Quentin A. Fendelet's Stock Transactions in VICOR CORP

On October 23, 2025, Quentin A. Fendelet, Corporate VP - CAO of VICOR CORP, engaged in multiple transactions involving the company's common stock and non-qualified stock options. Fendelet sold 153 shares of common stock at $84.36 per share, acquired 4,963 shares at $33.96 per share, and subsequently sold the same amount at $88.3421 per share. Additionally, Fendelet acquired 915 shares at $60.61 per share and sold them at $88.3421 per share, acquired 4,530 shares at $41.61 per share and sold them at $88.3421 per share, and acquired 6,000 shares at $71.74 per share and sold them at $88.3421 per share. Fendelet also exercised non-qualified stock options, resulting in the acquisition of 4,963, 915, 4,530, and 6,000 shares of common stock at various prices. These transactions were reported in a Form 4 filing with the SEC.