AMT
AMERICAN TOWER CORP · Real Estate · Market cap $86.6B
Insiders sold $640K net in the last 90 days ·2 sellers, 2 buyers· 2 of 3 sales under Rule 10b5-1 plans· latest Form 4 filed Oct 22, 2026
Insider Buying
$2.1M
reported purchases (SEC code P)
Insider Selling
$23.2M
reported sales (SEC code S)
Unique Insiders
8
in the rolling window
Latest filing
Oct 22, 2026
Clarke Teresa Hillary
AMERICAN TOWER CORP (AMT) has 37 SEC Form 4 filings (79 transaction rows) in the rolling window, disclosed by 8 distinct insiders. Most recent filing: Oct 22, 2026.
Inside the rolling window, 8 insiders at AMERICAN TOWER CORP reported 18 open-market purchases totaling $2.1M and 11 open-market sales totaling $23.2M. The most active filer is Director Clarke Teresa Hillary with 15 filings. Insiders have net sold $813K over the trailing 6 months. The most recent open-market filing is a purchase of 6.674 shares by Director Clarke Teresa Hillary, dated Apr 28, 2023, worth $1K.
- Industry:REIT - Specialty
- CEO:Steven O. Vondran
- Employees:4,866
- HQ:Boston, MA, US
- IPO:1998-02-27
| Source | |||||||
|---|---|---|---|---|---|---|---|
Clarke Teresa HillaryFirst filing | Director | Purchase | 6.674 | $1K | Oct 22 | +2.4% | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 7.192 | $1K | Oct 22 | +2.4% | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 8.452 | $1K | Oct 22 | +2.4% | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 7.68 | $2K | Oct 22 | +2.4% | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 18.588 | $3K | Oct 22 | +2.4% | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 15.873 | $3K | Oct 22 | +2.4% | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 14.371 | $3K | Oct 22 | +2.4% | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 17.577 | $3K | Oct 22 | +2.4% | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 25.488 | $5K | Oct 22 | +2.4% | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 24.095 | $5K | Oct 22 | +2.4% | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 28.657 | $5K | Oct 22 | — | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 30.713 | $5K | Oct 22 | — | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 43.5 | $8K | Oct 22 | — | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 46.448 | $8K | Oct 22 | — | SEC ↗ |
Clarke Teresa HillaryFirst filing | Director | Purchase | 42.926 | $8K | Oct 22 | — | SEC ↗ |
| Director | Purchase | 2,829 | $501K | Aug 25 | — | SEC ↗ | |
Meyer Robert JosephFirst in 5 months | SVP & Advisor to the CFO | Sale | 5,000 | $894K | Jul 31 | — | SEC ↗ |
Dowling Ruth TFirst in 3 months | EVP, Chief Admin Ofr, GC & Sec | Sale | 685 | $116K | Jul 30 | — | SEC ↗ |
Dowling Ruth TFirst in 3 months | EVP, Chief Admin Ofr, GC & Sec | Sale | 1,106 | $194K | Jul 30 | — | SEC ↗ |
| EVP, Chief Admin Ofr, GC & Sec | Sale | 556 | $99K | Apr 30 | — | SEC ↗ | |
| EVP, Chief Admin Ofr, GC & Sec | Sale | 416 | $74K | Apr 30 | — | SEC ↗ | |
Kalathur RajeshFirst filing | Director | Purchase | 2,671 | $495K | Mar 12 | — | SEC ↗ |
Vondran Steven OFirst filing | President and CEO | Sale | 33,482 | $6.3M | Mar 6 | — | SEC ↗ |
| EVP, Chief Admin Ofr, GC & Sec | Sale | 682 | $129K | Mar 6 | — | SEC ↗ | |
Noel Eugene MFirst filing | EVP & Chief Operating Officer | Sale | 41,209 | $7.9M | Mar 4 | — | SEC ↗ |
Congress trading AMT 91 all-time
- DRep. Ro KhannaSale$1,001 - $15,0002025-09-05
- DRep. Ro KhannaSale$1,001 - $15,0002025-09-29
- RRep. Rich McCormickPurchase$1,001 - $15,0002023-03-15
- RRep. Rich McCormickPurchase$1,001 - $15,0002023-03-15
- DRep. Ritchie TorresOther$1,001 - $15,0002025-07-11
- DRep. Ritchie TorresOther$1,001 - $15,0002025-07-11
STOCK Act disclosures are filed up to 45 days after the trade. Amount is a disclosed range, not an exact figure.
Frequently asked questions
How many SEC Form 4 insider filings does AMT have?
AMERICAN TOWER CORP (AMT) has 37 SEC Form 4 filings (79 transaction rows) in the rolling 365-day window, disclosed by 8 distinct insiders. Most recent filing: Oct 22, 2026.
When was the most recent SEC Form 4 filing for AMT?
The most recent Form 4 filing for AMT on Tracefour is dated Oct 22, 2026.
Who is the most active insider at AMT?
The most active SEC Form 4 filer at AMT in the rolling window is Director Clarke Teresa Hillary, with 15 filings.
What is the net insider flow at AMT over the last 6 months?
Over the trailing 180 days, insiders at AMT have net sold $813K based on SEC Form 4 disclosures.
What is the total insider buy and sell value at AMT in the current window?
Inside the rolling window, insiders at AMT bought $2.1M and sold $23.2M based on SEC Form 4 filings.
Can I get alerts for AMT insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at AMERICAN TOWER CORP (AMT). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
AMERICAN TOWER CORP is in the Real Estate sector.