Vicor VICR Insider Ownership

Updated Oct 11, 2026

Over the trailing 12 months, VICR insiders sold $423.93 million worth of shares (1.98Mn shares) in open-market trades, with no open-market purchases.

• Behind Vicor's open-market sales in the past 12 months were 18 insiders, and no insider bought.
• Patrizio Vinciarelli (Chairman & CEO) was VICR's largest open-market seller in the past 12 months, with $346.57 million of sales (1.54Mn shares); the latest was on October 2, 2026.
• In transactions other than open-market trades, Vicor insiders acquired 326.59K shares through option exercises and conversions and gave away 97K shares as gifts over the past 12 months.
• Per Business Quant, VICR insiders together hold 8.63Mn shares based on their latest Form 4 filings, down 0.84% from 8.71Mn shares at the end of Q2 2026 and down 16.80% from 10.38Mn shares at the end of Q3 2025.
• By type of ownership, VICR insiders hold 98.06% of their shares directly (8.47Mn shares) and 1.94% indirectly (167.12K shares).
• Business Quant counts 9 insiders with holdings in Vicor stock, among the officers, directors and 10% owners who have filed a Form 4 in the past two years.
• Vicor's three biggest insider holders are Patrizio Vinciarelli (Chairman & CEO, 8.47Mn shares), Estia J. Eichten (Director, 104.83K shares) and Michael McNamara (Corporate VP General MRG. Operations, 18.18K shares), based on their latest Form 4 filings.
• The holding of Patrizio Vinciarelli makes up 98.16% of all shares held by Vicor insiders.
• Institutions held 47.68% of Vicor's outstanding shares in their Q2 2026 13F filings, insiders about 18.79% based on their latest Form 4 filings, and other investors, including the public, the remaining 33.53%.
• In the past year, 18 insiders of Vicor submitted 181 Form 4 filings reporting trades, awards or other transactions.
• This summary of Vicor insider activity covers Form 4 filings through October 5, 2026.