VINCIARELLI PATRIZIO 4

What Happened
Patrizio Vinciarelli, a 10% owner of Vicor Corporation (VICR), sold a total of 50,000 shares on March 25, 2026 in multiple open-market/private-sale transactions, generating approximately $9.18 million in proceeds. The sales were reported in five tranches: 7,350 shares at $181.57 ($1,334,538); 8,411 shares at $182.48 ($1,534,806); 18,960 shares at $183.74 ($3,483,659); 10,000 shares at $185.00 ($1,850,000); and 5,279 shares at $186.00 ($981,894).

Key Details

• Transaction date: March 25, 2026; Form 4 filed March 26, 2026 (filed the next day).
• Reported proceeds: ~ $9,184,897 total.
• Reported per-tranche weighted-average prices and ranges (per footnotes):
  • 7,350 shares WAP $181.57 (trades ranged $181.05–$182.04).
  • 8,411 shares WAP $182.48 (trades ranged $182.05–$183.00).
  • 18,960 shares WAP $183.74 (trades ranged $183.09–$184.00).
  • 10,000 shares WAP $185.00 (single price $185.00).
  • 5,279 shares WAP $186.00 (single price $186.00).
• Ownership note: These shares are held by the reporting person as trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012 (for the benefit of his child).
• Trading plan: At least one sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 3, 2025.
• Shares owned after transaction: Not disclosed in the provided data.
• Filing timeliness: Report appears timely (filed one day after the reported transactions).

Context
This filing reports sales by a 10% owner — large-holder selling can be for many reasons (portfolio rebalancing, tax planning, trust distributions, etc.) and is not the same as executive insider purchases. The presence of a Rule 10b5-1 plan and trust ownership suggests these sales were at least partly pre-arranged and not necessarily an ad hoc signal about the company’s near-term prospects.