// company-profile
American Tower Corp /ma/
AMT// activity-summary
Recent insider activity is bearish. Over the last 30 days, insiders net sold $29K across 1 transaction.
// 90-day insight
Over the last 90 days, American Tower Corp /ma/ insiders sold $29K across 1 transaction with no open-market purchases.
- Most active insider: Dowling Ruth T with 2 transactions totaling $173K.
- Largest single sale: $99K by Dowling Ruth T on Apr 28, 2026.
- 67% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bearish — sales outpace buys.
Institutional Ownership
Top 13F-HR holders of American Tower Corp /ma/ as of 2026-03-31
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 1, 2026 | Meyer Robert Joseph | AMT | Tax Withholding | 153 | $187.53 | $29K |
| May 28, 2026 | REEVE PAMELA D A | AMT | Gift | 810 | $0.00 | $0K |
| Apr 29, 2026 | Dowling Ruth T | AMT | Sale10b5 | 416 | $177.54 | $74K |
| Apr 28, 2026 | Dowling Ruth T | AMT | Sale10b5 | 556 | $178.48 | $99K |
| Mar 11, 2026 | Smith Rodney M | AMT | Tax Withholding | 1,295 | $182.85 | $237K |
45 more transactions hidden
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