Mercury SystemsMRCY
13F holders, Q2 2026 (June 30)392holders +35
82new positions
43sold out
6famous investors
$122.13avg. 13F price*
At the end of Q2 2026, 392 institutions reported holding Mercury Systems Inc. (MRCY) in their 13F filings, up 35 from Q1 2026. 82 opened new positions and 43 sold out. The largest holders were BlackRock, Inc. ($1.1B), JANA Partners Management, LP ($484.3M) and State Street Corp. ($418.0M). 6 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 David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Mercury Systems Inc.
- CUSIP
- 589378108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 82 | $139.7M |
| Exits | 43 | $58.4M |
All 13F filers, Q1 2026 → Q2 2026: 5,590,874 shares bought and 5,131,144 shares sold, net +459,730 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 392 holders
| BlackRock, Inc. | 0.02% | Add +5.0% | 9,370,902 | $1.1B |
| JANA Partners Management, LP | 25.46% | Reduce -3.6% | 3,958,849 | $484.3M |
| State Street Corp. | 0.01% | Reduce -11.6% | 3,418,290 | $418.0M |
| Vanguard Portfolio Management LLC | 0.02% | Add +4.1% | 3,031,459 | $370.8M |
| Invesco Ltd. | 0.03% | Add +9.3% | 2,669,450 | $326.6M |
| Vanguard Capital Management LLC | 0.01% | Add +0.8% | 2,422,629 | $296.4M |
| FMR LLC | 0.01% | Add +103.8% | 1,842,103 | $225.3M |
| T. Rowe Price Investment Management, Inc. | 0.13% | Add +1.0% | 1,595,711 | $195.2M |
| Goldman Sachs Group Inc. | 0.02% | Add +31.2% | 1,575,727 | $192.8M |
| Conestoga Capital Advisors, LLC | 3.96% | Reduce -22.5% | 1,487,191 | $181.9M |
| Geode Capital Management, LLC | 0.01% | Reduce -4.3% | 1,459,574 | $178.6M |
| First Trust Advisors LP | 0.09% | Add +11.9% | 1,298,957 | $158.9M |
| T. Rowe Price Associates Inc. | 0.02% | Add +25.0% | 1,285,569 | $157.3M |
| Dimensional Fund Advisors LP | 0.03% | Reduce -5.8% | 1,156,682 | $141.4M |
| Segall Bryant & Hamill, LLC | 1.49% | Add +10.1% | 1,029,491 | $125.9M |
| Fisher Asset Management | 0.03% | Reduce -3.7% | 944,069 | $115.5M |
| Franklin Resources Inc. | 0.02% | Add +86.7% | 846,732 | $103.6M |
| Neuberger Berman Group LLC | 0.07% | Reduce -7.6% | 841,556 | $102.1M |
| Morgan Stanley | 0.01% | Add +20.9% | 811,565 | $99.3M |
| Wellington Management Group LLP | 0.02% | Add +2.6% | 775,502 | $94.9M |
| Van Eck Associates Corp. | 0.06% | Reduce -10.4% | 762,994 | $93.3M |
| Raymond James Financial Inc. | 0.02% | Reduce -5.7% | 748,808 | $91.6M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.11% | Reduce -16.7% | 715,977 | $87.6M |
| Loomis Sayles & Co. L P | 0.10% | Add +5.5% | 681,142 | $83.3M |
| American Century Companies Inc. | 0.04% | Add +14.1% | 664,960 | $81.3M |
| Lord, Abbett & Co. LLC | 0.24% | Add +3.0% | 661,714 | $80.9M |
| Emerald Advisers, LLC | 1.84% | Add +7.3% | 638,682 | $78.1M |
| Charles Schwab Investment Management Inc. | 0.01% | Reduce -1.3% | 627,581 | $76.8M |
| Baron Capital (BAMCO) | 0.11% | Reduce -5.9% | 606,919 | $74.2M |
| Northern Trust Corp. | 0.01% | Add +9.1% | 597,751 | $73.1M |
| Kennedy Capital Management LLC | 1.28% | Add +0.4% | 591,802 | $72.4M |
| Snyder Capital Management L P | 1.20% | Reduce -2.5% | 566,155 | $69.3M |
| Ameriprise Financial Inc. | 0.01% | Reduce -49.7% | 499,207 | $61.1M |
| Driehaus Capital Management LLC | 0.35% | Add +65.6% | 487,921 | $59.7M |
| American Capital Management Inc. | 2.67% | New | 486,064 | $59.5M |
| Allspring Global Investments Holdings, LLC | 0.09% | Reduce -17.2% | 474,866 | $58.4M |
| Bessemer Group Inc. | 0.08% | Add +1.6% | 456,829 | $55.9M |
| Emerald Mutual Fund Advisers Trust | 1.77% | Add +9.8% | 412,354 | $50.4M |
| Voya Investment Management LLC | 0.05% | Reduce -32.7% | 410,076 | $50.2M |
| Royal Bank of Canada | 0.01% | Reduce -26.0% | 394,081 | $48.2M |
| Oberweis Asset Management Inc./ | 0.99% | Add +0.4% | 392,723 | $48.0M |
| Vanguard Fiduciary Trust Co. | 0.01% | Add +9.6% | 382,819 | $46.8M |
| William Blair Investment Management, LLC | 0.14% | Add +16.0% | 379,732 | $46.5M |
| Artisan Partners Limited Partnership | 0.07% | Add +5.2% | 372,818 | $45.6M |
| Jennison Associates LLC | 0.03% | Reduce -48.4% | 354,894 | $43.4M |
| Bank of New York Mellon Corp | 0.01% | Reduce -0.1% | 314,217 | $38.4M |
| Silvercrest Asset Management Group LLC | 0.23% | Reduce -7.9% | 285,581 | $34.9M |
| UBS Group AG | 0.01% | Add +17.9% | 274,799 | $33.6M |
| Sei Investments Co. | 0.03% | Reduce -29.5% | 261,712 | $32.0M |
| Principal Financial Group Inc. | 0.02% | Add +0.6% | 258,561 | $31.6M |
| Swedbank AB | 0.03% | Add +342.1% | 244,299 | $29.9M |
| Aristotle Capital Boston, LLC | 2.00% | Reduce -8.3% | 244,228 | $29.9M |
| Royce & Associates LP | 0.23% | Add +8.3% | 238,327 | $29.2M |
| King Luther Capital Management Corp. | 0.12% | Add +8.9% | 228,825 | $28.0M |
| Bank of America Corp. | 0.00% | Reduce -24.2% | 223,533 | $27.3M |
| Fifth Third Bancorp | 0.04% | Reduce -16.7% | 222,392 | $27.2M |
| Thrivent Financial for Lutherans | 0.04% | Add +48.0% | 207,034 | $25.3M |
| Axiom Investors LLC | 0.22% | Reduce -3.1% | 204,433 | $25.0M |
| Mutual of America Capital Management LLC | 0.24% | Reduce -5.1% | 200,867 | $24.6M |
| WCM Investment Management, LLC | 0.04% | Reduce 0.0% | 219,320 | $24.2M |
| Victory Capital Management Inc. | 0.01% | Reduce -14.4% | 193,068 | $23.6M |
| Nuveen, LLC | 0.01% | Reduce -19.5% | 186,625 | $22.8M |
| Public Sector Pension Investment Board | 0.06% | Reduce -3.9% | 181,537 | $22.2M |
| JPMorgan Chase & Co. | 0.00% | Reduce -21.9% | 193,475 | $21.6M |
| MetLife Investment Management, LLC | 0.10% | Reduce -41.3% | 173,537 | $21.2M |
| Select Equity Group, L.P. | 0.11% | Add +98.0% | 165,257 | $20.2M |
| BNP Paribas Financial Markets | 0.01% | Add +1.8% | 158,224 | $19.4M |
| Deutsche Bank AG | 0.01% | Add +11.8% | 142,678 | $17.5M |
| Nomura Asset Management International Inc. | 0.03% | Reduce -50.8% | 142,027 | $17.4M |
| Wells Fargo & Company | 0.00% | Add +10.7% | 136,983 | $16.8M |
| Peregrine Capital Management LLC | 0.54% | Reduce -0.8% | 135,071 | $16.5M |
| New York State Common Retirement Fund | 0.02% | Reduce -31.2% | 133,229 | $16.3M |
| Rhumbline Advisers | 0.01% | Reduce -11.7% | 127,926 | $15.6M |
| Legal & General Group Plc | 0.00% | Reduce -16.7% | 126,258 | $15.4M |
| Vident Advisory, LLC | 0.11% | Reduce -3.7% | 123,337 | $15.1M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +5.5% | 122,585 | $15.0M |
| Jane Street Group, LLC | 0.01% | New | 115,338 | $14.1M |
| DF Dent & Co. Inc. | 0.26% | New | 113,611 | $13.9M |
| Man Group plc | 0.03% | Reduce -23.6% | 110,597 | $13.5M |
| Swiss National Bank | 0.01% | Add +1.4% | 108,400 | $13.3M |
| Agman Capital LLC | 7.90% | Reduce -5.7% | 102,403 | $12.5M |
| Heights Point Management, LP | 9.77% | Reduce -17.7% | 100,375 | $12.3M |
| Summit Partners Public Asset Management, LLC | 0.31% | New | 98,122 | $12.0M |
| Russell Investments Group, Ltd. | 0.01% | Reduce -14.9% | 93,881 | $11.5M |
| Freshford Capital Management, LLC | 3.92% | Reduce -39.1% | 93,761 | $11.5M |
| Penserra Capital Management LLC | 0.08% | Add +17.2% | 80,559 | $9.9M |
| Blair William & Co. | 0.02% | Reduce -1.4% | 77,712 | $9.5M |
| Quantinno Capital Management LP | 0.01% | Add +15.4% | 76,112 | $9.3M |
| Two Sigma Investments, LP | 0.01% | Reduce -55.7% | 71,861 | $8.8M |
| State of Wisconsin Investment Board | 0.02% | Reduce -12.0% | 67,350 | $8.2M |
| California State Teachers Retirement System | 0.01% | Reduce -1.9% | 62,374 | $7.6M |
| Nordea Investment Management AB | 0.01% | Add +2.0% | 65,670 | $7.6M |
| D. E. Shaw & Co. | 0.01% | Add +12.6% | 61,830 | $7.6M |
| Deepwater Asset Management, LLC | 3.40% | Add +8.0% | 61,166 | $7.5M |
| 13D Management LLC | 10.37% | No change | 60,462 | $7.4M |
| Cerity Partners LLC | 0.01% | Reduce -0.5% | 60,446 | $7.4M |
| Prudential Financial Inc. | 0.01% | Add +1.8% | 55,166 | $6.7M |
| Pier Capital, LLC | 0.89% | Reduce -1.6% | 55,104 | $6.7M |
| Barclays PLC | 0.00% | Reduce -5.8% | 54,495 | $6.7M |
| Candelo Capital Management LP | 4.86% | Reduce -10.6% | 54,060 | $6.6M |
"% of holder's portfolio" is MRCY's weight in each manager's 13F, not the share of Mercury Systems Inc. the manager owns.