Mercury Systems CEO William Ballhaus Exercises Options and Sells Shares

What Happened

• William L. Ballhaus, Chairman, President & CEO of Mercury Systems (MRCY), exercised stock options and sold a portion of the resulting shares. He exercised 244,848 shares (92,850 on Aug 21; 140,650 and 11,348 on Aug 24) at exercise prices of $42.00 and $43.00 for a total exercise cost of about $10,294,964. He sold 173,209 shares in open-market trades (on Aug 21 and Aug 24) for aggregate proceeds of about $15,691,356.

Key Details

• Transaction dates: Aug 21, 2026 and Aug 24, 2026.
• Option exercises: 92,850 @ $42.00 ($3,899,700); 140,650 @ $42.00 ($5,907,300); 11,348 @ $43.00 ($487,964).
• Open-market sales: 64,796 @ $92.40 ($5,987,410); 204 @ $93.51 ($19,076); 105,471 @ $89.47 ($9,436,807); 2,738 @ $90.60 ($248,063). Some reported prices are weighted averages across multiple trades (see footnotes).
• Footnotes: F1 = exercised options that expire Aug 17, 2027; F2 = sales intended solely to cover exercise price, withholding taxes and transaction costs (sell‑to‑cover); F3–F6 = sales executed in multiple trades with reported weighted-average prices.
• Derivative ($0.00) line items reflect the option-exercise entries (conversion/exercise), not additional cash sales.
• Filing timeliness: Form 4 was filed Aug 25, 2026. Transactions on Aug 21 and Aug 24 were reported within the Form 4 reporting window (filed within required business-day timing).
• Shares owned after transaction: not specified in the provided filing excerpt.

Context

• These transactions show an options exercise combined with sales (including sell‑to‑cover), a common way executives realize shares while covering exercise costs and taxes. The option grant(s) exercised were scheduled to expire Aug 17, 2027. Sales were executed in multiple trades; reported prices are weighted averages as noted in the footnotes. This is factual reporting of trades only and does not indicate management intent or future company performance.