Tomas Navratil insider trades: GLAUKOS (GKOS) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Tomas reports to the SEC
Open-market buys and sales
12 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Oct 30, 2026 | GKOS | ↓ Sell | 44,436 | $238.97 | $10.6M | Direct | Nov 3, 2026 (4d) |
| Oct 5, 2026 | GKOS | ↓ Sell | 1,527 | $164.45 | $251K | Direct | Oct 7, 2026 (2d) |
| Sep 25, 2026 | GKOS | ↓ Sell | 1,615 | $154.28 | $249K | Direct | Sep 28, 2026 (3d) |
| Sep 16, 2026 | GKOS | ↓ Sell | 1,457 | $166.92 | $243K | Direct | Sep 18, 2026 (2d) |
| Aug 28, 2026 | GKOS | ↓ Sell | 13,744 | $180.67 | $2.5M | Direct | Sep 1, 2026 (4d) |
| Jul 1, 2026 | GKOS | ↓ Sell | 716 | $139.06 | $100K | Direct | Jul 8, 2026 (7d) |
| Jun 16, 2026 | GKOS | ↓ Sell | 1,537 | $130.68 | $201K | Direct | Jun 18, 2026 (2d) |
| Apr 10, 2026 | GKOS | ↓ Sell | 2,093 | $117.62 | $246K | Direct | Apr 14, 2026 (4d) |
| Mar 16, 2026 | GKOS | ↓ Sell | 1,031 | $98.04 | $101K | Direct | Mar 19, 2026 (3d) |
| Sep 22, 2025 | GKOS | ↓ Sell | 517 | $84.22 | $44K | Direct | Sep 24, 2025 (2d) |
| Sep 11, 2025 | GKOS | ↓ Sell | 5,142 | $88.22 | $454K | Direct | Sep 12, 2025 (1d) |
| Feb 14, 2025 | GKOS | ↓ Sell | 3,416 | $147.14 | $503K | Direct | Feb 19, 2025 (5d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other GKOS insiders
Open-market trades in the last 12 months
About Tomas Navratil's insider trades
Tomas Navratil is Chief Development Officer at GLAUKOS (GKOS). Since Feb 14, 2025, Tomas has reported no open-market purchases and 12 sales worth $15.5M on SEC Form 4. In the last 12 months: 9 sales ($14.5M).
Their filings also include shares withheld for taxes (37 filings), grants and awards (11 filings), option exercises (1 filing). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every GKOS insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.