Zagorski Mark, chief executive officer of DoubleVerify Holdings (DV), has filed 57 Form 4 transactions across two companies, but the pattern is almost entirely mechanical. His total open-market purchases and sales are both zero. The only cash value in his filings is $4,328 in acquired shares, a figure dwarfed by the routine tax-withholding events that dominate his recent activity.
The recent filings, all in DV, cluster around quarterly vesting dates. On September 30, 2026, Zagorski had shares worth $92,811.20 withheld to cover taxes, paired with an option exercise valued at zero. The September 15, 2026 batch shows the same structure: multiple option exercises at no cost, followed by tax-withholding sales totaling roughly $419,188. That sum includes individual withholdings of $157,963.50, $104,895, $83,551.50, $53,770.50, and $19,008. The June 2026 filings repeat the pattern, with option exercises and tax withholdings of $129,918.75, $86,274.25, $68,716, $44,228.75, and $15,631.25, plus a June 30 withholding of $80,790.52.
The code legend clarifies the picture. The "M" entries are option exercises, which are mechanical and carry no cash value. The "F" entries are shares withheld to cover tax obligations, automatic events that do not reflect a discretionary sale. Zagorski has not filed a single open-market purchase or sale in the data. His activity is compensation-driven: he exercises options on a schedule and immediately surrenders a portion of the shares to pay the tax bill. There is no directional bias in his trading, because he is not trading. He is receiving equity grants and letting the tax system take its cut.
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