MERCURY SYSTEMS (MRCY) CEO William Ballhaus Sells Shares

What Happened

• William L. Ballhaus, Chairman, President & CEO and a director of Mercury Systems (MRCY), sold a total of 48,812 shares via company sell-to-cover transactions tied to the vesting of stock awards. The dispositions consisted of 26,802 shares on 2026-08-19 at $100.31/share ($2,688,401) and 22,010 shares on 2026-08-20 at $97.67/share ($2,149,792), totaling about $4.84 million. These were sales (not purchases) executed to satisfy tax withholding obligations, a common administrative step when restricted stock or other awards vest.

Key Details

• Transaction dates & prices:
  • 2026-08-19: sold 26,802 shares at $100.31 — $2,688,401 (F2: per-share price attribution)
  • 2026-08-20: sold 22,010 shares at $97.67 — $2,149,792 (F2)
• Total shares sold: 48,812; total proceeds: ~$4,838,193.
• Footnotes: F1 = sales part of a sell-to-cover program to satisfy tax withholding on vesting; F2 = per-share price attributed to sales for all participants under the program.
• Shares owned after the transactions: not specified in the provided filing summary.
• Filing: Form 4 filed 2026-08-21 reporting transactions on 2026-08-19–08-20 (filed within the normal reporting window).

Context

• These were sell-to-cover sales tied to tax withholding when stock awards vested — routine administrative sales that do not necessarily indicate a change in the insider’s view of the company. Sales to cover taxes are common and distinct from open-market discretionary sell orders.