Mercury SystemsMRCY
13F holders, Q1 2026 (March 31)357holders +10
51new positions
40sold out
7famous investors
$72.87avg. 13F price*
At the end of Q1 2026, 357 institutions reported holding Mercury Systems Inc. (MRCY) in their 13F filings, up 10 from Q4 2025. 51 opened new positions and 40 sold out. The largest holders were BlackRock, Inc. ($650.4M), JANA Partners Management, LP ($299.5M) and State Street Corp. ($281.8M). 7 famous investors held it, including Ron Baron (0.1% of Baron Capital (BAMCO)'s portfolio), Ken Fisher (0.0% of Fisher Asset Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Mercury Systems Inc.
- CUSIP
- 589378108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 51 | $100.7M |
| Exits | 40 | $41.5M |
All 13F filers, Q4 2025 → Q1 2026: 6,536,210 shares bought and 5,745,445 shares sold, net +790,765 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 357 holders
| BlackRock, Inc. | 0.01% | Add +3.6% | 8,920,325 | $650.4M |
| JANA Partners Management, LP | 17.96% | Reduce -17.2% | 4,107,424 | $299.5M |
| State Street Corp. | 0.01% | Add +12.9% | 3,865,719 | $281.8M |
| Vanguard Portfolio Management LLC | 0.01% | — | 2,910,904 | $212.2M |
| Invesco Ltd. | 0.02% | Add +27.8% | 2,441,578 | $178.0M |
| Vanguard Capital Management LLC | 0.00% | — | 2,403,818 | $175.3M |
| Conestoga Capital Advisors, LLC | 2.79% | Reduce -11.8% | 1,918,591 | $139.9M |
| T. Rowe Price Investment Management, Inc. | 0.08% | Add +2.4% | 1,579,832 | $115.2M |
| Geode Capital Management, LLC | 0.01% | Add +11.5% | 1,525,716 | $111.3M |
| Dimensional Fund Advisors LP | 0.02% | Reduce -16.8% | 1,227,975 | $89.5M |
| Goldman Sachs Group Inc. | 0.01% | Add +3.9% | 1,201,112 | $87.6M |
| First Trust Advisors LP | 0.06% | Reduce -9.3% | 1,160,775 | $84.6M |
| T. Rowe Price Associates Inc. | 0.01% | Add +18.6% | 1,028,609 | $75.0M |
| Ameriprise Financial Inc. | 0.02% | Reduce -23.1% | 991,808 | $72.3M |
| Fisher Asset Management | 0.02% | Add +13.9% | 980,367 | $71.5M |
| Segall Bryant & Hamill, LLC | 0.98% | Add +46.9% | 934,824 | $68.2M |
| Neuberger Berman Group LLC | 0.05% | Reduce -11.6% | 910,418 | $66.3M |
| FMR LLC | 0.00% | Reduce -21.6% | 903,668 | $65.9M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.09% | Add +43.6% | 859,447 | $62.7M |
| Van Eck Associates Corp. | 0.05% | Add +17.3% | 851,145 | $62.1M |
| Raymond James Financial Inc. | 0.02% | Add +12.1% | 794,029 | $56.3M |
| Wellington Management Group LLP | 0.01% | New | 755,525 | $55.1M |
| Jennison Associates LLC | 0.03% | Add +52.9% | 688,114 | $50.2M |
| Morgan Stanley | 0.00% | Reduce -8.1% | 671,331 | $48.9M |
| Loomis Sayles & Co. L P | 0.06% | Reduce -24.2% | 645,932 | $47.1M |
| Baron Capital (BAMCO) | 0.14% | Reduce -22.8% | 645,066 | $47.0M |
| Lord, Abbett & Co. LLC | 0.16% | Add +4.3% | 642,466 | $46.8M |
| Charles Schwab Investment Management Inc. | 0.01% | Reduce -0.1% | 635,970 | $46.4M |
| Voya Investment Management LLC | 0.05% | Add +19.1% | 609,256 | $44.4M |
| Emerald Advisers, LLC | 1.37% | Add +12.1% | 595,314 | $43.4M |
| Kennedy Capital Management LLC | 0.91% | Reduce -12.1% | 589,249 | $43.0M |
| Allspring Global Investments Holdings, LLC | 0.07% | Reduce -23.9% | 573,456 | $42.9M |
| American Century Companies Inc. | 0.02% | Add +144.0% | 582,895 | $42.5M |
| Snyder Capital Management L P | 0.82% | Reduce -22.4% | 580,654 | $42.3M |
| Northern Trust Corp. | 0.01% | Add +5.8% | 548,063 | $40.0M |
| Royal Bank of Canada | 0.01% | Reduce -17.3% | 532,687 | $38.8M |
| Franklin Resources Inc. | 0.01% | Add +117.6% | 453,633 | $33.1M |
| Bessemer Group Inc. | 0.05% | Add +12.6% | 449,689 | $32.8M |
| Oberweis Asset Management Inc./ | 0.84% | Reduce -5.6% | 391,023 | $28.5M |
| Emerald Mutual Fund Advisers Trust | 1.33% | Add +11.7% | 375,472 | $27.4M |
| Sei Investments Co. | 0.02% | Reduce -1.9% | 370,992 | $27.0M |
| Artisan Partners Limited Partnership | 0.04% | New | 354,265 | $25.8M |
| Vanguard Fiduciary Trust Co. | 0.01% | — | 349,225 | $25.5M |
| William Blair Investment Management, LLC | 0.08% | Reduce -66.8% | 327,288 | $23.9M |
| Bank of New York Mellon Corp | 0.00% | Reduce -2.5% | 314,399 | $22.9M |
| Silvercrest Asset Management Group LLC | 0.16% | Add +2.6% | 310,168 | $22.6M |
| MetLife Investment Management, LLC | 0.11% | Add +10.2% | 295,739 | $21.6M |
| Bank of America Corp. | 0.00% | Add +19.5% | 294,918 | $21.5M |
| Driehaus Capital Management LLC | 0.16% | Reduce -3.3% | 294,628 | $21.5M |
| Citadel Advisors | 0.02% | Add +180.6% | 292,866 | $21.4M |
| Nomura Asset Management International Inc. | 0.04% | Add +61.5% | 288,540 | $21.0M |
| Fifth Third Bancorp | 0.04% | Add +22232.9% | 267,101 | $19.5M |
| Aristotle Capital Boston, LLC | 1.21% | Reduce -4.6% | 266,417 | $19.5M |
| Principal Financial Group Inc. | 0.01% | Reduce -2.0% | 257,100 | $18.7M |
| JPMorgan Chase & Co. | 0.00% | Add +127.1% | 247,887 | $17.3M |
| UBS Group AG | 0.00% | Reduce -7.2% | 233,071 | $17.0M |
| Nuveen, LLC | 0.00% | Reduce -34.0% | 231,784 | $16.9M |
| Victory Capital Management Inc. | 0.01% | Reduce -0.8% | 225,618 | $16.4M |
| Royce & Associates LP | 0.16% | Add +11.6% | 219,980 | $16.0M |
| Mutual of America Capital Management LLC | 0.18% | Reduce -3.5% | 211,752 | $15.4M |
| Axiom Investors LLC | 0.17% | Add +15.3% | 211,068 | $15.4M |
| WCM Investment Management, LLC | 0.04% | Reduce -17.2% | 219,324 | $15.3M |
| King Luther Capital Management Corp. | 0.07% | Add +3.6% | 210,037 | $15.3M |
| New York State Common Retirement Fund | 0.02% | Add +39.0% | 193,627 | $14.1M |
| Public Sector Pension Investment Board | 0.04% | Add +3.2% | 188,960 | $13.8M |
| Two Sigma Investments, LP | 0.01% | Add +7.9% | 162,069 | $11.8M |
| BNP Paribas Financial Markets | 0.01% | Reduce -5.5% | 155,380 | $11.3M |
| Freshford Capital Management, LLC | 5.61% | Reduce -15.6% | 154,065 | $11.2M |
| Legal & General Group Plc | 0.00% | Reduce -5.7% | 151,645 | $11.1M |
| Rhumbline Advisers | 0.01% | Add +1.7% | 144,794 | $10.6M |
| Man Group plc | 0.02% | Reduce -24.6% | 144,724 | $10.6M |
| Thrivent Financial for Lutherans | 0.02% | Add +284.9% | 139,857 | $10.2M |
| Peregrine Capital Management LLC | 0.37% | Reduce -4.2% | 136,175 | $9.9M |
| Penn Capital Management Company, LLC | 0.72% | Reduce -33.4% | 127,789 | $9.3M |
| Vident Advisory, LLC | 0.08% | Add +5.1% | 128,059 | $9.3M |
| Deutsche Bank AG | 0.00% | Reduce -0.9% | 127,592 | $9.3M |
| Wells Fargo & Company | 0.00% | Reduce -17.0% | 123,719 | $9.0M |
| Heights Point Management, LP | 8.24% | Reduce -14.8% | 121,898 | $8.9M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +0.5% | 116,172 | $8.5M |
| Qube Research & Technologies Ltd | 0.01% | Add +115.9% | 111,190 | $8.1M |
| Russell Investments Group, Ltd. | 0.01% | Add +22.9% | 110,372 | $8.0M |
| Agman Capital LLC | 6.31% | Reduce -11.6% | 108,632 | $7.9M |
| Swiss National Bank | 0.00% | Add +0.4% | 106,900 | $7.8M |
| Archon Capital Management LLC | 3.95% | Add +28.4% | 95,814 | $7.0M |
| Edgestream Partners, L.P. | 0.21% | Add +87.0% | 88,208 | $6.4M |
| Select Equity Group, L.P. | 0.03% | Add +7.3% | 83,466 | $6.1M |
| Blair William & Co. | 0.02% | Reduce -6.0% | 78,791 | $5.7M |
| State of Wisconsin Investment Board | 0.01% | Add +36.2% | 76,505 | $5.6M |
| Penserra Capital Management LLC | 0.06% | Reduce -14.7% | 68,713 | $5.0M |
| Quantinno Capital Management LP | 0.01% | Reduce -0.9% | 65,977 | $4.8M |
| AQR Capital Management | 0.00% | Add +61.0% | 67,280 | $4.8M |
| California State Teachers Retirement System | 0.00% | Add +24.1% | 63,570 | $4.6M |
| Nordea Investment Management AB | 0.00% | Reduce -4.4% | 64,402 | $4.6M |
| Alliancebernstein L.P. | 0.00% | No change | 60,816 | $4.4M |
| Cerity Partners LLC | 0.01% | Add +2.0% | 60,763 | $4.4M |
| 13D Management LLC | 6.83% | Reduce -41.7% | 60,462 | $4.4M |
| Candelo Capital Management LP | 4.44% | Reduce -5.9% | 60,460 | $4.4M |
| Barclays PLC | 0.00% | Reduce -61.2% | 57,822 | $4.2M |
| Deepwater Asset Management, LLC | 2.62% | Reduce -16.1% | 56,624 | $4.1M |
| Calamos Advisors LLC | 0.02% | Add +13.3% | 56,479 | $4.1M |
"% of holder's portfolio" is MRCY's weight in each manager's 13F, not the share of Mercury Systems Inc. the manager owns.