Vicor Corp CEO & Founder Files Form 144 to Sell $6.17M in Common Stock

Executive Summary

On October 2, 2026, Patrizio Vinciarelli, Founder, CEO, Director, and 10% Stockholder of Vicor Corp ($VICR), filed Form 144 indicating an intent to sell 20,000 shares of common stock through Morgan Stanley Smith Barney LLC. The estimated aggregate market value of the proposed transaction is $6,171,800.00 (approximately $308.59 per share).

Transaction Details

• Security: Common Stock
• Shares to be Sold: 20,000
• Aggregate Market Value: $6,171,800.00
• Approximate Sale Date: October 2, 2026
• Acquisition Origin: Founder's shares acquired on November 10, 1981
• Shares Outstanding: 34,389,014 (~0.06% of outstanding shares)
• Rule 10b5-1 Plan: The sale is governed by a pre-established Rule 10b5-1 trading plan adopted on February 26, 2026.

Prior Sales in Past 3 Months

• October 1, 2026: 20,000 shares for gross proceeds of $6,322,515.64
• July 6, 2026: 700 shares for gross proceeds of $211,680.98

Market & Trading Significance

This filing carries High significance due to Vinciarelli's status as the company's founder and chief executive. While sales conducted under Rule 10b5-1 plans are structured in advance to mitigate insider trading concerns, back-to-back 20,000-share tranches totaling over $12.4M in potential gross proceeds represent notable liquidity activity by top leadership.