GKOS (Glaukos Corporation)
Insider Trading Activity
Every open-market purchase and sale reported by GKOS officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-01 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | Sell | — | — |
| 2026-08-20 | Gilbert H Kliman | Director | MIXED | — | — |
| 2026-08-13 | Joseph E Gilliam | PRESIDENT & COO | MIXED | — | — |
| 2026-08-11 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | — |
| 2026-08-03 | LEANA WEN | Director | Sell | — | — |
| 2026-07-21 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | — |
| 2026-07-13 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | — |
| 2026-07-08 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | Sell | — | — |
| 2026-07-08 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | — |
| 2026-06-29 | Joseph E Gilliam | PRESIDENT & COO | F | — | — |
| 2026-06-29 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | F | — | — |
| 2026-06-29 | Thomas William Burns | CHAIRMAN & CEO | F | — | — |
| 2026-06-23 | Mark J Foley | Director | A | — | — |
| 2026-06-23 | Gilbert H Kliman | Director | A | — | — |
| 2026-06-23 | Denice Torres | Director | A | — | — |
| 2026-06-23 | David F Hoffmeister | Director | A | — | — |
| 2026-06-23 | LEANA WEN | Director | A | — | — |
| 2026-06-23 | Marc Stapley | Director | A | — | — |
| 2026-06-23 | AIMEE S WEISNER | Director | A | — | — |
| 2026-06-18 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | Sell | — | — |
| 2026-06-01 | LEANA WEN | Director | A | — | — |
| 2026-06-01 | Gilbert H Kliman | Director | A | — | — |
| 2026-06-01 | AIMEE S WEISNER | Director | A | — | — |
| 2026-06-01 | Marc Stapley | Director | A | — | — |
| 2026-06-01 | Mark J Foley | Director | A | — | — |
| 2026-06-01 | David F Hoffmeister | Director | A | — | — |
| 2026-06-01 | Denice Torres | Director | A | — | — |
| 2026-05-28 | David F Hoffmeister | Director | M | — | — |
| 2026-05-18 | Gilbert H Kliman | Director | MIXED | — | — |
| 2026-05-13 | Gilbert H Kliman | Director | MIXED | — | — |
| 2026-05-04 | Joseph E Gilliam | PRESIDENT & COO | Sell | — | — |
| 2026-05-04 | LEANA WEN | Director | Sell | — | — |
| 2026-05-04 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | — |
| 2026-04-14 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | Sell | — | — |
| 2026-04-03 | Joseph E Gilliam | PRESIDENT & COO | F | — | — |
| 2026-04-03 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | F | — | — |
| 2026-04-03 | Thomas William Burns | CHAIRMAN & CEO | MIXED | — | — |
| 2026-04-03 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | F | — | — |
| 2026-04-02 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | F | — | — |
| 2026-03-27 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | A | — | — |
| 2026-03-27 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | — |
| 2026-03-27 | Thomas William Burns | CHAIRMAN & CEO | A | — | — |
| 2026-03-27 | Joseph E Gilliam | PRESIDENT & COO | A | — | — |
| 2026-03-25 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | — |
| 2026-03-25 | Joseph E Gilliam | PRESIDENT & COO | F | — | — |
| 2026-03-25 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | F | — | — |
| 2026-03-25 | Thomas William Burns | CHAIRMAN & CEO | F | — | — |
| 2026-03-19 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | MIXED | — | — |
| 2026-03-19 | Joseph E Gilliam | PRESIDENT & COO | F | — | — |
| 2026-03-19 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 3,209,812 | — |
| — | 10%+ Owner | 2,972,501 | — |
| — | 10%+ Owner | 2,603,362 | — |
| — | 10%+ Owner | 2,603,362 | — |
| — | 10%+ Owner | 2,077,660 | — |
| — | Director | 1,628,111 | — |
| — | Director | 1,249,793 | — |
| — | 10%+ Owner | 876,083 | — |
| — | CFO & Treasurer | 213,701 | — |
| — | CHAIRMAN & CEO | 188,967 | — |
| — | Chief Operating Officer | 181,594 | — |
| — | Director | 159,798 | — |
| — | 10%+ Owner | 132,483 | — |
| — | PRESIDENT & COO | 122,588 | — |
| — | Director | 87,725 | — |
| — | CHIEF DEVELOPMENT OFFICER | 73,890 | — |
| — | Director | 66,790 | — |
| — | SVP & CHIEF FINANCIAL OFFICER | 63,906 | — |
| — | Director | 60,267 | — |
| — | Director | 58,300 | — |
| — | Director | 54,177 | — |
| — | — | 46,804 | — |
| — | Director | 39,906 | — |
| — | Director | 39,327 | — |
| — | Director | 24,212 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the GKOS quote page; the site-wide leaderboard is on the insider transactions hub.