Mercury Systems (MRCY) CEO William Ballhaus Sells Shares

What Happened

• William L. Ballhaus, Chairman, President & CEO of Mercury Systems (MRCY), disposed of 27,680 shares in two transactions tied to a sell-to-cover program. On 2026-08-17 he sold 3,536 shares at $109.95 each for $388,786, and on 2026-08-18 he sold 24,144 shares at $111.36 each for $2,688,620 — total proceeds ≈ $3,077,406. These were sales (dispositions), not purchases.

Key Details

• Transaction dates and prices:
  • 2026-08-17: 3,536 shares sold @ $109.95 = $388,786 (S)
  • 2026-08-18: 24,144 shares sold @ $111.36 = $2,688,620 (S)
• Total shares sold: 27,680; total proceeds ≈ $3.08M.
• Shares owned after transaction: not specified in the provided summary (see filed Form 4 for post-transaction holdings).
• Footnotes:
  • F1 — Shares sold as part of a sell-to-cover program to satisfy tax withholding upon vesting of stock awards.
  • F2 — Per-share price reflects the allocation for all participants in the sell-to-cover program on the transaction date.
• Filing timeliness: Form 4 filed 2026-08-19 for transactions on 2026-08-17 and 2026-08-18 — appears to be filed within the standard reporting window.

Context

• These sales were part of a sell-to-cover tax withholding related to vested stock awards — a routine administrative disposal (not necessarily a market-timing sell). Such transactions are common when equity awards vest and the company or broker sells shares to cover required taxes.