Mercury SystemsMRCY
13F holders, Q2 2025 (June 30)285holders +32
51new positions
22sold out
8famous investors
$53.85avg. 13F price*
At the end of Q2 2025, 285 institutions reported holding Mercury Systems Inc. (MRCY) in their 13F filings, up 32 from Q1 2025. 51 opened new positions and 22 sold out. The largest holders were BlackRock, Inc. ($444.3M), JANA Partners Management, LP ($363.7M) and Vanguard Group Inc. ($296.8M). 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 Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Mercury Systems Inc.
- CUSIP
- 589378108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 51 | $194.7M |
| Exits | 22 | $16.0M |
All 13F filers, Q1 2025 → Q2 2025: 7,675,455 shares bought and 5,769,230 shares sold, net +1,906,225 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 285 holders
| BlackRock, Inc. | 0.01% | Reduce -6.0% | 8,248,969 | $444.3M |
| JANA Partners Management, LP | 18.27% | Reduce -2.7% | 6,753,413 | $363.7M |
| Vanguard Group Inc. | 0.00% | Add +0.2% | 5,509,940 | $296.8M |
| William Blair Investment Management, LLC | 0.67% | Reduce -12.6% | 4,695,683 | $252.9M |
| State Street Corp. | 0.01% | Add +8.7% | 3,246,573 | $174.9M |
| Conestoga Capital Advisors, LLC | 2.04% | Add +13.3% | 2,558,935 | $137.8M |
| Dimensional Fund Advisors LP | 0.02% | Reduce -10.4% | 1,831,375 | $98.6M |
| Victory Capital Management Inc. | 0.06% | Add +1.5% | 1,761,301 | $94.9M |
| Geode Capital Management, LLC | 0.00% | Add +0.0% | 1,265,010 | $68.1M |
| Baron Capital (BAMCO) | 0.18% | Add +3.2% | 1,234,801 | $66.5M |
| FMR LLC | 0.00% | Add +39.5% | 1,169,092 | $63.0M |
| Goldman Sachs Group Inc. | 0.01% | Add +23.6% | 1,056,914 | $56.9M |
| Neuberger Berman Group LLC | 0.04% | Reduce -0.7% | 1,056,420 | $56.9M |
| Segall Bryant & Hamill, LLC | 0.76% | Reduce -2.6% | 999,185 | $53.8M |
| Loomis Sayles & Co. L P | 0.07% | Add +321.7% | 992,610 | $53.5M |
| T. Rowe Price Investment Management, Inc. | 0.03% | New | 968,815 | $52.2M |
| Snyder Capital Management L P | 1.10% | Reduce -15.1% | 957,902 | $51.6M |
| Morgan Stanley | 0.00% | Add +71.0% | 928,171 | $50.0M |
| First Trust Advisors LP | 0.03% | Reduce -17.3% | 781,009 | $42.1M |
| Royal Bank of Canada | 0.01% | Add +0.5% | 766,098 | $41.3M |
| Fisher Asset Management | 0.02% | Add +0.1% | 721,333 | $38.9M |
| Van Eck Associates Corp. | 0.04% | Add +21.3% | 708,560 | $38.2M |
| Charles Schwab Investment Management Inc. | 0.01% | Reduce -4.7% | 640,950 | $34.5M |
| Invesco Ltd. | 0.01% | Reduce -4.4% | 583,707 | $31.4M |
| Lord, Abbett & Co. LLC | 0.10% | New | 552,646 | $29.8M |
| Northern Trust Corp. | 0.00% | Reduce -7.5% | 546,922 | $29.5M |
| Kennedy Capital Management LLC | 0.68% | Add +51.0% | 530,933 | $28.6M |
| Millennium Management | 0.03% | Reduce -25.7% | 508,418 | $27.4M |
| Staley Capital Advisers Inc. | 1.08% | Reduce -0.6% | 470,130 | $25.3M |
| Emerald Advisers, LLC | 0.90% | New | 456,713 | $24.6M |
| Scopia Capital Management LP | 2.94% | Reduce -48.8% | 446,623 | $24.1M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.04% | Add +58.7% | 423,483 | $22.8M |
| Ameriprise Financial Inc. | 0.01% | Add +10.3% | 415,809 | $22.4M |
| Oberweis Asset Management Inc./ | 0.93% | Reduce -3.4% | 398,500 | $21.5M |
| MetLife Investment Management, LLC | 0.12% | Reduce -20.2% | 393,013 | $21.2M |
| Silvercrest Asset Management Group LLC | 0.14% | New | 387,119 | $20.9M |
| WCM Investment Management, LLC | 0.04% | Reduce -19.8% | 354,684 | $18.9M |
| Aristotle Capital Boston, LLC | 0.87% | Reduce -4.6% | 315,550 | $17.0M |
| Bank of New York Mellon Corp | 0.00% | Add +0.3% | 312,822 | $16.8M |
| Bank of America Corp. | 0.00% | Add +17.8% | 300,540 | $16.2M |
| Citadel Advisors | 0.01% | Add +56.8% | 296,977 | $16.0M |
| Principal Financial Group Inc. | 0.01% | Add +2.8% | 282,599 | $15.2M |
| Emerald Mutual Fund Advisers Trust | 0.86% | New | 263,218 | $14.2M |
| Comerica Bank | 0.05% | Add +11.4% | 243,270 | $13.1M |
| Royce & Associates LP | 0.13% | Reduce -8.6% | 235,459 | $12.7M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +37.2% | 219,007 | $11.8M |
| Driehaus Capital Management LLC | 0.09% | New | 218,346 | $11.8M |
| Barclays PLC | 0.00% | Add +26.6% | 193,468 | $10.4M |
| Prudential Financial Inc. | 0.01% | Add +286.2% | 193,175 | $10.4M |
| Sei Investments Co. | 0.01% | Add +11.6% | 190,599 | $10.3M |
| Nuveen, LLC | 0.00% | Reduce -9.5% | 183,749 | $9.9M |
| Public Sector Pension Investment Board | 0.04% | Add +7.7% | 173,201 | $9.3M |
| Verition Fund Management LLC | 0.06% | Add +14.3% | 172,250 | $9.3M |
| Allspring Global Investments Holdings, LLC | 0.02% | New | 179,111 | $9.1M |
| UBS Group AG | 0.00% | Reduce -70.0% | 168,332 | $9.1M |
| Raymond James Financial Inc. | 0.00% | Add +10.1% | 166,478 | $9.0M |
| Legal & General Group Plc | 0.00% | Add +1.4% | 164,243 | $8.8M |
| Mutual of America Capital Management LLC | 0.09% | Add +136.6% | 157,856 | $8.5M |
| Macquarie Group Ltd. | 0.01% | Add +6.2% | 157,470 | $8.5M |
| Rhumbline Advisers | 0.01% | Add +0.7% | 155,746 | $8.4M |
| Two Sigma Investments, LP | 0.02% | Reduce -3.1% | 154,399 | $8.3M |
| Axiom Investors LLC | 0.06% | Add +110.1% | 142,108 | $7.7M |
| 13D Management LLC | 6.73% | Reduce -32.4% | 137,012 | $7.4M |
| LPL Financial LLC | 0.00% | Reduce -0.8% | 128,256 | $6.9M |
| Blair William & Co. | 0.02% | Reduce -5.4% | 125,047 | $6.7M |
| JPMorgan Chase & Co. | 0.00% | Add +30.3% | 124,973 | $6.7M |
| Trexquant Investment LP | 0.07% | Add +0.9% | 122,321 | $6.6M |
| King Luther Capital Management Corp. | 0.03% | Add +41.2% | 107,443 | $5.8M |
| Vident Advisory, LLC | 0.06% | Add +34.3% | 102,751 | $5.5M |
| Swiss National Bank | 0.00% | Reduce -1.3% | 96,900 | $5.2M |
| Lisanti Capital Growth, LLC | 1.41% | Add +58.5% | 94,205 | $5.1M |
| Castleark Management LLC | 0.15% | New | 92,800 | $5.0M |
| Tudor Investment Corporation | 0.04% | Reduce -25.4% | 91,434 | $4.9M |
| Citigroup Inc. | 0.00% | Reduce -20.2% | 90,051 | $4.9M |
| Russell Investments Group, Ltd. | 0.01% | Add +106.9% | 84,519 | $4.6M |
| Select Equity Group, L.P. | 0.02% | Add +351.6% | 83,770 | $4.5M |
| Rice Hall James & Associates, LLC | 0.22% | Add +60.5% | 74,199 | $4.0M |
| D. E. Shaw & Co. | 0.00% | Reduce -20.3% | 72,924 | $3.9M |
| Great Lakes Advisors, LLC | 0.03% | New | 69,485 | $3.7M |
| Susquehanna International Group, LLP | 0.01% | Add +8.4% | 69,315 | $3.7M |
| Marshall Wace, LLP | 0.00% | Reduce -87.3% | 67,916 | $3.7M |
| State of Wisconsin Investment Board | 0.01% | Reduce -1.4% | 61,115 | $3.3M |
| New York State Teachers Retirement System | 0.01% | No change | 59,911 | $3.2M |
| Alliancebernstein L.P. | 0.00% | Reduce -8.8% | 59,745 | $3.2M |
| Zions Bancorporation, National Association | 0.17% | Add +6.5% | 58,286 | $3.1M |
| Kettle Hill Capital Management, LLC | 0.72% | New | 57,905 | $3.1M |
| B. Metzler seel. Sohn & Co. AG | 0.03% | Reduce -24.3% | 57,891 | $3.1M |
| Cerity Partners LLC | 0.01% | Add +0.4% | 57,552 | $3.1M |
| Natixis Advisors, LLC | 0.00% | Add +115.3% | 57,347 | $3.1M |
| Calamos Advisors LLC | 0.02% | Add +179.2% | 54,954 | $3.0M |
| Wells Fargo & Company | 0.00% | Add +12.5% | 50,761 | $2.7M |
| Neo Ivy Capital Management | 0.87% | New | 50,632 | $2.7M |
| Archon Capital Management LLC | 2.19% | New | 49,600 | $2.7M |
| California State Teachers Retirement System | 0.00% | Add +0.9% | 46,848 | $2.5M |
| Squarepoint Ops LLC | 0.01% | Add +406.1% | 45,871 | $2.5M |
| T. Rowe Price Associates Inc. | 0.00% | Add +7.4% | 43,988 | $2.4M |
| Gotham Asset Management | 0.01% | Add +52.6% | 42,769 | $2.3M |
| CANADA LIFE ASSURANCE Co | 0.00% | Reduce -3.1% | 42,446 | $2.3M |
| Moody National Bank Trust Division | 0.20% | No change | 41,014 | $2.2M |
| Deutsche Bank AG | 0.00% | Reduce -28.3% | 40,304 | $2.2M |
"% of holder's portfolio" is MRCY's weight in each manager's 13F, not the share of Mercury Systems Inc. the manager owns.