GKOS's three largest insider shareholders as of March 23, 2026 are Thomas William Burns (Chairman Ceo, 961.28K shares), Thomas William Burns (Chairman Ceo, 250.46K shares), Chris M. Calcaterra (Chief Operating Officer, 181.59K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Thomas William Burns | Chairman Ceo | 0 | 961,285 | 10 Feb, 2026 |
| Thomas William Burns | Chairman Ceo | 242,451 | 0 | 19 Mar, 2026 |
| Joseph E Gilliam | President Coo | 87,658 | 0 | 19 Mar, 2026 |
| Tomas Navratil | Chief Development Officer | 73,631 | 0 | 19 Mar, 2026 |
| Alex R. Thurman | Svp Chief Financial Officer | 49,249 | 0 | 19 Mar, 2026 |
| Aimee S Weisner | 18,806 | 29,505 | 23 Feb, 2026 | |
| Marc Stapley | 37,449 | 0 | 26 Jan, 2026 | |
| Gilbert H Kliman | 35,528 | 0 | 07 Jan, 2026 | |
| David F Hoffmeister | 32,671 | 0 | 07 Jan, 2026 | |
| Denice Torres | 22,334 | 0 | 07 Jan, 2026 | |
| Leana Wen | 21,439 | 0 | 07 Jan, 2026 | |
| William J Phd Link | 17,821 | 0 | 07 Jun, 2021 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 16 Mar, 2026 | Joseph E Gilliam | Common Stock | D | 1,189 | $98.94 | 87,658 | D | F |
| 16 Mar, 2026 | Thomas William Burns | Common Stock | D | 2,801 | $98.94 | 242,451 | D | F |
| 16 Mar, 2026 | Alex R. Thurman | Common Stock | D | 614 | $98.94 | 49,874 | D | F |
| 16 Mar, 2026 | Tomas Navratil | Common Stock | D | 958 | $98.94 | 74,662 | D | F |
| 16 Mar, 2026 | Tomas Navratil | Common Stock | D | 460 | $97.33 | 74,202 | D | S |
| 17 Mar, 2026 | Alex R. Thurman | Common Stock | D | 625 | $99.15 | 49,249 | D | S |
| 16 Mar, 2026 | Tomas Navratil | Common Stock | D | 299 | $98.21 | 73,903 | D | S |
| 16 Mar, 2026 | Tomas Navratil | Common Stock | D | 272 | $99.05 | 73,631 | D | S |
| 13 Mar, 2026 | Tomas Navratil | Common Stock | D | 1,074 | $97.02 | 75,620 | D | F |
| 13 Mar, 2026 | Thomas William Burns | Common Stock | D | 5,212 | $97.02 | 245,252 | D | F |
| 13 Mar, 2026 | Joseph E Gilliam | Common Stock | D | 2,462 | $97.02 | 88,847 | D | F |
| 05 Mar, 2026 | Tomas Navratil | Common Stock | D | 361 | $112.10 | 76,694 | D | F |
| 05 Mar, 2026 | Thomas William Burns | Common Stock | D | 1,098 | $112.10 | 250,464 | D | F |
| 24 Feb, 2026 | Thomas William Burns | Common Stock | D | 4,059 | $119.17 | 251,562 | D | F |
| 24 Feb, 2026 | Tomas Navratil | Common Stock | D | 396 | $119.17 | 77,055 | D | F |
| 24 Feb, 2026 | Joseph E Gilliam | Common Stock | D | 1,057 | $119.17 | 91,309 | D | F |
| 19 Feb, 2026 | Aimee S Weisner | Common Stock | D | 980 | $0.00 | 18,806 | D | G |
| 19 Feb, 2026 | Aimee S Weisner | Common Stock | A | 980 | $0.00 | 29,505 | I | G |
| 19 Feb, 2026 | Aimee S Weisner | Common Stock | A | 15,000 | $24.69 | 33,806 | D | M |
| 19 Feb, 2026 | Aimee S Weisner | Common Stock | D | 2,153 | $115.69 | 31,653 | D | S |