Eighteen different people have filed open-market transactions at Vicor Corp (VICR) over the trailing 365 days. The most active of them is Patrizio Vinciarelli, the company's CEO, whose most recent dated transaction on file is October 2nd, 2026. Across the whole roster, the window adds up to $424.0 million in open-market dollars, and all of it sits on the sell side.

Vinciarelli's own line is the largest on the file by dollars. He records 698 open-market sales worth $346,570,360 and no open-market purchases during the window. That single name accounts for the bulk of the activity logged at the company over the period.

Claudio Tuozzolo, a Director, is next on the roster with 28 sales totaling $13,717,507 and no buys. James F Schmidt, listed as CFO, shows 61 sales worth $8,705,355, also with no open-market purchases on file.

Philip D Davies, a Director, records 77 sales totaling $8,061,360, the highest sale count on the roster after the CEO. Michael McNamara, also a Director, files far less often but at larger size: 7 sales worth $7,545,437.

Estia J Eichten, a Director, shows 14 sales worth $7,347,898. Andrew D'Amico, listed as CFO, records 59 sales totaling $6,030,155, a pattern of many smaller tickets rather than a few block trades.

Three names carry the "Other" designation. Alvaro Doyle logs 11 sales worth $5,298,475. Quentin A. Fendelet logs 24 sales worth $5,193,131. Sean Crilly logs 6 sales worth $3,263,725. None of the three shows an open-market purchase in the window.

For scale, Vicor last traded at $191.5 and carries a market capitalization of $8,829,438,976. The company is classified under Electronic Components, NEC. Only Form 4 codes P and S are counted here, so awards, tax withholding and option exercises are excluded from every figure above.

A roster is a map of who files, not a verdict on what they think. A director who files once in a year is not making a conviction statement, and a large holder selling repeatedly may simply be diversifying, meeting a scheduled plan, or funding something unrelated to the business. Concentrated sale counts can also reflect how a single decision gets broken into many executions rather than many separate decisions. The useful read is coverage and pattern: how many people are active, how often, and whether anyone sits on the other side of the ledger.

Sources: SEC Form 4 filings via EDGAR, reviewed by InsiderBuying.com.

Track every Form 4 filed at VICOR CORP (VICR) → insiderbuying.com/companies/VICR