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 Management, LP | 10%+ Owner · Director | 4,114,618 | 2026-03-04 | S |
| Ballhaus William L | Director · Officer | 361,822.325 | 2026-08-26 | S |
| Farnsworth David E. | Officer | 117,967 | 2026-08-20 | S |
| KUPINSKY STUART | Officer | 56,352 | 2026-08-21 | S |
| Carvalho Orlando D | Director | 52,448 | 2026-05-12 | S |
| Nearhos Barry R | Director | 31,494 | 2026-07-16 | A |
| DISBROW LISA S | Director | 31,236 | 2025-10-22 | A |
| Ratner Steven | Officer | 19,275 | 2026-09-03 | S |
| DEMURO GERARD J | Director | 17,481 | 2025-10-22 | A |
| Plunkett Debora A | Director | 16,833 | 2025-11-07 | S |
| Munro Douglas | Officer | 12,982 | 2026-08-20 | S |
| BUA JEAN A | Director | 7,815 | 2025-10-22 | A |
| LANCE HOWARD L | Director | 0 | 2026-05-26 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 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 | Open-market sale | 3,536 | $109.95 | 301,153.325 |
| 2026-08-17 | Farnsworth David E. | Open-market sale | 1,345 | $109.95 | 140,081 |
| 2026-08-17 | KUPINSKY STUART | Open-market sale | 1,195 | $109.95 | 59,838 |
| 2026-08-17 | Ratner Steven | Open-market sale | 1,084 | $109.95 | 28,459 |
| 2026-08-17 | Munro Douglas | Open-market sale | 404 | $109.95 | 14,133 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.