CONSOLIDATED HIGHLIGHTS

First Quarter 2021

• Total revenue increased 8.3% to $2,159 million
• Property revenue increased 7.9% to $2,130 million
• Net income increased 55.8% to $652 million
• Adjusted EBITDA increased 13.3% to $1,440 million
• Consolidated AFFO increased 23.8% to $1,123 million

American Tower Corporation (NYSE: AMT) today reported financial results for the quarter ended March 31, 2021.

Tom Bartlett, American Tower’s Chief Executive Officer, stated, “We began 2021 by entering into the Telxius Towers transaction, which we expect to be transformational for our European business. Our global teams followed that by delivering a strong quarter, highlighted by elevated demand for our sites, the construction of nearly 2,000 new towers and highly attractive growth in Consolidated AFFO per Share.

Looking forward, in the U.S., we expect that the gathering 5G momentum will enable us to leverage our extensive site portfolio and mutually beneficial relationships with key tenants to drive sustainable, predictable, recurring long-term growth in cash flows. Internationally, large multinational carriers are aggressively investing in their wireless networks to keep pace with rapidly growing mobile data usage as smartphone penetration accelerates and network technologies advance. On a global basis, we believe we are optimally positioned to drive strong growth and compelling total returns for years to come while helping connect billions of people.”

CONSOLIDATED OPERATING RESULTS OVERVIEW

American Tower generated the following operating results for the quarter ended March 31, 2021 (all comparative information is presented against the quarter ended March 31, 2020).

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Please refer to “Non-GAAP and Defined Financial Measures” below for definitions and other information regarding the Company’s use of non-GAAP measures. For financial information and reconciliations to GAAP measures, please refer to the “Unaudited Selected Consolidated Financial Information” below.

CAPITAL ALLOCATION OVERVIEW

Distributions – During the quarter ended March 31, 2021, the Company declared the following regular cash distributions to its common stockholders:

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Capital Expenditures – During the first quarter of 2021, total capital expenditures were approximately $335 million, of which $19 million was for non-discretionary capital improvements and corporate capital expenditures. For additional capital expenditure details, please refer to the supplemental disclosure package available on the Company’s website.

Acquisitions – During the first quarter of 2021, the Company spent approximately $115 million to acquire 116 communications sites, including 48 sites in the U.S. and 68 sites in Latin America.

On January 13, 2021, the Company entered into definitive agreements with Telxius Telecom, S.A. (“Telxius”), a subsidiary of Telefónica, S.A., pursuant to which the Company expects to acquire Telxius’ European and Latin American tower divisions, comprising approximately 31,000 communications sites in Argentina, Brazil, Chile, Germany, Peru and Spain, for approximately €7.7 billion (approximately $9.4 billion at the date of signing) (the “Pending Telxius Acquisition”), subject to certain adjustments. As of April 28, 2021, the Company has received all required government and regulatory approvals in Germany and Spain and expects to close on the majority of the European sites in the second quarter of 2021, with approximately 4,000 sites in Germany expected to close in the third quarter of 2021. The Latin American sites are expected to close either late in the second quarter or in the third quarter of 2021, subject to customary closing conditions, including government and regulatory approval.

Other Events – In February 2021, the Company entered into an agreement with Macquarie SBI Infrastructure Investments Pte Limited and SBI Macquarie Infrastructure Trust (together, “Macquarie”) to redeem 100% of their combined holdings in ATC Telecom Infrastructure Private Limited (“ATC TIPL”). Accordingly, the Company expects to pay an amount equivalent to INR 12.9 billion (approximately $176.5 million at the March 31, 2021 exchange rate) to redeem the shares in 2021, subject to regulatory approval. After the completion of the redemption, the Company will hold a 100% ownership interest in ATC TIPL.

Additionally, during the first quarter of 2021, the Company entered into a master lease agreement (“MLA”) with DISH Network Corporation (“DISH”). Cash lease payments from DISH under the MLA will commence in 2022 and grow over time as DISH’s network deployment progresses.

LEVERAGE AND FINANCING OVERVIEW

Leverage – For the quarter ended March 31, 2021, the Company’s Net Leverage Ratio was 4.8x net debt (total debt less cash and cash equivalents) to first quarter 2021 annualized Adjusted EBITDA.

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Liquidity and Financing Activities – As of March 31, 2021, the Company had nearly $6.3 billion of total liquidity, consisting of $1.9 billion in cash and cash equivalents plus the ability to borrow an aggregate of approximately $4.4 billion under its revolving credit facilities, net of any outstanding letters of credit.

During the first quarter of 2021, the Company issued $1.4 billion in senior unsecured notes. The net proceeds were used to repay existing indebtedness. In addition, during the quarter, the Company upsized its multicurrency credit facility to $4.1 billion and its revolving credit facility to $2.9 billion. The Company also entered into a €1.1 billion 364-day delayed draw term loan and an €825.0 million three year delayed draw term loan and reduced the size of its bridge commitment with Bank of America N.A. and BofA Securities, Inc. from €7.5 billion to €4.275 billion.

FULL YEAR 2021 OUTLOOK

The following full year 2021 estimates are based on a number of assumptions that management believes to be reasonable and reflect the Company’s expectations as of April 29, 2021. Actual results may differ materially from these estimates as a result of various factors, and the Company refers you to the cautionary language regarding “forward-looking” statements included in this press release when considering this information. The Company’s outlook does not include any impact from the Pending Telxius Acquisition.

As of April 29, 2021, based on currently available information, the Company does not anticipate significant impacts to its underlying operating results in 2021 as a result of the coronavirus (“COVID-19”) pandemic. This is subject to change depending on future developments, which are highly uncertain and cannot be predicted at this time. Additional information pertaining to the impact of COVID-19 on the Company can be found in our Form 10-K for the twelve months ended December 31, 2020.

The Company’s outlook is based on the following average foreign currency exchange rates to 1.00 U.S. Dollar for April 29, 2021 through December 31, 2021: (a) 114 Argentinean Pesos; (b) 1.31 Australian Dollars (c) 5.65 Brazilian Reais; (d) 1.26 Canadian Dollars (e) 730 Chilean Pesos; (f) 3,650 Colombian Pesos; (g) 0.84 Euros; (h) 5.85 Ghanaian Cedis; (i) 73.80 Indian Rupees; (j) 112 Kenyan Shillings; (k) 20.40 Mexican Pesos; (l) 415 Nigerian Naira; (m) 6,390 Paraguayan Guarani; (n) 3.70 Peruvian Soles; (o) 3.85 Polish Zloty; (p) 14.75 South African Rand; (q) 3,690 Ugandan Shillings; and (r) 550 West African CFA Francs.

The Company is lowering the midpoint of its full year 2021 outlook for property revenue by $25 million as a result of unfavorable translational foreign currency exchange rate fluctuations, while raising the midpoints of its outlook for net income, Adjusted EBITDA and Consolidated AFFO by $110 million, $10 million and $25 million, respectively.

The Company’s outlook reflects estimated unfavorable impacts of foreign currency exchange rate fluctuations to property revenue, Adjusted EBITDA and Consolidated AFFO of approximately $48 million, $30 million and $25 million, respectively, relative to the Company’s prior 2021 outlook. The impact of foreign currency exchange rate fluctuations on net income is not provided, as the impact on all components of the net income measure cannot be calculated without unreasonable effort.

Additional information pertaining to the impact of foreign currency and London Interbank Offered Rate (“LIBOR”) fluctuations on the Company’s outlook has been provided in the supplemental disclosure package available on the Company’s website.

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Conference Call Information

American Tower will host a conference call today at 8:30 a.m. ET to discuss its financial results for the quarter ended March 31, 2021 and its revised outlook for 2021. Supplemental materials for the call will be available on the Company’s website, www.americantower.com. The conference call dial-in numbers are as follows:

U.S./Canada dial-in: (877) 692-8955

International dial-in: (234) 720-6979

Passcode: 8422355

When available, a replay of the call can be accessed until 11:59 p.m. ET on May 13, 2021. The replay dial-in numbers are as follows:

U.S./Canada dial-in: (866) 207-1041

International dial-in: (402) 970-0847

Passcode: 3563599

American Tower will also sponsor a live simulcast and replay of the call on its website, www.americantower.com.

About American Tower

American Tower, one of the largest global REITs, is a leading independent owner, operator and developer of multitenant communications real estate with a portfolio of approximately 187,000 communications sites. For more information about American Tower, please visit the “Earnings Materials” and “Investor Presentations” sections of our investor relations website at www.americantower.com.

Non-GAAP and Defined Financial Measures

In addition to the results prepared in accordance with generally accepted accounting principles in the United States (GAAP) provided throughout this press release, the Company has presented the following Non-GAAP and Defined Financial Measures: Gross Margin, Operating Profit, Operating Profit Margin, Adjusted EBITDA, Adjusted EBITDA Margin, Nareit Funds From Operations (FFO) attributable to American Tower Corporation common stockholders, Consolidated Adjusted Funds From Operations (AFFO), AFFO attributable to American Tower Corporation common stockholders, Consolidated AFFO per Share, AFFO attributable to American Tower Corporation common stockholders per Share, Free Cash Flow, Net Debt, Net Leverage Ratio and Indian Carrier Consolidation-Driven Churn (ICCC). In addition, the Company presents: Tenant Billings, Tenant Billings Growth, Organic Tenant Billings Growth and New Site Tenant Billings Growth.

These measures are not intended to replace financial performance measures determined in accordance with GAAP. Rather, they are presented as additional information because management believes they are useful indicators of the current financial performance of the Company's core businesses and are commonly used across its industry peer group. As outlined in detail below, the Company believes that these measures can assist in comparing company performance on a consistent basis irrespective of depreciation and amortization or capital structure, while also providing valuable incremental insight into the underlying operating trends of its business.

Depreciation and amortization can vary significantly among companies depending on accounting methods, particularly where acquisitions or non-operating factors, including historical cost basis, are involved. The Company's Non-GAAP and Defined Financial Measures may not be comparable to similarly titled measures used by other companies.

Revenue Components

In addition to reporting total revenue, the Company believes that providing transparency around the components of its revenue provides investors with insight into the indicators of the underlying demand for, and operating performance of, its real estate portfolio. Accordingly, the Company has provided disclosure of the following revenue components: (i) Tenant Billings, (ii) New Site Tenant Billings; (iii) Organic Tenant Billings; (iv) International pass-through revenue; (v) Straight-line revenue; (vi) Pre-paid amortization revenue; (vii) Foreign currency exchange impact; and (viii) Other revenue.

Tenant Billings: The majority of the Company’s revenue is generated from non-cancellable, long-term tenant leases. Revenue from Tenant Billings reflects several key aspects of the Company’s real estate business: (i) “colocations/amendments” reflects new tenant leases for space on existing sites and amendments to existing leases to add additional tenant equipment; (ii) “escalations” reflects contractual increases in billing rates, which are typically tied to fixed percentages or a variable percentage based on a consumer price index; (iii) “cancellations” reflects the impact of tenant lease terminations or non-renewals or, in limited circumstances, when the lease rates on existing leases are reduced; and (iv) “new sites” reflects the impact of new property construction and acquisitions.

New Site Tenant Billings: Day-one Tenant Billings associated with sites that have been built or acquired since the beginning of the prior-year period. Incremental colocations/amendments, escalations or cancellations that occur on these sites after the date of their addition to our portfolio are not included in New Site Tenant Billings. The Company believes providing New Site Tenant Billings enhances an investor’s ability to analyze the Company’s existing real estate portfolio growth as well as its development program growth, as the Company’s construction and acquisition activities can drive variability in growth rates from period to period.

Organic Tenant Billings: Tenant Billings on sites that the Company has owned since the beginning of the prior-year period, as well as Tenant Billings activity on new sites that occurred after the date of their addition to the Company’s portfolio.

International pass-through revenue: A portion of the Company’s pass-through revenue is based on power and fuel expense reimbursements and therefore subject to fluctuations in fuel prices. As a result, revenue growth rates may fluctuate depending on the market price for fuel in any given period, which is not representative of the Company’s real estate business and its economic exposure to power and fuel costs. Furthermore, this expense reimbursement mitigates the economic impact associated with fluctuations in operating expenses, such as power and fuel costs and land rents in certain of the Company’s markets. As a result, the Company believes that it is appropriate to provide insight into the impact of pass-through revenue on certain revenue growth rates.

Straight-line revenue: Under GAAP, the Company recognizes revenue on a straight-line basis over the term of the contract for certain of its tenant leases. Due to the Company’s significant base of non-cancellable, long-term tenant leases, this can result in significant fluctuations in growth rates upon tenant lease signings and renewals (typically increases), when amounts billed or received upfront upon these events are initially deferred. These signings and renewals are only a portion of the Company’s underlying business growth and can distort the underlying performance of our Tenant Billings Growth. As a result, the Company believes that it is appropriate to provide insight into the impact of straight-line revenue on certain growth rates in revenue and select other measures.

Pre-paid amortization revenue: The Company recovers a portion of the costs it incurs for the redevelopment and development of its properties from its tenants. These upfront payments are then amortized over the initial term of the corresponding tenant lease. Given this amortization is not necessarily directly representative of underlying leasing activity on its real estate portfolio (i.e. does not have a renewal option or escalation as our tenant leases do), the Company believes that it is appropriate to provide insight into the impact of pre-paid amortization revenue on certain revenue growth rates to provide transparency into the underlying performance of our real estate business.

Foreign currency exchange impact: The majority of the Company’s international revenue and operating expenses are denominated in each country’s local currency. As a result, foreign currency fluctuations may distort the underlying performance of our real estate business from period to period, depending on the movement of foreign currency exchange rates versus the U.S. Dollar. The Company believes it is appropriate to quantify the impact of foreign currency exchange rate fluctuations on its reported growth to provide transparency into the underlying performance of its real estate business.

Other revenue: Other revenue represents revenue not captured by the above listed items and can include items such as tenant settlements and fiber solutions revenue.

Non-GAAP and Defined Financial Measure Definitions

Tenant Billings Growth: The increase or decrease resulting from a comparison of Tenant Billings for a current period with Tenant Billings for the corresponding prior-year period, in each case adjusted for foreign currency exchange rate fluctuations. The Company believes this measure provides valuable insight into the growth in recurring Tenant Billings and underlying demand for its real estate portfolio.

Organic Tenant Billings Growth: The portion of Tenant Billings Growth attributable to Organic Tenant Billings. The Company believes that organic growth is a useful measure of its ability to add tenancy and incremental revenue to its assets for the reported period, which enables investors and analysts to gain additional insight into the relative attractiveness, and therefore the value, of the Company’s property assets.

New Site Tenant Billings Growth: The portion of Tenant Billings Growth attributable to New Site Tenant Billings. The Company believes this measure provides valuable insight into the growth attributable to Tenant Billings from recently acquired or constructed properties.

Indian Carrier Consolidation-Driven Churn (ICCC): Tenant cancellations specifically attributable to short-term carrier consolidation in India. Includes impacts of carrier exits from the marketplace and carrier cancellations as a result of consolidation, but excludes normal course churn. In prior periods, the Company provided this additional metric to enhance transparency and provide a better understanding of its recurring business.

Gross Margin: Revenues less 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 believes this measure provides valuable insight into the site-level profitability of its assets.

Operating Profit: Gross Margin less selling, general, administrative and development expense, excluding stock-based compensation expense and corporate expenses. The Company believes this measure provides valuable insight into the site-level profitability of its assets while also taking into account the overhead expenses required to manage each of its operating segments.

Operating Profit Margin: The percentage that results from dividing Operating Profit by revenue.

Adjusted EBITDA: Net income before income (loss) from equity method investments, income tax benefit (provision), other income (expense), gain (loss) on retirement of long-term obligations, interest expense, interest income, other operating income (expense), depreciation, amortization and accretion and stock-based compensation expense. The Company believes this measure provides valuable insight into the profitability of its operations while at the same time taking into account the central overhead expenses required to manage its global operations. In addition, it is a widely used performance measure across the telecommunications real estate sector.

Adjusted EBITDA Margin: The percentage that results from dividing Adjusted EBITDA by total revenue.

Nareit Funds From Operations (FFO), as defined by the National Association of Real Estate Investment Trusts (Nareit), attributable to American Tower Corporation common stockholders: Net income before gains or losses from the sale or disposal of real estate, real estate related impairment charges, real estate related depreciation, amortization and accretion and dividends on preferred stock, and including adjustments for (i) unconsolidated affiliates and (ii) noncontrolling interests. The Company believes this measure provides valuable insight into the operating performance of its property assets by excluding the charges described above, particularly depreciation expenses, given the high initial, up-front capital intensity of the Company’s operating model. In addition, it is a widely used performance measure across the telecommunications real estate sector.

Consolidated Adjusted Funds From Operations (AFFO): Nareit FFO attributable to American Tower Corporation common stockholders before (i) straight-line revenue and expense, (ii) stock-based compensation expense, (iii) the deferred portion of income tax, (iv) non-real estate related depreciation, amortization and accretion, (v) amortization of deferred financing costs, capitalized interest, debt discounts and premiums and long-term deferred interest charges, (vi) other income (expense), (vii) gain (loss) on retirement of long-term obligations, (viii) other operating income (expense), and adjustments for (ix) unconsolidated affiliates and (x) noncontrolling interests, less cash payments related to capital improvements and cash payments related to corporate capital expenditures. The Company believes this measure provides valuable insight into the operating performance of its property assets by further adjusting the Nareit FFO attributable to American Tower Corporation common stockholders metric to exclude the factors outlined above, which if unadjusted, may cause material fluctuations in Nareit FFO attributable to American Tower Corporation common stockholders growth from period to period that would not be representative of the underlying performance of the Company’s property assets in those periods. In addition, it is a widely used performance measure across the telecommunications real estate sector.

Adjusted Funds From Operations (AFFO) attributable to American Tower Corporation common stockholders: Consolidated AFFO, excluding the impact of noncontrolling interests on both Nareit FFO attributable to American Tower Corporation common stockholders and the other line items included in the calculation of Consolidated AFFO. The Company believes that providing this additional metric enhances transparency, given the minority interests in its Indian and European businesses.

Consolidated AFFO per Share: Consolidated AFFO divided by the diluted weighted average common shares outstanding.

AFFO attributable to American Tower Corporation common stockholders per Share: AFFO attributable to American Tower Corporation common stockholders divided by the diluted weighted average common shares outstanding.

Free Cash Flow: Cash provided by operating activities less total cash capital expenditures, including payments on finance leases and perpetual land easements. The Company believes that Free Cash Flow is useful to investors as the basis for comparing our performance and coverage ratios with other companies in its industry, although this measure of Free Cash Flow may not be directly comparable to similar measures used by other companies.

Net Debt: Total long-term debt, including current portion and finance lease liabilities, less cash and cash equivalents.

Net Leverage Ratio: Net Debt divided by the quarter’s annualized Adjusted EBITDA (the quarter’s Adjusted EBITDA multiplied by four). The Company believes that including this calculation is important for investors and analysts given it is a critical component underlying its credit agency ratings.

Cautionary Language Regarding Forward-Looking Statements

This press release contains “forward-looking statements” concerning our goals, beliefs, expectations, strategies, objectives, plans, future operating results and underlying assumptions and other statements that are not necessarily based on historical facts. Examples of these statements include, but are not limited to, statements regarding our full year 2021 outlook and other targets, foreign currency exchange rates, our expectations for the closing of signed acquisitions, including the Pending Telxius Acquisition, our expectations for the redemption of shares in ATC TIPL, our expectations regarding the potential impacts of the Adjusted Gross Revenue court ruling in India and factors that could affect such expectations, our expectations regarding the impacts of COVID-19 and actions in response to the pandemic on our business and our operating results and factors that could affect such expectations and our expectations regarding the leasing demand for communications real estate. Actual results may differ materially from those indicated in our forward-looking statements as a result of various important factors, including: (1) a significant decrease in leasing demand for our communications infrastructure would materially and adversely affect our business and operating results, and we cannot control that demand; (2) if our tenants consolidate their operations, exit the telecommunications business or share site infrastructure to a significant degree, our growth, revenue and ability to generate positive cash flows could be materially and adversely affected; (3) a substantial portion of our revenue is derived from a small number of tenants, and we are sensitive to adverse changes in the creditworthiness and financial strength of our tenants; (4) increasing competition within our industry may materially and adversely affect our revenue; (5) our expansion initiatives involve a number of risks and uncertainties, including those related to integrating acquired or leased assets, that could adversely affect our operating results, disrupt our operations or expose us to additional risk; (6) new technologies or changes in our or a tenant’s business model could make our tower leasing business less desirable and result in decreasing revenues and operating results; (7) competition for assets could adversely affect our ability to achieve our return on investment criteria; (8) our leverage and debt service obligations may materially and adversely affect our ability to raise additional financing to fund capital expenditures, future growth and expansion initiatives and to satisfy our distribution requirements; (9) restrictive covenants in the agreements related to our securitization transactions, our credit facilities and our debt securities could materially and adversely affect our business by limiting flexibility, and we may be prohibited from paying dividends on our common stock, which may jeopardize our qualification for taxation as a REIT; (10) we may be adversely affected by changes in LIBOR reporting practices, the method in which LIBOR is determined or the use of alternative reference rates; (11) our business, and that of our tenants, is subject to laws, regulations and administrative and judicial decisions, and changes thereto, that could restrict our ability to operate our business as we currently do or impact our competitive landscape; (12) our foreign operations are subject to economic, political and other risks that could materially and adversely affect our revenues or financial position, including risks associated with fluctuations in foreign currency exchange rates; (13) if we fail to remain qualified for taxation as a REIT, we will be subject to tax at corporate income tax rates, which may substantially reduce funds otherwise available, and even if we qualify for taxation as a REIT, we may face tax liabilities that impact earnings and available cash flow; (14) complying with REIT requirements may limit our flexibility or cause us to forego otherwise attractive opportunities; (15) we could have liability under environmental and occupational safety and health laws; (16) our towers, fiber networks, data centers or computer systems may be affected by natural disasters, security breaches and other unforeseen events for which our insurance may not provide adequate coverage; (17) our costs could increase and our revenues could decrease due to perceived health risks from radio emissions, especially if these perceived risks are substantiated; (18) if we are unable to protect our rights to the land under our towers, it could adversely affect our business and operating results; and (19) if we are unable or choose not to exercise our rights to purchase towers that are subject to lease and sublease agreements at the end of the applicable period, our cash flows derived from those towers will be eliminated. For additional information regarding factors that may cause actual results to differ materially from those indicated in our forward-looking statements, we refer you to the information contained in Item 1A of our Form 10-K for the year ended December 31, 2020 under the caption “Risk Factors.” We undertake no obligation to update the information contained in this press release to reflect subsequently occurring events or circumstances.

UNAUDITED CONSOLIDATED BALANCE SHEETS

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UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS

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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

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UNAUDITED CONSOLIDATED RESULTS FROM OPERATIONS, BY SEGMENT

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As a result of the acquisition of InSite Wireless Group, LLC, the Company updated its reportable segments to rename U.S. property and Asia property to U.S. & Canada property and Asia-Pacific property, respectively. The Company continues to report its results in six segments – U.S. & Canada property, Asia-Pacific property, Africa property, Europe property, Latin America property and services. The change in reportable segment names had no impact on the Company’s consolidated financial statements for any prior periods.

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UNAUDITED CONSOLIDATED RESULTS FROM OPERATIONS, BY SEGMENT (CONTINUED)

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UNAUDITED SELECTED CONSOLIDATED FINANCIAL INFORMATION

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