SEC Form 4 · Updated Daily
MRCY
— MERCURY SYSTEMS, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| JANA PARTNERS LLC | 10%+ Owner | 4,711,386 | 2023-08-18 | P |
| JANA Partners Management, LP | 10%+ Owner · Director | 4,384,165 | 2026-03-02 | S |
| BERTELLI JAMES R | Director | 692,048 | 2008-07-31 | M |
| ASLETT MARK | Director · Officer | 513,638 | 2023-02-21 | S |
| Ballhaus William L | Director · Officer | 324,782.325 | 2026-08-17 | A |
| THIBAUD DIDIER M C | Officer | 260,810 | 2021-08-16 | F |
| HAINES GERALD M II | Director | 210,760 | 2018-02-01 | S |
| Ruppert Michael | Director | 203,892 | 2023-02-16 | S |
| BISSON KEVIN M | Officer | 159,909 | 2014-08-21 | S |
| Farnsworth David E. | Officer | 148,293 | 2026-08-17 | A |
| CAMBRIA CHRISTOPHER C | Officer | 135,721 | 2023-09-06 | S |
| Wells Charles Roger IV | Officer | 98,270 | 2025-02-15 | D |
| SKALABRIN MARK F | Officer | 96,253 | 2008-06-16 | M |
| Perry Brian E | Officer | 89,650 | 2022-08-18 | S |
| HULT ROBERT | Officer | 89,645 | 2011-08-17 | S |
| Stevison James Mitch | Officer | 86,385 | 2023-10-16 | S |
| Vitto Vincent | Director | 86,342 | 2020-10-28 | A |
| Daniels Michael A | Director | 81,366 | 2021-10-27 | A |
| Muellner George K | Director | 73,838 | 2018-10-24 | A |
| CHAMILLARD GEORGE W | Director | 72,703 | 2014-08-08 | M |
| Bass James | Director | 67,634 | 2021-10-27 | A |
| Huber Thomas | Officer | 66,806 | 2023-02-21 | S |
| Couture Allen | Officer | 65,222 | 2023-10-18 | S |
| KUPINSKY STUART | Officer | 59,971 | 2026-10-21 | S |
| Carvalho Orlando D | Director | 52,448 | 2026-05-12 | S |
| Harbison Christine Fox | Officer | 52,220 | 2023-08-17 | A |
| STEELE LEE C | Director | 45,203 | 2012-11-06 | P |
| SALINE CRAIG A | Officer | 42,328 | 2010-08-18 | S |
| Speicher Charles A | Officer | 35,966 | 2017-08-17 | F |
| Ratner Steven | Officer | 33,646 | 2026-08-17 | A |
| Georges Stephanie | Officer | 33,599 | 2024-08-16 | D |
| McCarthy Michelle M | Officer | 32,724 | 2023-12-19 | S |
| WISHNER RICHARD P | Director | 31,733 | 2010-02-10 | S |
| Nearhos Barry R | Director | 31,729 | 2026-10-15 | A |
| DISBROW LISA S | Director | 31,236 | 2025-10-22 | A |
| MULLIN SHERMAN N | Director | 26,010 | 2008-09-11 | M |
| Krakauer Mary L | Director | 19,360 | 2022-10-26 | A |
| NEWMAN MARK S | Director | 18,956 | 2017-10-18 | A |
| Radford Joel B | Officer | 18,917 | 2008-06-05 | F |
| FLOOD DOUGLAS | Officer | 18,425 | 2008-09-11 | F |
| JOHNSEN RUSSELL | Director | 18,333 | 2009-10-21 | A |
| VAN ADZIN ALEX A | Officer | 18,000 | 2009-08-17 | A |
| DEMURO GERARD J | Director | 17,481 | 2025-10-22 | A |
| Munro Douglas | Officer | 17,015 | 2026-08-17 | A |
| Plunkett Debora A | Director | 16,833 | 2025-11-07 | S |
| KRONE ROGER A | Director | 15,311 | 2024-10-23 | A |
| BARROWS CRAIG | Officer | 14,357 | 2007-06-05 | A |
| ISENSTEIN BARRY S | Officer | 14,334 | 2006-02-20 | A |
| BRAVERMAN ALEX | Officer | 14,030 | 2007-06-05 | A |
| OBRIEN WILLIAM K | Director | 13,100 | 2022-10-26 | A |
| LUND CRAIG | Officer | 12,572 | 2008-08-12 | F |
| Lima Marcelo G | Director | 12,261 | 2008-08-13 | S |
| BELLE ISLE ALBERT P | Director | 10,333 | 2009-10-21 | A |
| HARTNETT JOSEPH M | Officer | 10,276 | 2006-09-11 | A |
| Ryan Terrence M | Officer | 10,000 | 2008-01-30 | P |
| BUA JEAN A | Officer | 7,815 | 2025-10-22 | A |
| LANCE HOWARD L | Director | 1,250 | 2026-05-26 | S |
| Ostfeld Scott | Director | 0 | 2023-07-10 | — |
| Noone Karl | Officer | 0 | 2008-05-27 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-10-21 | KUPINSKY STUART | Open-market sale | 1,000 | $76.00 | 59,971 |
| 2026-10-15 | Nearhos Barry R | Grant / award | 235 | $0.00 | 31,729 |
| 2026-09-21 | KUPINSKY STUART | Open-market sale | 1,000 | $86.52 | 60,971 |
| 2026-09-03 | Ratner Steven | Open-market sale | 4,000 | $84.51 | 19,275 |
| 2026-08-26 | Ballhaus William L | Option exercise (derivative) | 68,476 | $0.00 | 0 |
| 2026-08-26 | Ballhaus William L | Open-market sale | 10,814 | $89.74 | 361,822.325 |
| 2026-08-26 | Ballhaus William L | Open-market sale | 38,276 | $88.91 | 372,636.325 |
| 2026-08-26 | Ballhaus William L | Option exercise | 68,476 | $43.00 | 410,912.325 |
| 2026-08-25 | Ballhaus William L | Option exercise (derivative) | 153,676 | $0.00 | 68,476 |
| 2026-08-25 | Ballhaus William L | Open-market sale | 3,448 | $87.99 | 342,436.325 |
| 2026-08-25 | Ballhaus William L | Open-market sale | 107,628 | $87.09 | 345,884.325 |
| 2026-08-25 | Ballhaus William L | Option exercise | 153,676 | $43.00 | 453,512.325 |
| 2026-08-24 | Ballhaus William L | Option exercise (derivative) | 11,348 | $0.00 | 222,152 |
| 2026-08-24 | Ballhaus William L | Option exercise (derivative) | 140,650 | $0.00 | 0 |
| 2026-08-24 | Ballhaus William L | Open-market sale | 2,738 | $90.60 | 299,836.325 |
| 2026-08-24 | Ballhaus William L | Open-market sale | 105,471 | $89.47 | 302,574.325 |
| 2026-08-24 | Ballhaus William L | Option exercise | 11,348 | $43.00 | 408,045.325 |
| 2026-08-24 | Ballhaus William L | Option exercise | 140,650 | $42.00 | 396,697.325 |
| 2026-08-21 | Ballhaus William L | Option exercise (derivative) | 92,850 | $0.00 | 140,650 |
| 2026-08-21 | Ballhaus William L | Open-market sale | 204 | $93.51 | 256,047.325 |
| 2026-08-21 | Ballhaus William L | Open-market sale | 64,796 | $92.40 | 256,251.325 |
| 2026-08-21 | Ballhaus William L | Option exercise | 92,850 | $42.00 | 321,047.325 |
| 2026-08-21 | KUPINSKY STUART | Open-market sale | 1,000 | $95.23 | 56,352 |
| 2026-08-21 | Ratner Steven | Open-market sale | 356 | $91.36 | 0 |
| 2026-08-20 | Ballhaus William L | Open-market sale | 22,010 | $97.67 | 228,197.325 |
| 2026-08-20 | Farnsworth David E. | Open-market sale | 6,612 | $97.67 | 117,967 |
| 2026-08-20 | Ratner Steven | Open-market sale | 1,026 | $97.67 | 23,275 |
| 2026-08-20 | Munro Douglas | Open-market sale | 109 | $97.67 | 12,982 |
| 2026-08-19 | Ballhaus William L | Open-market sale | 26,802 | $100.31 | 250,207.325 |
| 2026-08-19 | Farnsworth David E. | Open-market sale | 8,155 | $100.31 | 124,579 |
| 2026-08-19 | KUPINSKY STUART | Open-market sale | 1,308 | $100.31 | 57,352 |
| 2026-08-19 | Ratner Steven | Open-market sale | 2,187 | $100.31 | 24,301 |
| 2026-08-19 | Munro Douglas | Open-market sale | 548 | $100.31 | 13,091 |
| 2026-08-18 | Ballhaus William L | Open-market sale | 24,144 | $111.36 | 277,009.325 |
| 2026-08-18 | Farnsworth David E. | Open-market sale | 7,347 | $111.36 | 132,734 |
| 2026-08-18 | KUPINSKY STUART | Open-market sale | 1,178 | $111.36 | 58,660 |
| 2026-08-18 | Ratner Steven | Open-market sale | 1,971 | $111.36 | 26,488 |
| 2026-08-18 | Munro Douglas | Open-market sale | 494 | $111.36 | 13,639 |
| 2026-08-17 | Ballhaus William L | Grant / award | 23,629 | $0.00 | 324,782.325 |
| 2026-08-17 | Farnsworth David E. | Grant / award | 8,212 | $0.00 | 148,293 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.