Navratil Tomas

Officer · GKOS

As of 2026-09-16, Navratil Tomas has 52 Form 4 transactions on record across 1 company — 34 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $12.1MIndirect: $0$12.1Mas of 2026-09-16
  • Direct $12.1M
  • Indirect $0
GKOSdirect73,890 sh$12.1M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

GKOS · 52 trades
2026-08-28: Sale, 7,643 sh ($1.4M)2026-08-28: Sale, 6,091 sh ($1.1M)2026-08-28: Sale, 10 sh ($2K)2026-07-01: Sale, 716 sh ($100K)2026-06-25: Withheld for tax, 483 sh ($69K)2026-06-16: Sale, 1,537 sh ($201K)2026-04-10: Sale, 1,237 sh ($144K)2026-04-10: Sale, 614 sh ($73K)2026-04-10: Sale, 210 sh ($25K)2026-04-10: Sale, 32 sh ($4K)2026-04-02: Withheld for tax, 1,831 sh ($201K)2026-04-02: Withheld for tax, 1,146 sh ($126K)2026-03-31: Withheld for tax, 5,798 sh ($635K)2026-03-25: Award / grant, 11,693 sh ($0)2026-03-25: Award / grant, 12,774 sh ($0)2026-03-25: Award / grant, 3,692 sh ($0)2026-03-25: Award / grant, 4,622 sh ($0)2026-03-24: Withheld for tax, 2,546 sh ($268K)2026-03-23: Withheld for tax, 2,628 sh ($281K)2026-03-16: Withheld for tax, 958 sh ($95K)2026-03-16: Sale, 460 sh ($45K)2026-03-16: Sale, 299 sh ($29K)2026-03-16: Sale, 272 sh ($27K)2026-03-13: Withheld for tax, 1,074 sh ($104K)2026-03-05: Withheld for tax, 361 sh ($40K)2026-02-24: Withheld for tax, 396 sh ($47K)2025-12-30: Withheld for tax, 510 sh ($58K)2025-12-11: Award / grant, 2,054 sh ($0)2025-09-23: Withheld for tax, 483 sh ($41K)2025-09-22: Sale, 276 sh ($23K)2025-09-22: Sale, 218 sh ($18K)2025-09-22: Sale, 23 sh ($2K)2025-09-19: Withheld for tax, 510 sh ($43K)2025-09-18: Award / grant, 1,948 sh ($0)2025-09-11: Sale, 3,194 sh ($281K)2025-09-11: Sale, 1,948 sh ($173K)2025-05-27: Withheld for tax, 483 sh ($47K)2025-05-07: Withheld for tax, 510 sh ($45K)2025-04-01: Withheld for tax, 484 sh ($47K)2025-03-31: Withheld for tax, 510 sh ($50K)2025-03-25: Withheld for tax, 5,112 sh ($550K)2025-03-25: Withheld for tax, 1,830 sh ($177K)2025-03-17: Withheld for tax, 958 sh ($98K)2025-03-13: Award / grant, 3,691 sh ($0)2025-03-13: Award / grant, 12,422 sh ($0)2025-03-13: Award / grant, 1,948 sh ($0)2025-02-14: Sale, 3,416 sh ($503K)2025-01-06: Withheld for tax, 1,185 sh ($177K)2024-12-31: Withheld for tax, 255 sh ($39K)2024-12-30: Award / grant, 2,054 sh ($0)2024-12-20: Withheld for tax, 509 sh ($74K)2024-12-20: Withheld for tax, 484 sh ($67K)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-08-28GKOSSale7,643 @ $180.25$1.4M−8.7% of holding79,991Form 4
2026-08-28GKOSSale6,091 @ $181.19$1.1M−7.6% of holding73,900Form 4
2026-08-28GKOSSale10 @ $182.50$2K−0.0% of holding73,890Form 4
2026-07-01GKOSSale716 @ $139.06$100K−0.8% of holding87,634Form 4
2026-06-16GKOSSale1,537 @ $130.68$201K−1.7% of holding88,833Form 4
2026-04-10GKOSSale1,237 @ $116.72$144K−1.3% of holding91,226Form 4
2026-04-10GKOSSale614 @ $119.35$73K−0.7% of holding90,402Form 4
2026-04-10GKOSSale210 @ $117.45$25K−0.2% of holding91,016Form 4
2026-04-10GKOSSale32 @ $120.23$4K−0.0% of holding90,370Form 4
2026-03-16GKOSSale460 @ $97.33$45K−0.6% of holding74,202Form 4
2026-03-16GKOSSale299 @ $98.21$29K−0.4% of holding73,903Form 4
2026-03-16GKOSSale272 @ $99.05$27K−0.4% of holding73,631Form 4
2025-09-22GKOSSale276 @ $84.70$23K−0.4% of holding76,390Form 4
2025-09-22GKOSSale218 @ $83.76$18K−0.3% of holding76,666Form 4
2025-09-22GKOSSale23 @ $82.79$2K−0.0% of holding76,884Form 4
2025-09-11GKOSSale3,194 @ $87.98$281K−4.0% of holding77,417Form 4
2025-09-11GKOSSale1,948 @ $88.61$173K−2.5% of holding75,469Form 4
2025-02-14GKOSSale3,416 @ $147.14$503K−4.5% of holding72,437Form 4
34 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-06-25GKOSWithheld for tax48388,350Form 4
2026-04-02GKOSWithheld for tax1,83192,463Form 4
2026-04-02GKOSWithheld for tax1,14694,294Form 4
2026-03-31GKOSWithheld for tax5,79895,440Form 4
2026-03-25GKOSAward / grant11,69384,772Form 4
2026-03-25GKOSAward / grant12,774101,238Form 4
2026-03-25GKOSAward / grant3,69288,464Form 4
2026-03-25GKOSAward / grant4,62273,079Form 4
2026-03-24GKOSWithheld for tax2,54668,457Form 4
2026-03-23GKOSWithheld for tax2,62871,003Form 4
2026-03-16GKOSWithheld for tax95874,662Form 4
2026-03-13GKOSWithheld for tax1,07475,620Form 4
2026-03-05GKOSWithheld for tax36176,694Form 4
2026-02-24GKOSWithheld for tax39677,055Form 4
2025-12-30GKOSWithheld for tax51077,451Form 4
2025-12-11GKOSAward / grant2,05477,961Form 4
2025-09-23GKOSWithheld for tax48375,907Form 4
2025-09-19GKOSWithheld for tax51076,907Form 4
2025-09-18GKOSAward / grant1,94877,417Form 4
2025-05-27GKOSWithheld for tax48380,611Form 4
2025-05-07GKOSWithheld for tax51081,094Form 4
2025-04-01GKOSWithheld for tax48481,604Form 4
2025-03-31GKOSWithheld for tax51082,088Form 4
2025-03-25GKOSWithheld for tax5,11284,428Form 4
2025-03-25GKOSWithheld for tax1,83082,598Form 4
2025-03-17GKOSWithheld for tax95889,540Form 4
2025-03-13GKOSAward / grant3,69178,076Form 4
2025-03-13GKOSAward / grant12,42290,498Form 4
2025-03-13GKOSAward / grant1,94874,385Form 4
2025-01-06GKOSWithheld for tax1,18575,853Form 4
2024-12-31GKOSWithheld for tax25577,038Form 4
2024-12-30GKOSAward / grant2,05477,293Form 4
2024-12-20GKOSWithheld for tax50975,723Form 4
2024-12-20GKOSWithheld for tax48475,239Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.