MRCY · Insider Trading
Mercury Systems Inc.
Every open-market purchase and sale reported by MRCY officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-26 | Stuart Kupinsky | EVP, CLO & Corp Sec | Sell | −1,000 | −$76.00K |
| 2026-10-16 | Barry R Nearhos | Director | A | +235 | — |
| 2026-09-23 | Stuart Kupinsky | EVP, CLO & Corp Sec | Sell | −1,000 | −$86.52K |
| 2026-09-15 | David E. Farnsworth | EVP, CFO | A | +8,212 | — |
| 2026-09-15 | Steven Ratner | EVP, CHRO | A | +5,187 | — |
| 2026-09-15 | Stuart Kupinsky | EVP, CLO & Corp Sec | A | +5,619 | — |
| 2026-09-15 | Douglas Munro | SVP, CAO | A | +2,882 | — |
| 2026-09-15 | William L Ballhaus | Chairman, President & CEO | A | +23,629 | — |
| 2026-09-08 | Steven Ratner | EVP, CHRO | Sell | −4,000 | −$338.03K |
| 2026-08-27 | William L Ballhaus | Chairman, President & CEO | MIXED | +61,986 | −$4.50M |
| 2026-08-25 | Steven Ratner | EVP, CHRO | Sell | −356 | −$32.52K |
| 2026-08-25 | Stuart Kupinsky | EVP, CLO & Corp Sec | Sell | −1,000 | −$95.23K |
| 2026-08-25 | William L Ballhaus | Chairman, President & CEO | MIXED | +71,639 | −$5.40M |
| 2026-08-21 | Douglas Munro | SVP, CAO | Sell | −657 | −$65.61K |
| 2026-08-21 | Steven Ratner | EVP, CHRO | Sell | −3,213 | −$319.58K |
| 2026-08-21 | Stuart Kupinsky | EVP, CLO & Corp Sec | Sell | −1,308 | −$131.20K |
| 2026-08-21 | William L Ballhaus | Chairman, President & CEO | Sell | −48,812 | −$4.84M |
| 2026-08-21 | David E. Farnsworth | EVP, CFO | Sell | −14,767 | −$1.46M |
| 2026-08-19 | Stuart Kupinsky | EVP, CLO & Corp Sec | Sell | −2,373 | −$262.57K |
| 2026-08-19 | William L Ballhaus | Chairman, President & CEO | Sell | −27,680 | −$3.08M |
| 2026-08-19 | David E. Farnsworth | EVP, CFO | Sell | −8,692 | −$966.03K |
| 2026-08-19 | Douglas Munro | SVP, CAO | Sell | −898 | −$99.43K |
| 2026-08-19 | Steven Ratner | EVP, CHRO | Sell | −3,055 | −$338.67K |
| 2026-08-18 | Steven Ratner | EVP, CHRO | D | −2,695 | — |
| 2026-08-18 | Stuart Kupinsky | EVP, CLO & Corp Sec | D | −6,977 | — |
| 2026-08-18 | William L Ballhaus | Chairman, President & CEO | D | −70,287 | — |
| 2026-08-18 | David E. Farnsworth | EVP, CFO | D | −16,275 | — |
| 2026-07-20 | Barry R Nearhos | Director | A | +170 | — |
| 2026-05-27 | Howard L Lance | Director | Sell | −9,250 | −$922.74K |
| 2026-05-13 | Orlando D Carvalho | Director | Sell | −7,000 | −$625.53K |
| 2026-05-12 | Steven Ratner | EVP, CHRO | Sell | −2,000 | −$184.92K |
| 2026-04-17 | David E. Farnsworth | EVP, CFO | Sell | −3,625 | −$307.66K |
| 2026-04-17 | Barry R Nearhos | Director | A | +245 | — |
| 2026-03-18 | Steven Ratner | EVP, CHRO | A | +437 | — |
| 2026-03-04 | JANA Partners Management, LP | Director | Sell | −452,057 | −$41.41M |
| 2026-02-27 | Howard L Lance | Director | Sell | −4,832 | −$429.96K |
| 2026-02-19 | Stuart Kupinsky | EVP, CLO & Corp Sec | Sell | −2,287 | −$191.09K |
| 2026-02-19 | Douglas Munro | SVP, CAO | Sell | −582 | −$48.63K |
| 2026-02-11 | JANA Partners Management, LP | Director | Sell | −400,000 | −$32.40M |
| 2026-01-20 | Barry R Nearhos | Director | A | +474 | — |
| 2025-11-13 | Douglas Munro | SVP, CAO | Sell | −1,329 | −$97.57K |
| 2025-11-10 | Debora A Plunkett | Director | Sell | −1,700 | −$125.78K |
| 2025-11-10 | JANA Partners Management, LP | Director | Sell | −1,000,000 | −$75.45M |
| 2025-10-24 | JANA Partners Management, LP | Director | A | +2,362 | — |
| 2025-10-24 | Orlando D Carvalho | Director | A | +2,362 | — |
| 2025-10-24 | Barry R Nearhos | Director | A | +2,362 | — |
| 2025-10-24 | Gerard J Demuro | Director | A | +2,362 | — |
| 2025-10-24 | Debora A Plunkett | Director | A | +2,362 | — |
| 2025-10-24 | Jean A Bua | Director | A | +2,362 | — |
| 2025-10-24 | Lisa S Disbrow | Director | A | +2,362 | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| JANA Partners Management, LP | Director | 4,114,618 | $327.98M |
| William L Ballhaus | Chairman, President & CEO | 326,185 | $26.00M |
| David E. Farnsworth | EVP, CFO | 149,809 | $11.94M |
| Charles Roger Wells IV | EVP, COO | 97,226 | $7.75M |
| Stuart Kupinsky | EVP, CLO & Corp Sec | 62,252 | $4.96M |
| Orlando D Carvalho | Director | 52,448 | $4.18M |
| Barry R Nearhos | Director | 35,229 | $2.81M |
| Steven Ratner | EVP, CHRO | 34,002 | $2.71M |
| Lisa S Disbrow | Director | 31,236 | $2.49M |
| Howard L Lance | Director | 28,522 | $2.27M |
| Gerard J Demuro | Director | 17,481 | $1.39M |
| Douglas Munro | SVP, CAO | 17,374 | $1.38M |
| Debora A Plunkett | Director | 16,833 | $1.34M |
| Jean A Bua | Director | 7,815 | $622.93K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the MRCY quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.