GLAUKOS Corp (GKOS) Insider Trading
Directors, officers and holders of more than 10% of GKOS report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 320 transactions on file: 0 with code P, 27 with code S and 23 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 5, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 312 | $165.60 | $51,667 |
| Oct 5, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 327 | $164.78 | $53,883 |
| Oct 5, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 888 | $163.93 | $145,570 |
| Sep 25, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 229 | $154.24 | $35,321 |
| Sep 25, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 136 | $152.71 | $20,769 |
| Sep 25, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 167 | $151.70 | $25,334 |
| Sep 25, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 1,083 | $154.88 | $167,735 |
| Sep 16, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 120 | $168.38 | $20,206 |
| Sep 16, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 191 | $166.20 | $31,744 |
| Sep 16, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 103 | $163.20 | $16,810 |
| Sep 16, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 4 | $172.00 | $688 |
| Sep 16, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 234 | $170.95 | $40,002 |
| Sep 16, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 460 | $167.32 | $76,967 |
| Sep 16, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 345 | $164.60 | $56,787 |
| Aug 28, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 7,643 | $180.25 | $1,377,651 |
| Aug 28, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 10 | $182.50 | $1,825 |
| Aug 28, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 6,091 | $181.19 | $1,103,628 |
| Aug 19, 2026 | Kliman Gilbert H | Director | M Exercise | 2,500 | Not measured | Not measured |
| Aug 19, 2026 | Kliman Gilbert H | Director | M Exercise | 2,500 | $25.77 | $64,425 |
| Aug 19, 2026 | Kliman Gilbert H | Director | S Sale | 2,500 | $190.00 | $475,000 |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | M Exercise | 20,000 | $55.18 | $1,103,600 |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | M Exercise | 10,000 | $48.46 | $484,600 |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | M Exercise | 20,000 | Not measured | Not measured |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | M Exercise | 20,000 | $55.18 | $1,103,600 |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | M Exercise | 10,000 | Not measured | Not measured |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | M Exercise | 20,000 | Not measured | Not measured |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | S Sale | 32,037 | $180.49 | $5,782,358 |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | M Exercise | 10,000 | $48.46 | $484,600 |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | S Sale | 27,963 | $178.89 | $5,002,301 |
| Aug 11, 2026 | Gilliam Joseph E | PRESIDENT & COO | M Exercise | 10,000 | Not measured | Not measured |
| Aug 7, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | M Exercise | 20,000 | Not measured | Not measured |
| Aug 7, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | S Sale | 20,000 | $180.13 | $3,602,600 |
| Aug 7, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | M Exercise | 20,000 | $33.81 | $676,200 |
| Jul 31, 2026 | WEN LEANA | Director | S Sale | 525 | $167.63 | $88,006 |
| Jul 16, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | M Exercise | 10,000 | $38.68 | $386,800 |
| Jul 16, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | S Sale | 10,000 | $160.00 | $1,600,000 |
| Jul 16, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | M Exercise | 10,000 | Not measured | Not measured |
| Jul 9, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | S Sale | 10,000 | $155.00 | $1,550,000 |
| Jul 9, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | M Exercise | 10,000 | Not measured | Not measured |
| Jul 9, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | M Exercise | 10,000 | $38.68 | $386,800 |
| Jul 6, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | S Sale | 10,000 | $150.00 | $1,500,000 |
| Jul 6, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | M Exercise | 10,000 | $38.68 | $386,800 |
| Jul 6, 2026 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | M Exercise | 10,000 | $38.68 | $386,800 |
| Jul 1, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 716 | $139.06 | $99,567 |
| Jun 25, 2026 | Burns Thomas William | CHAIRMAN & CEO | F Tax Payment | 4,059 | $142.57 | $578,692 |
| Jun 25, 2026 | Gilliam Joseph E | PRESIDENT & COO | F Tax Payment | 1,056 | $142.57 | $150,554 |
| Jun 25, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | F Tax Payment | 483 | $142.57 | $68,861 |
| Jun 16, 2026 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | S Sale | 1,537 | $130.68 | $200,855 |
| May 28, 2026 | Kliman Gilbert H | Director | A Award | 1,878 | Not measured | Not measured |
| May 28, 2026 | WEN LEANA | Director | A Award | 1,878 | Not measured | Not measured |
The full Form 4 history is on the GKOS company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.