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AMTAmerican Tower

Real estate · REIT · NYSE

We are one of the largest global real estate investment trusts and a leading independent owner, operator and developer of multitenant communications real estate. 10-K, Item 1

Headquarters
Boston, MA
Next results
around Feb 23, 2027
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10-K 0001053507-26-000035 (2026-02-24) vs 10-K 0001053507-25-000025 (2025-02-25)

SectionCompared textWords nowChanged
Risk FactorsItem 1A10,869 25.0%
MD&AItem 715,896 27.2%
Legal ProceedingsItem 3, via Note 17 – COMMITMENTS AND CONTINGENCIES956 15.2%
Accounting Policies10-K text, Note 1 – BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES7,094 17.5%

The redline: what was cut and what was added

In each section, the paragraph that changed most, marked against last year's 10-K: cut words struck through, new words highlighted and underlined.

Accounting Policies 260 words changed in this paragraph; it is 34% similar to last year's version.
Depreciation expense is recorded using the straight-line method over the assets’ estimated useful lives. The Company finalized its review of the estimated useful lives of its tower assets during the first quarter of 2024. The Company now has over 20 years of operating history, and determined that it should modify its current estimates for asset lives based on its historical operating experience. The Company retained an independent consultant to assist the Company in completing this review and analysis. The Company previously depreciated its towers on a straight-line basis over the shorter of the term of the underlying ground lease (including renewal options) taking into account residual value or the estimated useful life of the tower, which the Company had historically estimated to be 20 years. The Company determined that the estimated useful life of its tower assets is 30 thirty years, before taking into account residual value. Additionally, certain of the Company’s intangible assets are amortized on a similar basis to its tower assets, as the estimated useful lives of such intangible assets correlate to the useful life of the towers. The Company accounted for the changes in the useful lives as a change in accounting estimate under ASC 250 Accounting Changes and Error Corrections, which were recorded prospectively beginning on January 1, 2024. On January 1, 2024, the Company began depreciating its towers and related intangible assets on a straight-line basis over the remaining estimated useful life of the tower, taking into account the extended useful life and residual value. The extension of the asset lives (i) resulted in an approximately $ 515 million increase in the right of use asset, as additional renewal options may be included, with an offsetting adjustment made to increase the related operating lease liability and (ii) resulted in an estimated $ 730 million ($ 649 million after tax, or an increase of $ 1.39 per diluted share) decrease in depreciation and amortization expense for the year ended December 31, 2024.

Source: 10-K text, Note 1 – BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, 10-K 0001053507-26-000035 vs 10-K text, Note 1 – BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, 10-K 0001053507-25-000025

Risk Factors 242 words changed in this paragraph; it is 46% similar to last year's version.
In addition, as of January 1, 2024, we and our subsidiaries, in principle, became subject to the Organization for Economic Cooperation and Development (the “OECD”) Global Anti-Base Erosion Rules (the “Pillar 2 Rules”) as promulgated by jurisdictions. The Pillar 2 Rules can potentially lead to additional taxes (“Top-Up Tax”) when the effective tax rate (as defined by the Pillar 2 Rules) in a jurisdiction is below 15%. The Pillar 2 Rules, however, do not apply to “Excluded Entities” and certain subsidiaries of Excluded Entities. We are currently analyzing our qualification believe we qualify as an Excluded Entity as a “Real Estate Investment Vehicle.” In the event we certain subsidiaries do not qualify as a Real Estate Investment Vehicle, Excluded Entities, available “Safe Harbor” rules could apply that would exempt the entities from any Top-Up Taxes Tax. For 2025, the Under-Taxed Payments Rule (UTPR) Safe Harbor excludes all US income from the Pillar 2 Rules. In addition, substantially all of our non-excluded, non-U.S. jurisdictions qualify for other Safe Harbors. The remaining jurisdictions that may apply beginning not qualify would have immaterial Top-Up Taxes. Beginning in fiscal year 2026 2026, the U.S. income of non-excluded entities may result in material Top-Up Taxes; however, on our United States income and may be material. January 5, 2026, the OECD announced a comprehensive Side-by-Side Safe harbor exceptions are expected to apply for Harbor that, if enacted, would exempt U.S.-parented multinational companies from certain Top-Up Taxes under the majority of our non-United States income, and for those entities that do Pillar 2 Rules beginning January 1, 2026. The Side-by-Side Safe Harbor is not meet certain safe harbor tests, the impact to us as a whole is expected an exemption from any qualified domestic minimum Top-Up Tax. The Side-by-Side Safe Harbor has yet to be immaterial. It is noted enacted in any jurisdiction where we operate that has already implemented the Pillar 2 Rules. Additionally, the Pillar 2 Rules are still yet to be implemented enacted in most many of the jurisdictions in which we operate. Developments will be monitored as guidance and local implementation progresses.

Source: Item 1A, 10-K 0001053507-26-000035 vs Item 1A, 10-K 0001053507-25-000025

MD&A 134 words changed in this paragraph; it is 34% similar to last year's version.
India Bangladesh Term Loan—On February 17, 2023, Loan—In March 2025, we borrowed 10.0 billion INR entered into a 400.0 million BDT (approximately $120.7 million at the date of borrowing) under an unsecured $3.3 million) term loan in India with a maturity date that is one year eight years from the date of the first draw thereunder (the “India “Bangladesh Term Loan”). In January 2024, On March 24, 2025, we amended borrowed 150.0 million BDT (approximately $1.2 million) under the India Bangladesh Term Loan. The Bangladesh Term Loan bears interest at 13.50% per annum, subject to extend the quarterly resets. Interest is payable quarterly. Any outstanding principal and accrued but unpaid interest will be due and payable in full at maturity. The Bangladesh Term Loan does not require amortization of principal and may be paid prior to maturity date to December 31, 2024. On September 12, 2024, in connection with the completion of the ATC TIPL Transaction, we repaid the India Term Loan. whole or in part at our option without penalty or premium.

Source: Item 7, 10-K 0001053507-26-000035 vs Item 7, 10-K 0001053507-25-000025

Legal Proceedings 95 words changed in this paragraph; it is 81% similar to last year's version.
AT&T Transaction - The Company has an agreement with SBC Communications Inc., a predecessor entity to AT&T Inc. (“AT&T”), that currently provides for the lease or sublease of approximately 1,600 towers, which commenced between December 2000 and August 2004. Substantially all of the towers are part of the Trust Securitization. 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 December 31, 2024, 2025, the Company has purchased an aggregate of approximately 700 800 of the subleased towers which are subject to the applicable agreement, including 80 104 towers purchased during the year ended December 31, 2024 2025 for an aggregate purchase price of $ 59.1 82.0 million. The aggregate purchase option price for the remaining towers leased and subleased is $ 1.2 billion and includes per annum accretion through the applicable expiration of the lease or sublease of a site. For all such the applicable sites, AT&T has the right to continue to lease the reserved space through June 30, 2025 at the then-current subject to a 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 each lease for up to five successive five-year terms.

Source: Item 3, via Note 17 – COMMITMENTS AND CONTINGENCIES, 10-K 0001053507-26-000035 vs Item 3, via Note 18 – COMMITMENTS AND CONTINGENCIES, 10-K 0001053507-25-000025

Every change, by type

Sentences and paragraphs of AMT's Risk Factors and MD&A, 10-K 2026-02-24 against 10-K 2025-02-25. Each links to the text at sec.gov.

Quiet changes are sentences kept from last year with one to four words changed, at least one of them a hedge, a modal or a qualifier (may, could, will, not, significant, material…). A year or date rolling forward is not counted.

The full word listadverse, adversely, all, although, anticipate, anticipates, any, approximately, believe, believes, can, cannot, certain, could, expect, expects, generally, however, if, intend, intends, largely, likely, many, material, materially, may, might, most, must, never, no, not, possible, primarily, probable, should, significant, significantly, some, substantial, substantially, unlikely, will, would

AddedRisk Factors
For example, we are currently engaged in a legal dispute (the “Arbitration”) with one of our customers in Mexico, AT&T Comunicaciones Digitales, S. de R.L. de C.V. and related entities (collectively, “AT&T Mexico”). AT&T Mexico, which represented approximately $300 million of tenant revenue in 2025, is challenging the calculation of the monthly lease amount established under our Master Lease Agreement with AT&T Mexico (the “MLA”), as well as certain other provisions of the MLA, seeking rent abatement both retroactively and prospectively, and withheld certain tower rents during 2025. As previously discussed, on September 23, 2025, we and AT&T Mexico reached an agreement pursuant to which AT&T Mexico has remitted payment of the majority of the withheld tower rents and has resumed monthly payments of the majority of its owed tower rents. The remainder of the outstanding receivables and the future monthly unpaid tower rent amounts are being deposited into an irrevocable escrow account, overseen by an independent trustee, to be released in accordance with a final ruling in the Arbitration or by mutual consent of us and AT&T Mexico. We incurred approximately $30 million of reserves during the year ended December 31, 2025 related to this customer. We expect to record future reserves until the Arbitration is settled.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedRisk Factors
Additionally, on September 24, 2025, one of our U.S. customers, DISH Wireless L.L.C., a subsidiary of DISH Network Corporation (“DISH”), delivered a notice purporting to be excused from its contractual obligations under our Strategic Collocation Agreement entered into in March 2021 (the “SCA”). DISH has failed to meet its payment obligations, and as of January 2026 is in default under the SCA. We filed a complaint seeking a declaratory judgment that DISH has not been excused from its obligations under the SCA, that the SCA remains in full force and effect, and that DISH remains required to perform all of its obligations under the SCA. This matter is still pending.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedRisk Factors
The outcomes of these matters are uncertain, and there can be no assurance that our positions will be upheld. Adverse rulings in one or both of these disputes could have a material negative impact on our results of operations and financial condition.

Read it in 10-K 2026-02-24 at sec.gov ↗

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

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedRisk Factors
business that may not provide expected returns or profitability, which could divert management attention and have a material adverse effect on our operating results.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedRisk Factors
We have a substantial amount of indebtedness. As of December 31, 2025, we had approximately $37.2 billion of consolidated debt and the ability to borrow additional aggregate amounts of approximately $9.6 billion under our $6.0 billion senior unsecured multicurrency revolving credit facility, as amended and restated in December 2021, as further amended (the “2021 Multicurrency Credit Facility”) and our $4.0 billion senior unsecured revolving credit facility, as amended and restated in December 2021, as further amended (the “2021 Credit Facility”), net of approximately $36.8 million of outstanding undrawn letters of credit.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedRisk Factors
Additionally, our Board has approved a share repurchase program allowing us to repurchase common stock through various methods, including open market purchases. The program does not require any specific amount or number of shares to be repurchased, and management will determine timing and volume based on market conditions and other factors. Repurchases could impact stock price, liquidity and cash reserves, potentially affecting future growth opportunities. While intended to enhance long-term shareholder value, there is no guarantee of success, and short-term price fluctuations could reduce the program’s effectiveness. Additionally, our share repurchase program could diminish our available cash, which may impact our ability to finance future growth and pursue possible future strategic opportunities and acquisitions.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedRisk Factors
•changes to applicable tax laws or successful challenges to how or where our profits are currently recognized, which could increase our overall taxes;

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedRisk Factors
Our data centers segment is also subject to various federal, state and local environmental and health and safety laws and regulations in the United States, as set forth in Item 1A of this Annual Report under the caption “Risk Factors— Our data center segment contains certain operational differences from our tower leasing operations resulting in different operational risks. If we do not successfully operate our data center segment or identify or manage the related operational risks, such operations may produce results that are lower than anticipated.”

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedRisk Factors
Globally, the frequency, severity and sophistication of cybersecurity incidents have increased, and these trends will likely continue, especially during times of geopolitical tension or instability among countries from which a number of recent cybersecurity events have been alleged to have originated. Such cyber-attacks could be in the form of espionage, phishing campaigns and otherwise. Additionally, the use of AI technologies has led to increased exposure to cybersecurity threats globally. AI systems may be used by threat actors to exploit vulnerabilities more efficiently or to facilitate increasingly

Read it in 10-K 2026-02-24 at sec.gov ↗

RemovedRisk Factors
One or more of our customers, or their parent companies, may experience financial difficulties, file for bankruptcy or reduce or terminate operations as a result of a prolonged economic downturn, economic difficulties (such as those from the imposition of

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedRisk Factors
In addition, as of January 1, 2024, we and our subsidiaries, in principle, would be subject to the Organization for Economic Cooperation and Development (OECD) Global Anti-Base Erosion Rules (more commonly referred to as the “Pillar 2 Rules”) as

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedRisk Factors
In 2021, we adopted science-based greenhouse gas reduction targets, which were approved by the Science Based Targets initiative and are in line with the goals set forth in the 2015 Paris Agreement. Our ability to achieve these goals are based on several factors, some of which are outside of our control including changing regulatory requirements, the pace of changes in technology and the availability of requisite financing. With changes to our portfolio, such as the divestiture of India and the CoreSite Acquisition, our ability to meet these goals may also be impacted. In addition, to meet our goals, we may need to expend significant resources, which could increase our operational costs. We cannot guarantee that we will achieve our announced environmental, social and governance goals and initiatives. In addition, consumers’ perceptions of our efforts to achieve these goals often differ widely and present risks to our reputation and brand. Failing to meet these goals could result in customer dissatisfaction and damage to our reputation with our key stakeholders, which could in turn adversely impact our results of operations, reputation, financial condition and stock price.

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedRisk Factors
previously filed tax returns and continuing assessments of our tax exposures may have an adverse effect on our provision for income taxes and cash tax liability.

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedRisk Factors
Our platform expansion growth initiatives may not be successful, or we may be required to record impairment charges for our goodwill or for other intangible assets, which could have an adverse effect on our business, results of operations or financial condition, and could limit our continued investments in such platform expansion initiatives.

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedRisk Factors
Public perception of possible health risks associated with cellular and other wireless communications technology could slow the growth of wireless companies, which could in turn slow our growth. In particular, negative public perception of, and regulations regarding, these perceived health risks, including claims that the deployment of 5G networks is linked to adverse health effects, could undermine the market acceptance of wireless communications services and increase opposition to the development and expansion of tower sites. If a scientific study, court decision, government agency ruling, or misinformation, disinformation or

Read it in 10-K 2025-02-25 at sec.gov ↗

RewordedRisk Factors
We may not be able to renew existing customer leases or enter into new customer leases, or if we are able to renew or enter into new leases, they may be at rates lower than our current rates or on less favorable terms than our current terms, resulting in an adverse impact on our results of operations and growth rate.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedRisk Factors
In addition, Although in the United States, the current administration has taken steps to reconsider many greenhouse gas initiatives (including reporting and disclosure requirements), there is an increased focus by many foreign (including the European Union), state (including California and New York) and local governments, regulators, investors, employees, customers and other stakeholders regarding environmental and energy policies relating to climate change, greenhouse gas emissions and other climate-related matters, including policies related to disclosure requirements.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedRisk Factors
These Although a reduction in greenhouse gas emissions standards and reporting obligations in the U.S. may be possible at the federal level in the short-term, foreign and state governmental initiatives are becoming more stringent and may require us and our customers to make capital expenditures, such as investing in internal compliance systems and investments in personnel, which would result in increased costs for us. us and our customers.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedRisk Factors
Because our data centers are critical to many of our customers’ businesses, service interruptions or significant equipment damage in our data centers operations, such failures could also result in lost profits or other indirect or consequential damages and diminish customer confidence, impacting our ability to our customers. retain and attract business.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedRisk Factors
Due to the The evolving nature of global tax laws and regulations and compliance approaches, it is currently not possible to assess the ultimate impact of these actions on our financial statements, but these actions approaches could have an impact on our financial results.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedRisk Factors
We have service level commitment obligations commitments to substantially all of our data center customers. customers, and interruptions, equipment damage or staffing challenges could impair our ability to meet these obligations and lead to potential claims.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedRisk Factors
Conversely, we may invest significant capital in technologies, platform expansion initiatives or new additions to our core business that may not provide expected returns or profitability, which could divert management attention and have a material adverse effect on our operating results.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedRisk Factors
The current inflationary and high Impacts on the economic environment, such as inflation or rising interest rate environment rates, could materially and adversely affect our customers through disruptions of, among other things, their ability to procure their equipment through their supply chains, their ability to procure power and fuel and their ability to maintain liquidity and deploy network capital, with potential decreases in consumer spending contributing to liquidity risks.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedRisk Factors
As we continue to acquire and build During the course of acquiring or building communications sites and other communications infrastructure assets, including data center facilities and related assets, in our existing markets and expand expansion into new markets, we are subject to a number of risks and uncertainties, including not meeting our return on investment criteria and financial objectives, increased costs, assumed liabilities and the diversion of managerial attention.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedRisk Factors
Our leverage and leverage, debt service obligations, including during a high interest rates environment, obligations and repurchase activity may materially and adversely affect our ability to raise additional financing to fund capital expenditures, future growth and expansion initiatives and may reduce funds available to satisfy our distribution requirements.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedRisk Factors
Our expansion and operational initiatives involve a number of risks and uncertainties, including those related to integrating acquired or leased assets, uncertainties that could adversely affect our operating results, disrupt our operations or expose us to additional risk.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedRisk Factors
In addition, many of our customers and potential customers rely on capital raising activities to fund their operations and capital expenditures, which may be more difficult or expensive in the event of downturns in the economy or disruptions in the financial and credit markets, such as the current environment driven by the significant challenges including those caused by factors such as inflation, currency devaluations and other foreign currency exchange rate volatility, higher interest rates and supply chain disruptions.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedMD&A
During the year ended December 31, 2025, we completed the sale of our fiber assets in South Africa (“South Africa Fiber”). Prior to the divestiture, the operating results of South Africa Fiber were included within the Africa & APAC property segment.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedMD&A
AT&T Mexico Dispute. We are currently engaged in an Arbitration with AT&T Mexico. AT&T Mexico, which represented approximately $300 million of tenant revenue in 2025, is challenging the calculation of the monthly lease amount established under the MLA, as well as certain other provisions of the MLA, seeking rent abatement both retroactively and prospectively, and had been withholding tower rents since the start of 2025. We incurred approximately $30 million of reserves during the year ended December 31, 2025 related to this customer. We expect to record future reserves until the Arbitration is settled. We believe we have meritorious defenses to the claims raised in this Arbitration, are vigorously defending the full enforceability of the MLA and remain confident in the terms and conditions of the MLA. The Arbitration is scheduled for a hearing in August 2026.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedMD&A
On September 23, 2025, we and AT&T Mexico reached an agreement pursuant to which AT&T Mexico will remit payment of the majority of the withheld tower rents and will resume monthly payments of the majority of its owed tower rents. The remainder of the outstanding receivables and the future monthly tower rent amounts not remitted directly to us will be deposited into an irrevocable escrow account, overseen by an independent trustee, to be released in accordance with a final ruling in the Arbitration or by mutual consent of us and AT&T Mexico.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedMD&A
DISH Dispute. On September 24, 2025, DISH delivered a notice purporting to be excused from its contractual obligations under the SCA. DISH has failed to meet its payment obligations, and as of January 2026 is in default under the SCA. We remain confident that DISH has not been excused from its obligations under the SCA, and that the SCA remains in full force and effect. On October 20, 2025, we filed a complaint in the U.S. District Court for the District of Colorado seeking a declaratory judgment that DISH has not been excused from its obligations under the SCA, that the SCA remains in full force and effect, and that DISH remains required to perform all of its obligations under the SCA. DISH represented approximately 2% and 4% of our total annual property revenue and total annual U.S. & Canada property revenue, respectively, for 2025.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedMD&A
Strong industry tailwinds also underpin our data center business. Our portfolio of highly interconnected data center facilities and related assets in the United States is well positioned to monetize elevated demand for hybrid-cloud and multi-cloud deployments, as well as demand from early-stage AI-related workloads like inferencing, machine learning models and GPU-as-a-Service from neo clouds. We believe it is important for AI workloads to be collocated with hybrid installations. Our data center facilities are well-suited for this, as they have a rich ecosystem of network and cloud interconnections coupled with purpose-built capacity designed to support AI and other higher-density deployments. These positive trends reinforce our expectation for our data centers to deliver long-term growth with attractive returns.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedMD&A
Selling, General, Administrative and Development Expense (“SG&A”)Year Ended December 31, Percent Change 2025 vs 2024 2025 2024 Property U.S. & Canada $ 166.6 $ 161.1 3% Africa & APAC (1) 76.1 68.0 12 Europe 69.6 64.8 7 Latin America 102.6 111.0 (8) Data Centers 88.5 78.8 12 Total property 503.4 483.7 4 Services 27.4 21.0 30 Other 409.9 428.7 (4) Total selling, general, administrative and development expense $ 940.7 $ 933.4 1%

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedMD&A
On January 4, 2024, we, through our subsidiaries, ATC Asia Pacific Pte. Ltd. and ATC Telecom Infrastructure Private Limited (“ATC TIPL”), which held our operations in India, entered into an agreement with Data Infrastructure Trust (“DIT”), an infrastructure investment trust sponsored by an affiliate of Brookfield Asset Management, pursuant to which DIT agreed to acquire a 100% ownership interest in ATC TIPL (the “ATC TIPL Transaction”). Per the terms of the agreement, total aggregate consideration represented up to approximately 210 billion Indian Rupees (“INR”) (approximately $2.5 billion), including the value of the VIL OCDs and the VIL Shares (each as defined and further discussed below), payments on certain existing customer receivables, the repayment of existing intercompany debt and the repayment, or assumption, of our existing term loan in India, by DIT.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedMD&A
During the year ended December 31, 2024, ATC TIPL distributed approximately 29.6 billion INR (approximately $354.1 million) to us, which included the value of the VIL Shares and the VIL OCDs and the satisfaction of the economic benefit associated with the rights to payments on certain existing customer receivables. The distributions were deducted from the total aggregate consideration received by us at closing.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedMD&A
The increase in net income was primarily due to losses from discontinued operations, net of tax, as a result of the ATC TIPL Transaction in the prior year.

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedMD&A
•Repayment of $525.0 million aggregate principal amount outstanding under our Secured Tower Revenue Notes, Series 2015-2, Class A (the “Series 2015-2 Notes”);

Read it in 10-K 2026-02-24 at sec.gov ↗

AddedMD&A
•Amendment of the 2021 Multicurrency Credit Facility, the 2021 Credit Facility and the 2021 Term Loan (as defined below) to, among other things, (i) extend the maturity dates and (ii) update the Applicable Margins (as defined in the loan agreements).

Read it in 10-K 2026-02-24 at sec.gov ↗

RemovedMD&A
During the year ended December 31, 2024, we also completed the sales of ATC Australia and ATC New Zealand. The divestitures did not qualify for presentation as discontinued operations.

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedMD&A
We expect that our churn rate in our U.S. & Canada property segment will remain elevated through 2025 due to contractual lease cancellations and non-renewals by T-Mobile, including legacy Sprint Corporation leases, pursuant to the terms of the T-Mobile MLA entered into in September 2020.

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedMD&A
•In less advanced wireless markets where network deployments are in earlier stages, 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 over the long term.

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedMD&A
In emerging markets, such as Bangladesh, Burkina Faso, Ghana, Kenya, Niger, Nigeria, the Philippines 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 certain underdeveloped areas. A majority of consumers in these markets still utilize basic wireless services and advanced device penetration remains low. In more developed urban locations within these markets, mobile data usage tends to be higher and advanced network deployments are further along. Carriers are focused on completing voice network build-outs while increasing investments in data networks as mobile data usage and smartphone penetration within their customer bases begin to accelerate.

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedMD&A
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 increasingly focused on

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedMD&A
the early stages of 5G network deployments. Consumers in these regions are increasingly adopting smartphones and other advanced devices, in particular as lower cost smartphones become increasingly available. 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 advancing rapidly, which typically requires that carriers continue to invest in their networks to maintain and augment their quality of service.

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedMD&A
Finally, in markets with more mature network technology, such as Canada, Germany, France and Spain, carriers are focused on deploying 5G data networks to account for rapidly increasing wireless data usage among their customer base.

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedMD&A
◦a decrease of $1.4 million generated from newly acquired or constructed sites, which includes the impact of the disposition in the second quarter of 2022 of certain operations acquired in connection with our acquisition of InSite Wireless Group, LLC;

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedMD&A
During the first quarter of 2024, we finalized our reviews of the estimated useful lives of our tower assets and estimated settlement dates for our asset retirement obligations. Based on information obtained, we determined that our estimated asset lives and our estimated settlement dates should be extended, which resulted in an estimated $730 million decrease in depreciation and amortization expense and an estimated $75 million decrease in accretion expense for the year ended December 31, 2024. For more information on the change in the estimated useful lives of our tower assets and the change in the estimated settlement dates for our asset retirement obligations, see the information under the captions “Property and Equipment” and “Asset Retirement Obligations” included in note 1 to our consolidated financial statements included in this Annual Report (“Note 1”).

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedMD&A
The decrease in the income tax provision for the year ended December 31, 2023 was primarily attributable to a benefit in 2023 from the application of a tax law change in Kenya. The income tax provision for the year ended December 31, 2023 included the reversal of valuation allowances of $87.2 million in certain foreign jurisdictions as compared to the reversal of valuation allowances of $76.5 million for the year ended December 31, 2022.

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedMD&A
During the year ended December 31, 2023, we deferred recognition of revenue of approximately $27.3 million, net of recoveries, related to VIL in India. During the year ended December 31, 2024, we recognized approximately $95.7 million of this previously deferred revenue. As of December 31, 2024, we have fully recognized this previously deferred revenue.

Read it in 10-K 2025-02-25 at sec.gov ↗

RemovedMD&A
During the year ended December 31, 2024, we recognized a gain of $46.4 million on the sale of the VIL Shares and the VIL OCDs. The gains on the sales of the VIL Shares and the VIL OCDs are recorded in Loss from discontinued operations, net of taxes in the consolidated statements of operations in the current period. During the year ended December 31, 2023, we recognized an unrealized gain of $76.7 million related to the VIL OCDs. Gains related to the VIL Shares and the VIL OCDs are included in Other income, net in the table above.

Read it in 10-K 2025-02-25 at sec.gov ↗

RewordedMD&A
Year Ended December 31, Percent Change 2025 vs 2024 vs 2023 Percent Change 2023 vs 2022 2025 2024 2023 2022 Net income (1) $ 2,628.5 $ 2,280.2 $ 1,367.1 $ 1,696.7 67% (19)% 15 % Real estate related depreciation, amortization and accretion 1,899.6 1,879.6 2,682.7 2,925.5 (30) (8) 1 Losses from sale or disposal of real estate and real estate related impairment charges (2) 83.5 91.6 414.6 184.0 (78) 125 (9) Adjustments and distributions for unconsolidated affiliates and noncontrolling interests (3) (450.7) (352.7) (324.0) (210.4) 9 54 28 Adjustments for discontinued operations (4) — 1,334.5 469.6 683.7 184 (31) (100) Nareit FFO attributable to American Tower Corporation common stockholders $ 4,160.9 $ 5,233.2 $ 4,610.0 $ 5,279.5 14% (13)% (20) % Straight-line revenue (101.0) (277.6) (465.4) (508.5) (40) (8) (64) Straight-line expense 36.2 46.8 24.4 34.0 92 (28) (23) Stock-based compensation expense 174.2 192.7 183.3 161.7 5 13 (10) Deferred portion of income tax and other income tax adjustments (5) 150.0 88.7 (162.6) (195.4) (155) (17) GTP one-time cash tax settlement (6) — — 48.3 — (100) 69 Non-real estate related depreciation, amortization and accretion 142.0 149.2 245.8 239.4 (39) 3 (5) Amortization of deferred financing costs, capitalized interest, debt discounts and premiums and long-term deferred interest charges 54.1 49.8 47.5 9 5 54.1 0 Other expense (income) expense (7) (6) 576.2 (377.6) 326.3 (434.7) (216) (175) Loss on retirement of long-term obligations — 0.3 0.4 (100) (25) (253) Other operating (income) expenses (8) income (7) (15.1) (17.5) 36.1 86.6 (148) (58) (14) Capital improvement capital expenditures (185.2) (157.4) (186.6) (164.8) (16) 13 18 Corporate capital expenditures (10.4) (13.9) (16.2) (9.4) (14) 72 (25) Adjustments and distributions for unconsolidated affiliates and noncontrolling interests (9) (8) 59.7 4.4 19.4 20.0 (77) (3) 1,257 Adjustments for discontinued operations (10) (9) — 9.0 (53.1) (87.9) (117) (40) (100) AFFO attributable to American Tower Corporation common stockholders $ 5,041.6 $ 4,934.1 $ 4,611.5 $ 4,516.7 7% 2% 2 % AFFO attributable to American Tower Corporation common stockholders from continuing operations $ 5,041.6 $ 4,568.9 $ 4,266.4 $ 4,197.4 7% 2% 10 % AFFO attributable to American Tower Corporation common stockholders from discontinued operations $ — $ 365.2 $ 345.1 $ 319.3 6% 8% (100) %

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedMD&A
The increase in AFFO attributable to American Tower Corporation common stockholders was primarily attributable to (i) an increase in our operating profit, excluding the impact of straight-line accounting, and (ii) an increase decreases in cash paid for interest and cash paid for income taxes, partially offset by (x) a decrease in AFFO attributable to American Tower Corporation common stockholders from discontinued operations, partially offset by (x) operations as a result of the sale of ATC TIPL in the third quarter of 2024, (y) an increase in net cash paid for interest, (y) capital improvement capital expenditures and (z) an increase in distributions and adjustments for noncontrolling interests, including distributions to noncontrolling interest holders in our Data Centers segment and (z) increases in cash paid for income taxes and capital improvement capital expenditures. segment.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedMD&A
The increase decrease in other operating expenses expense for the year ended December 31, 2023 2025 was primarily attributable to a loss the gain on the sale of Mexico South Africa Fiber of $80.0 $53.6 million, partially offset by an increase in impairment charges, excluding goodwill impairments, charges of $52.7 million and an increase in severance and related costs of $21.8 million, partially offset by a decrease in integration and acquisition related costs, including pre-acquisition contingencies and settlements, of $67.2 $32.1 million.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedMD&A
The decrease in net income from continuing operations was primarily due to (i) changes in other expense (income) income (expense), primarily due to foreign currency exchange rate fluctuations, fluctuations and (ii) an increase in net interest expense, (iii) an increase in other operating expenses and (iv) an increase in goodwill impairment expense, the income tax provision, partially offset by (x) (y) an increase in segment operating profit, (y) a decrease in depreciation, amortization and accretion expense profit and (z) a decrease in the income tax provision. interest expense.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedMD&A
Restrictions Under Agreements Relating to the 2015 Securitization and the Trust Securitizations—The Securitization—The indenture and related supplemental indenture governing the American Tower Secured Revenue Notes, Series 2015-2, Class A (the “Series 2015-2 Notes”) issued by GTP Acquisition Partners I, LLC (“GTP Acquisition Partners”) in a private securitization transaction in May 2015 (the “2015 Securitization”) and the loan agreement related to the securitization transactions completed in March 2018 (the “2018 Securitization”) and March 2023 (the “2023 Securitization” and, together with the 2018 Securitization, the “Trust Securitizations”) (collectively, the Securitization”) (the “Securitization Loan Agreements”) include certain financial ratios and operating covenants and other restrictions customary for transactions subject to rated securitizations.

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedMD&A
We have distributed an aggregate of approximately $20.5 billion The dividends paid to our common stockholders, including the dividend paid stockholders in February 2025, 2025 were primarily classified as ordinary income that may be treated as qualified REIT dividends under Section 199A of the Code for taxable years beginning before 2026. and we currently expect the 2026 dividends to be similarly classified.

Read it in 10-K 2026-02-24 at sec.gov ↗

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

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedMD&A
Year Ended December 31, 2025 2024 2023 Proceeds from issuance of senior notes, net $ 3,000.6 $ 3,568.6 $ 5,678.3 Repayments of Borrowings under (repayments of) credit facilities, net 362.2 (2,321.1) (2,563.8) Repayments of term loans (1) — (1,015.4) (1,500.0) Proceeds from issuance of securities in securitization transaction — 1,300.0 Repayments of securitized debt (525.0) — (1,300.0) Repayments of senior notes (3,206.2) (2,150.0) (1,700.0) Purchases of common stock (364.6) — Distributions paid on common stock (3,157.2) (3,074.9) (2,949.3)

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedMD&A
Issuer or Borrower Notes/Securities Issued Conditions Limiting Distributions of Excess Cash Excess Cash Distributed During Year Ended December 31, 2024 2025 DSCR as of 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) December 31, 2024 2025 Cash Trap DSCR Amortization Period (in millions) (in millions) (in millions) 2015 Trust Securitization GTP Acquisition Partners American Tower Secured Revenue Notes, Series 2015-2 1.30x, Tested Quarterly (2) (3)(4) $354.0 18.10x $309.1 $311.9 Trust Securitizations AMT Asset Subs Secured Tower Revenue Securities, Series 2023-1, Subclass A, Secured Tower Revenue Securities, Series 2023-1, Subclass R, Secured Tower Revenue Securities, Series 2018-1, Subclass A and Secured Tower Revenue Securities, Series 2018-1, Subclass R 1.30x, Tested Quarterly (2) (3)(5) $540.1 7.14x $526.4 $540.0 (3)(4) $563.2 6.38x $457.2 $470.7

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedMD&A
For a discussion of our 2023 Liquidity and Capital Resources, 2024 Results of Operations, including a discussion of cash flows our financial results for the fiscal year ended December 31, 2023 2024 compared to the fiscal year ended December 31, 2022, 2023, refer to Part I, Item 7 of our annual report on Form 10-K filed with the 2023 SEC on February 25, 2025 (the “2024 Form 10-K. 10-K”).

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedMD&A
Argentina 498 497 — 11 Brazil 21,171 1,440 124 20,829 1,434 126 Chile 3,712 3,681 — 110 107 Colombia 4,945 4,858 — 6 Costa Rica 712 — 2 Mexico 9,423 186 89 8,689 185 75 Paraguay 1,451 1,450 — — Peru 3,976 3,968 450 1 Latin America total 45,888 2,076 343 44,684 2,069 328 Total 131,597 17,227 862

Read it in 10-K 2026-02-24 at sec.gov ↗

RewordedMD&A
Segment revenue growth included an increase of $98.6 $44.8 million, attributable to the impact of foreign currency translation, which included, among others, positive impacts of $69.3 $27.6 million related to fluctuations in MXN, $25.4 Ghanaian Cedi, $9.3 million related to fluctuations in BRL and $4.0 Ugandan Shilling, $6.8 million related to fluctuations in CLP, Kenyan Shilling and $4.4 million related to fluctuations in West African CFA Franc, partially offset by negative impacts of $1.9 $7.0 million related to fluctuations in COP. Nigerian Naira.

Read it in 10-K 2026-02-24 at sec.gov ↗

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