Mercury Systems Ownership | Who Owns Mercury Systems?
Mercury Systems Ownership Summary
Mercury Systems is owned by 110.24% institutional investors, 1.87% insiders. Blackrock is the largest institutional shareholder, holding 15.27% of MRCY shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.04% of its assets in Mercury Systems shares.
MRCY Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Mercury Systems | 110.24% | 1.87% | -12.12% |
| Sector | Industrials Stocks | 64.11% | 12.72% | 23.17% |
| Industry | Defense Stocks | 62.94% | 10.55% | 26.51% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock | 8.81M | 15.27% | $237.75M |
| Blackrock funding, inc. /de | 8.48M | 14.39% | $656.13M |
| Jana partners management, lp | 5.96M | 10.11% | $461.26M |
| Vanguard group | 5.73M | 9.73% | $443.58M |
| State street | 3.06M | 5.19% | $236.48M |
| William blair investment management | 2.49M | 4.22% | $192.57M |
| Conestoga capital advisors | 2.28M | 3.87% | $176.46M |
| Dimensional fund advisors lp | 1.74M | 2.96% | $134.96M |
| First trust advisors lp | 1.53M | 2.60% | $118.64M |
| Invesco | 1.53M | 2.59% | $118.22M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Jana partners management, lp | 5.96M | 22.33% | $461.26M |
| 13d management | 137.01K | 10.17% | $10.60M |
| Conestoga capital advisors | 2.28M | 2.83% | $176.46M |
| Steel partners | 66.54K | 2.27% | $1.80M |
| Sasco capital inc / ct/ | 561.03K | 2.14% | $15.14M |
| Lisanti capital growth | 97.63K | 1.85% | $7.56M |
| Mesirow institutional investment management | 500.83K | 1.62% | $21.03M |
| Emerald mutual fund advisers trust | 336.06K | 1.34% | $26.01M |
| Ironwood investment management | 39.45K | 1.33% | $3.05M |
| Emerald advisers | 533.09K | 1.32% | $41.26M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock | 8.81M | 0.01% | 1.40M |
| Invesco | 1.53M | 0.02% | 943.74K |
| Price t rowe associates inc /md/ | 866.08K | 0.01% | 822.09K |
| First trust advisors lp | 1.53M | 0.09% | 751.81K |
| Millennium management | 1.02M | 0.02% | 677.89K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Starboard value lp | - | - | -2.29M |
| William blair investment management | 2.49M | 0.50% | -2.21M |
| Victory capital management | 750.32K | 0.03% | -1.01M |
| Jana partners management, lp | 5.96M | 22.33% | -793.93K |
| Westwood group | - | - | -787.79K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Jennison associates | 536.41K | 0.02% | 536.41K | $41.52M |
| Pier capital | 59.57K | 0.72% | 59.57K | $4.61M |
| Portolan capital management | 44.86K | 0.19% | 44.86K | $3.47M |
| Hrt financial lp | 33.33K | 0.01% | 33.33K | $2.58M |
| State of new jersey common pension fund d | 32.41K | 0.01% | 32.41K | $2.51M |
Sold Out
| Holder | Change |
|---|---|
| Stephens consulting | -1.00 |
| Capital performance advisors llp | -4.00 |
| Gradient investments | -5.00 |
| Mendota financial group | -6.00 |
| Global financial private client | -8.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2025 | 288 | 12.06% | 64,959,692 | 2.93% | 110 | 0.96% | 165 | 30.95% | 77 | -13.48% |
| Mar 31, 2025 | 254 | 2.01% | 63,101,197 | -0.66% | 107 | 0.91% | 124 | 7.83% | 89 | 2.30% |
| Dec 31, 2024 | 227 | -9.20% | 59,582,534 | -5.47% | 102 | 0.87% | 105 | -6.25% | 81 | -11.96% |
| Sep 30, 2024 | 248 | 3.33% | 63,023,819 | -2.69% | 108 | 0.86% | 112 | -12.50% | 92 | 16.46% |
| Jun 30, 2024 | 240 | 4.35% | 64,763,048 | 3.91% | 112 | 0.96% | 128 | -3.76% | 79 | 14.49% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 3.03M | 5.04% | - |
| Vanguard US Total Market Shares ETF | 1.60M | 2.69% | 1.79K |
| Vanguard Total Stock Mkt Idx Inv | 1.60M | 2.66% | -33.95K |
| Victory Small Cap Value CIT (Net 75) | 1.56M | 2.62% | 240.00K |
| Conestoga Small Cap Investors | 1.40M | 2.33% | - |
| First Trust RBA Amer Indl RenaisTM ETF | 1.37M | 2.28% | 8.55K |
| SPDR® S&P Aerospace & Defense ETF | 1.26M | 2.10% | - |
| iShares Russell 2000 ETF | 1.26M | 2.09% | - |
| Victory Sycamore Small Company Opp R | 1.25M | 2.09% | -52.00K |
| Vanguard Small Cap Index | 1.23M | 2.06% | -8.03K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Nov 12, 2025 | Munro Douglas | SVP, CAO | Sell | $97.57K |
| Nov 06, 2025 | JANA Partners Management, LP | See Remarks | Sell | $75.45M |
| Nov 07, 2025 | Plunkett Debora A | - | Sell | $125.78K |
| Sep 16, 2025 | Munro Douglas | VP, CAO | Sell | $4.92K |
| Aug 20, 2025 | Ratner Steven | EVP, CHRO | Sell | $446.31K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q4 | - | 3 |
| 2025 Q3 | - | 13 |
| 2025 Q2 | - | 7 |
| 2025 Q1 | - | 3 |
| 2024 Q4 | - | 1 |
MRCY Ownership FAQ
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