 4.03  Counterparts. This Loan Agreement Supplement may be executed in any number of counterparts, each of which so executed shall be deemed to be an original, but all such respective counterparts shall together constitute but one and the same instrument. Delivery of an executed counterpart of a signature page of this Loan Agreement Supplement in

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Portable Document Format (PDF) or by facsimile transmission shall be effective as delivery of a manually executed original counterpart of this Loan Agreement Supplement. The parties agree that this Loan Agreement Supplement or any amendment hereto or any other document necessary for the consummation of the transaction contemplated by this Loan Agreement Supplement may be accepted, executed or agreed to through the use of an electronic signature in accordance with the Electronic Signatures in Global and National Commerce Act, Title 15, United States Code, Sections 7001 et seq., the Uniform Electronic Transaction Act and any applicable state law. Electronic signature shall mean any electronic symbol or process attached to, or associated with, a contract or other record and adopted by a person with the intent to sign, authenticate or accept such contract or record and shall be the same as handwritten signatures for the purposes of validity, enforceability and admissibility. The words “execution,” “signed,” “signature,” “delivery,” and words of like import in or relating to this Loan Agreement Supplement or any document to be signed in connection with this Loan Agreement Supplement shall be deemed to include electronic signatures, deliveries or the keeping of records in electronic form.

Section 4.04    Trustee Capacity. It is expressly understood and agreed by the parties hereto that insofar as this Loan Agreement Supplement is executed by U.S. Bank Trust Company, National Association (i) it is executed and delivered, not in its individual capacity but solely as “trustee” under the under the Trust Agreement, in the exercise of the powers and authority conferred upon and vested in it thereunder, (ii) each of the representations, undertakings and agreements herein made is made and intended not as a personal representation, undertaking or agreement of U.S. Bank Trust Company, National Association, but is made and intended solely for the purpose of binding the trust fund established pursuant to the Trust Agreement, and (iii) under no circumstances shall the Trustee in its individual capacity be personally liable for the payment of any indebtedness or expenses, or be personally liable for the breach or failure of any obligation, representation, warranty or covenant made or undertaken under this Loan Agreement Supplement or any related document, or be responsible for the contents of any related disclosure document, including without limitation the Offering Memorandum.

ARTICLE V

APPLICABILITY OF LOAN AND SECURITY AGREEMENT

Section 5.01    Applicability. The provisions of the Loan Agreement are hereby ratified, approved and confirmed, as supplemented by this Loan Agreement Supplement. The representations, warranties and covenants contained in the Loan Agreement (except as expressly modified herein) are hereby reaffirmed with the same force and effect as if fully set forth herein and made again as of the date hereof.

[SIGNATURE PAGE FOLLOWS]

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IN WITNESS WHEREOF, the Borrowers and Lender have caused this Loan Agreement Supplement to be duly executed by their respective officers, thereunto duly authorized, all as of the day and year first above written.

AMERICAN TOWER ASSET SUB, LLC, as Borrower
By:	/s/ Rodney M. Smith
	Name: Rodney M. Smith
	Title:   Executive Vice President, Chief Financial Officer and Treasurer
AMERICAN TOWER ASSET SUB II, LLC, as Borrower
By:	/s/ Rodney M. Smith
	Name: Rodney M. Smith
	Title:   Executive Vice President, Chief Financial Officer and Treasurer

Signature Page to Second Supplement to Second A&R Loan and Security Agreement

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, not in its individual capacity but solely as Trustee
By:	/s/ Christopher J. Nuxoll
	Name: Christopher J. Nuxoll
	Title:   Vice President

Signature Page to Second Supplement to Second A&R Loan and Security Agreement

EX-10.2

Exhibit 10.2

EXECUTION VERSION

FIRST AMENDMENT TO

SECOND AMENDED AND RESTATED CASH MANAGEMENT AGREEMENT

among

AMERICAN TOWER ASSET SUB, LLC

AMERICAN TOWER ASSET SUB II, LLC

AND ANY OTHER BORROWER OR BORROWERS THAT MAY BECOME A PARTY

THERETO as Borrowers,

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee for American

Tower Trust I Secured Tower Revenue Securities as Lender,

MIDLAND LOAN SERVICES, a DIVISION OF PNC BANK, NATIONAL ASSOCIATION,

as Servicer,

U.S. BANK NATIONAL ASSOCIATION, as Agent,

and

SPECTRASITE COMMUNICATIONS, LLC, as Manager

dated as of March 13, 2023

FIRST AMENDMENT TO SECOND AMENDED AND RESTATED CASH

MANAGEMENT AGREEMENT

This FIRST AMENDMENT TO SECOND AMENDED AND RESTATED CASH AGREEMENT (this “Amendment”) is dated as of March 13, 2023, and entered into by and among AMERICAN TOWER ASSET SUB, LLC, AMERICAN TOWER ASSET SUB II, LLC, each a Delaware limited liability company (and together with any Additional Borrower that may become a party to the Cash Management Agreement by entering into a Loan Agreement Supplement, together with their successors and permitted assigns the “Borrowers”), U.S. BANK NATIONAL ASSOCIATION (“Agent”), U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as successor in interest to U.S. Bank National Association, as Trustee for American Tower Trust I Secured Tower Revenue Securities (“Lender”), MIDLAND LOAN SERVICES, a Division of PNC Bank, National Association (“Servicer”), and SPECTRASITE COMMUNICATIONS, LLC, a Delaware limited liability company (“Manager”).

RECITALS

WHEREAS, on March 29, 2018, the Borrowers, the Agent, U.S. Bank National Association, as lender, the Servicer and the Manager entered into that certain Second Amended and Restated Cash Management Agreement (the “Cash Management Agreement”), pursuant to which the initial Cash Management Agreement, dated as of May 4, 2007, was amended and restated;

WHEREAS, the Borrowers, the Agent, the Lender, the Servicer and the Manager have agreed to amend the Existing Cash Management Agreement as set forth herein.

NOW, THEREFORE, in consideration of the representations, warranties and covenants herein contained and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

Section 1.01    Definitions. All defined terms used herein and not defined herein shall have the meanings ascribed to such terms in the Cash Management Agreement, as amended hereby.

Section 1.02    Amendments to the Cash Management Agreement.

(a)      The parties hereto agree that the following definition in Section 1.01 of the Cash Management Agreement is hereby amended by (i) deleting the stricken text and (ii) inserting the text therein which is double underlined, in each case, in the place where such text appears below:

“Monthly Tenant Debt Service Coverage Ratio” means, as of the last day of any calendar month, (A) the excess of (i) the Annualized Run Rate Net Cash Flow for all Sites over (ii) the Non-Monthly Tenant Annualized Run Rate Revenue for all Non-Monthly Tenants divided by (B) the amount of interest, Servicing Fees,and Trustee Fees and Custodian Fees that the Borrowers will be required to pay over the succeeding twelve (12) months on the principal amount of the Loan (excluding any Post-ARD Additional Interest, interest on

Risk Retention Securities or Value Reduction Accrued Interest), determined without giving effect to any reduction in interest due to any Value Reduction Amount.

(b)      Clause (a) of Section 3.3 of the Cash Management Agreement is hereby amended by inserting the text therein which is double underlined, in each case, in the place where such text appears below:

(a)      At any time other than after the occurrence and during the continuance of an Event of Default, Agent shall allocate and deposit, as applicable, all Available Funds on deposit in the Central Account (other than Third-Party Receipts which shall be released to, and applied by, the Borrowers pursuant to Section 2.6) on each Due Date in the following amounts and order of priority:

(i)    first, and in the following order, to the Impositions and Insurance Reserve Sub Account, the Monthly Impositions and Insurance Amount, and then, if an Advance Rents Reserve Deposit Condition is continuing on such Due Date, to the Advance Rents Reserve Sub-Account, the Advance Rents Reserve Deposit for such Due Date,

(ii)    second, to the Lender all amounts then due and payable to the Lender under the Loan Agreement (other than principal and interest on the Loan), including any Additional Trust Fund Expenses,

(iii)    third, to the payment of accrued and unpaid interest due on the Component of the Loan corresponding to each Subclass of the Securities other than any Risk-Retention Securities (giving effect to any Value Reduction Amount then in effect, but excluding any Post-ARD Additional Interest and Value Reduction Accrued Interest), sequentially in order of alphabetical designation, and pro rata among any such Components of the same alphabetical designation, based on the aggregate amount of interest (excluding Post-ARD Additional Interest and Value Reduction Accrued Interest) payable on each such Component,

(iv)    fourth, to the Borrowers, an amount equal to the Monthly Operating Expense Amount for the next calendar month,

(v)    fifth, to the Manager, the accrued and unpaid Management Fee,

(vi)    sixth, to the Borrowers, the amount necessary to pay (A) Operating Expenses in excess of the Monthly Operating Expense Amount or Extraordinary Expenses, if any, and (B) if a Cash Trap Condition or Amortization Period is continuing on such Due Date, amounts necessary to exercise the AT&T Site Purchase Options (if the Manager, on behalf of the Borrowers, intends to exercise such options), in each case with the approval of the Lender, such approval not to be unreasonably withheld, conditioned or delayed,

(vii)    seventh, (A) if an Advance Rents Deposit Condition is continuing on such Due Date, to the Advance Rents Reserve Sub-Account, the Advance Rents

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Catch-Up Reserve Deposit for such Due Date, or (B) if no Advance Rents Deposit Condition is continuing on such Due Date and the Advance Rents Required Deposit Amount for such Due Date is greater than zero, to the Advance Rents Reserve Sub-Account, the Advance Rents Required Deposit Amount for such Due Date,

(viii)    eighth, if a Cash Trap Condition is continuing on such Due Date and (A) such Due Date is not the Anticipated Repayment Date for any Component of the Loan (other than any Component of the Loan corresponding to Risk Retention Securities), (B) an Amortization Period is not then in effect (other than an Amortization Period pursuant to clause (ii) of the definition thereof with respect to any Component of the Loan corresponding to Risk Retention Securities) and (C) no Event of Default has occurred and is continuing, then the product of (1) any Available Funds remaining in the Central Account after deposits for items (i) through (vii) above have been paid and (2) the Cash Trap Percentage for such Due Date, will be deposited into the Cash Trap Reserve Sub-Account; provided that in the case of a Cash Trap Condition pursuant to clause (y) or (z) thereof, the aggregate amount of Available Funds deposited into the Cash Trap Reserve Sub-Account during such Cash Trap Condition shall not exceed the product of (1) the aggregate Allocated Loan Amount for all Mortgaged Sites and (2) the Cash Trap Percentage for such Due Date,

(ix)    ninth, if such Due Date is on or after the Anticipated Repayment Date for any Component of the Loan corresponding to any Subclass of Securities other than Risk Retention Securities and (A) an Amortization Period is not then in effect (other than an Amortization Period pursuant to clause (ii) of the definition thereof with respect to any Component of the Loan corresponding to Risk Retention Securities), (B) no Event of Default has occurred and is continuing, and (C) if the amount of Available Funds remaining in the Central Account after deposits for items (i) through (viii) above have been paid is sufficient to pay in full the Component Principal Balance of each such Component of the Loan having an Anticipated Repayment Date on such Due Date, then such remaining Available Funds will be applied to the payment of the Component Principal Balance of each such Component of the Loan sequentially in order of alphabetical designation of each such Component, and pro rata among any such Components of the same alphabetical designation, based on the Component Principal Balance of each such Component, in each case in an amount up to the Component Principal Balance of each such Component,

(x)    tenth, if such Due Date is during the continuation of an Amortization Period with respect to any Component of a Loan (other than an Amortization Period pursuant to clause (ii) of the definition thereof with respect to any Component of the Loan corresponding to Risk Retention Securities) or an Event of Default, any Available Funds remaining in the Central Account after deposits for items (i) through (ix) above have been paid any remaining amounts will be applied to the payment of the principal of such Component of the Loan then in an Amortization Period or all Components of the Loan corresponding to each Subclass of Securities other than Risk Retention Securities in the event of an Event of

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Default, as applicable, sequentially in order of alphabetical designation of each such Component, and pro rata among any such Components of the same alphabetical designation, based on the Component Principal Balance of each such Component, in each case, in an amount up to the Component Principal Balance of each such Component,

(xi)    eleventh, if any Value Reduction Accrued Interest is outstanding, any Available Funds remaining in the Central Account after deposits for items (i) through (x) above have been paid will be applied to the payment of accrued and unpaid interest on the Components of the Loan corresponding to each Subclass of Securities other than Risk Retention Securities that was not paid as a consequence of a Value Reduction Amount (“Value Reduction Accrued Interest”), sequentially in order of alphabetical designation of such Components, and pro rata among such Components of the same alphabetical designation, based on the amount of Value Reduction Accrued Interest due and payable thereon,

(xii)    twelfth, any Available Funds remaining in the Central Account after deposits for items (i) through (xi) above have been paid will be applied to the payment of any Post-ARD Additional Interest accrued and unpaid on the Components of the Loan corresponding to each Subclass of Securities other than Risk Retention Securities, sequentially in order of alphabetical designation of such Components, and pro rata among such Components of the same alphabetical designation, based on the amount of Post-ARD Additional Interest due and payable thereon,

(xiii)    thirteenth, if a Title Defect Cash Flow Event exists with respect to any Mortgaged Site as of such Due Date, any Available Funds remaining in the Central Account after deposits for items (i) through (xii) above have been paid will be applied to the payment of the principal of all Components of the Loan corresponding to each Subclass of Securities other than Risk Retention Securities, sequentially in order of alphabetical designation of each such Component, and pro rata among any such Components of the same alphabetical designation, based on the Component Principal Balance of each such Component, in each case, in an amount up to the lesser of (x) the greater of (A) 125% of the Allocated Loan Amount with respect to such Mortgaged Site and (B) the amount of principal of such Components the repayment of which is necessary to cause the DSCR to be equal to the DSCR immediately prior to occurrence of such Title Defect Cash Flow Event and (y) the sum of the Component Principal Balances of each such Component,

(xiv)    fourteenth, to the payment of accrued and unpaid interest due on the Components of the Loan corresponding to any Risk Retention Securities (giving effect to any Value Reduction Amount then in effect, but excluding any Value Reduction Accrued Interest), sequentially in order of alphabetical designation, and pro rata among any such Components of the same alphabetical designation, based on the aggregate amount of interest (excluding Post-ARD Additional Interest and Value Reduction Accrued Interest) payable on each such Component,

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(xv)    fifteenth, if such Due Date is the Anticipated Repayment Date for any Component of the Loan corresponding to any Risk Retention Securities and (A) an Amortization Period is not then in effect, (B) no Loan Event of Default has occurred and is continuing, and (C) if the amount of Available Funds remaining in the Central Account after deposits for items (i) through (xiv) above have been paid is sufficient to pay in full the Component Principal Balance of each such Component of the Loan having an Anticipated Repayment Date on such Due Date, then such remaining Available Funds will be applied to the payment of the Component Principal Balance of each such Component of the Loans pro rata, based on the Component Principal Balance of each such Component, in each case in an amount up to the Component Principal Balance of each such Component,

(xvi)    sixteenth, if such Due Date is during the continuation of an Amortization Period with respect to any Component of a Loan corresponding to Risk Retention Securities or a Loan Event of Default, any Available Funds remaining in the Central Account after deposits for items (i) through (xv) above have been paid will be applied to the payment of the principal of such Component of the Loan then in an Amortization Period or all Components of the Loan corresponding to Risk Retention Securities in the event of a Loan Event of Default, as applicable, pro rata among such Components based on the Component Principal Balance of each such Component, in each case, in an amount up to the Component Principal Balance of each such Component,

(xvii)    seventeenth, if any Value Reduction Accrued Interest with respect to any Component of the Loan corresponding to Risk Retention Securities is outstanding, any Available Funds remaining in the Central Account after deposits for items (i) through (xvi) above have been paid will be applied to the payment of accrued and unpaid Value Reduction Accrued Interest on such Components of the Loan pro rata among such Components based on the amount of Value Reduction Accrued Interest due and payable thereon, and

(xviii)    eighteenth, any remaining Available Funds will be distributed to, or at the direction of, the Borrowers.

Section 1.03    Reference to and Effect on Cash Management Agreement.

(a)      Upon the effectiveness hereof, on and after the date hereof, each reference in the Cash Management Agreement to “this Cash Management Agreement”, “hereunder”, “hereof” or words of like import referring to the Cash Management Agreement, and each reference in any other agreement to “the Cash Management Agreement”, “thereunder”, “thereof” or words of like import referring to the Cash Management Agreement, shall mean and be a reference to the Cash Management Agreement as amended hereby.

(b)      Except as specifically amended above, the Cash Management Agreement is and shall continue to be in full force and effect and is hereby ratified and confirmed in all respects.

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(c)      The execution, delivery and effectiveness of this Amendment shall not, except as expressly provided herein, operate as a waiver of any right, power or remedy of any party hereto under the Cash Management Agreement, or constitute a waiver of any provision of any other agreement.

Section 1.04    Effectiveness. This Amendment shall be effective upon delivery of executed signature pages by all parties hereto.

Section 1.05    Governing Law. THIS AMENDMENT AND ANY CLAIM, CONTROVERSY OR DISPUTE ARISING UNDER OR RELATED TO THIS AMENDMENT, THE RELATIONSHIP OF THE PARTIES TO THIS AMENDMENT, AND/OR THE INTERPRETATION AND ENFORCEMENT OF THE RIGHTS AND DUTIES OF THE PARTIES TO THIS AMENDMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS AND DECISIONS OF THE STATE OF NEW YORK, WITHOUT REGARD TO THE CHOICE OF LAW RULES THEREOF. THE PARTIES HERETO INTEND THAT THE PROVISIONS OF SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW SHALL APPLY TO THIS AMENDMENT.

Section 1.06    Severability. In case any provision in this Amendment shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions of this Amendment shall not in any way be affected or impaired thereby.

Section 1.07    Counterparts. This Amendment may be executed in any number of counterparts, each of which so executed shall be deemed to be an original, but all such respective counterparts shall together constitute but one and the same instrument. Delivery of an executed counterpart of a signature page of this Amendment in Portable Document Format (PDF) or by facsimile transmission shall be as effective as delivery of a manually executed original counterpart of this Amendment. The parties agree that this Amendment or any amendment hereto or any other document necessary for the consummation of the transaction contemplated by this Amendment may be accepted, executed or agreed to through the use of an electronic signature in accordance with the Electronic Signatures in Global and National Commerce Act, Title 15, United States Code, Sections 7001 et seq., the Uniform Electronic Transaction Act and any applicable state law. Electronic signature shall mean any electronic symbol or process attached to, or associated with, a contract or other record and adopted by a person with the intent to sign, authenticate or accept such contract or record and shall be the same as handwritten signatures for the purposes of validity, enforceability and admissibility. The words “execution,” “signed,” “signature,” “delivery,” and words of like import in or relating to this Amendment or any document to be signed in connection with this Amendment shall be deemed to include electronic signatures, deliveries or the keeping of records in electronic form.

[SIGNATURE PAGE FOLLOWS]

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IN WITNESS WHEREOF, the Borrowers, the Lender, the Manager, the Agent and the Servicer have caused this Amendment to be duly executed by their respective officers, thereunto duly authorized, all as of the day and year first above written.

BORROWERS:
AMERICAN TOWER ASSET SUB, LLC
By:	/s/ Rodney M. Smith
	Name: Rodney M. Smith
	Title:   Executive Vice President, Chief Financial Officer and Treasurer

AMERICAN TOWER ASSET SUB II, LLC
By:	/s/ Rodney M. Smith
	Name: Rodney M. Smith
	Title: Executive Vice President, Chief Financial Officer and Treasurer

Signature Page to Amendment to

Second Amendment and Restated Cash Management Agreement

LENDER:
U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, not in its individual capacity but solely as Trustee
By:	/s/ Christopher J. Nuxoll
	Name: Christopher J. Nuxoll
	Title: Vice President

Signature Page to Amendment to

Second Amendment and Restated Cash Management Agreement

MANAGER:

SPECTRASITE COMMUNICATIONS, LLC

By: SpectraSite, LLC, its sole manager

By: American Tower Corporation, its sole  manager

By:	/s/ Rodney M. Smith
	Name: Rodney M. Smith
	Title: Executive Vice President, Chief Financial Officer and Treasurer

Signature Page to Amendment to

Second Amendment and Restated Cash Management Agreement

AGENT:
U.S. BANK NATIONAL ASSOCIATION
By:	/s/ Christopher J. Nuxoll
	Name: Christopher J. Nuxoll
	Title: Vice President

Signature Page to Amendment to

Second Amendment and Restated Cash Management Agreement

SERVICER:
MIDLAND LOAN SERVICES, a Division of PNC Bank, National Association
By:	/s/ David A. Eckels
	Name: David A. Eckels
	Title: Senior Vice President

Signature Page to Amendment to

Second Amendment and Restated Cash Management Agreement

EX-10.3

Exhibit 10.3

EXECUTION VERSION

SECOND TRUST AGREEMENT SUPPLEMENT AND AMENDMENT

TO

SECOND AMENDED AND RESTATED TRUST AND SERVICING AGREEMENT

among

AMERICAN TOWER DEPOSITOR SUB, LLC,

as Depositor,

MIDLAND LOAN SERVICES, A DIVISION OF PNC BANK, NATIONAL ASSOCIATION,

as Servicer,

and

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,

as Trustee

dated as of March 13, 2023

TABLE OF CONTENTS

		Page
ARTICLE I
DEFINITIONS AND INCORPORATION BY REFERENCE
Section 1.01	Definitions		2
ARTICLE II
ISSUANCE OF THE SERIES 2023-1 SECURITIES
Section 2.01	Designation of the Securities		3
Section 2.02	Form of Series 2023-1 Securities		4
Section 2.03	Trustee Certification		4
ARTICLE III
AMENDMENT OF THE TRUST AND SERVICING AGREEMENT
Section 3.01	Definitions		4
Section 3.02	Permitted Withdrawals from the Collection Account and the Distribution Account		6
Section 3.03	Servicer Termination Events		9
Section 3.04	Fees and Expenses of Trustee and Custodian		9
ARTICLE IV
GENERAL PROVISIONS
Section 4.01	Governing Law		10
Section 4.02	Severability		10
Section 4.03	Counterparts		10
Section 4.04	Direction to the Servicer		10

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SECOND TRUST AGREEMENT SUPPLEMENT AND AMENDMENT

This SECOND TRUST AGREEMENT SUPPLEMENT AND AMENDMENT TO SECOND AMENDED AND RESTATED TRUST AND SERVICING AGREEMENT (the “Trust Agreement Supplement”) is dated as of March 13, 2023, and entered into by and among American Tower Depositor Sub, LLC (the “Depositor”), U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as successor in interest to U.S. Bank National Association, as trustee (the “Trustee”), and MIDLAND LOAN SERVICES, a Division of PNC Bank, National Association, as servicer (the “Servicer”).

RECITALS

WHEREAS, the Trustee entered into a Trust and Servicing Agreement, dated as of May 4, 2007 (the “Initial Closing Date”), among the Trustee, the Servicer, and the Depositor, as amended and restated by the First Amended and Restated Trust and Servicing Agreement, dated as of March 15, 2013, and as further amended and restated by the Second Amended and Restated Trust and Servicing Agreement, dated as of March 29, 2018 (the “Trust and Servicing Agreement”), among the Trustee, the Servicer and the Depositor, whereby the Trust was created;

WHEREAS, American Tower Asset Sub, LLC, a Delaware limited liability company (“Asset Sub”), and American Tower Asset Sub II, LLC, a Delaware limited liability company (“Asset Sub II”, together with Asset Sub, the “Borrowers”) are Borrowers under that certain Loan and Security Agreement, dated as of the Initial Closing Date (as the same has been amended, restated, supplemented or otherwise modified to the date hereof, the “Initial Loan Agreement”);

WHEREAS, on March 15, 2013, the Borrowers and the Trustee, on behalf of American Tower Trust I (the “Trust”) as lender (in such capacity, the “Lender”), amended and restated the Initial Loan Agreement pursuant to that certain First Amended and Restated Loan and Security Agreement, dated as of March 15, 2013 (the “First Amended and Restated Loan Agreement”), between the Borrowers and the Trustee;

WHEREAS, on March 29, 2018, the Borrowers and the Trustee amended and restated the First Amended and Restated Loan Agreement pursuant to that certain Second Amended and Restated Loan and Security Agreement, dated as of March 29, 2018 (the “Loan Agreement”), between the Borrowers and the Lender;

WHEREAS, the Borrowers have requested, and the Lender has agreed to, a supplement and amendment to the Loan Agreement (the “Second Loan Agreement Supplement”), dated as of the date hereof, between the Borrowers and the Lender;

WHEREAS, the Second Loan Agreement Supplement provides, among other things, for a Mortgage Loan Increase, as defined in the Loan Agreement and pursuant to the terms thereof;

WHEREAS, the Trust and Servicing Agreement provides that, upon a Mortgage Loan Increase and satisfaction of the conditions set forth in Section 3.23 of the Trust and Servicing Agreement, the Trustee is authorized to execute this Trust Agreement Supplement and issue a

Subclass of Additional Securities corresponding to each Component of such Mortgage Loan Increase;

WHEREAS, the Series 2023-1 Securities constitute Securities as defined in the Trust and Servicing Agreement; and

WHEREAS, the Trustee and the Servicer intend these recitals to be a material part of this Agreement.

NOW, THEREFORE, it is mutually covenanted and agreed as follows:

ARTICLE I

DEFINITIONS AND INCORPORATION BY REFERENCE

Section 1.01    Definitions. All defined terms used herein and not defined herein shall have the meanings ascribed to such terms in the Trust and Servicing Agreement. All words and phrases defined in the Trust and Servicing Agreement shall have the same meanings in this Trust Agreement Supplement, except as otherwise appears in this Article. In addition, the following terms have the following meanings in this Trust Agreement Supplement unless the context clearly requires otherwise:

“2023-1 Notes” shall have the meaning ascribed to it in Section 2.03(a) hereof.

“Assumed Final Distribution Date” shall mean, with respect to each of the Series 2023-1A Securities and the Series 2023-1R Securities, the Distribution Date in March 2028.

“Initial Purchasers” shall mean Barclays Capital Inc., J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC, MUFG Securities Americas Inc., RBC Capital Markets, LLC and the other initial purchasers listed on Schedule I to the Purchase Agreement.

“Memorandum” shall mean the offering memorandum, dated March 8, 2023, in respect of the Series 2023-1 Securities, together with all appendices, annexes, exhibits and supplements thereto.

“Pass-Through Rate” shall have the meaning ascribed to it in Section 2.01(b) hereof.

“Purchase Agreement” shall mean, with respect to the Series 2023-1A Securities, the purchase agreement entered into by the Initial Purchasers, SpectraSite Communications, LLC, the Depositor and the Trustee, dated as of March 8, 2023.

“Rated Final Distribution Date” shall mean, with respect to each of the Series 2023–1A Securities and the Series 2023-1R Securities, the Distribution Date in March 2053.

“Rating Agency” means, with respect to the Series 2023-1A Securities, Moody’s or Fitch. If such rating agency or any successor fails to remain in existence, “Rating Agency” shall be deemed to refer to such other nationally recognized statistical rating agency or other comparable

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Person designated by the Trustee, notice of which designation shall be given to the other parties hereto, and specific ratings of Fitch or Moody’s herein referenced shall be deemed to refer to the equivalent ratings of the party so designated.

“Series 2023-1 Securities” shall mean the Series 2023-1A Securities and the Series 2023-1R Securities.

“Series 2023-1A Securities” shall have the meaning ascribed to it in Section 2.01(a) hereof.

“Series 2023-1R Securities” shall have the meaning ascribed to it in Section 2.01(a) hereof.

Words importing the masculine gender include the feminine gender. Words importing persons include firms, associations and corporations. Words importing the singular number include the plural number and vice versa. Additional terms are defined in the body of this Trust Agreement Supplement.

In the event that any term or provision contained herein with respect to the Series 2023-1 Securities shall conflict with or be inconsistent with any term or provision contained in the Trust and Servicing Agreement, the terms and provisions of this Trust Agreement Supplement shall govern.

ARTICLE II

ISSUANCE OF THE SERIES 2023-1 SECURITIES

Section 2.01    Designation of the Securities.

(a)    The Securities to be issued hereunder will be issued in (i) one (1) Subclass hereby designated as the “Series 2023-1A Securities” and (ii) in one (1) Subclass hereby designated as the “Series 2023-1R Securities.” Upon execution of this Trust Agreement Supplement, subject to Section 3.23 of the Trust Agreement, the Trustee shall, upon written direction of the Depositor, execute, and cause the Certificate Registrar to authenticate and deliver to the Initial Purchasers on the date hereof, the Series 2023-1 Securities in authorized denominations.

(b)    Each Subclass of the Series 2023-1 Securities shall have the initial Subclass Principal Balance and ratings set forth opposite such Subclass in the following table:

Subclass of Series 2023-1 Securities	Initial Subclass Principal Balance	Ratings (Moody’s/Fitch)
2023-1A	$1,300,000,000	Aaa(sf)/AAA(sf)
2023-1R	$68,500,000	N/A

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(c)    Each Subclass of the Series 2023-1 Securities shall have the “Pass-Through Rate” set forth opposite such Subclass in the following table:

Subclass of Series 2023-1 Securities	Pass-Through Rate
2023-1A	5.490%
2023-1R	5.735%

Section 2.02    Form of Series 2023-1 Securities. The Series 2023-1A Securities shall be in substantially the form set forth in Schedule I hereto. The Series 2023-1R Securities shall be in substantially the form set forth in Schedule II hereto and shall initially be issued in the form of a Definitive Security.

Section 2.03    Trustee Certification. Pursuant to Section 2.02(f) of the Trust and Servicing Agreement, the Trustee hereby certifies that:

(a)    the Trustee or a Custodian on its behalf is in the possession of (i) the Promissory Note 2023-1A, dated as of the date hereof, made by the Borrowers to the order of the Trustee, in the aggregate principal amount of $1,300,000,000 and (ii) the Promissory Note 2023-1R, dated as of the date hereof, made by the Borrowers to the order of the Trustee, in the aggregate principal amount of $68,500,000 (together, the “2023-1 Notes”); and

(b)    the Trustee or such Custodian on its behalf has reviewed each such 2023-1 Note (or copies thereof) and each such 2023-1 Note (i) appears regular on its face, (ii) appears to have been executed and (iii) purports to relate to the Mortgage Loan.

ARTICLE III

AMENDMENT OF THE TRUST AND SERVICING AGREEMENT

Section 3.01    Definitions.

(a)    The parties hereto agree that the following definitions are hereby added to Section 1.01 of the Trust and Servicing Agreement in the appropriate alphabetical order:

“2018-1 Custodian Fee” means the fee payable monthly to the Custodian on each Distribution Date accruing during each Security Collection Period at the applicable Custodian Fee Rate on the aggregate Component Principal Balance of the 2018-1A Component and the 2018-1R Component of the Mortgage Loan from time to time.

“2018-1 Trustee Fee” means the fee payable monthly to the Trustee on each Distribution Date accruing during each Security Collection Period at the applicable Trustee Fee Rate on the aggregate Component Principal Balance of the 2018-1A Component and the 2018-1R Component of the Mortgage Loan from time to time.

“2023-1 Custodian Fee” means the fee payable monthly to the Custodian on each Distribution Date accruing during each Security Collection Period at the applicable

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Custodian Fee Rate on the aggregate Component Principal Balance of the 2023-1A Component and the 2023-1R Component of the Mortgage Loan from time to time.

“2023-1 Trustee Fee” means the fee payable monthly to the Trustee on each Distribution Date accruing during each Security Collection Period at the applicable Trustee Fee Rate on the aggregate Component Principal Balance of the 2023-1A Component and the 2023-1R Component of the Mortgage Loan from time to time.

“Custodian” means initially U.S. Bank National Association, or any successor thereto.

“Custodian Fee” means the 2018-1 Custodian Fee and the 2023-1 Custodian Fee, collectively, payable to the Custodian pursuant to Section 8.05(b).

“Custodian Fee Rate” means, with respect to the 2018-1 Custodian Fee, 0.0007% per annum, and, with respect to the 2023-1 Custodian Fee, 0.0020% per annum.

(b)     The parties hereto agree that the following definitions in Section 1.01 of the Trust and Servicing Agreement are hereby amended by (i) deleting the stricken text and (ii) inserting the text therein which is double underlined, in each case, in the place where such text appears below:

“Additional Trust Fund Expense” means (a) any unreimbursed Debt Service Advances or unreimbursed Servicing Advances to the Servicer or the Trustee, including Advance Interest thereon, (b) the Servicing Fee, Other Servicing Fees and Additional Servicing Compensation payable to the Servicer, (c) the Trustee Fee, the Custodian Fee and other reimbursements and indemnification payments payable to the Trustee, the Custodian and certain related persons pursuant to Section 8.05(b), (d) other reimbursements and indemnifications payable to the Servicer and certain persons affiliated with them pursuant to Section 3.18 or Section 6.03, (e) any federal, state or local taxes imposed on the Trust Fund (other than taxes described in Sections 10.01(b)(i) or (ii)); and (f) any other costs, expenses and liabilities (other than Servicing Fees, and Trustee Fees and Custodian Fees) that are required to be borne by the Trust or paid from the Trust Fund in accordance with applicable law or the terms of this Agreement.

“Eligible Account” means either (a) an account maintained with a federal or state-chartered depository institution or trust company which is an Eligible Institution, (b) a segregated trust account maintained with the trust department of a federal or state-chartered depository institution or trust company (which may include the Trustee), having corporate trust powers, acting in its fiduciary capacity, and having a combined capital and surplus of at least $50,000,000 and subject to supervision or examination by federal or state authority regarding fiduciary funds on deposit similar to 12 C.F.R. § 9.10(b) and which depository institution or trust company’s long-term debt or deposit obligations are rated at least “A2” by Moody’s (or its equivalent from at least one NRSRO if Moody’s is not a Rating Agency for any Series of Securities) or short-term debt or deposit obligations are rated at least “P-1” by Moody’s (or its equivalent from at least one NRSRO if Moody’s is not a Rating Agent for any Series of Securities), or (c) an account in any

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other insured depository institution reasonably acceptable to the Servicer and the Trustee and for which Rating Agency Confirmation has been obtained; provided that, in the event that any account no longer qualifies as an Eligible Account pursuant to the definition hereof, such account shall be replaced with an Eligible Account within 60 days of such account’s ineligibility.

“Trustee Fee” means the fee designated as such andthe 2018-1 Trustee Fee and the 2023-1 Trustee Fee, collectively, payable to the Trustee pursuant to Section  8.05(a)(b).

“Trustee Fee Rate” means 0.0014%, with respect to the 2018-1 Trustee Fee, 0.0014% per annum, and, with respect to the 2023-1 Trustee Fee, 0.0025% per annum.

“Value Reduction Amount” means, with respect to the Mortgage Loan, an amount (calculated by the Servicer as of the Determination Date as soon as practicable following (A) the Servicer’s reasonable determination that an Event of Default has occurred or is likely to occur or (B) the commencement of an Amortization Period as the result of the failure to pay a Component of the Mortgage Loan in full on or prior to the Anticipated Repayment Date of such Component, and, for so long as such Event of Default (as determined by the Servicer) or such Amortization Period shall be continuing, on each subsequent Determination Date) equal to the positive excess (if any) of: (a) the sum, without duplication, of (i) the aggregate of the outstanding Component Principal Balances of the Mortgage Loan, (ii) to the extent not previously advanced, all accrued but unpaid interest (excluding Post-ARD Additional Interest) on the Mortgage Loan, (iii) all accrued but unpaid Servicing Fees,and Trustee Fees and Custodian Fees, (iv) all related unreimbursed Advances (plus Advance Interest accrued thereon), (v) all other unreimbursed Additional Trust Fund Expenses, and (vi) all currently due and unpaid real estate or personal property taxes and assessments, insurance premiums and, if applicable, ground rents (in each case net of any amounts escrowed therefor), over (b) an amount equal to 90% of the Enterprise Value as most recently determined pursuant to Section 3.19.

Section 3.02    Permitted Withdrawals from the Collection Account and the Distribution Account. The parties hereto agree that Section 3.05 of the Trust and Servicing Agreement is hereby amended by (x) deleting the stricken text and (y) inserting the text therein which is double underlined, in each case, in the place where such text appears below:

(a)    The Servicer may, on or prior to any Servicer Remittance Date, make withdrawals from the Collection Account for any of the following purposes (the order set forth below not constituting an order of priority for such withdrawals):

(i)    to withdraw any sums deposited in error in the Collection Account and pay such sums to Persons entitled thereto;

(ii)    to pay, when due and payable, to the Servicer as compensation, the aggregate unpaid Servicing Fee, the Special Servicing Fee, any Workout Fees or Liquidation Fees and any Other Servicing Fees then owing to it;

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(iii)    to pay or reimburse the Servicer and the Trustee for Advances made by each and not previously reimbursed and interest thereon (provided that the Trustee will have priority with respect to such payment or reimbursement), the right to payment or reimbursement pursuant to this clause (iii) being limited to, in the case of Debt Service Advances, to amounts that represent Late Collections of interest and principal, and in the case of Servicing Advances, to amounts actually paid by the Borrowers in respect of the item for which the Servicing Advance was made (or from Liquidation Proceeds, Insurance Proceeds, Condemnation Proceeds, and Net REO Revenues), except, in each case, for Advances determined to be a Non-Recoverable Debt Servicing Advance or Non-Recoverable Servicing Advance, which are not so limited;

(iv)    to pay the Trustee and itself, in that order, any interest accrued and payable in accordance with Section 3.11 or Section 4.03(c), as applicable, on any Advance made thereby, after such Advance has been reimbursed, out of amounts paid by the Borrowers in respect thereof, and otherwise out of general collections on the Mortgage Loan;

(v)    to reimburse the Trustee and the Servicer for Liquidation Expenses incurred by them in connection with the liquidation of a Site or an REO Property (and not otherwise covered by an Insurance Policy);

(vi)    to pay, reimburse or indemnify the Servicer and, the Trustee and the Custodian for any other amounts payable, reimbursable or indemnifiable pursuant to the terms of the Agreement and not previously paid, reimbursed or indemnified pursuant to Subsection (ii), (iii), (iv) or (v) above or (vii) below;

(vii)    to pay to the Servicer as additional compensation, any income earned (net of losses required to be paid by the Servicer) on the investment of funds deposited in the Collection Account;

(viii)    to pay (or set aside for eventual payment) any and all taxes imposed on the Trust Fund by federal or state governmental authorities to the extent that such taxes have not previously been paid;

(ix)    to pay to any successor manager appointed to manage the REO Properties, if any, a management fee to the extent not paid from the REO Account;

(x)    to pay any other Additional Trust Fund Expense (with respect to Additional Servicing Compensation, to the extent paid by the Borrowers);

(xi)    to transfer, on or before 3:00 p.m. (New York City time) on each Servicer Remittance Date, the Servicer Remittance Amount to the Distribution Account; and

(xii)    to clear and terminate the Collection Account upon the termination of this Agreement.

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If amounts on deposit in the Collection Account at any particular time (after withdrawing any portion of such amounts deposited in the Collection Account in error) are insufficient to satisfy all payments, reimbursements and remittances to be made therefrom as set forth in clauses (ii) through (xi) above, then the corresponding withdrawals from the Collection Account shall be made in the following priority and subject to the following rules: (A) first, to the Servicer, in respect of Additional Trust Fund Expenses payable to it subject to limits set forth herein, (B) second, to the Trustee, in respect of Additional Trust Fund Expenses payable to it subject to limits set forth herein, (C) third, to the Distribution Account, for distribution of amounts payable to the Securityholders and (D) fourth, to the Servicer, any income earned (net of losses required to be paid by the Servicer) on the investment of funds deposited in the Collection Account.

The Servicer shall keep and maintain separate accounting records, on a property-by-property basis when appropriate, in connection with any withdrawal from the Collection Account pursuant to any of clauses (ii) through (xii) above.

(b)    The Trustee shall, from time to time, make withdrawals from the Distribution Account for each of the following purposes, in the following order of priority, to the extent not previously paid:

(i)    first, to pay itself or any of its respective directors, officers, employees and agents any amounts payable or reimbursable to any such Person pursuant to Section 8.05, including the Trustee Fee to the Trustee

(ii) second, to pay to the Custodian or any of its respective directors, officers, employees and agents any amounts payable or reimbursable pursuant to Section 8.05, including the Custodian Fee to the Custodian;

(iii )     second third, to pay (in no order of priority):

(A)     the Certificate Registrar, the Custodian or any of their respective directors, officers, employees and agents, as the case may be, any amounts payable or reimbursable to any such Person pursuant to Sections 8.05(b) and 8.13(a);

(B)    to pay for the cost of the Opinions of Counsel sought by the Trustee as contemplated by Section 11.01(a) or 11.01(c) in connection with any amendment to this Agreement requested by the Trustee which amendment is in furtherance of the rights and interests of Securityholders;

(C)    to pay any and all federal, state and local taxes imposed on the Trust Fund or on the assets or transactions of the Trust Fund, together with all incidental costs and expenses, and any and all expenses relating to tax audits, if and to the extent that either (A) none of the parties hereto are liable therefor pursuant to Section 10.01(b) or (B) any such Person that may be so liable has failed to make the required payment on a timely basis;

(iiiv)    third fourth, to make distributions to the Holders of the Securities on each Distribution Date pursuant to Section 4.01(a); and

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(iv)     fourth fifth, to clear and terminate the Distribution Account at the termination of this Agreement pursuant to Section 9.01.

(c)    The Trustee, the Custodian and the Servicer, as applicable, shall in all cases have a right prior to the Securityholders to any funds on deposit in the Collection Account and the Distribution Account from time to time for the reimbursement or payment of compensation, Advances (with interest thereon at the Prime Rate) and their respective expenses, indemnifications and other reimbursements hereunder or under the Loan Agreement or Cash Management Agreement, but only if and to the extent that such compensation, Advances (with interest) and expenses, indemnifications and other reimbursements are to be reimbursed or paid from such funds on deposit in the Collection Account or the Distribution Account pursuant to the express terms of this Agreement.

Section 3.03    Servicer Termination Events. The parties hereto agree that clause (ix) of the definition of “Servicer Termination Events” in Section 7.01(a) of the Trust and Servicing Agreement is hereby amended by inserting the text therein which is double underlined in the place where such text appears below:

(ix)    the Servicer is no longer “approved” as a master servicer or, if the Mortgage Loan is a Specially Serviced Mortgage Loan, as a special servicer, by any Rating Agency (other than S&P or Fitch) to act in such capacity for commercial mortgage loans or pools of commercial mortgage loans, or, in the case of S&P, the Servicer or the Special Servicer, as the case may be, is no longer listed on S&P’s Select Servicer List as a U.S. Commercial Mortgage Master Servicer or a U.S. Commercial Mortgage Special Servicer, as applicable, or, in the case of Fitch, the Servicer is no longer a Qualified Servicer;

Section 3.04    Fees and Expenses of Trustee and Custodian. The parties hereto agree that Section 8.05(a) of the Trust and Servicing Agreement is hereby amended by inserting the text therein which is double underlined in the place where such text appears below:

(a)    On each Distribution Date, the Trustee shall withdraw from the Distribution Account, prior to any distributions to be made therefrom to Securityholders on such date, and pay to (i) itself all Trustee Fees and (ii) the Custodian all Custodian Fees, in each case, earned in respect of the Mortgage Loan through the end of the then most recently ended Security Collection Period as compensation for all services rendered by the Trustee, respectively, hereunder. The Trustee Fee and the Custodian Fee shall accrue during each Security Collection Period at the applicable Trustee Fee Rate or the applicable Custodian Fee Rate, as the case may be, on a principal amount equal to the Stated Principal Balance of the Mortgage Loan as of the end of the immediately preceding Security Collection Period. The Trustee Fee and the Custodian Fee shall be calculated on the same basis as the Servicing Fee.

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ARTICLE IV

GENERAL PROVISIONS

Section 4.01    Governing Law. THIS TRUST AGREEMENT SUPPLEMENT AND THE SERIES 2023-1 SECURITIES AND ANY CLAIM, CONTROVERSY OR DISPUTE ARISING UNDER OR RELATED TO THIS TRUST AGREEMENT SUPPLEMENT AND THE SERIES 2023-1 SECURITIES, THE RELATIONSHIP OF THE PARTIES TO THIS TRUST AGREEMENT SUPPLEMENT, AND/OR THE INTERPRETATION AND ENFORCEMENT OF THE RIGHTS AND DUTIES OF THE PARTIES TO THIS TRUST AGREEMENT SUPPLEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS AND DECISIONS OF THE STATE OF NEW YORK, WITHOUT REGARD TO THE CHOICE OF LAW RULES THEREOF. THE PARTIES HERETO INTEND THAT THE PROVISIONS OF SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW SHALL APPLY TO THIS TRUST AGREEMENT SUPPLEMENT.

Section 4.02    Severability. In case any provision in this Trust Agreement Supplement shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions of this Trust Agreement Supplement or the Series 2023-1 Securities shall not in any way be affected or impaired thereby.

Section 4.03    Counterparts. This Trust Agreement Supplement may be executed in any number of counterparts, each of which so executed shall be deemed to be an original, but all such respective counterparts shall together constitute but one and the same instrument. Delivery of an executed counterpart of a signature page of this Trust Agreement Supplement in Portable Document Format (PDF) or by facsimile transmission shall be as effective as delivery of a manually executed original counterpart of this Trust Agreement Supplement. The parties agree that this Trust Agreement Supplement or any amendment hereto or any other document necessary for the consummation of the transaction contemplated by this Trust Agreement Supplement may be accepted, executed or agreed to through the use of an electronic signature in accordance with the Electronic Signatures in Global and National Commerce Act, Title 15, United States Code, Sections 7001 et seq., the Uniform Electronic Transaction Act and any applicable state law. Electronic signature shall mean any electronic symbol or process attached to, or associated with, a contract or other record and adopted by a person with the intent to sign, authenticate or accept such contract or record and shall be the same as handwritten signatures for the purposes of validity, enforceability and admissibility. The words “execution,” “signed,” “signature,” “delivery,” and words of like import in or relating to this Trust Agreement Supplement or any document to be signed in connection with this Trust Agreement Supplement shall be deemed to include electronic signatures, deliveries or the keeping of records in electronic form.

Section 4.04    Direction to the Servicer. The Servicer is hereby directed to execute and deliver any amendments to any Mortgage necessary or desirable in connection with the issuance of the 2023-1 Notes, subject to and in accordance with Sections 3.01(b) and 6.03 of the Trust and Servicing Agreement.

[SIGNATURE PAGE FOLLOWS]

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IN WITNESS WHEREOF, the Depositor, the Servicer and the Trustee have caused this Trust Agreement Supplement to be duly executed by their respective officers, thereunto duly authorized, all as of the day and year first above written.

AMERICAN TOWER DEPOSITOR SUB, LLC,
	as Depositor
By:	/s/ Rodney M. Smith
	Name: Rodney M. Smith
	Title: Executive Vice President, Chief Financial Officer and Treasurer

Signature Page for Second Trust Agreement Supplement

MIDLAND LOAN SERVICES, a Division of
	PNC Bank, National Association,
	as Servicer
By:	/s/ David A. Eckels
	Name: David A. Eckels
	Title: Senior Vice President

Signature Page to Second Trust Agreement Supplement

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, not in its individual capacity but solely as Trustee
By:	/s/ Christopher J. Nuxoll
	Name: Christopher J. Nuxoll
	Title: Vice President

Signature Page to Second Trust Agreement Supplement

SCHEDULE I

AMERICAN TOWER TRUST I

SECURED TOWER REVENUE SECURITIES, SERIES 2023-1

SUBCLASS 2023-1A

This is one of a series of secured tower revenue securities (collectively, the “Securities”), issued in multiple subclasses (each, a “Subclass”), which series of Securities evidences the entire beneficial ownership interest in the trust fund (the “Trust Fund”) consisting primarily of a single, monthly pay, non-recourse Mortgage Loan (as defined in the Agreement hereinafter referred to):

REGULATION S GLOBAL SECURITY

Pass-Through Rate:	Subclass Principal Balance of the
5.490%	Subclass 2023-1A Securities as of the Closing
	Date: $1,300,000,000
Closing Date: March 13, 2023	Security Principal Balance of this Security as
	of the Closing Date: $[         ]
First Distribution Date:	Original Principal Balance of the Mortgage
April 2023	Loan as of the Closing Date: $1,894,900,000
Assumed Final Distribution Date: March 2028	Servicer:
	Midland Loan Services, a Division of PNC Bank, National Association
Rated Final Distribution Date: March 2053	Trustee:
	U.S. Bank Trust Company, National Association
Security No.: 2023-1A	CUSIP No.:  U0405D AL3 ISIN No.      USU0405DAL39

UNLESS THIS SECURITY IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE TRUSTEE OR ANY AGENT THEREOF FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY SECURITY ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO 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.

THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT (A) (1) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A “QUALIFIED INSTITUTIONAL BUYER” (A “QUALIFIED INSTITUTIONAL BUYER”) WITHIN THE MEANING OF RULE 144A UNDER THE SECURITIES ACT “RULE 144A”) PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (2) TO AN “ACCREDITED INVESTOR” WITHIN THE MEANING OF PARAGRAPH (1), (2), (3) OR (7) OF RULE 501(a) OF REGULATION D UNDER THE SECURITIES ACT OR AN ENTITY OWNED ENTIRELY BY OTHER ENTITIES THAT FALL WITHIN SUCH PARAGRAPHS IN A TRANSACTION EXEMPT FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT OR (3) TO A NON-”U.S. PERSON” IN AN “OFFSHORE TRANSACTION”, AS DEFINED IN, AND IN ACCORDANCE WITH THE REQUIREMENTS OF RULE 903 OR RULE 904 OF REGULATION S UNDER THE SECURITIES ACT, AND (B) IN ACCORDANCE WITH ALL APPLICABLE SECURITIES LAWS OF THE STATES OF THE UNITED STATES AND ALL APPLICABLE FOREIGN SECURITIES LAWS.

EACH PURCHASER AND HOLDER OF THIS SECURITY OR ANY INTEREST HEREIN SHALL BE DEEMED (OR REQUIRED, IN THE CASE OF A DEFINITIVE SECURITY) TO REPRESENT AND WARRANT THAT EITHER (A) IT IS NOT (I) AN “EMPLOYEE BENEFIT PLAN” WITHIN THE MEANING OF SECTION (3) OF THE UNITED STATES EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED (“ERISA”) THAT IS SUBJECT TO TITLE I OF ERISA, (II) A PLAN, INDIVIDUAL RETIREMENT ACCOUNT OR OTHER ARRANGEMENT THAT IS SUBJECT TO SECTION 4975 OF THE CODE OR PROVISIONS UNDER ANY OTHER U.S. OR NON-U.S. FEDERAL, STATE, LOCAL OR OTHER LAWS OR REGULATIONS THAT ARE SIMILAR TO SUCH PROVISIONS OF ERISA OR THE CODE (COLLECTIVELY, “SIMILAR LAWS”), (III) AN ENTITY WHOSE UNDERLYING ASSETS ARE DEEMED TO CONSTITUTE THE ASSETS OF ANY OF THE FOREGOING DESCRIBED IN CLAUSES (I) AND (II) PURSUANT TO ERISA OR OTHERWISE (EACH OF THE FOREGOING DESCRIBED IN CLAUSES (I), (II) AND (III) BEING REFERRED TO AS A “PLAN”), OR (IV) A PERSON WHO IS DIRECTLY OR INDIRECTLY PURCHASING OR HOLDING THIS SECURITY OR ANY INTEREST THEREIN ON BEHALF OF, AS FIDUCIARY OF, AS TRUSTEE OF, OR WITH ASSETS OF, ANY PLAN OR (B) ITS PURCHASE, HOLDING AND DISPOSITION OF THIS SECURITY

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OR AND ANY INTEREST THEREIN WILL NOT CONSTITUTE OR RESULT IN A NON-EXEMPT PROHIBITED TRANSACTION UNDER SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE, OR A SIMILAR VIOLATION OF ANY APPLICABLE SIMILAR LAWS.

THIS SECURITY DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN AMERICAN TOWER TRUST I, SPECTRASITE COMMUNICATIONS, LLC, MIDLAND LOAN SERVICES, A DIVISION OF PNC BANK, NATIONAL ASSOCIATION, U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, BARCLAYS CAPITAL INC. OR ANY OF THEIR RESPECTIVE AFFILIATES. EXCEPT FOR THE GUARANTY OF THE REPAYMENT OF THE MORTGAGE LOAN PROVIDED BY AMERICAN TOWER HOLDING SUB, LLC (WHOSE ONLY MATERIAL ASSET IS THE EQUITY INTEREST IN AMERICAN TOWER ASSET SUB, LLC AND AMERICAN TOWER ASSET SUB II, LLC), AND BY AMERICAN TOWER GUARANTOR SUB, LLC (WHOSE ONLY MATERIAL ASSET IS THE EQUITY INTEREST IN AMERICAN TOWER HOLDING SUB, LLC), NEITHER THE SECURITIES NOR THE MORTGAGE LOAN IS INSURED OR GUARANTEED BY ANY GOVERNMENTAL AGENCY OR INSTRUMENTALITY OF THE UNITED STATES OR BY ANY OTHER PERSON.

THE OUTSTANDING SECURITY PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ABOVE.

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This certifies that CEDE & CO. is the registered owner of the Subclass Percentage Interest evidenced by this Security (obtained by dividing the principal amount of this Security (its “Security Principal Balance”) as of the Closing Date by the Subclass Principal Balance of the Subclass of Securities to which this Security belongs) in that certain beneficial ownership interest in the Trust Fund evidenced by all the Subclass 2023-1A Securities. The Trust Fund was created pursuant to a Trust and Servicing Agreement, dated as of May 4, 2007, among American Tower Depositor Sub, LLC, as depositor (the “Depositor”), Midland Loan Services, a Division of PNC Bank, National Association (as successor to The Bank of New York Mellon), as servicer (in such capacity, the “Servicer”) and U.S. Bank Trust Company, National Association, successor in interest to U.S. Bank National Association, successor in interest to Bank Of America, National Association, successor by merger to LaSalle Bank National Association, as trustee (the “Trustee”), as amended and restated by the First Amended and Restated Trust and Servicing Agreement, dated as of March 15, 2013, among the Depositor, the Servicer and the Trustee, as further amended and restated by the Second Amended and Restated Trust and Servicing Agreement, dated as of March 29, 2018 (the “Trust Agreement”), among the Depositor, the Servicer and the Trustee, as supplemented by the First Trust Agreement Supplement, dated as of March 29, 2018 among the Depositor, the Servicer and the Trustee, and by the Second Trust Agreement Supplement, dated as of March 13, 2023 (the Trust Agreement, as so amended and restated and so supplemented, the “Agreement”). To the extent not defined herein, capitalized terms used herein have the respective meanings assigned thereto in the Agreement. This Security is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Security by virtue of its acceptance hereof assents and by which such Holder is bound.

Pursuant to the terms of the Agreement, beginning on the first Distribution Date specified above, distributions will be made on the 15th day of each month or, if any such 15th day is not a Business Day, on the next succeeding Business Day (each, a “Distribution Date”) to the Person in whose name this Security is registered at the close of business on the last Business Day of the calendar month immediately preceding the month in which such Distribution Date occurs (the “Record Date”), in an amount equal to the product of the Subclass Percentage Interest evidenced by this Security and the amount required to be distributed to all the Holders of the Subclass of Securities to which this Security belongs on the applicable Distribution Date pursuant to the Agreement. All distributions made under the Agreement on this Security will be made by the Trustee by wire transfer of immediately available funds to the account of the Person entitled thereto at a bank or other entity having appropriate facilities therefor, if this Securityholder shall have provided the Trustee with wiring instructions no later than five Business Days prior to the related Record Date (which wiring instructions may be in the form of a standing order applicable to all subsequent distributions), or otherwise by check mailed to the address of this Securityholder as it appears in the Certificate Register. Notwithstanding the foregoing, the final distribution on this Security will be made in like manner, but only upon presentation and surrender of this Security at the offices of the Certificate Registrar or such other location specified in the notice to the Holder hereof of such final distribution.

This Security shall accrue interest during each Interest Accrual Period on the Security Principal Balance of such Security at a rate per annum equal to the related Pass-Through Rate. Interest on each Subclass of Securities shall be calculated on a 30/360 Basis and, during each Interest Accrual Period, shall accrue at the Pass-Through Rate for such Subclass for such Interest

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Accrual Period on the Subclass Principal Balance thereof outstanding immediately prior to the related Distribution Date.

The Securities are limited in right of distribution to certain collections and recoveries respecting the Mortgage Loan, all as more specifically set forth herein and in the Agreement. As provided in the Agreement, withdrawals from the Distribution Account, the Collection Account, the Lock Box Account and, if established, the REO Account may be made from time to time for purposes other than, and, in certain cases, prior to, distributions to Securityholders, such purposes including the reimbursement of advances made, or certain expenses occurred, with respect to the Mortgage Loan and the payment of interest on such advances and expenses.

Any distribution to the Holder of this Security in reduction of the Security Principal Balance hereof is binding on such Holder and all future Holders of this Security and any Security issued upon the transfer hereof or in exchange therefor or in lieu hereof whether or not notation of such distribution is made upon this Security.

This Security is issuable in fully registered form only without coupons. As provided in the Agreement and subject to certain limitations therein set forth, this Security is exchangeable for new Securities of the same Subclass in authorized denominations evidencing the same aggregate Subclass Percentage Interest, as requested by the Holder surrendering the same.

No transfer, sale, pledge or other disposition of any Security or interest therein shall be made unless that transfer, sale, pledge or other disposition is exempt from the registration and/or qualification requirements of the Securities Act and any applicable state securities laws, or is otherwise made in accordance with the Securities Act and such state securities laws.

If a transfer of any Security that constitutes a Definitive security is to be made without registration under the Securities Act (other than in connection with the initial issuance of the Securities or a transfer of any Security by the Depositor or an Affiliate of the Depositor or a transfer of a Book-Entry Security to a successor Depository as contemplated by Section 5.03(c) of the Agreement), then the Certificate Registrar shall refuse to register such transfer unless it receives (and, upon receipt, may conclusively rely upon) either: (i) a certificate from the Securityholder desiring to effect such transfer substantially in the form attached as Exhibit E-5 or Exhibit E-6 to the Agreement; or (ii) an Opinion of Counsel satisfactory to the Trustee to the effect that such transfer may be made without registration under the Securities Act (which Opinion of Counsel shall not be an expense of the Trust or of the Depositor, the Servicer, the Trustee or the Certificate Registrar in their respective capacities as such), together with the written certification(s) as to the facts surrounding such transfer from the Securityholder desiring to effect such transfer and/or such Securityholder’s prospective Transferee on which such Opinion of Counsel is based.

If a transfer of any interest in a Rule 144A Global Security is to be made without registration under the Securities Act to a Person who will take delivery of such interest in the form of Regulation S Global Security, then the Security Owner desiring to effect such transfer shall be required to deliver to the Trustee (i) a certificate substantially in the form attached as Exhibit E-1 to the Agreement, or (ii) such written orders and instructions as are required under the applicable procedures of the Depository, Clearstream and Euroclear to direct the Trustee to debit the account

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of a Depository Participant by a denomination of interests in such Rule 144A Global Security, and credit the account of a Depository Participant by a denomination of interests in such Regulation S Global Security, that is equal to the denomination of beneficial interests in the Subclass of Securities to be transferred. Upon delivery to the Certificate Registrar of such certification and such orders and instructions, the Trustee, subject to and in accordance with the applicable procedures of the Depository, shall reduce the denomination of the Rule 144A Global Security in respect of the applicable Subclass of Securities and increase the denomination of the Regulation S Global Security for such Subclass by the denomination of the beneficial interest in such Subclass specified in such orders and instructions. If a transfer of any interest in a Rule 144A Global Security is to be made without registration under the Securities Act, the Security Owner desiring to effect such transfer shall be deemed to have represented and warranted that all the certifications set forth in Exhibit E-1 hereto are, with respect to the subject Transfer, true and correct.

Notwithstanding the foregoing, any interest in a Rule 144A Global Security with respect to any Subclass of Book-Entry Securities may be transferred by any Security Owner holding such interest to any Institutional Accredited Investor (other than a Qualified Institutional Buyer) that takes delivery in the form of a Definitive security of the same Subclass as such Rule 144A Global Security upon delivery to the Certificate Registrar and the Trustee of (i) such certifications and/or opinions as are contemplated by the fourth paragraph of Section 5.02(b) of the Agreement and (ii) such written orders and instructions as are required under the applicable procedures of the Depository to direct the Trustee to debit the account of a Depository Participant by the denomination of the transferred interests in such Rule 144A Global Security. Upon delivery to the Certificate Registrar of the certifications and/or opinions contemplated by the fourth paragraph of Section 5.02(b) of the Agreement the Trustee, subject to and accordance with the applicable procedures of the Depository, shall reduce the denomination of the subject Rule 144A Global Security by the denomination of the transferred interests in such Rule 144A Global Security, and shall cause a Definitive security of the same Subclass as such Rule 144A Global Security, and in a denomination equal to the reduction in the denomination of such Rule 144A Global Security, to be executed, authenticated and delivered in accordance with the Agreement to the applicable Transferee.

Except as provided in the next paragraph, no beneficial interest in a Regulation S Global Security for any Subclass of Book-Entry Securities shall be transferred to any Person who takes delivery other than in the form of a beneficial interest in such Regulation S Global Security. On and prior to the Release Date, the Security Owner desiring to effect any Transfer to any Person who takes delivery in the form of a beneficial interest in the Rule 144A Global Security for such Subclass of Securities shall be required to deliver to the Trustee a written certification substantially in the form set forth in Exhibit E-1 hereto including such written orders and instructions as are required under the applicable procedures of the Depository, Clearstream and Euroclear to direct the Trustee to debit the account of a Depository Participant by a denomination of interests in such Regulation S Global Security, and credit the account of a Depository Participant by a denomination of interests in such Rule 144A Global Security, that is equal to the denomination of beneficial interests in the Subclass of Securities to be transferred. Upon delivery to the Certificate Registrar of such certification and orders and instructions, the Trustee, subject to and in accordance with the applicable procedures of the Depository, shall reduce the denomination of the Regulation S Global Security in respect of the applicable Subclass of Securities and increase the denomination of the Rule 144A Global Security for such Subclass by the denomination of the beneficial interest in such

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Subclass specified in such orders and instructions. On or prior to the Release Date, beneficial interests in the Regulation S Global Security for each Subclass of Book-Entry Securities may be held only through Euroclear or Clearstream. The Regulation S Global Security for each Subclass of Book-Entry Securities shall be deposited with the Trustee as custodian for the Depository and registered in the name of Cede & Co. as nominee of the Depository.

None of the Depositor, the Trustee or the Certificate Registrar shall be obligated to register or qualify any Subclass of Securities under the Securities Act or any other securities law or to take any action not otherwise required under the Agreement to permit the transfer of any Security or interest therein without registration or qualification.

With regard to a Security, no transfer of any such Security or interest therein shall be made to any Person, unless such Person represents that either (A) it is not (i) an “employee benefit plan” within the meaning of Section (3) of ERISA that is subject to Title I of ERISA, (ii) a plan, individual retirement account or other arrangement that is subject to Section 4975 of the Code or provisions under any other U.S. or non-U.S. federal, state, local or other laws or regulations that are similar to such provisions of ERISA or the Code (collectively, “Similar Laws”), (iii) an entity whose underlying assets are deemed to constitute the assets of any of the foregoing described in clauses (i) and (ii) pursuant to ERISA or otherwise (each of the foregoing described in clauses (i), (ii) and (iii) being referred to as a “Plan”), or (iv) a person who is directly or indirectly purchasing or holding the Security or any interest therein on behalf of, as fiduciary of, as trustee of, or with assets of, any Plan or (B) its purchase, holding and disposition of such Security or and any interest therein will not constitute or result in a non-exempt prohibited transaction under Section 406 of ERISA or Section 4975 of the Code, or a similar violation of any applicable Similar Laws. Each Transferee of a Definitive security must provide the required representation and warranty, and each Transferee of an interest in a Book Entry Security will be deemed to have made the representation and warranty, in the preceding sentence. No transfer of any Security shall be made to any Person except in accordance with the provisions of this paragraph.

No service charge will be imposed for any transfer or exchange of this Security, but the Trustee or the Certificate Registrar may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any transfer or exchange of this Security.

Notwithstanding the foregoing, for so long as this Security is registered in the name of Cede & Co. or in such other name as is requested by an authorized representative of DTC, transfers of interests in this Security shall be made through the book-entry facilities of DTC, and accordingly, this Security shall constitute a Book-Entry Security.

The Agreement may be amended from time to time by the mutual agreement of the parties thereto, with the consent of the Holders of Securities entitled to not less than 51% of the Voting Rights allocated to each of the affected Classes, for the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of the Agreement or of modifying in any manner the rights of the Holders of Securities; provided, however, that no such amendment shall (i) reduce in any manner the amount of, or delay the timing of, payments received or advanced on the Mortgage Loan and/or any REO Properties which are required to be distributed

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on any Security, without the consent of the Holder of such Security, (ii) adversely affect in any material respect the interests of the Holders of any Class of Securities in a manner other than as described in clause (i) above, without the consent of the Holders of all Securities of such Class, or (iii) modify (A) the provisions of Section 11.01 of the Agreement, (B) any percentage of the Voting Rights specified in any other Section of the Agreement or (C) the definition of “Servicing Standard”, without the consent of the Holders of all Securities then outstanding. Notwithstanding any other provision of the Agreement, for purposes of the giving or withholding of consents pursuant to Section 11.01 of the Agreement, Securities registered in the name of the Depositor or any Affiliate of the Depositor shall be entitled to the same Voting Rights with respect to the matters described above as they would if registered in the name of any other Person. The Trustee shall not consent to any amendment to the Agreement unless it shall first have obtained or been furnished with an Opinion of Counsel (at the expense of the party requesting the amendment, or, if such amendment is requested by the Trustee with the consent of the Depositor (which consent shall not be unreasonably withheld), at the expense of the Trust Fund) to the effect that neither such amendment nor the exercise of any power granted to any party thereto in accordance with such amendment will result in an Adverse Tax Status Event. In addition, prior to the execution of any amendment to the Agreement, the Trustee and the Servicer shall be entitled to receive and rely upon an Opinion of Counsel stating that the execution of such amendment is authorized or permitted by the Agreement. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the holders of any of the Securities.

Unless the certificate of authentication hereon has been executed by the Certificate Registrar, by manual signature, this Security shall not be entitled to any benefit under the Agreement or be valid for any purpose.

The registered Holder hereof, by its acceptance hereof, agrees that it will look solely to the Trust Fund (to the extent of its rights therein) for distributions hereunder.

This Security shall be construed in accordance with the substantive laws of the State of New York applicable to agreements made and to be performed entirely in said State, and the obligations, rights and remedies of the Holder hereof shall be determined in accordance with such laws.

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IN WITNESS WHEREOF, the Trustee has duly executed this Security in its capacity as the Trustee.

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, not in its individual capacity but solely as Trustee
By:
	Authorized Officer

CERTIFICATE OF AUTHENTICATION

This is one of the Subclass 2023-1A Securities referred to in the within-mentioned Agreement.

Dated:                         , 2023

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, not in its individual capacity but solely as Certificate Registrar
By:
	Authorized Officer

Signature Page for Reg S Specimen Certificate, 2023-1A

ASSIGNMENT FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s) unto (please print or typewrite name and address including postal zip code and assignee) the beneficial ownership interest in the Trust Fund evidenced by the within Secured Tower Revenue Security and hereby authorizes(s) the registration of transfer of such interest to assignee on the Certificate Register of the Trust Fund. I (we) further direct the Certificate Registrar to issue a new Secured Tower Revenue Security of a like Subclass Percentage Interest and Subclass to the above named assignee and deliver such Secured Tower Revenue Security to the following address:
Dated:  [                     ]
	Signature by or on behalf of Assignor
	Signature Guaranteed

DISTRIBUTION INSTRUCTIONS

The Assignee should include the following for purposes of distribution:

Distributions shall, if permitted, be made by wire transfer or otherwise, in immediately available funds, to                                      for the account of                                     .

Distributions made by check (such check to be made payable to                                     ) and all applicable statements and notices should be mailed to                                     .

This information is provided by                                      the Assignee named above, or                                     , as its agent.

SCHEDULE A

SCHEDULE OF EXCHANGES IN GLOBAL SECURITY

The following exchanges of a part of this Global Security have been made:

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

AMERICAN TOWER TRUST I

SECURED TOWER REVENUE SECURITIES, SERIES 2023-1

SUBCLASS 2023-1A

This is one of a series of secured tower revenue securities (collectively, the “Securities”), issued in multiple subclasses (each, a “Subclass”), which series of Securities evidences the entire beneficial ownership interest in the trust fund (the “Trust Fund”) consisting primarily of a single, monthly pay, non-recourse Mortgage Loan (as defined in the Agreement hereinafter referred to):

RULE 144A GLOBAL SECURITY

Pass-Through Rate: 5.490%	Subclass Principal Balance of the Subclass 2023-1A Securities as of the Closing Date: $1,300,000,000
Closing Date: March 13, 2023	Security Principal Balance of this Security as of the Closing Date: $[            ]
First Distribution Date:	Original Principal Balance of the Mortgage
April 2023	Loan as of the Closing Date: $1,894,900,000
Assumed Final Distribution Date: March 2028	Servicer:
	Midland Loan Services, a Division of PNC Bank, National Association
Rated Final Distribution Date: March 2053	Trustee:
	U.S. Bank Trust Company, National Association
Security No.: 2023-1A	CUSIP No.: 03027W AM4 ISIN No.:     US03027WAM47

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UNLESS THIS SECURITY IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE TRUSTEE OR ANY AGENT THEREOF FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY SECURITY ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO 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.

THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT (A) (1) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A “QUALIFIED INSTITUTIONAL BUYER” (A “QUALIFIED INSTITUTIONAL BUYER”) WITHIN THE MEANING OF RULE 144A UNDER THE SECURITIES ACT “RULE 144A”) PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (2) TO AN “ACCREDITED INVESTOR” WITHIN THE MEANING OF PARAGRAPH (1), (2), (3) OR (7) OF RULE 501(a) OF REGULATION D UNDER THE SECURITIES ACT OR AN ENTITY OWNED ENTIRELY BY OTHER ENTITIES THAT FALL WITHIN SUCH PARAGRAPHS IN A TRANSACTION EXEMPT FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT OR (3) TO A NON-”U.S. PERSON” IN AN “OFFSHORE TRANSACTION”, AS DEFINED IN, AND IN ACCORDANCE WITH THE REQUIREMENTS OF RULE 903 OR RULE 904 OF REGULATION S UNDER THE SECURITIES ACT, AND (B) IN ACCORDANCE WITH ALL APPLICABLE SECURITIES LAWS OF THE STATES OF THE UNITED STATES AND ALL APPLICABLE FOREIGN SECURITIES LAWS.

EACH PURCHASER AND HOLDER OF THIS SECURITY OR ANY INTEREST HEREIN SHALL BE DEEMED (OR REQUIRED, IN THE CASE OF A DEFINITIVE SECURITY) TO REPRESENT AND WARRANT THAT EITHER (A) IT IS NOT (I) AN “EMPLOYEE BENEFIT PLAN” WITHIN THE MEANING OF SECTION (3) OF THE UNITED STATES EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED (“ERISA”) THAT IS SUBJECT TO TITLE I OF ERISA, (II) A PLAN, INDIVIDUAL RETIREMENT ACCOUNT OR OTHER ARRANGEMENT THAT IS SUBJECT TO SECTION 4975 OF THE CODE OR PROVISIONS UNDER ANY OTHER U.S. OR NON-U.S. FEDERAL, STATE, LOCAL OR OTHER LAWS OR REGULATIONS THAT ARE SIMILAR TO SUCH PROVISIONS OF ERISA OR THE CODE (COLLECTIVELY, “SIMILAR LAWS”), (III) AN ENTITY WHOSE UNDERLYING ASSETS ARE DEEMED TO CONSTITUTE THE ASSETS OF ANY OF THE FOREGOING DESCRIBED IN CLAUSES (I) AND (II) PURSUANT TO ERISA OR OTHERWISE (EACH OF THE FOREGOING DESCRIBED IN CLAUSES (I), (II) AND (III) BEING REFERRED TO AS A “PLAN”), OR (IV) A PERSON WHO IS DIRECTLY OR INDIRECTLY PURCHASING OR HOLDING THIS SECURITY OR ANY INTEREST THEREIN ON BEHALF OF, AS FIDUCIARY OF, AS TRUSTEE OF, OR WITH ASSETS OF, ANY PLAN OR (B) ITS PURCHASE, HOLDING AND DISPOSITION OF THIS SECURITY OR AND ANY INTEREST THEREIN WILL NOT CONSTITUTE OR RESULT IN A NON-

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EXEMPT PROHIBITED TRANSACTION UNDER SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE, OR A SIMILAR VIOLATION OF ANY APPLICABLE SIMILAR LAWS.

THIS SECURITY DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN AMERICAN TOWER TRUST I, SPECTRASITE COMMUNICATIONS, LLC, MIDLAND LOAN SERVICES, A DIVISION OF PNC BANK, NATIONAL ASSOCIATION, U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, BARCLAYS CAPITAL INC. OR ANY OF THEIR RESPECTIVE AFFILIATES. EXCEPT FOR THE GUARANTY OF THE REPAYMENT OF THE MORTGAGE LOAN PROVIDED BY AMERICAN TOWER HOLDING SUB, LLC (WHOSE ONLY MATERIAL ASSET IS THE EQUITY INTEREST IN AMERICAN TOWER ASSET SUB, LLC AND AMERICAN TOWER ASSET SUB II, LLC), AND BY AMERICAN TOWER GUARANTOR SUB, LLC (WHOSE ONLY MATERIAL ASSET IS THE EQUITY INTEREST IN AMERICAN TOWER HOLDING SUB, LLC), NEITHER THE SECURITIES NOR THE MORTGAGE LOAN IS INSURED OR GUARANTEED BY ANY GOVERNMENTAL AGENCY OR INSTRUMENTALITY OF THE UNITED STATES OR BY ANY OTHER PERSON.

THE OUTSTANDING SECURITY PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ABOVE.

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This certifies that CEDE & CO. is the registered owner of the Subclass Percentage Interest evidenced by this Security (obtained by dividing the principal amount of this Security (its “Security Principal Balance”) as of the Closing Date by the Subclass Principal Balance of the Subclass of Securities to which this Security belongs) in that certain beneficial ownership interest in the Trust Fund evidenced by all the Subclass 2023-1A Securities. The Trust Fund was created pursuant to a Trust and Servicing Agreement, dated as of May 4, 2007, among American Tower Depositor Sub, LLC, as depositor (the “Depositor”), Midland Loan Services, a Division of PNC Bank, National Association (as successor to The Bank of New York Mellon), as servicer (in such capacity, the “Servicer”) and U.S. Bank Trust Company, National Association, successor in interest to U.S. Bank National Association, successor in interest to Bank Of America, National Association, successor by merger to LaSalle Bank National Association, as trustee (the “Trustee”), as amended and restated by the First Amended and Restated Trust and Servicing Agreement, dated as of March 15, 2013, among the Depositor, the Servicer and the Trustee, as further amended and restated by the Second Amended and Restated Trust and Servicing Agreement, dated as of March 29, 2018 (the “Trust Agreement”), among the Depositor, the Servicer and the Trustee, as supplemented by the First Trust Agreement Supplement, dated as of March 29, 2018 among the Depositor, the Servicer and the Trustee, and by the Second Trust Agreement Supplement, dated as of March 13, 2023 (the Trust Agreement, as so amended and restated and so supplemented, the “Agreement”). To the extent not defined herein, capitalized terms used herein have the respective meanings assigned thereto in the Agreement. This Security is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Security by virtue of its acceptance hereof assents and by which such Holder is bound.

Pursuant to the terms of the Agreement, beginning on the first Distribution Date specified above, distributions will be made on the 15th day of each month or, if any such 15th day is not a Business Day, on the next succeeding Business Day (each, a “Distribution Date”) to the Person in whose name this Security is registered at the close of business on the last Business Day of the calendar month immediately preceding the month in which such Distribution Date occurs (the “Record Date”), in an amount equal to the product of the Subclass Percentage Interest evidenced by this Security and the amount required to be distributed to all the Holders of the Subclass of Securities to which this Security belongs on the applicable Distribution Date pursuant to the Agreement. All distributions made under the Agreement on this Security will be made by the Trustee by wire transfer of immediately available funds to the account of the Person entitled thereto at a bank or other entity having appropriate facilities therefor, if this Securityholder shall have provided the Trustee with wiring instructions no later than five Business Days prior to the related Record Date (which wiring instructions may be in the form of a standing order applicable to all subsequent distributions), or otherwise by check mailed to the address of this Securityholder as it appears in the Certificate Register. Notwithstanding the foregoing, the final distribution on this Security will be made in like manner, but only upon presentation and surrender of this Security at the offices of the Certificate Registrar or such other location specified in the notice to the Holder hereof of such final distribution.

This Security shall accrue interest during each Interest Accrual Period on the Security Principal Balance of such Security at a rate per annum equal to the related Pass-Through Rate. Interest on each Subclass of Securities shall be calculated on a 30/360 Basis and, during each Interest Accrual Period, shall accrue at the Pass-Through Rate for such Subclass for such Interest

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Accrual Period on the Subclass Principal Balance thereof outstanding immediately prior to the related Distribution Date.

The Securities are limited in right of distribution to certain collections and recoveries respecting the Mortgage Loan, all as more specifically set forth herein and in the Agreement. As provided in the Agreement, withdrawals from the Distribution Account, the Collection Account, the Lock Box Account and, if established, the REO Account may be made from time to time for purposes other than, and, in certain cases, prior to, distributions to Securityholders, such purposes including the reimbursement of advances made, or certain expenses occurred, with respect to the Mortgage Loan and the payment of interest on such advances and expenses.

Any distribution to the Holder of this Security in reduction of the Security Principal Balance hereof is binding on such Holder and all future Holders of this Security and any Security issued upon the transfer hereof or in exchange therefor or in lieu hereof whether or not notation of such distribution is made upon this Security.

This Security is issuable in fully registered form only without coupons. As provided in the Agreement and subject to certain limitations therein set forth, this Security is exchangeable for new Securities of the same Subclass in authorized denominations evidencing the same aggregate Subclass Percentage Interest, as requested by the Holder surrendering the same.

No transfer, sale, pledge or other disposition of any Security or interest therein shall be made unless that transfer, sale, pledge or other disposition is exempt from the registration and/or qualification requirements of the Securities Act and any applicable state securities laws, or is otherwise made in accordance with the Securities Act and such state securities laws.

If a transfer of any Security that constitutes a Definitive security is to be made without registration under the Securities Act (other than in connection with the initial issuance of the Securities or a transfer of any Security by the Depositor or an Affiliate of the Depositor or a transfer of a Book-Entry Security to a successor Depository as contemplated by Section 5.03(c) of the Agreement), then the Certificate Registrar shall refuse to register such transfer unless it receives (and, upon receipt, may conclusively rely upon) either: (i) a certificate from the Securityholder desiring to effect such transfer substantially in the form attached as Exhibit E-5 or Exhibit E-6 to the Agreement; or (ii) an Opinion of Counsel satisfactory to the Trustee to the effect that such transfer may be made without registration under the Securities Act (which Opinion of Counsel shall not be an expense of the Trust or of the Depositor, the Servicer, the Trustee, or the Certificate Registrar in their respective capacities as such), together with the written certification(s) as to the facts surrounding such transfer from the Securityholder desiring to effect such transfer and/or such Securityholder’s prospective Transferee on which such Opinion of Counsel is based.

If a transfer of any interest in a Rule 144A Global Security is to be made without registration under the Securities Act to a Person who will take delivery of such interest in the form of Regulation S Global Security, then the Security Owner desiring to effect such transfer shall be required to deliver to the Trustee (i) a certificate substantially in the form attached as Exhibit E-1 to the Agreement, or (ii) such written orders and instructions as are required under the applicable procedures of the Depository, Clearstream and Euroclear to direct the Trustee to debit the account

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of a Depository Participant by a denomination of interests in such Rule 144A Global Security, and credit the account of a Depository Participant by a denomination of interests in such Regulation S Global Security, that is equal to the denomination of beneficial interests in the Subclass of Securities to be transferred. Upon delivery to the Certificate Registrar of such certification and such orders and instructions, the Trustee, subject to and in accordance with the applicable procedures of the Depository, shall reduce the denomination of the Rule 144A Global Security in respect of the applicable Subclass of Securities and increase the denomination of the Regulation S Global Security for such Subclass by the denomination of the beneficial interest in such Subclass specified in such orders and instructions. If a transfer of any interest in a Rule 144A Global Security is to be made without registration under the Securities Act, the Security Owner desiring to effect such transfer shall be deemed to have represented and warranted that all the certifications set forth in Exhibit E-1 hereto are, with respect to the subject Transfer, true and correct.

Notwithstanding the foregoing, any interest in a Rule 144A Global Security with respect to any Subclass of Book-Entry Securities may be transferred by any Security Owner holding such interest to any Institutional Accredited Investor (other than a Qualified Institutional Buyer) that takes delivery in the form of a Definitive security of the same Subclass as such Rule 144A Global Security upon delivery to the Certificate Registrar and the Trustee of (i) such certifications and/or opinions as are contemplated by the fourth paragraph of Section 5.02(b) of the Agreement and (ii) such written orders and instructions as are required under the applicable procedures of the Depository to direct the Trustee to debit the account of a Depository Participant by the denomination of the transferred interests in such Rule 144A Global Security. Upon delivery to the Certificate Registrar of the certifications and/or opinions contemplated by the fourth paragraph of Section 5.02(b) of the Agreement the Trustee, subject to and accordance with the applicable procedures of the Depository, shall reduce the denomination of the subject Rule 144A Global Security by the denomination of the transferred interests in such Rule 144A Global Security, and shall cause a Definitive security of the same Subclass as such Rule 144A Global Security, and in a denomination equal to the reduction in the denomination of such Rule 144A Global Security, to be executed, authenticated and delivered in accordance with the Agreement to the applicable Transferee.

Except as provided in the next paragraph, no beneficial interest in a Regulation S Global Security for any Subclass of Book-Entry Securities shall be transferred to any Person who takes delivery other than in the form of a beneficial interest in such Regulation S Global Security. On and prior to the Release Date, the Security Owner desiring to effect any Transfer to any Person who takes delivery in the form of a beneficial interest in the Rule 144A Global Security for such Subclass of Securities shall be required to deliver to the Trustee a written certification substantially in the form set forth in Exhibit E-1 hereto including such written orders and instructions as are required under the applicable procedures of the Depository, Clearstream and Euroclear to direct the Trustee to debit the account of a Depository Participant by a denomination of interests in such Regulation S Global Security, and credit the account of a Depository Participant by a denomination of interests in such Rule 144A Global Security, that is equal to the denomination of beneficial interests in the Subclass of Securities to be transferred. Upon delivery to the Certificate Registrar of such certification and orders and instructions, the Trustee, subject to and in accordance with the applicable procedures of the Depository, shall reduce the denomination of the Regulation S Global Security in respect of the applicable Subclass of Securities and increase the denomination of the Rule 144A Global Security for such Subclass by the denomination of the beneficial interest in such

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Subclass specified in such orders and instructions. On or prior to the Release Date, beneficial interests in the Regulation S Global Security for each Subclass of Book-Entry Securities may be held only through Euroclear or Clearstream. The Regulation S Global Security for each Subclass of Book-Entry Securities shall be deposited with the Trustee as custodian for the Depository and registered in the name of Cede & Co. as nominee of the Depository.

None of the Depositor, the Trustee or the Certificate Registrar shall be obligated to register or qualify any Subclass of Securities under the Securities Act or any other securities law or to take any action not otherwise required under the Agreement to permit the transfer of any Security or interest therein without registration or qualification.

With regard to a Security, no transfer of any such Security or interest therein shall be made to any, Person unless Person represents that represents that either (A) it is not (i) an “employee benefit plan” within the meaning of Section (3) of ERISA that is subject to Title I of ERISA, (ii) a plan, individual retirement account or other arrangement that is subject to Section 4975 of the Code or provisions under any other U.S. or non-U.S. federal, state, local or other laws or regulations that are similar to such provisions of ERISA or the Code (collectively, “Similar Laws”), (iii) an entity whose underlying assets are deemed to constitute the assets of any of the foregoing described in clauses (i) and (ii) pursuant to ERISA or otherwise (each of the foregoing described in clauses (i), (ii) and (iii) being referred to as a “Plan”), or (iv) a person who is directly or indirectly purchasing or holding such Offered Securities or any interest therein on behalf of, as fiduciary of, as trustee of, or with assets of, any Plan or (B) its purchase, holding and disposition of such Offered Securities or and any interest therein will not constitute or result in a non-exempt prohibited transaction under Section 406 of ERISA or Section 4975 of the Code, or a similar violation of any applicable Similar Laws. Each Transferee of a Definitive security must provide the required representation and warranty, and each Transferee of an interest in a Book-Entry Security will be deemed to have the representation and warrant, in the preceding sentence. No transfer of any Security shall be made to any Person except in accordance with the provisions of this paragraph.

No service charge will be imposed for any transfer or exchange of this Security, but the Trustee or the Certificate Registrar may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any transfer or exchange of this Security.

Notwithstanding the foregoing, for so long as this Security is registered in the name of Cede & Co. or in such other name as is requested by an authorized representative of DTC, transfers of interests in this Security shall be made through the book-entry facilities of DTC, and accordingly, this Security shall constitute a Book-Entry Security.

The Agreement may be amended from time to time by the mutual agreement of the parties thereto, with the consent of the Holders of Securities entitled to not less than 51% of the Voting Rights allocated to each of the affected Classes, for the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of the Agreement or of modifying in any manner the rights of the Holders of Securities; provided, however, that no such amendment shall (i) reduce in any manner the amount of, or delay the timing of, payments received or advanced on the Mortgage Loan and/or any REO Properties which are required to be distributed

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on any Security, without the consent of the Holder of such Security, (ii) adversely affect in any material respect the interests of the Holders of any Class of Securities in a manner other than as described in clause (i) above, without the consent of the Holders of all Securities of such Class, or (iii) modify (A) the provisions of Section 11.01 of the Agreement, (B) any percentage of the Voting Rights specified in any other Section of the Agreement or (C) the definition of “Servicing Standard”, without the consent of the Holders of all Securities then outstanding. Notwithstanding any other provision of the Agreement, for purposes of the giving or withholding of consents pursuant to Section 11.01 of the Agreement, Securities registered in the name of the Depositor or any Affiliate of the Depositor shall be entitled to the same Voting Rights with respect to the matters described above as they would if registered in the name of any other Person. The Trustee shall not consent to any amendment to the Agreement unless it shall first have obtained or been furnished with an Opinion of Counsel (at the expense of the party requesting the amendment, or, if such amendment is requested by the Trustee with the consent of the Depositor (which consent shall not be unreasonably withheld), at the expense of the Trust Fund) to the effect that neither such amendment nor the exercise of any power granted to any party thereto in accordance with such amendment will result in an Adverse Tax Status Event. In addition, prior to the execution of any amendment to the Agreement, the Trustee and the Servicer shall be entitled to receive and rely upon an Opinion of Counsel stating that the execution of such amendment is authorized or permitted by the Agreement. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the holders of any of the Securities.

Unless the certificate of authentication hereon has been executed by the Certificate Registrar, by manual signature, this Security shall not be entitled to any benefit under the Agreement or be valid for any purpose.

The registered Holder hereof, by its acceptance hereof, agrees that it will look solely to the Trust Fund (to the extent of its rights therein) for distributions hereunder.

This Security shall be construed in accordance with the substantive laws of the State of New York applicable to agreements made and to be performed entirely in said State, and the obligations, rights and remedies of the Holder hereof shall be determined in accordance with such laws.

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IN WITNESS WHEREOF, the Trustee has duly executed this Security in its capacity as the Trustee.

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, not in its individual capacity but solely as Trustee

By:

Authorized Officer

CERTIFICATE OF AUTHENTICATION

This is one of the Subclass 2023-1A Securities referred to in the within-mentioned Agreement.

Dated:                      , 2023

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, not in its individual capacity but solely as Certificate Registrar
By:
	Authorized Officer

Signature Page for Reg 144A Specimen Certificate, 2023-1A

ASSIGNMENT

FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s) unto

(please print or typewrite name and address including postal zip code and assignee)

the beneficial ownership interest in the Trust Fund evidenced by the within Secured Tower Revenue Security and hereby authorizes(s) the registration of transfer of such interest to assignee on the Certificate Register of the Trust Fund.

I (we) further direct the Certificate Registrar to issue a new Secured Tower Revenue Security of a like Subclass Percentage Interest and Subclass to the above named assignee and deliver such Secured Tower Revenue Security to the following address:                                                                                                                                                                                                   

[            ]

Signature by or on behalf of Assignor

Signature Guaranteed

DISTRIBUTION INSTRUCTIONS

The Assignee should include the following for purposes of distribution:

Distributions shall, if permitted, be made by wire transfer or otherwise, in immediately available funds, to                              for the account of                             .

Distributions made by check (such check to be made payable to                                 ) and all applicable statements and notices should be mailed to                                 .

This information is provided by                              the Assignee named above, or                             , as its agent.

SCHEDULE A

SCHEDULE OF EXCHANGES IN GLOBAL SECURITY

The following exchanges of a part of this Global Security have been made:

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

SCHEDULE II

AMERICAN TOWER TRUST I

SECURED TOWER REVENUE SECURITIES, SERIES 2023-1

SUBCLASS 2023-1R

This is one of a series of secured tower revenue securities (collectively, the “Securities”), issued in multiple subclasses (each, a “Subclass”), which series of Securities evidences the entire beneficial ownership interest in the trust fund (the “Trust Fund”) consisting primarily of a single, monthly pay, non-recourse Mortgage Loan (as defined in the Agreement hereinafter referred to):

DEFINITIVE SECURITY

Pass-Through Rate:	Subclass Principal Balance of the
5.735%	Subclass 2023-1R Securities as of the Closing
	Date: $68,500,000
Closing Date: March 13, 2023	Security Principal Balance of this Security as
	of the Closing Date: $68,500,000
First Distribution Date:	Original Principal Balance of the Mortgage
April 2023	Loan as of the Closing Date: $1,894,900,000
Assumed Final Distribution Date: March 2028	Servicer:
	Midland Loan Services, a Division of PNC Bank, National Association
Rated Final Distribution Date: March 2053	Trustee:
	U.S. Bank Trust Company, National Association
Security No.: 2023-1R

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THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT (A) (1) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A “QUALIFIED INSTITUTIONAL BUYER” (A “QUALIFIED INSTITUTIONAL BUYER”) WITHIN THE MEANING OF RULE 144A UNDER THE SECURITIES ACT “RULE 144A”) PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER IN A TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (2) TO AN “ACCREDITED INVESTOR” WITHIN THE MEANING OF PARAGRAPH (1), (2), (3) OR (7) OF RULE 501(a) OF REGULATION D UNDER THE SECURITIES ACT OR AN ENTITY OWNED ENTIRELY BY OTHER ENTITIES THAT FALL WITHIN SUCH PARAGRAPHS IN A TRANSACTION EXEMPT FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT OR (3) TO A NON-”U.S. PERSON” IN AN “OFFSHORE TRANSACTION”, AS DEFINED IN, AND IN ACCORDANCE WITH THE REQUIREMENTS OF RULE 903 OR RULE 904 OF REGULATION S UNDER THE SECURITIES ACT, AND (B) IN ACCORDANCE WITH ALL APPLICABLE SECURITIES LAWS OF THE STATES OF THE UNITED STATES AND ALL APPLICABLE FOREIGN SECURITIES LAWS.

EACH PURCHASER AND HOLDER OF THIS SECURITY OR ANY INTEREST HEREIN SHALL BE DEEMED (OR REQUIRED, IN THE CASE OF A DEFINITIVE SECURITY) TO REPRESENT AND WARRANT THAT EITHER (A) IT IS NOT (I) AN “EMPLOYEE BENEFIT PLAN” WITHIN THE MEANING OF SECTION (3) OF THE UNITED STATES EMPLOYEE RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED (“ERISA”) THAT IS SUBJECT TO TITLE I OF ERISA, (II) A PLAN, INDIVIDUAL RETIREMENT ACCOUNT OR OTHER ARRANGEMENT THAT IS SUBJECT TO SECTION 4975 OF THE CODE OR PROVISIONS UNDER ANY OTHER U.S. OR NON-U.S. FEDERAL, STATE, LOCAL OR OTHER LAWS OR REGULATIONS THAT ARE SIMILAR TO SUCH PROVISIONS OF ERISA OR THE CODE (COLLECTIVELY, “SIMILAR LAWS”), (III) AN ENTITY WHOSE UNDERLYING ASSETS ARE DEEMED TO CONSTITUTE THE ASSETS OF ANY OF THE FOREGOING DESCRIBED IN CLAUSES (I) AND (II) PURSUANT TO ERISA OR OTHERWISE (EACH OF THE FOREGOING DESCRIBED IN CLAUSES (I), (II) AND (III) BEING REFERRED TO AS A “PLAN”), OR (IV) A PERSON WHO IS DIRECTLY OR INDIRECTLY PURCHASING OR HOLDING THIS SECURITY OR ANY INTEREST THEREIN ON BEHALF OF, AS FIDUCIARY OF, AS TRUSTEE OF, OR WITH ASSETS OF, ANY PLAN OR (B) ITS PURCHASE, HOLDING AND DISPOSITION OF THIS SECURITY OR AND ANY INTEREST THEREIN WILL NOT CONSTITUTE OR RESULT IN A NON-EXEMPT PROHIBITED TRANSACTION UNDER SECTION 406 OF ERISA OR SECTION 4975 OF THE CODE, OR A SIMILAR VIOLATION OF ANY APPLICABLE SIMILAR LAWS.

THIS SECURITY DOES NOT REPRESENT AN OBLIGATION OF OR INTEREST IN AMERICAN TOWER TRUST I, SPECTRASITE COMMUNICATIONS, LLC, MIDLAND LOAN SERVICES, A DIVISION OF PNC BANK, NATIONAL ASSOCIATION, U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, BARCLAYS CAPITAL INC. OR ANY OF THEIR RESPECTIVE AFFILIATES. EXCEPT FOR THE GUARANTY OF THE REPAYMENT OF THE MORTGAGE LOAN PROVIDED BY AMERICAN TOWER HOLDING SUB, LLC (WHOSE ONLY MATERIAL ASSET IS THE EQUITY INTEREST IN AMERICAN TOWER ASSET SUB, LLC AND AMERICAN TOWER ASSET SUB II, LLC),

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AND BY AMERICAN TOWER GUARANTOR SUB, LLC (WHOSE ONLY MATERIAL ASSET IS THE EQUITY INTEREST IN AMERICAN TOWER HOLDING SUB, LLC), NEITHER THE SECURITIES NOR THE MORTGAGE LOAN IS INSURED OR GUARANTEED BY ANY GOVERNMENTAL AGENCY OR INSTRUMENTALITY OF THE UNITED STATES OR BY ANY OTHER PERSON.

THE OUTSTANDING SECURITY PRINCIPAL BALANCE HEREOF AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ABOVE.

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This certifies that SPECTRASITE COMMUNICATIONS, LLC is the registered owner of the Subclass Percentage Interest evidenced by this Security (obtained by dividing the principal amount of this Security (its “Security Principal Balance”) as of the Closing Date by the Subclass Principal Balance of the Subclass of Securities to which this Security belongs) in that certain beneficial ownership interest in the Trust Fund evidenced by all the Subclass 2023-1R Securities. The Trust Fund was created pursuant to a Trust and Servicing Agreement, dated as of May 4, 2007, among American Tower Depositor Sub, LLC, as depositor (the “Depositor”), Midland Loan Services, a Division of PNC Bank, National Association (as successor to The Bank of New York Mellon), as servicer (in such capacity, the “Servicer”) and U.S. Bank Trust Company, National Association, successor in interest to U.S. Bank National Association, successor in interest to Bank Of America, National Association, successor by merger to LaSalle Bank National Association, as trustee (the “Trustee”), as amended and restated by the First Amended and Restated Trust and Servicing Agreement, dated as of March 15, 2013, among the Depositor, the Servicer and the Trustee, as further amended and restated by the Second Amended and Restated Trust and Servicing Agreement, dated as of March 29, 2018 (the “Trust Agreement”), among the Depositor, the Servicer and the Trustee, as supplemented by the First Trust Agreement Supplement, dated as of March 29, 2018 among the Depositor, the Servicer and the Trustee, and by the Second Trust Agreement Supplement, dated as of March 13, 2023 (the Trust Agreement, as so amended and restated and so supplemented, the “Agreement”). To the extent not defined herein, capitalized terms used herein have the respective meanings assigned thereto in the Agreement. This Security is issued under and is subject to the terms, provisions and conditions of the Agreement, to which Agreement the Holder of this Security by virtue of its acceptance hereof assents and by which such Holder is bound.

Pursuant to the terms of the Agreement, beginning on the first Distribution Date specified above, distributions will be made on the 15th day of each month or, if any such 15th day is not a Business Day, on the next succeeding Business Day (each, a “Distribution Date”) to the Person in whose name this Security is registered at the close of business on the last Business Day of the calendar month immediately preceding the month in which such Distribution Date occurs (the “Record Date”), in an amount equal to the product of the Subclass Percentage Interest evidenced by this Security and the amount required to be distributed to all the Holders of the Subclass of Securities to which this Security belongs on the applicable Distribution Date pursuant to the Agreement. All distributions made under the Agreement on this Security will be made by the Trustee by wire transfer of immediately available funds to the account of the Person entitled thereto at a bank or other entity having appropriate facilities therefor, if this Securityholder shall have provided the Trustee with wiring instructions no later than five Business Days prior to the related Record Date (which wiring instructions may be in the form of a standing order applicable to all subsequent distributions), or otherwise by check mailed to the address of this Securityholder as it appears in the Certificate Register. Notwithstanding the foregoing, the final distribution on this Security will be made in like manner, but only upon presentation and surrender of this Security at the offices of the Certificate Registrar or such other location specified in the notice to the Holder hereof of such final distribution.

This Security shall accrue interest during each Interest Accrual Period on the Security Principal Balance of such Security at a rate per annum equal to the related Pass-Through Rate. Interest on each Subclass of Securities shall be calculated on a 30/360 Basis and, during each Interest Accrual Period, shall accrue at the Pass-Through Rate for such Subclass for such Interest

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Accrual Period on the Subclass Principal Balance thereof outstanding immediately prior to the related Distribution Date.

The Securities are limited in right of distribution to certain collections and recoveries respecting the Mortgage Loan, all as more specifically set forth herein and in the Agreement. As provided in the Agreement, withdrawals from the Distribution Account, the Collection Account, the Lock Box Account and, if established, the REO Account may be made from time to time for purposes other than, and, in certain cases, prior to, distributions to Securityholders, such purposes including the reimbursement of advances made, or certain expenses occurred, with respect to the Mortgage Loan and the payment of interest on such advances and expenses.

Any distribution to the Holder of this Security in reduction of the Security Principal Balance hereof is binding on such Holder and all future Holders of this Security and any Security issued upon the transfer hereof or in exchange therefor or in lieu hereof whether or not notation of such distribution is made upon this Security.

This Security is issuable in fully registered form only without coupons. As provided in the Agreement and subject to certain limitations therein set forth, this Security is exchangeable for new Securities of the same Subclass in authorized denominations evidencing the same aggregate Subclass Percentage Interest, as requested by the Holder surrendering the same.

No transfer, sale, pledge or other disposition of any Security or interest therein shall be made unless that transfer, sale, pledge or other disposition is exempt from the registration and/or qualification requirements of the Securities Act and any applicable state securities laws, or is otherwise made in accordance with the Securities Act and such state securities laws.

If a transfer of any Security that constitutes a Definitive security is to be made without registration under the Securities Act (other than in connection with the initial issuance of the Securities or a transfer of any Security by the Depositor or an Affiliate of the Depositor or a transfer of a Book-Entry Security to a successor Depository as contemplated by Section 5.03(c) of the Agreement), then the Certificate Registrar shall refuse to register such transfer unless it receives (and, upon receipt, may conclusively rely upon) either: (i) a certificate from the Securityholder desiring to effect such transfer substantially in the form attached as Exhibit E-5 or Exhibit E-6 to the Agreement; or (ii) an Opinion of Counsel satisfactory to the Trustee to the effect that such transfer may be made without registration under the Securities Act (which Opinion of Counsel shall not be an expense of the Trust or of the Depositor, the Servicer, the Trustee or the Certificate Registrar in their respective capacities as such), together with the written certification(s) as to the facts surrounding such transfer from the Securityholder desiring to effect such transfer and/or such Securityholder’s prospective Transferee on which such Opinion of Counsel is based.

None of the Depositor, the Trustee or the Certificate Registrar shall be obligated to register or qualify any Subclass of Securities under the Securities Act or any other securities law or to take any action not otherwise required under the Agreement to permit the transfer of any Security or interest therein without registration or qualification.

-6-

With regard to a Security, no transfer of any such Security or interest therein shall be made to any retirement plan or other employee benefit plan, account or arrangement, subject to Title I of ERISA or Section 4975 of the Code or any similar provision of any other federal, state, local or non-U.S. law or regulation (each, a “Plan”), or a Person who is directly or indirectly purchasing or holding such Security or such interest therein on behalf of, as a fiduciary of, as trustee of, or with the assets of any Plan, unless such Plan or Person is deemed or required, as applicable, to represent that its purchasing or holding of such Security or interest therein will not constitute a non-exempt prohibited transaction under Section 406 of ERISA or Section 4975 of the Code or pursuant to one or more prohibited transaction statutory or administrative exemptions and will not violate any applicable provision of any federal, state, local or non-U.S. law or regulation which contains one or more provisions that are similar to such sections of ERISA or the Code (collectively, the “Similar Laws”) and (ii) with respect to each Plan that is subject to Title I of ERISA or Section 4975 of the Code (each, a “Covered Plan”), a fiduciary acting on behalf of the Covered Plan is causing it to acquire the Security or an interest therein and such fiduciary (A) is a bank, an insurance carrier, a registered investment adviser, a registered broker-dealer or an independent fiduciary with at least $50 million of assets under management or control, each as specified in the U.S. Code of Federal Regulations, 29 CFR section 2510.3-21(c)(1)(referred to herein as the “Fiduciary Rule”) (excluding, if the Covered Plan is an account of annuity described in Section 4975(E)(1)(B) through (F) of the Code, such as an individual retirement account (“IRA”) or a health savings account (“HSA”), the owner of such account or annuity or a relative of such owner); (B) is independent (for purposes of such Fiduciary Rule) of the Borrower, Parent Guarantor, Trust, Trustee, Servicer, Initial Purchasers, and their respective affiliates (the “Transaction Parties”); (C) is capable of evaluating investment risks independently, both in general and with regard to particular transactions and investment strategies, including the Covered Plan’s transactions with the Transaction Parties in connection with the Security; (D) has been advised that none of the Transaction Parties have undertaken or will undertake to provide impartial investment advice, or has given or will give advice in a fiduciary capacity, in connection with the Covered Plan’s transactions with the transaction parties; (E) is a “fiduciary” under Section 3(21)(a) of ERISA or Section 4975(e)(3) of the Code, or both, as applicable, with respect to, and is responsible for exercising independent judgment in evaluating, the Covered Plan’s transactions with the Transaction Parties; and (F) (x) understands and acknowledges the existence and nature of the financial interests of the Transaction Parties in connection with the transactions contemplated in connection with the Security and (y) understands, acknowledges and agrees that no such fee or other compensation is a fee or other compensation for the provision of investment advice, and that none of the Transaction Parties has received or will receive a fee or other compensation from the Covered Plan or such fiduciary for the provision of investment advice (rather than other services) in connection with the Covered Plan’s transactions with the Transaction Parties in connection with the Security. Each Transferee of a Definitive security will be required to represent and warrant that either (i) it is not a Plan or any Person who is directly or indirectly purchasing or holding such Security on behalf of, as a fiduciary of, or with the assets of any Plan or (ii) its purchase and holding of such Security or any interest therein will not constitute a non-exempt prohibited transaction under Section 406 of ERISA and Section 4975 of the Code pursuant to one or more prohibited transaction statutory or administrative exemptions and will not violate any applicable provision of any Similar Laws and (ii) with respect to each Covered Plan, a fiduciary acting on behalf of the Covered Plan is causing it to acquire the Security or an interest therein and such fiduciary (A) is a bank, an insurance carrier, a registered investment adviser, a

-7-

registered broker-dealer or an independent fiduciary with at least $50 million of assets under management or control, each as specified in the Fiduciary Rule (excluding, if the Covered Plan is an account of annuity described in Section 4975(E)(1)(B) through (F) of the Code, such as an IRA or a HSA, the owner of such account or annuity or a relative of such owner); (B) is independent (for purposes of such Fiduciary Rule) of the Transaction Parties; (C) is capable of evaluating investment risks independently, both in general and with regard to particular transactions and investment strategies, including the Covered Plan’s transactions with the Transaction Parties in connection with the Security; (D) has been advised that none of the Transaction Parties have undertaken or will undertake to provide impartial investment advice, or has given or will give advice in a fiduciary capacity, in connection with the Covered Plan’s transactions with the transaction parties; (E) is a “fiduciary” under Section 3(21)(a) of ERISA or Section 4975(e)(3) of the Code, or both, as applicable, with respect to, and is responsible for exercising independent judgment in evaluating, the Covered Plan’s transactions with the Transaction Parties; and (F) (x) understands and acknowledges the existence and nature of the financial interests of the Transaction Parties in connection with the transactions contemplated in connection with the Security and (y) understands, acknowledges and agrees that no such fee or other compensation is a fee or other compensation for the provision of investment advice, and that none of the Transaction Parties has received or will receive a fee or other compensation from the Covered Plan or such fiduciary for the provision of investment advice (rather than other services) in connection with the Covered Plan’s transactions with the Transaction Parties in connection with the Security. Any Transferee of a Definitive security that does not provide the required representation and warranty will be deemed to have made one of the representations in the preceding sentence. No transfer of any Security shall be made to any Plan or to any person who is directly or indirectly acquiring such Security on behalf of, as fiduciary of, as trustee of, or with the assets of, a Plan, except in each such case, in accordance with the provisions of this Subsection (c). Any attempted or purported transfer of a Security in violation of this Subsection (c) will be null and void and vest no rights in any purported Transferee.

No service charge will be imposed for any transfer or exchange of this Security, but the Trustee or the Certificate Registrar may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any transfer or exchange of this Security.

The Agreement may be amended from time to time by the mutual agreement of the parties thereto, with the consent of the Holders of Securities entitled to not less than 51% of the Voting Rights allocated to each of the affected Classes, for the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of the Agreement or of modifying in any manner the rights of the Holders of Securities; provided, however, that no such amendment shall (i) reduce in any manner the amount of, or delay the timing of, payments received or advanced on the Mortgage Loan and/or any REO Properties which are required to be distributed on any Security, without the consent of the Holder of such Security, (ii) adversely affect in any material respect the interests of the Holders of any Class of Securities in a manner other than as described in clause (i) above, without the consent of the Holders of all Securities of such Class, or (iii) modify (A) the provisions of Section 11.01 of the Agreement, (B) any percentage of the Voting Rights specified in any other Section of the Agreement or (C) the definition of “Servicing Standard”, without the consent of the Holders of all Securities then outstanding. Notwithstanding any other provision of the Agreement, for purposes of the giving or withholding of consents

-8-

pursuant to Section 11.01 of the Agreement, Securities registered in the name of the Depositor or any Affiliate of the Depositor shall be entitled to the same Voting Rights with respect to the matters described above as they would if registered in the name of any other Person. The Trustee shall not consent to any amendment to the Agreement unless it shall first have obtained or been furnished with an Opinion of Counsel (at the expense of the party requesting the amendment, or, if such amendment is requested by the Trustee with the consent of the Depositor (which consent shall not be unreasonably withheld), at the expense of the Trust Fund) to the effect that neither such amendment nor the exercise of any power granted to any party thereto in accordance with such amendment will result in an Adverse Tax Status Event. In addition, prior to the execution of any amendment to the Agreement, the Trustee and the Servicer shall be entitled to receive and rely upon an Opinion of Counsel stating that the execution of such amendment is authorized or permitted by the Agreement. The Agreement also permits the amendment thereof, in certain limited circumstances, without the consent of the holders of any of the Securities.

Unless the certificate of authentication hereon has been executed by the Certificate Registrar, by manual signature, this Security shall not be entitled to any benefit under the Agreement or be valid for any purpose.

The registered Holder hereof, by its acceptance hereof, agrees that it will look solely to the Trust Fund (to the extent of its rights therein) for distributions hereunder.

This Security shall be construed in accordance with the substantive laws of the State of New York applicable to agreements made and to be performed entirely in said State, and the obligations, rights and remedies of the Holder hereof shall be determined in accordance with such laws.

-9-

IN WITNESS WHEREOF, the Trustee has duly executed this Security in its capacity as the Trustee.

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, not in its individual capacity but solely as Trustee
By:
	Authorized Officer

CERTIFICATE OF AUTHENTICATION

This is one of the Subclass 2023-1R Securities referred to in the within-mentioned Agreement.

Dated:                         , 2023

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, not in its individual capacity but solely as Certificate Registrar
By:
	Authorized Officer

Signature Page for Specimen Definitive Certificate, 2023-1R

ASSIGNMENT

FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s) unto

(please print or typewrite name and address including postal zip code and assignee)

the beneficial ownership interest in the Trust Fund evidenced by the within Secured Tower Revenue Security and hereby authorizes(s) the registration of transfer of such interest to assignee on the Certificate Register of the Trust Fund.

I (we) further direct the Certificate Registrar to issue a new Secured Tower Revenue Security of a like Subclass Percentage Interest and Subclass to the above named assignee and deliver such Secured Tower Revenue Security to the following address:

Dated: [                    ]

Signature by or on behalf of Assignor

Signature Guaranteed

DISTRIBUTION INSTRUCTIONS

The Assignee should include the following for purposes of distribution:

Distributions shall, if permitted, be made by wire transfer or otherwise, in immediately available funds, to                                      for the account of                                              .

Distributions made by check (such check to be made payable to                                     ) and all applicable statements and notices should be mailed to                                          .

This information is provided by                                  the Assignee named above, or                                          , as its agent.

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, Thomas A. Bartlett, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of American Tower Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: April 26, 2023	By:	/S/    THOMAS A. BARTLETT
		Thomas A. Bartlett
		President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Rodney M. Smith, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q of American Tower Corporation;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: April 26, 2023	By:	/S/    RODNEY M.SMITH
		Rodney M. Smith
		Executive Vice President, Chief Financial Officer and Treasurer

EX-32

Exhibit 32

CERTIFICATIONS PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Quarterly Report on Form 10-Q of American Tower Corporation (the “Company”) for the three months ended March 31, 2023, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned officers of the Company hereby certifies, pursuant to 18 U.S.C. Section 1350, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: April 26, 2023	By:	/S/   THOMAS A. BARTLETT
		Thomas A. Bartlett
		President and Chief Executive Officer
Date: April 26, 2023	By:	/S/    RODNEY M. SMITH
		Rodney M. Smith
		Executive Vice President, Chief Financial Officer and Treasurer

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Cover Page - shares	3 Months Ended
	Mar. 31, 2023	Apr. 19, 2023
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	001-14195
Entity Registrant Name	AMERICAN TOWER CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	65-0723837
Entity Address, Address Line One	116 Huntington Avenue
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02116
City Area Code	617
Local Phone Number	375-7500
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		466,043,234
Entity Central Index Key	0001053507
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false
Common Stock, $0.01 par value
Document Information [Line Items]
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	AMT
Security Exchange Name	NYSE
1.375% Senior Notes due 2025
Document Information [Line Items]
Title of 12(b) Security	1.375% Senior Notes due 2025
Trading Symbol	AMT 25A
Security Exchange Name	NYSE
1.950% Senior Notes due 2026
Document Information [Line Items]
Title of 12(b) Security	1.950% Senior Notes due 2026
Trading Symbol	AMT 26B
Security Exchange Name	NYSE
0.450% Senior Notes due 2027
Document Information [Line Items]
Title of 12(b) Security	0.450% Senior Notes due 2027
Trading Symbol	AMT 27C
Security Exchange Name	NYSE
0.400% Senior Notes due 2027
Document Information [Line Items]
Title of 12(b) Security	0.400% Senior Notes due 2027
Trading Symbol	AMT 27D
Security Exchange Name	NYSE
0.500% Senior Notes due 2028
Document Information [Line Items]
Title of 12(b) Security	0.500% Senior Notes due 2028
Trading Symbol	AMT 28A
Security Exchange Name	NYSE
0.875% Senior Notes due 2029
Document Information [Line Items]
Title of 12(b) Security	0.875% Senior Notes due 2029
Trading Symbol	AMT 29B
Security Exchange Name	NYSE
0.950% Senior Notes due 2030
Document Information [Line Items]
Title of 12(b) Security	0.950% Senior Notes due 2030
Trading Symbol	AMT 30C
Security Exchange Name	NYSE
1.000% Senior Notes due 2032
Document Information [Line Items]
Title of 12(b) Security	1.000% Senior Notes due 2032
Trading Symbol	AMT 32
Security Exchange Name	NYSE
1.250% Senior Notes due 2033
Document Information [Line Items]
Title of 12(b) Security	1.250% Senior Notes due 2033
Trading Symbol	AMT 33
Security Exchange Name	NYSE

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
CURRENT ASSETS:
Cash and cash equivalents	$ 1,803.0	$ 2,028.4
Restricted cash	122.4	112.3
Accounts receivable, net	705.4	758.3
Prepaid and other current assets	819.3	723.3
Total current assets	3,450.1	3,622.3
PROPERTY AND EQUIPMENT, net	19,843.3	19,998.3
GOODWILL	12,997.2	12,956.7
OTHER INTANGIBLE ASSETS, net	17,637.1	17,983.3
DEFERRED TAX ASSET	107.4	129.2
DEFERRED RENT ASSET	3,160.3	3,039.1
RIGHT-OF-USE ASSET	8,952.4	8,918.9
NOTES RECEIVABLE AND OTHER NON-CURRENT ASSETS	669.9	546.7
TOTAL	66,817.7	67,194.5
CURRENT LIABILITIES:
Accounts payable	206.0	218.6
Accrued expenses	1,171.6	1,344.2
Distributions payable	745.3	745.3
Accrued interest	208.5	261.0
Current portion of operating lease liability	790.1	788.9
Current portion of long-term obligations	3,856.4	4,514.2
Unearned revenue	554.2	439.7
Total current liabilities	7,532.1	8,311.9
LONG-TERM OBLIGATIONS	34,685.6	34,156.0
OPERATING LEASE LIABILITY	7,576.9	7,591.9
ASSET RETIREMENT OBLIGATIONS	2,093.5	2,047.4
DEFERRED TAX LIABILITY	1,505.6	1,492.0
OTHER NON-CURRENT LIABILITIES	1,173.7	1,186.8
Total liabilities	54,567.4	54,786.0
COMMITMENTS AND CONTINGENCIES
EQUITY (shares in thousands):
Common stock: $.01 par value; 1,000,000 shares authorized; 477,042 and 476,623 shares issued; and 466,038 and 465,619 shares outstanding, respectively	4.8	4.8
Additional paid-in capital	14,725.6	14,689.0
Distributions in excess of earnings	(2,496.5)	(2,101.9)
Accumulated other comprehensive loss	(5,526.1)	(5,718.3)
Treasury stock (11,004 shares at cost)	(1,301.2)	(1,301.2)
Total American Tower Corporation equity	5,406.6	5,572.4
Noncontrolling interests	6,843.7	6,836.1
Total equity	12,250.3	12,408.5
TOTAL	$ 66,817.7	$ 67,194.5

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	477,042,000	476,623,000
Common stock, shares outstanding (in shares)	466,038,000	465,619,000
Treasury stock, shares (in shares)	11,004,000	11,004,000

XML

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
REVENUES:
Total operating revenues	$ 2,767.2	$ 2,660.3
Costs of operations (exclusive of items shown separately below):
Property	787.0	771.5
Depreciation, amortization and accretion	794.1	815.8
Selling, general, administrative and development expense	263.9	293.9
Other operating expenses	127.5	26.1
Total operating expenses	1,991.6	1,935.2
OPERATING INCOME	775.6	725.1
OTHER INCOME (EXPENSE):
Interest income	30.8	9.9
Interest expense	(340.2)	(262.4)
Other (expense) income (including foreign currency (losses) gains of $(84.1) and $242.1, respectively)	(97.8)	252.6
Total other (expense) income	(407.2)	0.1
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	368.4	725.2
Income tax provision	(53.4)	(22.5)
NET INCOME	315.0	702.7
Net loss attributable to noncontrolling interests	20.8	9.0
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS, BASIC	335.8	711.7
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS, DILUTED	$ 335.8	$ 711.7
NET INCOME PER COMMON SHARE AMOUNTS:
Basic net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 0.72	$ 1.56
Diluted net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 0.72	$ 1.56
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (in thousands):
BASIC (in shares)	465,741	455,946
DILUTED (in shares)	466,810	457,211
Property
REVENUES:
Total operating revenues	$ 2,714.5	$ 2,600.8
Services
REVENUES:
Total operating revenues	52.7	59.5
Costs of operations (exclusive of items shown separately below):
Services	$ 19.1	$ 27.9

XML

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Foreign currency gains (losses)	$ (84.1)	$ 242.1

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 315.0	$ 702.7
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax (benefit) expense of $(0.0) and $0.0, respectively	232.1	94.4
Other comprehensive income	232.1	94.4
Comprehensive income	547.1	797.1
Comprehensive (income) loss attributable to noncontrolling interests	(19.1)	100.5
Comprehensive income attributable to American Tower Corporation stockholders	$ 528.0	$ 897.6

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax (benefit) expense	$ (0.0)	$ 0.0

XML

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 315.0	$ 702.7
Adjustments to reconcile net income to cash provided by operating activities
Depreciation, amortization and accretion	794.1	815.8
Stock-based compensation expense	65.5	56.7
Other non-cash items reflected in statements of operations	235.3	(232.8)
Increase in net deferred rent balances	(112.0)	(109.3)
Right-of-use asset and Operating lease liability, net	(44.9)	(26.6)
Changes in unearned revenue	96.2	(201.4)
Increase in assets	(170.1)	(171.5)
Decrease in liabilities	(108.6)	(170.0)
Cash provided by operating activities	1,070.5	663.6
CASH FLOWS FROM INVESTING ACTIVITIES
Payments for purchase of property and equipment and construction activities	(461.9)	(386.1)
Payments for acquisitions, net of cash acquired	(60.9)	(128.6)
Proceeds from sale of short-term investments and other non-current assets	3.1	3.2
Deposits and other	242.9	(1.6)
Cash used for investing activities	(276.8)	(513.1)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from short-term borrowings, net	154.1	0.0
Borrowings under credit facilities	1,745.0	2,250.0
Proceeds from issuance of senior notes, net	1,494.2	0.0
Proceeds from issuance of securities in securitization transaction	1,300.0	0.0
Repayments of notes payable, credit facilities, senior notes, secured debt, term loans and finance leases	(4,897.9)	(1,817.1)
Distributions to noncontrolling interest holders	(11.2)	(0.1)
Proceeds from stock options	1.8	8.0
Distributions paid on common stock	(733.6)	(641.2)
Deferred financing costs and other financing activities	(65.0)	(50.5)
Cash used for financing activities	(1,012.6)	(250.9)
Net effect of changes in foreign currency exchange rates on cash and cash equivalents, and restricted cash	3.6	28.5
NET DECREASE IN CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH	(215.3)	(71.9)
CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH, BEGINNING OF PERIOD	2,140.7	2,343.3
CASH AND CASH EQUIVALENTS, AND RESTRICTED CASH, END OF PERIOD	1,925.4	2,271.4
CASH PAID FOR INCOME TAXES (NET OF REFUNDS OF $8.4 AND $0.3, RESPECTIVELY)	62.3	99.8
CASH PAID FOR INTEREST	388.9	304.0
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Purchases of property and equipment under finance leases and perpetual easements	7.3	1.8
Decrease in accounts payable and accrued expenses for purchases of property and equipment and construction activities	$ (71.7)	$ (46.9)

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Cash Flows [Abstract]
Income tax refunds	$ 8.4	$ 0.3

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CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Distributions in Excess of Earnings	Noncontrolling Interests
Balance at beginning of period, common stock (shares) at Dec. 31, 2021		466,687
Balance at beginning of period at Dec. 31, 2021	$ 9,069.6	$ 4.7	$ (1,282.4)	$ 12,240.2	$ (4,738.9)	$ (1,142.4)	$ 3,988.4
Balance at beginning of period, treasury stock (shares) at Dec. 31, 2021			(10,915)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (shares)		505
Stock-based compensation related activity	25.9	$ 0.0		25.9
Foreign currency translation adjustment, net of tax	94.4				185.9		(91.5)
Distributions to noncontrolling interest holders	(0.2)						(0.2)
Common stock distributions declared	(641.7)					(641.7)
Net income (loss)	702.7					711.7	(9.0)
Balance at end of period, common stock (shares) at Mar. 31, 2022		467,192
Balance at end of period at Mar. 31, 2022	$ 9,250.7	$ 4.7	$ (1,282.4)	12,266.1	(4,553.0)	(1,072.4)	3,887.7
Balance at end of period, treasury stock (shares) at Mar. 31, 2022			(10,915)
Balance at beginning of period, common stock (shares) at Dec. 31, 2022	465,619	476,623
Balance at beginning of period at Dec. 31, 2022	$ 12,408.5	$ 4.8	$ (1,301.2)	14,689.0	(5,718.3)	(2,101.9)	6,836.1
Balance at beginning of period, treasury stock (shares) at Dec. 31, 2022	(11,004)		(11,004)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity (shares)		419
Stock-based compensation related activity	$ 36.6	$ 0.0		36.6
Foreign currency translation adjustment, net of tax	232.1				192.2		39.9
Distributions to noncontrolling interest holders	(11.5)						(11.5)
Common stock distributions declared	(730.4)					(730.4)
Net income (loss)	$ 315.0					335.8	(20.8)
Balance at end of period, common stock (shares) at Mar. 31, 2023	466,038	477,042
Balance at end of period at Mar. 31, 2023	$ 12,250.3	$ 4.8	$ (1,301.2)	$ 14,725.6	$ (5,526.1)	$ (2,496.5)	$ 6,843.7
Balance at end of period, treasury stock (shares) at Mar. 31, 2023	(11,004)		(11,004)

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

3 Months Ended

Mar. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

The accompanying consolidated and condensed consolidated financial statements have been prepared by American Tower Corporation (together with its subsidiaries, “ATC” or the “Company”) pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). The financial information included herein is unaudited. However, the Company believes that all adjustments, which are of a normal and recurring nature, considered necessary for a fair presentation of its financial position and results of operations for such periods have been included herein. The consolidated and condensed consolidated financial statements and related notes should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2022 (the “2022 Form 10-K”). The results of operations for the three months ended March 31, 2023 are not necessarily indicative of the results that may be expected for the entire year.

Principles of Consolidation and Basis of Presentation—The accompanying consolidated and condensed consolidated financial statements include the accounts of the Company and those entities in which it has a controlling interest. Investments in entities that the Company does not control are accounted for using the equity method or as investments in equity securities, depending upon the Company’s ability to exercise significant influence over operating and financial policies. All intercompany accounts and transactions have been eliminated.

As of March 31, 2023, the Company holds (i) a 52% controlling interest in subsidiaries whose holdings consist of the Company’s operations in France, Germany, Poland and Spain (such subsidiaries, collectively, “ATC Europe”) (Allianz and CDPQ (each as defined in note 11) hold the noncontrolling interests), (ii) a 51% controlling interest in a joint venture whose holdings consist of the Company’s operations in Bangladesh (Confidence Tower Holdings Ltd. (“Confidence Group”) holds the noncontrolling interests) and (iii) a common equity interest of approximately 72% in the Company’s U.S. data center business (Stonepeak (as defined and further discussed in note 11) holds approximately 28% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity). As of March 31, 2023, ATC Europe holds an 87% and an 83% controlling interest in subsidiaries that consist of the Company’s operations in Germany and Spain, respectively (PGGM holds the noncontrolling interests). See note 11 for a discussion of changes to the Company’s noncontrolling interests during the three months ended March 31, 2023 and 2022.

Sale of Mexico Fiber— On March 29, 2023, the Company completed the sale of one of its subsidiaries in Mexico that held fiber assets (“Mexico Fiber”) for total consideration of $252.5 million, resulting in a loss on the sale of $80.0 million, which was included in Other operating expenses in the accompanying consolidated statements of operations. As a result of the transaction, the Company disposed of $20.7 million of goodwill based on the relative fair value of Mexico Fiber and the portion of the applicable goodwill reporting unit that was expected to be retained. Prior to the divestiture, Mexico Fiber’s operating results were included within the Latin America property segment. The divestiture did not qualify for presentation as a discontinued operation.

Reportable Segments—The Company reports its results in seven segments – U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property, Data Centers and Services, which are discussed further in note 15.

Significant Accounting Policies—The Company’s significant accounting policies are described in note 1 to the Company’s consolidated financial statements included in the 2022 Form 10-K. There have been no material changes to the Company’s significant accounting policies during the three months ended March 31, 2023.

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

	Three Months Ended March 31,
	2023		2022
Cash and cash equivalents	$	1,803.0	$	1,941.5
Restricted cash	122.4		329.9
Total cash, cash equivalents and restricted cash	$	1,925.4	$	2,271.4

Restricted cash as of March 31, 2022 includes advance payments from a customer received during the year ended December 31, 2021.

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

Non-lease property revenue—Non-lease property revenue consists primarily of revenue generated from DAS networks, fiber and other property related revenue. DAS networks and fiber arrangements generally require that the Company provide the tenant the right to use available capacity on the applicable communications infrastructure. Performance obligations are satisfied over time for the duration of the arrangements. Non-lease property revenue also includes revenue generated from interconnection offerings in the Company’s data center facilities. Interconnection offerings are generally contracted on a month-to-month basis and are cancellable by the Company or the data center customer at any time. Performance obligations are satisfied over time for the duration of the arrangements. Other property related revenue streams, which include site inspections, are not material on either an individual or consolidated basis. There were no material changes in the receivables, contract assets and contract liabilities from contracts with customers for the three months ended March 31, 2023.

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

A summary of revenue disaggregated by source and geography is as follows:

Three Months Ended March 31, 2023	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	71.0	$	2.3	$	6.7	$	3.4	$	41.3	$	28.3	$	153.0
Services revenue	52.7		—		—		—		—		—		52.7
Total non-lease revenue	$	123.7	$	2.3	$	6.7	$	3.4	$	41.3	$	28.3	$	205.7
Property lease revenue	1,216.6		248.8		310.3		188.3		422.8		174.7		2,561.5
Total revenue	$	1,340.3	$	251.1	$	317.0	$	191.7	$	464.1	$	203.0	$	2,767.2

Three Months Ended March 31, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	74.2	$	3.0	$	7.1	$	2.4	$	37.3	$	25.8	$	149.8
Services revenue	59.5		—		—		—		—		—		59.5
Total non-lease revenue	$	133.7	$	3.0	$	7.1	$	2.4	$	37.3	$	25.8	$	209.3
Property lease revenue	1,158.2		295.5		260.7		196.1		382.0		158.5		2,451.0
Total revenue	$	1,291.9	$	298.5	$	267.8	$	198.5	$	419.3	$	184.3	$	2,660.3

Property revenue for the three months ended March 31, 2023 and 2022 includes straight-line revenue of $112.0 million and $109.4 million, respectively.

The Company actively monitors the creditworthiness of its customers. In recognizing customer revenue, the Company assesses the collectibility of both the amounts billed and the portion recognized in advance of billing on a straight-line basis. This assessment takes customer credit risk and business and industry conditions into consideration to ultimately determine the collectibility of the amounts billed. To the extent the amounts, based on management’s estimates, may not be collectible, revenue recognition is deferred until such point as collectibility is determined to be reasonably assured.

During the three months ended March 31, 2023, the Company deferred recognition of revenue of approximately $33.0 million related to a customer in India.

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PREPAID AND OTHER CURRENT ASSETS

3 Months Ended

Mar. 31, 2023

Prepaid Expense and Other Assets, Current [Abstract]

PREPAID AND OTHER CURRENT ASSETS

PREPAID AND OTHER CURRENT ASSETS

Prepaid and other current assets consisted of the following:

	As of
	March 31, 2023		December 31, 2022
Prepaid assets	$	95.3	$	100.7
Prepaid income tax	153.0		139.3
Unbilled receivables	308.5		283.8
Value added tax and other consumption tax receivables	58.2		83.6
Other miscellaneous current assets (1)	204.3		115.9
Prepaid and other current assets	$	819.3	$	723.3

_______________

(1)Includes short-term portion of the VIL OCDs (as defined and further discussed in note 7).

XML

LEASES

3 Months Ended

Mar. 31, 2023

Leases [Abstract]

LEASES

LEASES

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

During the three months ended March 31, 2023, the Company made no changes to the methods described in note 4 to its consolidated financial statements included in the 2022 Form 10-K. As of March 31, 2023, the Company does not have any material related party leases as either a lessor or a lessee. To the extent there are any intercompany leases, these are eliminated in consolidation.

Lessor— Historically, the Company has been able to successfully renew its applicable leases as needed to ensure continuation of its revenue. Accordingly, the Company assumes that it will have access to the communications infrastructure or ground space underlying its sites when calculating future minimum rental receipts through the end of the respective terms. Future minimum rental receipts expected under non-cancellable operating lease agreements as of March 31, 2023 were as follows:

Fiscal Year	Amount (1) (2)
Remainder of 2023	$	5,937.0
2024	7,616.7
2025	7,157.0
2026	6,667.0
2027	6,521.2
Thereafter	28,680.8
Total	$	62,579.7

_______________

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

(2)Balances represent contractual amounts owned with no adjustments made for expected collectibility.

Lessee—The Company assesses its right-of-use asset and other lease-related assets for impairment, as described in note 1 to the Company’s consolidated financial statements included in the 2022 Form 10-K. There were no material impairments recorded related to these assets during the three months ended March 31, 2023 and 2022.

The Company leases certain land, buildings, equipment and office space under operating leases and land and improvements, towers, equipment and vehicles under finance leases. As of March 31, 2023, operating lease assets were included in Right-of-use asset and finance lease assets were included in Property and equipment, net in the consolidated balance sheet. During the three months ended March 31, 2023, other than leases acquired in connection with acquisitions, there were no material changes in the terms and provisions of the Company’s operating leases in which the

Company is a lessee. There were no material changes in finance lease assets and liabilities during the three months ended March 31, 2023.

Information about other lease-related balances is as follows:

	As of
	March 31, 2023		December 31, 2022
Operating leases:
Right-of-use asset	$	8,952.4	$	8,918.9
Current portion of lease liability	$	790.1	$	788.9
Lease liability	7,576.9		7,591.9
Total operating lease liability	$	8,367.0	$	8,380.8

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

	As of
	March 31, 2023		December 31, 2022
Operating leases:
Weighted-average remaining lease term (years)	12.1		12.2
Weighted-average incremental borrowing rate	5.5	%	5.3	%

The following table sets forth the components of lease cost:

	Three Months Ended March 31,
	2023		2022
Operating lease cost	$	306.7	$	306.5
Variable lease costs not included in lease liability (1)	109.1		101.4

______________

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

Supplemental cash flow information is as follows:

	Three Months Ended March 31,
	2023		2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(342.6)	$	(336.3)
Non-cash items:
New operating leases (1)	$	56.5	$	58.6
Operating lease modifications and reassessments (2)	$	102.9	$	(11.2)

______________

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

(2)For the three months ended March 31, 2022, includes a reduction of the operating lease liability due to purchase accounting measurement period adjustments.

As of March 31, 2023, the Company does not have material operating or financing leases that have not yet commenced.

Maturities of operating lease liabilities as of March 31, 2023 were as follows:

Fiscal Year	Operating Lease (1)
Remainder of 2023	$	892.1
2024	1,096.6
2025	1,036.4
2026	976.4
2027	912.6
Thereafter	6,515.1
Total lease payments	11,429.2
Less amounts representing interest	(3,062.2)
Total lease liability	8,367.0
Less current portion of lease liability	790.1
Non-current lease liability	$	7,576.9

_______________

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

LEASES

LEASES

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

During the three months ended March 31, 2023, the Company made no changes to the methods described in note 4 to its consolidated financial statements included in the 2022 Form 10-K. As of March 31, 2023, the Company does not have any material related party leases as either a lessor or a lessee. To the extent there are any intercompany leases, these are eliminated in consolidation.

Lessor— Historically, the Company has been able to successfully renew its applicable leases as needed to ensure continuation of its revenue. Accordingly, the Company assumes that it will have access to the communications infrastructure or ground space underlying its sites when calculating future minimum rental receipts through the end of the respective terms. Future minimum rental receipts expected under non-cancellable operating lease agreements as of March 31, 2023 were as follows:

Fiscal Year	Amount (1) (2)
Remainder of 2023	$	5,937.0
2024	7,616.7
2025	7,157.0
2026	6,667.0
2027	6,521.2
Thereafter	28,680.8
Total	$	62,579.7

_______________

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

(2)Balances represent contractual amounts owned with no adjustments made for expected collectibility.

Lessee—The Company assesses its right-of-use asset and other lease-related assets for impairment, as described in note 1 to the Company’s consolidated financial statements included in the 2022 Form 10-K. There were no material impairments recorded related to these assets during the three months ended March 31, 2023 and 2022.

The Company leases certain land, buildings, equipment and office space under operating leases and land and improvements, towers, equipment and vehicles under finance leases. As of March 31, 2023, operating lease assets were included in Right-of-use asset and finance lease assets were included in Property and equipment, net in the consolidated balance sheet. During the three months ended March 31, 2023, other than leases acquired in connection with acquisitions, there were no material changes in the terms and provisions of the Company’s operating leases in which the

Company is a lessee. There were no material changes in finance lease assets and liabilities during the three months ended March 31, 2023.

Information about other lease-related balances is as follows:

	As of
	March 31, 2023		December 31, 2022
Operating leases:
Right-of-use asset	$	8,952.4	$	8,918.9
Current portion of lease liability	$	790.1	$	788.9
Lease liability	7,576.9		7,591.9
Total operating lease liability	$	8,367.0	$	8,380.8

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

	As of
	March 31, 2023		December 31, 2022
Operating leases:
Weighted-average remaining lease term (years)	12.1		12.2
Weighted-average incremental borrowing rate	5.5	%	5.3	%

The following table sets forth the components of lease cost:

	Three Months Ended March 31,
	2023		2022
Operating lease cost	$	306.7	$	306.5
Variable lease costs not included in lease liability (1)	109.1		101.4

______________

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

Supplemental cash flow information is as follows:

	Three Months Ended March 31,
	2023		2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(342.6)	$	(336.3)
Non-cash items:
New operating leases (1)	$	56.5	$	58.6
Operating lease modifications and reassessments (2)	$	102.9	$	(11.2)

______________

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

(2)For the three months ended March 31, 2022, includes a reduction of the operating lease liability due to purchase accounting measurement period adjustments.

As of March 31, 2023, the Company does not have material operating or financing leases that have not yet commenced.

Maturities of operating lease liabilities as of March 31, 2023 were as follows:

Fiscal Year	Operating Lease (1)
Remainder of 2023	$	892.1
2024	1,096.6
2025	1,036.4
2026	976.4
2027	912.6
Thereafter	6,515.1
Total lease payments	11,429.2
Less amounts representing interest	(3,062.2)
Total lease liability	8,367.0
Less current portion of lease liability	790.1
Non-current lease liability	$	7,576.9

_______________

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

LEASES

LEASES

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

During the three months ended March 31, 2023, the Company made no changes to the methods described in note 4 to its consolidated financial statements included in the 2022 Form 10-K. As of March 31, 2023, the Company does not have any material related party leases as either a lessor or a lessee. To the extent there are any intercompany leases, these are eliminated in consolidation.

Lessor— Historically, the Company has been able to successfully renew its applicable leases as needed to ensure continuation of its revenue. Accordingly, the Company assumes that it will have access to the communications infrastructure or ground space underlying its sites when calculating future minimum rental receipts through the end of the respective terms. Future minimum rental receipts expected under non-cancellable operating lease agreements as of March 31, 2023 were as follows:

Fiscal Year	Amount (1) (2)
Remainder of 2023	$	5,937.0
2024	7,616.7
2025	7,157.0
2026	6,667.0
2027	6,521.2
Thereafter	28,680.8
Total	$	62,579.7

_______________

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

(2)Balances represent contractual amounts owned with no adjustments made for expected collectibility.

Lessee—The Company assesses its right-of-use asset and other lease-related assets for impairment, as described in note 1 to the Company’s consolidated financial statements included in the 2022 Form 10-K. There were no material impairments recorded related to these assets during the three months ended March 31, 2023 and 2022.

The Company leases certain land, buildings, equipment and office space under operating leases and land and improvements, towers, equipment and vehicles under finance leases. As of March 31, 2023, operating lease assets were included in Right-of-use asset and finance lease assets were included in Property and equipment, net in the consolidated balance sheet. During the three months ended March 31, 2023, other than leases acquired in connection with acquisitions, there were no material changes in the terms and provisions of the Company’s operating leases in which the

Company is a lessee. There were no material changes in finance lease assets and liabilities during the three months ended March 31, 2023.

Information about other lease-related balances is as follows:

	As of
	March 31, 2023		December 31, 2022
Operating leases:
Right-of-use asset	$	8,952.4	$	8,918.9
Current portion of lease liability	$	790.1	$	788.9
Lease liability	7,576.9		7,591.9
Total operating lease liability	$	8,367.0	$	8,380.8

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

	As of
	March 31, 2023		December 31, 2022
Operating leases:
Weighted-average remaining lease term (years)	12.1		12.2
Weighted-average incremental borrowing rate	5.5	%	5.3	%

The following table sets forth the components of lease cost:

	Three Months Ended March 31,
	2023		2022
Operating lease cost	$	306.7	$	306.5
Variable lease costs not included in lease liability (1)	109.1		101.4

______________

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

Supplemental cash flow information is as follows:

	Three Months Ended March 31,
	2023		2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(342.6)	$	(336.3)
Non-cash items:
New operating leases (1)	$	56.5	$	58.6
Operating lease modifications and reassessments (2)	$	102.9	$	(11.2)

______________

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

(2)For the three months ended March 31, 2022, includes a reduction of the operating lease liability due to purchase accounting measurement period adjustments.

As of March 31, 2023, the Company does not have material operating or financing leases that have not yet commenced.

Maturities of operating lease liabilities as of March 31, 2023 were as follows:

Fiscal Year	Operating Lease (1)
Remainder of 2023	$	892.1
2024	1,096.6
2025	1,036.4
2026	976.4
2027	912.6
Thereafter	6,515.1
Total lease payments	11,429.2
Less amounts representing interest	(3,062.2)
Total lease liability	8,367.0
Less current portion of lease liability	790.1
Non-current lease liability	$	7,576.9

_______________

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

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GOODWILL AND OTHER INTANGIBLE ASSETS

3 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND OTHER INTANGIBLE ASSETS

GOODWILL AND OTHER INTANGIBLE ASSETS

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

	Property												Services		Total
	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Balance as of January 1, 2023	$	4,637.5	$	889.2	$	548.5	$	3,044.0	$	915.5	$	2,920.0	$	2.0	$	12,956.7
Other (1)	—		—		—		—		(20.7)		—		—		(20.7)
Effect of foreign currency translation	0.1		5.8		(18.7)		37.9		36.1		—		—		61.2
Balance as of March 31, 2023	$	4,637.6	$	895.0	$	529.8	$	3,081.9	$	930.9	$	2,920.0	$	2.0	$	12,997.2

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(1)Other represents the goodwill associated with Mexico Fiber, which was sold during the three months ended March 31, 2023.

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

		As of March 31, 2023						As of December 31, 2022
	Estimated Useful Lives (years)	Gross Carrying Value		Accumulated Amortization		Net Book Value		Gross Carrying Value		Accumulated Amortization		Net Book Value
Acquired network location intangibles (1)	Up to 20	$	6,076.0	$	(2,612.9)	$	3,463.1	$	6,058.2	$	(2,537.9)	$	3,520.3
Acquired tenant-related intangibles	Up to 20	18,979.2		(6,088.4)		12,890.8		18,941.2		(5,827.7)		13,113.5
Acquired licenses and other intangibles	2-20	1,772.3		(489.1)		1,283.2		1,772.9		(423.4)		1,349.5
Total other intangible assets		$	26,827.5	$	(9,190.4)	$	17,637.1	$	26,772.3	$	(8,789.0)	$	17,983.3

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

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

intangibles represent the value of acquired licenses, trade name and in place leases. In place lease value represents the fair value of costs avoided in securing data center customers, including vacancy periods, legal costs and commissions. In place lease value also includes assumptions on similar costs avoided upon the renewal or extension of existing leases on a basis consistent with occupancy assumptions used in the fair value of other assets.

The Company amortizes its acquired intangible assets on a straight-line basis over their estimated useful lives. As of March 31, 2023, the remaining weighted average amortization period of the Company’s intangible assets was 15 years. Amortization of intangible assets for the three months ended March 31, 2023 and 2022 was $369.5 million and $458.6 million, respectively. Based on current exchange rates, the Company expects to record amortization expense as follows over the remaining current year and the five subsequent years:

Fiscal Year	Amount
Remainder of 2023	$	1,061.2
2024	1,344.0
2025	1,292.5
2026	1,240.5
2027	1,226.1
2028	1,219.5

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ACCRUED EXPENSES

3 Months Ended

Mar. 31, 2023

Accrued Liabilities, Current [Abstract]

ACCRUED EXPENSES

ACCRUED EXPENSES

Accrued expenses consisted of the following:

	As of
	March 31, 2023		December 31, 2022
Accrued construction costs	$	151.8	$	230.8
Accrued income tax payable	30.7		29.8
Accrued pass-through costs	81.5		85.1
Amounts payable for acquisitions	11.5		55.2
Amounts payable to tenants	101.5		95.2
Accrued property and real estate taxes	275.3		270.1
Accrued rent	78.7		77.3
Payroll and related withholdings	88.5		140.4
Other accrued expenses	352.1		360.3
Total accrued expenses	$	1,171.6	$	1,344.2

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LONG-TERM OBLIGATIONS

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

LONG-TERM OBLIGATIONS

LONG-TERM OBLIGATIONS

Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums, debt issuance costs and fair value adjustments due to interest rate swaps consisted of the following:

	As of
	March 31, 2023		December 31, 2022		Maturity Date
2021 Multicurrency Credit Facility (1) (2)	$	2,882.7	$	3,788.7	June 30, 2025
2021 Term Loan (1)	996.5		996.3		January 31, 2027
2021 Credit Facility (1)	1,165.0		1,080.0		January 31, 2027
2021 EUR Three Year Delayed Draw Term Loan (1) (2)	894.0		882.9		May 28, 2024
2021 USD Two Year Delayed Draw Term Loan (1)	1,499.5		1,499.3		December 28, 2023
3.50% senior notes (3)	—		999.8		January 31, 2023
3.000% senior notes	697.9		694.5		June 15, 2023
0.600% senior notes	499.2		498.9		January 15, 2024
5.00% senior notes	1,000.2		1,000.5		February 15, 2024
3.375% senior notes	648.7		648.3		May 15, 2024
2.950% senior notes	646.9		646.4		January 15, 2025
2.400% senior notes	747.6		747.3		March 15, 2025
1.375% senior notes (4)	539.1		532.1		April 4, 2025

4.000% senior notes	747.1		746.8		June 1, 2025
1.300% senior notes	497.6		497.3		September 15, 2025
4.400% senior notes	498.3		498.1		February 15, 2026
1.600% senior notes	696.6		696.3		April 15, 2026
1.950% senior notes (4)	538.9		532.1		May 22, 2026
1.450% senior notes	594.8		594.5		September 15, 2026
3.375% senior notes	993.4		992.9		October 15, 2026
3.125% senior notes	398.7		398.6		January 15, 2027
2.750% senior notes	746.3		746.1		January 15, 2027
0.450% senior notes (4)	808.5		798.2		January 15, 2027
0.400% senior notes (4)	537.3		530.4		February 15, 2027
3.650% senior notes	643.7		643.3		March 15, 2027
3.55% senior notes	746.5		746.3		July 15, 2027
3.600% senior notes	695.4		695.1		January 15, 2028
0.500% senior notes (4)	806.8		796.6		January 15, 2028
1.500% senior notes	646.6		646.5		January 31, 2028
5.500% senior notes	692.6		—		March 15, 2028
3.950% senior notes	592.9		592.6		March 15, 2029
0.875% senior notes (4)	808.0		797.8		May 21, 2029
3.800% senior notes	1,637.3		1,636.8		August 15, 2029
2.900% senior notes	743.6		743.4		January 15, 2030
2.100% senior notes	742.4		742.2		June 15, 2030
0.950% senior notes (4)	535.3		528.5		October 5, 2030
1.875% senior notes	792.7		792.5		October 15, 2030
2.700% senior notes	694.6		694.4		April 15, 2031
2.300% senior notes	692.1		691.9		September 15, 2031
1.000% senior notes (4)	697.9		689.1		January 15, 2032
4.050% senior notes	642.4		642.2		March 15, 2032
5.650% senior notes	789.9		—		March 15, 2033
1.250% senior notes (4)	535.2		528.5		May 21, 2033
3.700% senior notes	592.3		592.2		October 15, 2049
3.100% senior notes	1,038.3		1,038.3		June 15, 2050
2.950% senior notes	1,022.7		1,022.5		January 15, 2051
Total American Tower Corporation debt	36,064.0		36,307.0
Series 2013-2A securities (5)	—		1,299.7		N/A
Series 2018-1A securities (6)	496.3		496.1		March 15, 2028
Series 2023-1A securities (7)	1,281.6		—		March 15, 2028
Series 2015-2 notes (8)	523.6		523.4		June 16, 2025
Other subsidiary debt (9)	155.5		16.2		Various
Total American Tower subsidiary debt	2,457.0		2,335.4
Finance lease obligations	21.0		27.8
Total	38,542.0		38,670.2
Less current portion of long-term obligations	(3,856.4)		(4,514.2)
Long-term obligations	$	34,685.6	$	34,156.0

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(1)Accrues interest at a variable rate.

(2)Reflects borrowings denominated in Euro (“EUR”) and, for the 2021 Multicurrency Credit Facility (as defined below), reflects borrowings denominated in both EUR and U.S. Dollars (“USD”).

(3)Repaid in full on January 31, 2023 using borrowings under the 2021 Credit Facility (as defined below).

(4)Notes are denominated in EUR.

(5)Repaid in full on the March 2023 repayment date using proceeds from the 2023 Securitization (as defined below).

(6)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2048.

(7)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2053.

(8)Maturity date reflects the anticipated repayment date; final legal maturity is June 15, 2050.

(9)Includes amounts drawn under letters of credit in Nigeria, which are denominated in USD, and the India Term Loan (as defined below), which is denominated in Indian Rupee (“INR”).

Current portion of long-term obligations— The Company’s current portion of long-term obligations primarily includes (i) $1.5 billion in borrowings under the 2021 USD Two Year Delayed Draw Term Loan (as defined below), (ii) $700.0 million aggregate principal amount of the Company’s 3.000% senior unsecured notes due June 15, 2023, (iii) $500.0 million aggregate principal amount of the Company’s 0.600% senior unsecured notes due January 15, 2024 and (iv) $1.0 billion aggregate principal amount of the Company’s 5.00% senior unsecured notes due February 15, 2024.

Securitized Debt—Cash flows generated by the communications sites that secure the securitized debt of the Company are only available for payment of such debt and are not available to pay the Company’s other obligations or the claims of its creditors. However, subject to certain restrictions, the Company holds the right to receive the excess cash flows not needed to service the securitized debt and other obligations arising out of the securitizations. The securitized debt is the obligation of the issuers thereof or borrowers thereunder, as applicable, and their subsidiaries, and not of the Company or its other subsidiaries.

Repayment of Series 2013-2A Securities—On the March 2023 repayment date, the Company repaid the entire $1.3 billion aggregate principal amount outstanding under the Company’s Secured Tower Revenue Securities, Series 2013-2A due 2023 (the “Series 2013-2A Notes”), pursuant to the terms of the agreements governing such securities. The repayment was funded with proceeds from the 2023 Securitization (as defined below).

Secured Tower Revenue Securities, Series 2023-1, Subclass A and Series 2023-1, Subclass R—On March 13, 2023, the Company completed a securitization transaction (the “2023 Securitization”), in which American Tower Trust I (the “Trust”) issued $1.3 billion aggregate principal amount of Secured Tower Revenue Securities, Series 2023-1, Subclass A (the “Series 2023-1A Securities”). To satisfy the applicable risk retention requirements of Regulation RR promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act” and, such requirements, the “Risk Retention Rules”), the Trust issued, and one of the Company’s affiliates purchased, $68.5 million aggregate principal amount of Secured Tower Revenue Securities, Series 2023-1, Subclass R (the “Series 2023-1R Securities” and, together with the Series 2023-1A Securities, the “2023 Securities”) to retain an “eligible horizontal residual interest” (as defined in the Risk Retention Rules) in an amount equal to at least 5% of the fair value of the 2023 Securities.

The assets of the Trust consist of a nonrecourse componentized loan, which also secures each of (i) the Secured Tower Revenue Securities, Series 2018-1, Subclass A (the “Series 2018-1A Securities”) and (ii) the Secured Tower Revenue Securities, Series 2018-1, Subclass R (the “Series 2018-1R Securities” and, together with the Series 2018-1A Securities, the “2018 Securities”) issued in a securitization transaction in March 2018 (the “2018 Securitization” and, together with the 2023 Securitization, the “Trust Securitizations”) (the “Loan”) made by the Trust to American Tower Asset Sub, LLC and American Tower Asset Sub II, LLC (together, the “AMT Asset Subs”). The AMT Asset Subs are jointly and severally liable under the Loan, which is secured primarily by mortgages on the AMT Asset Subs’ interests in 5,036 broadcast and wireless communications towers and related assets (the “Trust Sites”).

The 2023 Securities correspond to components of the Loan made to the AMT Asset Subs pursuant to the Second Supplement and Amendment dated as of March 13, 2023 (the “2023 Supplement”) to the Second Amended and Restated Loan and Security Agreement dated as of March 29, 2018 (the “Loan Agreement,” which continues to govern the 2018 Securities, and collectively, the “Trust Loan Agreement”).

The 2023 Securities represent a pass-through interest in the components of the Loan corresponding to the 2023 Securities. The Series 2023-1A Securities have an interest rate of 5.490% and the Series 2023-1R Securities have an interest rate of 5.735%. The 2023 Securities have an expected life of approximately five years with a final repayment date in March 2053.

The debt service on the Loan will be paid solely from the cash flows generated from the operation of the Trust Sites held by the AMT Asset Subs. The AMT Asset Subs are required to make monthly payments of interest on the Loan. Subject to certain limited exceptions described below, no payments of principal will be required to be made on the components of the Loan corresponding to the 2023 Securities prior to the monthly payment date in March 2028, which is the anticipated repayment date for such components.

The AMT Asset Subs may prepay the Loan at any time, provided it is accompanied by applicable prepayment consideration. If the prepayment occurs within twelve months of the anticipated repayment date for the 2023 Securities, no prepayment consideration is due. The entire unpaid principal balance of the components of the Loan corresponding to the 2023 Securities will be due in March 2053.

Under the Trust Loan Agreement, the AMT Asset Subs are required to maintain reserve accounts, including for ground rents, real estate and personal property taxes and insurance premiums, and, in certain circumstances, to reserve a portion of advance rents from tenants on the Trust Sites. Based on the terms of the Trust Loan Agreement, all rental cash receipts received each month are reserved for the succeeding month and held in an account controlled by the trustee and then released. The $77.7 million held in the reserve accounts as of March 31, 2023 is classified as restricted cash on the Company’s accompanying condensed consolidated balance sheet.

Repayment of 3.50% Senior Notes—On January 31, 2023, the Company repaid $1.0 billion aggregate principal amount of the 3.50% senior unsecured notes due 2023 (the “3.50% Notes”) upon their maturity. The 3.50% Notes were repaid using borrowings under the 2021 Credit Facility. Upon completion of the repayment, none of the 3.50% Notes remained outstanding.

Offering of Senior Notes

5.500% Senior Notes and 5.650% Senior Notes Offering—On March 3, 2023, the Company completed a registered public offering of $700.0 million aggregate principal amount of 5.500% senior unsecured notes due 2028 (the “5.500% Notes”) and $800.0 million aggregate principal amount of 5.650% senior unsecured notes due 2033 (the “5.650% Notes” and, together with the 5.500% Notes, the “Notes”). The net proceeds from this offering were approximately $1,480.9 million, after deducting commissions and estimated expenses. The Company used the net proceeds to repay existing indebtedness under the 2021 Multicurrency Credit Facility and the 2021 Credit Facility.

The key terms of the Notes are as follows:

Senior Notes	Aggregate Principal Amount (in millions)		Issue Date and Interest Accrual Date	Maturity Date	Contractual Interest Rate	First Interest Payment	Interest Payments Due (1)	Par Call Date (2)
5.500% Notes	$	700.0	March 3, 2023	March 15, 2028	5.500%	September 15, 2023	March 15 and September 15	February 15, 2028
5.650% Notes	$	800.0	March 3, 2023	March 15, 2033	5.650%	September 15, 2023	March 15 and September 15	December 15, 2032

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(1)Accrued and unpaid interest on USD denominated notes is payable in USD semi-annually in arrears and will be computed from the issue date on the basis of a 360-day year comprised of twelve 30-day months.

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

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

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

Bank Facilities

2021 Multicurrency Credit Facility—During the three months ended March 31, 2023, the Company borrowed an aggregate of $725.0 million and repaid an aggregate of $1.6 billion of revolving indebtedness under the Company’s $6.0 billion senior unsecured multicurrency revolving credit facility, as amended and restated in December 2021 (the “2021 Multicurrency Credit Facility”). The Company used the borrowings for general corporate purposes.

2021 Credit Facility—During the three months ended March 31, 2023, the Company borrowed an aggregate of $1.0 billion and repaid an aggregate of $935.0 million of revolving indebtedness under the Company’s $4.0 billion senior unsecured revolving credit facility, as amended and restated in December 2021 (the “2021 Credit Facility”). The Company used the borrowings to repay outstanding indebtedness, including the 3.50% Notes.

As of March 31, 2023, the key terms under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the Company’s $1.0 billion unsecured term loan, as amended and restated in December 2021 (the “2021 Term Loan”), the Company’s 825.0 million EUR unsecured term loan, as amended and restated in December 2021 (the “2021 EUR Three Year Delayed Draw Term Loan”) and the Company’s $1.5 billion unsecured term loan entered into in December 2021 (the “2021 USD Two Year Delayed Draw Term Loan”) were as follows:

	Outstanding Principal Balance (in millions)		Undrawn letters of credit (in millions)		Maturity Date		Current margin over LIBOR or EURIBOR (1)		Current commitment fee (2)
2021 Multicurrency Credit Facility	$	2,882.7	$	3.5	June 30, 2025	(3)	1.125	%	0.110	%
2021 Credit Facility	1,165.0		30.5		January 31, 2027	(3)	1.125	%	0.110	%
2021 Term Loan	1,000.0		N/A		January 31, 2027		1.125	%	N/A
2021 EUR Three Year Delayed Draw Term Loan	894.2		N/A		May 28, 2024		1.125	%	N/A
2021 USD Two Year Delayed Draw Term Loan	1,500.0		N/A		December 28, 2023		1.125	%	N/A

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(1)London Interbank Offered Rate (“LIBOR”) applies to the USD denominated borrowings under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan and the 2021 USD Two Year Delayed Draw Term Loan. Euro Interbank Offer Rate (“EURIBOR”) applies to the EUR denominated borrowings under the 2021 Multicurrency Credit Facility and all of the borrowings under the 2021 EUR Three Year Delayed Draw Term Loan.

(2)Fee on undrawn portion of each credit facility.

(3)Subject to two optional renewal periods.

India Term Loan—On February 16, 2023, the Company entered into a 12.0 billion INR (approximately $145.1 million at the date of signing) unsecured term loan with a maturity date that is one year from the date of the first draw thereunder (the “India Term Loan”). On February 17, 2023, the Company borrowed 10.0 billion INR (approximately $120.7 million at the date of borrowing) under the India Term Loan. The India Term Loan bears interest at the three month treasury bill rate as announced by the Financial Benchmarks India Private Limited plus a margin of 1.95%. Any outstanding principal and accrued but unpaid interest will be due and payable in full at maturity. The India Term Loan does not require amortization of principal and may be paid prior to maturity in whole or in part at the Company’s option without penalty or premium.

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FAIR VALUE MEASUREMENTS

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

The Company determines the fair value of its financial instruments based on the fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Below are the three levels of inputs that may be used to measure fair value:

Level 1	Quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.
Level 2	Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3	Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Items Measured at Fair Value on a Recurring Basis—The fair values of the Company’s financial assets and liabilities that are required to be measured on a recurring basis at fair value were as follows:

	March 31, 2023					December 31, 2022
	Fair Value Measurements Using					Fair Value Measurements Using
	Level 1		Level 2		Level 3	Level 1		Level 2		Level 3
Assets:
Investments in equity securities (1)	$	30.4	—		—	$	29.2	—		—
VIL OCDs	—		$	101.6	—	—		—		—
Liabilities:
Interest rate swap agreements	—		$	3.1	—	—		$	6.2	—
Fair value of debt related to interest rate swap agreements (2)	$	(1.8)	—		—	$	(4.9)	—		—

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(1)Investments in equity securities are recorded in Notes receivable and other non-current assets in the consolidated balance sheet at fair value. Unrealized holding gains and losses for equity securities are recorded in Other income (expense) in the consolidated statements of operations in the current period. During the three months ended March 31, 2023 and 2022, the Company recognized unrealized gains of $1.2 million and $9.5 million for equity securities held as of March 31, 2023.

(2)Included in the carrying values of the corresponding debt obligations.

During the three months ended March 31, 2023, the Company made no changes to the methods described in note 11 to its consolidated financial statements included in the 2022 Form 10-K that it used to measure the fair value of its interest rate swap agreements.

VIL Optionally Convertible Debentures—In February 2023, one of the Company’s customers in India, Vodafone Idea Limited (“VIL”), issued optionally convertible debentures (the “VIL OCDs”) to the Company’s subsidiary, ATC Telecom Infrastructure Private Limited (“ATC TIPL”), in exchange for VIL’s payment of certain amounts towards accounts receivables. The VIL OCDs are to be repaid by VIL with interest and ATC TIPL has the option to convert the debentures into equity of VIL. The VIL OCDs were issued for an aggregate face value of 16.0 billion INR (approximately $193.2 million on the date of issuance). The VIL OCDs mature in tranches with 8.0 billion INR (approximately $96.6 million on the date of issuance) maturing on August 27, 2023 and 8.0 billion INR (approximately $96.6 million on the date of issuance) maturing on August 27, 2024. The fair value of the VIL OCDs at issuance was approximately $116.5 million. The VIL OCDs accrue interest at a rate of 11.2% annually. Interest is payable to ATC TIPL semi-annually beginning on August 27, 2023.

The VIL OCDs are recorded in Prepaid and other current assets and Notes receivable and other non-current assets in the consolidated balance sheet at fair value. The significant input to the fair value of the VIL OCDs is the VIL equity share price underlying the instruments, less a liquidity discount. Unrealized holding gains and losses for the VIL OCDs are recorded in Other income (expense) in the consolidated statements of operations in the current period. During the three months ended March 31, 2023, the Company recognized unrealized losses of $15.7 million for the VIL OCDs held as of March 31, 2023.

 Items Measured at Fair Value on a Nonrecurring Basis

Assets Held and Used—The Company’s long-lived assets are recorded at amortized cost and, if impaired, are adjusted to fair value using Level 3 inputs. There were no material impairments during the three months ended March 31, 2023 and 2022 and there were no significant unobservable inputs used to determine fair value during the three months ended March 31, 2023 or 2022. There were no other items measured at fair value on a nonrecurring basis during the three months ended March 31, 2023 or 2022.

Fair Value of Financial Instruments—The Company’s financial instruments for which the carrying value reasonably approximates fair value at March 31, 2023 and December 31, 2022 include cash and cash equivalents, restricted cash, accounts receivable and accounts payable. The Company’s estimates of fair value of its long-term obligations, including the current portion, are based primarily upon reported market values. For long-term debt not actively traded, fair value is estimated using either indicative price quotes or a discounted cash flow analysis using rates for debt with similar terms and maturities. As of March 31, 2023 and December 31, 2022, the carrying value of long-term obligations, including the current portion, was $38.5 billion and $38.7 billion, respectively. As of March 31, 2023, the fair value of long-term obligations, including the current portion, was $35.5 billion, of which $25.6 billion was measured using Level 1 inputs and $9.9 billion was measured using Level 2 inputs. As of December 31, 2022, the fair value of long-term obligations, including the current portion, was $35.1 billion, of which $24.5 billion was measured using Level 1 inputs and $10.6 billion was measured using Level 2 inputs.

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INCOME TAXES

3 Months Ended

Mar. 31, 2023

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

The Company provides for income taxes at the end of each interim period based on the estimated effective tax rate (“ETR”) for the full fiscal year. Cumulative adjustments to the Company’s estimate are recorded in the interim period in which a change in the estimated annual ETR is determined. Under the provisions of the Internal Revenue Code of 1986, as amended, the Company may deduct amounts distributed to stockholders against the income generated by its real estate investment trust (“REIT”) operations. The Company continues to be subject to income taxes on the income of its domestic taxable REIT subsidiaries and income taxes in foreign jurisdictions where it conducts operations.

The Company provides valuation allowances if, based on the available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. Management assesses the available evidence to estimate if sufficient future taxable income will be generated to use the existing deferred tax assets. Valuation allowances may be reversed if, based on changes in facts and circumstances, the net deferred tax assets have been determined to be realizable.

The increase in the income tax provision during the three months ended March 31, 2023 was primarily attributable to the reversal of valuation allowances in certain foreign jurisdictions during the three months ended March 31, 2022. The increase in the income tax provision during the three months ended March 31, 2023 was also attributable to increased earnings in certain foreign jurisdictions, offset by fewer additions to reserves for the Company’s existing tax positions during the three months ended March 31, 2023.

As of March 31, 2023 and December 31, 2022, the total unrecognized tax benefits that would impact the ETR, if recognized, were approximately $86.9 million and $103.6 million, respectively. The amount of unrecognized tax benefits during the three months ended March 31, 2023 includes (i) additions to the Company’s existing tax positions of $1.2 million, (ii) additions due to foreign currency exchange rate fluctuations of $1.2 million, (iii) reductions due to settlements of $7.5 million and (iv) reductions due to credits available against existing tax positions of $11.6 million. Unrecognized tax benefits are expected to change over the next 12 months if certain tax matters ultimately settle with the applicable taxing jurisdiction during this time frame, as described in note 12 to the Company’s consolidated financial statements included in the 2022 Form 10-K. The impact of the amount of these changes to previously recorded uncertain tax positions could range from zero to $18.0 million.

The Company recorded the following penalties and income tax-related interest expense during the three months ended March 31, 2023 and 2022:

	Three Months Ended March 31,
	2023		2022
Penalties and income tax-related interest expense	$	2.8	$	7.3

As of March 31, 2023 and December 31, 2022, the total amount of accrued income tax related interest and penalties included in the consolidated balance sheets were $43.9 million and $43.3 million, respectively.

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STOCK-BASED COMPENSATION

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION Summary of Stock-Based Compensation Plans—The Company maintains equity incentive plans that provide for the grant of stock-based awards to its directors, officers and employees. The Company’s 2007 Equity Incentive Plan, as amended (the “2007 Plan”), provides for the grant of non-qualified and incentive stock options, as well as restricted stock units, restricted stock and other stock-based awards. Exercise prices for non-qualified and incentive stock options are not less than the fair value of the underlying common stock on the date of grant. Equity awards typically vest ratably. Awards granted prior to March 10, 2023 generally vest over four years for time-based restricted stock units (“RSUs”)

and stock options. In December 2022, the Company’s Compensation Committee changed the terms of its awards to generally vest over three years. The change in vesting terms is applicable for new awards granted beginning on March 10, 2023 and does not change the vesting terms applicable to grants awarded prior to March 10, 2023. The impact of the change in vesting terms is estimated to be approximately $7.9 million for the year ended December 31, 2023. Performance-based restricted stock units (“PSUs”) generally vest over three years. Stock options generally expire ten years from the date of grant. As of March 31, 2023, the Company had the ability to grant stock-based awards with respect to an aggregate of 4.0 million shares of common stock under the 2007 Plan. In addition, the Company maintains an employee stock purchase plan (the “ESPP”) pursuant to which eligible employees may purchase shares of the Company’s common stock on the last day of each bi-annual offering period at a 15% discount from the lower of the closing market value on the first or last day of such offering period. The offering periods run from June 1 through November 30 and from December 1 through May 31 of each year.

During the three months ended March 31, 2023 and 2022, the Company recorded the following stock-based compensation expense in selling, general, administrative and development expense:

	Three Months Ended March 31,
	2023		2022
Stock-based compensation expense	$	65.5	$	56.7

Stock Options—As of March 31, 2023, there was no unrecognized compensation expense related to unvested stock options.

The Company’s option activity for the three months ended March 31, 2023 was as follows (shares disclosed in full amounts):

	Number of Options
Outstanding as of January 1, 2023	855,154
Exercised	(21,526)
Forfeited	—
Expired	—
Outstanding as of March 31, 2023	833,628

Restricted Stock Units—As of March 31, 2023, total unrecognized compensation expense related to unvested RSUs granted under the 2007 Plan was $289.3 million and is expected to be recognized over a weighted average period of approximately two years. Vesting of RSUs is subject generally to the employee’s continued employment or death, disability or qualified retirement (each as defined in the applicable RSU award agreement).

Performance-Based Restricted Stock Units—During the three months ended March 31, 2023, the Company’s Compensation Committee (the “Compensation Committee”) granted an aggregate of 118,684 PSUs (the “2023 PSUs”) to its executive officers and established the performance metrics for these awards. During the years ended December 31, 2022 and 2021, the Compensation Committee granted an aggregate of 98,542 PSUs (the “2022 PSUs”) and 98,694 PSUs (the “2021 PSUs”), respectively, to its executive officers and established the performance metrics for these awards. Threshold, target and maximum parameters were established for the metrics for a three-year performance period with respect to each of the 2023 PSUs, the 2022 PSUs and the 2021 PSUs and will be used to calculate the number of shares that will be issuable when each award vests, which may range from zero to 200% of the target amounts. At the end of each three-year performance period, the number of shares that vest will depend on the degree of achievement against the pre-established performance goals. PSUs will be paid out in common stock at the end of each performance period, subject generally to the executive’s continued employment or death, disability or qualified retirement (each as defined in the applicable PSU award agreement). PSUs will accrue dividend equivalents prior to vesting, which will be paid out only in respect of shares that actually vest.

Restricted Stock Units and Performance-Based Restricted Stock Units—The Company’s RSU and PSU activity for the three months ended March 31, 2023 was as follows (shares disclosed in full amounts): 

	RSUs	PSUs
Outstanding as of January 1, 2023 (1)	1,382,879	276,468
Granted (2)	945,029	118,684
Vested and Released (3)	(511,200)	(46,850)
Forfeited	(23,247)	—
Outstanding as of March 31, 2023	1,793,461	348,302
Vested and deferred as of March 31, 2023 (4)	—	12,677

_______________

(1)PSUs consist of the target number of shares issuable at the end of the three-year performance period for the outstanding 2022 PSUs and the outstanding 2021 PSUs, or 98,542 shares and 98,694 shares, respectively, and the shares issuable at the end of the three-year performance period for the PSUs granted in 2020 (the “2020 PSUs”) based on achievement against the performance metrics for the three-year performance period, or 79,232 shares.

(2)PSUs consist of the target number of shares issuable at the end of the three-year performance period for the 2023 PSUs, or 118,684 shares.

(3)PSUs consist of shares vested pursuant to the 2020 PSUs. There are no additional shares to be earned related to the 2020 PSUs. As of March 31, 2023, 19,705 earned shares remain outstanding and will vest in May 2023.

(4)Vested and deferred PSUs are related to deferred compensation for certain former employees.

During the three months ended March 31, 2023, the Company recorded $6.8 million, respectively, in stock-based compensation expense for equity awards in which the performance goals have been established and were probable of being achieved. The remaining unrecognized compensation expense related to these awards at March 31, 2023 was $25.4 million based on the Company’s current assessment of the probability of achieving the performance goals. The weighted average period over which the cost will be recognized is approximately three years.

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EQUITY

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

EQUITY

EQUITY

Sales of Equity Securities—The Company receives proceeds from sales of its equity securities pursuant to the ESPP and upon exercise of stock options granted under the 2007 Plan. During the three months ended March 31, 2023, the Company received an aggregate of $1.8 million in proceeds upon exercises of stock options.

2020 “At the Market” Stock Offering Program—In August 2020, the Company established an “at the market” stock offering program through which it may issue and sell shares of its common stock having an aggregate gross sales price of up to $1.0 billion (the “2020 ATM Program”). Sales under the 2020 ATM Program may be made by means of ordinary brokers’ transactions on the New York Stock Exchange or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or, subject to specific instructions of the Company, at negotiated prices. The Company intends to use the net proceeds from any issuances under the 2020 ATM Program for general corporate purposes, which may include, among other things, the funding of acquisitions, additions to working capital and repayment or refinancing of existing indebtedness. As of March 31, 2023, the Company has not sold any shares of common stock under the 2020 ATM Program.

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

Under the Buyback Programs, the Company is authorized to purchase shares from time to time through open market purchases, in privately negotiated transactions not to exceed market prices, and (with respect to such open market purchases) pursuant to plans adopted in accordance with Rule 10b5-1 under the Exchange Act in accordance with securities laws and other legal requirements and subject to market conditions and other factors.

During the three months ended March 31, 2023, there were no repurchases under either of the Buyback Programs. As of March 31, 2023, the Company has repurchased a total of 14,451,325 shares of its common stock under the 2011 Buyback for an aggregate of $1.5 billion, including commissions and fees. As of March 31, 2023, the Company has not made any repurchases under the 2017 Buyback.

The Company expects to fund any further repurchases of its common stock through a combination of cash on hand, cash generated by operations and borrowings under its credit facilities. Repurchases under the Buyback Programs are subject to, among other things, the Company having available cash to fund the repurchases.

Distributions—During the three months ended March 31, 2023, the Company declared or paid the following cash distributions (per share data reflects actual amounts):

Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (1)
Common Stock
March 8, 2023	April 28, 2023	April 14, 2023	$	1.56	$	727.0
December 7, 2022	February 2, 2023	December 28, 2022	$	1.56	$	726.3

_______________

(1)Does not include amounts accrued for distributions payable related to unvested restricted stock units.

During the three months ended March 31, 2022, the Company declared or paid the following cash distributions (per share data reflects actual amounts):

Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (1)
Common Stock
March 10, 2022	April 29, 2022	April 13, 2022	$	1.40	$	638.8
December 15, 2021	January 14, 2022	December 27, 2021	$	1.39	$	633.5

_______________

(1)Does not include amounts accrued for distributions payable related to unvested restricted stock units.

The Company accrues distributions on unvested restricted stock units, which are payable upon vesting. As of March 31, 2023, the amount accrued for distributions payable related to unvested restricted stock units was $13.0 million. During the three months ended March 31, 2023 and 2022, the Company paid $6.6 million and $6.6 million of distributions upon the vesting of restricted stock units, respectively. To maintain its qualification for taxation as a REIT, the Company expects to continue paying distributions, the amount, timing and frequency of which will be determined, and subject to adjustment, by the Company’s Board of Directors.

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NONCONTROLLING INTERESTS

3 Months Ended

Mar. 31, 2023

Noncontrolling Interest [Abstract]

NONCONTROLLING INTERESTS

NONCONTROLLING INTERESTS

European Interests—In 2021, PGGM converted its previously held noncontrolling interest in a subsidiary that primarily consisted of the Company’s operations in France, Germany and Poland (“Former ATC Europe”) into noncontrolling interests in subsidiaries, consisting of the Company's operations in Germany and Spain. In 2021, Caisse de dépôt et placement du Québec (“CDPQ”) and Allianz insurance companies and funds managed by Allianz Capital Partners GmbH, including the Allianz European Infrastructure Fund (collectively, “Allianz”) acquired 30% and 18% noncontrolling interests, respectively, in ATC Europe (the “ATC Europe Transactions”) for total aggregate consideration of 2.6 billion EUR (approximately $3.1 billion at the date of closing).

As of March 31, 2023, ATC Europe consists of the Company’s operations in France, Germany, Poland and Spain. The Company currently holds a 52% controlling interest in ATC Europe, with CDPQ and Allianz holding 30% and 18% noncontrolling interests, respectively. ATC Europe holds a 100% interest in the subsidiaries that consist of the Company’s operations in France and Poland and an 87% and an 83% controlling interest in the subsidiaries that consist of the Company’s operations in Germany and Spain, respectively, with PGGM holding a 13% and a 17% noncontrolling interest in each respective subsidiary.

Bangladesh Partnership—In 2021, the Company acquired a 51% controlling interest in Kirtonkhola Tower Bangladesh Limited (“KTBL”) for 900 million Bangladeshi Taka (“BDT”) (approximately $10.6 million at the date of closing). Confidence Group holds a 49% noncontrolling interest in KTBL.

Stonepeak Transaction—In July 2022, the Company entered into an agreement pursuant to which certain investment vehicles affiliated with Stonepeak Partners LP (such investment vehicles, collectively, “Stonepeak”) acquired a noncontrolling ownership interest in the Company’s U.S. data center business. The transaction was completed in August 2022 for total aggregate consideration of $2.5 billion, through an investment in common equity of $1,750.0 million and mandatorily convertible preferred equity of $750.0 million. In October 2022, the Company entered into an agreement with Stonepeak for Stonepeak to acquire additional common equity and mandatorily preferred equity interests in the Company’s U.S. data center business for total aggregate consideration of $570.0 million (together with the August 2022 closing, the “Stonepeak Transaction”).

As of March 31, 2023, the Company holds a common equity interest of approximately 72% in its U.S. data center business, with Stonepeak holding approximately 28% of the outstanding common equity and 100% of the outstanding mandatorily convertible preferred equity. On a fully converted basis, which is expected to occur four years from the date of closing in August 2022, and on the basis of the currently outstanding equity, the Company will hold a controlling ownership interest of approximately 64%, with Stonepeak holding approximately 36%. The mandatorily convertible preferred equity, which accrues dividends at 5.0%, will convert into common equity on a one for one basis, subject to adjustment that will be measured on the conversion date.

Dividends to noncontrolling interests—Certain of the Company’s subsidiaries may, from time to time, declare dividends. During the three months ended March 31, 2023, the Company’s U.S. data center business had distributions of $11.4 million related to the outstanding Stonepeak mandatorily convertible preferred equity (the “Stonepeak Preferred Distributions”). As of March 31, 2023, the amount accrued for Stonepeak Preferred Distributions was $11.4 million.

The changes in noncontrolling interests were as follows:

	Three Months Ended March 31,
	2023		2022
Balance as of January 1,	$	6,836.1	$	3,988.4
Net loss attributable to noncontrolling interests	(20.8)		(9.0)
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	39.9		(91.5)
Distributions to noncontrolling interest holders (1)	(11.5)		(0.2)
Balance as of March 31,	$	6,843.7	$	3,887.7

_______________

(1)For the three months ended March 31, 2023, primarily includes $11.4 million of Stonepeak Preferred Distributions.

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EARNINGS PER COMMON SHARE

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

EARNINGS PER COMMON SHARE

EARNINGS PER COMMON SHARE

The following table sets forth basic and diluted net income per common share computational data (shares in thousands, except per share data):

	Three Months Ended March 31,
	2023		2022
Net income attributable to American Tower Corporation common stockholders	$	335.8	$	711.7
Basic weighted average common shares outstanding	465,741		455,946
Dilutive securities	1,069		1,265
Diluted weighted average common shares outstanding	466,810		457,211
Basic net income attributable to American Tower Corporation common stockholders per common share	$	0.72	$	1.56
Diluted net income attributable to American Tower Corporation common stockholders per common share	$	0.72	$	1.56

Shares Excluded From Dilutive Effect—The following shares were not included in the computation of diluted earnings per share because the effect would be anti-dilutive (in thousands, on a weighted average basis):

	Three Months Ended March 31,
	2023	2022
Restricted stock units	5	106

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COMMITMENTS AND CONTINGENCIES

3 Months Ended

Mar. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

Litigation—The Company periodically becomes involved in various claims, lawsuits and proceedings that are incidental to its business. In the opinion of Company management, after consultation with counsel, there are no matters currently pending that would, in the event of an adverse outcome, materially impact the Company’s consolidated financial position, results of operations or liquidity.

Verizon Transaction—In March 2015, the Company entered into an agreement with various operating entities of Verizon Communications Inc. (“Verizon”) that currently provides for the lease, sublease or management of approximately 11,250 wireless communications sites commencing March 27, 2015. The average term of the lease or sublease for all communications sites at the inception of the agreement was approximately 28 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the leased sites in tranches, subject to the applicable lease, sublease or management rights upon its scheduled expiration. Each tower is assigned to an annual tranche, ranging from 2034 to 2047, which represents the outside expiration date for the sublease rights to the towers in that tranche. The purchase price for each tranche is a fixed amount stated in the lease for such tranche plus the fair market value of certain alterations made to the related towers. The aggregate purchase option price for the towers leased and subleased is approximately $5.0 billion. Verizon will occupy the sites as a tenant for an initial term of ten years with eight optional successive five-year terms, each of which is governed by standard master lease agreement terms established as a part of the transaction.

AT&T Transaction—The Company has an agreement with SBC Communications Inc., a predecessor entity to AT&T Inc. (“AT&T”), that currently provides for the lease or sublease of approximately 1,900 towers commencing between December 2000 and August 2004. Substantially all of the towers are part of the Trust Securitizations. The average term of the lease or sublease for all communications sites at the inception of the agreement was approximately 27 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the sites subject to the applicable lease or sublease upon its expiration. Each tower is assigned to an annual tranche, ranging from 2013 to 2032, which represents the outside expiration date for the sublease rights to that tower. The purchase price for each site is a fixed amount stated in the lease for that site plus the fair market value of certain alterations made to the related tower by AT&T. As of March 31, 2023, the Company has purchased an aggregate of approximately 500 of the subleased towers which are subject to the applicable agreement. The aggregate purchase option price for the remaining towers leased and subleased is $1.1 billion and includes per annum accretion through the applicable expiration of the lease or sublease of a site. For all these sites, AT&T has the right to continue to lease the reserved space through June 30, 2025 at the then-current monthly fee, which will escalate in accordance with the standard master lease agreement for the remainder of AT&T’s tenancy. Thereafter, AT&T has the right to renew the lease for up to five successive five-year terms.

Other Contingencies—The Company is subject to income tax and other taxes in the geographic areas where it holds assets or operates, and periodically receives notifications of audits, assessments or other actions by taxing authorities. Taxing authorities may issue notices or assessments while audits are being conducted. In certain jurisdictions, taxing authorities may issue assessments with minimal examination. These notices and assessments do not represent amounts that the Company is obligated to pay and are often not reflective of the actual tax liability for which the Company will ultimately be liable. In the process of responding to assessments of taxes that the Company believes are not enforceable, the Company avails itself of both administrative and judicial remedies. The Company evaluates the circumstances of each notification or assessment based on the information available and, in those instances in which the Company does not anticipate a successful defense of positions taken in its tax filings, a liability is recorded in the appropriate amount based on the underlying assessment.

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ACQUISITIONS

3 Months Ended

Mar. 31, 2023

Business Combination and Asset Acquisition [Abstract]

ACQUISITIONS

ACQUISITIONS

Impact of current year acquisitions—The Company typically acquires communications sites and other communications infrastructure assets from wireless carriers or other tower operators and subsequently integrates those sites and related assets into its existing portfolio of communications sites and related assets. In the United States, acquisitions may also include data center facilities and related assets. The financial results of the Company’s acquisitions have been included in the Company’s consolidated statements of operations for the three months ended March 31, 2023 from the date of the respective acquisition. The date of acquisition, and by extension the point at which the Company begins to recognize the results of an acquisition, may depend on, among other things, the receipt of contractual consents, the commencement and extent of leasing arrangements and the timing of the transfer of title or rights to the assets, which may be accomplished in phases. Communications sites acquired from communications service providers may never have been operated as a business and may instead have been utilized solely by the seller as a component of its network infrastructure. An acquisition may or may not involve the transfer of business operations or employees.

The Company evaluates each of its acquisitions under the accounting guidance framework to determine whether to treat an acquisition as an asset acquisition or a business combination. For those transactions treated as asset acquisitions, the purchase price is allocated to the assets acquired, with no recognition of goodwill.

For those acquisitions accounted for as business combinations, the Company recognizes acquisition and merger related expenses in the period in which they are incurred and services are received; for transactions accounted for as asset acquisitions, these costs are capitalized as part of the purchase price. Acquisition and merger related costs may include finder’s fees, advisory, legal, accounting, valuation and other professional or consulting fees and general administrative costs directly related to completing the transaction. Integration costs include incremental and non-recurring costs necessary to convert data and systems, retain employees and otherwise enable the Company to operate acquired businesses or assets efficiently. The Company records acquisition and merger related expenses for business combinations, as well as integration costs for all acquisitions, in Other operating expenses in the consolidated statements of operations.

During the three months ended March 31, 2023 and 2022, the Company recorded acquisition and merger related expenses for business combinations and non-capitalized asset acquisition costs and integration costs as follows:

	Three Months Ended March 31,
	2023		2022
Acquisition and merger related expenses	$	5.0	$	5.7
Integration costs	$	2.6	$	10.0

During the three months ended March 31, 2022, the Company also recorded benefits of $1.6 million, related to pre-acquisition contingencies and settlements.

2023 Transactions

The estimated aggregate impact of the acquisitions completed in 2023 on the Company’s revenues and gross margin for the three months ended March 31, 2023 was not material to the Company’s operating results.

Other Acquisitions—During the three months ended March 31, 2023, the Company acquired a total of 8 communications sites, as well as other communications infrastructure assets, in the United States, Canada, Poland and Spain for an aggregate purchase price of $17.5 million. Of the aggregate purchase price, $8.4 million is reflected as a payable in the consolidated balance sheet as of March 31, 2023. These acquisitions were accounted for as asset acquisitions.

The following table summarizes the allocations of the purchase prices for the fiscal year 2023 acquisitions based upon their estimated fair value at the date of acquisition:

	Other
Current assets	$	1.5
Property and equipment	7.5
Intangible assets (1):
Tenant-related intangible assets	8.0
Network location intangible assets	0.8
Other non-current assets	0.8
Current liabilities	(0.2)
Other non-current liabilities	(0.9)
Net assets acquired	17.5
Fair value of net assets acquired	17.5
Purchase price	$	17.5

_______________

(1)Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis over the estimated useful lives of the assets.

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BUSINESS SEGMENTS

3 Months Ended

Mar. 31, 2023

Segment Reporting [Abstract]

BUSINESS SEGMENTS

BUSINESS SEGMENTS

Property

Communications Sites and Related Communications Infrastructure—The Company’s primary business is leasing space on multitenant communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. The Company has historically reported these operations on a geographic basis.

Data Centers—The Company’s Data Centers segment relates to data center facilities and related assets that the Company owns and operates in the United States. The Data Centers segment offers different types of leased spaces and related services from, and requires different resources, skill sets and marketing strategies than, the existing property operating segment in the U.S. & Canada.

As of March 31, 2023, the Company’s property operations consisted of the following:

•U.S. & Canada: property operations in Canada and the United States;

•Asia-Pacific: property operations in Australia, Bangladesh, India, New Zealand and the Philippines;

•Africa: property operations in Burkina Faso, Ghana, Kenya, Niger, Nigeria, South Africa and Uganda;

•Europe: property operations in France, Germany, Poland and Spain;

•Latin America: property operations in Argentina, Brazil, Chile, Colombia, Costa Rica, Mexico, Paraguay and Peru; and

•Data Centers: data center property operations in the United States.

Services—The Company’s Services segment offers tower-related services in the United States, including AZP, structural analysis and construction management, which primarily support its site leasing business, including the addition of new tenants and equipment on its communications sites. The Services segment is a strategic business unit that offers different services from, and requires different resources, skill sets and marketing strategies than, the property operating segments.

The accounting policies applied in compiling segment information below are similar to those described in note 1 to the Company’s consolidated financial statements included in the 2022 Form 10-K and as updated in note 1 above. Among other factors, in evaluating financial performance in each business segment, management uses segment gross margin and segment operating profit. The Company defines segment gross margin as segment revenue less segment operating expenses excluding Depreciation, amortization and accretion; Selling, general, administrative and development expense; and Other operating expenses. The Company defines segment operating profit as segment gross margin less Selling, general, administrative and development expense attributable to the segment, excluding stock-based compensation expense and corporate expenses. These measures of segment gross margin and segment operating profit are also before Interest income, Interest expense, Gain (loss) on retirement of long-term obligations, Other income (expense), Net income (loss) attributable to noncontrolling interests and Income tax benefit (provision). The categories of expenses

indicated above, such as depreciation, have been excluded from segment operating performance as they are not considered in the review of information or the evaluation of results by management. There are no significant revenues resulting from transactions between the Company’s operating segments. All intercompany transactions are eliminated to reconcile segment results and assets to the consolidated statements of operations and consolidated balance sheets.

Summarized financial information concerning the Company’s reportable segments for the three months ended March 31, 2023 and 2022 is shown in the following tables. The “Other” column (i) represents amounts excluded from specific segments, such as business development operations, stock-based compensation expense and corporate expenses included in Selling, general, administrative and development expense; Other operating expenses; Interest income; Interest expense; Gain (loss) on retirement of long-term obligations; and Other income (expense), and (ii) reconciles segment operating profit to Income from continuing operations before income taxes.

	Property												Total  Property		Services		Other		Total
Three Months Ended March 31, 2023	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,287.6	$	251.1	$	317.0	$	191.7	$	464.1	$	203.0	$	2,714.5	$	52.7			$	2,767.2
Segment operating expenses	205.3		168.4		118.5		73.1		137.9		83.8		787.0		19.1				806.1
Segment gross margin	1,082.3		82.7		198.5		118.6		326.2		119.2		1,927.5		33.6				1,961.1
Segment selling, general, administrative and development expense (1)	40.8		8.8		21.4		14.6		29.7		17.5		132.8		5.7				138.5
Segment operating profit	$	1,041.5	$	73.9	$	177.1	$	104.0	$	296.5	$	101.7	$	1,794.7	$	27.9			$	1,822.6
Stock-based compensation expense																	$	65.5	65.5
Other selling, general, administrative and development expense																	59.9		59.9
Depreciation, amortization and accretion																	794.1		794.1
Other expense (2)																	534.7		534.7
Income from continuing operations before income taxes																			$	368.4
Total assets	$	26,657.4	$	3,879.7	$	4,632.4	$	11,609.5	$	8,741.0	$	10,632.5	$	66,152.5	$	125.2	$	540.0	$	66,817.7

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $65.5 million.

(2)Primarily includes interest expense and losses from foreign currency exchange rate fluctuations. Three months ended March 31, 2023 also includes a loss on the sale of Mexico Fiber of $80.0 million and $29.8 million in impairment charges.

	Property												Total  Property		Services		Other		Total
Three Months Ended March 31, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,232.4	$	298.5	$	267.8	$	198.5	$	419.3	$	184.3	$	2,600.8	$	59.5			$	2,660.3
Segment operating expenses	199.8		175.1		97.7		92.3		130.0		76.6		771.5		27.9				799.4
Segment gross margin	1,032.6		123.4		170.1		106.2		289.3		107.7		1,829.3		31.6				1,860.9
Segment selling, general, administrative and development expense (1)	42.8		47.9		22.5		14.9		28.8		16.4		173.3		6.0				179.3
Segment operating profit	$	989.8	$	75.5	$	147.6	$	91.3	$	260.5	$	91.3	$	1,656.0	$	25.6			$	1,681.6
Stock-based compensation expense																	$	56.7	56.7
Other selling, general, administrative and development expense																	57.9		57.9
Depreciation, amortization and accretion																	815.8		815.8
Other expense (2)																	26.0		26.0
Income from continuing operations before income taxes																			$	725.2
Total assets	$	27,247.9	$	5,102.1	$	4,894.0	$	11,741.3	$	9,136.0	$	10,996.2	$	69,117.5	$	86.3	$	559.7	$	69,763.5

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $56.7 million.

(2)Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations.

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)

3 Months Ended

Mar. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Principles of Consolidation and Basis of Presentation

Principles of Consolidation and Basis of Presentation—The accompanying consolidated and condensed consolidated financial statements include the accounts of the Company and those entities in which it has a controlling interest. Investments in entities that the Company does not control are accounted for using the equity method or as investments in equity securities, depending upon the Company’s ability to exercise significant influence over operating and financial policies. All intercompany accounts and transactions have been eliminated.

Reportable Segments

Reportable Segments—The Company reports its results in seven segments – U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property, Data Centers and Services, which are discussed further in note 15.

Revenue

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

Non-lease property revenue—Non-lease property revenue consists primarily of revenue generated from DAS networks, fiber and other property related revenue. DAS networks and fiber arrangements generally require that the Company provide the tenant the right to use available capacity on the applicable communications infrastructure. Performance obligations are satisfied over time for the duration of the arrangements. Non-lease property revenue also includes revenue generated from interconnection offerings in the Company’s data center facilities. Interconnection offerings are generally contracted on a month-to-month basis and are cancellable by the Company or the data center customer at any time. Performance obligations are satisfied over time for the duration of the arrangements. Other property related revenue streams, which include site inspections, are not material on either an individual or consolidated basis. There were no material changes in the receivables, contract assets and contract liabilities from contracts with customers for the three months ended March 31, 2023.

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

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Cash, Cash Equivalents, and Restricted Cash

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

	Three Months Ended March 31,
	2023		2022
Cash and cash equivalents	$	1,803.0	$	1,941.5
Restricted cash	122.4		329.9
Total cash, cash equivalents and restricted cash	$	1,925.4	$	2,271.4

Schedule of Revenue Disaggregated by Source and Geography

A summary of revenue disaggregated by source and geography is as follows:

Three Months Ended March 31, 2023	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	71.0	$	2.3	$	6.7	$	3.4	$	41.3	$	28.3	$	153.0
Services revenue	52.7		—		—		—		—		—		52.7
Total non-lease revenue	$	123.7	$	2.3	$	6.7	$	3.4	$	41.3	$	28.3	$	205.7
Property lease revenue	1,216.6		248.8		310.3		188.3		422.8		174.7		2,561.5
Total revenue	$	1,340.3	$	251.1	$	317.0	$	191.7	$	464.1	$	203.0	$	2,767.2

Three Months Ended March 31, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers		Total
Non-lease property revenue	$	74.2	$	3.0	$	7.1	$	2.4	$	37.3	$	25.8	$	149.8
Services revenue	59.5		—		—		—		—		—		59.5
Total non-lease revenue	$	133.7	$	3.0	$	7.1	$	2.4	$	37.3	$	25.8	$	209.3
Property lease revenue	1,158.2		295.5		260.7		196.1		382.0		158.5		2,451.0
Total revenue	$	1,291.9	$	298.5	$	267.8	$	198.5	$	419.3	$	184.3	$	2,660.3

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PREPAID AND OTHER CURRENT ASSETS (Tables)

3 Months Ended

Mar. 31, 2023

Prepaid Expense and Other Assets, Current [Abstract]

Schedule of Prepaid and Other Current Assets

Prepaid and other current assets consisted of the following:

	As of
	March 31, 2023		December 31, 2022
Prepaid assets	$	95.3	$	100.7
Prepaid income tax	153.0		139.3
Unbilled receivables	308.5		283.8
Value added tax and other consumption tax receivables	58.2		83.6
Other miscellaneous current assets (1)	204.3		115.9
Prepaid and other current assets	$	819.3	$	723.3

_______________

(1)Includes short-term portion of the VIL OCDs (as defined and further discussed in note 7).

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LEASES (Tables)

3 Months Ended

Mar. 31, 2023

Leases [Abstract]

Schedule of Future Minimum Rental Receipts Expected Under Operating Leases

Future minimum rental receipts expected under non-cancellable operating lease agreements as of March 31, 2023 were as follows:

Fiscal Year	Amount (1) (2)
Remainder of 2023	$	5,937.0
2024	7,616.7
2025	7,157.0
2026	6,667.0
2027	6,521.2
Thereafter	28,680.8
Total	$	62,579.7

_______________

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

(2)Balances represent contractual amounts owned with no adjustments made for expected collectibility.

Schedule of Information About Other Lease-related Balances

Information about other lease-related balances is as follows:

	As of
	March 31, 2023		December 31, 2022
Operating leases:
Right-of-use asset	$	8,952.4	$	8,918.9
Current portion of lease liability	$	790.1	$	788.9
Lease liability	7,576.9		7,591.9
Total operating lease liability	$	8,367.0	$	8,380.8

Schedule of Components of Operating Lease Cost

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

	As of
	March 31, 2023		December 31, 2022
Operating leases:
Weighted-average remaining lease term (years)	12.1		12.2
Weighted-average incremental borrowing rate	5.5	%	5.3	%

The following table sets forth the components of lease cost:

	Three Months Ended March 31,
	2023		2022
Operating lease cost	$	306.7	$	306.5
Variable lease costs not included in lease liability (1)	109.1		101.4

______________

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

Supplemental cash flow information is as follows:

	Three Months Ended March 31,
	2023		2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	(342.6)	$	(336.3)
Non-cash items:
New operating leases (1)	$	56.5	$	58.6
Operating lease modifications and reassessments (2)	$	102.9	$	(11.2)

______________

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

(2)For the three months ended March 31, 2022, includes a reduction of the operating lease liability due to purchase accounting measurement period adjustments.

Schedule of Maturity of Operating Lease Liabilities

Maturities of operating lease liabilities as of March 31, 2023 were as follows:

Fiscal Year	Operating Lease (1)
Remainder of 2023	$	892.1
2024	1,096.6
2025	1,036.4
2026	976.4
2027	912.6
Thereafter	6,515.1
Total lease payments	11,429.2
Less amounts representing interest	(3,062.2)
Total lease liability	8,367.0
Less current portion of lease liability	790.1
Non-current lease liability	$	7,576.9

_______________

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

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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

3 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in the Carrying Value of Goodwill

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

	Property												Services		Total
	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Balance as of January 1, 2023	$	4,637.5	$	889.2	$	548.5	$	3,044.0	$	915.5	$	2,920.0	$	2.0	$	12,956.7
Other (1)	—		—		—		—		(20.7)		—		—		(20.7)
Effect of foreign currency translation	0.1		5.8		(18.7)		37.9		36.1		—		—		61.2
Balance as of March 31, 2023	$	4,637.6	$	895.0	$	529.8	$	3,081.9	$	930.9	$	2,920.0	$	2.0	$	12,997.2

_______________

(1)Other represents the goodwill associated with Mexico Fiber, which was sold during the three months ended March 31, 2023.

Schedule of Other Intangible Assets Subject to Amortization

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

		As of March 31, 2023						As of December 31, 2022
	Estimated Useful Lives (years)	Gross Carrying Value		Accumulated Amortization		Net Book Value		Gross Carrying Value		Accumulated Amortization		Net Book Value
Acquired network location intangibles (1)	Up to 20	$	6,076.0	$	(2,612.9)	$	3,463.1	$	6,058.2	$	(2,537.9)	$	3,520.3
Acquired tenant-related intangibles	Up to 20	18,979.2		(6,088.4)		12,890.8		18,941.2		(5,827.7)		13,113.5
Acquired licenses and other intangibles	2-20	1,772.3		(489.1)		1,283.2		1,772.9		(423.4)		1,349.5
Total other intangible assets		$	26,827.5	$	(9,190.4)	$	17,637.1	$	26,772.3	$	(8,789.0)	$	17,983.3

_______________

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

Schedule of Expected Future Amortization Expenses

Based on current exchange rates, the Company expects to record amortization expense as follows over the remaining current year and the five subsequent years:

Fiscal Year	Amount
Remainder of 2023	$	1,061.2
2024	1,344.0
2025	1,292.5
2026	1,240.5
2027	1,226.1
2028	1,219.5

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ACCRUED EXPENSES (Tables)

3 Months Ended

Mar. 31, 2023

Accrued Liabilities, Current [Abstract]

Schedule of Accrued Expenses

Accrued expenses consisted of the following:

	As of
	March 31, 2023		December 31, 2022
Accrued construction costs	$	151.8	$	230.8
Accrued income tax payable	30.7		29.8
Accrued pass-through costs	81.5		85.1
Amounts payable for acquisitions	11.5		55.2
Amounts payable to tenants	101.5		95.2
Accrued property and real estate taxes	275.3		270.1
Accrued rent	78.7		77.3
Payroll and related withholdings	88.5		140.4
Other accrued expenses	352.1		360.3
Total accrued expenses	$	1,171.6	$	1,344.2

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LONG-TERM OBLIGATIONS (Tables)

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums, debt issuance costs and fair value adjustments due to interest rate swaps consisted of the following:

	As of
	March 31, 2023		December 31, 2022		Maturity Date
2021 Multicurrency Credit Facility (1) (2)	$	2,882.7	$	3,788.7	June 30, 2025
2021 Term Loan (1)	996.5		996.3		January 31, 2027
2021 Credit Facility (1)	1,165.0		1,080.0		January 31, 2027
2021 EUR Three Year Delayed Draw Term Loan (1) (2)	894.0		882.9		May 28, 2024
2021 USD Two Year Delayed Draw Term Loan (1)	1,499.5		1,499.3		December 28, 2023
3.50% senior notes (3)	—		999.8		January 31, 2023
3.000% senior notes	697.9		694.5		June 15, 2023
0.600% senior notes	499.2		498.9		January 15, 2024
5.00% senior notes	1,000.2		1,000.5		February 15, 2024
3.375% senior notes	648.7		648.3		May 15, 2024
2.950% senior notes	646.9		646.4		January 15, 2025
2.400% senior notes	747.6		747.3		March 15, 2025
1.375% senior notes (4)	539.1		532.1		April 4, 2025

4.000% senior notes	747.1		746.8		June 1, 2025
1.300% senior notes	497.6		497.3		September 15, 2025
4.400% senior notes	498.3		498.1		February 15, 2026
1.600% senior notes	696.6		696.3		April 15, 2026
1.950% senior notes (4)	538.9		532.1		May 22, 2026
1.450% senior notes	594.8		594.5		September 15, 2026
3.375% senior notes	993.4		992.9		October 15, 2026
3.125% senior notes	398.7		398.6		January 15, 2027
2.750% senior notes	746.3		746.1		January 15, 2027
0.450% senior notes (4)	808.5		798.2		January 15, 2027
0.400% senior notes (4)	537.3		530.4		February 15, 2027
3.650% senior notes	643.7		643.3		March 15, 2027
3.55% senior notes	746.5		746.3		July 15, 2027
3.600% senior notes	695.4		695.1		January 15, 2028
0.500% senior notes (4)	806.8		796.6		January 15, 2028
1.500% senior notes	646.6		646.5		January 31, 2028
5.500% senior notes	692.6		—		March 15, 2028
3.950% senior notes	592.9		592.6		March 15, 2029
0.875% senior notes (4)	808.0		797.8		May 21, 2029
3.800% senior notes	1,637.3		1,636.8		August 15, 2029
2.900% senior notes	743.6		743.4		January 15, 2030
2.100% senior notes	742.4		742.2		June 15, 2030
0.950% senior notes (4)	535.3		528.5		October 5, 2030
1.875% senior notes	792.7		792.5		October 15, 2030
2.700% senior notes	694.6		694.4		April 15, 2031
2.300% senior notes	692.1		691.9		September 15, 2031
1.000% senior notes (4)	697.9		689.1		January 15, 2032
4.050% senior notes	642.4		642.2		March 15, 2032
5.650% senior notes	789.9		—		March 15, 2033
1.250% senior notes (4)	535.2		528.5		May 21, 2033
3.700% senior notes	592.3		592.2		October 15, 2049
3.100% senior notes	1,038.3		1,038.3		June 15, 2050
2.950% senior notes	1,022.7		1,022.5		January 15, 2051
Total American Tower Corporation debt	36,064.0		36,307.0
Series 2013-2A securities (5)	—		1,299.7		N/A
Series 2018-1A securities (6)	496.3		496.1		March 15, 2028
Series 2023-1A securities (7)	1,281.6		—		March 15, 2028
Series 2015-2 notes (8)	523.6		523.4		June 16, 2025
Other subsidiary debt (9)	155.5		16.2		Various
Total American Tower subsidiary debt	2,457.0		2,335.4
Finance lease obligations	21.0		27.8
Total	38,542.0		38,670.2
Less current portion of long-term obligations	(3,856.4)		(4,514.2)
Long-term obligations	$	34,685.6	$	34,156.0

_______________

(1)Accrues interest at a variable rate.

(2)Reflects borrowings denominated in Euro (“EUR”) and, for the 2021 Multicurrency Credit Facility (as defined below), reflects borrowings denominated in both EUR and U.S. Dollars (“USD”).

(3)Repaid in full on January 31, 2023 using borrowings under the 2021 Credit Facility (as defined below).

(4)Notes are denominated in EUR.

(5)Repaid in full on the March 2023 repayment date using proceeds from the 2023 Securitization (as defined below).

(6)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2048.

(7)Maturity date reflects the anticipated repayment date; final legal maturity is March 15, 2053.

(8)Maturity date reflects the anticipated repayment date; final legal maturity is June 15, 2050.

(9)Includes amounts drawn under letters of credit in Nigeria, which are denominated in USD, and the India Term Loan (as defined below), which is denominated in Indian Rupee (“INR”).

The key terms of the Notes are as follows:

Senior Notes	Aggregate Principal Amount (in millions)		Issue Date and Interest Accrual Date	Maturity Date	Contractual Interest Rate	First Interest Payment	Interest Payments Due (1)	Par Call Date (2)
5.500% Notes	$	700.0	March 3, 2023	March 15, 2028	5.500%	September 15, 2023	March 15 and September 15	February 15, 2028
5.650% Notes	$	800.0	March 3, 2023	March 15, 2033	5.650%	September 15, 2023	March 15 and September 15	December 15, 2032

___________

(1)Accrued and unpaid interest on USD denominated notes is payable in USD semi-annually in arrears and will be computed from the issue date on the basis of a 360-day year comprised of twelve 30-day months.

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

Schedule of Maturities of Long-term Debt

As of March 31, 2023, the key terms under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the Company’s $1.0 billion unsecured term loan, as amended and restated in December 2021 (the “2021 Term Loan”), the Company’s 825.0 million EUR unsecured term loan, as amended and restated in December 2021 (the “2021 EUR Three Year Delayed Draw Term Loan”) and the Company’s $1.5 billion unsecured term loan entered into in December 2021 (the “2021 USD Two Year Delayed Draw Term Loan”) were as follows:

	Outstanding Principal Balance (in millions)		Undrawn letters of credit (in millions)		Maturity Date		Current margin over LIBOR or EURIBOR (1)		Current commitment fee (2)
2021 Multicurrency Credit Facility	$	2,882.7	$	3.5	June 30, 2025	(3)	1.125	%	0.110	%
2021 Credit Facility	1,165.0		30.5		January 31, 2027	(3)	1.125	%	0.110	%
2021 Term Loan	1,000.0		N/A		January 31, 2027		1.125	%	N/A
2021 EUR Three Year Delayed Draw Term Loan	894.2		N/A		May 28, 2024		1.125	%	N/A
2021 USD Two Year Delayed Draw Term Loan	1,500.0		N/A		December 28, 2023		1.125	%	N/A

_______________

(1)London Interbank Offered Rate (“LIBOR”) applies to the USD denominated borrowings under the 2021 Multicurrency Credit Facility, the 2021 Credit Facility, the 2021 Term Loan and the 2021 USD Two Year Delayed Draw Term Loan. Euro Interbank Offer Rate (“EURIBOR”) applies to the EUR denominated borrowings under the 2021 Multicurrency Credit Facility and all of the borrowings under the 2021 EUR Three Year Delayed Draw Term Loan.

(2)Fee on undrawn portion of each credit facility.

(3)Subject to two optional renewal periods.

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FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of Fair Value Level of Inputs

Below are the three levels of inputs that may be used to measure fair value:

Level 1	Quoted prices in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.
Level 2	Observable inputs other than Level 1 prices, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3	Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis

The fair values of the Company’s financial assets and liabilities that are required to be measured on a recurring basis at fair value were as follows:

	March 31, 2023					December 31, 2022
	Fair Value Measurements Using					Fair Value Measurements Using
	Level 1		Level 2		Level 3	Level 1		Level 2		Level 3
Assets:
Investments in equity securities (1)	$	30.4	—		—	$	29.2	—		—
VIL OCDs	—		$	101.6	—	—		—		—
Liabilities:
Interest rate swap agreements	—		$	3.1	—	—		$	6.2	—
Fair value of debt related to interest rate swap agreements (2)	$	(1.8)	—		—	$	(4.9)	—		—

_______________

(1)Investments in equity securities are recorded in Notes receivable and other non-current assets in the consolidated balance sheet at fair value. Unrealized holding gains and losses for equity securities are recorded in Other income (expense) in the consolidated statements of operations in the current period. During the three months ended March 31, 2023 and 2022, the Company recognized unrealized gains of $1.2 million and $9.5 million for equity securities held as of March 31, 2023.

(2)Included in the carrying values of the corresponding debt obligations.

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INCOME TAXES (Tables)

3 Months Ended

Mar. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Penalties and Income Tax-Related Interest Expense

The Company recorded the following penalties and income tax-related interest expense during the three months ended March 31, 2023 and 2022:

	Three Months Ended March 31,
	2023		2022
Penalties and income tax-related interest expense	$	2.8	$	7.3

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STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Schedule of Stock-Based Compensation Expenses

During the three months ended March 31, 2023 and 2022, the Company recorded the following stock-based compensation expense in selling, general, administrative and development expense:

	Three Months Ended March 31,
	2023		2022
Stock-based compensation expense	$	65.5	$	56.7

Schedule of Option Activity

The Company’s option activity for the three months ended March 31, 2023 was as follows (shares disclosed in full amounts):

	Number of Options
Outstanding as of January 1, 2023	855,154
Exercised	(21,526)
Forfeited	—
Expired	—
Outstanding as of March 31, 2023	833,628

Schedule of RSU and PSU Activity

The Company’s RSU and PSU activity for the three months ended March 31, 2023 was as follows (shares disclosed in full amounts): 

	RSUs	PSUs
Outstanding as of January 1, 2023 (1)	1,382,879	276,468
Granted (2)	945,029	118,684
Vested and Released (3)	(511,200)	(46,850)
Forfeited	(23,247)	—
Outstanding as of March 31, 2023	1,793,461	348,302
Vested and deferred as of March 31, 2023 (4)	—	12,677

_______________

(1)PSUs consist of the target number of shares issuable at the end of the three-year performance period for the outstanding 2022 PSUs and the outstanding 2021 PSUs, or 98,542 shares and 98,694 shares, respectively, and the shares issuable at the end of the three-year performance period for the PSUs granted in 2020 (the “2020 PSUs”) based on achievement against the performance metrics for the three-year performance period, or 79,232 shares.

(2)PSUs consist of the target number of shares issuable at the end of the three-year performance period for the 2023 PSUs, or 118,684 shares.

(3)PSUs consist of shares vested pursuant to the 2020 PSUs. There are no additional shares to be earned related to the 2020 PSUs. As of March 31, 2023, 19,705 earned shares remain outstanding and will vest in May 2023.

(4)Vested and deferred PSUs are related to deferred compensation for certain former employees.

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EQUITY (Tables)

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Schedule of Cash Distributions

During the three months ended March 31, 2023, the Company declared or paid the following cash distributions (per share data reflects actual amounts):

Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (1)
Common Stock
March 8, 2023	April 28, 2023	April 14, 2023	$	1.56	$	727.0
December 7, 2022	February 2, 2023	December 28, 2022	$	1.56	$	726.3

_______________

(1)Does not include amounts accrued for distributions payable related to unvested restricted stock units.

During the three months ended March 31, 2022, the Company declared or paid the following cash distributions (per share data reflects actual amounts):

Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (1)
Common Stock
March 10, 2022	April 29, 2022	April 13, 2022	$	1.40	$	638.8
December 15, 2021	January 14, 2022	December 27, 2021	$	1.39	$	633.5

_______________

(1)Does not include amounts accrued for distributions payable related to unvested restricted stock units.

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NONCONTROLLING INTERESTS (Tables)

3 Months Ended

Mar. 31, 2023

Noncontrolling Interest [Abstract]

Schedule of Changes in Noncontrolling Interests

The changes in noncontrolling interests were as follows:

	Three Months Ended March 31,
	2023		2022
Balance as of January 1,	$	6,836.1	$	3,988.4
Net loss attributable to noncontrolling interests	(20.8)		(9.0)
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	39.9		(91.5)
Distributions to noncontrolling interest holders (1)	(11.5)		(0.2)
Balance as of March 31,	$	6,843.7	$	3,887.7

_______________

(1)For the three months ended March 31, 2023, primarily includes $11.4 million of Stonepeak Preferred Distributions.

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EARNINGS PER COMMON SHARE (Tables)

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

Schedule of Earnings Per Basic and Diluted by Common Class

The following table sets forth basic and diluted net income per common share computational data (shares in thousands, except per share data):

	Three Months Ended March 31,
	2023		2022
Net income attributable to American Tower Corporation common stockholders	$	335.8	$	711.7
Basic weighted average common shares outstanding	465,741		455,946
Dilutive securities	1,069		1,265
Diluted weighted average common shares outstanding	466,810		457,211
Basic net income attributable to American Tower Corporation common stockholders per common share	$	0.72	$	1.56
Diluted net income attributable to American Tower Corporation common stockholders per common share	$	0.72	$	1.56

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following shares were not included in the computation of diluted earnings per share because the effect would be anti-dilutive (in thousands, on a weighted average basis):

	Three Months Ended March 31,
	2023	2022
Restricted stock units	5	106

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ACQUISITIONS (Tables)

3 Months Ended

Mar. 31, 2023

Business Combination and Asset Acquisition [Abstract]

Schedule of Merger and Acquisition Related Costs

During the three months ended March 31, 2023 and 2022, the Company recorded acquisition and merger related expenses for business combinations and non-capitalized asset acquisition costs and integration costs as follows:

	Three Months Ended March 31,
	2023		2022
Acquisition and merger related expenses	$	5.0	$	5.7
Integration costs	$	2.6	$	10.0

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed

The following table summarizes the allocations of the purchase prices for the fiscal year 2023 acquisitions based upon their estimated fair value at the date of acquisition:

	Other
Current assets	$	1.5
Property and equipment	7.5
Intangible assets (1):
Tenant-related intangible assets	8.0
Network location intangible assets	0.8
Other non-current assets	0.8
Current liabilities	(0.2)
Other non-current liabilities	(0.9)
Net assets acquired	17.5
Fair value of net assets acquired	17.5
Purchase price	$	17.5

_______________

(1)Tenant-related intangible assets and network location intangible assets are amortized on a straight-line basis over the estimated useful lives of the assets.

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BUSINESS SEGMENTS (Tables)

3 Months Ended

Mar. 31, 2023

Segment Reporting [Abstract]

Schedule of Summarized Financial Information Concerning the Company's Reportable Segments

Summarized financial information concerning the Company’s reportable segments for the three months ended March 31, 2023 and 2022 is shown in the following tables. The “Other” column (i) represents amounts excluded from specific segments, such as business development operations, stock-based compensation expense and corporate expenses included in Selling, general, administrative and development expense; Other operating expenses; Interest income; Interest expense; Gain (loss) on retirement of long-term obligations; and Other income (expense), and (ii) reconciles segment operating profit to Income from continuing operations before income taxes.

	Property												Total  Property		Services		Other		Total
Three Months Ended March 31, 2023	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,287.6	$	251.1	$	317.0	$	191.7	$	464.1	$	203.0	$	2,714.5	$	52.7			$	2,767.2
Segment operating expenses	205.3		168.4		118.5		73.1		137.9		83.8		787.0		19.1				806.1
Segment gross margin	1,082.3		82.7		198.5		118.6		326.2		119.2		1,927.5		33.6				1,961.1
Segment selling, general, administrative and development expense (1)	40.8		8.8		21.4		14.6		29.7		17.5		132.8		5.7				138.5
Segment operating profit	$	1,041.5	$	73.9	$	177.1	$	104.0	$	296.5	$	101.7	$	1,794.7	$	27.9			$	1,822.6
Stock-based compensation expense																	$	65.5	65.5
Other selling, general, administrative and development expense																	59.9		59.9
Depreciation, amortization and accretion																	794.1		794.1
Other expense (2)																	534.7		534.7
Income from continuing operations before income taxes																			$	368.4
Total assets	$	26,657.4	$	3,879.7	$	4,632.4	$	11,609.5	$	8,741.0	$	10,632.5	$	66,152.5	$	125.2	$	540.0	$	66,817.7

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $65.5 million.

(2)Primarily includes interest expense and losses from foreign currency exchange rate fluctuations. Three months ended March 31, 2023 also includes a loss on the sale of Mexico Fiber of $80.0 million and $29.8 million in impairment charges.

	Property												Total  Property		Services		Other		Total
Three Months Ended March 31, 2022	U.S. & Canada		Asia-Pacific		Africa		Europe		Latin America		Data Centers
Segment revenues	$	1,232.4	$	298.5	$	267.8	$	198.5	$	419.3	$	184.3	$	2,600.8	$	59.5			$	2,660.3
Segment operating expenses	199.8		175.1		97.7		92.3		130.0		76.6		771.5		27.9				799.4
Segment gross margin	1,032.6		123.4		170.1		106.2		289.3		107.7		1,829.3		31.6				1,860.9
Segment selling, general, administrative and development expense (1)	42.8		47.9		22.5		14.9		28.8		16.4		173.3		6.0				179.3
Segment operating profit	$	989.8	$	75.5	$	147.6	$	91.3	$	260.5	$	91.3	$	1,656.0	$	25.6			$	1,681.6
Stock-based compensation expense																	$	56.7	56.7
Other selling, general, administrative and development expense																	57.9		57.9
Depreciation, amortization and accretion																	815.8		815.8
Other expense (2)																	26.0		26.0
Income from continuing operations before income taxes																			$	725.2
Total assets	$	27,247.9	$	5,102.1	$	4,894.0	$	11,741.3	$	9,136.0	$	10,996.2	$	69,117.5	$	86.3	$	559.7	$	69,763.5

_______________

(1)Segment selling, general, administrative and development expenses exclude stock-based compensation expense of $56.7 million.

(2)Primarily includes interest expense, partially offset by gains from foreign currency exchange rate fluctuations.

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions		3 Months Ended
	Mar. 29, 2023 USD ($)	Mar. 31, 2023 USD ($) reportableSegment	Mar. 31, 2022 USD ($)
Concentration Risk [Line Items]
Number of reportable segments | reportableSegment		7
Straight-line revenue		$ 112.0	$ 109.4
Indian Customer
Concentration Risk [Line Items]
Deferred recognition of revenue		$ 33.0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Mexico Fiber
Concentration Risk [Line Items]
Total consideration	$ 252.5
Loss on sale	80.0
Goodwill	$ 20.7
Common stock | Data Centers | U.S.
Concentration Risk [Line Items]
Controlling ownership interest percentage		0.72
ATC Europe
Concentration Risk [Line Items]
Ownership percentage		52.00%
Joint Venture - Bangladesh Operations
Concentration Risk [Line Items]
Ownership percentage		51.00%
Stonepeak | Common stock | Data Centers | U.S.
Concentration Risk [Line Items]
Ownership percentage by noncontrolling owners		28.00%
Stonepeak | Preferred stock | Data Centers | U.S.
Concentration Risk [Line Items]
Ownership percentage by noncontrolling owners		100.00%
Germany
Concentration Risk [Line Items]
Ownership percentage by noncontrolling owners		13.00%
Germany | ATC Europe
Concentration Risk [Line Items]
Ownership percentage		87.00%
Spain
Concentration Risk [Line Items]
Ownership percentage by noncontrolling owners		17.00%
Spain | ATC Europe
Concentration Risk [Line Items]
Ownership percentage		83.00%

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Cash, Cash Equivalents, And Restricted Cash (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 1,803.0	$ 2,028.4	$ 1,941.5
Restricted cash	122.4	112.3	329.9
Total cash, cash equivalents and restricted cash	$ 1,925.4	$ 2,140.7	$ 2,271.4	$ 2,343.3

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Total non-lease revenue	$ 205.7	$ 209.3
Property lease revenue	2,561.5	2,451.0
Total revenue	2,767.2	2,660.3
U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	123.7	133.7
Property lease revenue	1,216.6	1,158.2
Total revenue	1,340.3	1,291.9
Asia-Pacific
Disaggregation of Revenue [Line Items]
Total non-lease revenue	2.3	3.0
Property lease revenue	248.8	295.5
Total revenue	251.1	298.5
Africa
Disaggregation of Revenue [Line Items]
Total non-lease revenue	6.7	7.1
Property lease revenue	310.3	260.7
Total revenue	317.0	267.8
Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	3.4	2.4
Property lease revenue	188.3	196.1
Total revenue	191.7	198.5
Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	41.3	37.3
Property lease revenue	422.8	382.0
Total revenue	464.1	419.3
Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	28.3	25.8
Property lease revenue	174.7	158.5
Total revenue	203.0	184.3
Non-lease property revenue
Disaggregation of Revenue [Line Items]
Total non-lease revenue	153.0	149.8
Non-lease property revenue | U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	71.0	74.2
Non-lease property revenue | Asia-Pacific
Disaggregation of Revenue [Line Items]
Total non-lease revenue	2.3	3.0
Non-lease property revenue | Africa
Disaggregation of Revenue [Line Items]
Total non-lease revenue	6.7	7.1
Non-lease property revenue | Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	3.4	2.4
Non-lease property revenue | Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	41.3	37.3
Non-lease property revenue | Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	28.3	25.8
Services revenue
Disaggregation of Revenue [Line Items]
Total non-lease revenue	52.7	59.5
Services revenue | U.S. & Canada
Disaggregation of Revenue [Line Items]
Total non-lease revenue	52.7	59.5
Services revenue | Asia-Pacific
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0.0	0.0
Services revenue | Africa
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0.0	0.0
Services revenue | Europe
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0.0	0.0
Services revenue | Latin America
Disaggregation of Revenue [Line Items]
Total non-lease revenue	0.0	0.0
Services revenue | Data Centers
Disaggregation of Revenue [Line Items]
Total non-lease revenue	$ 0.0	$ 0.0

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PREPAID AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid assets	$ 95.3	$ 100.7
Prepaid income tax	153.0	139.3
Unbilled receivables	308.5	283.8
Value added tax and other consumption tax receivables	58.2	83.6
Other miscellaneous current assets	204.3	115.9
Prepaid and other current assets	$ 819.3	$ 723.3

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LEASES - Future Minimum Rental Receipts Expected Under Operating Leases (Details) $ in Millions	Mar. 31, 2023 USD ($)
Leases [Abstract]
Remainder of 2023	$ 5,937.0
2024	7,616.7
2025	7,157.0
2026	6,667.0
2027	6,521.2
Thereafter	28,680.8
Total	$ 62,579.7

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LEASES - Information About Other Lease-related Balances (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Operating leases:
Right-of-use asset	$ 8,952.4	$ 8,918.9
Current portion of lease liability	790.1	788.9
Lease liability	7,576.9	7,591.9
Total lease liability	$ 8,367.0	$ 8,380.8

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LEASES - Schedule of Weighted Average Lease Terms and Discount Rates (Details)	Mar. 31, 2023	Dec. 31, 2022
Operating leases:
Weighted-average remaining lease term (years)	12 years 1 month 6 days	12 years 2 months 12 days
Weighted-average incremental borrowing rate	5.50%	5.30%

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LEASES - Lease Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Leases [Abstract]
Operating lease cost	$ 306.7	$ 306.5
Variable lease costs not included in lease liability	$ 109.1	$ 101.4

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LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ (342.6)	$ (336.3)
Non-cash items:
New operating leases	56.5	58.6
Operating lease modifications and reassessments	$ 102.9	$ (11.2)

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LEASES - Maturities of Operating Leases (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Remainder of 2023	$ 892.1
2024	1,096.6
2025	1,036.4
2026	976.4
2027	912.6
Thereafter	6,515.1
Total lease payments	11,429.2
Less amounts representing interest	(3,062.2)
Total lease liability	8,367.0	$ 8,380.8
Less current portion of lease liability	790.1	788.9
Non-current lease liability	$ 7,576.9	$ 7,591.9

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GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in the Carrying Value of Goodwill (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 12,956.7
Other	(20.7)
Effect of foreign currency translation	61.2
Goodwill, ending balance	12,997.2
U.S. & Canada
Goodwill [Roll Forward]
Goodwill, beginning balance	4,637.5
Other	0.0
Effect of foreign currency translation	0.1
Goodwill, ending balance	4,637.6
Asia-Pacific
Goodwill [Roll Forward]
Goodwill, beginning balance	889.2
Other	0.0
Effect of foreign currency translation	5.8
Goodwill, ending balance	895.0
Africa
Goodwill [Roll Forward]
Goodwill, beginning balance	548.5
Other	0.0
Effect of foreign currency translation	(18.7)
Goodwill, ending balance	529.8
Europe
Goodwill [Roll Forward]
Goodwill, beginning balance	3,044.0
Other	0.0
Effect of foreign currency translation	37.9
Goodwill, ending balance	3,081.9
Latin America
Goodwill [Roll Forward]
Goodwill, beginning balance	915.5
Other	(20.7)
Effect of foreign currency translation	36.1
Goodwill, ending balance	930.9
Data Centers
Goodwill [Roll Forward]
Goodwill, beginning balance	2,920.0
Other	0.0
Effect of foreign currency translation	0.0
Goodwill, ending balance	2,920.0
Services
Goodwill [Roll Forward]
Goodwill, beginning balance	2.0
Other	0.0
Effect of foreign currency translation	0.0
Goodwill, ending balance	$ 2.0

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GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 26,827.5	$ 26,772.3
Accumulated Amortization	(9,190.4)	(8,789.0)
Net Book Value	17,637.1	17,983.3
Acquired network location intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	6,076.0	6,058.2
Accumulated Amortization	(2,612.9)	(2,537.9)
Net Book Value	$ 3,463.1	3,520.3
Acquired network location intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives (years)	20 years
Acquired tenant-related intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 18,979.2	18,941.2
Accumulated Amortization	(6,088.4)	(5,827.7)
Net Book Value	$ 12,890.8	13,113.5
Acquired tenant-related intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives (years)	20 years
Acquired licenses and other intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 1,772.3	1,772.9
Accumulated Amortization	(489.1)	(423.4)
Net Book Value	$ 1,283.2	$ 1,349.5
Acquired licenses and other intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives (years)	2 years
Acquired licenses and other intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Lives (years)	20 years

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GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 369.5	$ 458.6
Weighted Average
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, remaining amortization period	15 years

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GOODWILL AND OTHER INTANGIBLE ASSETS - Expected Future Amortization Expenses (Details) $ in Millions	Mar. 31, 2023 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2023	$ 1,061.2
2024	1,344.0
2025	1,292.5
2026	1,240.5
2027	1,226.1
2028	$ 1,219.5

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ACCRUED EXPENSES (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Accrued Liabilities, Current [Abstract]
Accrued construction costs	$ 151.8	$ 230.8
Accrued income tax payable	30.7	29.8
Accrued pass-through costs	81.5	85.1
Amounts payable for acquisitions	11.5	55.2
Amounts payable to tenants	101.5	95.2
Accrued property and real estate taxes	275.3	270.1
Accrued rent	78.7	77.3
Payroll and related withholdings	88.5	140.4
Other accrued expenses	352.1	360.3
Total accrued expenses	$ 1,171.6	$ 1,344.2

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LONG-TERM OBLIGATIONS - Schedule of Long-Term Debt Obligations (Details) € in Millions, $ in Millions	Mar. 31, 2023 USD ($)	Mar. 31, 2023 EUR (€)	Mar. 03, 2023 USD ($)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Finance lease obligations	$ 21.0			$ 27.8
Total	38,542.0			38,670.2
Less current portion of long-term obligations	(3,856.4)			(4,514.2)
Long-term obligations	34,685.6			34,156.0
American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	36,064.0			36,307.0
American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	2,457.0			2,335.4
2021 Multicurrency Credit Facility | Line of credit | Revolving Credit Facility | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	2,882.7			3,788.7
2021 Term Loan | Unsecured debt | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	996.5			996.3
2021 Credit Facility | Line of credit | Revolving Credit Facility | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	1,165.0			1,080.0
2021 EUR Three Year Delayed Draw Term Loan | Unsecured debt | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	894.0	€ 825.0		882.9
2021 USD Two Year Delayed Draw Term Loan | Unsecured debt | American Tower Corporation
Debt Instrument [Line Items]
Long-term debt	$ 1,499.5			1,499.3
3.50% Senior Notes, Due 2023 | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.50%	3.50%
Long-term debt	$ 0.0			999.8
3.000% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.00%	3.00%
Long-term debt	$ 697.9			694.5
0.600% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.60%	0.60%
Long-term debt	$ 499.2			498.9
5.00% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	5.00%	5.00%
Long-term debt	$ 1,000.2			1,000.5
3.375% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.375%	3.375%
Long-term debt	$ 648.7			648.3
2.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.95%	2.95%
Long-term debt	$ 646.9			646.4
2.400% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.40%	2.40%
Long-term debt	$ 747.6			747.3
1.375% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.375%	1.375%
Long-term debt	$ 539.1			532.1
4.000% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	4.00%	4.00%
Long-term debt	$ 747.1			746.8
1.300% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.30%	1.30%
Long-term debt	$ 497.6			497.3
4.400% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	4.40%	4.40%
Long-term debt	$ 498.3			498.1
1.600% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.60%	1.60%
Long-term debt	$ 696.6			696.3
1.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.95%	1.95%
Long-term debt	$ 538.9			532.1
1.450% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.45%	1.45%
Long-term debt	$ 594.8			594.5
3.375% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.375%	3.375%
Long-term debt	$ 993.4			992.9
3.125% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.125%	3.125%
Long-term debt	$ 398.7			398.6
2.750% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.75%	2.75%
Long-term debt	$ 746.3			746.1
0.450% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.45%	0.45%
Long-term debt	$ 808.5			798.2
0.400% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.40%	0.40%
Long-term debt	$ 537.3			530.4
3.650% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.65%	3.65%
Long-term debt	$ 643.7			643.3
3.55% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.55%	3.55%
Long-term debt	$ 746.5			746.3
3.600% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.60%	3.60%
Long-term debt	$ 695.4			695.1
0.500% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.50%	0.50%
Long-term debt	$ 806.8			796.6
1.500% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.50%	1.50%
Long-term debt	$ 646.6			646.5
5.500% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	5.50%	5.50%	5.50%
Long-term debt	$ 692.6		$ 700.0	0.0
3.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.95%	3.95%
Long-term debt	$ 592.9			592.6
0.875% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.875%	0.875%
Long-term debt	$ 808.0			797.8
3.800% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.80%	3.80%
Long-term debt	$ 1,637.3			1,636.8
2.900% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.90%	2.90%
Long-term debt	$ 743.6			743.4
2.100% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.10%	2.10%
Long-term debt	$ 742.4			742.2
0.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	0.95%	0.95%
Long-term debt	$ 535.3			528.5
1.875% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.875%	1.875%
Long-term debt	$ 792.7			792.5
2.700% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.70%	2.70%
Long-term debt	$ 694.6			694.4
2.300% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.30%	2.30%
Long-term debt	$ 692.1			691.9
1.000% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.00%	1.00%
Long-term debt	$ 697.9			689.1
4.050% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	4.05%	4.05%
Long-term debt	$ 642.4			642.2
5.650% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	5.65%	5.65%	5.65%
Long-term debt	$ 789.9		$ 800.0	0.0
1.250% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	1.25%	1.25%
Long-term debt	$ 535.2			528.5
3.700% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.70%	3.70%
Long-term debt	$ 592.3			592.2
3.100% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	3.10%	3.10%
Long-term debt	$ 1,038.3			1,038.3
2.950% senior notes | Senior notes | American Tower Corporation
Debt Instrument [Line Items]
Debt interest rate	2.95%	2.95%
Long-term debt	$ 1,022.7			1,022.5
Series 2013-2A securities | Secured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	0.0			1,299.7
Series 2018-1A securities | Secured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	496.3			496.1
Series 2023-1A Securities | Secured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	1,281.6			0.0
Series 2015-2 notes | Secured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	523.6			523.4
Other subsidiary debt | Unsecured debt | American Tower subsidiary
Debt Instrument [Line Items]
Long-term debt	$ 155.5			$ 16.2

XML

LONG-TERM OBLIGATIONS - Current Portion of Long-Term Obligations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 3,856.4	$ 4,514.2
Unsecured debt | 2021 USD Two Year Delayed Draw Term Loan
Debt Instrument [Line Items]
Debt instrument term	2 years
American Tower Corporation | Unsecured debt | 2021 USD Two Year Delayed Draw Term Loan
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 1,500.0
Debt instrument term	2 years
American Tower Corporation | Senior notes | 3.000% senior notes
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 700.0
Debt interest rate	3.00%
American Tower Corporation | Senior notes | 0.600% senior notes
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 500.0
Debt interest rate	0.60%
American Tower Corporation | Senior notes | 5.00% senior notes
Debt Instrument [Line Items]
Current portion of long-term obligations	$ 1,000.0
Debt interest rate	5.00%

XML

LONG-TERM OBLIGATIONS - Repayment of Debt (Details)		1 Months Ended
	Mar. 13, 2023 USD ($) site	Mar. 31, 2023 USD ($)	Jan. 31, 2023 USD ($)
Debt Instrument [Line Items]
Number of trust sites assets | site	5,036
Secured debt | Secured Tower Revenue Securities, Series 2023-1R | Affiliated Entity
Debt Instrument [Line Items]
Debt face amount	$ 68,500,000
Debt interest rate	5.735%
Secured debt | Secured Tower Revenue Securities, 2023 Securities
Debt Instrument [Line Items]
Debt instrument term	5 years
Restricted cash and cash equivalents		$ 77,700,000
American Tower Trust I | Secured debt | Series 2023-1A Securities
Debt Instrument [Line Items]
Debt face amount	$ 1,300,000,000
Debt interest rate	5.49%
American Tower subsidiary | Secured debt | Secured Tower Revenue Securities, Series 2013-2A
Debt Instrument [Line Items]
Repayment of aggregate principal		$ 1,300,000,000
American Tower Corporation | 3.50% Senior Notes, Due 2023 | Senior notes
Debt Instrument [Line Items]
Debt face amount			$ 1,000,000,000
Debt interest rate			3.50%
Outstanding principal balance			$ 0

XML

LONG-TERM OBLIGATIONS - Offering of Senior Notes (Details) - USD ($) $ in Millions			3 Months Ended
	Mar. 03, 2023	Apr. 01, 2022	Mar. 31, 2023	Mar. 31, 2022
Debt Instrument [Line Items]
Proceeds from issuance of senior long-term debt			$ 1,494.2	$ 0.0
Senior notes
Debt Instrument [Line Items]
Redemption price percentage	101.00%	100.00%
American Tower Corporation | 5.500% senior notes | Senior notes
Debt Instrument [Line Items]
Debt interest rate	5.50%		5.50%
Debt face amount	$ 700.0
American Tower Corporation | 5.650% senior notes | Senior notes
Debt Instrument [Line Items]
Debt interest rate	5.65%		5.65%
Debt face amount	$ 800.0
American Tower Corporation | 5.500% Senior Notes Due 2028 And 5.650% Senior Notes Due 2033 | Senior notes
Debt Instrument [Line Items]
Proceeds from issuance of senior long-term debt	$ 1,480.9

XML

LONG-TERM OBLIGATIONS - Schedule of Key Terms of Notes (Details) - USD ($) $ in Millions	Mar. 03, 2023	Apr. 01, 2022	Mar. 31, 2023	Dec. 31, 2022
Senior notes
Debt Instrument [Line Items]
Redemption price percentage	101.00%	100.00%
American Tower Corporation
Debt Instrument [Line Items]
Long-term debt			$ 36,064.0	$ 36,307.0
American Tower Corporation | Senior notes | 5.500% senior notes
Debt Instrument [Line Items]
Debt interest rate	5.50%		5.50%
Long-term debt	$ 700.0		$ 692.6	0.0
American Tower Corporation | Senior notes | 5.650% senior notes
Debt Instrument [Line Items]
Debt interest rate	5.65%		5.65%
Long-term debt	$ 800.0		$ 789.9	$ 0.0

XML

LONG-TERM OBLIGATIONS - Bank Facilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Line of Credit Facility [Line Items]
Borrowings under credit facilities	$ 1,745.0	$ 2,250.0
Revolving Credit Facility | 2021 Multicurrency Credit Facility
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity	6,000.0
Revolving Credit Facility | 2021 Credit Facility
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity	$ 4,000.0
American Tower Corporation | 3.50% Senior Notes, Due 2023 | Senior notes
Line of Credit Facility [Line Items]
Contractual Interest Rate	3.50%
American Tower Corporation | Revolving Credit Facility | 2021 Multicurrency Credit Facility
Line of Credit Facility [Line Items]
Borrowings under credit facilities	$ 725.0
Repayment of indebtedness under credit facility	1,600.0
American Tower Corporation | Revolving Credit Facility | 2021 Credit Facility
Line of Credit Facility [Line Items]
Borrowings under credit facilities	1,000.0
Repayment of indebtedness under credit facility	$ 935.0

XML

LONG-TERM OBLIGATIONS - Schedule of Credit Facilities and Term Loans (Details) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) renewalPeriod	Mar. 31, 2023 EUR (€)	Dec. 31, 2022 USD ($)
2021 EUR Three Year Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Debt instrument term	3 years
2021 USD Two Year Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Debt instrument term	2 years
American Tower Corporation
Line of Credit Facility [Line Items]
Long-term debt	$ 36,064.0		$ 36,307.0
American Tower Corporation | Revolving Credit Facility
Line of Credit Facility [Line Items]
Number of optional renewal periods | renewalPeriod	2
American Tower Corporation | 2021 Multicurrency Credit Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Outstanding principal balance	$ 2,882.7
Undrawn letters of credit	$ 3.5
Current commitment fee, percentage	0.11%
American Tower Corporation | 2021 Multicurrency Credit Facility | Revolving Credit Facility | Current margin over LIBOR
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR	1.125%
American Tower Corporation | 2021 Credit Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Outstanding principal balance	$ 1,165.0
Undrawn letters of credit	$ 30.5
Current commitment fee, percentage	0.11%
American Tower Corporation | 2021 Credit Facility | Revolving Credit Facility | Current margin over LIBOR
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR	1.125%
American Tower Corporation | 2021 Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Long-term debt	$ 996.5		996.3
Outstanding principal balance	$ 1,000.0
American Tower Corporation | 2021 Term Loan | Unsecured debt | Current margin over LIBOR
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR	1.125%
American Tower Corporation | 2021 EUR Three Year Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Long-term debt	$ 894.0	€ 825.0	882.9
Outstanding principal balance	$ 894.2
American Tower Corporation | 2021 EUR Three Year Delayed Draw Term Loan | Unsecured debt | Current margin over LIBOR
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR	1.125%
American Tower Corporation | 2021 USD Two Year Delayed Draw Term Loan | Unsecured debt
Line of Credit Facility [Line Items]
Long-term debt	$ 1,499.5		$ 1,499.3
Debt instrument term	2 years
Outstanding principal balance	$ 1,500.0
American Tower Corporation | 2021 USD Two Year Delayed Draw Term Loan | Unsecured debt | Current margin over LIBOR
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR	1.125%

XML

LONG-TERM OBLIGATIONS - India Term Loan (Details) - India Term Loan - Unsecured debt $ in Millions	Feb. 17, 2023 USD ($)	Feb. 17, 2023 INR (₨)	Feb. 16, 2023 USD ($)	Feb. 16, 2023 INR (₨)
Line of Credit Facility [Line Items]
Debt face amount			$ 145.1	₨ 12,000,000,000
Proceeds from term loans	$ 120.7	₨ 10,000,000,000
India Treasury Rate
Line of Credit Facility [Line Items]
Current margin over LIBOR or EURIBOR			1.95%

XML

FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Liabilities:
Unrealized gains (losses) for equity securities	$ 1.2	$ 9.5
Fair Value, Measurements, Recurring | Level 1
Assets:
Investments in equity securities	30.4		$ 29.2
Fair Value, Measurements, Recurring | Level 1 | Interest Rate Swap
Liabilities:
Interest rate swap agreements	0.0		0.0
Fair value of debt related to interest rate swap agreements	(1.8)		(4.9)
Fair Value, Measurements, Recurring | Level 1 | Convertible Debt Securities
Assets:
VIL OCDs	0.0		0.0
Fair Value, Measurements, Recurring | Level 2
Assets:
Investments in equity securities	0.0		0.0
Fair Value, Measurements, Recurring | Level 2 | Interest Rate Swap
Liabilities:
Interest rate swap agreements	3.1		6.2
Fair value of debt related to interest rate swap agreements	0.0		0.0
Fair Value, Measurements, Recurring | Level 2 | Convertible Debt Securities
Assets:
VIL OCDs	101.6		0.0
Fair Value, Measurements, Recurring | Level 3
Assets:
Investments in equity securities	0.0		0.0
Fair Value, Measurements, Recurring | Level 3 | Interest Rate Swap
Liabilities:
Interest rate swap agreements	0.0		0.0
Fair value of debt related to interest rate swap agreements	0.0		0.0
Fair Value, Measurements, Recurring | Level 3 | Convertible Debt Securities
Assets:
VIL OCDs	$ 0.0		$ 0.0

XML

FAIR VALUE MEASUREMENTS - Narrative (Details) $ in Millions, ₨ in Billions	3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Feb. 28, 2023 USD ($)	Feb. 28, 2023 INR (₨)	Dec. 31, 2022 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Asset impairments	$ 0.0	$ 0.0
Long-term obligations	38,542.0				$ 38,670.2
Estimate of Fair Value Measurement
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, fair value	35,500.0				35,100.0
Estimate of Fair Value Measurement | Level 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, fair value	25,600.0				24,500.0
Estimate of Fair Value Measurement | Level 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Long-term debt, fair value	9,900.0				$ 10,600.0
Convertible Debt Securities | Vodafone Idea Limited
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
VIL OCDs, face value			$ 193.2	₨ 16.0
VIL OCDs			$ 116.5
Debt securities, interest rate			11.20%	11.20%
Debt securities, unrealized gain (loss)	$ (15.7)
Convertible Debt Securities | Vodafone Idea Limited | Maturing on August 27, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
VIL OCDs, face value			$ 96.6	₨ 8.0
Convertible Debt Securities | Vodafone Idea Limited | Maturing on August 27, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
VIL OCDs, face value			$ 96.6	₨ 8.0

XML

INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would impact the ETR	$ 86.9	$ 103.6
Unrecognized tax benefits, increase resulting from current period tax positions	1.2
Unrecognized tax benefits, decrease due to foreign currency translation	1.2
Unrecognized tax benefits, decrease from settlements	7.5
Unrecognized tax benefits, reductions due to credits available against existing tax positions	11.6
Unrecognized tax benefits, income tax penalties and interest accrued	43.9	$ 43.3
Minimum
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	0.0
Maximum
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	$ 18.0

XML

INCOME TAXES - Schedule of Penalties and Income Tax Related Expenses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Penalties and income tax-related interest expense	$ 2.8	$ 7.3

XML

STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)		1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 09, 2023	Dec. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Discount from market price (in percent)			15.00%
Unrecognized compensation expense			$ 0
Stock-based compensation expense			$ 65,500,000	$ 56,700,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Unrecognized compensation expense			$ 25,400,000
Expected weighted average recognition period			3 years
Units granted (in shares)			118,684
Stock-based compensation expense			$ 6,800,000
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of potential target shares			0.00%
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of potential target shares			200.00%
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected weighted average recognition period			2 years
Units granted (in shares)			945,029
2007 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issuable under stock incentive plan (in shares)			4,000,000
2007 Plan | Forecast | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Impact of change in vesting terms					$ 7,900,000
2007 Plan | Stock Options and Time-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years	3 years
2007 Plan | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
2007 Plan | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period			10 years
2007 Plan | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense			$ 289,300,000
2023 PSUs | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Units granted (in shares)			118,684
2022 PSUs | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years			3 years
Units granted (in shares)						98,542
2021 PSUs | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years			3 years
Units granted (in shares)							98,694

XML

STOCK-BASED COMPENSATION - Summary of Stock-based Compensation Expenses (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Share-Based Payment Arrangement [Abstract]
Stock-based compensation expense	$ 65.5	$ 56.7

XML

STOCK-BASED COMPENSATION - Summary of the Company's Option Activity (Details)	3 Months Ended
	Mar. 31, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at beginning of period (in shares)	855,154
Options exercised (in shares)	(21,526)
Options forfeited (in shares)	0
Options expired (in shares)	0
Options outstanding at end of period (in shares)	833,628

XML

STOCK-BASED COMPENSATION - Summary of Restricted Stock Activity (Details) - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units outstanding at beginning of period (in shares)	1,382,879
Units granted (in shares)	945,029
Units vested and released (in shares)	(511,200)
Units forfeited (in shares)	(23,247)
Units outstanding at end of period (in shares)	1,793,461	1,382,879
Units vested and deferred (in shares)	0
PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units outstanding at beginning of period (in shares)	276,468
Units granted (in shares)	118,684
Units vested and released (in shares)	(46,850)
Units forfeited (in shares)	0
Units outstanding at end of period (in shares)	348,302	276,468
Units vested and deferred (in shares)	12,677
Vesting period	3 years
PSUs | 2022 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units outstanding at beginning of period (in shares)	98,542
Units granted (in shares)		98,542
Units outstanding at end of period (in shares)		98,542
Vesting period	3 years	3 years
PSUs | 2021 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units outstanding at beginning of period (in shares)	98,694
Units granted (in shares)			98,694
Units outstanding at end of period (in shares)		98,694
Vesting period	3 years	3 years
PSUs | 2020 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units outstanding at beginning of period (in shares)	79,232
Units outstanding at end of period (in shares)		79,232
Vesting period		3 years
Remaining shares vested and expected to vest, outstanding (in shares)	19,705
PSUs | 2023 PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Units granted (in shares)	118,684
Vesting period	3 years

XML

EQUITY - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended
	Aug. 31, 2020	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2017	Mar. 31, 2011
Class of Stock [Line Items]
Proceeds from stock options		$ 1,800,000
Stock offering, value (up to)	$ 1,000,000,000
Treasury stock activity (in shares)		0
Accrued dividend RSU		$ 13,000,000
Paid dividend RSU		$ 6,600,000	$ 6,600,000
2020 ATM Program
Class of Stock [Line Items]
Stock offerings (in shares)		0
2011 Buyback
Class of Stock [Line Items]
Stock repurchase program, authorized amount					$ 1,500,000,000
Treasury stock activity (in shares)		14,451,325
Treasury stock repurchased		$ 1,500,000,000
2017 Buyback
Class of Stock [Line Items]
Stock repurchase program, authorized amount				$ 2,000,000,000
Treasury stock activity (in shares)		0

XML

EQUITY - Distributions Declared (Details) - USD ($) $ / shares in Units, $ in Millions									3 Months Ended
	Apr. 28, 2023	Mar. 08, 2023	Feb. 02, 2023	Dec. 07, 2022	Apr. 29, 2022	Mar. 10, 2022	Jan. 14, 2022	Dec. 15, 2021	Mar. 31, 2023	Mar. 31, 2022
Dividends Payable [Line Items]
Aggregate Payment Amount on common stock									$ 733.6	$ 641.2
Common Stock | Dividends Declared and Paid
Dividends Payable [Line Items]
Distribution per share, common stock (in dollars per share)		$ 1.56		$ 1.56		$ 1.40		$ 1.39
Aggregate Payment Amount on common stock			$ 726.3		$ 638.8		$ 633.5
Common Stock | Dividends Declared and Paid | Subsequent Event
Dividends Payable [Line Items]
Aggregate Payment Amount on common stock	$ 727.0

XML

NONCONTROLLING INTERESTS - Narrative (Details) ৳ in Millions, $ in Millions, € in Billions	1 Months Ended		3 Months Ended	12 Months Ended			48 Months Ended
	Oct. 31, 2022 USD ($)	Aug. 31, 2022 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 BDT (৳)	Aug. 31, 2026
Data Centers | U.S.
Noncontrolling Interest [Line Items]
Stock conversion period		4 years
Data Centers | U.S. | Common stock
Noncontrolling Interest [Line Items]
Controlling ownership interest percentage			0.72
Data Centers | U.S. | Common stock | Forecast
Noncontrolling Interest [Line Items]
Percentage of ownership after transaction							64.00%
KTBL
Noncontrolling Interest [Line Items]
Percentage of interests acquired				51.00%	51.00%	51.00%
Business combination, consideration transferred					$ 10.6	৳ 900
ATC Europe
Noncontrolling Interest [Line Items]
Ownership percentage			52.00%
Germany
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners			13.00%
Spain
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners			17.00%
Stonepeak | Data Centers | U.S.
Noncontrolling Interest [Line Items]
Preferred stock, dividend rate (as a percent)			5.00%
Preferred stock, conversion ratio			1
Stonepeak | Data Centers | U.S. | Common stock
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners			28.00%
Stonepeak | Data Centers | U.S. | Common stock | Forecast
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners							36.00%
Stonepeak | Data Centers | U.S. | Preferred stock
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners			100.00%
ATC Europe | France And Poland
Noncontrolling Interest [Line Items]
Ownership percentage			100.00%
ATC Europe | Germany
Noncontrolling Interest [Line Items]
Ownership percentage			87.00%
ATC Europe | Spain
Noncontrolling Interest [Line Items]
Ownership percentage			83.00%
CDPQ | ATC Europe
Noncontrolling Interest [Line Items]
Ownership interest acquired			30.00%	30.00%	30.00%	30.00%
Allianz | ATC Europe
Noncontrolling Interest [Line Items]
Ownership interest acquired			18.00%	18.00%	18.00%	18.00%
CDPQ & Allianz | ATC Europe
Noncontrolling Interest [Line Items]
Payments to acquire noncontrolling interest				€ 2.6	$ 3,100.0
Confidence Group | KTBL
Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners				49.00%	49.00%	49.00%
Stonepeak | Preferred stock
Noncontrolling Interest [Line Items]
Dividends			$ 11.4
Accrued dividends			$ 11.4
Stonepeak | Data Centers | U.S.
Noncontrolling Interest [Line Items]
Payments to acquire noncontrolling interest	$ 570.0	$ 2,500.0
Stonepeak | Data Centers | U.S. | Common stock
Noncontrolling Interest [Line Items]
Payments to acquire noncontrolling interest		1,750.0
Stonepeak | Data Centers | U.S. | Preferred stock
Noncontrolling Interest [Line Items]
Payments to acquire noncontrolling interest		$ 750.0

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NONCONTROLLING INTERESTS - Schedule of Changes in Noncontrolling Interest (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning of period	$ 12,408.5	$ 9,069.6
Net loss attributable to noncontrolling interests	315.0	702.7
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	232.1	94.4
Distributions to noncontrolling interest holders	(11.5)	(0.2)
Balance at end of period	12,250.3	9,250.7
Noncontrolling Interests
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance at beginning of period	6,836.1	3,988.4
Net loss attributable to noncontrolling interests	(20.8)	(9.0)
Foreign currency translation adjustment attributable to noncontrolling interests, net of tax	39.9	(91.5)
Distributions to noncontrolling interest holders	(11.5)	(0.2)
Balance at end of period	$ 6,843.7	$ 3,887.7

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EARNINGS PER COMMON SHARE - Schedule of Earnings Per Basic and Diluted by Common Class (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income attributable to American Tower Corporation common stockholders	$ 335.8	$ 711.7
Basic weighted average common shares outstanding (in shares)	465,741	455,946
Dilutive securities (in shares)	1,069	1,265
Diluted weighted average common shares outstanding (in shares)	466,810	457,211
Basic net income attributable to American Tower Corporation common stockholders per common share (in dollars per share)	$ 0.72	$ 1.56
Diluted net income attributable to American Tower Corporation common stockholders per common share (in dollars per share)	$ 0.72	$ 1.56

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EARNINGS PER COMMON SHARE - Schedule Of Shares Excluded From Computation Of Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Restricted stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from dilutive effect (in shares)	5	106

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COMMITMENTS AND CONTINGENCIES (Details) $ in Billions		3 Months Ended
	Mar. 27, 2015 USD ($) communicationsSite renewalPeriod	Mar. 31, 2023 USD ($) communicationsSite renewalPeriod	Dec. 31, 2000 communicationsSite
Verizon Transaction
Loss Contingencies [Line Items]
Leased assets, number of communication sites | communicationsSite	11,250
Right to lease, weighted average term	28 years
Aggregate purchase option price for towers | $	$ 5.0
Customer lease, initial term	10 years
Successive terms to renew lease | renewalPeriod	8
Lease renewal term	5 years
AT&T Transaction
Loss Contingencies [Line Items]
Leased assets, number of communication sites | communicationsSite		500	1,900
Aggregate purchase option price for towers | $		$ 1.1
Successive terms to renew lease | renewalPeriod		5
Lease renewal term		5 years
Operating lease, term of contract		27 years

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ACQUISITIONS - Schedule of Merger and Acquisition Related Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Business Combination and Asset Acquisition [Abstract]
Acquisition and merger related expenses	$ 5.0	$ 5.7
Integration costs	$ 2.6	$ 10.0

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ACQUISITIONS - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) communicationSite	Mar. 31, 2022 USD ($)
Business Acquisition [Line Items]
Payment received related to acquisition		$ 1.6
2023 Other Acquisitions | Communication Sites
Business Acquisition [Line Items]
Number of sites acquired | communicationSite	8
Purchase price	$ 17.5
Remaining payable on asset acquisition	$ 8.4

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ACQUISITIONS - Schedule of Allocation of Purchase Price for Asset Acquisitions (Details) - Acquisitions 2023 $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Other
Current assets	$ 1.5
Property and equipment	7.5
Other non-current assets	0.8
Current liabilities	(0.2)
Other non-current liabilities	(0.9)
Net assets acquired	17.5
Fair value of net assets acquired	17.5
Purchase price	17.5
Tenant-related intangible assets
Other
Intangible assets	8.0
Network location intangible assets
Other
Intangible assets	$ 0.8

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BUSINESS SEGMENTS - Summarized Segment Financial Information (Details) - USD ($) $ in Millions		3 Months Ended
	Mar. 29, 2023	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Segment revenues		$ 2,767.2	$ 2,660.3
Segment selling, general, administrative and development expense		263.9	293.9
OPERATING INCOME		775.6	725.1
Stock-based compensation expense		65.5	56.7
Depreciation, amortization and accretion		794.1	815.8
Other expense		97.8	(252.6)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		368.4	725.2
Total assets		66,817.7	69,763.5	$ 67,194.5
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Mexico Fiber
Segment Reporting Information [Line Items]
Loss on sale	$ 80.0
Impairments charges	$ 29.8
Selling, General and Administrative Expenses
Segment Reporting Information [Line Items]
Stock-based compensation expense		65.5	56.7
U.S. & Canada
Segment Reporting Information [Line Items]
Segment revenues		1,340.3	1,291.9
Asia-Pacific
Segment Reporting Information [Line Items]
Segment revenues		251.1	298.5
Africa
Segment Reporting Information [Line Items]
Segment revenues		317.0	267.8
Europe
Segment Reporting Information [Line Items]
Segment revenues		191.7	198.5
Latin America
Segment Reporting Information [Line Items]
Segment revenues		464.1	419.3
Data Centers
Segment Reporting Information [Line Items]
Segment revenues		203.0	184.3
Operating Segments
Segment Reporting Information [Line Items]
Segment revenues		2,767.2	2,660.3
Segment operating expenses		806.1	799.4
Segment gross margin		1,961.1	1,860.9
Segment selling, general, administrative and development expense		138.5	179.3
OPERATING INCOME		1,822.6	1,681.6
Operating Segments | Property
Segment Reporting Information [Line Items]
Segment revenues		2,714.5	2,600.8
Segment operating expenses		787.0	771.5
Segment gross margin		1,927.5	1,829.3
Segment selling, general, administrative and development expense		132.8	173.3
OPERATING INCOME		1,794.7	1,656.0
Total assets		66,152.5	69,117.5
Operating Segments | U.S. & Canada
Segment Reporting Information [Line Items]
Segment revenues		1,287.6	1,232.4
Segment operating expenses		205.3	199.8
Segment gross margin		1,082.3	1,032.6
Segment selling, general, administrative and development expense		40.8	42.8
OPERATING INCOME		1,041.5	989.8
Total assets		26,657.4	27,247.9
Operating Segments | Asia-Pacific
Segment Reporting Information [Line Items]
Segment revenues		251.1	298.5
Segment operating expenses		168.4	175.1
Segment gross margin		82.7	123.4
Segment selling, general, administrative and development expense		8.8	47.9
OPERATING INCOME		73.9	75.5
Total assets		3,879.7	5,102.1
Operating Segments | Africa
Segment Reporting Information [Line Items]
Segment revenues		317.0	267.8
Segment operating expenses		118.5	97.7
Segment gross margin		198.5	170.1
Segment selling, general, administrative and development expense		21.4	22.5
OPERATING INCOME		177.1	147.6
Total assets		4,632.4	4,894.0
Operating Segments | Europe
Segment Reporting Information [Line Items]
Segment revenues		191.7	198.5
Segment operating expenses		73.1	92.3
Segment gross margin		118.6	106.2
Segment selling, general, administrative and development expense		14.6	14.9
OPERATING INCOME		104.0	91.3
Total assets		11,609.5	11,741.3
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Segment revenues		464.1	419.3
Segment operating expenses		137.9	130.0
Segment gross margin		326.2	289.3
Segment selling, general, administrative and development expense		29.7	28.8
OPERATING INCOME		296.5	260.5
Total assets		8,741.0	9,136.0
Operating Segments | Data Centers
Segment Reporting Information [Line Items]
Segment revenues		203.0	184.3
Segment operating expenses		83.8	76.6
Segment gross margin		119.2	107.7
Segment selling, general, administrative and development expense		17.5	16.4
OPERATING INCOME		101.7	91.3
Total assets		10,632.5	10,996.2
Operating Segments | Services
Segment Reporting Information [Line Items]
Segment revenues		52.7	59.5
Segment operating expenses		19.1	27.9
Segment gross margin		33.6	31.6
Segment selling, general, administrative and development expense		5.7	6.0
OPERATING INCOME		27.9	25.6
Total assets		125.2	86.3
Other
Segment Reporting Information [Line Items]
Stock-based compensation expense		65.5	56.7
Other selling, general, administrative and development expense		59.9	57.9
Depreciation, amortization and accretion		794.1	815.8
Other expense		534.7	26.0
Total assets		$ 540.0	$ 559.7