Navratil Tomas Insider Trading Activity

Corporate InsiderCHIEF DEVELOPMENT OFFICER · CIK 1920053

Total trades

$844K

Total volume

Apr 10, 2026

Last activity

GKOS

GLAUKOS Corp

Navratil Tomas has been net-selling over the last 12 months with 0 purchases and 12 sales across 1 company.

GKOS is the most-traded position with 12 trades. The largest single transaction was a sale of GKOS for $281K on Sep 11, 2025.

Performance Scorecard

Forward stock performance after each transaction by Navratil Tomas. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.

PERIOD	AVG BUY RETURN	AVG SELL AVOIDED	SUCCESS RATE	TRADES
30 days	—	-7.5%	42%	12
90 days	—	-33.1%	0%	5
120 days	—	-39.6%	0%	5

Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.

Price & Trades

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GKOS · GLAUKOS Corp

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Recent Trades

DATE	TICKER	TYPE	SHARES	PRICE	VALUE	ROLE
Apr 10, 2026	GKOS	Sell	1,237	$116.72	$144K	CHIEF DEVELOPMENT OFFICER
Apr 10, 2026	GKOS	Sell	210	$117.45	$25K	CHIEF DEVELOPMENT OFFICER
Apr 10, 2026	GKOS	Sell	614	$119.35	$73K	CHIEF DEVELOPMENT OFFICER
Apr 10, 2026	GKOS	Sell	32	$120.23	$4K	CHIEF DEVELOPMENT OFFICER
Mar 16, 2026	GKOS	Sell	460	$97.33	$45K	CHIEF DEVELOPMENT OFFICER
Mar 16, 2026	GKOS	Sell	299	$98.21	$29K	CHIEF DEVELOPMENT OFFICER
Mar 16, 2026	GKOS	Sell	272	$99.05	$27K	CHIEF DEVELOPMENT OFFICER
Sep 22, 2025	GKOS	Sell	23	$82.79	$2K	CHIEF DEVELOPMENT OFFICER
Sep 22, 2025	GKOS	Sell	218	$83.76	$18K	CHIEF DEVELOPMENT OFFICER
Sep 22, 2025	GKOS	Sell	276	$84.70	$23K	CHIEF DEVELOPMENT OFFICER
Sep 11, 2025	GKOS	Sell	3,194	$87.98	$281K	CHIEF DEVELOPMENT OFFICER
Sep 11, 2025	GKOS	Sell	1,948	$88.61	$173K	CHIEF DEVELOPMENT OFFICER