KUPINSKY STUART 4

What Happened
Stuart Kupinsky, EVP, Chief Legal Officer and Corporate Secretary of Mercury Systems (MRCY), sold 2,287 shares on February 17, 2026 at $83.56 per share for proceeds of $191,091. The sale was reported on a Form 4 filed Feb 19, 2026 and is listed as a sale (S) performed under a sell‑to‑cover program to satisfy tax withholding obligations upon the vesting of stock awards.

Key Details

• Transaction date: 2026-02-17; per-share price reported: $83.56 (footnote indicates this price is attributed to aggregated sales for all participants on that date).
• Shares sold: 2,287; gross proceeds: $191,091.
• Reason: Footnote states the sale represents shares sold to satisfy tax withholding on vested awards (sell‑to‑cover).
• Filing: Form 4 filed 2026-02-19 — appears to be timely (filed within standard Form 4 reporting window).
• Shares owned after the transaction: not specified in the provided filing data.

Context
Sell‑to‑cover transactions are common when restricted stock or other awards vest and shares are sold to cover tax withholding; such sales are routine and do not necessarily indicate management sentiment about the company’s stock. This transaction is a sale (routine tax-related), not a purchase or exercise indicating additional personal investment.