Form4insider filings, from the source

Company · CIK 0001049521 · SIC 3670 — Electronic Components & Accessories · Nasdaq

MERCURY SYSTEMS INC · MRCY

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $37.1M · 11net −$37.1M
$10k$10k$1M$1M$100M$100MbuyssalesMar 28Apr 27May 28Jun 28Jul 29Aug 28Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 21, 2026 SForm 4 →Sep 23, 5:37 pm EDTStuart KupinskyEVP, CLO & Corp Sec1,000$86.52$86,52060,971−1.61%10b5-1
Sep 3, 2026 SForm 4 →Sep 8, 9:46 pm EDTSteven RatnerEVP, CHRO4,000$84.51$338,03019,275−17.2%
Aug 25, 2026 SForm 4 →Aug 27, 4:54 pm EDTWilliam L BallhausChairman, President & CEO, Director160,166$87.72$14,050,340361,822−30.7%
Aug 25, 2026 MForm 4 →Aug 27, 4:54 pm EDTWilliam L BallhausChairman, President & CEO, Director222,152$43.00$9,552,536410,912—
Aug 21, 2026 SForm 4 →Aug 25, 6:00 pm EDTSteven RatnerEVP, CHRO356$91.36$32,5240−100%
Aug 21, 2026 SForm 4 →Aug 25, 5:54 pm EDTStuart KupinskyEVP, CLO & Corp Sec1,000$95.23$95,23056,352−1.74%10b5-1
Aug 21, 2026 SForm 4 →Aug 25, 5:53 pm EDTWilliam L BallhausChairman, President & CEO, Director173,209$90.59$15,691,355299,836−36.6%
Aug 21, 2026 MForm 4 →Aug 25, 5:53 pm EDTWilliam L BallhausChairman, President & CEO, Director244,848$42.05$10,294,964408,045—
Aug 19, 2026 SForm 4 →Aug 21, 4:52 pm EDTDouglas MunroSVP, CAO657$99.87$65,61412,982−4.82%
Aug 19, 2026 SForm 4 →Aug 21, 4:51 pm EDTSteven RatnerEVP, CHRO3,213$99.47$319,58223,275−12.1%
Aug 19, 2026 SForm 4 →Aug 21, 4:50 pm EDTStuart KupinskyEVP, CLO & Corp Sec1,308$100.31$131,20057,352−2.23%
Aug 19, 2026 SForm 4 →Aug 21, 4:49 pm EDTDavid E. FarnsworthEVP, CFO14,767$99.13$1,463,812117,967−11.1%
Aug 19, 2026 SForm 4 →Aug 21, 4:47 pm EDTWilliam L BallhausChairman, President & CEO, Director48,812$99.12$4,838,193228,197−17.6%
Aug 17, 2026 AForm 4/A →Sep 15, 6:12 pm EDTSteven RatnerEVP, CHRO5,187——33,646—
Aug 17, 2026 AForm 4/A →Sep 15, 6:10 pm EDTDouglas MunroSVP, CAO2,882——17,015—
Aug 17, 2026 AForm 4/A →Sep 15, 6:08 pm EDTStuart KupinskyEVP, CLO & Corp Sec5,619——65,457—
Aug 17, 2026 AForm 4/A →Sep 15, 6:07 pm EDTDavid E. FarnsworthEVP, CFO8,212——148,293—
Aug 17, 2026 AForm 4/A →Sep 15, 6:06 pm EDTWilliam L BallhausChairman, President & CEO, Director23,629——324,782—
Aug 17, 2026 SForm 4 →Aug 19, 6:31 pm EDTDouglas MunroSVP, CAO898$110.72$99,43113,639−6.18% amended
Aug 17, 2026 SForm 4 →Aug 19, 6:29 pm EDTSteven RatnerEVP, CHRO3,055$110.86$338,67326,488−10.3% amended
Aug 17, 2026 SForm 4 →Aug 19, 6:26 pm EDTStuart KupinskyEVP, CLO & Corp Sec2,373$110.65$262,57158,660−3.89% amended
Aug 17, 2026 SForm 4 →Aug 19, 6:25 pm EDTDavid E. FarnsworthEVP, CFO8,692$111.14$966,029132,734−6.15% amended
Aug 17, 2026 SForm 4 →Aug 19, 6:24 pm EDTWilliam L BallhausChairman, President & CEO, Director27,680$111.18$3,077,407277,009−9.08% amended
Aug 14, 2026 DForm 4 →Aug 18, 6:26 pm EDTSteven RatnerEVP, CHRO2,695——29,543—
Aug 14, 2026 DForm 4 →Aug 18, 6:23 pm EDTStuart KupinskyEVP, CLO & Corp Sec6,977——61,033—
Aug 14, 2026 DForm 4 →Aug 18, 6:18 pm EDTDavid E. FarnsworthEVP, CFO16,275——141,426—
Aug 14, 2026 DForm 4 →Aug 18, 6:16 pm EDTWilliam L BallhausChairman, President & CEO, Director70,287——304,689—
Jul 16, 2026 AForm 4 →Jul 20, 7:22 am EDTBarry R NearhosDirector170——31,494—

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 25, 2026 MForm 4 →Aug 27, 4:54 pm EDTWilliam L BallhausChairman, President & CEO, Director222,152——0—
Aug 21, 2026 MForm 4 →Aug 25, 5:53 pm EDTWilliam L BallhausChairman, President & CEO, Director244,848——222,152—