Tomas Navratil
Insider
First SEC filing: April 5, 2022 · Latest: June 18, 2026
Insider at
Insider transactions
0 buys (P)
23 sells (S)
Net: $-3,623,143
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 25, 2026 | GKOS | S 10b5-1 | 167 | $151.70 | $25,334 | 72,266 Direct | -0.23% | Disposed | 7.9% (price as of 2026-10-02) |
| Sept. 25, 2026 | GKOS | S 10b5-1 | 136 | $152.71 | $20,769 | 72,130 Direct | -0.19% | Disposed | 7.2% (price as of 2026-10-02) |
| Sept. 25, 2026 | GKOS | S 10b5-1 | 229 | $154.24 | $35,321 | 71,901 Direct | -0.32% | Disposed | 6.2% (price as of 2026-10-02) |
| Sept. 25, 2026 | GKOS | S 10b5-1 | 1,083 | $154.88 | $167,735 | 70,818 Direct | -1.51% | Disposed | 5.7% (price as of 2026-10-02) |
| Sept. 16, 2026 | GKOS | S 10b5-1 | 103 | $163.20 | $16,810 | 73,787 Direct | -0.14% | Disposed | 0.3% (price as of 2026-10-02) |
| Sept. 16, 2026 | GKOS | S 10b5-1 | 345 | $164.60 | $56,787 | 73,442 Direct | -0.47% | Disposed | -0.5% (price as of 2026-10-02) |
| Sept. 16, 2026 | GKOS | S 10b5-1 | 191 | $166.20 | $31,744 | 73,251 Direct | -0.26% | Disposed | -1.5% (price as of 2026-10-02) |
| Sept. 16, 2026 | GKOS | S 10b5-1 | 460 | $167.32 | $76,967 | 72,791 Direct | -0.63% | Disposed | -2.1% (price as of 2026-10-02) |
| Sept. 16, 2026 | GKOS | S 10b5-1 | 120 | $168.38 | $20,206 | 72,671 Direct | -0.16% | Disposed | -2.7% (price as of 2026-10-02) |
| Sept. 16, 2026 | GKOS | S 10b5-1 | 234 | $170.95 | $40,002 | 72,437 Direct | -0.32% | Disposed | -4.2% (price as of 2026-10-02) |
| Sept. 16, 2026 | GKOS | S 10b5-1 | 4 | $172.00 | $688 | 72,433 Direct | -0.01% | Disposed | -4.8% (price as of 2026-10-02) |
| Aug. 28, 2026 | GKOS | S | 7,643 | $180.25 | $1,377,651 | 79,991 Direct | -8.72% | Disposed | -9.2% (price as of 2026-10-02) |
| Aug. 28, 2026 | GKOS | S | 6,091 | $181.19 | $1,103,628 | 73,900 Direct | -7.61% | Disposed | -9.6% (price as of 2026-10-02) |
| Aug. 28, 2026 | GKOS | S | 10 | $182.50 | $1,825 | 73,890 Direct | -0.01% | Disposed | -10.3% (price as of 2026-10-02) |
| July 1, 2026 | GKOS | S 10b5-1 | 716 | $139.06 | $99,567 | 87,634 Direct | -0.81% | Disposed | 17.8% (price as of 2026-10-02) |
| June 25, 2026 | GKOS | F | 483 | $142.57 | $68,861 | 88,350 Direct | -0.54% | Disposed | 14.9% (price as of 2026-10-02) |
| June 16, 2026 | GKOS | S 10b5-1 | 1,537 | $130.68 | $200,855 | 88,833 Direct | -1.70% | Disposed | 25.3% (price as of 2026-10-02) |
| April 10, 2026 | GKOS | S 10b5-1 | 1,237 | $116.72 | $144,383 | 91,226 Direct | -1.34% | Disposed | 40.3% (price as of 2026-10-02) |
| April 10, 2026 | GKOS | S 10b5-1 | 210 | $117.45 | $24,664 | 91,016 Direct | -0.23% | Disposed | 39.4% (price as of 2026-10-02) |
| April 10, 2026 | GKOS | S 10b5-1 | 614 | $119.35 | $73,281 | 90,402 Direct | -0.67% | Disposed | 37.2% (price as of 2026-10-02) |
| April 10, 2026 | GKOS | S 10b5-1 | 32 | $120.23 | $3,847 | 90,370 Direct | -0.04% | Disposed | 36.2% (price as of 2026-10-02) |
| April 2, 2026 | GKOS | F | 1,146 | $109.60 | $125,602 | 94,294 Direct | -1.20% | Disposed | 49.4% (price as of 2026-10-02) |
| April 2, 2026 | GKOS | F | 1,831 | $109.60 | $200,678 | 92,463 Direct | -1.94% | Disposed | 49.4% (price as of 2026-10-02) |
| March 31, 2026 | GKOS | F | 5,798 | $109.60 | $635,461 | 95,440 Direct | -5.73% | Disposed | 49.4% (price as of 2026-10-02) |
| March 25, 2026 | GKOS | A | 4,622 | · | · | 73,079 Direct | +6.75% | Acquired | (price as of 2026-10-02) |
| March 25, 2026 | GKOS | A | 11,693 | · | · | 84,772 Direct | +16.00% | Acquired | (price as of 2026-10-02) |
| March 25, 2026 | GKOS | A | 3,692 | · | · | 88,464 Direct | +4.36% | Acquired | (price as of 2026-10-02) |
| March 25, 2026 | GKOS | A | 12,774 | · | · | 101,238 Direct | +14.44% | Acquired | (price as of 2026-10-02) |
| March 24, 2026 | GKOS | F | 2,546 | $105.23 | $267,916 | 68,457 Direct | -3.59% | Disposed | 55.6% (price as of 2026-10-02) |
| March 23, 2026 | GKOS | F | 2,628 | $106.84 | $280,776 | 71,003 Direct | -3.57% | Disposed | 53.3% (price as of 2026-10-02) |
| March 16, 2026 | GKOS | F | 958 | $98.94 | $94,785 | 74,662 Direct | -1.27% | Disposed | 65.5% (price as of 2026-10-02) |
| March 16, 2026 | GKOS | S 10b5-1 | 460 | $97.33 | $44,772 | 74,202 Direct | -0.62% | Disposed | 68.2% (price as of 2026-10-02) |
| March 16, 2026 | GKOS | S 10b5-1 | 299 | $98.21 | $29,365 | 73,903 Direct | -0.40% | Disposed | 66.7% (price as of 2026-10-02) |
| March 16, 2026 | GKOS | S 10b5-1 | 272 | $99.05 | $26,942 | 73,631 Direct | -0.37% | Disposed | 65.3% (price as of 2026-10-02) |
| March 13, 2026 | GKOS | F | 1,074 | $97.02 | $104,199 | 75,620 Direct | -1.40% | Disposed | 68.8% (price as of 2026-10-02) |
| March 5, 2026 | GKOS | F | 361 | $112.10 | $40,468 | 76,694 Direct | -0.47% | Disposed | 46.1% (price as of 2026-10-02) |
| Feb. 24, 2026 | GKOS | F | 396 | $119.17 | $47,191 | 77,055 Direct | -0.51% | Disposed | 37.4% (price as of 2026-10-02) |
| Dec. 30, 2025 | GKOS | F | 510 | $114.24 | $58,262 | 77,451 Direct | -0.65% | Disposed | 43.3% (price as of 2026-10-02) |
| Dec. 11, 2025 | GKOS | A | 2,054 | · | · | 77,961 Direct | +2.71% | Acquired | (price as of 2026-10-02) |
| Sept. 23, 2025 | GKOS | F | 483 | $84.69 | $40,905 | 75,907 Direct | -0.63% | Disposed | 93.4% (price as of 2026-10-02) |
| Sept. 22, 2025 | GKOS | S 10b5-1 | 23 | $82.79 | $1,904 | 76,884 Direct | -0.03% | Disposed | 97.8% (price as of 2026-10-02) |
| Sept. 22, 2025 | GKOS | S 10b5-1 | 218 | $83.76 | $18,260 | 76,666 Direct | -0.28% | Disposed | 95.5% (price as of 2026-10-02) |
| Sept. 22, 2025 | GKOS | S 10b5-1 | 276 | $84.70 | $23,377 | 76,390 Direct | -0.36% | Disposed | 93.3% (price as of 2026-10-02) |
| Sept. 19, 2025 | GKOS | F | 510 | $83.47 | $42,570 | 76,907 Direct | -0.66% | Disposed | 96.2% (price as of 2026-10-02) |
| Sept. 18, 2025 | GKOS | A | 1,948 | · | · | 77,417 Direct | +2.58% | Acquired | (price as of 2026-10-02) |
| Sept. 11, 2025 | GKOS | S 10b5-1 | 3,194 | $87.98 | $281,008 | 77,417 Direct | -3.96% | Disposed | 86.1% (price as of 2026-10-02) |
| Sept. 11, 2025 | GKOS | S 10b5-1 | 1,948 | $88.61 | $172,612 | 75,469 Direct | -2.52% | Disposed | 84.8% (price as of 2026-10-02) |
| May 27, 2025 | GKOS | F | 483 | $96.97 | $46,837 | 80,611 Direct | -0.60% | Disposed | 68.9% (price as of 2026-10-02) |
| May 7, 2025 | GKOS | F | 510 | $88.24 | $45,002 | 81,094 Direct | -0.62% | Disposed | 85.6% (price as of 2026-10-02) |
| April 1, 2025 | GKOS | F | 484 | $97.09 | $46,992 | 81,604 Direct | -0.59% | Disposed | 68.7% (price as of 2026-10-02) |
| March 31, 2025 | GKOS | F | 510 | $98.42 | $50,194 | 82,088 Direct | -0.62% | Disposed | 66.4% (price as of 2026-10-02) |
| March 25, 2025 | GKOS | F | 5,112 | $107.61 | $550,102 | 84,428 Direct | -5.71% | Disposed | 52.2% (price as of 2026-10-02) |
| March 25, 2025 | GKOS | F | 1,830 | $96.60 | $176,778 | 82,598 Direct | -2.17% | Disposed | 69.5% (price as of 2026-10-02) |
| March 17, 2025 | GKOS | F | 958 | $102.19 | $97,898 | 89,540 Direct | -1.06% | Disposed | 60.2% (price as of 2026-10-02) |
| March 13, 2025 | GKOS | A | 1,948 | · | · | 74,385 Direct | +2.69% | Acquired | (price as of 2026-10-02) |
| March 13, 2025 | GKOS | A | 3,691 | · | · | 78,076 Direct | +4.96% | Acquired | (price as of 2026-10-02) |
| March 13, 2025 | GKOS | A | 12,422 | · | · | 90,498 Direct | +15.91% | Acquired | (price as of 2026-10-02) |
| Feb. 14, 2025 | GKOS | S 10b5-1 | 3,416 | $147.14 | $502,630 | 72,437 Direct | -4.50% | Disposed | 11.3% (price as of 2026-10-02) |
| Jan. 6, 2025 | GKOS | F | 1,185 | $149.68 | $177,371 | 75,853 Direct | -1.54% | Disposed | 9.4% (price as of 2026-10-02) |
| Dec. 31, 2024 | GKOS | F | 255 | $151.16 | $38,546 | 77,038 Direct | -0.33% | Disposed | 8.3% (price as of 2026-10-02) |
| Dec. 30, 2024 | GKOS | A | 2,054 | · | · | 77,293 Direct | +2.73% | Acquired | (price as of 2026-10-02) |
| Dec. 20, 2024 | GKOS | F | 509 | $145.14 | $73,876 | 75,723 Direct | -0.67% | Disposed | 12.8% (price as of 2026-10-02) |
| Dec. 20, 2024 | GKOS | F | 484 | $138.93 | $67,242 | 75,239 Direct | -0.64% | Disposed | 17.9% (price as of 2026-10-02) |
| Oct. 15, 2024 | GKOS | F | 510 | $130.07 | $66,336 | 76,232 Direct | -0.66% | Disposed | 25.9% (price as of 2026-10-02) |
| Sept. 19, 2024 | GKOS | A | 4,108 | · | · | 76,742 Direct | +5.66% | Acquired | (price as of 2026-10-02) |
| Aug. 6, 2024 | GKOS | F | 520 | $120.73 | $62,780 | 72,634 Direct | -0.71% | Disposed | 35.6% (price as of 2026-10-02) |
| June 24, 2024 | GKOS | F | 260 | $93.57 | $24,328 | 73,414 Direct | -0.35% | Disposed | 75.0% (price as of 2026-10-02) |
| June 24, 2024 | GKOS | F | 260 | $92.69 | $24,099 | 73,154 Direct | -0.35% | Disposed | 76.7% (price as of 2026-10-02) |
| April 1, 2024 | GKOS | F | 494 | $93.10 | $45,991 | 73,674 Direct | -0.67% | Disposed | 75.9% (price as of 2026-10-02) |
| March 28, 2024 | GKOS | F | 2,418 | $88.08 | $212,977 | 76,771 Direct | -3.05% | Disposed | 85.9% (price as of 2026-10-02) |
| March 28, 2024 | GKOS | F | 2,603 | $88.72 | $230,938 | 74,168 Direct | -3.39% | Disposed | 84.6% (price as of 2026-10-02) |
| March 25, 2024 | GKOS | F | 459 | $87.16 | $40,006 | 79,189 Direct | -0.58% | Disposed | 87.9% (price as of 2026-10-02) |
| March 14, 2024 | GKOS | A | 1,950 | · | · | 67,546 Direct | +2.97% | Acquired | (price as of 2026-10-02) |
| March 14, 2024 | GKOS | A | 1,027 | · | · | 68,573 Direct | +1.52% | Acquired | (price as of 2026-10-02) |
| March 14, 2024 | GKOS | A | 11,075 | · | · | 79,648 Direct | +16.15% | Acquired | (price as of 2026-10-02) |
| Jan. 12, 2024 | GKOS | F | 1,209 | $77.08 | $93,190 | 65,596 Direct | -1.81% | Disposed | 112.4% (price as of 2026-10-02) |
| Dec. 8, 2023 | GKOS | A | 1,027 | · | · | 66,805 Direct | +1.56% | Acquired | (price as of 2026-10-02) |
| Nov. 10, 2023 | GKOS | F | 509 | $68.83 | $35,034 | 65,778 Direct | -0.77% | Disposed | 137.9% (price as of 2026-10-02) |
| Sept. 14, 2023 | GKOS | A | 2,052 | · | · | 66,287 Direct | +3.19% | Acquired | (price as of 2026-10-02) |
| Sept. 8, 2023 | GKOS | F | 483 | $74.72 | $36,090 | 64,235 Direct | -0.75% | Disposed | 119.2% (price as of 2026-10-02) |
| May 4, 2023 | GKOS | F | 178 | $49.31 | $8,777 | 64,718 Direct | -0.27% | Disposed | 232.1% (price as of 2026-10-02) |
| April 17, 2023 | GKOS | F | 445 | $48.69 | $21,667 | 64,896 Direct | -0.68% | Disposed | 236.3% (price as of 2026-10-02) |
| April 6, 2023 | GKOS | F | 338 | $49.51 | $16,734 | 65,341 Direct | -0.51% | Disposed | 230.7% (price as of 2026-10-02) |
| March 24, 2023 | GKOS | F | 1,776 | $49.35 | $87,646 | 65,679 Direct | -2.63% | Disposed | 231.8% (price as of 2026-10-02) |
| March 22, 2023 | GKOS | A | 23,387 | · | · | 63,861 Direct | +57.78% | Acquired | (price as of 2026-10-02) |
| March 22, 2023 | GKOS | A | 3,594 | · | · | 67,455 Direct | +5.63% | Acquired | (price as of 2026-10-02) |
| March 1, 2023 | GKOS | F | 178 | $48.51 | $8,635 | 40,474 Direct | -0.44% | Disposed | 237.6% (price as of 2026-10-02) |
| Feb. 15, 2023 | GKOS | F | 356 | $50.26 | $17,893 | 40,652 Direct | -0.87% | Disposed | 225.8% (price as of 2026-10-02) |
| Jan. 26, 2023 | GKOS | F | 885 | $43.88 | $38,834 | 41,364 Direct | -2.09% | Disposed | 273.2% (price as of 2026-10-02) |
| Jan. 26, 2023 | GKOS | F | 356 | $46.15 | $16,429 | 41,008 Direct | -0.86% | Disposed | 254.8% (price as of 2026-10-02) |
| Jan. 11, 2023 | GKOS | F | 1,299 | $43.88 | $57,000 | 42,638 Direct | -2.96% | Disposed | 273.2% (price as of 2026-10-02) |
| Jan. 11, 2023 | GKOS | F | 389 | $45.17 | $17,571 | 42,249 Direct | -0.91% | Disposed | 262.5% (price as of 2026-10-02) |
| Dec. 15, 2022 | GKOS | A | 5,135 | · | · | 43,937 Direct | +13.23% | Acquired | (price as of 2026-10-02) |
| Nov. 25, 2022 | GKOS | F | 338 | $53.41 | $18,053 | 38,802 Direct | -0.86% | Disposed | 206.6% (price as of 2026-10-02) |
| Sept. 15, 2022 | GKOS | A | 1,949 | · | · | 39,140 Direct | +5.24% | Acquired | (price as of 2026-10-02) |
| April 19, 2022 | GKOS | F | 338 | $60.47 | $20,439 | 37,191 Direct | -0.90% | Disposed | 170.8% (price as of 2026-10-02) |
| April 1, 2022 | GKOS | F | 337 | $60.78 | $20,483 | 37,529 Direct | -0.89% | Disposed | 169.4% (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.