| Insiders | Shares | % | Avg Price | Total $ | |
|---|---|---|---|---|---|
| Buys | 2 | +8,225 | 6.6% | $181.04 | +$1,489,047 |
| Sells | 6 | -115,544 | 93% | $190.51 | -$22,011,792 |
| Net | -4 | -107,319 | -87% | -$20,522,745 |
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Report Date |
|---|---|---|---|---|---|
| Amit Sharma | Former Officer | $66,773,588 | 01 Jul 2021 | ||
| Thomas A. Bartlett | Former Officer | $50,696,138 | 01 May 2024 | ||
| Edmund DiSanto | Former Officer | $37,936,577 | 01 Jul 2023 | ||
| Vondran Steven O | President and CEO, Director | $20,494,267 | -$6,309,967 | -24% | 10 Mar 2026 |
| Rodney M. Smith | EVP, CFO & Treasurer | $17,415,478 | -$6,596,528 | -27% | 10 Mar 2026 |
| Joann A. Reed | Former Director | $13,299,222 | 14 May 2025 | ||
| Olivier Puech | Former Officer | $6,696,972 | 02 Jan 2026 | ||
| Eugene M. Noel | EVP & Chief Operating Officer | $6,500,458 | -$7,872,920 | -55% | 10 Mar 2026 |
| Dowling Ruth T. | EVP, Chief Admin Ofr, GC & Sec | $5,727,186 | -$250,685 | -4.2% | 10 Mar 2026 |
| Sanjay Goel | Former Officer | $5,486,095 | 31 Mar 2025 | ||
| Juan Font | SVP, Pres. & CEO, CoreSite | $5,335,562 | -$149,998 | -2.7% | 10 Mar 2026 |
| Robert Joseph Meyer | SVP & Chief Accounting Officer | $4,975,555 | -$831,695 | -14% | 10 Mar 2026 |
| Samme L. Thompson | Former Director | $4,451,710 | 22 May 2024 | ||
| Pamela D. A. Reeve | Director | $4,121,172 | 10 Mar 2026 | ||
| Raymond P. Dolan | Former Director | $3,602,839 | 22 May 2024 | ||
| Richard C. Rossi | EVP & President, U.S. Tower | $3,296,712 | 10 Mar 2026 | ||
| Craig Macnab | Director | $2,882,129 | 10 Mar 2026 | ||
| Gustavo Lara | Former Director | $2,300,132 | 18 May 2022 | ||
| Robert D. Hormats | Director | $1,806,059 | 10 Mar 2026 | ||
| Grace Lieblein | Director | $1,720,244 | 10 Mar 2026 | ||
| Bruce L. Tanner | Director | $1,306,038 | 10 Mar 2026 | ||
| Eugene F. Reilly | Director | $1,298,134 | +$994,110 | +327% | 10 Mar 2026 |
| Kenneth R. Frank | Director | $1,164,519 | 10 Mar 2026 | ||
| Teresa Hillary Clarke | Director | $998,724 | 10 Mar 2026 | ||
| Rajesh Kalathur | Director | $946,820 | +$494,936 | +110% | 10 Mar 2026 |
| Kelly C. Chambliss | Director | $832,928 | 10 Mar 2026 | ||
| David E. Sharbutt | Former Director | $524,643 | 24 May 2023 | ||
| Neville R. Ray | Director | $426,250 | 10 Mar 2026 |
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Richard C. Rossi | AMT | Common Stock | Tax liability | -3.76% | -684 | 17,518 | 11 Mar 2026 | Direct | ||
| Juan Font | AMT | Common Stock | Tax liability | -3.17% | -928 | 28,352 | 11 Mar 2026 | Direct | ||
| Rodney M. Smith | AMT | Common Stock | Tax liability | -1.38% | -1,295 | 92,542 | 11 Mar 2026 | Direct | ||
| Robert Joseph Meyer | AMT | Common Stock | Tax liability | -2.52% | -684 | 26,439 | 11 Mar 2026 | Direct | ||
| Dowling Ruth T. | AMT | Common Stock | Tax liability | -2.76% | -863 | 30,433 | 11 Mar 2026 | Direct | ||
| Eugene M. Noel | AMT | Common Stock | Tax liability | -2.04% | -719 | 34,542 | 11 Mar 2026 | Direct | ||
| Vondran Steven O | AMT | Common Stock | Tax liability | -1.94% | -2,158 | 108,902 | 11 Mar 2026 | Direct | ||
| Richard C. Rossi | AMT | Common Stock | Tax liability | -7.82% | -1,544 | 18,202 | 10 Mar 2026 | Direct | ||
| Richard C. Rossi | AMT | Common Stock | Award | 48.5% | 6,448 | 19,746 | 10 Mar 2026 | Direct | ||
| Juan Font | AMT | Common Stock | Tax liability | -5.89% | -1,834 | 29,280 | 10 Mar 2026 | Direct | ||
| Juan Font | AMT | Common Stock | Award | 35% | 8,060 | 31,114 | 10 Mar 2026 | Direct | ||
| Rodney M. Smith | AMT | Common Stock | Tax liability | -11.7% | -12,433 | 93,837 | 10 Mar 2026 | Direct | ||
| Rodney M. Smith | AMT | Common Stock | Award | 11% | 10,531 | 106,270 | 10 Mar 2026 | Direct | ||
| Robert Joseph Meyer | AMT | Common Stock | Tax liability | -4.8% | -1,368 | 27,123 | 10 Mar 2026 | Direct | ||
| Robert Joseph Meyer | AMT | Common Stock | Award | 16.5% | 4,030 | 28,491 | 10 Mar 2026 | Direct | ||
| Dowling Ruth T. | AMT | Common Stock | Tax liability | -17.5% | -6,629 | 31,296 | 10 Mar 2026 | Direct | ||
| Dowling Ruth T. | AMT | Common Stock | Award | 22.2% | 6,878 | 37,925 | 10 Mar 2026 | Direct | ||
| Eugene M. Noel | AMT | Common Stock | Tax liability | -6.62% | -2,498 | 35,261 | 10 Mar 2026 | Direct | ||
| Eugene M. Noel | AMT | Common Stock | Award | 27.6% | 8,167 | 37,759 | 10 Mar 2026 | Direct | ||
| Vondran Steven O | AMT | Common Stock | Tax liability | -12.1% | -15,269 | 111,060 | 10 Mar 2026 | Direct | ||
| Vondran Steven O | AMT | Common Stock | Award | 19.9% | 20,955 | 126,329 | 10 Mar 2026 | Direct | ||
| Kelly C. Chambliss | AMT | Common Stock | Award | 37.6% | 1,209 | 4,426 | 10 Mar 2026 | Direct | ||
| Craig Macnab | AMT | Common Stock | Award | 8.57% | 1,209 | 15,315 | 10 Mar 2026 | Direct | ||
| Rajesh Kalathur | AMT | Common Stock | Purchase | 117.9% | $494,936 | $185.30 | 2,671 | 4,936 | 10 Mar 2026 | Direct |
| Rajesh Kalathur | AMT | Common Stock | Award | 114.5% | 1,209 | 2,265 | 10 Mar 2026 | Direct | ||
| Robert D. Hormats | AMT | Common Stock | Award | 14.4% | 1,209 | 9,597 | 10 Mar 2026 | Direct | ||
| Teresa Hillary Clarke | AMT | Common Stock | Award | 29.5% | 1,209 | 5,307 | 10 Mar 2026 | Direct | ||
| Pamela D. A. Reeve | AMT | Common Stock | Award | 5.84% | 1,209 | 21,899 | 10 Mar 2026 | Direct | ||
| Neville R. Ray | AMT | Common Stock | Award | 114.5% | 1,209 | 2,265 | 10 Mar 2026 | Direct | ||
| Eugene F. Reilly | AMT | Common Stock | Award | 21.2% | 1,209 | 6,898 | 10 Mar 2026 | Direct | ||
| Bruce L. Tanner | AMT | Common Stock | Award | 21.1% | 1,209 | 6,940 | 10 Mar 2026 | Direct | ||
| Grace Lieblein | AMT | Common Stock | Award | 15.2% | 1,209 | 9,141 | 10 Mar 2026 | Direct | ||
| Kenneth R. Frank | AMT | Common Stock | Award | 24.3% | 1,209 | 6,188 | 10 Mar 2026 | Direct | ||
| Vondran Steven O | AMT | Common Stock | Sale | -24.1% | $6,309,967 | $188.46 | -33,482 | 105,374 | 04 Mar 2026 | Direct |
| Vondran Steven O | AMT | Common Stock | Options Exercise | 31.8% | 33,482 | 138,856 | 04 Mar 2026 | Direct | ||
| Vondran Steven O | AMT | Option to Purchase Common Stock | Options Exercise | -100% | -33,482 | 0 | 04 Mar 2026 | Direct | ||
| Dowling Ruth T. | AMT | Common Stock | Sale | -2.15% | $128,564 | $188.51 | -682 | 31,047 | 04 Mar 2026 | Direct |
| Eugene M. Noel | AMT | Common Stock | Sale | -58.2% | $7,872,920 | $191.05 | -41,209 | 29,592 | 02 Mar 2026 | Direct |
| Eugene M. Noel | AMT | Common Stock | Options Exercise | 139.3% | 41,209 | 70,801 | 02 Mar 2026 | Direct | ||
| Eugene M. Noel | AMT | Option to Purchase Common Stock | Options Exercise | -100% | -41,209 | 0 | 02 Mar 2026 | Direct | ||
| Dowling Ruth T. | AMT | Common Stock | Sale | -2.03% | $122,121 | $186.16 | -656 | 31,729 | 27 Feb 2026 | Direct |
| Robert Joseph Meyer | AMT | Common Stock | Sale | -15.4% | $831,695 | $186.73 | -4,454 | 24,461 | 27 Feb 2026 | Direct |
| Dowling Ruth T. | AMT | Common Stock | Award | 52% | 11,083 | 32,385 | 25 Feb 2026 | Direct | ||
| Rodney M. Smith | AMT | Common Stock | Award | 28.8% | 21,425 | 95,739 | 25 Feb 2026 | Direct | ||
| Vondran Steven O | AMT | Common Stock | Award | 30.5% | 24,626 | 105,374 | 25 Feb 2026 | Direct | ||
| Rodney M. Smith | AMT | Common Stock | Sale | -31.6% | $6,596,528 | $192.09 | -34,341 | 74,314 | 17 Feb 2026 | Direct |
| Rodney M. Smith | AMT | Common Stock | Options Exercise | 46.2% | 34,341 | 108,655 | 17 Feb 2026 | Direct | ||
| Rodney M. Smith | AMT | Option to Purchase Common Stock | Options Exercise | -100% | -34,341 | 0 | 17 Feb 2026 | Direct | ||
| Juan Font | AMT | Common Stock | Tax liability | -1.79% | -419 | 23,054 | 03 Jan 2026 | Direct | ||
| Eugene F. Reilly | AMT | Common Stock | Purchase | 4114.1% | $994,110 | $178.99 | 5,554 | 5,689 | 31 Oct 2025 | Direct |