As of April 11, 2026, Mercury Systems's top three insider holders are Partners Management, Lp Jana (Director, 6.55Mn shares), Partners Management, Lp Jana (Director, 5.97Mn shares), Partners Llc Jana (Director, 4.71Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Partners Management, Lp Jana | - | 0 | 6,553,120 | 13 Feb, 2024 |
| Partners Management, Lp Jana | - | 0 | 5,966,675 | 24 Oct, 2025 |
| Partners Llc Jana | - | 0 | 4,711,386 | 22 Aug, 2023 |
| Partners Management, Lp Jana | - | 0 | 4,566,675 | 11 Feb, 2026 |
| Partners Management, Lp Jana | - | 0 | 4,384,165 | 04 Mar, 2026 |
| Partners Management, Lp Jana | - | 0 | 4,114,618 | 04 Mar, 2026 |
| Mark Aslett | President And Ceo | 508,858 | 0 | 23 Feb, 2023 |
| William L Ballhaus | Chairman, President Ceo | 374,976 | 0 | 20 Aug, 2025 |
| Didier M C Thibaud | Evp, Coo | 245,917 | 0 | 18 Aug, 2021 |
| Michael Ruppert | Evp, Cfo And Treasurer | 202,553 | 0 | 21 Feb, 2023 |
| David E. Farnsworth | Evp, Cfo | 161,326 | 0 | 20 Aug, 2025 |
| Christopher C Cambria | Evp, Gen Counsel Secretary | 135,721 | 0 | 26 Sep, 2023 |
| Charles Roger Iv Wells | Evp, Coo | 95,928 | 0 | 19 Feb, 2025 |
| Brian E Perry | Evp, President Processing | 87,913 | 0 | 22 Aug, 2022 |
| James Mitch Stevison | Evp, President Mission Systems | 86,385 | 0 | 17 Oct, 2023 |
| Michael A Daniels | - | 81,366 | 0 | 29 Oct, 2021 |
| Stuart Kupinsky | Evp, Clo Corp Sec | 68,010 | 0 | 19 Feb, 2026 |
| James Bass | - | 67,634 | 0 | 29 Oct, 2021 |
| Thomas Huber | Evp Chief Transformation Offic | 66,489 | 0 | 23 Feb, 2023 |
| Allen Couture | Evp, Execution Excellence | 65,222 | 0 | 19 Oct, 2023 |
| Orlando D Carvalho | - | 59,448 | 0 | 24 Oct, 2025 |
| Christine Fox Harbison | Evp And Chief Growth Officer | 52,220 | 0 | 21 Aug, 2023 |
| Steven Ratner | Evp, Chro | 34,238 | 0 | 18 Mar, 2026 |
| Michelle M Mccarthy | Svp, Cao | 32,724 | 0 | 21 Dec, 2023 |
| Stephanie Georges | Evp, Cco | 32,259 | 0 | 21 Aug, 2024 |
| Lisa S Disbrow | - | 31,236 | 0 | 24 Oct, 2025 |
| Barry R Nearhos | - | 31,079 | 0 | 20 Jan, 2026 |
| Howard L Lance | - | 27,272 | 0 | 27 Feb, 2026 |
| Mary L Krakauer | - | 19,360 | 0 | 28 Oct, 2022 |
| Gerard J Demuro | - | 17,481 | 0 | 24 Oct, 2025 |
| Debora A Plunkett | - | 16,833 | 0 | 10 Nov, 2025 |
| Roger A Krone | - | 15,311 | 0 | 25 Oct, 2024 |
| Roger A Krone | - | 0 | 15,000 | 22 Aug, 2023 |
| Douglas Munro | Svp, Cao | 14,328 | 0 | 19 Feb, 2026 |
| William K Obrien | - | 13,100 | 0 | 28 Oct, 2022 |
| Howard L Lance | - | 0 | 9,250 | 22 Aug, 2023 |
| Jean A Bua | - | 7,815 | 0 | 24 Oct, 2025 |
| William L Ballhaus | Chairman, President Ceo | 0 | 7,066 | 13 Feb, 2024 |
| Barry R Nearhos | - | 0 | 3,500 | 12 Feb, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 16 Mar, 2026 | Steven Ratner | Common Stock | A | 437 | $0.00 | 34,238 | D | A |
| 02 Mar, 2026 | Partners Management, Lp Jana | Common Stock, par value $0.01 per share (Common Stock) | D | 182,510 | $94.05 | 4,384,165 | I | S |
| 03 Mar, 2026 | Partners Management, Lp Jana | Common Stock | D | 168,648 | $90.12 | 4,215,517 | I | S |
| 04 Mar, 2026 | Partners Management, Lp Jana | Common Stock | D | 100,899 | $89.68 | 4,114,618 | I | S |
| 25 Feb, 2026 | Howard L Lance | Common Stock | D | 4,832 | $88.98 | 27,272 | D | S |
| 17 Feb, 2026 | Douglas Munro | Common Stock | D | 582 | $83.56 | 14,328 | D | S |
| 17 Feb, 2026 | Stuart Kupinsky | Common Stock | D | 2,287 | $83.56 | 68,010 | D | S |
| 09 Feb, 2026 | Partners Management, Lp Jana | Common Stock, par value $0.01 per share | D | 400,000 | $81.00 | 4,566,675 | I | S |
| 15 Jan, 2026 | Barry R Nearhos | Common Stock | A | 474 | $0.00 | 31,079 | D | A |
| 12 Nov, 2025 | Douglas Munro | Common Stock | D | 1,329 | $73.42 | 14,678 | D | S |
| 06 Nov, 2025 | Partners Management, Lp Jana | Common Stock, par value $0.01 per share | D | 1,000,000 | $75.45 | 4,966,675 | I | S |
| 07 Nov, 2025 | Debora A Plunkett | Common Stock | D | 1,700 | $73.99 | 16,833 | D | S |
| 22 Oct, 2025 | Howard L Lance | Common Stock | A | 2,362 | $0.00 | 32,104 | D | A |
| 22 Oct, 2025 | Debora A Plunkett | Common Stock | A | 2,362 | $0.00 | 18,533 | D | A |
| 22 Oct, 2025 | Lisa S Disbrow | Common Stock | A | 2,362 | $0.00 | 31,236 | D | A |
| 22 Oct, 2025 | Partners Management, Lp Jana | Common Stock, par value $0.01 per share | A | 2,362 | $0.00 | 5,966,675 | I | A |
| 22 Oct, 2025 | Barry R Nearhos | Common Stock | A | 2,362 | $0.00 | 30,605 | D | A |
| 22 Oct, 2025 | Jean A Bua | Common Stock | A | 2,362 | $0.00 | 7,815 | D | A |
| 22 Oct, 2025 | Orlando D Carvalho | Common Stock | A | 2,362 | $0.00 | 59,448 | D | A |
| 22 Oct, 2025 | Gerard J Demuro | Common Stock | A | 2,362 | $0.00 | 17,481 | D | A |