Mercury Systems, Inc. (MRCY) has 20 known insider and institutional holders on record. The largest holder is JANA PARTNERS LLC with 4,711,386 shares. Other notable holders include JANA Partners Management, LP and ASLETT MARK.
Over the last 12 months, insiders have made 48 transactions in MRCY stock — 19 buys (valued at RSU Award) and 28 sells (valued at $214.5M). Insider selling has exceeded buying during this period.
MRCY Insider Ownership
Top Holder
JANA PARTNERS LLC
4,711,386 shares
Buys (12 mo)
19
$0.00 value
Sells (12 mo)
28
$214.5M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Jana Partners Llc |
Director |
4,711,386 |
2023-08-22 |
|
| 2 |
Jana Partners Management, Lp |
Other: See Remarks |
4,384,165 |
2026-03-04 |
|
| 3 |
Aslett Mark |
President and CEO |
513,638 |
2023-02-23 |
|
| 4 |
Ballhaus William L |
Chairman, President & CEO |
388,026 |
2025-08-20 |
|
| 5 |
Thibaud Didier M C |
EVP, COO |
247,240 |
2021-08-18 |
|
| 6 |
Haines Gerald M Ii |
EVP, CFO & Treasurer |
210,760 |
2018-02-05 |
|
| 7 |
Ruppert Michael |
EVP, CFO and Treasurer |
203,892 |
2023-02-21 |
|
| 8 |
Farnsworth David E. |
EVP, CFO |
168,898 |
2025-08-20 |
|
| 9 |
Bisson Kevin M |
SVP, CFO and Treasurer |
159,909 |
2014-08-25 |
|
| 10 |
Cambria Christopher C |
EVP, Gen Counsel & Secretary |
137,229 |
2023-09-26 |
|
| 11 |
Wells Charles Roger Iv |
EVP, COO |
98,270 |
2025-02-19 |
|
| 12 |
Skalabrin Mark F |
Sr VP & GM Acs |
94,653 |
2008-06-09 |
|
| 13 |
Hult Robert |
SVP, CFO and Treasurer |
89,645 |
2011-08-19 |
|
| 14 |
Perry Brian E |
EVP, President Processing |
87,913 |
2022-08-22 |
|
| 15 |
Stevison James Mitch |
EVP, President Mission Systems |
86,385 |
2023-10-17 |
|
| 16 |
Vitto Vincent |
Director |
86,342 |
2020-10-30 |
|
| 17 |
Daniels Michael A |
Director |
81,366 |
2021-10-29 |
|
| 18 |
Muellner George K |
Director |
73,838 |
2018-10-26 |
|
| 19 |
Kupinsky Stuart |
EVP, CLO & Corp Sec |
68,010 |
2026-02-19 |
|
| 20 |
Bass James K |
Director |
67,727 |
2017-10-20 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-16 |
Ratner Steven |
EVP, Chro |
RSU Award |
437 |
- |
- |
| 2026-03-04 |
Jana Partners Management, Lp |
Other: See Remarks |
Informative Sell |
100,899 |
$89.68 |
$9.05M |
| 2026-03-03 |
Jana Partners Management, Lp |
Other: See Remarks |
Informative Sell |
168,648 |
$90.12 |
$15.2M |
| 2026-03-02 |
Jana Partners Management, Lp |
Other: See Remarks |
Informative Sell |
182,510 |
$94.05 |
$17.17M |
| 2026-02-25 |
Lance Howard L |
Director |
Informative Sell |
4,832 |
$88.98 |
$429.96K |
| 2026-02-17 |
Munro Douglas |
SVP, CAO |
Informative Sell |
582 |
$83.56 |
$48.63K |
| 2026-02-17 |
Kupinsky Stuart |
EVP, CLO & Corp Sec |
Informative Sell |
2,287 |
$83.56 |
$191.09K |
| 2026-02-09 |
Jana Partners Management, Lp |
Other: See Remarks |
Informative Sell |
400,000 |
$81.00 |
$32.4M |
| 2026-01-15 |
Nearhos Barry R |
Director |
RSU Award |
474 |
- |
- |
| 2025-11-12 |
Munro Douglas |
SVP, CAO |
Informative Sell |
1,329 |
$73.42 |
$97.57K |
| 2025-11-06 |
Jana Partners Management, Lp |
Other: See Remarks |
Informative Sell |
1,000,000 |
$75.45 |
$75.45M |
| 2025-11-07 |
Plunkett Debora A |
Director |
Informative Sell |
1,700 |
$73.99 |
$125.78K |
| 2025-10-22 |
Jana Partners Management, Lp |
Other: See Remarks |
RSU Award |
2,362 |
- |
- |
| 2025-10-22 |
Disbrow Lisa S |
Director |
RSU Award |
2,362 |
- |
- |
| 2025-10-22 |
Plunkett Debora A |
Director |
RSU Award |
2,362 |
- |
- |
| 2025-10-22 |
Nearhos Barry R |
Director |
RSU Award |
2,362 |
- |
- |
| 2025-10-22 |
Carvalho Orlando D |
Director |
RSU Award |
2,362 |
- |
- |
| 2025-10-22 |
Demuro Gerard J |
Director |
RSU Award |
2,362 |
- |
- |
| 2025-10-22 |
Lance Howard L |
Director |
RSU Award |
2,362 |
- |
- |
| 2025-10-22 |
Bua Jean A |
Director |
RSU Award |
2,362 |
- |
- |
| 2025-10-16 |
Nearhos Barry R |
Director |
RSU Award |
487 |
- |
- |
| 2025-09-16 |
Munro Douglas |
VP, CAO |
Informative Sell |
67 |
$73.40 |
$4.92K |
| 2025-08-20 |
Ratner Steven |
EVP, Chro |
Informative Sell |
7,000 |
$63.76 |
$446.31K |
| 2025-08-19 |
Munro Douglas |
VP, CAO |
Informative Sell |
376 |
$64.46 |
$24.24K |
| 2025-08-18 |
Munro Douglas |
VP, CAO |
Informative Sell |
363 |
$66.52 |
$24.15K |
