Form 4: Vicor CEO Sells 20,000 Shares Under 10b5-1 Plan

Vicor Corp's Chairman and CEO, Patrizio Vinciarelli, sold 20,000 shares of common stock for over $2 million on December 19, 2025, under a pre-arranged 10b5-1 trading plan.

Summary

• Patrizio Vinciarelli, Chairman and CEO of Vicor Corp, executed sales of 20,000 shares of common stock on December 19, 2025.
• The shares were sold in three separate transactions at prices of $102.4352, $103.3001, and $104 per share.
• The total value of the shares sold amounts to approximately $2,060,326.12.
• These transactions were conducted pursuant to a Rule 10b5-1 trading plan, which was adopted by the reporting person on December 10, 2024.
• Following these sales, Patrizio Vinciarelli directly beneficially owns 9,808,363 shares of Vicor Corp common stock.
• An additional 171,125 shares are held indirectly by the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of his child.

Sentiment

Score: 5

Explanation: The sentiment is neutral as the transaction is a pre-planned sale under a 10b5-1 plan, which typically indicates a scheduled liquidity event rather than a reaction to new company-specific information.

Positives

• The sale was conducted under a Rule 10b5-1 trading plan, indicating a pre-scheduled transaction rather than a reaction to immediate market conditions or non-public information, which enhances transparency.

Negatives

• The sale of 20,000 shares by the Chairman and CEO, even if pre-planned, could be perceived by some investors as a lack of confidence in the company's short-term prospects.

Related Party Transactions

• 171,125 shares are held indirectly by the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the Reporting Person.

Stakeholder Impact

• Shareholders may interpret the sale by the CEO as a signal, potentially leading to short-term negative sentiment, although the 10b5-1 plan mitigates concerns about opportunistic selling.

Key Dates

Recommendation

The sale of shares by the Chairman and CEO, Patrizio Vinciarelli, was executed under a pre-arranged Rule 10b5-1 trading plan. Such plans are established in advance and are not typically indicative of new material information or a change in management's outlook on the company's future performance. Therefore, this event is generally considered neutral for investment decisions, warranting a 'hold' recommendation based solely on this filing.

Keywords

Vicor, VICR, insider trading, stock sale, 10b5-1 plan, Patrizio Vinciarelli, CEO, Director, 10% Owner