Vicor Corp Chairman and CEO Patrizio Vinciarelli Sells 25,943 Shares Under Rule 10b5-1 Plan

This SEC Form 4 filing reports that Patrizio Vinciarelli, Chairman and CEO of Vicor Corporation, sold 25,943 shares of common stock on April 9, 2026, through multiple transactions at prices ranging from $186 to $189 per share. The sales were executed pursuant to a Rule 10b5-1 trading plan adopted on November 3, 2025, which allows insiders to pre-schedule stock sales to avoid accusations of trading on nonpublic information. The transactions reduced Vinciarelli's direct holdings from approximately 8.98 million shares to 8.96 million shares. He also indirectly holds 171,125 shares through the Patrizio Vinciarelli Irrevocable Trust established for the benefit of his child. As a 10% owner, officer, and director, Vinciarelli remains a significant shareholder despite these sales. The filing was signed by an attorney-in-fact on April 10, 2026.