Insider Ledger
Glaukos Corp. (GKOS) insider buying and SEC filings
Glaukos Corp. · CIK 1192448
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Company profile
- Exchanges
- NYSE
- Industry (SIC)
- Surgical & Medical Instruments & Apparatus
- State of incorporation
- DE
- Fiscal year end
- Dec 31
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$18.0M
Planned sales (10b5-1)
$47.0M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Oct 30, 2026 | Sale | Tomas Navratil (Chief Development Officer) sold 44,436 shares at about $238.97 ($10.6M). Holdings down 54% to 37,328 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 3, 2026, 9:45 PM ET |
| Oct 5, 2026 | Planned (10b5-1) | Tomas Navratil (Chief Development Officer) sold 1,527 shares at about $164.45 ($251K), marked as a 10b5-1 plan trade. Holdings down 2% to 69,291 shares. | SEC filing Filed Oct 7, 2026, 7:07 PM ET |
| Sep 25, 2026 | Planned (10b5-1) | Tomas Navratil (Chief Development Officer) sold 1,615 shares at about $154.28 ($249K), marked as a 10b5-1 plan trade. Holdings down 2% to 70,818 shares. | SEC filing Filed Sep 28, 2026 |
| Sep 16, 2026 | Planned (10b5-1) | Tomas Navratil (Chief Development Officer) sold 1,457 shares at about $166.92 ($243K), marked as a 10b5-1 plan trade. Holdings down 2% to 72,433 shares. | SEC filing Filed Sep 18, 2026 |
| Aug 28, 2026 | Sale | Tomas Navratil (Chief Development Officer) sold 13,744 shares at about $180.67 ($2.5M). Holdings down 16% to 73,890 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 1, 2026 |
| Aug 7, 2026 | Planned (10b5-1) | Alex R. Thurman (CFO) sold 20,000 shares at about $180.13 ($3.6M), marked as a 10b5-1 plan trade. Holdings down 31% to 43,906 shares. | SEC filing Filed Aug 11, 2026 |
| Jul 31, 2026 | Sale | Leana Wen (Director) sold 525 shares at $167.63 ($88K). Holdings down 2% to 21,092 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 3, 2026 |
| Jul 16, 2026 | Planned (10b5-1) | Alex R. Thurman (CFO) sold 10,000 shares at $160.00 ($1.6M), marked as a 10b5-1 plan trade. Holdings down 19% to 43,906 shares. | SEC filing Filed Jul 21, 2026 |
| Jul 9, 2026 | Planned (10b5-1) | Alex R. Thurman (CFO) sold 10,000 shares at $155.00 ($1.6M), marked as a 10b5-1 plan trade. Holdings down 19% to 43,681 shares. | SEC filing Filed Jul 13, 2026 |
| Jul 6, 2026 | Planned (10b5-1) | Alex R. Thurman (CFO) sold 10,000 shares at $150.00 ($1.5M), marked as a 10b5-1 plan trade. Holdings down 19% to 43,681 shares. | SEC filing Filed Jul 8, 2026 |
| Jul 1, 2026 | Planned (10b5-1) | Tomas Navratil (Chief Development Officer) sold 716 shares at $139.06 ($100K), marked as a 10b5-1 plan trade. Holdings down 1% to 87,634 shares. | SEC filing Filed Jul 8, 2026 |
| Jun 16, 2026 | Planned (10b5-1) | Tomas Navratil (Chief Development Officer) sold 1,537 shares at $130.68 ($201K), marked as a 10b5-1 plan trade. Holdings down 2% to 88,833 shares. | SEC filing Filed Jun 18, 2026 |
| May 1, 2026 | Sale | Leana Wen (Director) sold 1,700 shares at $143.35 ($244K). Holdings down 8% to 19,739 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 4, 2026 |
| May 1, 2026 | Sale | Joseph E Gilliam (President / COO) sold 19,573 shares at $143.54 ($2.8M). Holdings down 21% to 73,419 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 4, 2026 |
| Apr 30, 2026 | Planned (10b5-1) | Alex R. Thurman (CFO) sold 10,000 shares at $140.00 ($1.4M), marked as a 10b5-1 plan trade. Holdings down 19% to 43,681 shares. | SEC filing Filed May 4, 2026 |
| Apr 10, 2026 | Planned (10b5-1) | Tomas Navratil (Chief Development Officer) sold 2,093 shares at about $117.62 ($246K), marked as a 10b5-1 plan trade. Holdings down 2% to 90,370 shares. | SEC filing Filed Apr 14, 2026 |
| Mar 25, 2026 | Planned (10b5-1) | Alex R. Thurman (CFO) sold 2,511 shares at $106.46 ($267K), marked as a 10b5-1 plan trade. Holdings down 6% to 41,967 shares. | SEC filing Filed Mar 27, 2026 |
| Mar 24, 2026 | Planned (10b5-1) | Alex R. Thurman (CFO) sold 1,521 shares at $105.24 ($160K), marked as a 10b5-1 plan trade. Holdings down 3% to 46,498 shares. | SEC filing Filed Mar 25, 2026 |
| Mar 17, 2026 | Planned (10b5-1) | Alex R. Thurman (CFO) sold 625 shares at $99.15 ($62K), marked as a 10b5-1 plan trade. Holdings down 1% to 49,249 shares. | SEC filing Filed Mar 19, 2026 |
| Mar 16, 2026 | Planned (10b5-1) | Tomas Navratil (Chief Development Officer) sold 1,031 shares at about $98.04 ($101K), marked as a 10b5-1 plan trade. Holdings down 1% to 73,631 shares. | SEC filing Filed Mar 19, 2026 |
| Jan 22, 2026 | Planned (10b5-1) | Joseph E Gilliam (President / COO) sold 10,498 shares at about $127.68 ($1.3M), marked as a 10b5-1 plan trade. Holdings down 10% to 92,366 shares. | SEC filing Filed Jan 26, 2026 |
| Jan 22, 2026 | Planned (10b5-1) | Marc Stapley (Director) sold 15,000 shares at about $127.71 ($1.9M), marked as a 10b5-1 plan trade. Holdings down 29% to 37,449 shares. | SEC filing Filed Jan 26, 2026 |
| Jan 21, 2026 | Planned (10b5-1) | Joseph E Gilliam (President / COO) sold 4,502 shares at about $124.65 ($561K), marked as a 10b5-1 plan trade. Holdings down 5% to 92,366 shares. | SEC filing Filed Jan 23, 2026 |
| Jan 8–16, 2026 | Planned (10b5-1) | Thomas William Burns (CEO and Director) sold 275,000 shares between Jan 8 and Jan 16 at $115.00 ($31.6M), marked as a 10b5-1 plan trade. Holdings down 64% to 153,775 shares. | SEC filing Filed Jan 20, 2026 |
| Nov 25, 2025 | Planned (10b5-1) | Alex R. Thurman (CFO) sold 315 shares at $105.00 ($33K), marked as a 10b5-1 plan trade. Holdings down 1% to 50,488 shares. | SEC filing Filed Nov 26, 2025 |
| Nov 18, 2025 | Sale | Joseph E Gilliam (President / COO) sold 19,340 shares at $90.00 ($1.7M). Holdings down 17% to 92,366 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 20, 2025 |
74 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
| Filed | Items | Tag | Source |
|---|---|---|---|
| Oct 28, 2026, 4:10 PM ET 8-K | Earnings released (Item 2.02) Reg FD disclosure (Item 7.01) | SEC filing |
Red flags are objective triggers only: the item or form filed, never an opinion.
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