Form 4: Viant Technology CEO Sells Shares Under Trading Plan

Viant Technology CEO and Chairman Timothy Vanderhook sold 12,500 shares of Class A common stock as part of a pre-arranged Rule 10b5-1 trading plan.

Summary

• CEO Timothy Vanderhook executed the sale of 12,500 shares of Class A common stock over a three-day period from May 19 to May 21, 2026.
• The transactions involved the conversion of 12,500 Class B units into Class A common stock on a one-for-one basis, followed by the immediate sale of those shares.
• Sales were conducted at weighted average prices ranging from $10.5956 to $10.8872 per share.
• The total proceeds from the 12,500 shares sold across the three days amounted to approximately $134,500 based on the reported weighted averages.
• Following these transactions, the reporting person continues to hold an indirect interest in 9,094,775 Class B units through Capital V LLC.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event. While insider selling is rarely a positive catalyst, the use of a 10b5-1 plan and the small size of the sale relative to the CEO's total 9-million-share stake suggests this is routine financial planning.

Positives

• The sales were made pursuant to a Rule 10b5-1 trading plan, which was established well in advance (March 2025) to avoid concerns regarding insider trading.
• The CEO maintains a very large equity position in the company, with over 9 million units remaining after this relatively small liquidation.
• The conversion of Class B units to Class A shares for sale is a standard liquidity mechanism for founders in this corporate structure.

Negatives

• Insider selling, regardless of the reason, can sometimes be interpreted by the market as a lack of near-term catalysts or a signal that management views the current price as fair value.
• The sales occurred during a period where the share price showed some volatility, with the weighted average price dropping from $10.88 to $10.59 within 24 hours.

Risks

• The reporting person holds a significant 10% owner status, meaning future large-scale liquidations could create downward pressure on the stock price.
• Market volatility may impact the execution prices of remaining tranches within the 10b5-1 trading plan.

Future Outlook

The filing indicates that the reporting person is operating under an amended 10b5-1 plan, suggesting that additional scheduled sales may occur in future periods as part of a structured diversification strategy.

Management Comments

• The reporting person undertakes to provide full information regarding the number of shares sold at each separate price within the ranges reported upon request.

Industry Context

StockSavvy.ai notes that in the AdTech sector, it is common for founders of recently public companies to utilize 10b5-1 plans to gradually diversify their wealth while maintaining majority voting control through Class B share structures.

Comparison to Industry Standards

• The use of a 10b5-1 plan is a best-practice standard for C-suite executives at NASDAQ-listed companies like The Trade Desk or Magnite to mitigate legal risks.
• The volume of this sale (12,500 shares) is negligible compared to the total shares outstanding, which is consistent with 'drip' selling strategies used by major tech executives.
• The conversion of multi-class stock units prior to sale is a standard procedure for companies with Up-C organizational structures.

Corporate Governance

Related Party Transactions

• The transactions were conducted through Capital V LLC, an entity in which the reporting person holds a one-third interest.

Stakeholder Impact

• Shareholders: Minimal impact due to the low volume of shares sold relative to daily trading liquidity.
• Management: Demonstrates the CEO's continued reliance on structured plans for personal liquidity.

Next Steps

• Monitor future Form 4 filings for continued selling activity under the same 10b5-1 plan.
• Observe if other key insiders or 10% owners begin similar liquidation patterns.

Key Dates

Recommendation

The insider selling is programmatic and small in scale. Investors should focus more on the company's quarterly earnings and revenue growth in the competitive AdTech space rather than this routine administrative filing.

Keywords

Viant Technology, DSP, Timothy Vanderhook, Insider Selling, Form 4, 10b5-1 Plan, AdTech, Capital V LLC, Class A Common Stock