CRILLY SEAN 4

What Happened Sean Crilly, Corporate Vice President — Engineering, Power Systems at Vicor Corporation, reported an open-market sale of 6,000 shares on February 27, 2026. The shares were sold at $197.73 per share for a reported total of $1,186,391. This filing reports a sale (disposition) rather than a purchase; sales are commonly routine and do not by themselves indicate a change in the insider's view of the company.

Key Details

• Transaction date: 2026-02-27; sale type: open-market or private sale (S).
• Price per share: $197.73; shares sold: 6,000; reported total value: $1,186,391.
• Shares owned after the transaction: not specified in the summary provided.
• Footnote: the filing notes inclusion of 197 shares acquired under the Vicor Corporation 2017 Employee Stock Purchase Plan on February 27, 2026 — this likely relates to holdings reported on the form.
• Filing date: 2026-03-02 — the Form 4 was filed within the required reporting window (timely).

Context

• This report documents a sale of existing shares (code S). Unlike purchases, sales are often executed for personal or tax reasons and do not necessarily signal the insider’s assessment of the company’s prospects.
• The small ESPP acquisition noted in the footnote represents an employee purchase and is separate from the reported sale.