American Tower

(e) On February 28, 2024, the Compensation Committee (the “Compensation Committee”) of the Board of Directors of American Tower Corporation (the “Company”) considered the compensation arrangements with the Company’s executive officers. The information in the table below sets forth the determinations of the Compensation Committee with respect to base salaries and cash bonus incentive targets for the year ending December 31, 2024 for the Company’s chief executive officer, chief financial officer and the three other most highly compensated executive officers who were serving as executive officers on December 31, 2023 (collectively, the “Current Named Executive Officers”). Name and Title 2024 Base Salary 2024 Target Cash Bonus Potential (% of Base Salary / $) Steven O. Vondran, President and Chief Executive Officer (1) $ 1,000,000 200% / $2,000,000 Rodney M.

(c) On October 26, 2023, American Tower Corporation (the “Company”) announced that the Company’s Board of Directors (the “Board”) appointed Steven O. Vondran as President and Chief Executive Officer of the Company, effective February 1, 2024. The Compensation Committee (the “Committee”) of the Board considered the compensation arrangements with Mr. Vondran in light of such promotion. Accordingly, on February 5, 2024, the Committee approved a new base salary and cash bonus incentive target for the year ending December 31, 2024 for Mr. Vondran, effective as of February 1, 2024. The information in the table below sets forth the determinations of the Committee: Name and Title 2024 Base Salary 2024 Target Cash Bonus Potential (% of Base Salary / $) Steven O.

(b) (e) On March 28, 2023, Edmund DiSanto communicated his intention to retire from his role as American Tower Corporation’s Executive Vice President, Special Advisor and Counsel to the Chief Executive Officer, effective July 1, 2023. Effective April 1, 2023, Mr. DiSanto will take a step-down in compensation, receiving 20% of his current salary. Mr. DiSanto will be eligible to earn a bonus for 2023, pro-rated for his length of service in 2023, with a target cash bonus potential of 125% of his salary earned during 2023.

(b) On March 8, 2023, David E. Sharbutt notified the Corporate Secretary of American Tower Corporation (the “Company”) of his decision to not stand for re-election at the Company’s 2023 Annual Meeting of Stockholders (the “Annual Meeting”). Mr. Sharbutt’s decision to not stand for re-election did not involve any disagreements with the Company. Mr. Sharbutt is currently a member of the Nominating and Corporate Governance Committee of the Board of Directors (the “Board”) of the Company and will continue his service on such committee until the Annual Meeting.

(e) On February 24, 2023, the Compensation Committee (the “Compensation Committee”) of the Board of Directors of American Tower Corporation (the “Company”) considered the compensation arrangements with the Company’s executive officers. The information in the table below sets forth the determinations of the Compensation Committee with respect to base salaries and cash bonus incentive targets for the year ending December 31, 2023 for the Company’s chief executive officer, chief financial officer and the three other most highly compensated executive officers who were serving as executive officers on December 31, 2022 (collectively, the “Current Named Executive Officers”). Name and Title 2023 Base Salary 2023 Target Cash Bonus Potential (% of Base Salary / $) Thomas A. Bartlett, President and Chief Executive Officer $ 1,100,000 200% / $2,200,000 Rodney M.

(b) On October 2, 2022, Edmund DiSanto communicated his intention to retire from his role as American Tower Corporation’s (the “Company”) Executive Vice President, Chief Administrative Officer, General Counsel and Secretary, effective January 1, 2023. The Company’s Board of Directors has appointed Ruth Dowling as the Company’s Executive Vice President, Chief Administrative Officer, General Counsel and Secretary, effective January 1, 2023. To assist in the transition of responsibilities, Mr. DiSanto will assume the new role of Executive Vice President, Special Advisor and Counsel to the Chief Executive Officer, effective January 1, 2023.

(d) Director Election . On May 18, 2022, the Board of Directors (the “Board”) of American Tower Corporation (the “Company”) appointed Kelly C. Chambliss to the Compensation Committee of the Board. The Board had previously elected Ms. Chambliss as a director on March 10, 2022.

(d) Director Election. On March 10, 2022, the Board of Directors (the “Board”) of American Tower Corporation (the “Company”) elected Kelly C. Chambliss as a director, effective immediately. The Board has not determined committee appointments for Ms. Chambliss at this time. In accordance with the Company’s Amended and Restated By-Laws, Ms. Chambliss will serve as a director until the next Annual Meeting of Stockholders or until her successor is duly elected and qualified. Ms. Chambliss is the Senior Vice President and Chief Operating Officer at IBM Consulting. Prior to this role, she was Senior Vice President of IBM Consulting, Americas and Strategic Sales.

(b) On February 28, 2022, Gustavo Lara Cantu notified the Corporate Secretary of American Tower Corporation (the “Company”) of his decision to not stand for re-election at the Company’s 2022 Annual Meeting of Stockholders (the “Annual Meeting”). Mr. Lara’s decision to not stand for re-election did not involve any disagreements with the Company. Mr. Lara is currently a member of the Compensation Committee of the Board of Directors of the Company (the “Compensation Committee”) and will continue his service on such committee until the Annual Meeting. (e) On February 24, 2022, the Compensation Committee considered the compensation arrangements with the Company’s executive officers.

(d) Director Election. On December 15, 2021, the Board of Directors (the “Board”) of American Tower Corporation (the “Company”) elected Teresa H. Clarke as a director and member of its Audit Committee, effective immediately. In accordance with the Company’s Amended and Restated By-Laws, Ms. Clarke will serve as a director until the next Annual Meeting of Stockholders or until her successor is duly elected and qualified. Ms. Clarke is the Chair of Africa.com LLC, a media holding company with an extensive array of platforms that reach a global audience interested in African content and community. Prior to joining Africa.com LLC, Ms. Clarke was a Managing Director in the investment banking division of Goldman Sachs & Co. from 2004 to 2010, where she led corporate finance and merger & acquisition transactions for corporate clients in the industrials and real estate sectors. Ms.

(e) On February 25, 2021, the Compensation Committee (the “Compensation Committee”) of the Board of Directors of American Tower Corporation (the “Company”) considered the compensation arrangements with the Company’s executive officers. The information in the table below sets forth the determinations of the Compensation Committee with respect to base salaries and cash bonus incentive targets for the year ending December 31, 2021 for the Company’s chief executive officer, chief financial officer and the four other most highly compensated executive officers who were serving as executive officers on December 31, 2020 (collectively, the “Current Named Executive Officers”). Name and Title 2021 Base Salary 2021 Target Cash Bonus Potential (% of Base Salary / $) Thomas A. Bartlett, President and Chief Executive Officer $ 1,000,000 200% / $2,000,000 Rodney M.

(d) Director Election. On January 15, 2021, the Board of Directors (the “Board”) of American Tower Corporation (the “Company”) elected Kenneth R. Frank as a director and member of its Audit Committee, effective immediately. In accordance with the Company’s Amended and Restated By-Laws, Mr. Frank will serve as a director until the next Annual Meeting of Stockholders or until his successor is duly elected and qualified. Mr. Frank is the Chief Executive Officer of Turning Technologies. Prior to joining Turning Technologies, Mr. Frank was the CEO of Kibo Software from January 2016 to December 2018 and President and Chief Operating Officer of Aptean Software from October 2011 to December 2015. Prior to his role at Aptean, Mr. Frank held a number of executive positions at Alcatel-Lucent.

(b) On November 2, 2020, Amit Sharma communicated his intention to resign from his role as American Tower Corporation’s (the “Company”) Executive Vice President and President of the Asia region, effective February 28, 2021 and, thereafter, serve as Special Advisor to the Company’s Asia region, and retire on July 1, 2021. The Company will initiate a search process, including internal and external candidates, to identify Mr. Sharma's successor.

(c) On March 16, 2020, American Tower Corporation (the “Company”) filed a Form 8-K (the “Report”) announcing that the Company’s Board of Directors (the “Board”) appointed Thomas A. Bartlett as President and Chief Executive Officer of the Company and Rodney M. Smith as Executive Vice President, Chief Financial Officer and Treasurer of the Company, each effective March 16, 2020. This Form 8-K/A amends the Report to include additional disclosure regarding Messrs. Bartlett’s and Smith’s compensation. The Compensation Committee (the “Committee”) of the Board considered the compensation arrangements with Messrs. Bartlett and Smith in light of the promotions. Accordingly, on April 11, 2020, the Committee approved new base salaries and cash bonus incentive targets for the year ending December 31, 2020 for Messrs. Bartlett and Smith, effective as of April 1, 2020.

On March 16, 2020, American Tower Corporation (the “Company”) announced that James D. Taiclet has communicated his intention to transition from his roles as the Company’s President and Chief Executive Officer. The Board of Directors of the Company (the “Board”) has appointed Thomas A. Bartlett as President and Chief Executive Officer of the Company, effective March 16, 2020. Mr. Bartlett, 61, served as Executive Vice President and Chief Financial Officer of the Company from 2009 until March 2020. He served as Treasurer from February 2012 until December 2013 and again from July 2017 until August 2018. Mr. Taiclet will continue as executive Chairman of the Board until the Company’s 2020 annual meeting of stockholders (the “AGM”) and will, during his transition, advise the Chief Executive Officer through and until June 14, 2020. Following the AGM, Pamela D. A.

(e) On February 25, 2020, the Compensation Committee (the “Compensation Committee”) of the Board of Directors of American Tower Corporation (the “Company”) considered the compensation arrangements with the Company’s executive officers. The information in the table below sets forth the determinations of the Compensation Committee with respect to base salaries and cash bonus incentive targets for the year ending December 31, 2020 for the Company’s chief executive officer, chief financial officer and the three other most highly compensated executive officers who were serving as executive officers on December 31, 2019 (collectively, the “Current Named Executive Officers”). Name and Title 2020 Base Salary 2020 Target Cash Bonus Potential (% of Base Salary / $) James D. Taiclet, Chairman of the Board, President and Chief Executive Officer $ 1,100,000 150% / $1,650,000 Thomas A.

(d) Director Election. On December 11, 2019, the Board of Directors (the “Board”) of American Tower Corporation (the “Company”) appointed Bruce L. Tanner to the Audit Committee of the Board. The Board had previously elected Mr. Tanner as a director on September 13, 2019.

(d) Director Election. On September 13, 2019, the Board of Directors (the “Board”) of American Tower Corporation (the “Company”) elected Bruce L. Tanner as a director, effective immediately. The Board has not determined committee appointments for Mr. Tanner at this time. In accordance with the Company’s Amended and Restated By-Laws, Mr. Tanner will serve as a director until the next Annual Meeting of Stockholders or until his successor is duly elected and qualified. Mr. Tanner served as Executive Vice President and Chief Financial Officer of Lockheed Martin Corporation (“Lockheed Martin”) from September 2007 until February 2019. Mr. Tanner joined Lockheed Martin in 1982 and, prior to being appointed Chief Financial Officer, held a variety of finance leadership positions at Lockheed Martin. Mr. Tanner is also a director of SunTrust Banks, Inc. For his service on the Board, Mr.

(b) Effective June 30, 2019, William H. Hess intends to step down from his position as Executive Vice President and Chairman of Latin America and EMEA of American Tower Corporation (the “Company”). Mr. Hess assumed this role effective October 1, 2018 to assist in the transition of his responsibilities upon his resignation from his prior role with the Company.

(e) On February 27, 2019, the Compensation Committee (the “Compensation Committee”) of the Board of Directors of American Tower Corporation (the “Company”) considered the compensation arrangements with the Company’s executive officers. The information in the table below sets forth the determinations of the Compensation Committee with respect to base salaries and cash bonus incentive targets for the year ending December 31, 2019 for the Company’s chief executive officer, chief financial officer and the three other most highly compensated executive officers who were serving as executive officers on December 31, 2018 (collectively, the “Current Named Executive Officers”). Name 2019 Base Salary 2019 Target Cash Bonus Potential (% of Base Salary / $) James D. Taiclet, Jr., Chairman of the Board, President and Chief Executive Officer $ 1,100,000 150% / $1,650,000 Thomas A.

(b) Effective October 1, 2018, William H. Hess intends to step down from his position as Executive Vice President, International Operations and President, Latin America and EMEA of American Tower Corporation (the “Company”) and transition to the new role of Executive Vice President and Chairman of Latin America and EMEA to assist in the transition of responsibilities. The Company’s Board of Directors has appointed Olivier Puech, Senior Vice President and CEO, Latin America, to the role of Executive Vice President and President, Latin America and EMEA, effective October 1, 2018.

(b) Effective August 1, 2018, Steven C. Marshall intends to step down from his position as Executive Vice President and President, U.S. Tower Division of American Tower Corporation (the “Company”) and transition to the new role of Executive Vice President, Senior Advisor to the Company's Chief Executive Officer. Mr. Marshall will hold this position through October 31, 2018 to assist in the transition of responsibilities. The Company’s Board of Directors has appointed Steven O. Vondran, Senior Vice President and General Counsel, U.S. Tower Division, to the role of Executive Vice President and President, U.S. Tower Division, effective August 1, 2018.

(e) On February 27, 2018, the Compensation Committee (the “Compensation Committee”) of the Board of Directors of American Tower Corporation (the “Company”) considered the compensation arrangements with the Company’s executive officers. The information in the table below sets forth the determinations of the Compensation Committee with respect to base salaries and cash bonus incentive targets for the year ending December 31, 2018 for the Company’s chief executive officer, chief financial officer and the three other most highly compensated executive officers who were serving as executive officers on December 31, 2017 (collectively, the “Current Named Executive Officers”). Name 2018 Base Salary 2018 Target Cash Bonus Potential (% of Base Salary / $) James D. Taiclet, Jr., Chairman of the Board, President and Chief Executive Officer $ 1,100,000 130% / $1,430,000 Thomas A.

(d) Director Election. On June 13, 2017, the Board of Directors (the “Board”) of American Tower Corporation (the “Company”) elected Grace D. Lieblein as a director and member of its Audit Committee, effective immediately. In accordance with the Company’s Amended and Restated By-Laws, Ms. Lieblein will serve as a director until the next Annual Meeting of Stockholders or until her successor is duly elected and qualified. Ms. Lieblein most recently served as Vice President, Global Quality of General Motors Company (“GM”), a multinational corporation that designs, manufactures, markets and distributes vehicles, from November 2014 to December 2015. Ms. Lieblein joined GM in 1978 and has held a variety of leadership positions at GM in engineering, supply chain management and international operations. Ms.

(b) Departing Director. On March 8, 2017, Carolyn F. Katz notified the Corporate Secretary and the Board of Directors (the “Board”) of American Tower Corporation (the “Company”) of her decision to not stand for re-election at the Company’s 2017 Annual Meeting of Stockholders (the “Annual Meeting”). Ms. Katz’s decision to not stand for re-election did not involve any disagreements with the Company. Ms. Katz is currently a member of the Audit Committee and will continue her service on such committee until the Annual Meeting.

(e) On February 27, 2017, the Compensation Committee (the “Compensation Committee”) of the Board of Directors of American Tower Corporation (the “Company”) considered the compensation arrangements with the Company’s executive officers. The information in the table below sets forth the determinations of the Compensation Committee with respect to base salaries and cash bonus incentive targets for the year ending December 31, 2017 for the Company’s chief executive officer, chief financial officer and the three other most highly compensated executive officers who were serving as executive officers on December 31, 2016 (collectively, the “Current Named Executive Officers”). Name 2017 Base Salary 2017 Target Cash Bonus Potential (% of Base Salary / $) James D. Taiclet, Jr., Chairman of the Board, President and Chief Executive Officer $ 1,100,000 130% / $1,430,000 Thomas A.

(e) On February 26, 2016, the Compensation Committee (the “Compensation Committee”) of the Board of Directors of American Tower Corporation (the “Company”) considered the compensation arrangements with the Company’s executive officers. The information in the table below sets forth the determinations of the Compensation Committee with respect to base salaries and cash bonus incentive targets for the year ending December 31, 2016 for the Company’s chief executive officer, chief financial officer and the three other most highly compensated executive officers who were serving as executive officers on December 31, 2015 (collectively, the “Current Named Executive Officers”). Name 2016 Base Salary 2016 Target Cash Bonus Potential (% of Base Salary / $) James D. Taiclet, Jr., Chairman of the Board, President and Chief Executive Officer $ 1,100,000 130% / $1,430,000 Thomas A.