American Tower Corporation (REIT)

Last updated September 27, 2026

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Organization details

Legal name: American Tower Corporation (REIT)
Former names: American Tower Systems Corp
Ownership: Public
Status: Active
SIC code: 6798 — Real Estate Investment Trusts
Jurisdiction of incorporation: Delaware
Headquarters city: Boston
Headquarters state / province: Massachusetts
Headquarters country: United States
Fiscal year end: December
Ticker symbol: AMT
Primary stock exchange: NYSE

Identifiers

SEC CIK: 0001053507
EIN: 65-0723837

Board of directors

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Bruce L. Tanner · Director
Since 2023
Craig Macnab · Director
Since 2023
David E. Sharbutt · Director
Since 2023
Eugene F. Reilly · Director
Since 2025
Grace Lieblein · Director
Since 2023
Joann A. Reed · Director
Since 2023
Kelly C. Chambliss · Director
Since 2023
Kenneth R. Frank · Director
Since 2023
Kristen M. Ludgate · Director
Since 2026
Neville R. Ray · Director
Since 2024
Pamela D. A. Reeve · Director
Since 2023
Rajesh Kalathur · Director
Since 2025
Raymond P. Dolan · Director
Since 2023
Robert D. Hormats · Director
Since 2023
Samme L. Thompson · Director
Since 2023
Steven O. Vondran · Director · President and CEO
Since 2024
Teresa Hillary Clarke · Director
Since 2023
Thomas A. Bartlett · Director · President and CEO Overboarded
Since 2023

Chief executives

Steven O. Vondran · President and CEO

Dates unknown

Thomas A. Bartlett · President and CEO

Dates unknown

Director election results

Annual meeting of May 20, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

Board connections

10 of this board's directors also sit on 15 other boards.

Shared director Other board Same sector

Ameren Corporation
via Steven O. Vondran
Arthur J. Gallagher & Co.
via Teresa Hillary Clarke
Associated Banc-Corp
via Kristen M. Ludgate
BitMine Immersion Technologies Inc.
via David E. Sharbutt
Blackstone Digital Infrastructure Trust Inc.
via Thomas A. Bartlett
BorgWarner Inc.
via Rajesh Kalathur
ExlService Holdings Inc.
via Thomas A. Bartlett
FutureCrest Acquisition Corp.
via David E. Sharbutt
Honeywell International Inc.
via Grace Lieblein
Independence Realty Trust Inc.
via Craig Macnab
Otis Worldwide Corporation
via Thomas A. Bartlett
The Hartford Insurance Group Inc.
via Thomas A. Bartlett
Truist Financial Corporation
via Bruce L. Tanner
VICI Properties Inc.
via Craig Macnab
Ziff Davis Inc.
via Neville R. Ray

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Bought, last 12 months: $1,989,780; 3 purchases by 2 insiders
Sold, last 12 months: $23,238,977; 19 sales by 5 insiders

Date	Insider	Transaction	Shares	Price	Value
Aug 21, 2026	Rajesh Kalathur Director	Open-market purchase	+2,829	$177.00	$500,733
Jul 29, 2026	Meyer Robert Joseph Officer (SVP & Advisor to the CFO)	Open-market sale	−5,000	$178.89	$894,450
Jul 29, 2026	Dowling Ruth T Officer (EVP, Chief Admin Ofr, GC & Sec)	Open-market sale	−1,106	$174.96	$193,506
Jul 28, 2026	Dowling Ruth T Officer (EVP, Chief Admin Ofr, GC & Sec)	Open-market sale	−685	$169.54	$116,135
Jun 1, 2026	Meyer Robert Joseph Officer (SVP & Advisor to the CFO)	Shares withheld for tax	−153	$187.53	$28,692
May 28, 2026	Pamela D. A. Reeve Director	Gift	−810	—	—
Apr 29, 2026	Dowling Ruth T Officer (EVP, Chief Admin Ofr, GC & Sec)	Open-market sale	−416	$177.54	$73,857
Apr 28, 2026	Dowling Ruth T Officer (EVP, Chief Admin Ofr, GC & Sec)	Open-market sale	−556	$178.48	$99,235
Mar 11, 2026	Rossi Richard C Officer (EVP & President, U.S. Tower)	Shares withheld for tax	−684	$182.85	$125,069
Mar 11, 2026	Font Juan Officer (SVP, Pres. & CEO, CoreSite)	Shares withheld for tax	−928	$182.85	$169,685
Mar 11, 2026	Smith Rodney M Officer (EVP, CFO & Treasurer)	Shares withheld for tax	−1,295	$182.85	$236,791
Mar 11, 2026	Meyer Robert Joseph Officer (SVP & Chief Accounting Officer)	Shares withheld for tax	−684	$182.85	$125,069
Mar 11, 2026	Dowling Ruth T Officer (EVP, Chief Admin Ofr, GC & Sec)	Shares withheld for tax	−863	$182.85	$157,800
Mar 11, 2026	Noel Eugene M Officer (EVP & Chief Operating Officer)	Shares withheld for tax	−719	$182.85	$131,469
Mar 11, 2026	Steven O. Vondran Director, Officer (President and CEO)	Shares withheld for tax	−2,158	$182.85	$394,590

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