Mercury Systems, Inc. (MRCY) Insider Trading
Over the last 3 months, MRCY insiders made 0 open-market buys and 29 sales, a net sale of -$41.4M (SEC Form 4). Over the last 6 months, 268 institutions increased and 256 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
29
Net (3m)
-$41.4M
Insider trades by month Buys Sells
Nov
Feb
Mar
Apr
May
Aug
Context3-month price -21.7%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 27, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Option | 68,476 | $43.00 |
| Aug 27, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 10,814 | $89.74 |
| Aug 27, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 107,628 | $87.09 |
| Aug 27, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 38,276 | $88.91 |
| Aug 27, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 3,448 | $87.99 |
| Aug 27, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Option | 153,676 | $43.00 |
| Aug 25, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Option | 140,650 | $42.00 |
| Aug 25, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Option | 92,850 | $42.00 |
| Aug 25, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Option | 11,348 | $43.00 |
| Aug 25, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 204 | $93.51 |
| Aug 25, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 64,796 | $92.40 |
| Aug 25, 2026 | Ratner Stevenofficer: EVP, CHRO | Sell | 356 | $91.36 |
| Aug 25, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 105,471 | $89.47 |
| Aug 25, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 2,738 | $90.60 |
| Aug 25, 2026 | KUPINSKY STUARTofficer: EVP, CLO & Corp Sec | Sell | 1,000 | $95.23 |
| Aug 21, 2026 | Ratner Stevenofficer: EVP, CHRO | Sell | 2,187 | $100.31 |
| Aug 21, 2026 | Munro Douglasofficer: SVP, CAO | Sell | 109 | $97.67 |
| Aug 21, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 26,802 | $100.31 |
| Aug 21, 2026 | Ratner Stevenofficer: EVP, CHRO | Sell | 1,026 | $97.67 |
| Aug 21, 2026 | KUPINSKY STUARTofficer: EVP, CLO & Corp Sec | Sell | 1,308 | $100.31 |
| Aug 21, 2026 | Munro Douglasofficer: SVP, CAO | Sell | 548 | $100.31 |
| Aug 21, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 22,010 | $97.67 |
| Aug 21, 2026 | Farnsworth David E.officer: EVP, CFO | Sell | 8,155 | $100.31 |
| Aug 21, 2026 | Farnsworth David E.officer: EVP, CFO | Sell | 6,612 | $97.67 |
| Aug 19, 2026 | Farnsworth David E.officer: EVP, CFO | Sell | 1,345 | $109.95 |
| Aug 19, 2026 | Farnsworth David E.officer: EVP, CFO | Sell | 7,347 | $111.36 |
| Aug 19, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 3,536 | $109.95 |
| Aug 19, 2026 | Munro Douglasofficer: SVP, CAO | Sell | 404 | $109.95 |
| Aug 19, 2026 | Ballhaus William Ldirector, officer: Chairman, President & CEO | Sell | 24,144 | $111.36 |
| Aug 19, 2026 | KUPINSKY STUARTofficer: EVP, CLO & Corp Sec | Sell | 1,178 | $111.36 |
Source: MRCY SEC Form 4 filings, latest Aug 27, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their MRCY positions over the last 6 months (SEC Form 13F).
Increased
268
New positions
145
Reduced
256
Sold out
43
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BlackRock, Inc. | Increased | 9.4M | Aug 7, 2026 |
| BLACKROCK, INC. | Increased | 8.9M | May 13, 2026 |
| JANA PARTNERS MANAGEMENT, LP | Reduced | 4.1M | May 15, 2026 |
| JANA Partners Management, LP | Reduced | 4.0M | Aug 14, 2026 |
| STATE STREET CORP | Increased | 3.9M | May 15, 2026 |
| STATE STREET CORP | Reduced | 3.4M | Aug 7, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 3.0M | Aug 13, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 2.9M | May 8, 2026 |
| Invesco Ltd. | Increased | 2.7M | Aug 14, 2026 |
| INVESCO LTD. | Increased | 2.4M | May 12, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 2.4M | Aug 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 2.4M | May 15, 2026 |
| CONESTOGA CAPITAL ADVISORS, LLC | Reduced | 1.9M | Apr 24, 2026 |
| FMR LLC | Increased | 1.8M | Aug 13, 2026 |
| T. Rowe Price Investment Management, Inc. | Increased | 1.6M | Aug 14, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.