10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One):

x Quarterly report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. For the quarterly period ended June 30, 2016.

¨ 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)

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  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

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

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	¨	Smaller reporting company	¨

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

As of July 21,2016, there were 425,489,212 shares of common stock outstanding.

AMERICAN TOWER CORPORATION

TABLE OF CONTENTS

QUARTERLY REPORT ON FORM 10-Q

FOR THE QUARTER ENDED JUNE 30, 2016

		Page Nos.
PART I. FINANCIAL INFORMATION
Item 1.	Unaudited Consolidated and Condensed Consolidated Financial Statements		1
	Consolidated Balance Sheets as of June 30, 2016 and December 31, 2015		1
	Consolidated Statements of Operations for the three and six months ended June 30, 2016 and 2015		2
	Consolidated Statements of Comprehensive Income (Loss) for the three and six months ended June 30, 2016 and 2015		3
	Condensed Consolidated Statements of Cash Flows for the six months ended June 30, 2016 and 2015		4
	Consolidated Statements of Equity for the six months ended June 30, 2016 and 2015		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		53
Item 4.	Controls and Procedures		53
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings		55
Item 1A.	Risk Factors		55
Item 6.	Exhibits		55
Signatures			56
Exhibit Index			EX-1

PART I. FINANCIAL INFORMATION

ITEM 1. UNAUDITED CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

(in thousands, except share data)

	June 30, 2016			December 31, 2015
ASSETS
CURRENT ASSETS:
Cash and cash equivalents	$	410,538		$	320,686
Restricted cash	142,761			142,193
Accounts receivable, net	285,422			227,354
Prepaid and other current assets	481,879			306,235
Total current assets	1,320,600			996,468
PROPERTY AND EQUIPMENT, net	10,575,425			9,866,424
GOODWILL	4,981,919			4,091,805
OTHER INTANGIBLE ASSETS, net	11,590,692			9,837,876
DEFERRED INCOME TAXES	229,273			212,041
DEFERRED RENT ASSET	1,233,002			1,166,755
NOTES RECEIVABLE AND OTHER NON-CURRENT ASSETS	809,287			732,903
TOTAL	$	30,740,198		$	26,904,272
LIABILITIES
CURRENT LIABILITIES:
Accounts payable	$	120,586		$	96,714
Accrued expenses	617,711			516,413
Distributions payable	227,594			210,027
Accrued interest	151,365			115,672
Current portion of long-term obligations	314,063			50,202
Unearned revenue	224,312			211,001
Total current liabilities	1,655,631			1,200,029
LONG-TERM OBLIGATIONS	18,403,013			17,068,807
ASSET RETIREMENT OBLIGATIONS	951,803			856,936
DEFERRED TAX LIABILITY	745,936			106,333
OTHER NON-CURRENT LIABILITIES	1,058,433			959,349
Total liabilities	22,814,816			20,191,454
COMMITMENTS AND CONTINGENCIES
REDEEMABLE NONCONTROLLING INTERESTS	1,085,157			—
EQUITY:
Preferred stock: $.01 par value; 20,000,000 shares authorized;
5.25%, Series A, 6,000,000 shares issued and outstanding; aggregate liquidation value of $600,000	60			60
5.50%, Series B, 1,375,000 shares issued and outstanding, respectively; aggregate liquidation value of $1,375,000	14			14
Common stock: $.01 par value; 1,000,000,000 shares authorized; 428,071,284 and 426,695,279 shares issued; and 425,261,258 and 423,885,253 shares outstanding, respectively	4,280			4,267
Additional paid-in capital	9,781,223			9,690,609
Distributions in excess of earnings	(1,033,324		)	(998,535		)
Accumulated other comprehensive loss	(1,770,998		)	(1,836,996		)
Treasury stock (2,810,026 shares at cost)	(207,740		)	(207,740		)
Total American Tower Corporation equity	6,773,515			6,651,679
Noncontrolling interests	66,710			61,139
Total equity	6,840,225			6,712,818
TOTAL	$	30,740,198		$	26,904,272

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

1

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
REVENUES:
Property	$	1,426,192		$	1,154,235		$	2,693,843		$	2,216,415
Services	16,035			20,140			37,431			37,150
Total operating revenues	1,442,227			1,174,375			2,731,274			2,253,565
OPERATING EXPENSES:
Costs of operations (exclusive of items shown separately below):
Property (including stock-based compensation expense of $392, $390, $899 and $822, respectively)	452,571			314,285			794,861			573,542
Services (including stock-based compensation expense of $255, $98, $406 and $237, respectively)	7,140			8,173			16,295			13,556
Depreciation, amortization and accretion	397,765			328,356			739,399			591,876
Selling, general, administrative and development expense (including stock-based compensation expense of $21,260, $23,557, $48,681 and $52,847, respectively)	138,234			116,338			273,549			239,628
Other operating expenses	13,711			17,449			22,511			25,223
Total operating expenses	1,009,421			784,601			1,846,615			1,443,825
OPERATING INCOME	432,806			389,774			884,659			809,740
OTHER INCOME (EXPENSE):
Interest income, TV Azteca, net of interest expense of $284, $370, $567 and $740, respectively	2,748			2,662			5,464			5,258
Interest income	6,468			4,404			10,002			7,368
Interest expense	(181,036		)	(148,507		)	(340,916		)	(296,441		)
Gain (loss) on retirement of long-term obligations	830			(75,068		)	830			(78,793		)
Other expense (including unrealized foreign currency (losses) gains of ($24,585), $25,461, $4,777 and ($30,007), respectively)	(25,842		)	(2,129		)	(13,634		)	(56,632		)
Total other expense	(196,832		)	(218,638		)	(338,254		)	(419,240		)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	235,974			171,136			546,405			390,500
Income tax provision	(43,510		)	(13,956		)	(72,634		)	(37,828		)
NET INCOME	192,464			157,180			473,771			352,672
Net income attributable to noncontrolling interests	(4,914		)	(1,124		)	(11,062		)	(3,299		)
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION STOCKHOLDERS	187,550			156,056			462,709			349,373
Dividends on preferred stock	(26,782		)	(26,782		)	(53,563		)	(36,601		)
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS	$	160,768		$	129,274		$	409,146		$	312,772
NET INCOME PER COMMON SHARE AMOUNTS:
Basic net income attributable to American Tower Corporation common stockholders	$	0.38		$	0.31		$	0.96		$	0.76
Diluted net income attributable to American Tower Corporation common stockholders	$	0.37		$	0.30		$	0.95		$	0.75
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC	424,909			423,154			424,484			414,182
DILUTED	429,004			426,933			428,529			418,303
DISTRIBUTIONS DECLARED PER COMMON SHARE	$	0.53		$	0.44		$	1.04		$	0.86

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

2

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(in thousands)

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Net income	$	192,464		$	157,180		$	473,771		$	352,672
Other comprehensive (loss) income:
Changes in fair value of cash flow hedges, net of tax benefit (expense) of $0, ($42), $0 and $9, respectively	(9		)	597			65			(345		)
Reclassification of unrealized (gains) losses on cash flow hedges to net income, net of tax benefit of $0, $22, $0 and $46, respectively	(57		)	2,226			(65		)	2,613
Foreign currency translation adjustments, net of tax expense (benefit) of $2,695, $197, $6,883 and ($12,412), respectively	(177,966		)	(44,029		)	48,326			(476,990		)
Other comprehensive (loss) income	(178,032		)	(41,206		)	48,326			(474,722		)
Comprehensive income (loss)	14,432			115,974			522,097			(122,050		)
Comprehensive loss attributable to noncontrolling interests	12,712			17,421			6,610			37,123
Comprehensive income (loss) attributable to American Tower Corporation stockholders	$	27,144		$	133,395		$	528,707		$	(84,927	)

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

3

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

	Six Months Ended June 30,
	2016			2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$	473,771		$	352,672
Adjustments to reconcile net income to cash provided by operating activities
Depreciation, amortization and accretion	739,399			591,876
Stock-based compensation expense	49,986			53,906
(Gain) loss on early retirement of long-term obligations	(830		)	78,793
Other non-cash items reflected in statements of operations	53,464			75,531
Decrease in restricted cash	12,170			26,804
Increase in net deferred rent asset	(34,931		)	(46,653		)
Increase in assets	(32,984		)	(99,179		)
Increase in liabilities	51,271			2,710
Cash provided by operating activities	1,311,316			1,036,460
CASH FLOWS FROM INVESTING ACTIVITIES
Payments for purchase of property and equipment and construction activities	(319,427		)	(311,122		)
Payments for acquisitions, net of cash acquired	(1,216,467		)	(670,246		)
Payment for Verizon transaction	(4,748		)	(5,060,416		)
Proceeds from sale of short-term investments and other non-current assets	2,601			781,469
Payments for short-term investments	—			(816,038		)
Deposits, restricted cash, investments and other	(5,360		)	(3,087		)
Cash used for investing activities	(1,543,401		)	(6,079,440		)
CASH FLOW FROM FINANCING ACTIVITIES
Repayments of short-term borrowings, net	(2,843		)	—
Borrowings under credit facilities	1,326,866			4,740,308
Proceeds from issuance of senior notes, net	2,237,503			1,492,298
Proceeds from term loan	—			500,000
Proceeds from other borrowings	70,806			—
Proceeds from issuance of securities in securitization transaction, net	—			875,000
Repayments of notes payable, credit facilities and capital leases	(2,858,415		)	(5,931,401		)
Distributions to noncontrolling interest holders, net	(503		)	(383		)
Proceeds from stock options and ESPP	60,361			17,364
Distributions paid on common stock	(426,564		)	(329,766		)
Distributions paid on preferred stock	(53,563		)	(31,085		)
Proceeds from the issuance of common stock, net	—			2,440,327
Proceeds from the issuance of preferred stock, net	—			1,337,946
Payment for early retirement of long-term obligations	(125		)	(86,107		)
Deferred financing costs and other financing activities	(23,264		)	(34,284		)
Cash provided by financing activities	330,259			4,990,217
Net effect of changes in foreign currency exchange rates on cash and cash equivalents	(8,322		)	13,973
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	89,852			(38,790		)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	320,686			313,492
CASH AND CASH EQUIVALENTS, END OF PERIOD	$	410,538		$	274,702
CASH PAID FOR INCOME TAXES (NET OF REFUNDS OF $14,011 AND $3,311, RESPECTIVELY)	$	50,413		$	29,911
CASH PAID FOR INTEREST	$	288,880		$	291,103
NON-CASH INVESTING AND FINANCING ACTIVITIES:
Decrease in accounts payable and accrued expenses for purchases of property and equipment and construction activities	$	(36,083	)	$	(20,632	)
Purchases of property and equipment under capital leases	$	21,651		$	10,510
Settlement of accounts receivable related to acquisitions	$	—		$	735

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

4

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF EQUITY

(in thousands, except share data)

	Preferred Stock - Series A			Preferred Stock - Series B			Common Stock			Treasury Stock					Additional Paid-in Capital		Accumulated Other Comprehensive Loss			Distributions in Excess of Earnings			Noncontrolling Interest			Total Equity
	Issued Shares	Amount		Issued Shares	Amount		Issued Shares	Amount		Shares		Amount
BALANCE, JANUARY 1, 2015	6,000,000	$	60	—	$	—	399,508,751	$	3,995	(2,810,026	)	$	(207,740	)	$	5,788,786	$	(794,221	)	$	(837,320	)	$	99,792		$	4,053,352
Stock-based compensation related activity	—	—		—	—		672,300	6		—		—			49,155		—			—			—			49,161
Issuance of common stock—stock purchase plan	—	—		—	—		43,940	—		—		—			3,465		—			—			—			3,465
Issuance of common stock	—	—		—	—		25,850,000	259		—		—			2,440,068		—			—			—			2,440,327
Issuance of preferred stock	—	—		1,375,000	14		—	—		—		—			1,337,932		—			—			—			1,337,946
Changes in fair value of cash flow hedges, net of tax	—	—		—	—		—	—		—		—			—		(340		)	—			(5		)	(345		)
Reclassification of unrealized losses on cash flow hedges to net income, net of tax	—	—		—	—		—	—		—		—			—		2,583			—			30			2,613
Foreign currency translation adjustment, net of tax	—	—		—	—		—	—		—		—			—		(436,543		)	—			(40,447		)	(476,990		)
Contributions from noncontrolling interest holders	—	—		—	—		—	—		—		—			—		—			—			51			51
Distributions to noncontrolling interest holders	—	—		—	—		—	—		—		—			—		—			—			(434		)	(434		)
Common stock dividends/distributions declared	—	—		—	—		—	—		—		—			—		—			(365,450		)	—			(365,450		)
Preferred stock dividends declared	—	—		—	—		—	—		—		—			—		—			(23,210		)	—			(23,210		)
Net income	—	—		—	—		—	—		—		—			—		—			349,373			3,299			352,672
BALANCE, JUNE 30, 2015	6,000,000	$	60	1,375,000	$	14	426,074,991	$	4,260	(2,810,026	)	$	(207,740	)	$	9,619,406	$	(1,228,521	)	$	(876,607	)	$	62,286		$	7,373,158
BALANCE, JANUARY 1, 2016	6,000,000	$	60	1,375,000	$	14	426,695,279	$	4,267	(2,810,026	)	$	(207,740	)	$	9,690,609	$	(1,836,996	)	$	(998,535	)	$	61,139		$	6,712,818
Stock-based compensation related activity	—	—		—	—		1,331,272	13		—		—			86,767		—			—			—			86,780
Issuance of common stock—stock purchase plan	—	—		—	—		44,733	—		—		—			3,847		—			—			—			3,847
Changes in fair value of cash flow hedges, net of tax	—	—		—	—		—	—		—		—			—		65			—			—			65
Reclassification of unrealized gains on cash flow hedges to net income	—	—		—	—		—	—		—		—			—		(65		)	—			—			(65		)
Foreign currency translation adjustment, net of tax	—	—		—	—		—	—		—		—			—		65,998			—			(665		)	65,333
Contributions from noncontrolling interest holders	—	—		—	—		—	—		—		—			—		—			—			13			13
Distributions to noncontrolling interest holders	—	—		—	—		—	—		—		—			—		—			—			(516		)	(516		)
Common stock dividends/distributions declared	—	—		—	—		—	—		—		—			—		—			(443,935		)	—			(443,935		)
Preferred stock dividends declared	—	—		—	—		—	—												(53,563		)	—			(53,563		)
Net income	—	—		—	—		—	—		—		—			—		—			462,709			6,739			469,448
BALANCE, JUNE 30, 2016	6,000,000	$	60	1,375,000	$	14	428,071,284	$	4,280	(2,810,026	)	$	(207,740	)	$	9,781,223	$	(1,770,998	)	$	(1,033,324	)	$	66,710		$	6,840,225

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

1. DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

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

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

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

On April 21, 2016, the Company significantly expanded its Asia segment portfolio by acquiring a 51% controlling ownership interest in Viom Networks Limited (“Viom”), a telecommunications infrastructure company that owns and operates over 42,000 wireless communications towers and 200 indoor DAS networks in India (the “Viom Acquisition”). Subsequent to the closing, Viom was renamed ATC Telecom Infrastructure Private Limited (“ATC TIPL”).

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

The use of TRSs enables the Company to continue to engage in certain businesses while complying with REIT qualification requirements. The Company may, from time to time, change the election of previously designated TRSs to be included as part of the REIT. As of June 30, 2016, the Company’s REIT-qualified businesses included its U.S. tower leasing business, most of its operations in Costa Rica, Germany and Mexico and a majority of its services segment and indoor DAS networks business.

The accompanying consolidated and condensed consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission. The financial information included herein is unaudited. However, the Company believes that all adjustments 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, 2015 (the “2015 Form 10-K”). The results of operations for the three and six months ended June 30, 2016 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 or cost method, depending

6

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

upon the Company’s ability to exercise significant influence over operating and financial policies. All intercompany accounts and transactions have been eliminated. As of June 30, 2016, the Company has a controlling interest in

two joint ventures in Ghana and Uganda with MTN Group Limited (“MTN Group”). The joint ventures are controlled by a holding company of which a wholly owned subsidiary of the Company holds a 51% interest and a wholly owned subsidiary of MTN Group holds a 49% interest. In addition, the Company holds an approximate 75% controlling interest in a subsidiary of the Company in South Africa and the South African investors hold an approximate 25% noncontrolling interest. The Company also holds a 51% controlling interest in ATC TIPL.

Significant Accounting Policies—The Company’s significant accounting policies are described in note 1 to the Company’s consolidated financial statements included in the 2015 Form 10-K. There have been no material changes to the Company’s significant accounting policies during the six months ended June 30, 2016.

Accounting Standards Updates—In May 2014, the Financial Accounting Standards Board (the “FASB”) issued new revenue recognition guidance, which requires an entity to recognize revenue in an amount that reflects the consideration to which the entity expects to be entitled in exchange for the transfer of promised goods or services to customers. The standard will replace most existing revenue recognition guidance and will become effective for the Company on January 1, 2018. Early adoption is permitted for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2016. The standard permits the use of either the retrospective or cumulative effect transition method. Leases are not included in the scope of this standard. The Company is evaluating the impact this standard will have on its financial statements.

In January 2016, the FASB issued new guidance on the recognition and measurement of financial assets and financial liabilities. The guidance amends certain aspects of recognition, measurement, presentation and disclosure of financial instruments. This standard is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2017. The Company does not expect the adoption of this guidance to have a material effect on its financial statements.

In February 2016, the FASB issued new guidance on the accounting for leases. The guidance amends the existing accounting standards for lease accounting, including the requirement that lessees recognize assets and liabilities for leases with terms greater than twelve months in the statement of financial position. Under the new guidance, lessor accounting is largely unchanged. This guidance is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018. The standard is required to be applied using a modified retrospective approach for all leases existing at, or entered into after, the beginning of the earliest comparative period presented. The Company is evaluating the impact this standard will have on its financial statements.

In March 2016, the FASB issued new guidance on the accounting for share-based payment transactions. The guidance amends the accounting for taxes related to stock-based compensation, including how excess tax benefits and a company’s payments for tax withholdings should be classified. This guidance is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2016. The Company early adopted this standard in the second quarter of 2016 and elected to account for forfeitures as they occur, effective January 1, 2016. The adoption of this guidance was not material to the Company’s consolidated financial statements. Additionally, the Company elected to apply the prospective transition method to the amendments related to the presentation of excess tax benefits in the statements of cash flows.

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

2.    PREPAID AND OTHER CURRENT ASSETS

Prepaid and other current assets consisted of the following (in thousands):

	As of
	June 30, 2016		December 31, 2015
Prepaid income tax	$	151,828	$	45,056
Prepaid operating ground leases	132,629		128,542
Unbilled receivables	59,124		34,173
Prepaid assets	59,063		32,892
Value added tax and other consumption tax receivables	32,258		30,239
Other miscellaneous current assets	46,977		35,333
Total	$	481,879	$	306,235

3.    GOODWILL AND OTHER INTANGIBLE ASSETS

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

	Property										Services		Total
	U.S.		Asia (1)			EMEA			Latin America
Balance as of January 1, 2016	$	3,379,163	$	170,719		$	132,570		$	407,365	$	1,988	$	4,091,805
Additions	289		856,110			3,200			4,615		—		864,214
Effect of foreign currency translation	—		(16,714		)	(18,417		)	61,031		—		25,900
Balance as of June 30, 2016	$	3,379,452	$	1,010,115		$	117,353		$	473,011	$	1,988	$	4,981,919

_______________

(1) Includes approximately $856.1 million of goodwill assumed in the Viom Acquisition (see note 13).

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

		As of June 30, 2016							As of December 31, 2015
	Estimated Useful Lives	Gross Carrying Value		Accumulated Amortization			Net Book Value		Gross Carrying Value		Accumulated Amortization			Net Book Value
	(years)	(in thousands)
Acquired network location intangibles (1)	Up to 20	$	4,589,425	$	(1,175,676	)	$	3,413,749	$	3,980,281	$	(1,052,393	)	$	2,927,888
Acquired customer-related intangibles	15-20	10,139,104		(1,996,896		)	8,142,208		8,640,554		(1,763,853		)	6,876,701
Acquired licenses and other intangibles	3-20	28,756		(3,725		)	25,031		28,293		(5,486		)	22,807
Economic Rights, TV Azteca	70	20,267		(10,563		)	9,704		21,688		(11,208		)	10,480
Total other intangible assets		$	14,777,552	$	(3,186,860	)	$	11,590,692	$	12,670,816	$	(2,832,940	)	$	9,837,876

_______________

(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 or up to 20 years, as the Company considers these intangibles to be directly related to the tower assets.

The acquired network location intangibles represent the value to the Company of the incremental revenue growth that could potentially be obtained from leasing the excess capacity on acquired communications sites. The acquired

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

customer-related intangibles typically represent the value to the Company of customer contracts and relationships in place at the time of an acquisition or similar transaction, including assumptions regarding estimated renewals.

The Company amortizes its acquired network location intangibles and customer-related intangibles on a straight-line basis over their estimated useful lives. As of June 30, 2016, the remaining weighted average amortization period of the Company’s intangible assets, excluding the TV Azteca Economic Rights detailed in note 5 to the Company’s consolidated financial statements included in the 2015 Form 10-K, was 16 years. Amortization of intangible assets for the three and six months ended June 30, 2016 was $185.3 million and $337.1 million, respectively, and amortization of intangible assets for the three and six months ended June 30, 2015 was $147.6 million and $258.1 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 (in millions):

Fiscal Year
Remainder of 2016	$	356.6
2017	710.8
2018	708.6
2019	705.6
2020	686.8
2021	677.5

4.    ACCRUED EXPENSES

Accrued expenses consisted of the following (in thousands):

	As of
	June 30, 2016		December 31, 2015
Accrued property and real estate taxes	$	108,636	$	75,827
Accrued income tax payable	70,490		11,704
Payroll and related withholdings	52,844		62,334
Accrued rent	50,449		54,732
Accrued construction costs	16,550		19,857
Other accrued expenses	318,742		291,959
Total	$	617,711	$	516,413

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

5.    LONG-TERM OBLIGATIONS

Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums and debt issuance costs, consisted of the following (in thousands):

	As of
	June 30, 2016			December 31, 2015			Maturity Date
Series 2013-1A securities (1)	$	498,060		$	497,478		March 15, 2018
Series 2013-2A securities (2)	1,289,478			1,288,689			March 15, 2023
Series 2015-1 notes (3)	346,685			346,262			June 15, 2020
Series 2015-2 notes (4)	519,106			518,776			June 16, 2025
2012 GTP notes (5)	182,233			281,902			March 15, 2019
Unison notes (6)	201,054			201,930			Various
Viom indebtedness (7)	698,274			—			Various
Viom preference shares (8)	24,682			—			Various
Shareholder loans (9)	154,387			145,540			Various
BR Towers debentures (10)	105,191			85,219			October 15, 2023
Colombian credit facility (11)	61,060			59,640			April 24, 2021
South African facility (12)	50,230			53,175			December 17, 2020
Brazil credit facility (13)	31,293			21,868			January 15, 2022
Indian working capital facility (14)	5,688			8,752			July 31, 2016
Total American Tower subsidiary debt	4,167,421			3,509,231
2013 Credit Facility	72,203			1,225,000			June 28, 2019
Term Loan	1,994,238			1,993,601			January 29, 2021
2014 Credit Facility	1,840,000			1,980,000			January 29, 2021
4.500% senior notes	997,944			997,693			January 15, 2018
3.40% senior notes	999,532			999,769			February 15, 2019
7.25% senior notes	296,389			296,242			May 15, 2019
2.800% senior notes	744,239			743,557			June 1, 2020
5.050% senior notes	696,916			697,216			September 1, 2020
3.300% senior notes	744,121			—			February 15, 2021
3.450% senior notes	643,216			642,786			September 15, 2021
5.900% senior notes	497,037			497,188			November 1, 2021
4.70% senior notes	695,671			695,374			March 15, 2022
3.50% senior notes	988,231			987,966			January 31, 2023
5.00% senior notes	1,002,735			1,003,453			February 15, 2024
4.000% senior notes	739,539			739,057			June 1, 2025
4.400% senior notes	494,957			—			February 15, 2026
3.375% senior notes	982,645			—			October 15, 2026
Total American Tower Corporation debt	14,429,613			13,498,902
Other debt, including capital lease obligations	120,042			110,876
Total	18,717,076			17,119,009
Less current portion of long-term obligations	(314,063		)	(50,202		)
Long-term obligations	$	18,403,013		$	17,068,807

_______________

(1)    Maturity date represents anticipated repayment date; final legal maturity is March 15, 2043.

(2)    Maturity date represents anticipated repayment date; final legal maturity is March 15, 2048.

(3) Maturity date represents anticipated repayment date; final legal maturity is June 15, 2045.

(4) Maturity date represents anticipated repayment date; final legal maturity is June 15, 2050.

(5) Secured debt assumed by the Company in connection with its acquisition of MIP Tower Holdings LLC. Maturity date represents anticipated repayment date; final legal maturity is March 15, 2042. During the six months ended June 30, 2016, the Company repaid the $94.1 million outstanding under the Secured Tower Cellular Site Revenue Notes, Series 2012-1 Class A and released 472 sites in connection with the repayment.

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NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(6) Secured debt assumed by the Company in connection with its acquisition of certain legal entities from Unison Holdings LLC and Unison Site Management II, L.L.C. Anticipated repayment dates begin April 15, 2017; final legal maturity date is April 15, 2040.

(7) Debt primarily assumed by the Company in connection with the Viom Acquisition. Maturity dates begin March 31, 2017. In June 2016, the Company refinanced 4.75 billion Indian Rupees (“INR”) of Viom assumed indebtedness with a new short-term committed loan facility with a borrowing capacity of 5.80 billion INR ($85.9 million as of June 30, 2016). Denominated in INR.

(8) Mandatorily redeemable preference shares issued by Viom. The shares are to be redeemed in equal parts on March 26, 2017 and March 26, 2018.

(9) Reflects balances owed to the Company’s joint venture partners in Ghana and Uganda. The Ghana loan is denominated in Ghanaian Cedi and the Uganda loan is denominated in U.S. Dollars.

(10) Publicly issued debentures assumed by the Company in connection with its acquisition of BR Towers S.A. Denominated in Brazilian Reais (“BRL”).

(11) Denominated in Colombian Pesos and amortizes through April 24, 2021.

(12) Denominated in South African Rand and amortizes through December 17, 2020.

(13) Denominated in BRL.

(14) Denominated in INR. This agreement provides that the maturity date may be extended for additional 30-day periods.

Current portion of long-term obligations—The Company’s current portion of long-term obligations includes (i)13.1 billion INR ($194.7 million) of indebtedness primarily assumed by the Company in connection with the Viom Acquisition, including 4.75 billion INR ($70.3 million) outstanding under a short-term committed loan facility which was used to refinance a Viom term loan, (ii) 0.8 billion INR ($12.3 million) related to Viom preference shares, and (iii) $67.4 million outstanding under the Secured Cellular Site Revenue Notes, Series 2010-1 Class C (included in the Unison notes) assumed in connection with the acquisition of Unison.

Viom indebtedness—Amounts outstanding and key terms of the Viom indebtedness consisted of the following as of June 30, 2016 (in millions):

	Amount Outstanding (INR)	Amount Outstanding (USD)		Interest Rate (Range)		Maturity Date (Range)
Term loans	39,745	$	588.6	8.75% - 11.20%		March 31, 2017 - November 30, 2024
Debenture	6,000	$	88.9	9.90	%	April 28, 2020
Working capital facilities	1,406	$	20.8	11.05% - 11.60%		October 23, 2016 - March 18, 2017

The Viom indebtedness includes several term loans, ranging from one to ten years, which are generally secured by the borrower’s short-term and long-term assets. The term loans bear interest at the bank’s Marginal Cost of Funds based Lending Rate or the bank’s base rate, plus spreads ranging from 1.00% to 1.55%. Interest rates on the term loans are fixed until certain annual reset dates. Generally, the term loans can be repaid without penalty on the annual reset dates; earlier repayments require notice to the lenders and are subject to prepayment penalties, typically of 1% to 2%. Scheduled repayment terms include either ratable or staggered amortization with repayments typically commencing between six and 36 months after the initial disbursement of funds.

The debentureis secured by the borrower’s long-term assets, including property and equipment and intangible assets. The debenture bears interest at a base rate plus a spread of 0.6%. The base rate is set in advance for each quarterly coupon period. Should the actual base rate be less than 10.25% or greater than 9.75%, the revised base rate is assumed to be 10.00% for purposes of the reset. Additionally, the spread is subject to reset 36 and 48 months from the issuance date of April 27, 2015. The holders of the debenture must reach a consensus on the revised spread and the borrower must redeem all of the debentures held by holders from whom consensus is not achieved. Additionally, the debenture is required to be redeemed by the borrower if it does not maintain a minimum credit rating.

The Viom indebtedness includes several working capital facilities, most of which are subject to annual renewal, which are generally secured by the borrower’s short-term and long-term assets. The working capital facilities bear interest at rates that are comprised of base rates plus spreads ranging from 1.60% to 2.30%. Generally, the working capital facilities are payable on demand prior to maturity.

Viom preference shares—As of June 30, 2016, ATC TIPL had 166,666,666 mandatorily redeemable preference shares (the “Preference Shares”) outstanding, which are required to be redeemed in cash. Accordingly, the Company recognized debt of 1.67 billion INR ($24.7 million) related to the Preference Shares outstanding on the consolidated balance sheet.

Unless redeemed earlier, the Preference Shares will be redeemed in two equal installments on March 26, 2017 and March 26, 2018 in an amount equal to ten INR per share along with a redemption premium, as defined in the investment

11

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

agreement, which equates to a compounded return of 13.5% per annum. ATC TIPL, at its option, may redeem the Preference Shares prior to the aforementioned dates, subject to an additional 2% redemption premium.

Senior Notes Offerings

3.300% Senior Notes and 4.400% Senior Notes Offering—On January 12, 2016, the Company completed a registered public offering of $750.0 million aggregate principal amount of 3.300% senior unsecured notes due 2021 (the “3.300% Notes”) and $500.0 million aggregate principal amount of 4.400% senior unsecured notes due 2026 (the “4.400% Notes”). The net proceeds from this offering were approximately $1,237.2 million, after deducting commissions and estimated expenses. The Company used the proceeds to repay existing indebtedness under its multicurrency senior unsecured revolving credit facility entered into in June 2013, as amended (the “2013 Credit Facility”) and for general corporate purposes.

The 3.300% Notes will mature on February 15, 2021 and bear interest at a rate of 3.300% per annum. The 4.400% Notes will mature on February 15, 2026 and bear interest at a rate of 4.400% per annum. Accrued and unpaid interest on the notes will be payable in U.S. Dollars semi-annually in arrears on February 15 and August 15 of each year, beginning on August 15, 2016. Interest on the notes is computed on the basis of a 360-day year comprised of twelve 30-day months and commenced accruing on January 12, 2016.

3.375% Senior Notes Offering—On May 13, 2016, the Company completed a registered public offering of $1.0 billion aggregate principal amount of 3.375% senior unsecured notes due 2026 (the “3.375% Notes”). The net proceeds from this offering were approximately $981.5 million, after deducting commissions and estimated expenses. The Company used the proceeds to repay existing indebtedness under the 2013 Credit Facility.

The 3.375% Notes will mature on October 15, 2026 and bear interest at a rate of 3.375% per annum. Accrued and unpaid interest on the notes will be payable in U.S. Dollars semi-annually in arrears on April 15 and October 15 of each year, beginning on October 15, 2016. Interest on the notes is computed on the basis of a 360-day year comprised of twelve 30-day months and commenced accruing on May 13, 2016.

The Company may redeem each series of 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 3.300% Notes on or after January 15, 2021, the 4.400% Notes on or after November 15, 2025 or the 3.375% Notes on or after July 15, 2026, it will not be required to pay a make-whole premium. In addition, if the Company undergoes a change of control and corresponding ratings decline, each as defined in the applicable supplemental indenture, it may be required to repurchase all of the applicable notes at a purchase price equal to 101% of the principal amount of such notes, plus accrued and unpaid interest (including additional interest, if any), up to but not including the repurchase date. The notes rank equally with all of the Company’s other senior unsecured debt and are structurally subordinated to all existing and future indebtedness and other obligations of its subsidiaries.

The supplemental indentures contain 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 such liens does not exceed 3.5x Adjusted EBITDA, as defined in the applicable supplemental indenture.

Bank Facilities

2013 Credit Facility—During the six months ended June 30, 2016, the Company borrowed an aggregate of $1.2 billion and repaid an aggregate of $2.4 billion of revolving indebtedness under the 2013 Credit Facility. The Company primarily used the borrowings to fund the Viom Acquisition. On July 15, 2016, the Company borrowed $110.0 million under the 2013 Credit Facility.

2014 Credit Facility—During the six months ended June 30, 2016, the Company borrowed an aggregate of $80.0 million and repaid an aggregate of $220.0 million of revolving indebtedness under its senior unsecured revolving credit facility entered into in January 2012 and amended and restated in September 2014, as further amended (the “2014 Credit Facility”).

12

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

As of June 30, 2016, the key terms under the 2013 Credit Facility, the 2014 Credit Facility and the Company’s unsecured term loan entered into in October 2013, as amended (the “Term Loan”) were as follows:

	Outstanding Principal Balance (in millions)		Undrawn letters of credit (in millions)		Maturity Date	Current margin over LIBOR (1)		Current commitment fee (2)
2013 Credit Facility	$	72.2	$	3.2	June 28, 2019 (3)	1.250	%	0.150	%
2014 Credit Facility	$	1,840.0	$	7.4	January 29, 2021 (3)	1.250	%	0.150	%
Term Loan	$	2,000.0	N/A		January 29, 2021	1.250	%	N/A

_______________

(1)    LIBOR means the London Interbank Offered Rate.

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

(3)    Subject to two optional renewal periods.

6.    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 value of the Company’s financial assets and liabilities that are required to be measured on a recurring basis at fair value was as follows (in thousands):

	June 30, 2016				December 31, 2015
	Fair Value Measurements Using				Fair Value Measurements Using
	Level 2		Level 3		Level 2		Level 3
Assets:
Interest rate swap agreements	$	751	—		$	692	—
Embedded derivative in lease agreement	—		$	13,735	—		$	14,176
Liabilities:
Acquisition-related contingent consideration	—		$	12,225	—		$	12,436

During the six months ended June 30, 2016, the Company has made no changes to the methods described in note 11 to the Company’s consolidated financial statements in the 2015 Form 10-K that it used to measure the fair value of its interest rate swap agreements, the embedded derivative in one of its lease agreements and acquisition-related contingent consideration. The changes in fair value during the six months ended June 30, 2016 and 2015 were not material to the consolidated financial statements.  As of June 30, 2016, the Company estimated the value of all potential acquisition-related contingent consideration required payments to be between zero and $26.3 million.

13

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Redeemable Noncontrolling Interests

In connection with the Viom Acquisition, the Company entered into a shareholders’ agreement that provides for put options held by certain noncontrolling shareholders (see note 9). The fair value of the Company’s noncontrolling interests reflected on the consolidated balance sheet are determined using a discounted cash flow approach, which takes into consideration Level 3 unobservable inputs and applies a discount factor.

The fair value of the redeemable noncontrolling interests was $1.1 billion at the date of acquisition and was recorded in  

Redeemable noncontrolling interests in the consolidated balance sheet.

See notes 9 and 13 for more information.

Items Measured at Fair Value on a Nonrecurring Basis

Assets Held and Used—The Company’s long-lived assets are recorded at amortized cost and, if impaired, are adjusted to fair value using Level 3 inputs. During the three and six months ended June 30, 2016 and 2015, the Company did not record any material asset impairment charges.

There were no other items measured at fair value on a nonrecurring basis during the six months ended June 30, 2016.

Fair Value of Financial Instruments—The Company’s financial instruments for which the carrying value reasonably approximates fair value at June 30, 2016 and December 31, 2015 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 June 30, 2016 and December 31, 2015, the carrying value of long-term obligations, including the current portion, was $18.7 billion and $17.1 billion, respectively. As of June 30, 2016, the fair value of long-term obligations, including the current portion, was $19.5 billion, of which $11.3 billion was measured using Level 1 inputs and $8.2 billion was measured using Level 2 inputs. As of December 31, 2015, the fair value of long-term obligations, including the current portion, was $17.4 billion, of which $8.7 billion was measured using Level 1 inputs and $8.7 billion was measured using Level 2 inputs.

7.    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. As a REIT, the Company continues to be subject to income taxes on the income of its TRSs and income taxes in foreign jurisdictions where it conducts international operations. 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 REIT operations. In addition, the Company is able to offset certain income by utilizing its net operating losses, subject to specified limitations.

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 positive and negative evidence to estimate if sufficient future taxable income will be generated to use the existing deferred tax assets.

As described in note 1, effective January 1, 2016, the Company adopted new guidance on the accounting for share-based payment transactions. As part of this new guidance, excess windfall tax benefits and tax deficiencies related to the Company’s stock option exercises and restricted stock unit vestings are recognized as an income tax benefit or expense in the consolidated statements of operations in the period in which the deduction occurs. Excess windfall tax benefits and tax deficiencies are, therefore, not anticipated when determining the annual ETR and are instead recognized in the interim period in which those items occur.

As of June 30, 2016 and December 31, 2015, the total unrecognized tax benefits that would impact the ETR, if recognized, were approximately $68.6 million and $28.1 million, respectively. The amount of unrecognized tax benefits during the three and six months ended June 30, 2016 includes additions to the Company’s existing tax positions of $32.8

14

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

million and $39.3 million, respectively, both of which include $23.8 million of tax positions assumed through acquisition, and foreign currency fluctuations of $0.4 million and $1.2 million, respectively. The Company expects the unrecognized tax benefits to change over the next 12 months if certain tax matters ultimately settle with the applicable taxing jurisdiction during this time frame, as described in note 12 to the Company’s consolidated financial statements included in the 2015 Form 10-K. The impact of the amount of these changes to previously recorded uncertain tax positions could range from zero to $14.1 million.

The Company recorded penalties and income tax-related interest expense during the three and six months ended June 30, 2016 of $2.2 million and $5.2 million, respectively, and during the three and six months ended June 30, 2015 of $0.6 million and $1.5 million, respectively. As of June 30, 2016 and December 31, 2015, the total amount of accrued income tax related interest and penalties included in the consolidated balance sheets was $25.0 million and $20.2 million, respectively.

8.    STOCK-BASED COMPENSATION

Summary of Stock-Based Compensation Plans—The Company maintains equity incentive plans that provide for the grant of stock-based awards to its directors, officers and employees. The 2007 Equity Incentive Plan (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 in the case of non-qualified and incentive stock options are not less than the fair value of the underlying common stock on the date of grant. Equity awards typically vest ratably, generally over four years for time-based restricted stock units (“RSUs”) and stock options and three years for performance-based restricted stock units (“PSUs”). Stock options generally expire ten years from the date of grant. As of June 30, 2016, the Company had the ability to grant stock-based awards with respect to an aggregate of 9.4 million shares of common stock under the 2007 Plan. In addition, the Company maintains an employee stock purchase plan (“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 of 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.

The Company recognized stock-based compensation expense of $21.9 million and $50.0 million during the three and six months ended June 30, 2016, respectively, and recognized stock-based compensation expense of $24.0 million and $53.9 million during the three and six months ended June 30, 2015, respectively. The Company capitalized $0.1 million and $0.8 million of stock-based compensation expense as property and equipment during the three and six months ended June 30, 2016, respectively, and capitalized $0.6 million and $1.1 million of stock-based compensation expense as property and equipment during the three and six months ended June 30, 2015, respectively.

Stock Options—The fair value of each option granted during the six months ended June 30, 2016 was estimated on the date of grant using the Black-Scholes option pricing model based on the assumptions noted in the table below. The expected life of stock options (estimated period of time outstanding) was estimated using the vesting term and historical exercise behavior of the Company’s employees. The risk-free interest rate was based on the U.S. Treasury yield with a term that approximated the estimated life in effect at the accounting measurement date. The expected volatility of the underlying stock price was based on historical volatility for a period equal to the expected life of the stock options. The expected annual dividend yield was the Company’s best estimate of expected future dividend yield.

Key assumptions used to apply this pricing model during the six months ended June 30, 2016 were as follows:

Range of risk-free interest rate	1.45% - 1.73%
Weighted average risk-free interest rate	1.45%
Range of expected life of stock options	4.5 - 5.2 years
Range of expected volatility of the underlying stock price	20.64% - 21.45%
Weighted average expected volatility of underlying stock price	21.45%
Range of expected annual dividend yield	1.85% - 2.40%

The weighted average grant date fair value per share during the six months ended June 30, 2016 was $14.56. As of June 30, 2016, total unrecognized compensation expense related to unvested stock options was $34.8 million, which is expected to be recognized over a weighted average period of approximately two years.

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

The Company’s option activity for the six months ended June 30, 2016 was as follows:

	Number of Options
Outstanding as of January 1, 2016	7,680,819
Granted	1,132,596
Exercised	(907,829	)
Forfeited	(16,320	)
Expired	(500	)
Outstanding as of June 30, 2016	7,888,766

Restricted Stock Units—As of June 30, 2016, total unrecognized compensation expense related to unvested RSUs granted under the 2007 Plan was $115.6 million and is expected to be recognized over a weighted average period of approximately three years.

Performance-Based Restricted Stock Units—During the six months ended June 30, 2016, the Compensation Committee granted an aggregate of 169,340 PSUs to its executive officers (the “2016 PSUs”) and established the performance metrics for this award. During the six months ended June 30, 2015, the Compensation Committee granted an aggregate of 70,135 PSUs to its executive officers (the “2015 PSUs”) and established the performance metric for this award. Threshold, target and maximum parameters were established for the metrics for a three-year performance period with respect to the 2016 PSUs and for each year in the three-year performance period with respect to the 2015 PSUs and will be used to calculate the number of shares that will be issuable when the award vests, which may range from zero to 200% of the target amount. At the end of the 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 the performance period, subject generally to the executive’s continued employment. PSUs will accrue dividend equivalents prior to vesting, which will be paid out only in respect of shares actually vested.

The performance metric related to the 2015 PSUs is tied to year-over-year growth, and actual results for the metric cannot be determined until the end of each respective fiscal year. As a result, as of June 30, 2016, the Company was unable to determine the annual target for the third year of the performance period for this award. Accordingly, an aggregate of 23,377 PSUs was not included in the table below.

Restricted Stock Units and Performance-Based Restricted Stock Units—The Company’s RSU and PSU activity for the six months ended June 30, 2016 was as follows:

	RSUs		PSUs
Outstanding as of January 1, 2016 (1)	1,656,993		33,377
Granted (2)	767,421		192,719
Vested	(635,126	)	—
Forfeited	(54,053	)	—
Outstanding as of June 30, 2016	1,735,235		226,096

_______________

(1) PSUs represent the shares issuable for the 2015 PSUs at the end of the three-year performance cycle based on exceeding the performance metric for the first year’s performance period.

(2) PSUs represent the target number of shares issuable at the end of the three-year performance cycle attributable to the second year’s performance period for the 2015 PSUs and the target number of shares issuable at the end of the three-year performance cycle for the 2016 PSUs.

During the three and six months ended June 30, 2016, the Company recorded $2.4 million and $3.2 million, respectively, in stock-based compensation expense for equity awards in which the performance goals had been established and were probable of being achieved. The remaining unrecognized compensation expense related to these awards at June 30, 2016 was $16.6 million based on the Company’s current assessment of the probability of achieving the performance goals. The weighted-average period over which the cost will be recognized is approximately two years.

9.    REDEEMABLE NONCONTROLLING INTERESTS

Redeemable Noncontrolling Interests—In connection with the Viom Acquisition, the Company, through one of its subsidiaries, entered into a shareholders agreement (the “Shareholders Agreement”) with Viom and the following remaining Viom shareholders: Tata Sons Limited, Tata Teleservices Limited, IDFC Private Equity Fund III, Macquarie SBI Investments Pte Limited and SBI Macquarie Infrastructure Trust (collectively, the “Remaining Shareholders”). The Shareholders Agreement provides for, among other things, put options held by certain of the Remaining Shareholders, which allow the Remaining Shareholders to sell outstanding shares of ATC TIPL, and call options held by the Company, which allow the Company to buy the nonontrolling shares of ATC TIPL. The put options, which are not under the Company’s control, cannot be separated from the noncontrolling interests. As a result, the combination of the noncontrolling interests and the redemption feature require classification as redeemable noncontrolling interests in the consolidated balance sheet, separate from equity.

Given the provisions governing the put rights, the redeemable noncontrolling interests are recorded outside of permanent equity at their redemption value. The noncontrolling interests become redeemable after the passage of time, and therefore the Company records the carrying amount of the noncontrolling interests at the greater of (i) the initial carrying amount, increased or decreased for the noncontrolling interests’ share of net income or loss, and (ii) the redemption value. If required, the Company will adjust the redeemable noncontrolling interests to redemption value on each balance sheet date with changes in redemption value recognized as an adjustment to Distributions in excess of earnings.

The put options may be exercised, requiring the Company to purchase the Remaining Shareholders’ equity interests, on specified dates beginning April 1, 2018 through March 31, 2021. The price of the put options will be based on the fair market value of the exercising Remaining Shareholder’s interest in the Company’s India operations at the time the option is exercised. Put options held by certain of the Remaining Shareholders are subject to a floor price of 216 INR per share.

The following is a reconciliation of the changes in the Redeemable noncontrolling interests (in thousands):

Balance as of January 1, 2016	$	—
Fair value at acquisition	1,097,841
Net income attributable to noncontrolling interests	4,323
Foreign currency translation adjustment attributable to noncontrolling interests	(17,007		)
Balance as of June 30, 2016	$	1,085,157

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

10.    EQUITY

Series A Preferred Stock—The Company has 6,000,000 shares of its 5.25% Mandatory Convertible Preferred Stock, Series A, par value $0.01 per share (the “Series A Preferred Stock”) outstanding, which were issued in May 2014. 

Unless converted or redeemed earlier, each share of the Series A Preferred Stock will automatically convert on May 15, 2017, into between 0.9272 and 1.1591 shares of the Company’s common stock, depending on the applicable market value of the Company’s common stock and subject to anti-dilution adjustments. Subject to certain restrictions, at any time prior to May 15, 2017, holders of the Series A Preferred Stock may elect to convert all or a portion of their shares into common stock at the minimum conversion rate then in effect.

Dividends on shares of the Series A Preferred Stock are payable on a cumulative basis when, as and if declared by the Company’s Board of Directors at an annual rate of 5.25% on the liquidation preference of $100.00 per share, on February 15, May 15, August 15 and November 15 of each year, commencing on August 15, 2014 to, and including, May 15, 2017.

Series B Preferred Stock—The Company has 13,750,000 depositary shares, each representing a 1/10th interest in a share of its 5.50% Mandatory Convertible Preferred Stock, Series B, par value $0.01 per share (the “Series B Preferred Stock” and, together with the Series A Preferred Stock, the “Mandatory Convertible Preferred Stock”) outstanding, which were issued in March 2015.

Unless converted or redeemed earlier, each share of the Series B Preferred Stock will automatically convert on February 15, 2018, into between 8.5911 and 10.3093 shares of the Company’s common stock, depending on the applicable market value of the Company’s common stock and subject to anti-dilution adjustments. Subject to certain restrictions, at any time prior to February 15, 2018, holders of the Series B Preferred Stock may elect to convert all or a portion of their shares into common stock at the minimum conversion rate then in effect.

Dividends on shares of the Series B Preferred Stock are payable on a cumulative basis when, as and if declared by the Company’s Board of Directors at an annual rate of 5.50% on the liquidation preference of $1,000.00 per share (and, correspondingly, $100.00 per share with respect to the depositary shares) on February 15, May 15, August 15 and November 15 of each year, commencing on May 15, 2015 to, and including, February 15, 2018.

The Company may pay dividends in cash or, subject to certain limitations, in shares of common stock or any combination of cash and shares of common stock. The terms of the Mandatory Convertible Preferred Stock provide that, unless full cumulative dividends have been paid or set aside for payment on all outstanding Mandatory Convertible Preferred Stock for all prior dividend periods, no dividends may be declared or paid on common stock.

Sales of Equity Securities—The Company receives proceeds from the sale of its equity securities pursuant its ESPP and upon exercise of stock options granted under its equity incentive plan. During the six months ended June 30, 2016, the Company received an aggregate of $60.4 million in proceeds upon exercises of stock options and ESPP.

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NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Distributions—During the six months ended June 30, 2016, the Company declared or paid the following cash distributions:

Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (in millions)
Common Stock
December 3, 2015	January 13, 2016	December 16, 2015	$	0.49	$	207.7
March 9, 2016	April 28, 2016	April 12, 2016	$	0.51	$	216.5
June 2, 2016	July 15, 2016	June 17, 2016	$	0.53	$	225.4
Series A Preferred Stock
January 14, 2016	February 16, 2016	February 1, 2016	$	1.3125	$	7.9
April 16, 2016	May 16, 2016	May 1, 2016	$	1.3125	$	7.9
Series B Preferred Stock
January 14, 2016	February 16, 2016	February 1, 2016	$	13.75	$	18.9
April 16, 2016	May 16, 2016	May 1, 2016	$	13.75	$	18.9

The Company accrues distributions on unvested restricted stock units, which are payable upon vesting. As of June 30, 2016, the amount accrued for distributions payable related to unvested restricted stock units was $4.8 million. During the six months ended June 30, 2016, the Company paid $2.4 million of distributions upon the vesting of restricted stock units. To maintain its qualification for taxation as a REIT, the Company expects to continue paying distributions, the amount, timing and frequency of which will be determined, and subject to adjustment, by the Company’s Board of Directors.

11.    EARNINGS PER COMMON SHARE

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Net income attributable to American Tower Corporation stockholders	$	187,550		$	156,056		$	462,709		$	349,373
Dividends on preferred stock	(26,782		)	(26,782		)	(53,563		)	(36,601		)
Net income attributable to American Tower Corporation common stockholders	160,768			129,274			409,146			312,772
Basic weighted average common shares outstanding	424,909			423,154			424,484			414,182
Dilutive securities	4,095			3,779			4,045			4,121
Diluted weighted average common shares outstanding	429,004			426,933			428,529			418,303
Basic net income attributable to American Tower Corporation common stockholders per common share	$	0.38		$	0.31		$	0.96		$	0.76
Diluted net income attributable to American Tower Corporation common stockholders per common share	$	0.37		$	0.30		$	0.95		$	0.75

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

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 June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
Restricted stock awards	—	—	1	—
Stock options	1,120	1,734	1,974	1,229
Preferred stock	17,444	17,349	17,444	13,364

12.    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 provides for the lease, sublease or management of 11,286 wireless communications sites commencing March 27, 2015. The average term of the lease or sublease for all sites at the inception of the agreement was approximately 28 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the leased sites in tranches, subject to the applicable lease, sublease or management rights upon its scheduled expiration. Each tower is assigned to an annual tranche, ranging from 2034 to 2047, which represents the outside expiration date for the sublease rights to the towers in that tranche. The purchase price for each tranche is a fixed amount stated in the lease for such tranche plus the fair market value of certain alterations made to the related towers. The aggregate purchase option price for the towers leased and subleased is approximately $5.0 billion. Verizon will occupy the sites as a tenant for an initial term of ten years with eight optional successive five-year terms; each such term shall be governed by standard master lease agreement terms established as a part of the transaction.

AT&T Transaction—The Company has an agreement with SBC Communications Inc., a predecessor entity to AT&T Inc. (“AT&T”), that currently provides for the lease or sublease of approximately 2,370 towers commencing between December 2000 and August 2004. Substantially all of the towers are part of the Company’s 2013 securitization transaction. The average term of the lease or sublease for all sites at the inception of the agreement was approximately 27 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the sites subject to the applicable lease or sublease upon its expiration. Each tower is assigned to an annual tranche, ranging from 2013 to 2032, which represents the outside expiration date for the sublease rights to that tower. The purchase price for each site is a fixed amount stated in the lease for that site plus the fair market value of certain alterations made to the related tower by AT&T. As of June 30, 2016, the Company has purchased an aggregate of 60 of the subleased towers upon expiration of the applicable agreement. The aggregate purchase option price for the remaining towers leased and subleased is $730.5 million and will accrete at a rate of 10% per annum through the applicable expiration of the lease or sublease of a site. For all such sites purchased by the Company prior to June 30, 2020, AT&T will continue to lease the reserved space at the then-current monthly fee, which shall escalate in accordance with the standard master lease agreement for the remainder of AT&T’s tenancy. Thereafter, AT&T shall have the right to renew such lease for up to four successive five-year terms. For all such sites purchased by the Company subsequent to June 30, 2020, AT&T has the right to continue to lease the reserved space for successive one-year terms at a rent equal to the lesser of the agreed upon market rate and the then-current monthly fee, which is subject to an annual increase based on changes in the U.S. Consumer Price Index.

ALLTEL Transaction—In December 2000, the Company entered into an agreement with ALLTEL, a predecessor entity to Verizon Wireless, to acquire towers through a 15-year sublease agreement. Pursuant to the agreement, as amended, with Verizon Wireless, the Company acquired rights to approximately 1,800 towers in tranches between April 2001 and March 2002. The Company has the option to purchase each tower at the expiration of the applicable sublease. The Company exercised the purchase options for approximately 1,525 towers in a single closing to occur on or before November 30, 2016. The Company has provided notice to the tower owner of its intent to exercise the purchase options

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

related to the remaining towers. As of June 30, 2016, the purchase price per tower was $42,844 payable in cash or, at Verizon Wireless’s or its assignee’s option, as applicable, with 769 shares of the Company’s common stock per tower. The aggregate cash purchase option price for the subleased towers was $75.7 million as of June 30, 2016.

Other Contingencies—The Company is subject to income tax and other taxes in the geographic areas where it operates, and periodically receives notifications of audits, assessments or other actions by taxing authorities. The Company evaluates the circumstances of each notification based on the information available and records a liability for any potential outcome that is probable or more likely than not unfavorable if the liability is also reasonably estimable.

Tenant Leases—The Company’s lease agreements with its tenants vary depending upon the region and the industry of the tenant, and typically have initial terms of ten years with multiple renewal terms at the option of the tenant.

Future minimum rental receipts expected from tenants under non-cancellable operating lease agreements in effect at June 30, 2016 were as follows (in millions):

Remainder of 2016	$	2,424
2017	4,594
2018	4,413
2019	4,149
2020	3,794
Thereafter	12,485
Total	$	31,859

Lease Obligations—The Company leases certain land, office and tower space under operating leases that expire over various terms. Many of the leases contain renewal options with specified increases in lease payments upon exercise of the renewal option. Escalation clauses present in operating leases, excluding those tied to a consumer price index or other inflation-based indices, are recognized on a straight-line basis over the non-cancellable term of the leases.

Future minimum rental payments under non-cancellable operating leases include payments for certain renewal periods at the Company’s option because failure to renew could result in a loss of the applicable communications sites and related revenues from tenant leases, thereby making it reasonably assured that the Company will renew the leases. Such payments at June 30, 2016 are as follows (in millions):

Remainder of 2016	$	461
2017	889
2018	863
2019	829
2020	790
Thereafter	7,329
Total	$	11,161

13.    ACQUISITIONS

Impact of current year acquisitions—The Company typically acquires communications sites from wireless carriers or other tower operators and subsequently integrates those sites into its existing portfolio of communications sites. The financial results of the Company’s acquisitions have been included in the Company’s consolidated statements of operations for the three and six months ended June 30, 2016 from the date of the respective acquisition. The date of acquisition, and by extension the point at which the Company begins to recognize the results of an acquisition, may depend on, among other things, the receipt of contractual consents, the commencement and extent of leasing arrangements and the timing of the transfer of title or rights to the assets, which may be accomplished in phases. Sites acquired from communications service providers may never have been operated as a business and may instead have been utilized solely by the seller as a component of its network infrastructure. An acquisition may or may not involve the transfer of business operations or employees.

The estimated aggregate impact of the 2016 acquisitions on the Company’s revenues and gross margin for both the three and six months ended June 30, 2016 was approximately $158.0 million and $65.2 million, respectively. The revenues and gross margin amounts also reflect incremental revenues from the addition of new tenants to such sites subsequent to the transaction date.

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. Acquisition and merger related expenses may include finder’s fees, advisory, legal, accounting, valuation and other professional or consulting fees, fair value adjustments to contingent consideration and general administrative costs directly related to the transaction. Integration costs include incremental and non-recurring costs necessary to convert data, retain employees and otherwise enable the Company to operate new businesses efficiently. The Company records acquisition and merger related expenses, as well as integration costs, in Other operating expenses in the consolidated statements of operations.

During the three and six months ended June 30, 2016 and 2015, the Company recorded acquisition and merger related expenses and integration costs as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Acquisition and merger related expenses	$	5,735	$	5,021	$	6,720	$	7,987
Integration costs	$	3,234	$	4,525	$	6,505	$	6,280

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

The acquisitions described below are accounted for as business combinations and are consistent with the Company’s strategy to expand in selected geographic areas.

2016 Acquisitions

Viom Acquisition—On April 21, 2016, the Company, through its wholly owned subsidiary, ATC Asia Pacific Pte. Ltd. (“ATC Asia”), acquired a 51% controlling ownership interest in Viom, a telecommunications infrastructure company that owns and operates over 42,000 wireless communications towers and 200 indoor DAS networks in India, from certain Viom shareholders, including the managing shareholder, SREI Infrastructure Finance Limited, several other minority shareholders and Tata Teleservices Limited (collectively, the “Selling Shareholders”), pursuant to its previously announced share purchase agreement. Consideration for the acquisition included 76.4 billion INR in cash ($1.1 billion at the date of acquisition), as well as the assumption of approximately 52.3 billion INR ($0.8 billion at the date of acquisition) of existing debt, which included 1.7 billion INR ($25.1 million at the date of acquisition) of mandatorily redeemable preference shares issued by Viom.

On April 21, 2016, the closing date of the Viom Acquisition, ATC Asia’s Shareholders Agreement with the Remaining Shareholders became effective. The Shareholders Agreement provides that, among other things, the Remaining Shareholders will have certain governance, anti-dilution and contractual rights. The Remaining Shareholders will have put options, and ATC Asia will have a call option, subject to the time periods and conditions outlined in the Shareholders Agreement.

Other Acquisitions—During the six months ended June 30, 2016, the Company acquired a total of 433 communications sites in the United States, Brazil, Germany and Nigeria for an aggregate purchase price of $79.8 million. The purchase prices are subject to post-closing adjustments.

The following table summarizes the preliminary allocation of the purchase price for the fiscal year 2016 acquisitions based upon their estimated fair value at the date of acquisition (in thousands). Balances are reflected in the accompanying consolidated balance sheet as of June 30, 2016.

	Asia			Other
	Viom
Current assets	$	283,854		$	6,050
Non-current assets	45,962			—
Property and equipment	765,127			24,251
Intangible assets (1):
Customer-related intangible assets	1,364,466			36,314
Network location intangible assets	639,438			8,928
Current liabilities	(180,734		)	(55		)
Deferred tax liability	(635,529		)	—
Other non-current liabilities	(105,458		)	(3,833		)
Net assets acquired	2,177,126			71,655
Goodwill (2)	856,110			8,104
Fair value of net assets acquired	3,033,236			79,759
Debt assumed	(786,889		)	—
Redeemable noncontrolling interests	(1,097,841		)	—
Purchase Price (3)	$	1,148,506		$	79,759

_______________

(1) Customer-related intangible assets and network location intangible assets are amortized on a straight-line basis over periods of up to 20 years.

(2) Primarily results from purchase accounting adjustments which are not deductible for tax purposes.

(3) Other includes contingent consideration of $0.1 million.

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

2015 Acquisitions

The estimates of the fair value of the assets or rights acquired and liabilities assumed at the date of the applicable acquisition are subject to adjustment during the measurement period (up to one year from the applicable acquisition date). During the six months ended June 30, 2016, the Company adopted new guidance on the accounting for measurement-period adjustments related to business combinations. This guidance requires that an acquirer make adjustments to the provisional amounts recognized at acquisition date with a corresponding adjustment to goodwill in the current period. Additionally, the effects on earnings of all measurement-period adjustments are included in current period earnings.

During the six months ended June 30, 2016, post-closing adjustments impacted the following 2015 acquisitions:

TIM Acquisition—On April 29, 2015, the Company acquired 4,176 communications sites from TIM Celular S.A. (“TIM”) for an initial aggregate purchase price of $644.3 million, which was subsequently reduced by $0.8 million during the six months ended June 30, 2016. On September 30, 2015, the Company acquired an additional 1,125 communications sites from TIM for an initial aggregate purchase price of $130.9 million. On December 16, 2015, the Company acquired an additional 182 communications sites from TIM for an initial aggregate purchase price of $21.7 million. The purchase price for the September and December 2015 TIM acquisitions remain subject to post-closing adjustments. Pursuant to the terms of the agreement, the Company has the ability to purchase the remaining communications sites as they become available through October 2016, a portion of which was acquired during the three months ended June 30, 2016.

The following table summarizes the preliminary and updated allocations of the purchase prices paid and the amounts of assets acquired and liabilities assumed for the fiscal year 2015 acquisitions based upon their estimated fair value at the date of acquisition (in thousands).

	Preliminary Allocation			Updated Allocation (1)
	Latin America			Latin America
	TIM			TIM
Current assets	$	—		$	—
Non-current assets	—			—
Property and equipment	275,630			275,570
Intangible assets (2):
Customer-related intangible assets	361,822			361,048
Network location intangible assets	115,562			115,577
Current liabilities	(3,192		)	(3,192		)
Deferred tax liability	—			—
Other non-current liabilities	(74,966		)	(74,966		)
Net assets acquired	674,856			674,037
Goodwill	122,011			122,011
Fair value of net assets acquired	796,867			796,048
Debt assumed	—			—
Purchase Price	$	796,867		$	796,048

_______________

(1) The allocation of the purchase price related to the initial 4,176 communications sites acquired from TIM on April 29, 2015 was finalized during the six months ended June 30, 2016.

(2) Customer-related intangible assets and network location intangible assets are amortized on a straight-line basis over periods of up to 20 years.

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Pro Forma Consolidated Results

The following table presents the unaudited pro forma financial results as if the 2016 acquisitions had occurred on January 1, 2015 and acquisitions completed in 2015 had occurred on January 1, 2014. The pro forma results do not include any anticipated cost synergies, costs or other integration impacts. Accordingly, such pro forma amounts are not necessarily indicative of the results that actually would have occurred had the transactions been completed on the date indicated, nor are they indicative of the future operating results of the Company.

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Pro forma revenues	$	1,489,485	$	1,447,850	$	2,976,772	$	2,918,700
Pro forma net income attributable to American Tower Corporation common stockholders	$	164,191	$	129,154	$	408,945	$	280,165
Pro forma net income per common share amounts:
Basic net income attributable to American Tower Corporation common stockholders	$	0.39	$	0.31	$	0.96	$	0.66
Diluted net income attributable to American Tower Corporation common stockholders	$	0.38	$	0.30	$	0.95	$	0.66

Other Signed Acquisitions

Airtel Tanzania—On March 17, 2016, the Company entered into a definitive agreement with Airtel, through its subsidiary company Airtel Tanzania Limited (“Airtel Tanzania”), pursuant to which the Company may acquire approximately 1,350 of Airtel Tanzania’s communications sites in Tanzania, for total consideration of approximately $179.0 million, subject to customary adjustments. Under the agreement, the Company may pay additional consideration to acquire up to approximately 100 additional communications sites currently in development. The closing of this transaction is subject to customary closing conditions and regulatory approval.

14.    BUSINESS SEGMENTS

In 2015, as a result of recent investment activity, including signed acquisitions, the Company reviewed and changed its reportable segments to divide its international segment into three regional segments: (i) Asia property, (ii) Europe, Middle East and Africa (“EMEA”) property and (iii) Latin America property, resulting in five total segments. The change in reportable segments had no impact on the Company’s consolidated and condensed consolidated financial statements for any periods. However, certain expenses previously reflected in segment selling, general, administrative and development expense have been reclassified and are now reflected as Other selling, general, administrative and development expense. Historical financial information included in this Quarterly Report on Form 10-Q has been adjusted to reflect the change in reportable segments.

The Company’s primary business is leasing space on multitenant communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. This business is referred to as the Company’s property operations, which as of June 30, 2016, consisted of the following:

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

• Asia: property operations in India;

• EMEA: property operations in Germany, Ghana, Nigeria, South Africa and Uganda; and

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

The Company has applied the aggregation criteria to operations within the EMEA and Latin America property operating segments on a basis that is consistent with management’s review of information and performance evaluations of these regions.

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

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

The accounting policies applied in compiling segment information below are similar to those described in note 1 to the Company’s consolidated financial statements included in the 2015 Form 10-K. Among other factors, in evaluating financial performance in each business segment, management uses segment gross margin and segment operating profit. The Company defines segment gross margin as segment revenue less segment operating expenses excluding stock-based compensation expense recorded in costs of operations; Depreciation, amortization and accretion; Selling, general, administrative and development expense; and Other operating expenses. The Company defines segment operating profit as segment gross margin less Selling, general, administrative and development expense attributable to the segment, excluding stock-based compensation expense and corporate expenses. For reporting purposes, the Latin America property segment gross margin and segment operating profit also include Interest income, TV Azteca, net. These measures of segment gross margin and segment operating profit are also before Interest income, Interest expense, Gain (loss) on retirement of long-term obligations, Other income (expense), Net income (loss) attributable to noncontrolling interests and Income tax benefit (provision). The categories of expenses indicated above, such as depreciation, have been excluded from segment operating performance as they are not considered in the review of information or the evaluation of results by management. There are no significant revenues resulting from transactions between the Company’s operating segments. All intercompany transactions are eliminated to reconcile segment results and assets to the consolidated statements of operations and consolidated balance sheets.

Summarized financial information concerning the Company’s reportable segments for the three and six months ended June 30, 2016 and 2015 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, as the amounts are not utilized in assessing each segment’s performance.

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AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

	Property								Total  Property		Services		Other		Total
Three Months Ended June 30, 2016	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	829,680	$	224,611	$	134,762	$	237,139	$	1,426,192	$	16,035			$	1,442,227
Segment operating expenses (1)	182,376		127,855		58,462		83,486		452,179		6,885				459,064
Interest income, TV Azteca, net	—		—		—		2,748		2,748		—				2,748
Segment gross margin	647,304		96,756		76,300		156,401		976,761		9,150				985,911
Segment selling, general, administrative and development expense (1)	34,721		14,770		16,685		15,031		81,207		3,346				84,553
Segment operating profit	$	612,583	$	81,986	$	59,615	$	141,370	$	895,554	$	5,804			$	901,358
Stock-based compensation expense													$	21,907	21,907
Other selling, general, administrative and development expense													32,421		32,421
Depreciation, amortization and accretion													397,765		397,765
Other expense (2)													213,291		213,291
Income from continuing operations before income taxes															$	235,974
Total assets	$	18,949,936	$	4,557,692	$	2,025,767	$	4,929,052	$	30,462,447	$	62,766	$	214,985	$	30,740,198

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $0.6 million and $21.3 million, respectively.

(2)    Primarily includes interest expense.

	Property								Total  Property		Services		Other		Total
Three Months Ended June 30, 2015	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	802,841	$	60,009	$	70,408	$	220,977	$	1,154,235	$	20,140			$	1,174,375
Segment operating expenses (1)	182,172		31,628		24,198		75,897		313,895		8,075				321,970
Interest income, TV Azteca, net	—		—		—		2,662		2,662		—				2,662
Segment gross margin	620,669		28,381		46,210		147,742		843,002		12,065				855,067
Segment selling, general, administrative and development expense (1)	31,243		4,480		11,952		12,990		60,665		3,439				64,104
Segment operating profit	$	589,426	$	23,901	$	34,258	$	134,752	$	782,337	$	8,626			$	790,963
Stock-based compensation expense													$	24,045	24,045
Other selling, general, administrative and development expense (2)													28,677		28,677
Depreciation, amortization and accretion													328,356		328,356
Other expense (3)													238,749		238,749
Income from continuing operations before income taxes															$	171,136
Total assets (4)	$	19,383,596	$	748,268	$	1,159,978	$	4,930,775	$	26,222,617	$	71,268	$	175,840	$	26,469,725

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $0.5 million and $23.6 million, respectively.

(2) Includes $0.6 million of expense previously recorded as segment selling, general, administrative and development expense.

(3) Primarily includes interest expense and loss on retirement of long-term obligations.

(4) $21.2 million of assets previously recorded within the Asia, EMEA, and Latin America Property segments have been reclassified to the Other segment.

25

AMERICAN TOWER CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED AND CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

	Property								Total  Property		Services		Other		Total
Six Months Ended June 30, 2016	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	1,681,424	$	287,827	$	264,402	$	460,190	$	2,693,843	$	37,431			$	2,731,274
Segment operating expenses (1)	360,098		160,935		114,121		158,808		793,962		15,889				809,851
Interest income, TV Azteca, net	—		—		—		5,464		5,464		—				5,464
Segment gross margin	1,321,326		126,892		150,281		306,846		1,905,345		21,542				1,926,887
Segment selling, general, administrative and development expense (1)	72,007		21,346		32,837		29,615		155,805		6,262				162,067
Segment operating profit	$	1,249,319	$	105,546	$	117,444	$	277,231	$	1,749,540	$	15,280			$	1,764,820
Stock-based compensation expense													$	49,986	49,986
Other selling, general, administrative and development expense													62,801		62,801
Depreciation, amortization and accretion													739,399		739,399
Other expense (2)													366,229		366,229
Income from continuing operations before income taxes															$	546,405

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $1.3 million and $48.7 million, respectively.

(2) Primarily includes interest expense.

	Property								Total  Property		Services		Other		Total
Six Months Ended June 30, 2015	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	1,520,721	$	117,136	$	146,209	$	432,349	$	2,216,415	$	37,150			$	2,253,565
Segment operating expenses (1)	315,204		61,288		52,713		143,515		572,720		13,319				586,039
Interest income, TV Azteca, net	—		—		—		5,258		5,258		—				5,258
Segment gross margin	1,205,517		55,848		93,496		294,092		1,648,953		23,831				1,672,784
Segment selling, general, administrative and development expense (1)	58,065		11,309		20,811		30,252		120,437		6,875				127,312
Segment operating profit	$	1,147,452	$	44,539	$	72,685	$	263,840	$	1,528,516	$	16,956			$	1,545,472
Stock-based compensation expense													$	53,906	53,906
Other selling, general, administrative and development expense (2)													59,469		59,469
Depreciation, amortization and accretion													591,876		591,876
Other expense (3)													449,721		449,721
Income from continuing operations before income taxes															$	390,500

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $1.1 million and $52.8 million, respectively.

(2)    Includes $2.2 million of expense previously recorded as segment selling, general, administrative and development expense.

(3)    Primarily includes interest expense and loss on retirement of long-term obligations.

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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 contains forward-looking statements relating to our goals, beliefs, plans or current expectations and other statements that are not of historical facts. For example, when we use words such as “project,” “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, 2015 (the “2015 Form 10-K”). Forward-looking statements represent management’s current expectations 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 our financial statements. This discussion should be read in conjunction with our consolidated and condensed consolidated financial statements herein and the accompanying notes thereto, information set forth under the caption “Critical Accounting Policies and Estimates” in the 2015 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 property interests that we lease to communications service providers and third-party tower operators. We refer to this business as our property operations, which accounted for 99% of our total revenues for the six months ended June 30, 2016 and includes our U.S. property segment, Asia property segment, Europe, Middle East and Africa (“EMEA”) property segment and Latin America property segment.

Through our services segment, we offer tower-related services, including site acquisition, zoning and permitting and structural analysis services, which primarily support our site leasing business, including the addition of new tenants and equipment on our sites.

On April 21, 2016, we acquired a 51% controlling ownership interest in Viom Networks Limited (“Viom”), a telecommunications infrastructure company that owns and operates over 42,000 wireless communications towers and 200 indoor distributed antenna system (“DAS”) networks in India (the “Viom Acquisition”). Subsequent to the closing, Viom was renamed ATC Telecom Infrastructure Private Limited (“ATC TIPL”). The results of operations for ATC TIPL have been included since the date of acquisition.

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The following table details the number of communications sites, excluding managed sites, that we owned or operated as of June 30, 2016:

	Number of Owned Towers	Number of Operated  Towers (1)	Number of Owned DAS Sites
U.S.	21,864	18,227	342
Asia:
India	57,891	—	239
EMEA:
Germany	2,182	—	—
Ghana	2,128	—	18
Nigeria	4,719	—	—
South Africa	1,969	—	—
Uganda	1,393	—
EMEA total	12,391	—	18
Latin America:
Brazil	16,095	2,268	57
Chile	1,207	—	6
Colombia	3,061	706	1
Costa Rica	484	—	1
Mexico	8,603	199	63
Peru	627	—	—
Latin America total	30,077	3,173	128

_______________

(1) Approximately 96% of the operated towers are held pursuant to long-term capital leases, including those subject to purchase options.

We operate in five reportable segments: U.S. property, Asia property, EMEA property, Latin America property and services. In evaluating operating performance in each business segment, management uses, among other factors, segment gross margin and segment operating profit (see note 14 to our consolidated and condensed consolidated financial statements included herein).

In the section that follows, we provide information regarding management’s expectations of long-term drivers of demand for our communications sites, as well as our current results of operations, financial position and sources and uses of liquidity. In addition, we highlight key trends, which management believes provide valuable insight into our operating and financial resource allocation decisions.

Revenue Growth. The primary factors affecting the revenue growth in our property segments are:

•Growth in tenant billings, including:

• New revenue attributable to leases in place at the commencement of operations on sites acquired or constructed since the beginning of the prior-year period;

• Contractual rent escalations on existing tenant leases, net of churn (as defined below); and

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

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

Due to our diversified communications site portfolio, our tenant lease rates vary considerably depending upon numerous factors, including, but not limited to, the amount and type of tenant equipment on the tower, remaining tower capacity and tower location. We measure the remaining tower capacity by assessing several factors, including tower height, tower type, environmental conditions, existing equipment on the tower and zoning and permitting regulations in

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effect in the jurisdiction where the tower is located. In many instances, tower capacity can be increased with relatively modest tower augmentation expenditures.

The majority of our tenant leases with wireless carriers have an initial non-cancellable term of at least ten years, with multiple renewal terms. Accordingly, nearly all of the revenue generated by our property operations during the three and six months ended June 30, 2016 was recurring revenue that we should continue to receive in future periods. Based upon foreign currency exchange rates and the tenant leases in place as of June 30, 2016, we expect to generate approximately $32 billion of non-cancellable tenant lease revenue over future periods, absent the impact of straight-line lease accounting. Most of our tenant leases have provisions that periodically increase the rent due under the lease, typically based on an annual fixed escalation (averaging approximately 3% in the United States) or an inflationary index in our international markets, or a combination of both. In addition, certain of our tenant leases provide for additional revenue to cover costs, such as ground rent or power and fuel costs.

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

Revenue lost from either cancellations or the non-renewal of leases or rent negotiations historically has not had a material adverse effect on the revenues generated by our property operations. We define churn as revenue lost when a tenant cancels or does not renew its lease or, in limited circumstances, when the lease rates on existing leases are reduced. We derive our churn rate for a given period by dividing our revenue lost on this basis by our prior-year period property segment revenue. During the six months ended June 30, 2016, churn represented approximately 1% of our property operations revenue.

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

Consistent with our strategy to increase the utilization and return on investment of our sites, our objective is to add new tenants and new equipment for existing tenants through collocation and lease amendments. Our ability to lease additional space on our sites is primarily a function of the rate at which wireless carriers deploy capital to improve and expand their wireless networks. This rate, in turn, is influenced by the growth of wireless services, the penetration of advanced wireless devices, the financial performance of our tenants and their access to capital and general economic conditions.

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

• In less advanced wireless markets where initial voice and data networks are still being deployed, we expect these deployments to drive demand for our tower space as carriers seek to expand their footprints and increase the scope and density of their networks. We have established operations in many of these markets at the early stages of wireless development, which we believe will enable us to meaningfully participate in these deployments.

• Subscribers’ use of wireless data continues to grow rapidly given increasing smartphone and other advanced device penetration, the proliferation of bandwidth-intensive applications on these devices and the continuing evolution of the mobile ecosystem. We believe carriers will be compelled to deploy additional equipment on

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existing networks while also rolling out more advanced wireless networks to address coverage and capacity needs resulting from this increasing wireless data usage.

• The deployment of advanced wireless technology across existing wireless networks will provide higher speed data services and further enable fixed broadband substitution. As a result, we expect that our tenants will continue deploying additional equipment across their existing networks.

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

• Wireless service providers continue to acquire additional spectrum, and as a result are expected to add additional sites and equipment to their networks as they seek to optimize their network configuration and utilize additional spectrum.

As part of our international expansion initiatives, we have targeted markets in various stages of network development to diversify our international exposure and position us to benefit from a number of different wireless technology deployments over the long term. In addition, we have focused on building relationships with large multinational carriers such as Bharti Airtel Limited (“Airtel”), Telefónica S.A. and Vodafone Group PLC. We believe that consistent carrier investments in their networks across our international markets position us to generate meaningful organic revenue growth going forward.

In emerging markets, such as Ghana, India, Nigeria and Uganda, wireless networks tend to be significantly less advanced than those in the United States, and initial voice networks continue to be deployed in underdeveloped areas. A majority of consumers in these markets still utilize basic wireless services, predominantly on feature phones, while advanced device penetration remains low.

In more developed urban locations within these markets, early-stage data network deployments are underway. Carriers are focused on completing voice network build-outs while also investing in initial data networks as wireless data usage and smartphone penetration within their customer bases begin to accelerate.

In markets with rapidly evolving network technology, such as South Africa and most of the countries in Latin America where we do business, initial voice networks, for the most part, have already been built out, and carriers are focused on third generation (3G) and fourth generation (4G) network build outs. Consumers in these regions are increasingly adopting smartphones and other advanced devices, and, as a result, the usage of bandwidth-intensive mobile applications is growing materially. Recent spectrum auctions in these rapidly evolving markets have allowed incumbent carriers to accelerate their data network deployments and have also enabled new entrants to begin initial investments in data networks. Smartphone penetration and wireless data usage in these markets are growing rapidly, which typically requires that carriers continue to invest in their networks in order to maintain and augment their quality of service.

Finally, in markets with more mature network technology, such as Germany, carriers are focused on deploying 4G data networks to account for rapidly increasing wireless data usage among their customer base. With higher smartphone and advanced device penetration and significantly higher per capita data usage, carrier investment in networks is focused on 4G coverage and capacity.

We believe that the network technology migration we have seen in the United States, which has led to significantly denser networks and meaningful new business commencements for us over a number of years, will ultimately be replicated in our less advanced international markets. As a result, we expect to be able to leverage our extensive international portfolio of approximately 103,915 communications sites and the relationships we have built with our carrier customers to drive sustainable, long-term growth.

We have master lease agreements with certain of our tenants that provide for consistent, long-term revenue and reduce the likelihood of churn. Our holistic master lease agreements build and augment strong strategic partnerships with

30

our tenants and have significantly reduced collocation cycle times, thereby providing our tenants with the ability to rapidly and efficiently deploy equipment on our sites.

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

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

Non-GAAP Financial Measures

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

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

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

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

We define AFFO attributable to American Tower Corporation common stockholders as Consolidated AFFO, excluding the impact of noncontrolling interests on both NAREIT FFO (common stockholders) as well as 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 NAREIT FFO (common stockholders), Consolidated AFFO nor AFFO (common stockholders) represent 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,

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including our ability to make cash distributions. Rather, Adjusted EBITDA, NAREIT FFO (common stockholders), Consolidated AFFO and AFFO (common stockholders) are presented as we believe each is a useful indicator of our current operating performance. We believe that these metrics are useful to an investor in evaluating our operating performance because (1) each is a key measure used by our management team for decision making purposes and for evaluating our operating segments’ performance; (2) Adjusted EBITDA is a component underlying our credit ratings; (3) Adjusted EBITDA is widely used in the telecommunications real estate sector to measure operating performance as depreciation, amortization and accretion may vary significantly among companies depending upon accounting methods and useful lives, particularly where acquisitions and non-operating factors are involved; (4) Consolidated AFFO is widely used in the telecommunications real estate sector to adjust NAREIT FFO (common stockholders) for items that may otherwise cause material fluctuations in NAREIT FFO (common stockholders) growth from period to period that would not be representative of the underlying performance of property assets in those periods; (5) each provides investors with a meaningful measure for evaluating our period-to-period operating performance by eliminating items that are not operational in nature; and (6) each provides investors with a measure for comparing our results of operations to those of other companies, particularly those in our industry.

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

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Results of Operations

Three and Six Months EndedJune 30,2016and2015

(in thousands, except percentages)

Revenue

	Three Months Ended June 30,				Percent Increase (Decrease)		Six Months Ended June 30,				Percent Increase (Decrease)
	2016		2015				2016		2015
Property
U.S.	$	829,680	$	802,841	3	%	$	1,681,424	$	1,520,721	11	%
Asia	224,611		60,009		274		287,827		117,136		146
EMEA	134,762		70,408		91		264,402		146,209		81
Latin America	237,139		220,977		7		460,190		432,349		6
Total property	1,426,192		1,154,235		24		2,693,843		2,216,415		22
Services	16,035		20,140		(20	)	37,431		37,150		1
Total revenues	$	1,442,227	$	1,174,375	23	%	$	2,731,274	$	2,253,565	21	%

Three Months Ended June 30, 2016

U.S. property segment revenue growth of $26.8 million, or 3%, was attributable to tenant billings growth of $42.6 million, which was driven by:

• $32.2 million due to collocations and amendments;

• $9.0 million from contractual escalations, net of churn;

• $1.1 million generated from newly acquired or constructed sites; and

• $0.3 million from other tenant billings.

Segment growth was offset by a decrease in revenue of $15.8 million, primarily due to a $9.8 million impact of straight-line accounting.

Asia property segment revenue growth of $164.6 million, or 274%, was attributable to:

• Tenant billings growth of $103.2 million, which was driven by:

• $99.6 million generated from newly acquired or constructed sites, primarily due to the Viom Acquisition;

• $4.5 million due to collocations and amendments; partially offset by    

• A decrease of $0.6 million resulting from churn in excess of contractual escalations; and

• A decrease of $0.3 million from other tenant billings;

• Pass-through revenue growth of $68.9 million, primarily due to the Viom Acquisition; and

• $4.9 million of other revenue growth, primarily due to the impact of straight-line accounting.

Segment growth was partially offset by a decrease of $12.4 million attributable to the negative impact of foreign currency translation related to fluctuations in Indian Rupee (“INR”).

EMEA property segment revenue growth of $64.4 million, or 91%, was attributable to:

• Tenant billings growth of $48.7 million, which was driven by:

• $37.7 million generated from newly acquired or constructed sites, including sites acquired from Airtel in Nigeria;

• $5.7 million due to collocations and amendments;

• $3.9 million from contractual escalations, net of churn; and

• $1.4 million from other tenant billings;

• Pass-through revenue growth of $18.9 million; and

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• $1.9 million of other revenue growth, partially offset by a $0.4 million impact of straight-line accounting.

Segment growth was partially offset by a decrease of $4.7 million attributable to the negative impact of foreign currency translation, which included, among others, $4.5 million related to fluctuations in South African Rand (“ZAR”) and $1.6 million related to fluctuations in Ugandan Shilling (“UGX”). The devaluation of the Nigerian Naira did not have a significant impact on revenue for the three months ended June 30, 2016 due to the timing of the change, as well as the fact that a substantial portion of our contracts are denominated in USD.

Latin America property segment revenue growth of $16.2 million, or 7%, was attributable to:

• Tenant billings growth of $33.4 million, which was driven by:

• $13.7 million generated from newly acquired or constructed sites;

• $10.7 million from contractual escalations, net of churn;

• $8.7 million due to collocations and amendments; and

• $0.3 million from other tenant billings;

• Pass-through revenue growth of $18.9 million; and

• $0.8 million of other revenue growth, primarily due to an $8.9 million increase attributable to the impact of straight-line accounting, partially offset by a $7.0 million reduction in revenue resulting from a judicial reorganization of a tenant in Brazil.

Segment growth was partially offset by a decrease of $36.9 million attributable to the negative impact of foreign currency translation, which included, among others, $17.0 million related to fluctuations in Brazilian Real (“BRL”), $14.8 million related to fluctuations in Mexican Peso (“MXN”) and $3.9 million related to fluctuations in Colombian Peso (“COP”).

The decrease in services segment revenue of $4.1 million, or 20%, was primarily attributable to a decrease in zoning, permitting and site acquisition projects.

Six Months Ended June 30, 2016

U.S. property segment revenue growth of $160.7 million, or 11%, was attributable to:

• Tenant billings growth of $168.7 million, which was driven by:

• $89.4 million generated from newly acquired or constructed sites, including sites associated with our transaction with Verizon Communications Inc. (“Verizon”);

• $61.9 million due to collocations and amendments;

• $18.7 million from contractual escalations, net of churn; partially offset by

• A decrease of $1.3 million from other tenant billings; and

• An increase of $6.0 million in decommissioning revenue.

Segment growth was partially offset by a decrease of $14.0 million, primarily due to the impact of straight-line accounting.

Asia property segment revenue growth of $170.7 million, or 146%, was attributable to:

• Tenant billings growth of $110.7 million, which was driven by:

• $102.8 million generated from newly acquired or constructed sites, primarily due to the Viom Acquisition;

• $9.0 million due to collocations and amendments; partially offset by

• A decrease of $0.8 million resulting from churn in excess of contractual escalations; and

• A decrease of $0.3 million from other tenant billings;

• Pass-through revenue growth of $73.1 million, primarily due to the Viom Acquisition; and

• $4.6 million of other revenue growth, primarily due to the impact of straight-line accounting.

Segment growth was partially offset by a decrease of $17.7 million attributable to the negative impact of foreign currency translation related to fluctuations in INR.

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EMEA property segment revenue growth of $118.2 million, or 81%, was attributable to:

• Tenant billings growth of $96.3 million, which was driven by:

• $76.2 million generated from newly acquired or constructed sites, including sites acquired from Airtel;

• $11.4 million due to collocations and amendments;

• $8.3 million from contractual escalations, net of churn; and

• $0.4 million from other tenant billings;

• Pass-through revenue growth of $38.3 million; and

• $2.3 million of other revenue growth, partially offset by a $0.9 million impact of straight-line accounting.

Segment growth was partially offset by a decrease of $17.8 million attributable to the negative impact of foreign currency translation, which included, among others, $10.6 million related to fluctuations in ZAR, $4.2 million related to fluctuations in UGX and $2.9 million related to fluctuations in Ghanaian Cedi (“GHS”).

Latin America property segment revenue growth of $27.8 million, or 6%, was attributable to:

• Tenant billings growth of $74.1 million, which was driven by:

• $33.1 million generated from newly acquired or constructed sites;

• $21.4 million from contractual escalations, net of churn;

• $18.5 million due to collocations and amendments; and

• $1.1 million from other tenant billings;

• Pass-through revenue growth of $46.9 million; and

• An increase of $10.0 million in other revenue, primarily due to a $16.0 million impact of straight-line accounting offset in part by a $7.0 million reduction in revenue resulting from a judicial reorganization of a tenant in Brazil.     

Segment growth was partially offset by a decrease of $103.2 million attributable to the negative impact of foreign currency translation, which included, among others, $59.0 million related to fluctuations in BRL, $32.1 million related to fluctuations in MXN and $9.7 million related to fluctuations in COP.

Gross Margin

	Three Months Ended June 30,				Percent Increase (Decrease)		Six Months Ended June 30,				Percent Increase (Decrease)
	2016		2015				2016		2015
Property
U.S.	$	647,304	$	620,669	4	%	$	1,321,326	$	1,205,517	10	%
Asia	96,756		28,381		241		126,892		55,848		127
EMEA	76,300		46,210		65		150,281		93,496		61
Latin America	156,401		147,742		6		306,846		294,092		4
Total property	976,761		843,002		16		1,905,345		1,648,953		16
Services	9,150		12,065		(24	)%	21,542		23,831		(10	)%

Three Months Ended June 30, 2016

• The increase in U.S. property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $0.2 million.

• The increase in Asia property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $103.2 million. Direct expenses were partially offset by $7.0 million attributable to the impact of foreign currency translation. Direct expense growth was primarily due to sites associated with the Viom Acquisition.

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• The increase in EMEA property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $35.9 million. Direct expenses were partially offset by $1.6 million attributable to the impact of foreign currency translation. Direct expense growth was primarily due to sites acquired from Airtel.

• 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 $20.4 million. Direct expenses were partially offset by $12.9 million attributable to the impact of foreign currency translation. Direct expense growth was primarily due to newly acquired or constructed sites.

• The decrease in services segment gross margin was primarily due to the decrease in revenue described above.

Six Months Ended June 30, 2016

• The increase in U.S. property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $44.9 million. Direct expense growth was primarily due to sites associated with our transaction with Verizon.

• The increase in Asia property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $109.4 million. Direct expenses were partially offset by $9.8 million attributable to the impact of foreign currency translation. Direct expense growth was primarily due to sites associated with the Viom Acquisition.

• The increase in EMEA property segment gross margin was primarily attributable to the increase in revenue described above, partially offset by an increase in direct expenses of $68.0 million. Direct expenses were partially offset by $6.6 million attributable to the impact of foreign currency translation. Direct expense growth was primarily due to sites acquired from Airtel.

• 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 $51.2 million. Direct expenses were partially offset by $36.1 million attributable to the impact of foreign currency translation. Direct expense growth was primarily due to newly acquired or constructed sites.

• The decrease in services segment gross margin was attributable to an increase in labor costs associated with work performed by our tower services group, partially offset by the increase in revenue.

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

	Three Months Ended June 30,				Percent Increase (Decrease)		Six Months Ended June 30,				Percent Increase (Decrease)
	2016		2015				2016		2015
Property
U.S.	$	34,721	$	31,243	11	%	$	72,007	$	58,065	24	%
Asia	14,770		4,480		230		21,346		11,309		89
EMEA	16,685		11,952		40		32,837		20,811		58
Latin America	15,031		12,990		16		29,615		30,252		(2	)
Total property	81,207		60,665		34		155,805		120,437		29
Services	3,346		3,439		(3	)	6,262		6,875		(9	)
Other (1)	53,681		52,234		3		111,482		112,316		(1	)
Total selling, general, administrative and development expense	$	138,234	$	116,338	19	%	$	273,549	$	239,628	14	%

_______________

(1) Certain expenses previously reflected in segment SG&A for the three and six months ended June 30, 2015 have been reclassified and are now reflected as Other SG&A.

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Three Months Ended June 30, 2016

• The increases in each of our property segments’ SG&A were primarily driven by increased personnel costs to support our business, including additional costs associated with the Viom Acquisition in our Asia property segment and Airtel in our EMEA property segment. The Asia and EMEA property segments’ SG&A increase also included increases in bad debt expense of $1.3 million and $1.1 million, respectively. The increase in our Latin America property segment SG&A was partially offset by the impacts of foreign currency fluctuations.

• The increase in other SG&A was primarily attributable to an increase in corporate SG&A, partially offset by a decrease in stock-based compensation expense of $2.3 million.

Six Months Ended June 30, 2016

• The increases in each of our U.S., Asia, and EMEA property segments’ SG&A were primarily driven by increased personnel costs to support our business, including additional costs associated with the transaction with Verizon in our U.S. property segment, the Viom Acquisition in our Asia property segment and Airtel in our EMEA property segment. The EMEA property segment SG&A increase also included an increase in bad debt expense of $3.4 million and was partially offset by a decrease attributable to the impacts of foreign currency fluctuations. The increases in our Asia property segment SG&A also included an increase in bad debt expense of $1.4 million.

• The slight decrease in our Latin America property segment was primarily due to the impacts of foreign currency fluctuations, partially offset by increased personnel costs to support our business.

• The slight decrease in other SG&A for the six months ended June 30,2016 was due to a decrease in stock-based compensation expense of $4.2 million, partially offset by an increase in corporate SG&A of $3.3 million.

Operating Profit

	Three Months Ended June 30,				Percent Increase (Decrease)		Six Months Ended June 30,				Percent Increase (Decrease)
	2016		2015				2016		2015
Property
U.S.	$	612,583	$	589,426	4	%	$	1,249,319	$	1,147,452	9	%
Asia	81,986		23,901		243		105,546		44,539		137
EMEA	59,615		34,258		74		117,444		72,685		62
Latin America	141,370		134,752		5		277,231		263,840		5
Total property	895,554		782,337		14		1,749,540		1,528,516		14
Services	5,804		8,626		(33	)%	15,280		16,956		(10	)%

The growth in operating profit for the three and six months ended June 30, 2016 for each of our U.S., Asia and EMEA property segments, as well as our Latin America property segment for the three months ended June 30, 2016, was primarily attributable to an increase in our segment gross margin, partially offset by an increase in our segment SG&A.

The growth in operating profit for the six months ended June 30, 2016 in our Latin America property segment was primarily attributable to an increase in our segment gross margin combined with a decrease in our segment SG&A.

The decrease in operating profit for the three and six months ended June 30, 2016 for our services segment was primarily attributable to a decrease in our segment gross margin, partially offset by a decrease in our segment SG&A.

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Depreciation, Amortization and Accretion

	Three Months Ended June 30,				Percent Increase (Decrease)		Six Months Ended June 30,				Percent Increase (Decrease)
	2016		2015				2016		2015
Depreciation, amortization and accretion	$	397,765	$	328,356	21	%	$	739,399	$	591,876	25	%

The increase in depreciation, amortization and accretion expense was primarily attributable to costs associated with the acquisition, lease or construction of new sites since the beginning of the prior-year period, which resulted in an increase in property and equipment and intangible assets subject to amortization.

Other Operating Expenses

	Three Months Ended June 30,				Percent Increase (Decrease)		Six Months Ended June 30,				Percent Increase (Decrease)
	2016		2015				2016		2015
Other operating expenses	$	13,711	$	17,449	(21	)%	$	22,511	$	25,223	(11	)%

The decrease in other operating expenses for the three months ended June 30, 2016 was primarily attributable to a net decrease of $3.2 million in losses on sales or disposals of assets and impairments and a net decrease of $0.6 million in integration, acquisition and merger related expenses.

The decrease in other operating expenses for the six months ended June 30, 2016 was primarily attributable to a net decrease of $1.7 million in losses on sales or disposals of assets and impairments and a net decrease of $1.0 million in integration, acquisition and merger related expenses.

Other Expense

	Three Months Ended June 30,				Percent Increase (Decrease)		Six Months Ended June 30,				Percent Increase (Decrease)
	2016		2015				2016		2015
Other expense	$	196,832	$	218,638	(10	)%	$	338,254	$	419,240	(19	)%

The decrease in other expense during the three and six months ended June 30, 2016 was primarily due to a gain on retirement of long-term obligations of $0.8 million attributable to the repayment of the Secured Tower Cellular Site Revenue Notes, Series 2012-1 Class A, compared to the three and six months ended June 30, 2015, where we recorded a loss of $74.3 million, as we redeemed the 7.000% senior notes due 2017.

For the three months ended June 30, 2016, the decrease was partially offset by:

• Incremental interest expense of $32.5 million, due to an increase in our annualized weighted-average cost of borrowing of 17 basis points and a $2.4 billion increase in our average debt outstanding; and

• Foreign currency losses of $28.1 million in the current period, compared to foreign currency gains of $1.1 million in the prior-year period.

For the six months ended June 30, 2016, the decrease was also attributable to foreign currency losses of $17.5 million in the current period, compared to foreign currency losses of $52.9 million in the prior-year period. The decrease was partially offset by incremental interest expense of $44.5 million due to an increase in our annualized weighted-average cost of borrowing of 11 basis points and a $2.5 billion increase in our average debt outstanding.

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Income Tax Provision

	Three Months Ended June 30,						Percent Increase (Decrease)		Six Months Ended June 30,						Percent Increase (Decrease)
	2016			2015					2016			2015
Income tax provision	$	43,510		$	13,956		212	%	$	72,634		$	37,828		92	%
Effective tax rate	18.4		%	8.2		%			13.3		%	9.7		%

As a real estate investment trust for U.S. tax purposes (“REIT”), we may deduct earnings distributed to stockholders against the income generated by our REIT operations. In addition, we are able to offset certain income by utilizing our net operating losses (“NOLs”), subject to specified limitations. Consequently, the effective tax rate on income from continuing operations for the three and six months ended June 30,2016 and 2015 differs from the federal statutory rate.

The increase in the income tax provision for the three and six months ended June 30, 2016 was due to an increase in foreign taxable earnings, largely due to the Viom Acquisition, as well as uncertain tax positions.

Net Income/Adjusted EBITDA and Net Income/NAREIT FFO/ Consolidated AFFO

	Three Months Ended June 30,						Percent Increase (Decrease)		Six Months Ended June 30,						Percent Increase (Decrease)
	2016			2015					2016			2015
Net income	$	192,464		$	157,180		22	%	$	473,771		$	352,672		34	%
Income tax provision	43,510			13,956			212		72,634			37,828			92
Other expense	25,842			2,129			1,114		13,634			56,632			(76	)
(Gain) loss on retirement of long-term obligations	(830		)	75,068			(101	)	(830		)	78,793			(101	)
Interest expense	181,036			148,507			22		340,916			296,441			15
Interest income	(6,468		)	(4,404		)	47		(10,002		)	(7,368		)	36
Other operating expenses	13,711			17,449			(21	)	22,511			25,223			(11	)
Depreciation, amortization and accretion	397,765			328,356			21		739,399			591,876			25
Stock-based compensation expense	21,907			24,045			(9	)	49,986			53,906			(7	)
Adjusted EBITDA	$	868,937		$	762,286		14	%	$	1,702,019		$	1,486,003		15	%

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	Three Months Ended June 30,						Percent Increase (Decrease)		Six Months Ended June 30,						Percent Increase (Decrease)
	2016			2015					2016			2015
Net income	$	192,464		$	157,180		22	%	$	473,771		$	352,672		34	%
Real estate related depreciation, amortization and accretion	360,333			291,183			24		657,846			520,011			27
Losses from sale or disposal of real estate and real estate related impairment charges	5,130			6,775			(24	)	9,732			10,456			(7	)
Dividends on preferred stock	(26,782		)	(26,782		)	—		(53,563		)	(36,601		)	46
Adjustments for unconsolidated affiliates and noncontrolling interests	(22,942		)	(5,856		)	292		(33,958		)	(13,082		)	160
NAREIT FFO attributable to American Tower Corporation common stockholders	$	508,203		$	422,500		20	%	$	1,053,828		$	833,456		26	%
Straight-line revenue	(35,236		)	(35,541		)	(1	)	(67,244		)	(69,379		)	(3	)
Straight-line expense	16,476			13,961			18		32,313			22,725			42
Stock-based compensation expense	21,907			24,045			(9	)	49,986			53,906			(7	)
Deferred portion of income tax	12,465			(1,241		)	(1,104	)	22,221			7,917			181
Non-real estate related depreciation, amortization and accretion	37,432			37,173			1		81,553			71,865			13
Amortization of deferred financing costs, capitalized interest, debt discounts and premiums and long-term deferred interest charges	4,417			5,297			(17	)	11,846			8,900			33
Other expense (1)	25,842			2,129			1,114		13,634			56,632			(76	)
(Gain) loss on retirement of long-term obligations	(830		)	75,068			(101	)	(830		)	78,793			(101	)
Other operating expenses (2)	8,581			10,674			(20	)	12,779			14,767			(13	)
Capital improvement capital expenditures	(25,753		)	(19,849		)	30		(42,477		)	(36,633		)	16
Corporate capital expenditures	(4,557		)	(3,225		)	41		(7,224		)	(5,537		)	30
Adjustments for unconsolidated affiliates and noncontrolling interests	22,942			5,856			292		33,958			13,082			160
Consolidated AFFO	$	591,889		$	536,847		10	%	$	1,194,343		$	1,050,494		14	%
Adjustments for unconsolidated affiliates and noncontrolling interests	(21,434		)	(12,591		)	70	%	(37,124		)	(25,661		)	45	%
AFFO attributable to American Tower Corporation common stockholders	$	570,455		$	524,256		9	%	$	1,157,219		$	1,024,833		13	%

_______________

(1) Primarily includes realized and unrealized (gains) losses on foreign currency exchange rate fluctuations.

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

Three Months Ended June 30, 2016

The increase in net income was primarily due to an increase in our operating profit and a reduction of $75.9 million in loss on retirement of long-term obligations, partially offset by increases in depreciation, amortization and accretion expense, interest expense and income tax provision.

The increase in Adjusted EBITDA was primarily attributable to the increase in our gross margin and was partially offset by an increase in SG&A of $24.2 million, excluding the impact of stock-based compensation expense.

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Consolidated AFFO and AFFO attributable to American Tower Corporation common stockholders growth was primarily attributable to the increase in our operating profit, partially offset by increases in interest and income tax, including adjustments.

Six Months Ended June 30, 2016

The increase in net income was primarily due to an increase in our operating profit, a reduction of $79.6 million in loss on retirement of long-term obligations and a decrease in other expense, partially offset by increases in depreciation, amortization and accretion expense, interest expense and income tax provision.

The increase in Adjusted EBITDA was primarily attributable to the increase in our gross margin and was partially offset by an increase in SG&A of $38.1 million, excluding the impact of stock-based compensation expense.

Consolidated AFFO and AFFO attributable to American Tower Corporation common stockholders growth was primarily attributable to the increase in our operating profit, partially offset by an increase in dividends on preferred stock, and increases in interest and income tax, including adjustments.

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Liquidity and Capital Resources

The information in this section updates as of June 30, 2016 the “Liquidity and Capital Resources” section of the 2015 Form 10-K and should be read in conjunction with that report.

Overview

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 thousands):

	June 30, 2016
Available under the 2013 Credit Facility	$	2,677,797
Available under the 2014 Credit Facility	160,000
Letters of credit	(10,624		)
Total available under credit facilities, net	2,827,173
Cash and cash equivalents	410,538
Total liquidity	$	3,237,711

Subsequent to June 30, 2016, we borrowed $110.0 million under our multicurrency senior unsecured revolving credit facility entered into in June 2013, as amended (the “2013 Credit Facility”).

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

	Six Months Ended June 30,
	2016			2015
Net cash provided by (used for):
Operating activities	$	1,311,316		$	1,036,460
Investing activities	(1,543,401		)	(6,079,440		)
Financing activities	330,259			4,990,217
Net effect of changes in foreign currency exchange rates on cash and cash equivalents	(8,322		)	13,973
Net increase (decrease) in cash and cash equivalents	$	89,852		$	(38,790	)

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

As of June 30, 2016, we had total outstanding indebtedness of $18.8 billion with a current portion of $314.1 million. During the six months ended June 30,2016, we generated sufficient cash flow from operations to fund our capital expenditures and debt service obligations, as well as our required distributions. We believe cash generated by operating activities during the year ending December 31, 2016, together with our borrowing capacity under our credit facilities, will be sufficient to fund our required distributions, capital expenditures, debt service obligations (interest and principal repayments) and signed acquisitions. As of June 30, 2016, we had $294.9 million of cash and cash equivalents held by our foreign subsidiaries, of which $113.0 million was held by our joint ventures and minority interest holders. 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 taxes.

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Cash Flows from Operating Activities

The increase in cash provided by operating activities for the six months ended June 30, 2016 was attributable to an increase in the operating profit of our property segments and a decrease in cash used for working capital items, partially offset by (i) higher cash paid for taxes and (ii) a decrease in distributions of restricted cash.

Cash Flows from Investing Activities

Our significant investing activities during the six months ended June 30,2016 are highlighted below:

•         We spent approximately $1.1 billion for the Viom Acquisition.

•         We spent $328.2 million for capital expenditures, as follows (in millions):

Discretionary capital projects (1)	$	108.1
Ground lease purchases	75.6
Capital improvements and corporate expenditures (2)	49.7
Redevelopment	52.2
Start-up capital projects	42.6
Total capital expenditures	$	328.2

_______________

(1) Includes the construction of 900 communications sites globally.

(2) Includes $8.7 million of capital lease payments included in Repayments of notes payable, credit facilities and capital leases in the cash flow from financing 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 taking into account the repayment of debt, as necessary, consistent with our long-term financial policies. Accordingly, we expect to continue to deploy our capital through our annual capital expenditure program, including land purchases and new site construction, and through acquisitions. We expect that our 2016 total capital expenditures, including expected capital expenditures related to ATC TIPL, will be between $700 million and $800 million, as follows (in millions):

Discretionary capital projects (1)	$	185	to	$	215
Ground lease purchases	140		to	160
Capital improvements and corporate expenditures	125		to	135
Redevelopment	165		to	185
Start-up capital projects	85		to	105
Total capital expenditures	$	700	to	$	800

_______________

(1)    Includes the construction of approximately 2,500 to 3,000 communications sites globally.

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Cash Flows from Financing Activities

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

	Six Months Ended June 30,
	2016		2015
Proceeds from issuance (repayments) of senior notes, net	2,237.5		1,492.3
(Repayments of) proceeds from credit facilities, net	(1,292.1	)	1,130.0
Distributions paid on common and preferred stock	(480.1	)	(360.9	)
Proceeds from the issuance of common stock, net	—		2,440.3
Proceeds from the issuance of preferred stock, net	—		1,337.9
Proceeds from term loan	—		500.0
Proceeds from issuance of securitized notes	—		875.0

Senior Notes Offerings

3.300% Senior Notes and 4.400% Senior Notes Offering. On January 12, 2016, we completed a registered public offering of $750.0 million aggregate principal amount of 3.300% senior unsecured notes due 2021 (the “3.300% Notes”) and $500.0 million aggregate principal amount of 4.400% senior unsecured notes due 2026 (the “4.400% Notes”). The net proceeds from this offering were approximately $1,237.2 million, after deducting commissions and estimated expenses. We used the proceeds to repay existing indebtedness under the 2013 Credit Facility and for general corporate purposes.

The 3.300% Notes will mature on February 15, 2021 and bear interest at a rate of 3.300% per annum. The 4.400% Notes will mature on February 15, 2026 and bear interest at a rate of 4.400% per annum. Accrued and unpaid interest on the notes will be payable in U.S. Dollars semi-annually in arrears on February 15 and August 15 of each year, beginning on August 15, 2016. Interest on the notes is computed on the basis of a 360-day year comprised of twelve 30-day months and commenced accruing on January 12, 2016.

3.375% Senior Notes Offering. On May 13, 2016, we completed a registered public offering of $1.0 billion aggregate principal amount of 3.375% senior unsecured notes due 2026 (the “3.375% Notes”). The net proceeds from this offering were approximately $981.5 million, after deducting commissions and estimated expenses. We used the proceeds to repay existing indebtedness under the 2013 Credit Facility.

The 3.375% Notes will mature on October 15, 2026 and bear interest at a rate of 3.375% per annum. Accrued and unpaid interest on the notes will be payable in U.S. Dollars semi-annually in arrears on April 15 and October 15 of each year, beginning on October 15, 2016. Interest on the notes is computed on the basis of a 360-day year comprised of twelve 30-day months and commenced accruing on May 13, 2016.

We may redeem each series of 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 3.300% Notes on or after January 15, 2021, the 4.400% Notes on or after November 15, 2025 or the 3.375% Notes on or after July 15, 2026, we will not be required to pay a make-whole premium. In addition, if we undergo a change of control and corresponding ratings decline, each as defined in the applicable supplemental indenture, we may be required to repurchase all of the applicable notes at a purchase price equal to 101% of the principal amount of such notes, plus accrued and unpaid interest (including additional interest, if any), up to but not including the repurchase date. The notes rank equally with all of our other senior unsecured debt and are structurally subordinated to all existing and future indebtedness and other obligations of our subsidiaries.

The supplemental indentures contain certain covenants that restrict our ability to merge, consolidate or sell assets and our (together with our subsidiaries’) ability to incur liens. These covenants are subject to a number of exceptions, including that we, and our subsidiaries, may incur certain liens on assets, mortgages or other liens securing indebtedness,

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if the aggregate amount of such liens does not exceed 3.5x Adjusted EBITDA, as defined in the applicable supplemental indenture.

Bank Facilities

2013 Credit Facility. During the six months ended June 30, 2016, we borrowed an aggregate of $1.2 billion, which included borrowings of 38.0 million Euro ($42.2 million) by one of our Germany subsidiaries, and repaid an aggregate of $2.4 billion of revolving indebtedness under the 2013 Credit Facility. We primarily used the borrowings to fund the Viom Acquisition. We currently have $3.2 of undrawn letters of credit and maintain the ability to draw down and repay amounts under the 2013 Credit Facility in the ordinary course.

2014 Credit Facility. During the six months ended June 30, 2016, we borrowed an aggregate of $80.0 million and repaid an aggregate of $220.0 million of revolving indebtedness under our senior unsecured revolving credit facility entered into in January 2012 and amended and restated in September 2014, as further amended (the “2014 Credit Facility”). We currently have $7.4 million of undrawn letters of credit and maintain the ability to draw down and repay amounts under the 2014 Credit Facility in the ordinary course.

Our unsecured term loan entered into in October 2013, as amended (the “Term Loan”), the 2013 Credit Facility and the 2014 Credit Facility do not require amortization of principal and may be paid prior to maturity in whole or in part at our option without penalty or premium. We have the option of choosing either a defined base rate or the London Interbank Offered Rate (“LIBOR”) as the applicable base rate for borrowings under the Term Loan, the 2013 Credit Facility and the 2014 Credit Facility. The interest rates range between 1.000% to 2.000% above LIBOR for LIBOR based borrowings or up to 1.000% above the defined base rate for base rate borrowings, in each case based upon our debt ratings. The margin over LIBOR for each of the Term Loan, the 2013 Credit Facility and the 2014 Credit Facility is 1.250%.

The 2013 Credit Facility and the 2014 Credit Facility are subject to two optional renewal periods. We must pay a quarterly commitment fee on the undrawn portion of the 2013 Credit Facility and the 2014 Credit Facility, ranging from 0.100% to 0.400% per annum, based upon our debt ratings, and is currently 0.150%.

The loan agreements for each of the Term Loan, the 2013 Credit Facility and the 2014 Credit Facility contain certain reporting, information, financial and operating covenants and other restrictions (including limitations on additional debt, guaranties, sales of assets and liens) with which we must comply. Failure to comply with the financial and operating covenants of the loan agreements could not only prevent us from being able to borrow additional funds under the revolving credit facilities, but may constitute a default, which could result in, among other things, the amounts outstanding, including all accrued interest and unpaid fees, becoming immediately due and payable.

Viom indebtedness. Amounts outstanding and key terms of the Viom indebtedness, primarily assumed by us in connection with the Viom Acquisition, consisted of the following as of June 30, 2016 (in millions):

	Amount Outstanding (INR)	Amount Outstanding (USD)		Interest Rate (Range)		Maturity Date (Range)
Term loans	39,745	$	588.6	8.75% - 11.20%		March 31, 2017 - November 30, 2024
Debenture	6,000	$	88.9	9.90	%	April 28, 2020
Working capital facilities	1,406	$	20.8	11.05% - 11.60%		October 23, 2016 - March 18, 2017

The Viom indebtedness includes several term loans, ranging from one to ten years, which are generally secured by the borrower’s short-term and long-term assets. The term loans bear interest at the bank’s Marginal Cost of Funds based Lending Rate or the bank’s base rate, plus spreads ranging from 1.00% to 1.55%. Interest rates on the term loans are fixed until certain annual reset dates. Generally, the term loans can be repaid without penalty on the annual reset dates; earlier repayments require notice to the lenders and are subject to prepayment penalties, typically of 1% to 2%. Scheduled repayment terms include either ratable or staggered amortization with repayments typically commencing between six and 36 months after the initial disbursement of funds. Included in the term loans is a new short-term

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committed loan facility with a borrowing capacity of 5.80 billion INR ($85.9 million as of June 30, 2016), which was entered into by ATC TIPL in June 2016. We used 4.75 billion INR ($70.3 million as of June 30, 2016) of this new short-term committed loan facility to refinance a Viom term loan.

The debentureis secured by the borrower’s long-term assets, including property and equipment and intangible assets. The debenture bears interest at a base rate plus a spread of 0.6%. The base rate is set in advance for each quarterly coupon period. Should the actual base rate be less than 10.25% or greater than 9.75%, the revised base rate is assumed to be 10.00% for purposes of the reset. Additionally, the spread is subject to reset 36 and 48 months from the issuance date of April 27, 2015. The holders of the debenture must reach a consensus on the revised spread and the borrower must redeem all of the debentures held by holders from whom consensus is not achieved. Additionally, the debenture is required to be redeemed by the borrower if it does not maintain a minimum credit rating.

The Viom indebtedness includes several working capital facilities, most of which are subject to annual renewal, which are generally secured by the borrower’s short-term and long-term assets. The working capital facilities bear interest at rates that are comprised of base rates plus spreads ranging from 1.60% to 2.30%. Generally, the working capital facilities are payable on demand prior to maturity.

Viom preference shares. As of June 30, 2016, ATC TIPL had 166,666,666 mandatorily redeemable preference shares (the “Preference Shares”) outstanding, which are required to be redeemed in cash. Accordingly, we recognized debt of 1.67 billion INR ($24.7 million) related to the Preference Shares.

Unless redeemed earlier, the Preference Shares will be redeemed in two equal installments on March 26, 2017 and March 26, 2018 in an amount equal to ten INR per share along with a redemption premium, as defined in the investment agreement, which equates to a compounded return of 13.5% per annum. ATC TIPL, at its option, may redeem the Preference Shares prior to the aforementioned dates, subject to an additional 2% redemption premium.

Stock Repurchase Program. In March 2011, our Board of Directors approved a $1.5 billion stock repurchase program, pursuant to which we are authorized to repurchase up to an additional $1.1 billion of our common stock. Since September 2013, we have temporarily suspended repurchases under the program.

Sales of Equity Securities. We receive proceeds from sales of our equity securities pursuant to our employee stock purchase plan (“ESPP”) and upon exercise of stock options granted under our equity incentive plans. For the six months ended June 30, 2016, we received an aggregate of $60.4 million in proceeds upon exercises of stock options and ESPP.

Distributions. As a REIT, we must annually distribute to our stockholders an amount equal to at least 90% of our REIT taxable income (determined before the deduction for distributed earnings and excluding any net capital gain). Generally, we have distributed, and expect to continue to distribute, all or substantially all of our REIT taxable income after taking into consideration our utilization of NOLs. We have distributed an aggregate of approximately $2.7 billion to our common stockholders, including the dividend paid in July 2016, primarily subject to taxation as ordinary income.

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 domestic taxable REIT subsidiaries and other factors that our Board of Directors may deem relevant.

We have two series of preferred stock outstanding, 5.25% Mandatory Convertible Preferred Stock, Series A, par value $0.01 per share (the “Series A”), with a dividend rate of 5.25%, and 5.50% Mandatory Convertible Preferred Stock, Series B, par value $0.01 per share (the “Series B”), with a dividend rate of 5.50%. Dividends are payable quarterly in arrears, subject to declaration by our Board of Directors. During the six months ended June 30, 2016, we paid dividends of $2.625 per share, or $15.8 million, to Series A preferred stockholders of record and $27.50 per share, or $37.8 million, to Series B preferred stockholders of record.

In addition, in July 2016, we declared dividends of $1.3125 per share, or $7.9 million, payable on August 15, 2016 to Series A preferred stockholders of record at the close of business on August 1, 2016 and $13.75 per share, or $18.9

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million, payable on August 15, 2016 to Series B preferred stockholders of record at the close of business on August 1, 2016.

During the six months ended June 30, 2016, we paid $1.00 per share, or $424.2 million, to common stockholders of record. In addition, we declared a distribution of $0.53 per share, or $225.4 million, payable to our common stockholders of record at the close of business on June 17, 2016.

We accrue distributions on unvested restricted stock units, which are payable upon vesting. As of June 30,2016, the amount accrued for distributions payable related to unvested restricted stock units was $4.8 million. During the six months ended June 30, 2016, we paid $2.4 million of distributions upon the vesting of restricted stock units.

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Contractual Obligations. The following table summarizes our contractual obligations as of June 30, 2016 (in thousands):

Indebtedness			Balance Outstanding			Maturity Date
	American Tower subsidiary debt:
		Series 2013-1A securities (1)	$	500,000		March 15, 2018
		Series 2013-2A securities (2)	1,300,000			March 15, 2023
		Series 2015-1 notes (3)	350,000			June 15, 2020
		Series 2015-2 notes (4)	525,000			June 16, 2025
		2012 GTP notes (5)	175,240			March 15, 2019
		Unison notes (6)	196,000			Various
		Viom indebtedness (7)	698,274			Various
		Viom preference shares (8)	24,682			Various
		Shareholder loans (9)	154,387			Various
		BR Towers debentures (10)	105,191			October 15, 2023
		Colombian credit facility (11)	61,725			April 24, 2021
		South African facility (12)	50,725			December 17, 2020
		Brazil credit facility (13)	31,592			January 15, 2022
		Indian working capital facility (14)	5,688			July 31, 2016
	Total American Tower subsidiary debt		4,178,504
	American Tower Corporation debt:
		2013 Credit Facility	72,203			June 28, 2019
		Term Loan	2,000,000			January 29, 2021
		2014 Credit Facility	1,840,000			January 29, 2021
		4.500% senior notes	1,000,000			January 15, 2018
		3.40% senior notes	1,000,000			February 15, 2019
		7.25% senior notes	300,000			May 15, 2019
		2.800% senior notes	750,000			June 1, 2020
		5.050% senior notes	700,000			September 1, 2020
		3.300% senior notes	750,000			February 15, 2021
		3.450% senior notes	650,000			September 15, 2021
		5.900% senior notes	500,000			November 1, 2021
		4.70% senior notes	700,000			March 15, 2022
		3.50% senior notes	1,000,000			January 31, 2023
		5.00% senior notes	1,000,000			February 15, 2024
		4.000% senior notes	750,000			June 1, 2025
		4.400% senior notes	500,000			February 15, 2026
		3.375% senior notes	1,000,000			October 15, 2026
	Total American Tower Corporation debt		14,512,203
	Other debt, including capital lease obligations		121,793
	Total obligations		18,812,500
	Discounts, premiums and debt issuance costs		(95,424		)
	Total carrying value of obligations		$	18,717,076

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(1)    Maturity date represents anticipated repayment date; final legal maturity is March 15, 2043.

(2)    Maturity date represents anticipated repayment date; final legal maturity is March 15, 2048.

(3)    Maturity date represents anticipated repayment date; final legal maturity is June 15, 2045.

(4)    Maturity date represents anticipated repayment date; final legal maturity is June 15, 2050.

(5) Secured debt assumed by us in connection with our acquisition of MIP Tower Holdings LLC. Maturity date represents anticipated repayment date; final legal maturity is March 15, 2042. During the six months ended June 30, 2016, we repaid $94.1 million outstanding under the Secured Tower Cellular Site Revenue Notes, Series 2012-1 Class A and released 472 sites in connection with the repayment.

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(6) Secured debt assumed by us in connection with our acquisition of certain legal entities from Unison Holdings LLC and Unison Site Management II, L.L.C. Anticipated repayment dates begin April 15, 2017; final legal maturity date is April 15, 2040.

(7) Debt primarily assumed by the Company in connection with the Viom Acquisition. Maturity dates begin March 31, 2017. In June 2016, the Company refinanced INR 4.75 billion of Viom assumed indebtedness with a new short-term committed loan facility with a borrowing capacity of INR 5.80 billion ($85.9 million as of June 30, 2016). Denominated in INR.

(8) Mandatorily redeemable preference shares issued by Viom. The shares are to be redeemed in equal parts on March 26, 2017 and March 26, 2018.

(9) Reflects balances owed to our joint venture partners in Ghana and Uganda. The Ghana loan is denominated in GHS and the Uganda loan is denominated in U.S. Dollars.

(10) Publicly issued debentures assumed by us in connection with our acquisition of BR Towers S.A. Denominated in BRL.

(11) Denominated in COP and amortizes through April 24, 2021.

(12) Denominated in ZAR and amortizes through December 17, 2020.

(13) Denominated in BRL.

(14) Denominated in INR. This agreement provides that the maturity date may be extended for additional 30-day periods.

Additional information regarding our contractual debt obligations is set forth under the caption “Quantitative and Qualitative Disclosures about Market Risk” in Part I, Item 3 of this Quarterly Report on Form 10-Q.

Factors Affecting Sources of Liquidity

As discussed in the “Liquidity and Capital Resources” section of the 2015 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 those of our material debt agreements with covenants with respect to which our compliance 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 2014 Credit Facility, the 2013 Credit Facility and the 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. In the event that our debt ratings fall below investment grade, we must maintain an interest coverage ratio of Adjusted EBITDA to Interest Expense (each as defined in the applicable loan agreement) of at least 2.50:1.00. As of June 30, 2016, we were in compliance with each of these covenants.

		Compliance Tests For 12 Months Ended June 30, 2016 ($ 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	~ $2.6	~ $0.4
Consolidated Senior Secured Leverage Ratio	Senior Secured Debt to Adjusted EBITDA ≤ 3.00:1.00	~ $6.5 (4)	~ $2.2 (4)

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(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, the capacity 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 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

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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 2013 Securitization. The indenture and related supplemental indentures (collectively, the “2015 Indenture”) governing the American Tower Secured Revenue Notes, Series 2015-1, Class A (the “Series 2015-1 Notes”) and the American Tower Secured Revenue Notes, Series 2015-2, Class A (the “Series 2015-2 Notes,” and, together with the Series 2015-1 Notes, the “2015 Notes”) issued by GTP Acquisition Partners I, LLC (“GTP Acquisition Partners”) in a private securitization transaction in May 2015 (the “2015 Securitization”) and the loan agreement related to the securitization transaction completed in March 2013 (the “2013 Securitization”) include certain financial ratios and operating covenants and other restrictions customary for transactions subject to rated securitizations. Among other things, American Tower Asset Sub, LLC and American Tower Asset Sub II, LLC (together, the “AMT Asset Subs”) and GTP Acquisition Partners 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 agreement).

Under the agreements, amounts due will be paid from the cash flows generated by the assets securing the 2015 Notes or the assets securing the nonrecourse loan that secures the Secured Tower Revenue Securities, Series 2013-1A and Series 2013-2A issued in the 2013 Securitization (the “Loan”), as applicable, which must be deposited into certain reserve accounts, and thereafter distributed, solely pursuant to the terms of the applicable agreement. On a monthly basis, after payment of all required amounts under the applicable agreement, subject to the conditions described in the table below, the excess cash flows generated from the operation of such assets are released to GTP Acquisition Partners or the AMT Asset Subs, as applicable, which can then be distributed to, and used by, us. As of June 30, 2016, $97.6 million held in such reserve accounts was classified as restricted cash.

Certain information with respect to the 2015 Securitization and the 2013 Securitization is set forth below ($ in millions). 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 2015 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 Six Months Ended June 30, 2016	DSCR as of June 30, 2016	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
2015 Securitization	GTP Acquisition Partners	American Tower Secured Revenue Notes, Series 2015-1 and Series 2015-2	1.30x, Tested Quarterly (2)	(3)(4)	$90.7	7.74x	$172.0	$176.0
2013 Securitization	AMT Asset Subs	Secured Tower Revenue Securities, Series 2013-1A and Series 2013-2A	1.30x, Tested Quarterly (2)	(3)(5)	$294.9	11.37x	$483.8	$491.0

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(1) Based on the net cash flow of the applicable issuer or borrower as of June 30, 2016 and the expenses payable over the next 12 months on the 2015 Notes or the Loan, as applicable.

(2) Once triggered, a Cash Trap DSCR condition continues to exist until the DSCR exceeds the Cash Trap DSCR for two consecutive calendar quarters.

(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, meet REIT distribution requirements and make preferred stock dividend payments. During an “amortization period”, all excess cash flow and any amounts then in the reserve accounts because the DSCR was equal to or below the Cash Trap DSCR would be applied to pay principal of the 2015 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 any series of the 2015 Notes or subclass of Loan from and after the anticipated repayment date at a per annum rate determined in accordance with the applicable agreement. With respect to the 2015 Notes, upon the occurrence and during an event of default, the applicable trustee may, in its discretion or at the direction of holders of more than 50% of the aggregate outstanding principal of any series of the 2015 Notes, declare such series of 2015 Notes immediately due and payable, in which case any excess cash flow would need to be used to pay holders of such notes. Furthermore, if GTP Acquisition Partners or the AMT Asset Subs were to default on a series of the 2015 Notes or the Loan, the applicable trustee may seek to foreclose upon or otherwise convert the ownership of all or any portion of the 3,603 communications sites that secure the 2015 Notes or the 5,186 wireless and broadcast towers that secure the Loan, respectively, in which case we could lose such sites and the revenue associated with those assets.

As discussed above, we use our available liquidity and seek new sources of liquidity to repay or repurchase our outstanding indebtedness. In addition, in order to fund capital expenditures, future growth and expansion initiatives and satisfy our distribution requirements, we may need to raise additional capital through financing activities. 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. 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, pay preferred stock dividends 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 2015 Form 10-K, we derive a substantial portion of our revenues from a small number of tenants and, consequently, a failure by a significant tenant to satisfy its contractual obligations to us could adversely affect our cash flow and liquidity.

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For more information regarding the terms of our outstanding indebtedness, please see note 8 to our consolidated financial statements included in the 2015 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, asset retirement obligations, revenue recognition, rent expense, stock-based compensation, income taxes and accounting for business combinations and acquisitions of assets, which we discussed in the 2015 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 six months ended June 30, 2016. We have made no material changes to the critical accounting policies described in the 2015 Form 10-K.

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 on Form 10-Q.

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ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate Risk

As of June 30, 2016, we have one interest rate swap agreement in Colombia. The interest rate swap agreement has been designated as a cash flow hedge, has a notional amount of $30.9 million, an interest rate of 5.74% and expires in April 2021.

Changes in interest rates can cause interest charges to fluctuate on our variable rate debt. Variable rate debt as of June 30, 2016 was comprised of $1,840.0 million under the 2014 Credit Facility, $72.2 million under the 2013 Credit Facility, $2,000.0 million under the Term Loan, $50.7 million under the South African facility, $30.9 million under the Colombian credit facility after giving effect to our interest rate swap agreement, $105.2 million under the BR Towers debentures and $31.6 million under the Brazil credit facility. A 10% increase in current interest rates would result in an additional $4.3 million of interest expense for the six months ended June 30, 2016.

Foreign Currency Risk

We are exposed to market risk from changes in foreign currency exchange rates primarily in connection with our foreign subsidiaries and joint ventures internationally. Any transaction denominated in a currency other than the U.S. Dollar is reported in U.S. Dollars at the applicable exchange rate. All assets and liabilities are translated into U.S. Dollars at exchange rates in effect at the end of the applicable fiscal reporting period and all revenues and expenses are translated at average rates for the period. The cumulative translation effect is included in equity as a component of Accumulated other comprehensive loss. We may enter into additional foreign currency financial instruments in anticipation of future transactions to minimize the impact of foreign currency fluctuations. For the six months ended June 30, 2016, 37% of our revenues and 42% of our total operating expenses were denominated in foreign currencies.

As of June 30, 2016, 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 $37.2 million of unrealized losses that would be included in Other expense in our consolidated statements of operations for the six months ended June 30, 2016.

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 on Form 10-Q. Based on this evaluation, our principal executive officer and principal financial officer concluded that these disclosure controls and procedures were effective as of June 30, 2016 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 three months ended June 30, 2016 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 discussed in Item 1A of the 2015 Form 10-K.

ITEM 6. EXHIBITS

See Page Ex-1 of this Quarterly Report on Form 10-Q, which is incorporated herein by reference.

55

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: July 28, 2016	By:	/S/   THOMAS A. BARTLETT
		Thomas A. Bartlett Executive Vice President and Chief Financial Officer (Duly Authorized Officer and Principal Financial Officer)

56

EXHIBIT INDEX
Exhibit No.	Description of Document
4.1	Supplemental Indenture No. 5, dated as of May 13, 2016, to Indenture dated as of May 23, 2013, by and between the Company and U.S. Bank National Association, as trustee, for the 3.375% Senior Notes due 2026 (filed as Exhibit 4.1 to the Company’s Current Report on Form 8-K on May 13, 2016, and incorporated herein by reference)
12	Statement Regarding Computation of Ratio of Earnings to Fixed Charges and Ratio of Earnings to Combined Fixed Charges and Preferred Stock Dividends
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32	Certifications filed pursuant to 18. U.S.C. Section 1350
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition

EX-1

EX-12

Exhibit 12

AMERICAN TOWER CORPORATION

STATEMENT REGARDING COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

AND RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS

The following table reflects the computation of the ratio of earnings to fixed charges and ratio of earnings to combined fixed charges and preferred stock dividends for the periods presented (in thousands):

											Six months ended June 30,
	2011		2012		2013		2014		2015		2016
Computation of Earnings:
Income from continuing operations before income taxes and income on equity method investments	$	506,895	$	701,294	$	541,749	$	865,704	$	829,962	$	546,405
Add:
Interest expense (1)	313,328		403,150		459,779		581,716		596,769		341,483
Operating leases	109,817		125,706		148,573		196,491		241,430		139,635
Amortization of interest capitalized	2,218		2,315		2,406		2,547		2,638		1,339
Earnings as adjusted	932,258		1,232,465		1,152,507		1,646,458		1,670,799		1,028,862
Computation of fixed charges and combined fixed charges and preferred stock dividends:
Interest expense (1)	313,328		403,150		459,779		581,716		596,769		341,483
Interest capitalized	2,096		1,926		1,817		2,822		1,831		793
Operating leases	109,817		125,706		148,573		196,491		241,430		139,635
Fixed charges	425,241		530,782		610,169		781,029		840,030		481,911
Dividends on preferred stock	—		—		—		23,888		90,163		53,563
Combined fixed charges and preferred stock dividends	425,241		530,782		610,169		804,917		930,193		535,474
Excess in earnings required to cover fixed charges	$	507,017	$	701,683	$	542,338	$	865,429	$	830,769	$	546,951
Ratio of earnings to fixed charges (2)	2.19		2.32		1.89		2.11		1.99		2.13
Excess in earnings required to cover combined fixed charges and preferred stock dividends	$	507,017	$	701,683	$	542,338	$	841,541	$	740,606	$	493,388
Ratio of earnings to combined fixed charges and preferred stock dividends	2.19		2.32		1.89		2.05		1.80		1.92

_______________

(1) Interest expense includes amortization of deferred financing costs. Interest expense also includes an amount related to our capital lease with TV Azteca.

(2) For the purposes of this calculation, “earnings” consists of income from continuing operations before income taxes and income on equity method investments, as well as fixed charges (excluding interest capitalized and amortization of interest capitalized). “Fixed charges” consists of interest expensed and capitalized, amortization of debt discounts, premiums and related issuance costs and the component of rental expense associated with operating leases believed by management to be representative of the interest factor thereon.

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO SECTION 302 OF THE

SARBANES-OXLEY ACT OF 2002

I, James D. Taiclet, Jr., 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: July 28, 2016	By:	/S/    JAMES D. TAICLET, JR.
		James D. Taiclet, Jr.
		Chairman, 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, 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: July 28, 2016	By:	/S/    THOMAS A. BARTLETT
		Thomas A. Bartlett
		Executive Vice President and Chief Financial Officer

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 June 30, 2016, 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: July 28, 2016	By:	/S/    JAMES D. TAICLET, JR.
		James D. Taiclet, Jr.
		Chairman, President and Chief Executive Officer
Date: July 28, 2016	By:	/S/    THOMAS A. BARTLETT
		Thomas A. Bartlett
		Executive Vice President and Chief Financial Officer

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

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 21, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	AMERICAN TOWER CORP /MA/
Entity Central Index Key	0001053507
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		425,489,212

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
CURRENT ASSETS:
Cash and cash equivalents	$ 410,538	$ 320,686
Restricted cash	142,761	142,193
Accounts receivable, net	285,422	227,354
Prepaid and other current assets	481,879	306,235
Total current assets	1,320,600	996,468
PROPERTY AND EQUIPMENT, net	10,575,425	9,866,424
GOODWILL	4,981,919	4,091,805
OTHER INTANGIBLE ASSETS, net	11,590,692	9,837,876
DEFERRED INCOME TAXES	229,273	212,041
DEFERRED RENT ASSET	1,233,002	1,166,755
NOTES RECEIVABLE AND OTHER NON-CURRENT ASSETS	809,287	732,903
TOTAL	30,740,198	26,904,272
CURRENT LIABILITIES:
Accounts payable	120,586	96,714
Accrued expenses	617,711	516,413
Distributions payable	227,594	210,027
Accrued interest	151,365	115,672
Current portion of long-term obligations	314,063	50,202
Unearned revenue	224,312	211,001
Total current liabilities	1,655,631	1,200,029
LONG-TERM OBLIGATIONS	18,403,013	17,068,807
ASSET RETIREMENT OBLIGATIONS	951,803	856,936
DEFERRED TAX LIABILITY	745,936	106,333
OTHER NON-CURRENT LIABILITIES	1,058,433	959,349
Total liabilities	22,814,816	20,191,454
COMMITMENTS AND CONTINGENCIES
REDEEMABLE NONCONTROLLING INTERESTS	1,085,157	0
EQUITY:
Common stock: $.01 par value; 1,000,000,000 shares authorized; 428,071,284 and 426,695,279 shares issued; and 425,261,258 and 423,885,253 shares outstanding, respectively	4,280	4,267
Additional paid-in capital	9,781,223	9,690,609
Distributions in excess of earnings	(1,033,324)	(998,535)
Accumulated other comprehensive loss	(1,770,998)	(1,836,996)
Treasury stock (2,810,026 shares at cost)	(207,740)	(207,740)
Total American Tower Corporation equity	6,773,515	6,651,679
Noncontrolling interests	66,710	61,139
Total equity	6,840,225	6,712,818
TOTAL	30,740,198	26,904,272
Preferred Stock | Convertible Preferred Stock Subject to Mandatory Redemption | Series A Preferred Stock
EQUITY:
Preferred stock: $.01 par value: 20,000,000 authorized: 5.25%, Series A, 6,000,000 shares issued and outstanding; aggregate liquidation value of $600,000 - 5.50% Series B, 1,375,000 shares issued and outstanding, respectively; aggregate liquidation value of $1,375,000	60	60
Total equity	60	60
Preferred Stock | Convertible Preferred Stock Subject to Mandatory Redemption | Series B Preferred Stock
EQUITY:
Preferred stock: $.01 par value: 20,000,000 authorized: 5.25%, Series A, 6,000,000 shares issued and outstanding; aggregate liquidation value of $600,000 - 5.50% Series B, 1,375,000 shares issued and outstanding, respectively; aggregate liquidation value of $1,375,000	14	14
Total equity	$ 14	$ 14

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	428,071,284	426,695,279
Common stock, shares outstanding	425,261,258	423,885,253
Treasury stock, shares	2,810,026	2,810,026
Preferred Stock | Convertible Preferred Stock Subject to Mandatory Redemption
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred Stock | Convertible Preferred Stock Subject to Mandatory Redemption | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, dividend rate percentage (in percent)	5.25%	5.25%
Preferred stock, shares issued	6,000,000	6,000,000
Preferred stock, shares outstanding	6,000,000	6,000,000
Preferred stock, aggregate liquidation value (in dollars)	$ 600,000	$ 600,000
Preferred Stock | Convertible Preferred Stock Subject to Mandatory Redemption | Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, dividend rate percentage (in percent)	5.50%	5.50%
Preferred stock, shares issued	1,375,000	1,375,000
Preferred stock, shares outstanding	1,375,000	1,375,000
Preferred stock, aggregate liquidation value (in dollars)	$ 1,375,000	$ 1,375,000

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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
REVENUES:
Property	$ 1,426,192	$ 1,154,235	$ 2,693,843	$ 2,216,415
Services	16,035	20,140	37,431	37,150
Total operating revenues	1,442,227	1,174,375	2,731,274	2,253,565
OPERATING EXPENSES:
Property (including stock-based compensation expense of $392, $390, $899 and $822, respectively)	452,571	314,285	794,861	573,542
Services (including stock-based compensation expense of $255, $98, $406 and $237, respectively)	7,140	8,173	16,295	13,556
Depreciation, amortization and accretion	397,765	328,356	739,399	591,876
Selling, general, administrative and development expense (including stock-based compensation expense of $21,260, $23,557, $48,681 and $52,847, respectively)	138,234	116,338	273,549	239,628
Other operating expenses	13,711	17,449	22,511	25,223
Total operating expenses	1,009,421	784,601	1,846,615	1,443,825
OPERATING INCOME	432,806	389,774	884,659	809,740
OTHER INCOME (EXPENSE):
Gain (loss) on retirement of long-term obligations	830	(75,068)	830	(78,793)
Other expense (including unrealized foreign currency (losses) gains of ($24,585), $25,461, $4,777 and ($30,007), respectively)	(25,842)	(2,129)	(13,634)	(56,632)
Total other expense	(196,832)	(218,638)	(338,254)	(419,240)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	235,974	171,136	546,405	390,500
Income tax provision	(43,510)	(13,956)	(72,634)	(37,828)
NET INCOME	192,464	157,180	473,771	352,672
Net income attributable to noncontrolling interests	(4,914)	(1,124)	(11,062)	(3,299)
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION STOCKHOLDERS	187,550	156,056	462,709	349,373
Dividends on preferred stock	(26,782)	(26,782)	(53,563)	(36,601)
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS	$ 160,768	$ 129,274	$ 409,146	$ 312,772
NET INCOME PER COMMON SHARE AMOUNTS:
Basic net income attributable to American Tower Corporation common stockholders per common share (in dollars per share)	$ 0.38	$ 0.31	$ 0.96	$ 0.76
Diluted net income attributable to American Tower Corporation common stockholders per common share (in dollars per share)	$ 0.37	$ 0.30	$ 0.95	$ 0.75
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
BASIC (in shares)	424,909	423,154	424,484	414,182
DILUTED (in shares)	429,004	426,933	428,529	418,303
DISTRIBUTIONS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.53	$ 0.44	$ 1.04	$ 0.86
TV Azteca
OTHER INCOME (EXPENSE):
Interest income, TV Azteca, net of interest expense of $284, $370, $567 and $740, respectively	$ 2,748	$ 2,662	$ 5,464	$ 5,258
Interest expense	(284)	(370)	(567)	(740)
Excluding TV Azteca
OTHER INCOME (EXPENSE):
Interest income	6,468	4,404	10,002	7,368
Interest expense	$ (181,036)	$ (148,507)	$ (340,916)	$ (296,441)

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CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Stock-based compensation expense	$ 21,907	$ 24,045	$ 49,986	$ 53,906
TV Azteca
Interest expense	284	370	567	740
Property
Stock-based compensation expense	392	390	899	822
Services
Stock-based compensation expense	255	98	406	237
Selling General Administrative And Development Expense
Stock-based compensation expense	21,260	23,557	48,681	52,847
Other Expense
Unrealized foreign currency (losses) gains	$ (24,585)	$ 25,461	$ 4,777	$ (30,007)

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 192,464	$ 157,180	$ 473,771	$ 352,672
Other comprehensive (loss) income:
Changes in fair value of cash flow hedges, net of tax benefit (expense) of $0, ($42), $0 and $9, respectively	(9)	597	65	(345)
Reclassification of unrealized (gains) losses on cash flow hedges to net income, net of tax benefit of $0, $22, $0 and $46, respectively	(57)	2,226	(65)	2,613
Foreign currency translation adjustments, net of tax expense (benefit) of $2,695, $197, $6,883 and ($12,412), respectively	(177,966)	(44,029)	48,326	(476,990)
Other comprehensive (loss) income	(178,032)	(41,206)	48,326	(474,722)
Comprehensive income (loss)	14,432	115,974	522,097	(122,050)
Comprehensive loss attributable to noncontrolling interests	12,712	17,421	6,610	37,123
Comprehensive income (loss) attributable to American Tower Corporation stockholders	$ 27,144	$ 133,395	$ 528,707	$ (84,927)

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net change in fair value of cash flow hedges, tax benefit (expense)	$ 0	$ (42)	$ 0	$ 9
Reclassification of unrealized losses on cash flow hedges to net income, tax benefit	0	22	0	46
Foreign currency translation adjustments, tax expense (benefit)	$ 2,695	$ 197	$ 6,883	$ (12,412)

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 473,771	$ 352,672
Adjustments to reconcile net income to cash provided by operating activities
Depreciation, amortization and accretion	739,399	591,876
Stock-based compensation expense	49,986	53,906
(Gain) loss on early retirement of long-term obligations	(830)	78,793
Other non-cash items reflected in statements of operations	53,464	75,531
Decrease in restricted cash	12,170	26,804
Increase in net deferred rent asset	(34,931)	(46,653)
Increase in assets	(32,984)	(99,179)
Increase in liabilities	51,271	2,710
Cash provided by operating activities	1,311,316	1,036,460
CASH FLOWS FROM INVESTING ACTIVITIES
Payments for purchase of property and equipment and construction activities	(319,427)	(311,122)
Payments for acquisitions, net of cash acquired	(1,216,467)	(670,246)
Payment for Verizon transaction	(4,748)	(5,060,416)
Proceeds from sale of short-term investments and other non-current assets	2,601	781,469
Payments for short-term investments	0	(816,038)
Deposits, restricted cash, investments and other	(5,360)	(3,087)
Cash used for investing activities	(1,543,401)	(6,079,440)
CASH FLOW FROM FINANCING ACTIVITIES
Repayments of short-term borrowings, net	(2,843)	0
Borrowings under credit facilities	1,326,866	4,740,308
Proceeds from issuance of senior notes, net	2,237,503	1,492,298
Proceeds from term loan	0	500,000
Proceeds from other borrowings	70,806	0
Proceeds from issuance of securities in securitization transaction, net	0	875,000
Repayments of notes payable, credit facilities and capital leases	(2,858,415)	(5,931,401)
Distributions to noncontrolling interest holders, net	(503)	(383)
Proceeds from stock options and ESPP	60,361	17,364
Distributions paid on common stock	(426,564)	(329,766)
Distributions paid on preferred stock	(53,563)	(31,085)
Proceeds from the issuance of common stock, net	0	2,440,327
Proceeds from the issuance of preferred stock, net	0	1,337,946
Payment for early retirement of long-term obligations	(125)	(86,107)
Deferred financing costs and other financing activities	(23,264)	(34,284)
Cash provided by financing activities	330,259	4,990,217
Net effect of changes in foreign currency exchange rates on cash and cash equivalents	(8,322)	13,973
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	89,852	(38,790)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	320,686	313,492
CASH AND CASH EQUIVALENTS, END OF PERIOD	410,538	274,702
Supplemental Cash Flow Elements [Abstract]
CASH PAID FOR INCOME TAXES (NET OF REFUNDS OF $14,011 AND $3,311, RESPECTIVELY)	50,413	29,911
CASH PAID FOR INTEREST	288,880	291,103
Decrease in accounts payable and accrued expenses for purchases of property and equipment and construction activities	(36,083)	(20,632)
Purchases of property and equipment under capital leases	21,651	10,510
Settlement of accounts receivable related to acquisitions	$ 0	$ 735

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Statement of Cash Flows [Abstract]
Income tax refunds	$ 14,011	$ 3,311

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CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Distributions in Excess of Earnings	Noncontrolling Interest	AOCI Attributable to Noncontrolling Interest [Member]	Series A Preferred Stock Convertible Preferred Stock Subject to Mandatory Redemption Preferred Stock	Series B Preferred Stock Convertible Preferred Stock Subject to Mandatory Redemption	Series B Preferred Stock Convertible Preferred Stock Subject to Mandatory Redemption Preferred Stock	Series B Preferred Stock Convertible Preferred Stock Subject to Mandatory Redemption Additional Paid-in Capital	Common Class A	Common Class A Common Stock	Common Class A Additional Paid-in Capital
BALANCE at Dec. 31, 2014	$ 4,053,352	$ 3,995	$ (207,740)	$ 5,788,786	$ (794,221)	$ (837,320)	$ 99,792		$ 60		$ 0
BALANCE (shares) at Dec. 31, 2014		399,508,751	(2,810,026)						6,000,000		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity	49,161	$ 6		49,155
Stock based compensation related activity (shares)		672,300
Issuance of common stock	3,465			3,465
Issuance of common stock (shares)		43,940
Issuance of stock										$ 1,337,946	$ 14	$ 1,337,932	$ 2,440,327	$ 259	$ 2,440,068
Issuance of stock (shares)											1,375,000			25,850,000
Changes in fair value of cash flow hedges, net of tax	(345)				(340)		(5)
Reclassification of unrealized gains on cash flow hedges to net income	2,613				2,583		30
Foreign currency translation adjustment, net of tax	(476,990)				(436,543)		(40,447)
Contributions from noncontrolling interest holders	51						51
Distributions to noncontrolling interest holders	(434)						(434)
Common stock dividends/distributions declared	(365,450)					(365,450)
Preferred stock dividends declared	(23,210)					(23,210)
Net income	352,672					349,373	3,299
BALANCE at Jun. 30, 2015	7,373,158	$ 4,260	$ (207,740)	9,619,406	(1,228,521)	(876,607)	62,286		$ 60		$ 14
BALANCE (shares) at Jun. 30, 2015		426,074,991	(2,810,026)						6,000,000		1,375,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	352,672
BALANCE at Dec. 31, 2015	6,712,818	$ 4,267	$ (207,740)	9,690,609	(1,836,996)	(998,535)	61,139		$ 60		$ 14
BALANCE (shares) at Dec. 31, 2015		426,695,279	(2,810,026)						6,000,000		1,375,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation related activity	86,780	$ 13		86,767
Stock based compensation related activity (shares)		1,331,272
Issuance of common stock	3,847			3,847
Issuance of common stock (shares)		44,733
Changes in fair value of cash flow hedges, net of tax	65				65
Reclassification of unrealized gains on cash flow hedges to net income	(65)				(65)
Foreign currency translation adjustment, net of tax	48,326				65,998		(665)	$ 65,333
Contributions from noncontrolling interest holders	13						13
Distributions to noncontrolling interest holders	(516)						(516)
Common stock dividends/distributions declared	(443,935)					(443,935)
Preferred stock dividends declared	(53,563)					(53,563)
Net income	473,771					462,709	6,739
BALANCE at Jun. 30, 2016	6,840,225	$ 4,280	$ (207,740)	$ 9,781,223	$ (1,770,998)	$ (1,033,324)	$ 66,710		$ 60		$ 14
BALANCE (shares) at Jun. 30, 2016		428,071,284	(2,810,026)						6,000,000		1,375,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest	$ 469,448

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DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

6 Months Ended

Jun. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

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

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

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

On April 21, 2016, the Company significantly expanded its Asia segment portfolio by acquiring a 51% controlling ownership interest in Viom Networks Limited (“Viom”), a telecommunications infrastructure company that owns and operates over 42,000 wireless communications towers and 200 indoor DAS networks in India (the “Viom Acquisition”). Subsequent to the closing, Viom was renamed ATC Telecom Infrastructure Private Limited (“ATC TIPL”).

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

The use of TRSs enables the Company to continue to engage in certain businesses while complying with REIT qualification requirements. The Company may, from time to time, change the election of previously designated TRSs to be included as part of the REIT. As of June 30, 2016, the Company’s REIT-qualified businesses included its U.S. tower leasing business, most of its operations in Costa Rica, Germany and Mexico and a majority of its services segment and indoor DAS networks business.

The accompanying consolidated and condensed consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission. The financial information included herein is unaudited. However, the Company believes that all adjustments 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, 2015 (the “2015 Form 10-K”). The results of operations for the three and six months ended June 30, 2016 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 or cost method, 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 June 30, 2016, the Company has a controlling interest in

two joint ventures in Ghana and Uganda with MTN Group Limited (“MTN Group”). The joint ventures are controlled by a holding company of which a wholly owned subsidiary of the Company holds a 51% interest and a wholly owned subsidiary of MTN Group holds a 49% interest. In addition, the Company holds an approximate 75% controlling interest in a subsidiary of the Company in South Africa and the South African investors hold an approximate 25% noncontrolling interest. The Company also holds a 51% controlling interest in ATC TIPL.

Significant Accounting Policies—The Company’s significant accounting policies are described in note 1 to the Company’s consolidated financial statements included in the 2015 Form 10-K. There have been no material changes to the Company’s significant accounting policies during the six months ended June 30, 2016.

Accounting Standards Updates—In May 2014, the Financial Accounting Standards Board (the “FASB”) issued new revenue recognition guidance, which requires an entity to recognize revenue in an amount that reflects the consideration to which the entity expects to be entitled in exchange for the transfer of promised goods or services to customers. The standard will replace most existing revenue recognition guidance and will become effective for the Company on January 1, 2018. Early adoption is permitted for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2016. The standard permits the use of either the retrospective or cumulative effect transition method. Leases are not included in the scope of this standard. The Company is evaluating the impact this standard will have on its financial statements.

In January 2016, the FASB issued new guidance on the recognition and measurement of financial assets and financial liabilities. The guidance amends certain aspects of recognition, measurement, presentation and disclosure of financial instruments. This standard is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2017. The Company does not expect the adoption of this guidance to have a material effect on its financial statements.

In February 2016, the FASB issued new guidance on the accounting for leases. The guidance amends the existing accounting standards for lease accounting, including the requirement that lessees recognize assets and liabilities for leases with terms greater than twelve months in the statement of financial position. Under the new guidance, lessor accounting is largely unchanged. This guidance is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018. The standard is required to be applied using a modified retrospective approach for all leases existing at, or entered into after, the beginning of the earliest comparative period presented. The Company is evaluating the impact this standard will have on its financial statements.

In March 2016, the FASB issued new guidance on the accounting for share-based payment transactions. The guidance amends the accounting for taxes related to stock-based compensation, including how excess tax benefits and a company’s payments for tax withholdings should be classified. This guidance is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2016. The Company early adopted this standard in the second quarter of 2016 and elected to account for forfeitures as they occur, effective January 1, 2016. The adoption of this guidance was not material to the Company’s consolidated financial statements. Additionally, the Company elected to apply the prospective transition method to the amendments related to the presentation of excess tax benefits in the statements of cash flows.

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PREPAID AND OTHER CURRENT ASSETS

6 Months Ended

Jun. 30, 2016

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 (in thousands):

	As of
	June 30, 2016		December 31, 2015
Prepaid income tax	$	151,828	$	45,056
Prepaid operating ground leases	132,629		128,542
Unbilled receivables	59,124		34,173
Prepaid assets	59,063		32,892
Value added tax and other consumption tax receivables	32,258		30,239
Other miscellaneous current assets	46,977		35,333
Total	$	481,879	$	306,235

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GOODWILL AND OTHER INTANGIBLE ASSETS

6 Months Ended

Jun. 30, 2016

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 the Company’s business segments were as follows (in thousands):

	Property										Services		Total
	U.S.		Asia (1)			EMEA			Latin America
Balance as of January 1, 2016	$	3,379,163	$	170,719		$	132,570		$	407,365	$	1,988	$	4,091,805
Additions	289		856,110			3,200			4,615		—		864,214
Effect of foreign currency translation	—		(16,714		)	(18,417		)	61,031		—		25,900
Balance as of June 30, 2016	$	3,379,452	$	1,010,115		$	117,353		$	473,011	$	1,988	$	4,981,919

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(1) Includes approximately $856.1 million of goodwill assumed in the Viom Acquisition (see note 13).

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

		As of June 30, 2016							As of December 31, 2015
	Estimated Useful Lives	Gross Carrying Value		Accumulated Amortization			Net Book Value		Gross Carrying Value		Accumulated Amortization			Net Book Value
	(years)	(in thousands)
Acquired network location intangibles (1)	Up to 20	$	4,589,425	$	(1,175,676	)	$	3,413,749	$	3,980,281	$	(1,052,393	)	$	2,927,888
Acquired customer-related intangibles	15-20	10,139,104		(1,996,896		)	8,142,208		8,640,554		(1,763,853		)	6,876,701
Acquired licenses and other intangibles	3-20	28,756		(3,725		)	25,031		28,293		(5,486		)	22,807
Economic Rights, TV Azteca	70	20,267		(10,563		)	9,704		21,688		(11,208		)	10,480
Total other intangible assets		$	14,777,552	$	(3,186,860	)	$	11,590,692	$	12,670,816	$	(2,832,940	)	$	9,837,876

_______________

(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 or up to 20 years, as the Company considers these intangibles to be directly related to the tower assets.

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

The Company amortizes its acquired network location intangibles and customer-related intangibles on a straight-line basis over their estimated useful lives. As of June 30, 2016, the remaining weighted average amortization period of the Company’s intangible assets, excluding the TV Azteca Economic Rights detailed in note 5 to the Company’s consolidated financial statements included in the 2015 Form 10-K, was 16 years. Amortization of intangible assets for the three and six months ended June 30, 2016 was $185.3 million and $337.1 million, respectively, and amortization of intangible assets for the three and six months ended June 30, 2015 was $147.6 million and $258.1 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 (in millions):

Fiscal Year
Remainder of 2016	$	356.6
2017	710.8
2018	708.6
2019	705.6
2020	686.8
2021	677.5

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ACCRUED EXPENSES

6 Months Ended

Jun. 30, 2016

Accrued Liabilities, Current [Abstract]

ACCRUED EXPENSES

ACCRUED EXPENSES

Accrued expenses consisted of the following (in thousands):

	As of
	June 30, 2016		December 31, 2015
Accrued property and real estate taxes	$	108,636	$	75,827
Accrued income tax payable	70,490		11,704
Payroll and related withholdings	52,844		62,334
Accrued rent	50,449		54,732
Accrued construction costs	16,550		19,857
Other accrued expenses	318,742		291,959
Total	$	617,711	$	516,413

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LONG-TERM OBLIGATIONS

6 Months Ended

Jun. 30, 2016

Long-term Debt, Excluding Current Maturities [Abstract]

LONG-TERM OBLIGATIONS

LONG-TERM OBLIGATIONS

Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums and debt issuance costs, consisted of the following (in thousands):

	As of
	June 30, 2016			December 31, 2015			Maturity Date
Series 2013-1A securities (1)	$	498,060		$	497,478		March 15, 2018
Series 2013-2A securities (2)	1,289,478			1,288,689			March 15, 2023
Series 2015-1 notes (3)	346,685			346,262			June 15, 2020
Series 2015-2 notes (4)	519,106			518,776			June 16, 2025
2012 GTP notes (5)	182,233			281,902			March 15, 2019
Unison notes (6)	201,054			201,930			Various
Viom indebtedness (7)	698,274			—			Various
Viom preference shares (8)	24,682			—			Various
Shareholder loans (9)	154,387			145,540			Various
BR Towers debentures (10)	105,191			85,219			October 15, 2023
Colombian credit facility (11)	61,060			59,640			April 24, 2021
South African facility (12)	50,230			53,175			December 17, 2020
Brazil credit facility (13)	31,293			21,868			January 15, 2022
Indian working capital facility (14)	5,688			8,752			July 31, 2016
Total American Tower subsidiary debt	4,167,421			3,509,231
2013 Credit Facility	72,203			1,225,000			June 28, 2019
Term Loan	1,994,238			1,993,601			January 29, 2021
2014 Credit Facility	1,840,000			1,980,000			January 29, 2021
4.500% senior notes	997,944			997,693			January 15, 2018
3.40% senior notes	999,532			999,769			February 15, 2019
7.25% senior notes	296,389			296,242			May 15, 2019
2.800% senior notes	744,239			743,557			June 1, 2020
5.050% senior notes	696,916			697,216			September 1, 2020
3.300% senior notes	744,121			—			February 15, 2021
3.450% senior notes	643,216			642,786			September 15, 2021
5.900% senior notes	497,037			497,188			November 1, 2021
4.70% senior notes	695,671			695,374			March 15, 2022
3.50% senior notes	988,231			987,966			January 31, 2023
5.00% senior notes	1,002,735			1,003,453			February 15, 2024
4.000% senior notes	739,539			739,057			June 1, 2025
4.400% senior notes	494,957			—			February 15, 2026
3.375% senior notes	982,645			—			October 15, 2026
Total American Tower Corporation debt	14,429,613			13,498,902
Other debt, including capital lease obligations	120,042			110,876
Total	18,717,076			17,119,009
Less current portion of long-term obligations	(314,063		)	(50,202		)
Long-term obligations	$	18,403,013		$	17,068,807

_______________

(1)    Maturity date represents anticipated repayment date; final legal maturity is March 15, 2043.

(2)    Maturity date represents anticipated repayment date; final legal maturity is March 15, 2048.

(3) Maturity date represents anticipated repayment date; final legal maturity is June 15, 2045.

(4) Maturity date represents anticipated repayment date; final legal maturity is June 15, 2050.

(5) Secured debt assumed by the Company in connection with its acquisition of MIP Tower Holdings LLC. Maturity date represents anticipated repayment date; final legal maturity is March 15, 2042. During the six months ended June 30, 2016, the Company repaid the $94.1 million outstanding under the Secured Tower Cellular Site Revenue Notes, Series 2012-1 Class A and released 472 sites in connection with the repayment.

(6) Secured debt assumed by the Company in connection with its acquisition of certain legal entities from Unison Holdings LLC and Unison Site Management II, L.L.C. Anticipated repayment dates begin April 15, 2017; final legal maturity date is April 15, 2040.

(7) Debt primarily assumed by the Company in connection with the Viom Acquisition. Maturity dates begin March 31, 2017. In June 2016, the Company refinanced 4.75 billion Indian Rupees (“INR”) of Viom assumed indebtedness with a new short-term committed loan facility with a borrowing capacity of 5.80 billion INR ($85.9 million as of June 30, 2016). Denominated in INR.

(8) Mandatorily redeemable preference shares issued by Viom. The shares are to be redeemed in equal parts on March 26, 2017 and March 26, 2018.

(9) Reflects balances owed to the Company’s joint venture partners in Ghana and Uganda. The Ghana loan is denominated in Ghanaian Cedi and the Uganda loan is denominated in U.S. Dollars.

(10) Publicly issued debentures assumed by the Company in connection with its acquisition of BR Towers S.A. Denominated in Brazilian Reais (“BRL”).

(11) Denominated in Colombian Pesos and amortizes through April 24, 2021.

(12) Denominated in South African Rand and amortizes through December 17, 2020.

(13) Denominated in BRL.

(14) Denominated in INR. This agreement provides that the maturity date may be extended for additional 30-day periods.

Current portion of long-term obligations—The Company’s current portion of long-term obligations includes (i)13.1 billion INR ($194.7 million) of indebtedness primarily assumed by the Company in connection with the Viom Acquisition, including 4.75 billion INR ($70.3 million) outstanding under a short-term committed loan facility which was used to refinance a Viom term loan, (ii) 0.8 billion INR ($12.3 million) related to Viom preference shares, and (iii) $67.4 million outstanding under the Secured Cellular Site Revenue Notes, Series 2010-1 Class C (included in the Unison notes) assumed in connection with the acquisition of Unison.

Viom indebtedness—Amounts outstanding and key terms of the Viom indebtedness consisted of the following as of June 30, 2016 (in millions):

	Amount Outstanding (INR)	Amount Outstanding (USD)		Interest Rate (Range)		Maturity Date (Range)
Term loans	39,745	$	588.6	8.75% - 11.20%		March 31, 2017 - November 30, 2024
Debenture	6,000	$	88.9	9.90	%	April 28, 2020
Working capital facilities	1,406	$	20.8	11.05% - 11.60%		October 23, 2016 - March 18, 2017

The Viom indebtedness includes several term loans, ranging from one to ten years, which are generally secured by the borrower’s short-term and long-term assets. The term loans bear interest at the bank’s Marginal Cost of Funds based Lending Rate or the bank’s base rate, plus spreads ranging from 1.00% to 1.55%. Interest rates on the term loans are fixed until certain annual reset dates. Generally, the term loans can be repaid without penalty on the annual reset dates; earlier repayments require notice to the lenders and are subject to prepayment penalties, typically of 1% to 2%. Scheduled repayment terms include either ratable or staggered amortization with repayments typically commencing between six and 36 months after the initial disbursement of funds.

The debentureis secured by the borrower’s long-term assets, including property and equipment and intangible assets. The debenture bears interest at a base rate plus a spread of 0.6%. The base rate is set in advance for each quarterly coupon period. Should the actual base rate be less than 10.25% or greater than 9.75%, the revised base rate is assumed to be 10.00% for purposes of the reset. Additionally, the spread is subject to reset 36 and 48 months from the issuance date of April 27, 2015. The holders of the debenture must reach a consensus on the revised spread and the borrower must redeem all of the debentures held by holders from whom consensus is not achieved. Additionally, the debenture is required to be redeemed by the borrower if it does not maintain a minimum credit rating.

The Viom indebtedness includes several working capital facilities, most of which are subject to annual renewal, which are generally secured by the borrower’s short-term and long-term assets. The working capital facilities bear interest at rates that are comprised of base rates plus spreads ranging from 1.60% to 2.30%. Generally, the working capital facilities are payable on demand prior to maturity.

Viom preference shares—As of June 30, 2016, ATC TIPL had 166,666,666 mandatorily redeemable preference shares (the “Preference Shares”) outstanding, which are required to be redeemed in cash. Accordingly, the Company recognized debt of 1.67 billion INR ($24.7 million) related to the Preference Shares outstanding on the consolidated balance sheet.

Unless redeemed earlier, the Preference Shares will be redeemed in two equal installments on March 26, 2017 and March 26, 2018 in an amount equal to ten INR per share along with a redemption premium, as defined in the investment agreement, which equates to a compounded return of 13.5% per annum. ATC TIPL, at its option, may redeem the Preference Shares prior to the aforementioned dates, subject to an additional 2% redemption premium.

Senior Notes Offerings

3.300% Senior Notes and 4.400% Senior Notes Offering—On January 12, 2016, the Company completed a registered public offering of $750.0 million aggregate principal amount of 3.300% senior unsecured notes due 2021 (the “3.300% Notes”) and $500.0 million aggregate principal amount of 4.400% senior unsecured notes due 2026 (the “4.400% Notes”). The net proceeds from this offering were approximately $1,237.2 million, after deducting commissions and estimated expenses. The Company used the proceeds to repay existing indebtedness under its multicurrency senior unsecured revolving credit facility entered into in June 2013, as amended (the “2013 Credit Facility”) and for general corporate purposes.

The 3.300% Notes will mature on February 15, 2021 and bear interest at a rate of 3.300% per annum. The 4.400% Notes will mature on February 15, 2026 and bear interest at a rate of 4.400% per annum. Accrued and unpaid interest on the notes will be payable in U.S. Dollars semi-annually in arrears on February 15 and August 15 of each year, beginning on August 15, 2016. Interest on the notes is computed on the basis of a 360-day year comprised of twelve 30-day months and commenced accruing on January 12, 2016.

3.375% Senior Notes Offering—On May 13, 2016, the Company completed a registered public offering of $1.0 billion aggregate principal amount of 3.375% senior unsecured notes due 2026 (the “3.375% Notes”). The net proceeds from this offering were approximately $981.5 million, after deducting commissions and estimated expenses. The Company used the proceeds to repay existing indebtedness under the 2013 Credit Facility.

The 3.375% Notes will mature on October 15, 2026 and bear interest at a rate of 3.375% per annum. Accrued and unpaid interest on the notes will be payable in U.S. Dollars semi-annually in arrears on April 15 and October 15 of each year, beginning on October 15, 2016. Interest on the notes is computed on the basis of a 360-day year comprised of twelve 30-day months and commenced accruing on May 13, 2016.

The Company may redeem each series of 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 3.300% Notes on or after January 15, 2021, the 4.400% Notes on or after November 15, 2025 or the 3.375% Notes on or after July 15, 2026, it will not be required to pay a make-whole premium. In addition, if the Company undergoes a change of control and corresponding ratings decline, each as defined in the applicable supplemental indenture, it may be required to repurchase all of the applicable notes at a purchase price equal to 101% of the principal amount of such notes, plus accrued and unpaid interest (including additional interest, if any), up to but not including the repurchase date. The notes rank equally with all of the Company’s other senior unsecured debt and are structurally subordinated to all existing and future indebtedness and other obligations of its subsidiaries.

The supplemental indentures contain 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 such liens does not exceed 3.5x Adjusted EBITDA, as defined in the applicable supplemental indenture.

Bank Facilities

2013 Credit Facility—During the six months ended June 30, 2016, the Company borrowed an aggregate of $1.2 billion and repaid an aggregate of $2.4 billion of revolving indebtedness under the 2013 Credit Facility. The Company primarily used the borrowings to fund the Viom Acquisition. On July 15, 2016, the Company borrowed $110.0 million under the 2013 Credit Facility.

2014 Credit Facility—During the six months ended June 30, 2016, the Company borrowed an aggregate of $80.0 million and repaid an aggregate of $220.0 million of revolving indebtedness under its senior unsecured revolving credit facility entered into in January 2012 and amended and restated in September 2014, as further amended (the “2014 Credit Facility”).

As of June 30, 2016, the key terms under the 2013 Credit Facility, the 2014 Credit Facility and the Company’s unsecured term loan entered into in October 2013, as amended (the “Term Loan”) were as follows:

	Outstanding Principal Balance (in millions)		Undrawn letters of credit (in millions)		Maturity Date	Current margin over LIBOR (1)		Current commitment fee (2)
2013 Credit Facility	$	72.2	$	3.2	June 28, 2019 (3)	1.250	%	0.150	%
2014 Credit Facility	$	1,840.0	$	7.4	January 29, 2021 (3)	1.250	%	0.150	%
Term Loan	$	2,000.0	N/A		January 29, 2021	1.250	%	N/A

_______________

(1)    LIBOR means the London Interbank Offered Rate.

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

(3)    Subject to two optional renewal periods.

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FAIR VALUE MEASUREMENTS

6 Months Ended

Jun. 30, 2016

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 value of the Company’s financial assets and liabilities that are required to be measured on a recurring basis at fair value was as follows (in thousands):

	June 30, 2016				December 31, 2015
	Fair Value Measurements Using				Fair Value Measurements Using
	Level 2		Level 3		Level 2		Level 3
Assets:
Interest rate swap agreements	$	751	—		$	692	—
Embedded derivative in lease agreement	—		$	13,735	—		$	14,176
Liabilities:
Acquisition-related contingent consideration	—		$	12,225	—		$	12,436

During the six months ended June 30, 2016, the Company has made no changes to the methods described in note 11 to the Company’s consolidated financial statements in the 2015 Form 10-K that it used to measure the fair value of its interest rate swap agreements, the embedded derivative in one of its lease agreements and acquisition-related contingent consideration. The changes in fair value during the six months ended June 30, 2016 and 2015 were not material to the consolidated financial statements.  As of June 30, 2016, the Company estimated the value of all potential acquisition-related contingent consideration required payments to be between zero and $26.3 million.

Redeemable Noncontrolling Interests

In connection with the Viom Acquisition, the Company entered into a shareholders’ agreement that provides for put options held by certain noncontrolling shareholders (see note 9). The fair value of the Company’s noncontrolling interests reflected on the consolidated balance sheet are determined using a discounted cash flow approach, which takes into consideration Level 3 unobservable inputs and applies a discount factor.

The fair value of the redeemable noncontrolling interests was $1.1 billion at the date of acquisition and was recorded in  

Redeemable noncontrolling interests in the consolidated balance sheet.

See notes 9 and 13 for more information.

Items Measured at Fair Value on a Nonrecurring Basis

Assets Held and Used—The Company’s long-lived assets are recorded at amortized cost and, if impaired, are adjusted to fair value using Level 3 inputs. During the three and six months ended June 30, 2016 and 2015, the Company did not record any material asset impairment charges.

There were no other items measured at fair value on a nonrecurring basis during the six months ended June 30, 2016.

Fair Value of Financial Instruments—The Company’s financial instruments for which the carrying value reasonably approximates fair value at June 30, 2016 and December 31, 2015 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 June 30, 2016 and December 31, 2015, the carrying value of long-term obligations, including the current portion, was $18.7 billion and $17.1 billion, respectively. As of June 30, 2016, the fair value of long-term obligations, including the current portion, was $19.5 billion, of which $11.3 billion was measured using Level 1 inputs and $8.2 billion was measured using Level 2 inputs. As of December 31, 2015, the fair value of long-term obligations, including the current portion, was $17.4 billion, of which $8.7 billion was measured using Level 1 inputs and $8.7 billion was measured using Level 2 inputs.

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INCOME TAXES

6 Months Ended

Jun. 30, 2016

Income Tax Expense (Benefit), Continuing Operations [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. As a REIT, the Company continues to be subject to income taxes on the income of its TRSs and income taxes in foreign jurisdictions where it conducts international operations. 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 REIT operations. In addition, the Company is able to offset certain income by utilizing its net operating losses, subject to specified limitations.

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 positive and negative evidence to estimate if sufficient future taxable income will be generated to use the existing deferred tax assets.

As described in note 1, effective January 1, 2016, the Company adopted new guidance on the accounting for share-based payment transactions. As part of this new guidance, excess windfall tax benefits and tax deficiencies related to the Company’s stock option exercises and restricted stock unit vestings are recognized as an income tax benefit or expense in the consolidated statements of operations in the period in which the deduction occurs. Excess windfall tax benefits and tax deficiencies are, therefore, not anticipated when determining the annual ETR and are instead recognized in the interim period in which those items occur.

As of June 30, 2016 and December 31, 2015, the total unrecognized tax benefits that would impact the ETR, if recognized, were approximately $68.6 million and $28.1 million, respectively. The amount of unrecognized tax benefits during the three and six months ended June 30, 2016 includes additions to the Company’s existing tax positions of $32.8 million and $39.3 million, respectively, both of which include $23.8 million of tax positions assumed through acquisition, and foreign currency fluctuations of $0.4 million and $1.2 million, respectively. The Company expects the unrecognized tax benefits to change over the next 12 months if certain tax matters ultimately settle with the applicable taxing jurisdiction during this time frame, as described in note 12 to the Company’s consolidated financial statements included in the 2015 Form 10-K. The impact of the amount of these changes to previously recorded uncertain tax positions could range from zero to $14.1 million.

The Company recorded penalties and income tax-related interest expense during the three and six months ended June 30, 2016 of $2.2 million and $5.2 million, respectively, and during the three and six months ended June 30, 2015 of $0.6 million and $1.5 million, respectively. As of June 30, 2016 and December 31, 2015, the total amount of accrued income tax related interest and penalties included in the consolidated balance sheets was $25.0 million and $20.2 million, respectively.

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STOCK-BASED COMPENSATION

6 Months Ended

Jun. 30, 2016

Share-based Compensation, Allocation and Classification in Financial Statements [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 2007 Equity Incentive Plan (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 in the case of non-qualified and incentive stock options are not less than the fair value of the underlying common stock on the date of grant. Equity awards typically vest ratably, generally over four years for time-based restricted stock units (“RSUs”) and stock options and three years for performance-based restricted stock units (“PSUs”). Stock options generally expire ten years from the date of grant. As of June 30, 2016, the Company had the ability to grant stock-based awards with respect to an aggregate of 9.4 million shares of common stock under the 2007 Plan. In addition, the Company maintains an employee stock purchase plan (“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 of 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.

The Company recognized stock-based compensation expense of $21.9 million and $50.0 million during the three and six months ended June 30, 2016, respectively, and recognized stock-based compensation expense of $24.0 million and $53.9 million during the three and six months ended June 30, 2015, respectively. The Company capitalized $0.1 million and $0.8 million of stock-based compensation expense as property and equipment during the three and six months ended June 30, 2016, respectively, and capitalized $0.6 million and $1.1 million of stock-based compensation expense as property and equipment during the three and six months ended June 30, 2015, respectively.

Stock Options—The fair value of each option granted during the six months ended June 30, 2016 was estimated on the date of grant using the Black-Scholes option pricing model based on the assumptions noted in the table below. The expected life of stock options (estimated period of time outstanding) was estimated using the vesting term and historical exercise behavior of the Company’s employees. The risk-free interest rate was based on the U.S. Treasury yield with a term that approximated the estimated life in effect at the accounting measurement date. The expected volatility of the underlying stock price was based on historical volatility for a period equal to the expected life of the stock options. The expected annual dividend yield was the Company’s best estimate of expected future dividend yield.

Key assumptions used to apply this pricing model during the six months ended June 30, 2016 were as follows:

Range of risk-free interest rate	1.45% - 1.73%
Weighted average risk-free interest rate	1.45%
Range of expected life of stock options	4.5 - 5.2 years
Range of expected volatility of the underlying stock price	20.64% - 21.45%
Weighted average expected volatility of underlying stock price	21.45%
Range of expected annual dividend yield	1.85% - 2.40%

The weighted average grant date fair value per share during the six months ended June 30, 2016 was $14.56. As of June 30, 2016, total unrecognized compensation expense related to unvested stock options was $34.8 million, which is expected to be recognized over a weighted average period of approximately two years.

The Company’s option activity for the six months ended June 30, 2016 was as follows:

	Number of Options
Outstanding as of January 1, 2016	7,680,819
Granted	1,132,596
Exercised	(907,829	)
Forfeited	(16,320	)
Expired	(500	)
Outstanding as of June 30, 2016	7,888,766

Restricted Stock Units—As of June 30, 2016, total unrecognized compensation expense related to unvested RSUs granted under the 2007 Plan was $115.6 million and is expected to be recognized over a weighted average period of approximately three years.

Performance-Based Restricted Stock Units—During the six months ended June 30, 2016, the Compensation Committee granted an aggregate of 169,340 PSUs to its executive officers (the “2016 PSUs”) and established the performance metrics for this award. During the six months ended June 30, 2015, the Compensation Committee granted an aggregate of 70,135 PSUs to its executive officers (the “2015 PSUs”) and established the performance metric for this award. Threshold, target and maximum parameters were established for the metrics for a three-year performance period with respect to the 2016 PSUs and for each year in the three-year performance period with respect to the 2015 PSUs and will be used to calculate the number of shares that will be issuable when the award vests, which may range from zero to 200% of the target amount. At the end of the 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 the performance period, subject generally to the executive’s continued employment. PSUs will accrue dividend equivalents prior to vesting, which will be paid out only in respect of shares actually vested.

The performance metric related to the 2015 PSUs is tied to year-over-year growth, and actual results for the metric cannot be determined until the end of each respective fiscal year. As a result, as of June 30, 2016, the Company was unable to determine the annual target for the third year of the performance period for this award. Accordingly, an aggregate of 23,377 PSUs was not included in the table below.

Restricted Stock Units and Performance-Based Restricted Stock Units—The Company’s RSU and PSU activity for the six months ended June 30, 2016 was as follows:

	RSUs		PSUs
Outstanding as of January 1, 2016 (1)	1,656,993		33,377
Granted (2)	767,421		192,719
Vested	(635,126	)	—
Forfeited	(54,053	)	—
Outstanding as of June 30, 2016	1,735,235		226,096

_______________

(1) PSUs represent the shares issuable for the 2015 PSUs at the end of the three-year performance cycle based on exceeding the performance metric for the first year’s performance period.

(2) PSUs represent the target number of shares issuable at the end of the three-year performance cycle attributable to the second year’s performance period for the 2015 PSUs and the target number of shares issuable at the end of the three-year performance cycle for the 2016 PSUs.

During the three and six months ended June 30, 2016, the Company recorded $2.4 million and $3.2 million, respectively, in stock-based compensation expense for equity awards in which the performance goals had been established and were probable of being achieved. The remaining unrecognized compensation expense related to these awards at June 30, 2016 was $16.6 million based on the Company’s current assessment of the probability of achieving the performance goals. The weighted-average period over which the cost will be recognized is approximately two years.

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REDEEMABLE NONCONTROLLING INTERESTS

6 Months Ended

Jun. 30, 2016

Noncontrolling Interest [Abstract]

REDEEMABLE NONCONTROLLING INTERESTS

REDEEMABLE NONCONTROLLING INTERESTS

Redeemable Noncontrolling Interests—In connection with the Viom Acquisition, the Company, through one of its subsidiaries, entered into a shareholders agreement (the “Shareholders Agreement”) with Viom and the following remaining Viom shareholders: Tata Sons Limited, Tata Teleservices Limited, IDFC Private Equity Fund III, Macquarie SBI Investments Pte Limited and SBI Macquarie Infrastructure Trust (collectively, the “Remaining Shareholders”). The Shareholders Agreement provides for, among other things, put options held by certain of the Remaining Shareholders, which allow the Remaining Shareholders to sell outstanding shares of ATC TIPL, and call options held by the Company, which allow the Company to buy the nonontrolling shares of ATC TIPL. The put options, which are not under the Company’s control, cannot be separated from the noncontrolling interests. As a result, the combination of the noncontrolling interests and the redemption feature require classification as redeemable noncontrolling interests in the consolidated balance sheet, separate from equity.

Given the provisions governing the put rights, the redeemable noncontrolling interests are recorded outside of permanent equity at their redemption value. The noncontrolling interests become redeemable after the passage of time, and therefore the Company records the carrying amount of the noncontrolling interests at the greater of (i) the initial carrying amount, increased or decreased for the noncontrolling interests’ share of net income or loss, and (ii) the redemption value. If required, the Company will adjust the redeemable noncontrolling interests to redemption value on each balance sheet date with changes in redemption value recognized as an adjustment to Distributions in excess of earnings.

The put options may be exercised, requiring the Company to purchase the Remaining Shareholders’ equity interests, on specified dates beginning April 1, 2018 through March 31, 2021. The price of the put options will be based on the fair market value of the exercising Remaining Shareholder’s interest in the Company’s India operations at the time the option is exercised. Put options held by certain of the Remaining Shareholders are subject to a floor price of 216 INR per share.

The following is a reconciliation of the changes in the Redeemable noncontrolling interests (in thousands):

Balance as of January 1, 2016	$	—
Fair value at acquisition	1,097,841
Net income attributable to noncontrolling interests	4,323
Foreign currency translation adjustment attributable to noncontrolling interests	(17,007		)
Balance as of June 30, 2016	$	1,085,157

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EQUITY

6 Months Ended

Jun. 30, 2016

Stockholders' Equity Attributable to Parent [Abstract]

EQUITY

EQUITY

Series A Preferred Stock—The Company has 6,000,000 shares of its 5.25% Mandatory Convertible Preferred Stock, Series A, par value $0.01 per share (the “Series A Preferred Stock”) outstanding, which were issued in May 2014. 

Unless converted or redeemed earlier, each share of the Series A Preferred Stock will automatically convert on May 15, 2017, into between 0.9272 and 1.1591 shares of the Company’s common stock, depending on the applicable market value of the Company’s common stock and subject to anti-dilution adjustments. Subject to certain restrictions, at any time prior to May 15, 2017, holders of the Series A Preferred Stock may elect to convert all or a portion of their shares into common stock at the minimum conversion rate then in effect.

Dividends on shares of the Series A Preferred Stock are payable on a cumulative basis when, as and if declared by the Company’s Board of Directors at an annual rate of 5.25% on the liquidation preference of $100.00 per share, on February 15, May 15, August 15 and November 15 of each year, commencing on August 15, 2014 to, and including, May 15, 2017.

Series B Preferred Stock—The Company has 13,750,000 depositary shares, each representing a 1/10th interest in a share of its 5.50% Mandatory Convertible Preferred Stock, Series B, par value $0.01 per share (the “Series B Preferred Stock” and, together with the Series A Preferred Stock, the “Mandatory Convertible Preferred Stock”) outstanding, which were issued in March 2015.

Unless converted or redeemed earlier, each share of the Series B Preferred Stock will automatically convert on February 15, 2018, into between 8.5911 and 10.3093 shares of the Company’s common stock, depending on the applicable market value of the Company’s common stock and subject to anti-dilution adjustments. Subject to certain restrictions, at any time prior to February 15, 2018, holders of the Series B Preferred Stock may elect to convert all or a portion of their shares into common stock at the minimum conversion rate then in effect.

Dividends on shares of the Series B Preferred Stock are payable on a cumulative basis when, as and if declared by the Company’s Board of Directors at an annual rate of 5.50% on the liquidation preference of $1,000.00 per share (and, correspondingly, $100.00 per share with respect to the depositary shares) on February 15, May 15, August 15 and November 15 of each year, commencing on May 15, 2015 to, and including, February 15, 2018.

The Company may pay dividends in cash or, subject to certain limitations, in shares of common stock or any combination of cash and shares of common stock. The terms of the Mandatory Convertible Preferred Stock provide that, unless full cumulative dividends have been paid or set aside for payment on all outstanding Mandatory Convertible Preferred Stock for all prior dividend periods, no dividends may be declared or paid on common stock.

Sales of Equity Securities—The Company receives proceeds from the sale of its equity securities pursuant its ESPP and upon exercise of stock options granted under its equity incentive plan. During the six months ended June 30, 2016, the Company received an aggregate of $60.4 million in proceeds upon exercises of stock options and ESPP.

Distributions—During the six months ended June 30, 2016, the Company declared or paid the following cash distributions:

Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (in millions)
Common Stock
December 3, 2015	January 13, 2016	December 16, 2015	$	0.49	$	207.7
March 9, 2016	April 28, 2016	April 12, 2016	$	0.51	$	216.5
June 2, 2016	July 15, 2016	June 17, 2016	$	0.53	$	225.4
Series A Preferred Stock
January 14, 2016	February 16, 2016	February 1, 2016	$	1.3125	$	7.9
April 16, 2016	May 16, 2016	May 1, 2016	$	1.3125	$	7.9
Series B Preferred Stock
January 14, 2016	February 16, 2016	February 1, 2016	$	13.75	$	18.9
April 16, 2016	May 16, 2016	May 1, 2016	$	13.75	$	18.9

The Company accrues distributions on unvested restricted stock units, which are payable upon vesting. As of June 30, 2016, the amount accrued for distributions payable related to unvested restricted stock units was $4.8 million. During the six months ended June 30, 2016, the Company paid $2.4 million of distributions upon the vesting of restricted stock units. To maintain its qualification for taxation as a REIT, the Company expects to continue paying distributions, the amount, timing and frequency of which will be determined, and subject to adjustment, by the Company’s Board of Directors.

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EARNINGS PER COMMON SHARE

6 Months Ended

Jun. 30, 2016

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 (in thousands, except per share data):

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Net income attributable to American Tower Corporation stockholders	$	187,550		$	156,056		$	462,709		$	349,373
Dividends on preferred stock	(26,782		)	(26,782		)	(53,563		)	(36,601		)
Net income attributable to American Tower Corporation common stockholders	160,768			129,274			409,146			312,772
Basic weighted average common shares outstanding	424,909			423,154			424,484			414,182
Dilutive securities	4,095			3,779			4,045			4,121
Diluted weighted average common shares outstanding	429,004			426,933			428,529			418,303
Basic net income attributable to American Tower Corporation common stockholders per common share	$	0.38		$	0.31		$	0.96		$	0.76
Diluted net income attributable to American Tower Corporation common stockholders per common share	$	0.37		$	0.30		$	0.95		$	0.75

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 June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
Restricted stock awards	—	—	1	—
Stock options	1,120	1,734	1,974	1,229
Preferred stock	17,444	17,349	17,444	13,364

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COMMITMENTS AND CONTINGENCIES

6 Months Ended

Jun. 30, 2016

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 provides for the lease, sublease or management of 11,286 wireless communications sites commencing March 27, 2015. The average term of the lease or sublease for all sites at the inception of the agreement was approximately 28 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the leased sites in tranches, subject to the applicable lease, sublease or management rights upon its scheduled expiration. Each tower is assigned to an annual tranche, ranging from 2034 to 2047, which represents the outside expiration date for the sublease rights to the towers in that tranche. The purchase price for each tranche is a fixed amount stated in the lease for such tranche plus the fair market value of certain alterations made to the related towers. The aggregate purchase option price for the towers leased and subleased is approximately $5.0 billion. Verizon will occupy the sites as a tenant for an initial term of ten years with eight optional successive five-year terms; each such term shall be governed by standard master lease agreement terms established as a part of the transaction.

AT&T Transaction—The Company has an agreement with SBC Communications Inc., a predecessor entity to AT&T Inc. (“AT&T”), that currently provides for the lease or sublease of approximately 2,370 towers commencing between December 2000 and August 2004. Substantially all of the towers are part of the Company’s 2013 securitization transaction. The average term of the lease or sublease for all sites at the inception of the agreement was approximately 27 years, assuming renewals or extensions of the underlying ground leases for the sites. The Company has the option to purchase the sites subject to the applicable lease or sublease upon its expiration. Each tower is assigned to an annual tranche, ranging from 2013 to 2032, which represents the outside expiration date for the sublease rights to that tower. The purchase price for each site is a fixed amount stated in the lease for that site plus the fair market value of certain alterations made to the related tower by AT&T. As of June 30, 2016, the Company has purchased an aggregate of 60 of the subleased towers upon expiration of the applicable agreement. The aggregate purchase option price for the remaining towers leased and subleased is $730.5 million and will accrete at a rate of 10% per annum through the applicable expiration of the lease or sublease of a site. For all such sites purchased by the Company prior to June 30, 2020, AT&T will continue to lease the reserved space at the then-current monthly fee, which shall escalate in accordance with the standard master lease agreement for the remainder of AT&T’s tenancy. Thereafter, AT&T shall have the right to renew such lease for up to four successive five-year terms. For all such sites purchased by the Company subsequent to June 30, 2020, AT&T has the right to continue to lease the reserved space for successive one-year terms at a rent equal to the lesser of the agreed upon market rate and the then-current monthly fee, which is subject to an annual increase based on changes in the U.S. Consumer Price Index.

ALLTEL Transaction—In December 2000, the Company entered into an agreement with ALLTEL, a predecessor entity to Verizon Wireless, to acquire towers through a 15-year sublease agreement. Pursuant to the agreement, as amended, with Verizon Wireless, the Company acquired rights to approximately 1,800 towers in tranches between April 2001 and March 2002. The Company has the option to purchase each tower at the expiration of the applicable sublease. The Company exercised the purchase options for approximately 1,525 towers in a single closing to occur on or before November 30, 2016. The Company has provided notice to the tower owner of its intent to exercise the purchase options related to the remaining towers. As of June 30, 2016, the purchase price per tower was $42,844 payable in cash or, at Verizon Wireless’s or its assignee’s option, as applicable, with 769 shares of the Company’s common stock per tower. The aggregate cash purchase option price for the subleased towers was $75.7 million as of June 30, 2016.

Other Contingencies—The Company is subject to income tax and other taxes in the geographic areas where it operates, and periodically receives notifications of audits, assessments or other actions by taxing authorities. The Company evaluates the circumstances of each notification based on the information available and records a liability for any potential outcome that is probable or more likely than not unfavorable if the liability is also reasonably estimable.

Tenant Leases—The Company’s lease agreements with its tenants vary depending upon the region and the industry of the tenant, and typically have initial terms of ten years with multiple renewal terms at the option of the tenant.

Future minimum rental receipts expected from tenants under non-cancellable operating lease agreements in effect at June 30, 2016 were as follows (in millions):

Remainder of 2016	$	2,424
2017	4,594
2018	4,413
2019	4,149
2020	3,794
Thereafter	12,485
Total	$	31,859

Lease Obligations—The Company leases certain land, office and tower space under operating leases that expire over various terms. Many of the leases contain renewal options with specified increases in lease payments upon exercise of the renewal option. Escalation clauses present in operating leases, excluding those tied to a consumer price index or other inflation-based indices, are recognized on a straight-line basis over the non-cancellable term of the leases.

Future minimum rental payments under non-cancellable operating leases include payments for certain renewal periods at the Company’s option because failure to renew could result in a loss of the applicable communications sites and related revenues from tenant leases, thereby making it reasonably assured that the Company will renew the leases. Such payments at June 30, 2016 are as follows (in millions):

Remainder of 2016	$	461
2017	889
2018	863
2019	829
2020	790
Thereafter	7,329
Total	$	11,161

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ACQUISITIONS

6 Months Ended

Jun. 30, 2016

Business Combinations [Abstract]

ACQUISITIONS

ACQUISITIONS

Impact of current year acquisitions—The Company typically acquires communications sites from wireless carriers or other tower operators and subsequently integrates those sites into its existing portfolio of communications sites. The financial results of the Company’s acquisitions have been included in the Company’s consolidated statements of operations for the three and six months ended June 30, 2016 from the date of the respective acquisition. The date of acquisition, and by extension the point at which the Company begins to recognize the results of an acquisition, may depend on, among other things, the receipt of contractual consents, the commencement and extent of leasing arrangements and the timing of the transfer of title or rights to the assets, which may be accomplished in phases. Sites acquired from communications service providers may never have been operated as a business and may instead have been utilized solely by the seller as a component of its network infrastructure. An acquisition may or may not involve the transfer of business operations or employees.

The estimated aggregate impact of the 2016 acquisitions on the Company’s revenues and gross margin for both the three and six months ended June 30, 2016 was approximately $158.0 million and $65.2 million, respectively. The revenues and gross margin amounts also reflect incremental revenues from the addition of new tenants to such sites subsequent to the transaction date.

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. Acquisition and merger related expenses may include finder’s fees, advisory, legal, accounting, valuation and other professional or consulting fees, fair value adjustments to contingent consideration and general administrative costs directly related to the transaction. Integration costs include incremental and non-recurring costs necessary to convert data, retain employees and otherwise enable the Company to operate new businesses efficiently. The Company records acquisition and merger related expenses, as well as integration costs, in Other operating expenses in the consolidated statements of operations.

During the three and six months ended June 30, 2016 and 2015, the Company recorded acquisition and merger related expenses and integration costs as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Acquisition and merger related expenses	$	5,735	$	5,021	$	6,720	$	7,987
Integration costs	$	3,234	$	4,525	$	6,505	$	6,280

The acquisitions described below are accounted for as business combinations and are consistent with the Company’s strategy to expand in selected geographic areas.

2016 Acquisitions

Viom Acquisition—On April 21, 2016, the Company, through its wholly owned subsidiary, ATC Asia Pacific Pte. Ltd. (“ATC Asia”), acquired a 51% controlling ownership interest in Viom, a telecommunications infrastructure company that owns and operates over 42,000 wireless communications towers and 200 indoor DAS networks in India, from certain Viom shareholders, including the managing shareholder, SREI Infrastructure Finance Limited, several other minority shareholders and Tata Teleservices Limited (collectively, the “Selling Shareholders”), pursuant to its previously announced share purchase agreement. Consideration for the acquisition included 76.4 billion INR in cash ($1.1 billion at the date of acquisition), as well as the assumption of approximately 52.3 billion INR ($0.8 billion at the date of acquisition) of existing debt, which included 1.7 billion INR ($25.1 million at the date of acquisition) of mandatorily redeemable preference shares issued by Viom.

On April 21, 2016, the closing date of the Viom Acquisition, ATC Asia’s Shareholders Agreement with the Remaining Shareholders became effective. The Shareholders Agreement provides that, among other things, the Remaining Shareholders will have certain governance, anti-dilution and contractual rights. The Remaining Shareholders will have put options, and ATC Asia will have a call option, subject to the time periods and conditions outlined in the Shareholders Agreement.

Other Acquisitions—During the six months ended June 30, 2016, the Company acquired a total of 433 communications sites in the United States, Brazil, Germany and Nigeria for an aggregate purchase price of $79.8 million. The purchase prices are subject to post-closing adjustments.

The following table summarizes the preliminary allocation of the purchase price for the fiscal year 2016 acquisitions based upon their estimated fair value at the date of acquisition (in thousands). Balances are reflected in the accompanying consolidated balance sheet as of June 30, 2016.

	Asia			Other
	Viom
Current assets	$	283,854		$	6,050
Non-current assets	45,962			—
Property and equipment	765,127			24,251
Intangible assets (1):
Customer-related intangible assets	1,364,466			36,314
Network location intangible assets	639,438			8,928
Current liabilities	(180,734		)	(55		)
Deferred tax liability	(635,529		)	—
Other non-current liabilities	(105,458		)	(3,833		)
Net assets acquired	2,177,126			71,655
Goodwill (2)	856,110			8,104
Fair value of net assets acquired	3,033,236			79,759
Debt assumed	(786,889		)	—
Redeemable noncontrolling interests	(1,097,841		)	—
Purchase Price (3)	$	1,148,506		$	79,759

_______________

(1) Customer-related intangible assets and network location intangible assets are amortized on a straight-line basis over periods of up to 20 years.

(2) Primarily results from purchase accounting adjustments which are not deductible for tax purposes.

(3) Other includes contingent consideration of $0.1 million.

2015 Acquisitions

The estimates of the fair value of the assets or rights acquired and liabilities assumed at the date of the applicable acquisition are subject to adjustment during the measurement period (up to one year from the applicable acquisition date). During the six months ended June 30, 2016, the Company adopted new guidance on the accounting for measurement-period adjustments related to business combinations. This guidance requires that an acquirer make adjustments to the provisional amounts recognized at acquisition date with a corresponding adjustment to goodwill in the current period. Additionally, the effects on earnings of all measurement-period adjustments are included in current period earnings.

During the six months ended June 30, 2016, post-closing adjustments impacted the following 2015 acquisitions:

TIM Acquisition—On April 29, 2015, the Company acquired 4,176 communications sites from TIM Celular S.A. (“TIM”) for an initial aggregate purchase price of $644.3 million, which was subsequently reduced by $0.8 million during the six months ended June 30, 2016. On September 30, 2015, the Company acquired an additional 1,125 communications sites from TIM for an initial aggregate purchase price of $130.9 million. On December 16, 2015, the Company acquired an additional 182 communications sites from TIM for an initial aggregate purchase price of $21.7 million. The purchase price for the September and December 2015 TIM acquisitions remain subject to post-closing adjustments. Pursuant to the terms of the agreement, the Company has the ability to purchase the remaining communications sites as they become available through October 2016, a portion of which was acquired during the three months ended June 30, 2016.

The following table summarizes the preliminary and updated allocations of the purchase prices paid and the amounts of assets acquired and liabilities assumed for the fiscal year 2015 acquisitions based upon their estimated fair value at the date of acquisition (in thousands).

	Preliminary Allocation			Updated Allocation (1)
	Latin America			Latin America
	TIM			TIM
Current assets	$	—		$	—
Non-current assets	—			—
Property and equipment	275,630			275,570
Intangible assets (2):
Customer-related intangible assets	361,822			361,048
Network location intangible assets	115,562			115,577
Current liabilities	(3,192		)	(3,192		)
Deferred tax liability	—			—
Other non-current liabilities	(74,966		)	(74,966		)
Net assets acquired	674,856			674,037
Goodwill	122,011			122,011
Fair value of net assets acquired	796,867			796,048
Debt assumed	—			—
Purchase Price	$	796,867		$	796,048

_______________

(1) The allocation of the purchase price related to the initial 4,176 communications sites acquired from TIM on April 29, 2015 was finalized during the six months ended June 30, 2016.

(2) Customer-related intangible assets and network location intangible assets are amortized on a straight-line basis over periods of up to 20 years.

Pro Forma Consolidated Results

The following table presents the unaudited pro forma financial results as if the 2016 acquisitions had occurred on January 1, 2015 and acquisitions completed in 2015 had occurred on January 1, 2014. The pro forma results do not include any anticipated cost synergies, costs or other integration impacts. Accordingly, such pro forma amounts are not necessarily indicative of the results that actually would have occurred had the transactions been completed on the date indicated, nor are they indicative of the future operating results of the Company.

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Pro forma revenues	$	1,489,485	$	1,447,850	$	2,976,772	$	2,918,700
Pro forma net income attributable to American Tower Corporation common stockholders	$	164,191	$	129,154	$	408,945	$	280,165
Pro forma net income per common share amounts:
Basic net income attributable to American Tower Corporation common stockholders	$	0.39	$	0.31	$	0.96	$	0.66
Diluted net income attributable to American Tower Corporation common stockholders	$	0.38	$	0.30	$	0.95	$	0.66

Other Signed Acquisitions

Airtel Tanzania—On March 17, 2016, the Company entered into a definitive agreement with Airtel, through its subsidiary company Airtel Tanzania Limited (“Airtel Tanzania”), pursuant to which the Company may acquire approximately 1,350 of Airtel Tanzania’s communications sites in Tanzania, for total consideration of approximately $179.0 million, subject to customary adjustments. Under the agreement, the Company may pay additional consideration to acquire up to approximately 100 additional communications sites currently in development. The closing of this transaction is subject to customary closing conditions and regulatory approval.

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BUSINESS SEGMENTS

6 Months Ended

Jun. 30, 2016

Segment Reporting, Measurement Disclosures [Abstract]

BUSINESS SEGMENTS

BUSINESS SEGMENTS

In 2015, as a result of recent investment activity, including signed acquisitions, the Company reviewed and changed its reportable segments to divide its international segment into three regional segments: (i) Asia property, (ii) Europe, Middle East and Africa (“EMEA”) property and (iii) Latin America property, resulting in five total segments. The change in reportable segments had no impact on the Company’s consolidated and condensed consolidated financial statements for any periods. However, certain expenses previously reflected in segment selling, general, administrative and development expense have been reclassified and are now reflected as Other selling, general, administrative and development expense. Historical financial information included in this Quarterly Report on Form 10-Q has been adjusted to reflect the change in reportable segments.

The Company’s primary business is leasing space on multitenant communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. This business is referred to as the Company’s property operations, which as of June 30, 2016, consisted of the following:

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

• Asia: property operations in India;

• EMEA: property operations in Germany, Ghana, Nigeria, South Africa and Uganda; and

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

The Company has applied the aggregation criteria to operations within the EMEA and Latin America property operating segments on a basis that is consistent with management’s review of information and performance evaluations of these regions.

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

The accounting policies applied in compiling segment information below are similar to those described in note 1 to the Company’s consolidated financial statements included in the 2015 Form 10-K. Among other factors, in evaluating financial performance in each business segment, management uses segment gross margin and segment operating profit. The Company defines segment gross margin as segment revenue less segment operating expenses excluding stock-based compensation expense recorded in costs of operations; Depreciation, amortization and accretion; Selling, general, administrative and development expense; and Other operating expenses. The Company defines segment operating profit as segment gross margin less Selling, general, administrative and development expense attributable to the segment, excluding stock-based compensation expense and corporate expenses. For reporting purposes, the Latin America property segment gross margin and segment operating profit also include Interest income, TV Azteca, net. These measures of segment gross margin and segment operating profit are also before Interest income, Interest expense, Gain (loss) on retirement of long-term obligations, Other income (expense), Net income (loss) attributable to noncontrolling interests and Income tax benefit (provision). The categories of expenses indicated above, such as depreciation, have been excluded from segment operating performance as they are not considered in the review of information or the evaluation of results by management. There are no significant revenues resulting from transactions between the Company’s operating segments. All intercompany transactions are eliminated to reconcile segment results and assets to the consolidated statements of operations and consolidated balance sheets.

Summarized financial information concerning the Company’s reportable segments for the three and six months ended June 30, 2016 and 2015 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, as the amounts are not utilized in assessing each segment’s performance.

	Property								Total  Property		Services		Other		Total
Three Months Ended June 30, 2016	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	829,680	$	224,611	$	134,762	$	237,139	$	1,426,192	$	16,035			$	1,442,227
Segment operating expenses (1)	182,376		127,855		58,462		83,486		452,179		6,885				459,064
Interest income, TV Azteca, net	—		—		—		2,748		2,748		—				2,748
Segment gross margin	647,304		96,756		76,300		156,401		976,761		9,150				985,911
Segment selling, general, administrative and development expense (1)	34,721		14,770		16,685		15,031		81,207		3,346				84,553
Segment operating profit	$	612,583	$	81,986	$	59,615	$	141,370	$	895,554	$	5,804			$	901,358
Stock-based compensation expense													$	21,907	21,907
Other selling, general, administrative and development expense													32,421		32,421
Depreciation, amortization and accretion													397,765		397,765
Other expense (2)													213,291		213,291
Income from continuing operations before income taxes															$	235,974
Total assets	$	18,949,936	$	4,557,692	$	2,025,767	$	4,929,052	$	30,462,447	$	62,766	$	214,985	$	30,740,198

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $0.6 million and $21.3 million, respectively.

(2)    Primarily includes interest expense.

	Property								Total  Property		Services		Other		Total
Three Months Ended June 30, 2015	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	802,841	$	60,009	$	70,408	$	220,977	$	1,154,235	$	20,140			$	1,174,375
Segment operating expenses (1)	182,172		31,628		24,198		75,897		313,895		8,075				321,970
Interest income, TV Azteca, net	—		—		—		2,662		2,662		—				2,662
Segment gross margin	620,669		28,381		46,210		147,742		843,002		12,065				855,067
Segment selling, general, administrative and development expense (1)	31,243		4,480		11,952		12,990		60,665		3,439				64,104
Segment operating profit	$	589,426	$	23,901	$	34,258	$	134,752	$	782,337	$	8,626			$	790,963
Stock-based compensation expense													$	24,045	24,045
Other selling, general, administrative and development expense (2)													28,677		28,677
Depreciation, amortization and accretion													328,356		328,356
Other expense (3)													238,749		238,749
Income from continuing operations before income taxes															$	171,136
Total assets (4)	$	19,383,596	$	748,268	$	1,159,978	$	4,930,775	$	26,222,617	$	71,268	$	175,840	$	26,469,725

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $0.5 million and $23.6 million, respectively.

(2) Includes $0.6 million of expense previously recorded as segment selling, general, administrative and development expense.

(3) Primarily includes interest expense and loss on retirement of long-term obligations.

(4) $21.2 million of assets previously recorded within the Asia, EMEA, and Latin America Property segments have been reclassified to the Other segment.

	Property								Total  Property		Services		Other		Total
Six Months Ended June 30, 2016	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	1,681,424	$	287,827	$	264,402	$	460,190	$	2,693,843	$	37,431			$	2,731,274
Segment operating expenses (1)	360,098		160,935		114,121		158,808		793,962		15,889				809,851
Interest income, TV Azteca, net	—		—		—		5,464		5,464		—				5,464
Segment gross margin	1,321,326		126,892		150,281		306,846		1,905,345		21,542				1,926,887
Segment selling, general, administrative and development expense (1)	72,007		21,346		32,837		29,615		155,805		6,262				162,067
Segment operating profit	$	1,249,319	$	105,546	$	117,444	$	277,231	$	1,749,540	$	15,280			$	1,764,820
Stock-based compensation expense													$	49,986	49,986
Other selling, general, administrative and development expense													62,801		62,801
Depreciation, amortization and accretion													739,399		739,399
Other expense (2)													366,229		366,229
Income from continuing operations before income taxes															$	546,405

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $1.3 million and $48.7 million, respectively.

(2) Primarily includes interest expense.

	Property								Total  Property		Services		Other		Total
Six Months Ended June 30, 2015	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	1,520,721	$	117,136	$	146,209	$	432,349	$	2,216,415	$	37,150			$	2,253,565
Segment operating expenses (1)	315,204		61,288		52,713		143,515		572,720		13,319				586,039
Interest income, TV Azteca, net	—		—		—		5,258		5,258		—				5,258
Segment gross margin	1,205,517		55,848		93,496		294,092		1,648,953		23,831				1,672,784
Segment selling, general, administrative and development expense (1)	58,065		11,309		20,811		30,252		120,437		6,875				127,312
Segment operating profit	$	1,147,452	$	44,539	$	72,685	$	263,840	$	1,528,516	$	16,956			$	1,545,472
Stock-based compensation expense													$	53,906	53,906
Other selling, general, administrative and development expense (2)													59,469		59,469
Depreciation, amortization and accretion													591,876		591,876
Other expense (3)													449,721		449,721
Income from continuing operations before income taxes															$	390,500

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $1.1 million and $52.8 million, respectively.

(2)    Includes $2.2 million of expense previously recorded as segment selling, general, administrative and development expense.

(3)    Primarily includes interest expense and loss on retirement of long-term obligations.

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DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)

6 Months Ended

Jun. 30, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Nature of Operations

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

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

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

On April 21, 2016, the Company significantly expanded its Asia segment portfolio by acquiring a 51% controlling ownership interest in Viom Networks Limited (“Viom”), a telecommunications infrastructure company that owns and operates over 42,000 wireless communications towers and 200 indoor DAS networks in India (the “Viom Acquisition”). Subsequent to the closing, Viom was renamed ATC Telecom Infrastructure Private Limited (“ATC TIPL”).

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

The use of TRSs enables the Company to continue to engage in certain businesses while complying with REIT qualification requirements. The Company may, from time to time, change the election of previously designated TRSs to be included as part of the REIT. As of June 30, 2016, the Company’s REIT-qualified businesses included its U.S. tower leasing business, most of its operations in Costa Rica, Germany and Mexico and a majority of its services segment and indoor DAS networks business.

The accompanying consolidated and condensed consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission. The financial information included herein is unaudited. However, the Company believes that all adjustments 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, 2015 (the “2015 Form 10-K”). The results of operations for the three and six months ended June 30, 2016 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 or cost method, depending upon the Company’s ability to exercise significant influence over operating and financial policies. All intercompany accounts and transactions have been eliminated.

Accounting Standards Updates

In May 2014, the Financial Accounting Standards Board (the “FASB”) issued new revenue recognition guidance, which requires an entity to recognize revenue in an amount that reflects the consideration to which the entity expects to be entitled in exchange for the transfer of promised goods or services to customers. The standard will replace most existing revenue recognition guidance and will become effective for the Company on January 1, 2018. Early adoption is permitted for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2016. The standard permits the use of either the retrospective or cumulative effect transition method. Leases are not included in the scope of this standard. The Company is evaluating the impact this standard will have on its financial statements.

In January 2016, the FASB issued new guidance on the recognition and measurement of financial assets and financial liabilities. The guidance amends certain aspects of recognition, measurement, presentation and disclosure of financial instruments. This standard is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2017. The Company does not expect the adoption of this guidance to have a material effect on its financial statements.

In February 2016, the FASB issued new guidance on the accounting for leases. The guidance amends the existing accounting standards for lease accounting, including the requirement that lessees recognize assets and liabilities for leases with terms greater than twelve months in the statement of financial position. Under the new guidance, lessor accounting is largely unchanged. This guidance is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2018. The standard is required to be applied using a modified retrospective approach for all leases existing at, or entered into after, the beginning of the earliest comparative period presented. The Company is evaluating the impact this standard will have on its financial statements.

In March 2016, the FASB issued new guidance on the accounting for share-based payment transactions. The guidance amends the accounting for taxes related to stock-based compensation, including how excess tax benefits and a company’s payments for tax withholdings should be classified. This guidance is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2016. The Company early adopted this standard in the second quarter of 2016 and elected to account for forfeitures as they occur, effective January 1, 2016. The adoption of this guidance was not material to the Company’s consolidated financial statements. Additionally, the Company elected to apply the prospective transition method to the amendments related to the presentation of excess tax benefits in the statements of cash flows.

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PREPAID AND OTHER CURRENT ASSETS (Tables)

6 Months Ended

Jun. 30, 2016

Prepaid Expense and Other Assets, Current [Abstract]

Prepaid and other current assets

Prepaid and other current assets consisted of the following (in thousands):

	As of
	June 30, 2016		December 31, 2015
Prepaid income tax	$	151,828	$	45,056
Prepaid operating ground leases	132,629		128,542
Unbilled receivables	59,124		34,173
Prepaid assets	59,063		32,892
Value added tax and other consumption tax receivables	32,258		30,239
Other miscellaneous current assets	46,977		35,333
Total	$	481,879	$	306,235

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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying value of goodwill

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

	Property										Services		Total
	U.S.		Asia (1)			EMEA			Latin America
Balance as of January 1, 2016	$	3,379,163	$	170,719		$	132,570		$	407,365	$	1,988	$	4,091,805
Additions	289		856,110			3,200			4,615		—		864,214
Effect of foreign currency translation	—		(16,714		)	(18,417		)	61,031		—		25,900
Balance as of June 30, 2016	$	3,379,452	$	1,010,115		$	117,353		$	473,011	$	1,988	$	4,981,919

_______________

(1) Includes approximately $856.1 million of goodwill assumed in the Viom Acquisition (see note 13).

Finite intangible assets

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

		As of June 30, 2016							As of December 31, 2015
	Estimated Useful Lives	Gross Carrying Value		Accumulated Amortization			Net Book Value		Gross Carrying Value		Accumulated Amortization			Net Book Value
	(years)	(in thousands)
Acquired network location intangibles (1)	Up to 20	$	4,589,425	$	(1,175,676	)	$	3,413,749	$	3,980,281	$	(1,052,393	)	$	2,927,888
Acquired customer-related intangibles	15-20	10,139,104		(1,996,896		)	8,142,208		8,640,554		(1,763,853		)	6,876,701
Acquired licenses and other intangibles	3-20	28,756		(3,725		)	25,031		28,293		(5,486		)	22,807
Economic Rights, TV Azteca	70	20,267		(10,563		)	9,704		21,688		(11,208		)	10,480
Total other intangible assets		$	14,777,552	$	(3,186,860	)	$	11,590,692	$	12,670,816	$	(2,832,940	)	$	9,837,876

_______________

(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 or up to 20 years, as the Company considers these intangibles to be directly related to the tower assets.

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 (in millions):

Fiscal Year
Remainder of 2016	$	356.6
2017	710.8
2018	708.6
2019	705.6
2020	686.8
2021	677.5

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ACCRUED EXPENSES (Tables)

6 Months Ended

Jun. 30, 2016

Accrued Liabilities, Current [Abstract]

Schedule of accrued expenses

Accrued expenses consisted of the following (in thousands):

	As of
	June 30, 2016		December 31, 2015
Accrued property and real estate taxes	$	108,636	$	75,827
Accrued income tax payable	70,490		11,704
Payroll and related withholdings	52,844		62,334
Accrued rent	50,449		54,732
Accrued construction costs	16,550		19,857
Other accrued expenses	318,742		291,959
Total	$	617,711	$	516,413

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LONG-TERM OBLIGATIONS (Tables)

6 Months Ended

Jun. 30, 2016

Long-term Debt, Excluding Current Maturities [Abstract]

Long-term financing arrangements

Viom indebtedness—Amounts outstanding and key terms of the Viom indebtedness consisted of the following as of June 30, 2016 (in millions):

	Amount Outstanding (INR)	Amount Outstanding (USD)		Interest Rate (Range)		Maturity Date (Range)
Term loans	39,745	$	588.6	8.75% - 11.20%		March 31, 2017 - November 30, 2024
Debenture	6,000	$	88.9	9.90	%	April 28, 2020
Working capital facilities	1,406	$	20.8	11.05% - 11.60%		October 23, 2016 - March 18, 2017

Outstanding amounts under the Company’s long-term obligations, reflecting discounts, premiums and debt issuance costs, consisted of the following (in thousands):

	As of
	June 30, 2016			December 31, 2015			Maturity Date
Series 2013-1A securities (1)	$	498,060		$	497,478		March 15, 2018
Series 2013-2A securities (2)	1,289,478			1,288,689			March 15, 2023
Series 2015-1 notes (3)	346,685			346,262			June 15, 2020
Series 2015-2 notes (4)	519,106			518,776			June 16, 2025
2012 GTP notes (5)	182,233			281,902			March 15, 2019
Unison notes (6)	201,054			201,930			Various
Viom indebtedness (7)	698,274			—			Various
Viom preference shares (8)	24,682			—			Various
Shareholder loans (9)	154,387			145,540			Various
BR Towers debentures (10)	105,191			85,219			October 15, 2023
Colombian credit facility (11)	61,060			59,640			April 24, 2021
South African facility (12)	50,230			53,175			December 17, 2020
Brazil credit facility (13)	31,293			21,868			January 15, 2022
Indian working capital facility (14)	5,688			8,752			July 31, 2016
Total American Tower subsidiary debt	4,167,421			3,509,231
2013 Credit Facility	72,203			1,225,000			June 28, 2019
Term Loan	1,994,238			1,993,601			January 29, 2021
2014 Credit Facility	1,840,000			1,980,000			January 29, 2021
4.500% senior notes	997,944			997,693			January 15, 2018
3.40% senior notes	999,532			999,769			February 15, 2019
7.25% senior notes	296,389			296,242			May 15, 2019
2.800% senior notes	744,239			743,557			June 1, 2020
5.050% senior notes	696,916			697,216			September 1, 2020
3.300% senior notes	744,121			—			February 15, 2021
3.450% senior notes	643,216			642,786			September 15, 2021
5.900% senior notes	497,037			497,188			November 1, 2021
4.70% senior notes	695,671			695,374			March 15, 2022
3.50% senior notes	988,231			987,966			January 31, 2023
5.00% senior notes	1,002,735			1,003,453			February 15, 2024
4.000% senior notes	739,539			739,057			June 1, 2025
4.400% senior notes	494,957			—			February 15, 2026
3.375% senior notes	982,645			—			October 15, 2026
Total American Tower Corporation debt	14,429,613			13,498,902
Other debt, including capital lease obligations	120,042			110,876
Total	18,717,076			17,119,009
Less current portion of long-term obligations	(314,063		)	(50,202		)
Long-term obligations	$	18,403,013		$	17,068,807

_______________

(1)    Maturity date represents anticipated repayment date; final legal maturity is March 15, 2043.

(2)    Maturity date represents anticipated repayment date; final legal maturity is March 15, 2048.

(3) Maturity date represents anticipated repayment date; final legal maturity is June 15, 2045.

(4) Maturity date represents anticipated repayment date; final legal maturity is June 15, 2050.

(5) Secured debt assumed by the Company in connection with its acquisition of MIP Tower Holdings LLC. Maturity date represents anticipated repayment date; final legal maturity is March 15, 2042. During the six months ended June 30, 2016, the Company repaid the $94.1 million outstanding under the Secured Tower Cellular Site Revenue Notes, Series 2012-1 Class A and released 472 sites in connection with the repayment.

(6) Secured debt assumed by the Company in connection with its acquisition of certain legal entities from Unison Holdings LLC and Unison Site Management II, L.L.C. Anticipated repayment dates begin April 15, 2017; final legal maturity date is April 15, 2040.

(7) Debt primarily assumed by the Company in connection with the Viom Acquisition. Maturity dates begin March 31, 2017. In June 2016, the Company refinanced 4.75 billion Indian Rupees (“INR”) of Viom assumed indebtedness with a new short-term committed loan facility with a borrowing capacity of 5.80 billion INR ($85.9 million as of June 30, 2016). Denominated in INR.

(8) Mandatorily redeemable preference shares issued by Viom. The shares are to be redeemed in equal parts on March 26, 2017 and March 26, 2018.

(9) Reflects balances owed to the Company’s joint venture partners in Ghana and Uganda. The Ghana loan is denominated in Ghanaian Cedi and the Uganda loan is denominated in U.S. Dollars.

(10) Publicly issued debentures assumed by the Company in connection with its acquisition of BR Towers S.A. Denominated in Brazilian Reais (“BRL”).

(11) Denominated in Colombian Pesos and amortizes through April 24, 2021.

(12) Denominated in South African Rand and amortizes through December 17, 2020.

(13) Denominated in BRL.

(14) Denominated in INR. This agreement provides that the maturity date may be extended for additional 30-day periods.

Schedule of line of credit facilities

As of June 30, 2016, the key terms under the 2013 Credit Facility, the 2014 Credit Facility and the Company’s unsecured term loan entered into in October 2013, as amended (the “Term Loan”) were as follows:

	Outstanding Principal Balance (in millions)		Undrawn letters of credit (in millions)		Maturity Date	Current margin over LIBOR (1)		Current commitment fee (2)
2013 Credit Facility	$	72.2	$	3.2	June 28, 2019 (3)	1.250	%	0.150	%
2014 Credit Facility	$	1,840.0	$	7.4	January 29, 2021 (3)	1.250	%	0.150	%
Term Loan	$	2,000.0	N/A		January 29, 2021	1.250	%	N/A

_______________

(1)    LIBOR means the London Interbank Offered Rate.

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

(3)    Subject to two optional renewal periods.

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FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2016

Fair Value Disclosures [Abstract]

Schedule of fair value

The fair value of the Company’s financial assets and liabilities that are required to be measured on a recurring basis at fair value was as follows (in thousands):

	June 30, 2016				December 31, 2015
	Fair Value Measurements Using				Fair Value Measurements Using
	Level 2		Level 3		Level 2		Level 3
Assets:
Interest rate swap agreements	$	751	—		$	692	—
Embedded derivative in lease agreement	—		$	13,735	—		$	14,176
Liabilities:
Acquisition-related contingent consideration	—		$	12,225	—		$	12,436

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STOCK-BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2016

Share-based Compensation, Allocation and Classification in Financial Statements [Abstract]

Assumptions used to determine the grant date fair value for options granted

Key assumptions used to apply this pricing model during the six months ended June 30, 2016 were as follows:

Range of risk-free interest rate	1.45% - 1.73%
Weighted average risk-free interest rate	1.45%
Range of expected life of stock options	4.5 - 5.2 years
Range of expected volatility of the underlying stock price	20.64% - 21.45%
Weighted average expected volatility of underlying stock price	21.45%
Range of expected annual dividend yield	1.85% - 2.40%

Summary of the company's option activity

The Company’s option activity for the six months ended June 30, 2016 was as follows:

	Number of Options
Outstanding as of January 1, 2016	7,680,819
Granted	1,132,596
Exercised	(907,829	)
Forfeited	(16,320	)
Expired	(500	)
Outstanding as of June 30, 2016	7,888,766

Summary of the company's restricted stock unit activity

The Company’s RSU and PSU activity for the six months ended June 30, 2016 was as follows:

	RSUs		PSUs
Outstanding as of January 1, 2016 (1)	1,656,993		33,377
Granted (2)	767,421		192,719
Vested	(635,126	)	—
Forfeited	(54,053	)	—
Outstanding as of June 30, 2016	1,735,235		226,096

_______________

(1) PSUs represent the shares issuable for the 2015 PSUs at the end of the three-year performance cycle based on exceeding the performance metric for the first year’s performance period.

(2) PSUs represent the target number of shares issuable at the end of the three-year performance cycle attributable to the second year’s performance period for the 2015 PSUs and the target number of shares issuable at the end of the three-year performance cycle for the 2016 PSUs.

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REDEEMABLE NONCONTROLLING INTERESTS (Tables)

6 Months Ended

Jun. 30, 2016

Noncontrolling Interest [Abstract]

Reconciliation of the changes in the redeemable noncontrolling items

The following is a reconciliation of the changes in the Redeemable noncontrolling interests (in thousands):

Balance as of January 1, 2016	$	—
Fair value at acquisition	1,097,841
Net income attributable to noncontrolling interests	4,323
Foreign currency translation adjustment attributable to noncontrolling interests	(17,007		)
Balance as of June 30, 2016	$	1,085,157

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EQUITY (Tables)

6 Months Ended

Jun. 30, 2016

Stockholders' Equity Attributable to Parent [Abstract]

Schedule of declared or paid cash distributions

During the six months ended June 30, 2016, the Company declared or paid the following cash distributions:

Declaration Date	Payment Date	Record Date	Distribution per share		Aggregate Payment Amount (in millions)
Common Stock
December 3, 2015	January 13, 2016	December 16, 2015	$	0.49	$	207.7
March 9, 2016	April 28, 2016	April 12, 2016	$	0.51	$	216.5
June 2, 2016	July 15, 2016	June 17, 2016	$	0.53	$	225.4
Series A Preferred Stock
January 14, 2016	February 16, 2016	February 1, 2016	$	1.3125	$	7.9
April 16, 2016	May 16, 2016	May 1, 2016	$	1.3125	$	7.9
Series B Preferred Stock
January 14, 2016	February 16, 2016	February 1, 2016	$	13.75	$	18.9
April 16, 2016	May 16, 2016	May 1, 2016	$	13.75	$	18.9

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EARNINGS PER COMMON SHARE (Tables)

6 Months Ended

Jun. 30, 2016

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 (in thousands, except per share data):

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Net income attributable to American Tower Corporation stockholders	$	187,550		$	156,056		$	462,709		$	349,373
Dividends on preferred stock	(26,782		)	(26,782		)	(53,563		)	(36,601		)
Net income attributable to American Tower Corporation common stockholders	160,768			129,274			409,146			312,772
Basic weighted average common shares outstanding	424,909			423,154			424,484			414,182
Dilutive securities	4,095			3,779			4,045			4,121
Diluted weighted average common shares outstanding	429,004			426,933			428,529			418,303
Basic net income attributable to American Tower Corporation common stockholders per common share	$	0.38		$	0.31		$	0.96		$	0.76
Diluted net income attributable to American Tower Corporation common stockholders per common share	$	0.37		$	0.30		$	0.95		$	0.75

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 June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
Restricted stock awards	—	—	1	—
Stock options	1,120	1,734	1,974	1,229
Preferred stock	17,444	17,349	17,444	13,364

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COMMITMENTS AND CONTINGENCIES (TABLES)

6 Months Ended

Jun. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Future minimum rental receipts under operating lease agreements

Future minimum rental receipts expected from tenants under non-cancellable operating lease agreements in effect at June 30, 2016 were as follows (in millions):

Remainder of 2016	$	2,424
2017	4,594
2018	4,413
2019	4,149
2020	3,794
Thereafter	12,485
Total	$	31,859

Future minimum rental payments under non-cancelable operating leases

Future minimum rental payments under non-cancellable operating leases include payments for certain renewal periods at the Company’s option because failure to renew could result in a loss of the applicable communications sites and related revenues from tenant leases, thereby making it reasonably assured that the Company will renew the leases. Such payments at June 30, 2016 are as follows (in millions):

Remainder of 2016	$	461
2017	889
2018	863
2019	829
2020	790
Thereafter	7,329
Total	$	11,161

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ACQUISITIONS (Tables)

6 Months Ended

Jun. 30, 2016

Business Combinations [Abstract]

Schedule of merger and acquisition related costs

During the three and six months ended June 30, 2016 and 2015, the Company recorded acquisition and merger related expenses and integration costs as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Acquisition and merger related expenses	$	5,735	$	5,021	$	6,720	$	7,987
Integration costs	$	3,234	$	4,525	$	6,505	$	6,280

Schedule of recognized identified assets acquired and liabilities assumed

The following table summarizes the preliminary allocation of the purchase price for the fiscal year 2016 acquisitions based upon their estimated fair value at the date of acquisition (in thousands). Balances are reflected in the accompanying consolidated balance sheet as of June 30, 2016.

	Asia			Other
	Viom
Current assets	$	283,854		$	6,050
Non-current assets	45,962			—
Property and equipment	765,127			24,251
Intangible assets (1):
Customer-related intangible assets	1,364,466			36,314
Network location intangible assets	639,438			8,928
Current liabilities	(180,734		)	(55		)
Deferred tax liability	(635,529		)	—
Other non-current liabilities	(105,458		)	(3,833		)
Net assets acquired	2,177,126			71,655
Goodwill (2)	856,110			8,104
Fair value of net assets acquired	3,033,236			79,759
Debt assumed	(786,889		)	—
Redeemable noncontrolling interests	(1,097,841		)	—
Purchase Price (3)	$	1,148,506		$	79,759

_______________

(1) Customer-related intangible assets and network location intangible assets are amortized on a straight-line basis over periods of up to 20 years.

(2) Primarily results from purchase accounting adjustments which are not deductible for tax purposes.

(3) Other includes contingent consideration of $0.1 million.

The following table summarizes the preliminary and updated allocations of the purchase prices paid and the amounts of assets acquired and liabilities assumed for the fiscal year 2015 acquisitions based upon their estimated fair value at the date of acquisition (in thousands).

	Preliminary Allocation			Updated Allocation (1)
	Latin America			Latin America
	TIM			TIM
Current assets	$	—		$	—
Non-current assets	—			—
Property and equipment	275,630			275,570
Intangible assets (2):
Customer-related intangible assets	361,822			361,048
Network location intangible assets	115,562			115,577
Current liabilities	(3,192		)	(3,192		)
Deferred tax liability	—			—
Other non-current liabilities	(74,966		)	(74,966		)
Net assets acquired	674,856			674,037
Goodwill	122,011			122,011
Fair value of net assets acquired	796,867			796,048
Debt assumed	—			—
Purchase Price	$	796,867		$	796,048

_______________

(1) The allocation of the purchase price related to the initial 4,176 communications sites acquired from TIM on April 29, 2015 was finalized during the six months ended June 30, 2016.

(2) Customer-related intangible assets and network location intangible assets are amortized on a straight-line basis over periods of up to 20 years.

Schedule of pro forma information

The following table presents the unaudited pro forma financial results as if the 2016 acquisitions had occurred on January 1, 2015 and acquisitions completed in 2015 had occurred on January 1, 2014. The pro forma results do not include any anticipated cost synergies, costs or other integration impacts. Accordingly, such pro forma amounts are not necessarily indicative of the results that actually would have occurred had the transactions been completed on the date indicated, nor are they indicative of the future operating results of the Company.

	Three Months Ended June 30,				Six Months Ended June 30,
	2016		2015		2016		2015
Pro forma revenues	$	1,489,485	$	1,447,850	$	2,976,772	$	2,918,700
Pro forma net income attributable to American Tower Corporation common stockholders	$	164,191	$	129,154	$	408,945	$	280,165
Pro forma net income per common share amounts:
Basic net income attributable to American Tower Corporation common stockholders	$	0.39	$	0.31	$	0.96	$	0.66
Diluted net income attributable to American Tower Corporation common stockholders	$	0.38	$	0.30	$	0.95	$	0.66

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BUSINESS SEGMENTS (Tables)

6 Months Ended

Jun. 30, 2016

Segment Reporting, Measurement Disclosures [Abstract]

Summarized financial information concerning the company's reportable segments

Summarized financial information concerning the Company’s reportable segments for the three and six months ended June 30, 2016 and 2015 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, as the amounts are not utilized in assessing each segment’s performance.

	Property								Total  Property		Services		Other		Total
Three Months Ended June 30, 2016	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	829,680	$	224,611	$	134,762	$	237,139	$	1,426,192	$	16,035			$	1,442,227
Segment operating expenses (1)	182,376		127,855		58,462		83,486		452,179		6,885				459,064
Interest income, TV Azteca, net	—		—		—		2,748		2,748		—				2,748
Segment gross margin	647,304		96,756		76,300		156,401		976,761		9,150				985,911
Segment selling, general, administrative and development expense (1)	34,721		14,770		16,685		15,031		81,207		3,346				84,553
Segment operating profit	$	612,583	$	81,986	$	59,615	$	141,370	$	895,554	$	5,804			$	901,358
Stock-based compensation expense													$	21,907	21,907
Other selling, general, administrative and development expense													32,421		32,421
Depreciation, amortization and accretion													397,765		397,765
Other expense (2)													213,291		213,291
Income from continuing operations before income taxes															$	235,974
Total assets	$	18,949,936	$	4,557,692	$	2,025,767	$	4,929,052	$	30,462,447	$	62,766	$	214,985	$	30,740,198

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $0.6 million and $21.3 million, respectively.

(2)    Primarily includes interest expense.

	Property								Total  Property		Services		Other		Total
Three Months Ended June 30, 2015	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	802,841	$	60,009	$	70,408	$	220,977	$	1,154,235	$	20,140			$	1,174,375
Segment operating expenses (1)	182,172		31,628		24,198		75,897		313,895		8,075				321,970
Interest income, TV Azteca, net	—		—		—		2,662		2,662		—				2,662
Segment gross margin	620,669		28,381		46,210		147,742		843,002		12,065				855,067
Segment selling, general, administrative and development expense (1)	31,243		4,480		11,952		12,990		60,665		3,439				64,104
Segment operating profit	$	589,426	$	23,901	$	34,258	$	134,752	$	782,337	$	8,626			$	790,963
Stock-based compensation expense													$	24,045	24,045
Other selling, general, administrative and development expense (2)													28,677		28,677
Depreciation, amortization and accretion													328,356		328,356
Other expense (3)													238,749		238,749
Income from continuing operations before income taxes															$	171,136
Total assets (4)	$	19,383,596	$	748,268	$	1,159,978	$	4,930,775	$	26,222,617	$	71,268	$	175,840	$	26,469,725

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $0.5 million and $23.6 million, respectively.

(2) Includes $0.6 million of expense previously recorded as segment selling, general, administrative and development expense.

(3) Primarily includes interest expense and loss on retirement of long-term obligations.

(4) $21.2 million of assets previously recorded within the Asia, EMEA, and Latin America Property segments have been reclassified to the Other segment.

	Property								Total  Property		Services		Other		Total
Six Months Ended June 30, 2016	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	1,681,424	$	287,827	$	264,402	$	460,190	$	2,693,843	$	37,431			$	2,731,274
Segment operating expenses (1)	360,098		160,935		114,121		158,808		793,962		15,889				809,851
Interest income, TV Azteca, net	—		—		—		5,464		5,464		—				5,464
Segment gross margin	1,321,326		126,892		150,281		306,846		1,905,345		21,542				1,926,887
Segment selling, general, administrative and development expense (1)	72,007		21,346		32,837		29,615		155,805		6,262				162,067
Segment operating profit	$	1,249,319	$	105,546	$	117,444	$	277,231	$	1,749,540	$	15,280			$	1,764,820
Stock-based compensation expense													$	49,986	49,986
Other selling, general, administrative and development expense													62,801		62,801
Depreciation, amortization and accretion													739,399		739,399
Other expense (2)													366,229		366,229
Income from continuing operations before income taxes															$	546,405

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $1.3 million and $48.7 million, respectively.

(2) Primarily includes interest expense.

	Property								Total  Property		Services		Other		Total
Six Months Ended June 30, 2015	U.S.		Asia		EMEA		Latin America
	(in thousands)
Segment revenues	$	1,520,721	$	117,136	$	146,209	$	432,349	$	2,216,415	$	37,150			$	2,253,565
Segment operating expenses (1)	315,204		61,288		52,713		143,515		572,720		13,319				586,039
Interest income, TV Azteca, net	—		—		—		5,258		5,258		—				5,258
Segment gross margin	1,205,517		55,848		93,496		294,092		1,648,953		23,831				1,672,784
Segment selling, general, administrative and development expense (1)	58,065		11,309		20,811		30,252		120,437		6,875				127,312
Segment operating profit	$	1,147,452	$	44,539	$	72,685	$	263,840	$	1,528,516	$	16,956			$	1,545,472
Stock-based compensation expense													$	53,906	53,906
Other selling, general, administrative and development expense (2)													59,469		59,469
Depreciation, amortization and accretion													591,876		591,876
Other expense (3)													449,721		449,721
Income from continuing operations before income taxes															$	390,500

_______________

(1) Segment operating expenses and segment selling, general, administrative and development expenses exclude stock-based compensation expense of $1.1 million and $52.8 million, respectively.

(2)    Includes $2.2 million of expense previously recorded as segment selling, general, administrative and development expense.

(3)    Primarily includes interest expense and loss on retirement of long-term obligations.

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DESCRIPTION OF BUSINESS, BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	6 Months Ended
	Jun. 30, 2016 joint_venture	Apr. 21, 2016 site system
Concentration Risk [Line Items]
Number of joint ventures the Company has a controlling interest in (in joint ventures) | joint_venture	2
Joint Venture, Ghana And Uganda
Concentration Risk [Line Items]
Ownership interest (as a percent)	51.00%
Noncontrolling interest, ownership percentage by noncontrolling owners (as a percent)	49.00%
Joint Venture, South Africa
Concentration Risk [Line Items]
Ownership interest (as a percent)	75.00%
Noncontrolling interest, ownership percentage by noncontrolling owners (as a percent)	25.00%
ATC, TIPL
Concentration Risk [Line Items]
Ownership interest (as a percent)	51.00%
Viom Transaction
Concentration Risk [Line Items]
Percentage of voting interest acquired (as a percent)		51.00%
Number of communications sites acquired (in number of towers) | site		42,000
Distributed antenna systems acquired (systems) | system		200

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PREPAID AND OTHER CURRENT ASSETS (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid income tax	$ 151,828	$ 45,056
Prepaid operating ground leases	132,629	128,542
Unbilled receivables	59,124	34,173
Prepaid assets	59,063	32,892
Value added tax and other consumption tax receivables	32,258	30,239
Other miscellaneous current assets	46,977	35,333
Total	$ 481,879	$ 306,235

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GOODWILL AND OTHER INTANGIBLE ASSETS - CHANGES IN THE CARRYING VALUE OF GOODWILL (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 4,091,805
Additions	864,214
Effect of foreign currency translation	25,900
Goodwill, ending balance	4,981,919
Services
Goodwill [Roll Forward]
Goodwill, beginning balance	1,988
Additions	0
Effect of foreign currency translation	0
Goodwill, ending balance	1,988
United States | Property
Goodwill [Roll Forward]
Goodwill, beginning balance	3,379,163
Additions	289
Effect of foreign currency translation	0
Goodwill, ending balance	3,379,452
Asia | Property
Goodwill [Roll Forward]
Goodwill, beginning balance	170,719
Additions	856,110
Effect of foreign currency translation	(16,714)
Goodwill, ending balance	1,010,115
EMEA | Property
Goodwill [Roll Forward]
Goodwill, beginning balance	132,570
Additions	3,200
Effect of foreign currency translation	(18,417)
Goodwill, ending balance	117,353
Latin America | Property
Goodwill [Roll Forward]
Goodwill, beginning balance	407,365
Additions	4,615
Effect of foreign currency translation	61,031
Goodwill, ending balance	473,011
Viom Transaction
Goodwill [Roll Forward]
Goodwill, ending balance	$ 856,100

XML

GOODWILL AND OTHER INTANGIBLE ASSETS - SUMMARY OF INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 14,777,552	$ 12,670,816
Accumulated Amortization	(3,186,860)	(2,832,940)
Net Book Value	11,590,692	9,837,876
Acquired Network Location
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	4,589,425	3,980,281
Accumulated Amortization	(1,175,676)	(1,052,393)
Net Book Value	$ 3,413,749	$ 2,927,888
Finite-lived intangible asset, useful life (in years)	20 years	20 years
Acquired Network Location | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (in years)	0 years
Acquired Network Location | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (in years)	20 years	20 years
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 10,139,104	$ 8,640,554
Accumulated Amortization	(1,996,896)	(1,763,853)
Net Book Value	$ 8,142,208	$ 6,876,701
Finite-lived intangible asset, useful life (in years)	20 years	20 years
Customer Relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (in years)	15 years
Customer Relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (in years)	20 years
Acquired Licenses And Other Intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 28,756	$ 28,293
Accumulated Amortization	(3,725)	(5,486)
Net Book Value	$ 25,031	22,807
Acquired Licenses And Other Intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (in years)	3 years
Acquired Licenses And Other Intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life (in years)	20 years
Economic Rights, TV Azteca
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 20,267	21,688
Accumulated Amortization	(10,563)	(11,208)
Net Book Value	$ 9,704	$ 10,480
Finite-lived intangible asset, useful life (in years)	70 years

XML

GOODWILL AND OTHER INTANGIBLE ASSETS - EXPECTED FUTURE AMORTIZAITON EXPENSE (Details) $ in Millions	Jun. 30, 2016 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2016	$ 356.6
2017	710.8
2018	708.6
2019	705.6
2020	686.8
2021	$ 677.5

XML

GOODWILL AND OTHER INTANGIBLE ASSETS - NARRATIVE (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 185.3	$ 147.6	$ 337.1	$ 258.1
Weighted Average
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, remaining amortization period			16 years

XML

ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accrued Liabilities, Current [Abstract]
Accrued property and real estate taxes	$ 108,636	$ 75,827
Accrued income tax payable	70,490	11,704
Payroll and related withholdings	52,844	62,334
Accrued rent	50,449	54,732
Accrued construction costs	16,550	19,857
Other accrued expenses	318,742	291,959
Total	$ 617,711	$ 516,413

XML

LONG-TERM OBLIGATIONS - LONG-TERM FINANCING ARRANGEMENTS (Details) $ in Thousands, ₨ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($) site	Jun. 30, 2016 INR (₨)	May 13, 2016	Apr. 21, 2016 USD ($)	Apr. 21, 2016 INR (₨)	Jan. 12, 2016	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Other debt, including capital lease obligations	$ 120,042						$ 110,876
Debt, long-term and short-term, combined amount	18,717,076						17,119,009
Less current portion long-term obligations	(314,063)						(50,202)
Long-term debt, excluding current maturities	18,403,013						17,068,807
Subsidiaries
Debt Instrument [Line Items]
Long-term debt	4,167,421						3,509,231
Parent
Debt Instrument [Line Items]
Long-term debt	14,429,613						13,498,902
GTP Notes
Debt Instrument [Line Items]
Repayments of secured debt	$ 94,100
Number of sites released upon repayment (in sites) | site	472
Colombian Long Term Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	$ 61,060						59,640
South African Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt	50,230						53,175
Brazil Credit Facility
Debt Instrument [Line Items]
Long-term debt	31,293						21,868
Indian Facility
Debt Instrument [Line Items]
Long-term debt	5,688						8,752
Credit Facility 2013 | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit	72,203						1,225,000
Credit Facility 2014 | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit	1,840,000						1,980,000
Secured Debt | Commercial Mortgage Pass Through Certificates Series 2013 | Secured Tower Revenue Securities, Series 2013-1A
Debt Instrument [Line Items]
Long-term debt	498,060						497,478
Secured Debt | Commercial Mortgage Pass Through Certificates Series 2013 | Secured Tower Revenue Securities, Series 2013-2A
Debt Instrument [Line Items]
Long-term debt	1,289,478						1,288,689
Secured Debt | Series 2015-1 Class A
Debt Instrument [Line Items]
Long-term debt	346,685						346,262
Secured Debt | Series 2015-2 Class A
Debt Instrument [Line Items]
Long-term debt	519,106						518,776
Secured Debt | GTP Notes
Debt Instrument [Line Items]
Long-term debt	182,233						281,902
Secured Debt | Secured Cellular Site Revenue Notes
Debt Instrument [Line Items]
Long-term debt	201,054						201,930
Secured Debt | BR Towers Debentures
Debt Instrument [Line Items]
Long-term debt	105,191						85,219
Secured Debt | Viom Term Loan
Debt Instrument [Line Items]
Long-term debt	$ 588,600	₨ 39,745
Secured Debt | Viom Term Loan | Minimum
Debt Instrument [Line Items]
Long-term debt, stated interest rate (as a percent)	8.75%	8.75%
Secured Debt | Viom Term Loan | Maximum
Debt Instrument [Line Items]
Long-term debt, stated interest rate (as a percent)	11.20%	11.20%
Secured Debt | Viom Debenture
Debt Instrument [Line Items]
Long-term debt	$ 88,900	₨ 6,000
Long-term debt, stated interest rate (as a percent)	9.90%	9.90%
Unsecured Debt | Viom Debt
Debt Instrument [Line Items]
Long-term debt	$ 698,274						0
Less current portion long-term obligations	(70,300)	₨ (4,750)
Unsecured Debt | Shareholder Loans
Debt Instrument [Line Items]
Long-term debt	154,387						145,540
Unsecured Debt | Term Loan 2013
Debt Instrument [Line Items]
Long-term debt	1,994,238						1,993,601
Preferred Stock | Viom preferred shares
Debt Instrument [Line Items]
Long-term debt	24,682						0
Senior Notes | 4.50% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 997,944						$ 997,693
Long-term debt, stated interest rate (as a percent)	4.50%	4.50%					4.50%
Senior Notes | 3.40% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 999,532						$ 999,769
Long-term debt, stated interest rate (as a percent)	3.40%	3.40%					3.40%
Senior Notes | 7.25% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 296,389						$ 296,242
Long-term debt, stated interest rate (as a percent)	7.25%	7.25%					7.25%
Senior Notes | 2.80% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 744,239						$ 743,557
Long-term debt, stated interest rate (as a percent)	2.80%	2.80%					2.80%
Senior Notes | 5.05% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 696,916						$ 697,216
Long-term debt, stated interest rate (as a percent)	5.05%	5.05%					5.05%
Senior Notes | 3.30% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 744,121						$ 0
Long-term debt, stated interest rate (as a percent)	3.30%	3.30%				3.30%	3.30%
Senior Notes | 3.450% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 643,216						$ 642,786
Long-term debt, stated interest rate (as a percent)	3.45%	3.45%					3.45%
Senior Notes | 5.90% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 497,037						$ 497,188
Long-term debt, stated interest rate (as a percent)	5.90%	5.90%					5.90%
Senior Notes | 4.70% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 695,671						$ 695,374
Long-term debt, stated interest rate (as a percent)	4.70%	4.70%					4.70%
Senior Notes | 3.50% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 988,231						$ 987,966
Long-term debt, stated interest rate (as a percent)	3.50%	3.50%					3.50%
Senior Notes | 5.00% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 1,002,735						$ 1,003,453
Long-term debt, stated interest rate (as a percent)	5.00%	5.00%					5.00%
Senior Notes | 4.00% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 739,539						$ 739,057
Long-term debt, stated interest rate (as a percent)	4.00%	4.00%					4.00%
Senior Notes | 4.40% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 494,957						$ 0
Long-term debt, stated interest rate (as a percent)	4.40%	4.40%				4.40%	4.40%
Senior Notes | 3.375% Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 982,645						$ 0
Long-term debt, stated interest rate (as a percent)	3.375%	3.375%	3.375%				3.375%
Line of Credit | Viom Working Capital Facilities
Debt Instrument [Line Items]
Long-term debt	$ 20,800	₨ 1,406
Line of Credit | Viom Working Capital Facilities | Minimum
Debt Instrument [Line Items]
Long-term debt, stated interest rate (as a percent)	11.05%	11.05%
Line of Credit | Viom Working Capital Facilities | Maximum
Debt Instrument [Line Items]
Long-term debt, stated interest rate (as a percent)	11.60%	11.60%
Viom Transaction
Debt Instrument [Line Items]
Less current portion long-term obligations	$ (194,700)	₨ (13,100)
Viom Transaction | Viom Debt
Debt Instrument [Line Items]
Fair value of debt assumed through acquisitions				$ 85,900	₨ 5,800

XML

LONG-TERM OBLIGATIONS - SCHEDULE OF LINES OF CREDIT (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2016 USD ($)	Dec. 31, 2015 renewal_period
Credit Facility 2013 | Revolving Credit Facility
Line of Credit Facility [Line Items]
Undrawn letters of credit	$ 3.2
Current commitment fee	0.15%
Credit Facility 2013 | Unsecured Debt
Line of Credit Facility [Line Items]
Outstanding Principal Balance	$ 72.2
Credit Facility 2013 | Unsecured Debt | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Current margin over LIBOR (as a percent)	1.25%
Credit Facility 2014 | Revolving Credit Facility
Line of Credit Facility [Line Items]
Undrawn letters of credit	$ 7.4
Current commitment fee	0.15%
Number of annual renewal periods | renewal_period		2
Credit Facility 2014 | Unsecured Debt
Line of Credit Facility [Line Items]
Outstanding Principal Balance	$ 1,840.0
Credit Facility 2014 | Unsecured Debt | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Current margin over LIBOR (as a percent)	1.25%
Term Loan 2013 | Unsecured Debt
Line of Credit Facility [Line Items]
Outstanding Principal Balance	$ 2,000.0
Term Loan 2013 | Unsecured Debt | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Current margin over LIBOR (as a percent)	1.25%

XML

LONG-TERM OBLIGATIONS - NARRATIVE (Details) ₨ / shares in Units, $ in Thousands, ₨ in Millions				6 Months Ended
	Jul. 15, 2016 USD ($)	May 13, 2016 USD ($)	Jan. 12, 2016 USD ($)	Jun. 30, 2016 USD ($) installment shares	Jun. 30, 2015 USD ($)	Jun. 30, 2016 INR (₨) ₨ / shares shares	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Current portion of long-term obligations				$ 314,063			$ 50,202
Borrowings under credit facilities				1,326,866	$ 4,740,308
Credit Facility 2013 | Revolving Credit Facility
Debt Instrument [Line Items]
Borrowings under credit facilities				1,200,000
Repayment of indebtedness under credit facility				2,400,000
Credit Facility 2013 | Revolving Credit Facility | Subsequent Event
Debt Instrument [Line Items]
Borrowings under credit facilities	$ 110,000
Credit Facility 2014 | Revolving Credit Facility
Debt Instrument [Line Items]
Borrowings under credit facilities				80,000
Repayment of indebtedness under credit facility				220,000
Unsecured Debt | Viom Debt
Debt Instrument [Line Items]
Current portion of long-term obligations				70,300		₨ 4,750
Unsecured Debt | Credit Facility 2013
Debt Instrument [Line Items]
Principal amount				72,200
Unsecured Debt | Credit Facility 2014
Debt Instrument [Line Items]
Principal amount				$ 1,840,000
Secured Debt | Viom Term Loan | Minimum
Debt Instrument [Line Items]
Debt instrument, term (in years)				1 year
Prepayment penalty, as a percent of principal (as a percent)				1.00%
Repayment period (in months)				6 months
Long-term debt, stated interest rate (as a percent)				8.75%		8.75%
Secured Debt | Viom Term Loan | Maximum
Debt Instrument [Line Items]
Debt instrument, term (in years)				10 years
Prepayment penalty, as a percent of principal (as a percent)				2.00%
Repayment period (in months)				36 months
Long-term debt, stated interest rate (as a percent)				11.20%		11.20%
Secured Debt | Viom Term Loan | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.00%
Secured Debt | Viom Term Loan | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.55%
Secured Debt | Viom Term Loan | Marginal Cost of Funds based Lending Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.00%
Secured Debt | Viom Term Loan | Marginal Cost of Funds based Lending Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.55%
Secured Debt | Viom Debenture
Debt Instrument [Line Items]
Long-term debt, stated interest rate (as a percent)				9.90%		9.90%
Secured Debt | Viom Debenture | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				0.60%
Basis spread on variable rate, reset rate (as a percent)				10.00%
Basis spread on variable rate, first reset period (as a percent)				36 months
Basis spread on variable rate, second reset period (as a percent)				48 months
Secured Debt | Viom Debenture | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate, reset threshold (as a percent)				9.75%
Secured Debt | Viom Debenture | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate, reset threshold (as a percent)				10.25%
Secured Debt | Secured Cellular Site Revenue Notes, Series 2010-1 Class C
Debt Instrument [Line Items]
Current portion of long-term obligations				$ 67,400
Line of Credit | Viom Working Capital Facilities | Minimum
Debt Instrument [Line Items]
Long-term debt, stated interest rate (as a percent)				11.05%		11.05%
Line of Credit | Viom Working Capital Facilities | Maximum
Debt Instrument [Line Items]
Long-term debt, stated interest rate (as a percent)				11.60%		11.60%
Line of Credit | Viom Working Capital Facilities | Base Rate | Minimum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				1.60%
Line of Credit | Viom Working Capital Facilities | Base Rate | Maximum
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)				2.30%
Preferred Stock | Viom preferred shares
Debt Instrument [Line Items]
Preferred stock, shares outstanding | shares				166,666,666		166,666,666
Number of redemption installments | installment				2
Preferred stock, redemption price (in INR per share) | ₨ / shares						₨ 10
Preferred stock, dividend rate percentage (in percent)				13.50%
Financial instrument, maximum settlement amount				$ 24,700		₨ 1,670
Financial instrument, maximum settlement amount classified as short term debt				$ 12,300		₨ 800
Redemption price (as a percent)				2.00%
Senior Notes
Debt Instrument [Line Items]
Maximum Adjusted EBITDA				3.5		3.5
Senior Notes | 3.30% and 4.40% Senior Notes
Debt Instrument [Line Items]
Proceeds from the issuance of debt			$ 1,237,200
Senior Notes | 3.30% Senior Notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate (as a percent)			3.30%	3.30%		3.30%	3.30%
Principal amount			$ 750,000
Senior Notes | 4.40% Senior Notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate (as a percent)			4.40%	4.40%		4.40%	4.40%
Principal amount			$ 500,000
Senior Notes | 3.375% Senior Notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate (as a percent)		3.375%		3.375%		3.375%	3.375%
Principal amount		$ 1,000,000
Proceeds from the issuance of debt		$ 981,500
Senior Notes | Senior Notes
Debt Instrument [Line Items]
Redemption price (as a percent)				100.00%
Conditional repurchase price as percent of principal				101.00%		101.00%
Viom Transaction
Debt Instrument [Line Items]
Current portion of long-term obligations				$ 194,700		₨ 13,100

XML

FAIR VALUE MEASUREMENTS - ASSETS AND LIABILITIES MEASURED AT FAIR VALUE ON A RECURRING BASIS (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Embedded derivative in lease agreement	$ 13,735	$ 14,176
Acquisition-related contingent consideration	12,225	12,436
Interest Rate Swap | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	$ 751	$ 692

XML

FAIR VALUE MEASUREMENTS - NARRATIVE (Details) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business combination, contingent consideration arrangements, range of outcomes, value, low	$ 0
Business combination, contingent consideration arrangements, range of outcomes, value, high	26,300,000
Acquired mandatory redeemable preference shares (in shares)	1,085,157,000	$ 0
Debt, long-term and short-term, combined amount	18,717,076,000	17,119,009,000
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	19,500,000,000	17,400,000,000
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	11,300,000,000	8,700,000,000
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	$ 8,200,000,000	$ 8,700,000,000

XML

INCOME TAXES - NARRATIVE (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Income Tax Contingency [Line Items]
Unrecognized tax benefits, increase resulting from current period tax positions	$ 32,800,000		$ 39,300,000
Unrecognized tax benefits, increase resulting from acquisition	23,800,000		23,800,000
Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation	400,000		1,200,000
Unrecognized tax benefits, income tax penalties and interest	2,200,000	$ 600,000	5,200,000	$ 1,500,000
Unrecognized tax benefits, income tax penalties and interest accrued	25,000,000		25,000,000		$ 20,200,000
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	14,100,000		14,100,000
Other Noncurrent Liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would impact the ETR	$ 68,600,000		$ 68,600,000		$ 28,100,000

XML

STOCK-BASED COMPENSATION - ASSUMPTIONS USED TO DETERMINE THE GRANT DATE FAIR VALUE FOR OPTIONS GRANTED (Details) - Employee Stock Option	6 Months Ended
	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum range of risk-free interest rate	1.45%
Maximum range of risk-free interest rate	1.73%
Weighted average risk-free interest rate	1.45%
Minimum range of expected volatility of underlying stock price	20.64%
Maximum range of expected volatility of underlying stock price	21.45%
Weighted average expected volatility of underlying stock price	21.45%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of expected life of stock options	4 years 6 months
Range of expected annual dividend yield	1.85%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of expected life of stock options	5 years 2 months 12 days
Range of expected annual dividend yield	2.40%

XML

STOCK-BASED COMPENSATION - SUMMARY OF THE COMPANY'S OPTION ACTIVITY (Details) - Employee Stock Option	6 Months Ended
	Jun. 30, 2016 shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding as of January 1, 2016 (in shares)	7,680,819
Granted (in shares)	1,132,596
Exercised (in shares)	(907,829)
Forfeited (in shares)	(16,320)
Expired (in shares)	(500)
Outstanding as of June 30, 2016 (in shares)	7,888,766

XML

STOCK-BASED COMPENSATION - SUMMARY OF THE COMPANY'S RESTRICTED STOCK UNIT ACTIVITY (Details) - shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding as of January 1, 2016 (in shares)	1,656,993
Granted (in shares)	767,421
Vested (in shares)	(635,126)
Forfeited (in shares)	(54,053)
Outstanding as of June 30, 2016 (in shares)	1,656,993	1,735,235
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Outstanding as of January 1, 2016 (in shares)	33,377
Granted (in shares)	192,719
Vested (in shares)	0
Forfeited (in shares)	0
Outstanding as of June 30, 2016 (in shares)	33,377	226,096
Vesting period	3 years
2007 Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Vesting period	4 years
2007 Plan | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Vesting period	3 years

XML

STOCK-BASED COMPENSATION - NARRATIVE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP, discount rate (as a percent)			15.00%
Stock-based compensation expense	$ 21,907	$ 24,045	$ 49,986	$ 53,906
Capitalized stock-based compensation expense	100	$ 600	$ 800	$ 1,100
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Stock-based compensation expense	2,400		$ 3,200
Total unrecognized compensation expense	16,600		$ 16,600
Expected recognition of stock award compensation expense weighted average period in years			2 years
Three year performance grant, shares granted			169,340	70,135
Shares granted, grant date fair value not yet established			23,377
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%
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (in dollars per share)			$ 14.56
Total unrecognized compensation expense	34,800		$ 34,800
Expected recognition of stock award compensation expense weighted average period in years			2 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation expense	$ 115,600		$ 115,600
Expected recognition of stock award compensation expense weighted average period in years			3 years
2007 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares issuable under stock incentive plan	9,400,000		9,400,000
2007 Plan | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
2007 Plan | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years
Expiration period			10 years
2007 Plan | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years

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REDEEMABLE NONCONTROLLING INTERESTS (Details) - 6 months ended Jun. 30, 2016 $ in Thousands	USD ($)	₨ / shares
Noncontrolling Interest [Abstract]
Temporary equity, redemption price per share (in dollars per share) | ₨ / shares		₨ 216
Changes In Redeemable Noncontrolling Interests [Roll Forward]
Balance as of January 1, 2016	$ 0
Fair value at acquisition	1,097,841
Net income attributable to noncontrolling interests	4,323
Foreign currency translation adjustment attributable to noncontrolling interests	(17,007)
Balance as of June 30, 2016	$ 1,085,157

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EQUITY - DISTRIBUTIONS (Detail) - USD ($) $ / shares in Units, $ in Thousands						3 Months Ended		6 Months Ended
	Jun. 02, 2016	Apr. 16, 2016	Mar. 09, 2016	Jan. 14, 2016	Dec. 03, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Dividends Payable [Line Items]
Distribution per common share (in dollars per share)						$ 0.53	$ 0.44	$ 1.04	$ 0.86
Distributions paid on common stock								$ 426,564	$ 329,766
Distributions paid on preferred stock								$ 53,563	$ 31,085
Common Stock
Dividends Payable [Line Items]
Distribution per common share (in dollars per share)	$ 0.53		$ 0.51		$ 0.49
Distributions paid on common stock	$ 225,400		$ 216,500		$ 207,700
Convertible Preferred Stock Subject to Mandatory Redemption | Series A Preferred Stock
Dividends Payable [Line Items]
Distribution per preferred share (in dollars per share)		$ 1.3125		$ 1.3125
Distributions paid on preferred stock		$ 7,900		$ 7,900
Convertible Preferred Stock Subject to Mandatory Redemption | Series B Preferred Stock
Dividends Payable [Line Items]
Distribution per preferred share (in dollars per share)		$ 13.75		$ 13.75
Distributions paid on preferred stock		$ 18,900		$ 18,900

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EQUITY - NARRATIVE (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Class of Stock [Line Items]
Proceeds from stock options and ESPP	$ 60,361	$ 17,364
Accrued dividend RSU	4,800
Dividends Declared and Paid
Class of Stock [Line Items]
Paid dividend RSU	$ 2,400
Series B Preferred Stock
Class of Stock [Line Items]
Depository shares, percentage of preferred shares	0.1
Convertible Preferred Stock Subject to Mandatory Redemption | Series A Preferred Stock | Minimum
Class of Stock [Line Items]
Conversion factor, preferred stock	0.9272
Convertible Preferred Stock Subject to Mandatory Redemption | Series A Preferred Stock | Maximum
Class of Stock [Line Items]
Conversion factor, preferred stock	1.1591
Convertible Preferred Stock Subject to Mandatory Redemption | Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, liquidation preference per share (in dollars per share)	$ 1,000.00
Shares issued, price per share (in dollars per share)	$ 100.00
Convertible Preferred Stock Subject to Mandatory Redemption | Series B Preferred Stock | Minimum
Class of Stock [Line Items]
Conversion factor, preferred stock	8.5911
Convertible Preferred Stock Subject to Mandatory Redemption | Series B Preferred Stock | Maximum
Class of Stock [Line Items]
Conversion factor, preferred stock	10.3093
Convertible Preferred Stock Subject to Mandatory Redemption | Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.01		$ 0.01
Convertible Preferred Stock Subject to Mandatory Redemption | Preferred Stock | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued	6,000,000		6,000,000
Preferred stock, dividend rate percentage (in percent)	5.25%		5.25%
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, liquidation preference per share (in dollars per share)	$ 100.00
Convertible Preferred Stock Subject to Mandatory Redemption | Preferred Stock | Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued	1,375,000		1,375,000
Preferred stock, dividend rate percentage (in percent)	5.50%		5.50%
Preferred stock, par value (in dollars per share)	$ 0.01
Depository shares, amount issued	13,750,000

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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 Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Net income attributable to American Tower Corporation stockholders	$ 187,550	$ 156,056	$ 462,709	$ 349,373
Dividends on preferred stock	(26,782)	(26,782)	(53,563)	(36,601)
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS	$ 160,768	$ 129,274	$ 409,146	$ 312,772
Basic weighted average common shares outstanding (in shares)	424,909	423,154	424,484	414,182
Dilutive securities (in shares)	4,095	3,779	4,045	4,121
Diluted weighted average common shares outstanding (in shares)	429,004	426,933	428,529	418,303
Basic net income attributable to American Tower Corporation common stockholders per common share (in dollars per share)	$ 0.38	$ 0.31	$ 0.96	$ 0.76
Diluted net income attributable to American Tower Corporation common stockholders per common share (in dollars per share)	$ 0.37	$ 0.30	$ 0.95	$ 0.75

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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		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares issuable upon conversion of the stock-based awards and convertible notes	0	0	1	0
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares issuable upon conversion of the stock-based awards and convertible notes	1,120	1,734	1,974	1,229
Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares issuable upon conversion of the stock-based awards and convertible notes	17,444	17,349	17,444	13,364

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COMMITMENTS AND CONTINGENCIES - FUTURE MINIMUM RENTAL RECEIPTS UNDER OPERATING LEASE AGREEMENTS (Details) $ in Millions	Jun. 30, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remainder of 2016	$ 2,424
2017	4,594
2018	4,413
2019	4,149
2020	3,794
Thereafter	12,485
Total	$ 31,859

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COMMITMENTS AND CONTINGENCIES - FUTURE MINIMUM RENTAL PAYMENTS UNDER NON-CANCELABLE OPERATING LEASES (Details) $ in Millions	Jun. 30, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remainder of 2016	$ 461
2017	889
2018	863
2019	829
2020	790
Thereafter	7,329
Total	$ 11,161

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COMMITMENTS AND CONTINGENCIES - NARRATIVE (Details)		1 Months Ended	6 Months Ended
	Mar. 27, 2015 USD ($) communications_site renewal_period	Dec. 31, 2000 tower	Jun. 30, 2016 USD ($) tower renewal_period shares
Loss Contingencies [Line Items]
Lessor agreements, term of contract			10 years
Verizon Transaction
Loss Contingencies [Line Items]
Capital leased assets, number of units (in number of communication sites) | communications_site	11,286
Right to lease, weighted average term	28 years
Aggregate purchase option price for towers | $	$ 5,000,000,000
Customer lease, initial term	10 years
Successive terms to renew lease (in numbers of terms) | renewal_period	8
Renewal term	5 years
AT&T Transaction
Loss Contingencies [Line Items]
Capital leased assets, number of units (in number of communication sites) | tower			2,370
Aggregate purchase option price for towers | $			$ 730,500,000
Successive terms to renew lease (in numbers of terms) | renewal_period			4
Operating lease, term of contract			27 years
Number of communications sites acquired (in number of towers) | tower			60
Purchase price accretion rate (per year)			10.00%
AT&T Transaction | Commitments prior to June 30, 2020
Loss Contingencies [Line Items]
Renewal term			5 years
AT&T Transaction | Commitments subsequent to June 30, 2020
Loss Contingencies [Line Items]
Renewal term			1 year
ALLTEL Transaction
Loss Contingencies [Line Items]
Capital leased assets, number of units (in number of communication sites) | tower		1,800
Aggregate purchase option price for towers | $			$ 75,700,000
Number of communications sites acquired (in number of towers) | tower			1,525
Average lease term (in years)		15 years
Cash purchase price per tower | $			$ 42,844
Purchase price of tower in shares of common stock (in shares) | shares			769

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ACQUISITIONS - SCHEDULE OF MERGER AND ACQUISITION RELATED COSTS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Business Combinations [Abstract]
Acquisition and merger related expenses	$ 5,735	$ 5,021	$ 6,720	$ 7,987
Integration costs	$ 3,234	$ 4,525	$ 6,505	$ 6,280

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ACQUISITIONS - SCHEDULE OF PRELIMINARY ALLOCATION OF THE PURCHASE PRICE (Details) $ in Thousands, ₨ in Billions						6 Months Ended	12 Months Ended
	Apr. 21, 2016 USD ($) site	Apr. 21, 2016 INR (₨) site	Dec. 16, 2015 USD ($) communications_site	Sep. 30, 2015 USD ($) communications_site	Apr. 29, 2015 USD ($) communications_site	Jun. 30, 2016 USD ($) site	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Goodwill						$ 4,981,919	$ 4,091,805
Customer Relationships
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life (in years)						20 years	20 years
Acquired Network Location
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life (in years)						20 years	20 years
Viom Transaction
Business Acquisition [Line Items]
Goodwill						$ 856,100
Debt assumed	$ (800,000)	₨ (52.3)
Number of communications sites acquired (in number of towers) | site	42,000	42,000
Viom Transaction | Preliminary Purchase Price Allocation
Business Acquisition [Line Items]
Current assets						283,854
Non-current assets						45,962
Property and equipment						765,127
Finite-Lived Customer Relationships, Gross						1,364,466
Finite Lived Network Intangible Gross						639,438
Current liabilities						(180,734)
Deferred tax liability						(635,529)
Other non-current liabilities						(105,458)
Net assets acquired						2,177,126
Goodwill						856,110
Fair value of net assets acquired						3,033,236
Debt assumed						(786,889)
Redeemable noncontrolling interests						(1,097,841)
Purchase Price	$ 1,100,000	₨ 76.4				$ 1,148,506
Other Acquisition 2016
Business Acquisition [Line Items]
Number of communications sites acquired (in number of towers) | site						433
Other Acquisition 2016 | Preliminary Purchase Price Allocation
Business Acquisition [Line Items]
Current assets						$ 6,050
Non-current assets						0
Property and equipment						24,251
Finite-Lived Customer Relationships, Gross						36,314
Finite Lived Network Intangible Gross						8,928
Current liabilities						(55)
Deferred tax liability						0
Other non-current liabilities						(3,833)
Net assets acquired						71,655
Goodwill						8,104
Fair value of net assets acquired						79,759
Debt assumed						0
Redeemable noncontrolling interests						0
Purchase Price						79,759
TIM Acquisition
Business Acquisition [Line Items]
Number of communications sites acquired (in number of towers) | communications_site			182	1,125	4,176
TIM Acquisition | Preliminary Purchase Price Allocation
Business Acquisition [Line Items]
Current assets							$ 0
Non-current assets							0
Property and equipment							275,630
Finite-Lived Customer Relationships, Gross							361,822
Finite Lived Network Intangible Gross							115,562
Current liabilities							(3,192)
Deferred tax liability							0
Other non-current liabilities							(74,966)
Net assets acquired							674,856
Goodwill							122,011
Fair value of net assets acquired							796,867
Debt assumed							0
Purchase Price			$ 21,700	$ 130,900	$ 644,300		$ 796,867
TIM Acquisition | Adjusted Purchase Price Allocation
Business Acquisition [Line Items]
Current assets						0
Non-current assets						0
Property and equipment						275,570
Finite-Lived Customer Relationships, Gross						361,048
Finite Lived Network Intangible Gross						115,577
Current liabilities						(3,192)
Deferred tax liability						0
Other non-current liabilities						(74,966)
Net assets acquired						674,037
Goodwill						122,011
Fair value of net assets acquired						796,048
Debt assumed						0
Purchase Price						$ 796,048

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ACQUISITIONS - PRO FORMA INFORMATION (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition, Pro Forma Information [Abstract]
Pro forma operating revenues	$ 1,489,485	$ 1,447,850	$ 2,976,772	$ 2,918,700
Pro forma net income attributable to American Tower Corporation	$ 164,191	$ 129,154	$ 408,945	$ 280,165
Basic net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 0.39	$ 0.31	$ 0.96	$ 0.66
Diluted net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 0.38	$ 0.30	$ 0.95	$ 0.66

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ACQUISITIONS - NARRATIVE (Details) $ in Thousands, ₨ in Billions							3 Months Ended	6 Months Ended	12 Months Ended
	Apr. 21, 2016 USD ($) site system	Apr. 21, 2016 INR (₨)	Mar. 17, 2016 USD ($) site	Dec. 16, 2015 USD ($) communications_site	Sep. 30, 2015 USD ($) communications_site	Apr. 29, 2015 USD ($) communications_site	Jun. 30, 2016 USD ($) site	Jun. 30, 2016 USD ($) site	Dec. 31, 2015 USD ($)	Apr. 21, 2016 INR (₨) site system
Business Acquisition [Line Items]
Revenue of acquiree since acquisition date							$ 158,000	$ 158,000
Gross margin of acquiree since acquisition date							65,200	65,200
Acquired mandatory redeemable preference shares (in shares)							1,085,157	1,085,157	$ 0
Viom Transaction
Business Acquisition [Line Items]
Percentage of voting interest acquired (as a percent)	51.00%									51.00%
Number of communications sites acquired (in number of towers) | site	42,000									42,000
Distributed antenna systems acquired (systems) | system	200									200
Fair value of debt assumed through acquisitions	$ 800,000	₨ 52.3
Acquisition-related contingent consideration							$ 100	100
Viom Transaction | Preliminary Purchase Price Allocation
Business Acquisition [Line Items]
Purchase Price	1,100,000	₨ 76.4						1,148,506
Fair value of debt assumed through acquisitions								$ 786,889
Viom Transaction | Mandatorily Redeemable Preferred Stock
Business Acquisition [Line Items]
Acquired mandatory redeemable preference shares (in shares)	$ 25,100									₨ 1.7
Other Acquisition 2016
Business Acquisition [Line Items]
Number of communications sites acquired (in number of towers) | site							433	433
Acquisition-related contingent consideration							$ 100	$ 100
Other Acquisition 2016 | Preliminary Purchase Price Allocation
Business Acquisition [Line Items]
Purchase Price								79,759
Fair value of debt assumed through acquisitions								0
TIM Acquisition
Business Acquisition [Line Items]
Number of communications sites acquired (in number of towers) | communications_site				182	1,125	4,176
Aggregate purchase price adjustment								$ (800)
TIM Acquisition | Preliminary Purchase Price Allocation
Business Acquisition [Line Items]
Purchase Price				$ 21,700	$ 130,900	$ 644,300			796,867
Fair value of debt assumed through acquisitions									$ 0
Airtel Tanzania
Business Acquisition [Line Items]
Number of communications sites acquired (in number of towers) | site			1,350
Airtel Tanzania | Preliminary Purchase Price Allocation
Business Acquisition [Line Items]
Purchase Price			$ 179,000
Additional sites to be acquired | site			100

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BUSINESS SEGMENTS - SUMMARIZED FINANCIAL INFORMATION CONCERNING THE COMPANY'S REPORTABLE SEGMENTS (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) segment	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($) segment
Segment Reporting, Measurement Disclosures [Abstract]
Number of reportable segments | segment			5		3
Segment Reporting Information [Line Items]
Segment revenues	$ 1,442,227	$ 1,174,375	$ 2,731,274	$ 2,253,565
Segment operating expenses	459,064	321,970	809,851	586,039
Segment gross margin	985,911	855,067	1,926,887	1,672,784
Segment selling, general, administrative and development expense	84,553	64,104	162,067	127,312
Segment operating profit	901,358	790,963	1,764,820	1,545,472
Stock-based compensation expense	21,907	24,045	49,986	53,906
Other selling, general, administrative and development expense	32,421	28,677	62,801	59,469
Depreciation, amortization and accretion	397,765	328,356	739,399	591,876
Other expense	213,291	238,749	366,229	449,721
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	235,974	171,136	546,405	390,500
Total assets	30,740,198	26,469,725	30,740,198	26,469,725	$ 26,904,272
Selling General Administrative And Development Expense
Segment Reporting Information [Line Items]
Stock-based compensation expense	21,260	23,557	48,681	52,847
Operating Expense
Segment Reporting Information [Line Items]
Stock-based compensation expense	600	500	1,300	1,100
TV Azteca
Segment Reporting Information [Line Items]
Interest income, TV Azteca, net	2,748	2,662	5,464	5,258
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Amount previously recorded as segment selling, general and administrative expense		600		2,200
Corporate, Non-Segment | Restatement Adjustment
Segment Reporting Information [Line Items]
Total assets		21,200		21,200
Operating Segments | Property
Segment Reporting Information [Line Items]
Segment revenues	1,426,192	1,154,235	2,693,843	2,216,415
Segment operating expenses	452,179	313,895	793,962	572,720
Segment gross margin	976,761	843,002	1,905,345	1,648,953
Segment selling, general, administrative and development expense	81,207	60,665	155,805	120,437
Segment operating profit	895,554	782,337	1,749,540	1,528,516
Total assets	30,462,447	26,222,617	30,462,447	26,222,617
Operating Segments | Property | TV Azteca
Segment Reporting Information [Line Items]
Interest income, TV Azteca, net	2,748	2,662	5,464	5,258
Operating Segments | Property | United States
Segment Reporting Information [Line Items]
Segment revenues	829,680	802,841	1,681,424	1,520,721
Segment operating expenses	182,376	182,172	360,098	315,204
Segment gross margin	647,304	620,669	1,321,326	1,205,517
Segment selling, general, administrative and development expense	34,721	31,243	72,007	58,065
Segment operating profit	612,583	589,426	1,249,319	1,147,452
Total assets	18,949,936	19,383,596	18,949,936	19,383,596
Operating Segments | Property | United States | TV Azteca
Segment Reporting Information [Line Items]
Interest income, TV Azteca, net	0	0	0	0
Operating Segments | Property | Asia
Segment Reporting Information [Line Items]
Segment revenues	224,611	60,009	287,827	117,136
Segment operating expenses	127,855	31,628	160,935	61,288
Segment gross margin	96,756	28,381	126,892	55,848
Segment selling, general, administrative and development expense	14,770	4,480	21,346	11,309
Segment operating profit	81,986	23,901	105,546	44,539
Total assets	4,557,692	748,268	4,557,692	748,268
Operating Segments | Property | Asia | TV Azteca
Segment Reporting Information [Line Items]
Interest income, TV Azteca, net	0	0	0	0
Operating Segments | Property | EMEA
Segment Reporting Information [Line Items]
Segment revenues	134,762	70,408	264,402	146,209
Segment operating expenses	58,462	24,198	114,121	52,713
Segment gross margin	76,300	46,210	150,281	93,496
Segment selling, general, administrative and development expense	16,685	11,952	32,837	20,811
Segment operating profit	59,615	34,258	117,444	72,685
Total assets	2,025,767	1,159,978	2,025,767	1,159,978
Operating Segments | Property | EMEA | TV Azteca
Segment Reporting Information [Line Items]
Interest income, TV Azteca, net	0	0	0	0
Operating Segments | Property | Latin America
Segment Reporting Information [Line Items]
Segment revenues	237,139	220,977	460,190	432,349
Segment operating expenses	83,486	75,897	158,808	143,515
Segment gross margin	156,401	147,742	306,846	294,092
Segment selling, general, administrative and development expense	15,031	12,990	29,615	30,252
Segment operating profit	141,370	134,752	277,231	263,840
Total assets	4,929,052	4,930,775	4,929,052	4,930,775
Operating Segments | Property | Latin America | TV Azteca
Segment Reporting Information [Line Items]
Interest income, TV Azteca, net	2,748	2,662	5,464	5,258
Operating Segments | Services
Segment Reporting Information [Line Items]
Segment revenues	16,035	20,140	37,431	37,150
Segment operating expenses	6,885	8,075	15,889	13,319
Segment gross margin	9,150	12,065	21,542	23,831
Segment selling, general, administrative and development expense	3,346	3,439	6,262	6,875
Segment operating profit	5,804	8,626	15,280	16,956
Total assets	62,766	71,268	62,766	71,268
Operating Segments | Services | TV Azteca
Segment Reporting Information [Line Items]
Interest income, TV Azteca, net	0	0	0	0
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Stock-based compensation expense	21,907	24,045	49,986	53,906
Other selling, general, administrative and development expense	32,421	28,677	62,801	59,469
Depreciation, amortization and accretion	397,765	328,356	739,399	591,876
Other expense	213,291	238,749	366,229	449,721
Total assets	$ 214,985	$ 175,840	$ 214,985	$ 175,840