Vanderhook Timothy, CEO and Chairman of Viant Technology (DSP), has filed 51 Form 4 transactions, all in that single company. The pattern is one-sided: zero open-market purchases and roughly $4.98 million in total sales. His recent activity, spanning March through September 2026, shows 14 sales with no buys.
The selling is clustered in recurring waves. In March 2026, he sold $33,354.87 worth of DSP stock. April brought three sales totaling about $136,980.86, followed by three more in May worth roughly $134,385.25. June saw the heaviest activity: four sales on June 15, 16, 17, and 18, cumulatively near $239,998. July added three sales on July 21, 22, and 23, worth about $137,644.22. The most recent transaction, on September 10, 2026, was a sale back to the issuer (code D) valued at $110,022.64.
Interspersed with these sales are option exercises (code M) and share withholdings for tax (code F), both valued at zero in the filings, plus a grant (code A) and a gift (code G) on June 9, 2026. The option exercises and tax withholdings are mechanical, but the open-market sales (code S) are discretionary. Across the entire filing history, Vanderhook has never reported a single open-market purchase of DSP shares. His total sell value of $4.98 million, against zero buy value, shows a consistent bias toward monetizing his position rather than adding to it.
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