GKOS · Insider Trading
Glaukos Corporation
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-07 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | Sell | −1,527 | −$251.12K |
| 2026-09-28 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | Sell | −1,615 | −$249.16K |
| 2026-09-18 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | Sell | −1,457 | −$243.20K |
| 2026-09-01 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | Sell | −13,744 | −$2.48M |
| 2026-08-20 | Gilbert H Kliman | Director | MIXED | — | −$410.57K |
| 2026-08-13 | Joseph E Gilliam | PRESIDENT & COO | MIXED | — | −$7.61M |
| 2026-08-11 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | −$2.93M |
| 2026-08-03 | Leana Wen | Director | Sell | −525 | −$88.01K |
| 2026-07-21 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | −$1.21M |
| 2026-07-13 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | −$1.16M |
| 2026-07-08 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | Sell | −716 | −$99.57K |
| 2026-07-08 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | −$1.11M |
| 2026-06-29 | Joseph E Gilliam | PRESIDENT & COO | F | −1,056 | −$150.55K |
| 2026-06-29 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | F | −483 | −$68.86K |
| 2026-06-29 | Thomas William Burns | CHAIRMAN & CEO | F | −4,059 | −$578.69K |
| 2026-06-23 | Mark J Foley | Director | A | +2,987 deriv. | — |
| 2026-06-23 | Gilbert H Kliman | Director | A | +2,987 deriv. | — |
| 2026-06-23 | Denice Torres | Director | A | +2,987 deriv. | — |
| 2026-06-23 | David F Hoffmeister | Director | A | +2,987 deriv. | — |
| 2026-06-23 | Leana Wen | Director | A | +2,987 deriv. | — |
| 2026-06-23 | Marc Stapley | Director | A | +2,987 deriv. | — |
| 2026-06-23 | Aimee S Weisner | Director | A | +2,987 deriv. | — |
| 2026-06-18 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | Sell | −1,537 | −$200.86K |
| 2026-06-01 | Leana Wen | Director | A | +1,878 | — |
| 2026-06-01 | Gilbert H Kliman | Director | A | +1,878 | — |
| 2026-06-01 | Aimee S Weisner | Director | A | +1,878 | — |
| 2026-06-01 | Marc Stapley | Director | A | +1,878 | — |
| 2026-06-01 | Mark J Foley | Director | A | +1,878 | — |
| 2026-06-01 | David F Hoffmeister | Director | A | +1,878 | — |
| 2026-06-01 | Denice Torres | Director | A | +1,878 | — |
| 2026-05-28 | David F Hoffmeister | Director | M | +15,000 | +$370.35K |
| 2026-05-18 | Gilbert H Kliman | Director | MIXED | — | −$580.35K |
| 2026-05-13 | Gilbert H Kliman | Director | MIXED | — | −$551.55K |
| 2026-05-04 | Joseph E Gilliam | PRESIDENT & COO | Sell | −19,573 | −$2.81M |
| 2026-05-04 | Leana Wen | Director | Sell | −1,700 | −$243.69K |
| 2026-05-04 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | — | −$1.01M |
| 2026-04-14 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | Sell | −2,093 | −$246.18K |
| 2026-04-03 | Joseph E Gilliam | PRESIDENT & COO | F | −3,169 | −$347.32K |
| 2026-04-03 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | F | −1,589 | −$174.15K |
| 2026-04-03 | Thomas William Burns | CHAIRMAN & CEO | MIXED | −9,937 | −$1.09M |
| 2026-04-03 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | F | −2,977 | −$326.28K |
| 2026-04-02 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | F | −5,798 | −$635.46K |
| 2026-03-27 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | A | +32,781 | — |
| 2026-03-27 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | +792 | −$267.32K |
| 2026-03-27 | Thomas William Burns | CHAIRMAN & CEO | A | +23,564 | — |
| 2026-03-27 | Joseph E Gilliam | PRESIDENT & COO | A | +23,621 | — |
| 2026-03-25 | Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | MIXED | −4,771 | −$504.05K |
| 2026-03-25 | Joseph E Gilliam | PRESIDENT & COO | F | −15,118 | −$1.60M |
| 2026-03-25 | Tomas Navratil | CHIEF DEVELOPMENT OFFICER | F | −5,174 | −$548.69K |
| 2026-03-25 | Thomas William Burns | CHAIRMAN & CEO | F | −2,744 | −$288.75K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Thomas William Burns | CHAIRMAN & CEO | 188,967 | $34.24M |
| Joseph E Gilliam | PRESIDENT & COO | 122,588 | $22.21M |
| David F Hoffmeister | Director | 87,725 | $15.89M |
| Tomas Navratil | CHIEF DEVELOPMENT OFFICER | 69,930 | $12.67M |
| Alex R. Thurman | SVP & CHIEF FINANCIAL OFFICER | 63,906 | $11.58M |
| Mark J Foley | Director | 60,267 | $10.92M |
| Gilbert H Kliman | Director | 39,906 | $7.23M |
| Marc Stapley | Director | 39,327 | $7.12M |
| Denice Torres | Director | 24,212 | $4.39M |
| Aimee S Weisner | Director | 22,684 | $4.11M |
| Leana Wen | Director | 21,092 | $3.82M |
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.
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.