Data spanning the past 90 days through February 19, 2026 reveals that Mercury Systems's three principal insider shareholders consist of Director Partners Llc Jana (4.71Mn shares), Director Partners Management, Lp Jana (4.57Mn shares), President And Ceo Mark Aslett (508.86K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Partners Llc Jana | 4,711,386 | 22 Aug, 2023 | |
| Partners Management, Lp Jana | 4,566,675 | 11 Feb, 2026 | |
| Mark Aslett | President And Ceo | 508,858 | 23 Feb, 2023 |
| William L Ballhaus | Chairman And President & Ceo | 375,184 | 20 Aug, 2025 |
| Didier M C Thibaud | Evp And Coo | 245,917 | 18 Aug, 2021 |
| Michael Ruppert | Evp And Cfo And Treasurer | 202,553 | 21 Feb, 2023 |
| David E. Farnsworth | Evp And Cfo | 161,326 | 20 Aug, 2025 |
| Christopher C Cambria | Evp And Gen Counsel & Secretary | 135,721 | 26 Sep, 2023 |
| Charles Roger Iv Wells | Evp And Coo | 96,602 | 19 Feb, 2025 |
| Brian E Perry | Evp And President Processing | 87,913 | 22 Aug, 2022 |
| James Mitch Stevison | Evp And President Mission Systems | 86,859 | 17 Oct, 2023 |
| Michael A Daniels | 81,366 | 29 Oct, 2021 | |
| Stuart Kupinsky | Evp And Clo & Corp Sec | 70,297 | 20 Aug, 2025 |
| James Bass | 67,634 | 29 Oct, 2021 | |
| Thomas Huber | Evp Chief Transformation Offic | 66,489 | 23 Feb, 2023 |
| Allen Couture | Evp And Execution Excellence | 65,727 | 19 Oct, 2023 |
| Orlando D Carvalho | 59,448 | 24 Oct, 2025 | |
| Christine Fox Harbison | Evp And Chief Growth Officer | 40,436 | 21 Aug, 2023 |
| Steven Ratner | Evp And Chro | 33,801 | 25 Aug, 2025 |
| Michelle M Mccarthy | Svp And Cao | 32,724 | 21 Dec, 2023 |
| Stephanie Georges | Evp And Cco | 32,259 | 21 Aug, 2024 |
| Howard L Lance | 32,104 | 24 Oct, 2025 | |
| Lisa S Disbrow | 31,236 | 24 Oct, 2025 | |
| Barry R Nearhos | 31,079 | 20 Jan, 2026 | |
| Mary L Krakauer | 19,360 | 28 Oct, 2022 | |
| Gerard J Demuro | 17,481 | 24 Oct, 2025 | |
| Debora A Plunkett | 16,833 | 10 Nov, 2025 | |
| Roger A Krone | 15,311 | 25 Oct, 2024 | |
| Douglas Munro | Svp And Cao | 14,678 | 13 Nov, 2025 |
| William K Obrien | 13,100 | 28 Oct, 2022 | |
| Jean A Bua | 7,815 | 24 Oct, 2025 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 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 | - | - | 14,678 | D | |||
| 12 Nov, 2025 | Douglas Munro | Common Stock | D | 1,329 | $73.42 | 14,678 | D | S |
| 07 Nov, 2025 | Debora A Plunkett | Common Stock | D | 1,700 | $73.99 | 16,833 | 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 |
| 22 Oct, 2025 | Jean A Bua | Common Stock | A | 2,362 | $0.00 | 7,815 | D | A |
| 22 Oct, 2025 | Howard L Lance | Common Stock | A | 2,362 | $0.00 | 32,104 | D | A |
| 22 Oct, 2025 | Gerard J Demuro | Common Stock | A | 2,362 | $0.00 | 17,481 | D | A |
| 22 Oct, 2025 | Orlando D Carvalho | Common Stock | A | 2,362 | $0.00 | 59,448 | D | A |
| 22 Oct, 2025 | Barry R Nearhos | Common Stock | A | 2,362 | $0.00 | 30,605 | 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 | - | - | 31,236 | D | |||
| 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 |
| 16 Oct, 2025 | Barry R Nearhos | Common Stock | A | 487 | $0.00 | 28,243 | D | A |
| 16 Sep, 2025 | Douglas Munro | Common Stock | D | 67 | $73.40 | 16,007 | D | S |
| 20 Aug, 2025 | Steven Ratner | Common Stock | D | 7,000 | $63.76 | 33,801 | D | S |
| 19 Aug, 2025 | Stuart Kupinsky | Common Stock | D | 1,220 | $64.46 | 70,297 | D | S |
| 19 Aug, 2025 | William L Ballhaus | Common Stock | D | 13,050 | $64.46 | 374,976 | D | S |