Mercury SystemsMRCY
13F holders, Q4 2025 (December 31)347holders +21
41new positions
31sold out
8famous investors
$73.07avg. 13F price*
At the end of Q4 2025, 347 institutions reported holding Mercury Systems Inc. (MRCY) in their 13F filings, up 21 from Q3 2025. 41 opened new positions and 31 sold out. The largest holders were BlackRock, Inc. ($628.7M), Vanguard Group Inc. ($411.2M) and JANA Partners Management, LP ($362.1M). 8 famous investors held it, including Ron Baron (0.2% of Baron Capital (BAMCO)'s portfolio), Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio) and Ken Fisher (0.0% of Fisher Asset Management's portfolio).
- Company
- Mercury Systems Inc.
- CUSIP
- 589378108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 41 | $67.9M |
| Exits | 31 | $31.7M |
All 13F filers, Q3 2025 → Q4 2025: 6,068,644 shares bought and 6,785,336 shares sold, net −716,692 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 347 holders
| BlackRock, Inc. | 0.01% | Add +1.6% | 8,611,638 | $628.7M |
| Vanguard Group Inc. | 0.01% | Reduce -1.7% | 5,632,049 | $411.2M |
| JANA Partners Management, LP | 18.84% | Reduce -16.8% | 4,959,481 | $362.1M |
| State Street Corp. | 0.01% | Add +12.1% | 3,423,600 | $250.0M |
| Conestoga Capital Advisors, LLC | 2.67% | Reduce -4.6% | 2,174,807 | $158.8M |
| Invesco Ltd. | 0.01% | Add +25.1% | 1,910,742 | $139.5M |
| T. Rowe Price Investment Management, Inc. | 0.07% | Add +1.4% | 1,542,851 | $112.6M |
| Dimensional Fund Advisors LP | 0.02% | Reduce -15.4% | 1,475,821 | $107.8M |
| Geode Capital Management, LLC | 0.01% | Add +3.6% | 1,368,659 | $99.9M |
| Ameriprise Financial Inc. | 0.02% | Add +360.0% | 1,289,685 | $94.2M |
| First Trust Advisors LP | 0.07% | Reduce -16.5% | 1,279,384 | $93.4M |
| Goldman Sachs Group Inc. | 0.01% | Reduce -6.7% | 1,156,397 | $84.4M |
| FMR LLC | 0.00% | Reduce -22.3% | 1,152,192 | $84.1M |
| Neuberger Berman Group LLC | 0.06% | Reduce -1.6% | 1,030,103 | $75.2M |
| William Blair Investment Management, LLC | 0.20% | Reduce -60.4% | 984,273 | $71.9M |
| T. Rowe Price Associates Inc. | 0.01% | Add +0.2% | 867,670 | $63.3M |
| Fisher Asset Management | 0.02% | Reduce -1.7% | 860,383 | $62.8M |
| Loomis Sayles & Co. L P | 0.07% | Reduce -3.7% | 851,817 | $62.2M |
| Baron Capital (BAMCO) | 0.17% | Reduce -35.5% | 835,823 | $61.0M |
| Allspring Global Investments Holdings, LLC | 0.09% | Add +8.6% | 753,695 | $57.3M |
| Snyder Capital Management L P | 1.02% | Reduce -4.2% | 748,536 | $54.7M |
| Morgan Stanley | 0.00% | Reduce -16.6% | 730,676 | $53.3M |
| Van Eck Associates Corp. | 0.04% | Add +0.6% | 725,387 | $53.0M |
| Raymond James Financial Inc. | 0.02% | Add +267.1% | 708,054 | $52.1M |
| Kennedy Capital Management LLC | 1.04% | Add +2.0% | 670,489 | $49.0M |
| Royal Bank of Canada | 0.01% | Reduce -5.3% | 644,132 | $47.0M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +0.0% | 636,624 | $46.5M |
| Segall Bryant & Hamill, LLC | 0.63% | Reduce -7.0% | 636,526 | $46.5M |
| Lord, Abbett & Co. LLC | 0.14% | Reduce -20.1% | 615,808 | $45.0M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.07% | Add +0.5% | 598,624 | $43.7M |
| Emerald Advisers, LLC | 1.19% | Reduce -0.4% | 531,115 | $38.8M |
| Northern Trust Corp. | 0.00% | Reduce -5.8% | 517,783 | $37.8M |
| Voya Investment Management LLC | 0.04% | Add +1492.2% | 511,324 | $37.3M |
| Jennison Associates LLC | 0.02% | Reduce -16.1% | 449,967 | $32.9M |
| Oberweis Asset Management Inc./ | 1.11% | Add +3.9% | 414,040 | $30.2M |
| Bessemer Group Inc. | 0.04% | Add +45.6% | 399,496 | $29.2M |
| Sei Investments Co. | 0.03% | Add +21.4% | 378,357 | $27.6M |
| Nuveen, LLC | 0.01% | Reduce -2.5% | 351,130 | $25.6M |
| Emerald Mutual Fund Advisers Trust | 1.20% | No change | 336,058 | $24.5M |
| Bank of New York Mellon Corp | 0.00% | Add +3.6% | 322,300 | $23.5M |
| Driehaus Capital Management LLC | 0.15% | Add +37.9% | 304,726 | $22.2M |
| Silvercrest Asset Management Group LLC | 0.15% | Reduce -21.9% | 302,257 | $22.1M |
| Comerica Bank | 0.09% | Add +31.7% | 292,098 | $21.3M |
| Aristotle Capital Boston, LLC | 1.12% | Reduce -9.0% | 279,317 | $20.4M |
| MetLife Investment Management, LLC | 0.09% | Reduce -12.6% | 268,362 | $19.6M |
| WCM Investment Management, LLC | 0.04% | Reduce -24.4% | 264,889 | $19.6M |
| Principal Financial Group Inc. | 0.01% | Reduce -7.4% | 262,294 | $19.2M |
| UBS Group AG | 0.00% | Add +4.5% | 251,229 | $18.3M |
| Bank of America Corp. | 0.00% | Reduce -2.3% | 246,737 | $18.0M |
| American Century Companies Inc. | 0.01% | Add +3936.7% | 238,932 | $17.4M |
| Victory Capital Management Inc. | 0.01% | Reduce -69.7% | 227,533 | $16.6M |
| Mutual of America Capital Management LLC | 0.17% | Reduce -2.7% | 219,363 | $16.0M |
| Franklin Resources Inc. | 0.00% | Add +768.9% | 208,449 | $15.2M |
| King Luther Capital Management Corp. | 0.06% | Add +94.4% | 202,643 | $14.8M |
| Royce & Associates LP | 0.15% | Reduce -5.5% | 197,079 | $14.4M |
| Penn Capital Management Company, LLC | 1.12% | Add +4.2% | 191,883 | $14.0M |
| Man Group plc | 0.03% | New | 192,033 | $14.0M |
| Axiom Investors LLC | 0.12% | Reduce -26.1% | 183,144 | $13.4M |
| Public Sector Pension Investment Board | 0.04% | Reduce -11.0% | 183,033 | $13.4M |
| Freshford Capital Management, LLC | 5.34% | New | 182,425 | $13.3M |
| Nomura Asset Management International Inc. | 0.02% | — | 178,681 | $13.0M |
| Prudential Financial Inc. | 0.01% | Add +30.6% | 166,138 | $12.1M |
| BNP Paribas Financial Markets | 0.01% | Add +777.3% | 164,463 | $12.0M |
| Staley Capital Advisers Inc. | 0.48% | Reduce -60.8% | 161,100 | $11.8M |
| Legal & General Group Plc | 0.00% | Reduce -2.8% | 160,874 | $11.7M |
| Two Sigma Investments, LP | 0.02% | Add +105.6% | 150,177 | $11.0M |
| Barclays PLC | 0.00% | Add +1.6% | 149,172 | $10.9M |
| Wells Fargo & Company | 0.00% | Add +138.4% | 148,989 | $10.9M |
| Cinctive Capital Management LP | 0.62% | New | 147,444 | $10.8M |
| Heights Point Management, LP | 8.91% | — | 143,068 | $10.4M |
| Rhumbline Advisers | 0.01% | Reduce -9.1% | 142,339 | $10.4M |
| Peregrine Capital Management LLC | 0.32% | Add +6562.5% | 142,178 | $10.4M |
| New York State Common Retirement Fund | 0.01% | Add +6.7% | 139,282 | $10.2M |
| Deutsche Bank AG | 0.00% | Add +185.4% | 128,705 | $9.4M |
| Agman Capital LLC | 7.63% | — | 122,836 | $9.0M |
| Vident Advisory, LLC | 0.08% | Add +2.9% | 121,888 | $8.9M |
| Castleark Management LLC | 0.25% | Add +16.7% | 118,458 | $8.6M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +0.8% | 115,635 | $8.4M |
| JPMorgan Chase & Co. | 0.00% | Reduce -40.0% | 109,132 | $8.0M |
| Swiss National Bank | 0.00% | Add +8.2% | 106,500 | $7.8M |
| Citadel Advisors | 0.01% | Reduce -30.7% | 104,376 | $7.6M |
| 13D Management LLC | 9.01% | Reduce -24.3% | 103,762 | $7.6M |
| Lisanti Capital Growth, LLC | 1.63% | Reduce -3.4% | 94,265 | $6.9M |
| Russell Investments Group, Ltd. | 0.01% | Reduce -10.6% | 89,794 | $6.6M |
| Blair William & Co. | 0.02% | Add +4.0% | 83,772 | $6.1M |
| Penserra Capital Management LLC | 0.07% | Add +4203.7% | 80,565 | $5.9M |
| Select Equity Group, L.P. | 0.03% | Reduce -25.1% | 77,821 | $5.7M |
| Archon Capital Management LLC | 3.10% | Add +203.3% | 74,600 | $5.4M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | Reduce -56.8% | 70,268 | $5.1M |
| Tudor Investment Corporation | 0.03% | Add +73.3% | 69,178 | $5.1M |
| Nordea Investment Management AB | 0.00% | New | 67,386 | $5.0M |
| Intech Investment Management LLC | 0.04% | Add +101.3% | 67,627 | $4.9M |
| Deepwater Asset Management, LLC | 1.43% | New | 67,461 | $4.9M |
| Quantinno Capital Management LP | 0.01% | Add +26.3% | 66,606 | $4.9M |
| LPL Financial LLC | 0.00% | Add +25.1% | 64,423 | $4.7M |
| Candelo Capital Management LP | 4.28% | Add +319.8% | 64,226 | $4.7M |
| Alliancebernstein L.P. | 0.00% | Add +5.9% | 60,816 | $4.4M |
| New York State Teachers Retirement System | 0.01% | No change | 59,911 | $4.4M |
| Cerity Partners LLC | 0.01% | Add +6.7% | 59,556 | $4.3M |
| D. E. Shaw & Co. | 0.00% | Add +8.2% | 58,555 | $4.3M |
"% of holder's portfolio" is MRCY's weight in each manager's 13F, not the share of Mercury Systems Inc. the manager owns.