Vicor Corp (VICR) has 18 different people on file with open-market Form 4 activity over the trailing 365 days, measured through November 2nd, 2026. The most active of them is Patrizio Vinciarelli, the company's CEO. Across the full roster, the open-market dollar total comes to $412.7 million, and every dollar of it sits on the sell side.

Vinciarelli himself accounts for the bulk of that figure. His record in the window is 698 sale transactions and no purchases, totaling $346,570,360 in disposals. For scale, Vicor last traded at $159.07 per share against a market capitalization of $7,340,858,368.

Working down the roster in order, Claudio Tuozzolo, a Director, filed 21 sales and no purchases, for $11,874,093. Michael McNamara, also a Director, filed 7 sales and no purchases, for $7,545,437. James F Schmidt, listed as CFO, filed 51 sales and no purchases, for $7,511,865.

Philip D Davies, a Director, filed 87 sales and no purchases, for $7,173,230. Estia J Eichten, a Director, filed 12 sales and no purchases, for $6,841,137. Alvaro Doyle, filed under the Other category, recorded 9 sales and no purchases, for $4,606,207.

Andrew D'Amico, listed as CFO, filed 42 sales and no purchases, for $4,503,725. Quentin A. Fendelet, in the Other category, filed 19 sales and no purchases, for $3,730,741. Sean Crilly, also in the Other category, filed 5 sales and no purchases, for $2,188,405.

Two points on how these numbers are built. Only Form 4 transaction codes P and S are counted here, so awards, tax withholding and option exercises are excluded from the totals. And the roster above names the ten filers detailed in our tables, out of the 18 people on file in the window.

A roster like this tells you who filed and what code they filed under. It does not tell you why. A director who files once in a year is not making a conviction statement either way, and a long-tenured holder selling in size may be diversifying, funding a tax bill, meeting a trust obligation or selling under a plan adopted well before the trades printed. Concentration matters too: one filer here represents the clear majority of the dollar total, so the headline figure is not a story about eighteen people acting in concert. The useful read is the pattern, not the motive, and in this window the pattern is one-directional.

Equally, the absence of purchases is not itself a forecast. Insiders at companies where most compensation arrives as equity often have little reason to buy on the open market, because they already hold a great deal of stock. What the window does establish is that across 18 filers and roughly a year of activity, no one on this list added shares at market prices.

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

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