CIK 0001053507 · Large accelerated filer
AMERICAN TOWER CORP /MA/
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- AMT
- Exchange
- NYSE
- Industry
- Real Estate Investment Trusts
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- EIN
- 650723837
- Phone
- 6173757500
- Business address
- 222 BERKELEY STREET, BOSTON, MA, 02116
- Former names
- AMERICAN TOWER SYSTEMS CORP
- Open-market buys, last 90 days
- $508,597
- in 2 filings
- Open-market sales, last 90 days
- $403,084
- in 2 filings, $291K under 10b5-1 plans
Net +$105,513. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
Reading 100 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-10-29 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Sale 10b5-1 | −952 | $185.81 | $177K | 26,133 |
| 2026-10-28 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Sale 10b5-1 | −626 | $182.00 | $114K | 27,085 |
| 2026-07-29 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Sale 10b5-1 | −1,106 | $174.96 | $194K | 27,711 |
| 2026-07-28 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Sale 10b5-1 | −685 | $169.54 | $116K | 28,817 |
| 2026-04-29 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Sale 10b5-1 | −416 | $177.54 | $74K | 29,461 |
| 2026-04-28 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Sale 10b5-1 | −556 | $178.48 | $99K | 29,877 |
| 2026-03-11 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Shares withheld for taxes | −863 | $182.85 | $158K | 30,433 |
| 2026-03-10 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Grant or award | +6,878 | 37,925 | ||
| 2026-03-10 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Shares withheld for taxes | −6,629 | $186.12 | $1.2M | 31,296 |
| 2026-03-04 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Sale 10b5-1 | −682 | $188.51 | $129K | 31,047 |
| 2026-02-27 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Sale 10b5-1 | −656 | $186.16 | $122K | 31,729 |
| 2026-02-25 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Grant or award | +11,083 | 32,385 | ||
| 2025-10-01 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Shares withheld for taxes | −55 | $193.32 | $11K | 21,262 |
| 2025-03-11 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Shares withheld for taxes | −905 | $209.78 | $190K | 21,282 |
| 2025-03-10 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Grant or award | +6,008 | 23,598 | ||
| 2025-03-10 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Shares withheld for taxes | −1,411 | $213.07 | $301K | 22,187 |
| 2024-10-01 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Shares withheld for taxes | −59 | $232.07 | $14K | 17,553 |
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