SEC Form 4 · accession 0001049521-26-000046
MERCURY SYSTEMS INC · MRCY
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
William L Ballhaus
Officer — Chairman, President & CEO · Director
Period of report
Aug 14, 2026
Accepted (ET)
Aug 18, 2026 · 6:16 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001049521
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Aug 14, 2026 | D | 70,287 | $0.00 | D | 304,689 | D | |
| Common Stock | holding | — | — | — | 1,403 | I | 401K Plan | |
| Common Stock | holding | — | — | — | 7,066 | I | By Milestone Road Holdings, LLC |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1Represents shares underlying performance stock awards that were forfeited as a result of below-target performance.