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Equibles

MRCY

Mercury Systems Inc

Company with tickers: MRCY

CIK
1049521
CUSIP
589378108
Shares Outstanding
60,043,283
13F Activity (30d)
170 filings 165 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 356
Total Value: $4,766,776,924
Total Shares: 65,378,922
Showing 1–100 of 366 holdings by value · page 1 of 4

Institutional Ownership Trend

28 quarters

Superinvestors Holding MRCY

All superinvestors →
Joel Greenblatt $497,392

Holder Concentration

Across 356 13F filers
Top Holder
13.6%
Mar 2024 → Mar 2026 · range 11.8% – 13.9%
of institutional value
Top 5
34.0%
Mar 2024 → Mar 2026 · range 34.0% – 49.9%
of institutional value
Top 10
47.3%
Mar 2024 → Mar 2026 · range 47.3% – 63.5%
of institutional value
HHI
376
Mar 2024 → Mar 2026 · range 376 – 606
Broadly held

Quarterly Activity

vs Mar 3, 2026
New
355
Increased
0
Decreased
1
Sold Out
0
Unchanged
0
Holder count: +355
Institutional value: +1195.4%
Shares held: +1488.9%

Top Buyers

vs Mar 3, 2026
No qualifying movers this quarter.

Top Sellers

vs Mar 3, 2026
Institution Sold Now Holds Open
Mid JANA Partners Management, LP −7,194 4,107,424

Top New Positions

vs Mar 3, 2026
Institution Acquired Value (USD) Open
Mega BlackRock, Inc. 8,920,325 $650,380,889
Mega STATE STREET CORP 3,865,719 $281,849,572
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 2,910,904 $212,234,010
Mega Invesco Ltd. 2,441,578 $178,015,448
Mega VANGUARD CAPITAL MANAGEMENT LLC 2,403,818 $175,262,370

Top Sold-Out Positions

vs Mar 3, 2026
No fully closed positions this quarter.
Filter: New 355 Increased 0 Reduced 1 Sold out 0 Unchanged 0
Showing 100 of 366
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $650,380,889 13.64% 8,920,325
Mid JANA Partners Management, LP $299,472,283 6.28% 4,107,424
Mega STATE STREET CORP $281,849,572 5.91% 3,865,719
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $212,234,010 4.45% 2,910,904
Mega Invesco Ltd. $178,015,448 3.73% 2,441,578
Mega VANGUARD CAPITAL MANAGEMENT LLC $175,262,370 3.68% 2,403,818
Mid Conestoga Capital Advisors, LLC $139,884,469 2.93% 1,918,591
Mega T. Rowe Price Investment Management, Inc. $115,185,551 2.42% 1,579,832
Mega GEODE CAPITAL MANAGEMENT, LLC $111,239,952 2.33% 1,525,716
Mega DIMENSIONAL FUND ADVISORS LP $89,531,655 1.88% 1,227,975
Mega GOLDMAN SACHS GROUP INC $87,573,072 1.84% 1,201,112
Mega FIRST TRUST ADVISORS LP $84,632,105 1.78% 1,160,775
Mega PRICE T ROWE ASSOCIATES INC /MD/ $74,995,881 1.57% 1,028,609
Mega AMERIPRISE FINANCIAL INC $72,312,719 1.52% 991,808
Mega Fisher Asset Management, LLC $71,478,557 1.50% 980,367
Mid SEGALL BRYANT & HAMILL, LLC $68,158,017 1.43% 934,824
Mega NEUBERGER BERMAN GROUP LLC $66,378,575 1.39% 910,418
Mega FMR LLC $65,886,431 1.38% 903,668
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $62,662,280 1.31% 859,447
Mega VAN ECK ASSOCIATES CORP $62,056,981 1.30% 851,145
Mega RAYMOND JAMES FINANCIAL INC $57,892,652 1.21% 794,029
Mega WELLINGTON MANAGEMENT GROUP LLP $55,085,326 1.16% 755,525
Mega JENNISON ASSOCIATES LLC $50,170,391 1.05% 688,114
Mega MORGAN STANLEY $48,946,735 1.03% 671,331
Large LOOMIS SAYLES & CO L P $47,094,901 0.99% 645,932
Large BAMCO INC /NY/ $47,031,762 0.99% 645,066
Large LORD, ABBETT & CO. LLC $46,842,196 0.98% 642,466
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $46,368,572 0.97% 635,970
Large VOYA INVESTMENT MANAGEMENT LLC $44,420,854 0.93% 609,256
Mid EMERALD ADVISERS, LLC $43,404,343 0.91% 595,314
Mid KENNEDY CAPITAL MANAGEMENT LLC $42,962,144 0.90% 589,249
Mega AMERICAN CENTURY COMPANIES INC $42,498,874 0.89% 582,895
Mid SNYDER CAPITAL MANAGEMENT L P $42,335,483 0.89% 580,654
Large Allspring Global Investments Holdings, LLC $41,810,675 0.88% 573,456
Mega NORTHERN TRUST CORP Bank $39,959,271 0.84% 548,063
Mega ROYAL BANK OF CANADA Bank $38,838,206 0.81% 532,687
Mega FRANKLIN RESOURCES INC $33,074,380 0.69% 453,633
Large BESSEMER GROUP INC $32,786,819 0.69% 449,689
Mid OBERWEIS ASSET MANAGEMENT INC/ $28,509,486 0.60% 391,023
Mid EMERALD MUTUAL FUND ADVISERS TRUST Mutual Fund $27,375,663 0.57% 375,472
Large SEI INVESTMENTS CO $27,049,026 0.57% 370,992
Large Artisan Partners Limited Partnership $25,829,461 0.54% 354,265
Mega VANGUARD FIDUCIARY TRUST CO Bank $25,461,994 0.53% 349,225
Large WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC $23,862,568 0.50% 327,288
Mega Bank of New York Mellon Corp Bank $22,922,827 0.48% 314,399
Large SILVERCREST ASSET MANAGEMENT GROUP LLC $22,614,348 0.47% 310,168
Large MetLife Investment Management, LLC $21,562,330 0.45% 295,739
Mega BANK OF AMERICA CORP /DE/ Bank $21,502,470 0.45% 294,918
Large Driehaus Capital Management LLC $21,481,327 0.45% 294,628
Mega CITADEL ADVISORS LLC $21,352,859 0.45% 292,866
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $21,037,451 0.44% 288,540
Large FIFTH THIRD BANCORP Bank $19,474,333 0.41% 267,101
Mid Aristotle Capital Boston, LLC $19,424,463 0.41% 266,417
Mega PRINCIPAL FINANCIAL GROUP INC $18,745,160 0.39% 257,100
Mega JPMORGAN CHASE & CO $18,073,439 0.38% 247,887
Mega UBS Group AG $16,993,204 0.36% 233,071
Mega Nuveen, LLC $16,899,370 0.35% 231,784
Mega VICTORY CAPITAL MANAGEMENT INC $16,449,808 0.35% 225,618
Mid ROYCE & ASSOCIATES LP $16,038,741 0.34% 219,980
Large WCM INVESTMENT MANAGEMENT, LLC $15,990,912 0.34% 219,324
Mid MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC $15,438,838 0.32% 211,752
Mid AXIOM INVESTORS LLC /DE $15,388,967 0.32% 211,068
Large KING LUTHER CAPITAL MANAGEMENT CORP $15,313,797 0.32% 210,037
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $14,117,344 0.30% 193,627
Large Public Sector Pension Investment Board Pension $13,777,073 0.29% 188,960
Mega TWO SIGMA INVESTMENTS, LP $11,816,450 0.25% 162,069
Mega BNP PARIBAS ARBITRAGE, SA $11,328,755 0.24% 155,380
Small Freshford Capital Management, LLC $11,232,878 0.24% 154,065
Mega Legal & General Group Plc $11,056,435 0.23% 151,645
Mega RHUMBLINE ADVISERS $10,556,930 0.22% 144,794
Large Man Group plc $10,551,826 0.22% 144,724
Large Thrivent Financial for Lutherans $10,196,973 0.21% 139,857
Mid PEREGRINE CAPITAL MANAGEMENT LLC $9,928,519 0.21% 136,175
Large Vident Advisory, LLC $9,336,779 0.20% 128,059
Mid Penn Capital Management Company, LLC $9,317,095 0.20% 127,789
Mega DEUTSCHE BANK AG\ Bank $9,302,731 0.20% 127,592
Mega WELLS FARGO & COMPANY/MN $9,020,351 0.19% 123,719
Micro Heights Point Management, LP $8,887,583 0.19% 121,898
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $8,470,096 0.18% 116,172
Large Qube Research & Technologies Ltd $8,106,862 0.17% 111,190
Large Russell Investments Group, Ltd. $8,047,219 0.17% 110,372
Small AGMAN CAPITAL LLC $7,920,359 0.17% 108,632
Mega Swiss National Bank Bank $7,794,079 0.16% 106,900
Small Archon Capital Management LLC $6,985,798 0.15% 95,814
Mid Edgestream Partners, L.P. $6,431,245 0.13% 88,208
Large Select Equity Group, L.P. $6,085,506 0.13% 83,466
Large BLAIR WILLIAM & CO/IL $5,744,651 0.12% 78,791
Large STATE OF WISCONSIN INVESTMENT BOARD $5,577,979 0.12% 76,505
Mid Penserra Capital Management LLC $5,009,863 0.11% 68,713
Mega AQR CAPITAL MANAGEMENT LLC $4,905,382 0.10% 67,280
Large Quantinno Capital Management LP $4,810,383 0.10% 65,977
Mega NORDEA INVESTMENT MANAGEMENT AB $4,695,548 0.10% 64,402
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $4,634,888 0.10% 63,570
Mega ALLIANCEBERNSTEIN L.P. $4,434,094 0.09% 60,816
Large Cerity Partners LLC $4,430,229 0.09% 60,763
Micro 13D Management LLC $4,408,284 0.09% 60,462
Small Candelo Capital Management LP $4,408,138 0.09% 60,460
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $4,228,780 0.09% 58,000
Mega BARCLAYS PLC $4,215,800 0.09% 57,822
Small DEEPWATER ASSET MANAGEMENT, LLC $4,128,455 0.09% 56,624

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