Navratil Tomas, chief development officer at GKOS, has filed 55 Form 4 transactions, all in a single company. The pattern is one-sided. There are no open-market purchases, no acquisitions, and no exercises of options. Every discretionary trade is a sale. Across all filings, Tomas has sold $4,371,423.66 worth of GKOS stock and bought none.
The recent activity shows the same direction. In the 23 most recent filings, all but two are open-market sales, coded S. The two exceptions are coded F, shares withheld to cover taxes, which are automatic and not a decision. The selling has been steady and clustered. On August 28, 2026, Tomas filed three sales totaling roughly $2.48 million, including a single transaction of $1,377,650.75 and another of $1,103,628.29. On September 16, 2026, seven sales ranged from $688 to $76,967.20. On September 25, four sales totaled about $249,158. On October 5, three sales added up to roughly $251,120.
The dollar values vary widely, from a $688 sale to the seven-figure transactions in late August. The frequency has increased in the fall. Between April and June, Tomas filed sales on four dates. Between July and October, he filed on five dates, with the August cluster alone accounting for more than half of his total sell value. There is no buying bias to offset the selling. The record is a consistent reduction of GKOS holdings through open-market sales, with the largest transactions occurring in the most recent quarter.
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