AMT

American Tower Corp /ma/

Insider trading activity for American Tower Corp /ma/, straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

-$703.4K

net selling

Bought(1 · 1 insiders): $500.7K
Sold(3 · 2 insiders): $1.2M

Past 6 months

-$876.4K

net selling

Bought(1 · 1 insiders): $500.7K
Sold(5 · 2 insiders): $1.4M

Past 12 months

-$21.2M

net selling

Bought(3 · 2 insiders): $2M
Sold(19 · 5 insiders): $23.2M

Transaction history

The 70 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Aug 21	Kalathur Rajesh	Director	PBUY	2,829	$177.00	$500.7K	+57.3%	Open the original filing on SEC.gov
Jul 29	Dowling Ruth T	EVP, Chief Admin Ofr,…	SSELL◷	1,106	$174.96	$193.5K	-3.8%	Open the original filing on SEC.gov
Jul 29	Meyer Robert Joseph	SVP & Advisor to the CFO	SSELL	5,000	$178.89	$894.5K	-18.9%	Open the original filing on SEC.gov
Jul 28	Dowling Ruth T	EVP, Chief Admin Ofr,…	SSELL◷	685	$169.54	$116.1K	-2.3%	Open the original filing on SEC.gov
Jun 1	Meyer Robert Joseph	SVP & Advisor to the CFO	FTAX	153	$187.53	$28.7K	-0.6%	Open the original filing on SEC.gov
May 28	Reeve Pamela D A	Director	GGIFT	810	—	—	-3.7%	Open the original filing on SEC.gov
Apr 29	Dowling Ruth T	EVP, Chief Admin Ofr,…	SSELL◷	416	$177.54	$73.9K	-1.4%	Open the original filing on SEC.gov
Apr 28	Dowling Ruth T	EVP, Chief Admin Ofr,…	SSELL◷	556	$178.48	$99.2K	-1.8%	Open the original filing on SEC.gov
Mar 11	Rossi Richard C	EVP & President, U.S.…	FTAX	684	$182.85	$125.1K	-3.8%	Open the original filing on SEC.gov
Mar 11	Font Juan	SVP, Pres. & CEO,…	FTAX	928	$182.85	$169.7K	-3.2%	Open the original filing on SEC.gov
Mar 11	Smith Rodney M	EVP, CFO & Treasurer	FTAX	1,295	$182.85	$236.8K	-1.4%	Open the original filing on SEC.gov
Mar 11	Meyer Robert Joseph	SVP & Chief Accounting…	FTAX	684	$182.85	$125.1K	-2.5%	Open the original filing on SEC.gov
Mar 11	Dowling Ruth T	EVP, Chief Admin Ofr,…	FTAX	863	$182.85	$157.8K	-2.8%	Open the original filing on SEC.gov
Mar 11	Noel Eugene M	EVP & Chief Operating…	FTAX	719	$182.85	$131.5K	-2.0%	Open the original filing on SEC.gov
Mar 11	Vondran Steven O	President and CEO	FTAX	2,158	$182.85	$394.6K	-1.9%	Open the original filing on SEC.gov
Mar 10	Rossi Richard C	EVP & President, U.S.…	FTAX	1,544	$186.12	$287.4K	-7.8%	Open the original filing on SEC.gov
Mar 10	Rossi Richard C	EVP & President, U.S.…	AGRANT	6,448	—	—	+48.5%	Open the original filing on SEC.gov
Mar 10	Font Juan	SVP, Pres. & CEO,…	FTAX	1,834	$186.12	$341.3K	-5.9%	Open the original filing on SEC.gov
Mar 10	Font Juan	SVP, Pres. & CEO,…	AGRANT	8,060	—	—	+35.0%	Open the original filing on SEC.gov
Mar 10	Smith Rodney M	EVP, CFO & Treasurer	FTAX	12,433	$186.12	$2.3M	-11.7%	Open the original filing on SEC.gov
Mar 10	Smith Rodney M	EVP, CFO & Treasurer	AGRANT	10,531	—	—	+11.0%	Open the original filing on SEC.gov
Mar 10	Meyer Robert Joseph	SVP & Chief Accounting…	FTAX	1,368	$186.12	$254.6K	-4.8%	Open the original filing on SEC.gov
Mar 10	Meyer Robert Joseph	SVP & Chief Accounting…	AGRANT	4,030	—	—	+16.5%	Open the original filing on SEC.gov
Mar 10	Dowling Ruth T	EVP, Chief Admin Ofr,…	FTAX	6,629	$186.12	$1.2M	-17.5%	Open the original filing on SEC.gov
Mar 10	Dowling Ruth T	EVP, Chief Admin Ofr,…	AGRANT	6,878	—	—	+22.1%	Open the original filing on SEC.gov
Mar 10	Noel Eugene M	EVP & Chief Operating…	FTAX	2,498	$186.12	$464.9K	-6.6%	Open the original filing on SEC.gov
Mar 10	Noel Eugene M	EVP & Chief Operating…	AGRANT	8,167	—	—	+27.6%	Open the original filing on SEC.gov
Mar 10	Vondran Steven O	President and CEO	FTAX	15,269	$186.12	$2.8M	-12.1%	Open the original filing on SEC.gov
Mar 10	Vondran Steven O	President and CEO	AGRANT	20,955	—	—	+19.9%	Open the original filing on SEC.gov
Mar 10	Chambliss Kelly C	Director	AGRANT	1,209	—	—	+37.6%	Open the original filing on SEC.gov
Mar 10	MacNab Craig	Director	AGRANT	1,209	—	—	+8.6%	Open the original filing on SEC.gov
Mar 10	Kalathur Rajesh	Director	PBUY★	2,671	$185.30	$494.9K	+117.9%	Open the original filing on SEC.gov
Mar 10	Kalathur Rajesh	Director	AGRANT	1,209	—	—	+114.5%	Open the original filing on SEC.gov
Mar 10	Hormats Robert D	Director	AGRANT	1,209	—	—	+14.4%	Open the original filing on SEC.gov
Mar 10	Clarke Teresa Hillary	Director	AGRANT	1,209	—	—	+29.5%	Open the original filing on SEC.gov
Mar 10	Reeve Pamela D A	Director	AGRANT	1,209	—	—	+5.8%	Open the original filing on SEC.gov
Mar 10	Ray Neville R	Director	AGRANT	1,209	—	—	+114.5%	Open the original filing on SEC.gov
Mar 10	Reilly Eugene F	Director	AGRANT	1,209	—	—	+21.3%	Open the original filing on SEC.gov
Mar 10	Tanner Bruce L	Director	AGRANT	1,209	—	—	+21.1%	Open the original filing on SEC.gov
Mar 10	Lieblein Grace	Director	AGRANT	1,209	—	—	+15.2%	Open the original filing on SEC.gov
Mar 10	Frank Kenneth R	Director	AGRANT	1,209	—	—	+24.3%	Open the original filing on SEC.gov
Mar 4	Vondran Steven O	President and CEO	MEXER◷◆	33,482	—	—	—	Open the original filing on SEC.gov
Mar 4	Vondran Steven O	President and CEO	SSELL◷	1,773	$189.82	$336.6K	-1.7%	Open the original filing on SEC.gov
Mar 4	Vondran Steven O	President and CEO	SSELL◷	16,625	$188.82	$3.1M	-13.4%	Open the original filing on SEC.gov
Mar 4	Vondran Steven O	President and CEO	SSELL◷	15,084	$187.90	$2.8M	-10.9%	Open the original filing on SEC.gov
Mar 4	Vondran Steven O	President and CEO	MEXER◷	33,482	$94.71	$3.2M	+31.8%	Open the original filing on SEC.gov
Mar 4	Dowling Ruth T	EVP, Chief Admin Ofr,…	SSELL◷	682	$188.51	$128.6K	-2.1%	Open the original filing on SEC.gov
Mar 2	Noel Eugene M	EVP & Chief Operating…	MEXER◷◆	41,209	—	—	—	Open the original filing on SEC.gov
Mar 2	Noel Eugene M	EVP & Chief Operating…	SSELL◷	6,985	$192.03	$1.3M	-19.1%	Open the original filing on SEC.gov
Mar 2	Noel Eugene M	EVP & Chief Operating…	SSELL◷	21,604	$191.40	$4.1M	-37.1%	Open the original filing on SEC.gov
Mar 2	Noel Eugene M	EVP & Chief Operating…	SSELL◷	7,378	$190.29	$1.4M	-11.3%	Open the original filing on SEC.gov
Mar 2	Noel Eugene M	EVP & Chief Operating…	SSELL◷	5,242	$189.36	$992.6K	-7.4%	Open the original filing on SEC.gov
Mar 2	Noel Eugene M	EVP & Chief Operating…	MEXER◷	41,209	$94.71	$3.9M	+139.3%	Open the original filing on SEC.gov
Feb 27	Dowling Ruth T	EVP, Chief Admin Ofr,…	SSELL◷	656	$186.16	$122.1K	-2.0%	Open the original filing on SEC.gov
Feb 27	Meyer Robert Joseph	SVP & Chief Accounting…	SSELL	4,454	$186.73	$831.7K	-15.4%	Open the original filing on SEC.gov
Feb 25	Dowling Ruth T	EVP, Chief Admin Ofr,…	AGRANT	11,083	—	—	+52.0%	Open the original filing on SEC.gov
Feb 25	Smith Rodney M	EVP, CFO & Treasurer	AGRANT	21,425	—	—	+28.8%	Open the original filing on SEC.gov
Feb 25	Vondran Steven O	President and CEO	AGRANT	24,626	—	—	+30.5%	Open the original filing on SEC.gov
Feb 17	Smith Rodney M	EVP, CFO & Treasurer	MEXER◷◆	34,341	—	—	—	Open the original filing on SEC.gov
Feb 17	Smith Rodney M	EVP, CFO & Treasurer	SSELL◷	1	$193.13	$193	0.0%	Open the original filing on SEC.gov
Feb 17	Smith Rodney M	EVP, CFO & Treasurer	SSELL◷	22,658	$192.49	$4.4M	-23.4%	Open the original filing on SEC.gov
Feb 17	Smith Rodney M	EVP, CFO & Treasurer	SSELL◷	9,596	$191.52	$1.8M	-9.0%	Open the original filing on SEC.gov
Feb 17	Smith Rodney M	EVP, CFO & Treasurer	SSELL◷	2,086	$190.35	$397.1K	-1.9%	Open the original filing on SEC.gov
Feb 17	Smith Rodney M	EVP, CFO & Treasurer	MEXER◷	34,341	$94.71	$3.3M	+46.2%	Open the original filing on SEC.gov
Jan 3	Font Juan	SVP, Pres. & CEO,…	FTAX	419	$174.80	$73.2K	-1.8%	Open the original filing on SEC.gov
Oct 31, 2025	Reilly Eugene F	Director	PBUY	5,554	$178.99	$994.1K	+4,114%	Open the original filing on SEC.gov
Oct 1, 2025	Dowling Ruth T	EVP, Chief Admin Ofr,…	FTAX	55	$193.32	$10.6K	-0.3%	Open the original filing on SEC.gov
Sep 19, 2025	Reilly Eugene F	Director	EEXPS◆	1	—	—	—	Open the original filing on SEC.gov
Jul 31, 2025	Font Juan	SVP, Pres. & CEO,…	SSELL	720	$208.33	$150K	-3.0%	Open the original filing on SEC.gov
Jun 1, 2025	Meyer Robert Joseph JR	SVP & Chief Accounting…	FTAX	162	$214.65	$34.8K	-0.6%	Open the original filing on SEC.gov

PBUY$500.7K

Kalathur Rajesh · DirectorAug 21

2,829 sh @ $177.00 · +57.3% own

SSELL◷$193.5K

Dowling Ruth T · EVP, Chief Admin…Jul 29

1,106 sh @ $174.96 · -3.8% own

SSELL$894.5K

Meyer Robert Joseph · SVP & Advisor to…Jul 29

5,000 sh @ $178.89 · -18.9% own

SSELL◷$116.1K

Dowling Ruth T · EVP, Chief Admin…Jul 28

685 sh @ $169.54 · -2.3% own

FTAX$28.7K

Meyer Robert Joseph · SVP & Advisor to…Jun 1

153 sh @ $187.53 · -0.6% own

GGIFT—

Reeve Pamela D A · DirectorMay 28

810 sh · -3.7% own

SSELL◷$73.9K

Dowling Ruth T · EVP, Chief Admin…Apr 29

416 sh @ $177.54 · -1.4% own

SSELL◷$99.2K

Dowling Ruth T · EVP, Chief Admin…Apr 28

556 sh @ $178.48 · -1.8% own

FTAX$125.1K

Rossi Richard C · EVP & President,…Mar 11

684 sh @ $182.85 · -3.8% own

FTAX$169.7K

Font Juan · SVP, Pres. & CEO,…Mar 11

928 sh @ $182.85 · -3.2% own

FTAX$236.8K

Smith Rodney M · EVP, CFO & Treasur…Mar 11

1,295 sh @ $182.85 · -1.4% own

FTAX$125.1K

Meyer Robert Joseph · SVP & Chief…Mar 11

684 sh @ $182.85 · -2.5% own

FTAX$157.8K

Dowling Ruth T · EVP, Chief Admin…Mar 11

863 sh @ $182.85 · -2.8% own

FTAX$131.5K

Noel Eugene M · EVP & Chief…Mar 11

719 sh @ $182.85 · -2.0% own

FTAX$394.6K

Vondran Steven O · President and CEOMar 11

2,158 sh @ $182.85 · -1.9% own

FTAX$287.4K

Rossi Richard C · EVP & President,…Mar 10

1,544 sh @ $186.12 · -7.8% own

AGRANT—

Rossi Richard C · EVP & President,…Mar 10

6,448 sh · +48.5% own

FTAX$341.3K

Font Juan · SVP, Pres. & CEO,…Mar 10

1,834 sh @ $186.12 · -5.9% own

AGRANT—

Font Juan · SVP, Pres. & CEO,…Mar 10

8,060 sh · +35.0% own

FTAX$2.3M

Smith Rodney M · EVP, CFO & Treasur…Mar 10

12,433 sh @ $186.12 · -11.7% own

AGRANT—

Smith Rodney M · EVP, CFO & Treasur…Mar 10

10,531 sh · +11.0% own

FTAX$254.6K

Meyer Robert Joseph · SVP & Chief…Mar 10

1,368 sh @ $186.12 · -4.8% own

AGRANT—

Meyer Robert Joseph · SVP & Chief…Mar 10

4,030 sh · +16.5% own

FTAX$1.2M

Dowling Ruth T · EVP, Chief Admin…Mar 10

6,629 sh @ $186.12 · -17.5% own

AGRANT—

Dowling Ruth T · EVP, Chief Admin…Mar 10

6,878 sh · +22.1% own

FTAX$464.9K

Noel Eugene M · EVP & Chief…Mar 10

2,498 sh @ $186.12 · -6.6% own

AGRANT—

Noel Eugene M · EVP & Chief…Mar 10

8,167 sh · +27.6% own

FTAX$2.8M

Vondran Steven O · President and CEOMar 10

15,269 sh @ $186.12 · -12.1% own

AGRANT—

Vondran Steven O · President and CEOMar 10

20,955 sh · +19.9% own

AGRANT—

Chambliss Kelly C · DirectorMar 10

1,209 sh · +37.6% own

AGRANT—

MacNab Craig · DirectorMar 10

1,209 sh · +8.6% own

PBUY★$494.9K

Kalathur Rajesh · DirectorMar 10

2,671 sh @ $185.30 · +117.9% own

AGRANT—

Kalathur Rajesh · DirectorMar 10

1,209 sh · +114.5% own

AGRANT—

Hormats Robert D · DirectorMar 10

1,209 sh · +14.4% own

AGRANT—

Clarke Teresa Hillary · DirectorMar 10

1,209 sh · +29.5% own

AGRANT—

Reeve Pamela D A · DirectorMar 10

1,209 sh · +5.8% own

AGRANT—

Ray Neville R · DirectorMar 10

1,209 sh · +114.5% own

AGRANT—

Reilly Eugene F · DirectorMar 10

1,209 sh · +21.3% own

AGRANT—

Tanner Bruce L · DirectorMar 10

1,209 sh · +21.1% own

AGRANT—

Lieblein Grace · DirectorMar 10

1,209 sh · +15.2% own

AGRANT—

Frank Kenneth R · DirectorMar 10

1,209 sh · +24.3% own

MEXER◷◆—

Vondran Steven O · President and CEOMar 4

33,482 sh

SSELL◷$336.6K

Vondran Steven O · President and CEOMar 4

1,773 sh @ $189.82 · -1.7% own

SSELL◷$3.1M

Vondran Steven O · President and CEOMar 4

16,625 sh @ $188.82 · -13.4% own

SSELL◷$2.8M

Vondran Steven O · President and CEOMar 4

15,084 sh @ $187.90 · -10.9% own

MEXER◷$3.2M

Vondran Steven O · President and CEOMar 4

33,482 sh @ $94.71 · +31.8% own

SSELL◷$128.6K

Dowling Ruth T · EVP, Chief Admin…Mar 4

682 sh @ $188.51 · -2.1% own

MEXER◷◆—

Noel Eugene M · EVP & Chief…Mar 2

41,209 sh

SSELL◷$1.3M

Noel Eugene M · EVP & Chief…Mar 2

6,985 sh @ $192.03 · -19.1% own

SSELL◷$4.1M

Noel Eugene M · EVP & Chief…Mar 2

21,604 sh @ $191.40 · -37.1% own

SSELL◷$1.4M

Noel Eugene M · EVP & Chief…Mar 2

7,378 sh @ $190.29 · -11.3% own

SSELL◷$992.6K

Noel Eugene M · EVP & Chief…Mar 2

5,242 sh @ $189.36 · -7.4% own

MEXER◷$3.9M

Noel Eugene M · EVP & Chief…Mar 2

41,209 sh @ $94.71 · +139.3% own

SSELL◷$122.1K

Dowling Ruth T · EVP, Chief Admin…Feb 27

656 sh @ $186.16 · -2.0% own

SSELL$831.7K

Meyer Robert Joseph · SVP & Chief…Feb 27

4,454 sh @ $186.73 · -15.4% own

AGRANT—

Dowling Ruth T · EVP, Chief Admin…Feb 25

11,083 sh · +52.0% own

AGRANT—

Smith Rodney M · EVP, CFO & Treasur…Feb 25

21,425 sh · +28.8% own

AGRANT—

Vondran Steven O · President and CEOFeb 25

24,626 sh · +30.5% own

MEXER◷◆—

Smith Rodney M · EVP, CFO & Treasur…Feb 17

34,341 sh

SSELL◷$193

Smith Rodney M · EVP, CFO & Treasur…Feb 17

1 sh @ $193.13 · 0.0% own

SSELL◷$4.4M

Smith Rodney M · EVP, CFO & Treasur…Feb 17

22,658 sh @ $192.49 · -23.4% own

SSELL◷$1.8M

Smith Rodney M · EVP, CFO & Treasur…Feb 17

9,596 sh @ $191.52 · -9.0% own

SSELL◷$397.1K

Smith Rodney M · EVP, CFO & Treasur…Feb 17

2,086 sh @ $190.35 · -1.9% own

MEXER◷$3.3M

Smith Rodney M · EVP, CFO & Treasur…Feb 17

34,341 sh @ $94.71 · +46.2% own

FTAX$73.2K

Font Juan · SVP, Pres. & CEO,…Jan 3

419 sh @ $174.80 · -1.8% own

PBUY$994.1K

Reilly Eugene F · DirectorOct 31, 2025

5,554 sh @ $178.99 · +4,114% own

FTAX$10.6K

Dowling Ruth T · EVP, Chief Admin…Oct 1, 2025

55 sh @ $193.32 · -0.3% own

EEXPS◆—

Reilly Eugene F · DirectorSep 19, 2025

1 sh

SSELL$150K

Font Juan · SVP, Pres. & CEO,…Jul 31, 2025

720 sh @ $208.33 · -3.0% own

FTAX$34.8K

Meyer Robert Joseph JR · SVP & Chief…Jun 1, 2025

162 sh @ $214.65 · -0.6% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

All 39 filings we hold were filed within the two-business-day deadline.

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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