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 |
|---|---|---|---|---|---|---|
| 2026-03-10 | HORMATS ROBERT D Director | Grant or award | +1,209 | 9,597 | ||
| 2026-03-10 | Clarke Teresa Hillary Director | Grant or award | +1,209 | 5,307 | ||
| 2026-03-10 | REEVE PAMELA D A Director | Grant or award | +1,209 | 21,899 | ||
| 2026-03-10 | Ray Neville R Director | Grant or award | +1,209 | 2,265 | ||
| 2026-03-10 | REILLY EUGENE F Director | Grant or award | +1,209 | 6,898 | ||
| 2026-03-10 | Tanner Bruce L Director | Grant or award | +1,209 | 6,940 | ||
| 2026-03-10 | Lieblein Grace Director | Grant or award | +1,209 | 9,141 | ||
| 2026-03-10 | Frank Kenneth R Director | Grant or award | +1,209 | 6,188 | ||
| 2026-03-04 | Vondran Steven O President and CEO | Option exercise 10b5-1 | +33,482 | $94.71 | $3.2M | 138,856 |
| 2026-03-04 | Vondran Steven O President and CEO | Sale 10b5-1 | −15,084 | $187.90 | $2.8M | 123,772 |
| 2026-03-04 | Vondran Steven O President and CEO | Sale 10b5-1 | −16,625 | $188.82 | $3.1M | 107,147 |
| 2026-03-04 | Vondran Steven O President and CEO | Sale 10b5-1 | −1,773 | $189.82 | $337K | 105,374 |
| 2026-03-04 | Vondran Steven O President and CEO | Option exercise · Option to Purchase Common Stock 10b5-1 | −33,482 | 0 | ||
| 2026-03-04 | Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec | Sale 10b5-1 | −682 | $188.51 | $129K | 31,047 |
| 2026-03-02 | Noel Eugene M EVP & Chief Operating Officer | Option exercise 10b5-1 | +41,209 | $94.71 | $3.9M | 70,801 |
| 2026-03-02 | Noel Eugene M EVP & Chief Operating Officer | Sale 10b5-1 | −5,242 | $189.36 | $993K | 65,559 |
| 2026-03-02 | Noel Eugene M EVP & Chief Operating Officer | Sale 10b5-1 | −7,378 | $190.29 | $1.4M | 58,181 |
| 2026-03-02 | Noel Eugene M EVP & Chief Operating Officer | Sale 10b5-1 | −21,604 | $191.40 | $4.1M | 36,577 |
| 2026-03-02 | Noel Eugene M EVP & Chief Operating Officer | Sale 10b5-1 | −6,985 | $192.03 | $1.3M | 29,592 |
| 2026-03-02 | Noel Eugene M EVP & Chief Operating Officer | Option exercise · Option to Purchase Common Stock 10b5-1 | −41,209 | 0 |
Page 3 of 9 · 178 trades