Form 4: Viant CEO Vanderhook Reports Significant Stock Sales

Viant Technology Inc. CEO Timothy Vanderhook reported a series of transactions involving Class A and Class B common stock, including conversions and sales under a 10b5-1 plan.

Summary

• Timothy Vanderhook, CEO and Chairman of Viant Technology Inc., reported changes in his beneficial ownership of company securities.
• On January 20, 2026, 12,500 Class B Units were exchanged for an equal number of Class A Common Stock, resulting in the cancellation of 12,500 Class B Common Stock.
• Following the conversion, 12,500 shares of Class A Common Stock were acquired at a price of $0.
• A total of 12,500 Class A Common Stock shares were sold indirectly by Capital V LLC, in which Mr. Vanderhook holds a one-third interest, across three separate dates.
• Sales occurred on January 20, 2026 (5,000 shares at $11.9403), January 21, 2026 (4,926 shares at $12.2405), and January 22, 2026 (2,574 shares at $12.8716).
• All reported sales were executed pursuant to a Rule 10b5-1 plan adopted by Capital V LLC on March 18, 2025, and amended on September 17, 2025.
• After these transactions, Mr. Vanderhook's indirect beneficial ownership of Class A Common Stock through Capital V LLC is 0 shares, while his indirect beneficial ownership of Class B Common Stock and Class B Units through Capital V LLC remains 9,144,775.

Sentiment

Score: 4

Explanation: The sentiment is slightly negative due to significant insider selling by the CEO, even though it was conducted under a pre-arranged 10b5-1 plan. While such plans mitigate the perception of opportunistic selling, they still represent a reduction in the insider's equity exposure.

Negatives

• The CEO and Chairman, Timothy Vanderhook, reduced his indirect beneficial ownership of Class A Common Stock through sales, which can be perceived as a lack of confidence in the company's near-term stock performance.
• The sales occurred at weighted average prices ranging from $11.9403 to $12.8716, indicating the insider is taking profits or reducing exposure.

Risks

• Insider selling by a key executive like the CEO could lead to negative market sentiment and potentially impact the company's stock price.
• While sales were made under a 10b5-1 plan, the reduction in direct and indirect Class A stock holdings by the CEO might signal a perceived ceiling in the stock's valuation by management.

Future Outlook

This filing does not contain any forward-looking statements or guidance regarding the company's future outlook.

Industry Context

This insider transaction report is specific to Viant Technology Inc. and does not provide broader industry trends or competitive analysis. However, insider selling can sometimes be a leading indicator of management's perception of the company's valuation relative to its industry peers.

Related Party Transactions

• The transactions involve Timothy Vanderhook, the CEO and Chairman, and Capital V LLC, in which he holds a one-third interest, making these related-party dealings in the context of beneficial ownership changes.

Stakeholder Impact

• Shareholders may interpret the CEO's stock sales as a signal regarding the company's future prospects or current valuation, potentially leading to a negative impact on investor confidence and stock price.

Key Dates

Recommendation

The CEO's decision to sell a substantial portion of his Class A Common Stock, even under a 10b5-1 plan, typically signals that the insider believes the stock is fully valued or that better opportunities exist elsewhere. For a seasoned investor, this action by a top executive often serves as a bearish indicator, suggesting a reduction in exposure or a 'sell' recommendation, especially if there are no clear positive catalysts to offset this insider selling.

Keywords

Viant Technology, DSP, Timothy Vanderhook, Insider Trading, Form 4, Stock Sale, 10b5-1 Plan, Beneficial Ownership, Class A Common Stock, Class B Common Stock, Class B Units