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 |
|---|---|---|---|---|---|---|
| 2026-02-27 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Sale 10b5-1 | −656 | $186.16 | $122K | 31,729 |
| 2026-02-27 | Meyer Robert Joseph SVP & Chief Accounting Officer | Sale | −4,454 | $186.73 | $832K | 24,461 |
| 2026-02-25 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Grant or award | +11,083 | 32,385 | ||
| 2026-02-25 | Smith Rodney M EVP, CFO & Treasurer | Grant or award | +21,425 | 95,739 | ||
| 2026-02-25 | Vondran Steven O President and CEO | Grant or award | +24,626 | 105,374 | ||
| 2026-02-17 | Smith Rodney M EVP, CFO & Treasurer | Option exercise 10b5-1 | +34,341 | $94.71 | $3.3M | 108,655 |
| 2026-02-17 | Smith Rodney M EVP, CFO & Treasurer | Sale 10b5-1 | −2,086 | $190.35 | $397K | 106,569 |
| 2026-02-17 | Smith Rodney M EVP, CFO & Treasurer | Sale 10b5-1 | −9,596 | $191.52 | $1.8M | 96,973 |
| 2026-02-17 | Smith Rodney M EVP, CFO & Treasurer | Sale 10b5-1 | −22,658 | $192.49 | $4.4M | 74,315 |
| 2026-02-17 | Smith Rodney M EVP, CFO & Treasurer | Sale 10b5-1 | −1 | $193.13 | $193 | 74,314 |
| 2026-02-17 | Smith Rodney M EVP, CFO & Treasurer | Option exercise · Option to Purchase Common Stock 10b5-1 | −34,341 | 0 | ||
| 2026-02-02 | Clarke Teresa Hillary Director | Purchase | +30.71 | $178.04 | $5K | 5,512.36 |
| 2026-01-03 | Font Juan SVP, Pres. & CEO, CoreSite | Shares withheld for taxes | −419 | $174.80 | $73K | 23,054 |
| 2025-10-31 | REILLY EUGENE F Director | Purchase | +5,554 | $178.99 | $994K | 5,689 |
| 2025-10-20 | Clarke Teresa Hillary Director | Purchase | +28.66 | $189.12 | $5K | 5,481.65 |
| 2025-10-01 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Shares withheld for taxes | −55 | $193.32 | $11K | 21,262 |
| 2025-09-19 | REILLY EUGENE F Director | Other disposition · Call Option (Obligation to Sell) | −1 | 0 | ||
| 2025-07-31 | Font Juan SVP, Pres. & CEO, CoreSite | Sale | −720 | $208.33 | $150K | 23,425 |
| 2025-07-11 | Clarke Teresa Hillary Director | Purchase | +24.1 | $223.23 | $5K | 5,452.99 |
| 2025-06-01 | Meyer Robert Joseph JR SVP & Chief Accounting Officer | Shares withheld for taxes | −162 | $214.65 | $35K | 28,794 |
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