Mercury Systems Ownership | Who Owns Mercury Systems?
Mercury Systems Ownership Summary
Mercury Systems is owned by 107.32% institutional investors, 1.69% 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 5.36% of its assets in Mercury Systems shares.
MRCY Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Mercury Systems | 107.32% | 1.69% | -9.01% |
| Sector | Industrials Stocks | 49.67% | 15.62% | 34.71% |
| Industry | Defense Stocks | 54.23% | 11.75% | 34.02% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock | 8.81M | 15.27% | $237.75M |
| Blackrock funding, inc. /de | 8.92M | 15.01% | $650.38M |
| Vanguard group | 5.63M | 9.48% | $411.20M |
| Jana partners management, lp | 4.11M | 6.91% | $299.47M |
| State street | 3.87M | 6.51% | $281.85M |
| Invesco | 2.44M | 4.11% | $178.02M |
| Conestoga capital advisors | 1.92M | 3.23% | $139.88M |
| T. rowe price investment management | 1.58M | 2.66% | $115.19M |
| Geode capital management | 1.53M | 2.57% | $111.26M |
| Dimensional fund advisors lp | 1.23M | 2.07% | $89.52M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Jana partners management, lp | 4.11M | 18.65% | $299.47M |
| 13d management | 60.46K | 6.83% | $4.41M |
| Freshford capital management | 154.06K | 5.61% | $11.23M |
| Archon capital management | 95.81K | 3.94% | $6.99M |
| Candelo capital management lp | 60.46K | 3.64% | $4.41M |
| Conestoga capital advisors | 1.92M | 2.79% | $139.88M |
| Deepwater asset management | 56.62K | 2.62% | $4.13M |
| Steel partners | 66.54K | 2.27% | $1.80M |
| Sasco capital inc / ct/ | 561.03K | 2.14% | $15.14M |
| Mesirow institutional investment management | 500.83K | 1.62% | $21.03M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock | 8.81M | 0.01% | 1.40M |
| Wellington management group llp | 755.52K | 0.01% | 755.52K |
| Invesco | 2.44M | 0.03% | 530.84K |
| State street | 3.87M | 0.01% | 442.12K |
| Artisan partners limited partnership | 354.26K | 0.04% | 354.26K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Starboard value lp | - | - | -2.29M |
| Jana partners management, lp | 4.11M | 18.65% | -852.06K |
| Westwood group | - | - | -787.79K |
| William blair investment management | 327.29K | 0.08% | -656.99K |
| Segall bryant & hamill | - | - | -636.53K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Wellington management group llp | 755.52K | 0.01% | 755.52K | $55.09M |
| Artisan partners limited partnership | 354.26K | 0.04% | 354.26K | $25.83M |
| Vanguard fiduciary trust | 349.23K | 0.01% | 349.23K | $25.46M |
| Vanguard asset management | 43.11K | 0.00% | 43.11K | $3.14M |
| Freemont management | 31.70K | 0.35% | 31.70K | $2.31M |
Sold Out
| Holder | Change |
|---|---|
| Stephens consulting | -1.00 |
| Capital performance advisors llp | -4.00 |
| Td capital management | -4.00 |
| Gradient investments | -5.00 |
| Flagship harbor advisors | -5.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 356 | 0.28% | 63,762,584 | -1.29% | 107 | 0.91% | 185 | 0.54% | 120 | 5.26% |
| Dec 31, 2025 | 116 | -64.95% | 12,737,056 | -80.36% | 21 | 0.18% | 47 | -73.14% | 38 | -64.81% |
| Sep 30, 2025 | 135 | -53.77% | 14,134,983 | -78.27% | 23 | 0.20% | 73 | -56.80% | 39 | -49.35% |
| 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% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 3.22M | 5.36% | 693.00 |
| Stt Strt® SPDR® S&P® Arspc & Dfnc ETF | 1.73M | 2.88% | -11.40K |
| Vanguard Total Stock Mkt Idx Inv | 1.72M | 2.86% | 10.70K |
| Vanguard US Total Market Shares ETF | 1.60M | 2.69% | 1.79K |
| Victory Small Cap Value CIT (Net 75) | 1.56M | 2.62% | 240.00K |
| iShares Russell 2000 ETF | 1.28M | 2.13% | 10.76K |
| SPDR® S&P Aerospace & Defense ETF | 1.26M | 2.10% | - |
| Victory Sycamore Small Company Opp R | 1.25M | 2.09% | -52.00K |
| Vanguard Small Cap Index | 1.25M | 2.08% | 18.90K |
| William Blair Sml-Mid Cap Grwth CIT Cl A | 1.17M | 1.96% | 1.17M |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| May 12, 2026 | Carvalho Orlando D | - | Sell | $625.53K |
| May 11, 2026 | Ratner Steven | EVP, CHRO | Sell | $184.92K |
| Apr 16, 2026 | Farnsworth David E. | EVP, CFO | Sell | $307.66K |
| Mar 03, 2026 | JANA Partners Management, LP | See Remarks | Sell | $15.20M |
| Mar 02, 2026 | JANA Partners Management, LP | See Remarks | Sell | $17.17M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q2 | - | 3 |
| 2026 Q1 | - | 7 |
| 2025 Q4 | - | 3 |
| 2025 Q3 | - | 13 |
| 2025 Q2 | - | 7 |
MRCY Ownership FAQ
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