MERCURY SYSTEMS INC (MRCY) Institutional Shareholders
MERCURY SYSTEMS INC (MRCY) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $4.37B in MRCY holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of MRCY tracked by InsiderSet, reporting ownership valued at approximately $650.38M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $866.16M, representing an estimated gain of +33.18% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 52% of the total disclosed MRCY value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Jana Partners Management, Lp, State Street Corp, and several other long-term asset managers with concentrated positions in MERCURY SYSTEMS INC (MRCY).
This page ranks the largest institutional MRCY shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
357
Total Reported Value
$4.37B
Largest Holder
Blackrock, Inc.
Largest Position
$650.38M
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
74
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 8,920,325 | $650,380,862 | $866,163,558 | +$215,782,696 | +33.18% | |
| Jana Partners Management, Lp | 18.65% | 4,107,424 | $299,472,284 | $398,830,870 | +$99,358,586 | +33.18% | |
| State Street Corp | 0.01% | 3,865,719 | $281,849,572 | $375,361,315 | +$93,511,743 | +33.18% | |
| Vanguard Portfolio Management Llc | 0.01% | 2,910,904 | $212,234,011 | $282,648,778 | +$70,414,767 | +33.18% | |
| Conestoga Capital Advisors, Llc | 3.96% | 1,487,191 | $181,928,075 | $144,406,246 | -$37,521,829 | -20.62% | |
| Invesco Ltd. | 0.03% | 2,441,578 | $178,015,453 | $237,077,224 | +$59,061,771 | +33.18% | |
| Vanguard Capital Management Llc | 0.00% | 2,403,818 | $175,262,370 | $233,410,728 | +$58,148,358 | +33.18% | |
| Geode Capital Management, Llc | 0.01% | 1,525,716 | $111,257,977 | $148,147,024 | +$36,889,047 | +33.16% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,227,975 | $89,518,765 | $119,236,373 | +$29,717,608 | +33.20% | |
| Goldman Sachs Group Inc | 0.01% | 1,201,112 | $87,573,077 | $116,627,975 | +$29,054,898 | +33.18% | |
| First Trust Advisors Lp | 0.06% | 1,160,775 | $84,632,105 | $112,711,253 | +$28,079,148 | +33.18% | |
| Ameriprise Financial Inc | 0.02% | 991,808 | $72,312,870 | $96,304,557 | +$23,991,687 | +33.18% | |
| Fisher Asset Management, Llc | 0.02% | 980,367 | $71,478,621 | $95,193,636 | +$23,715,015 | +33.18% | |
| Neuberger Berman Group Llc | 0.05% | 910,418 | $66,256,335 | $88,401,588 | +$22,145,253 | +33.42% | |
| Fmr Llc | 0.00% | 903,668 | $65,886,385 | $87,746,163 | +$21,859,778 | +33.18% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.08% | 859,447 | $62,662,281 | $83,452,304 | +$20,790,023 | +33.18% | |
| Wellington Management Group Llp | 0.01% | 755,525 | $55,085,328 | $73,361,478 | +$18,276,150 | +33.18% | |
| Jennison Associates Llc | 0.03% | 688,114 | $50,170,391 | $66,815,869 | +$16,645,478 | +33.18% | |
| Morgan Stanley | 0.00% | 671,331 | $48,946,783 | $65,186,240 | +$16,239,457 | +33.18% | |
| Loomis Sayles & Co L P | 0.06% | 645,932 | $47,094,902 | $62,719,997 | +$15,625,095 | +33.18% | |
| Bamco Inc | 0.14% | 645,066 | $47,031,762 | $62,635,909 | +$15,604,147 | +33.18% | |
| Charles Schwab Investment Management Inc | 0.01% | 635,970 | $46,368,573 | $61,752,687 | +$15,384,114 | +33.18% | |
| Voya Investment Management Llc | 0.05% | 609,256 | $44,420,855 | $59,158,758 | +$14,737,903 | +33.18% | |
| Emerald Advisers, Llc | 1.37% | 595,314 | $43,404,344 | $57,804,989 | +$14,400,645 | +33.18% | |
| Kennedy Capital Management Llc | 0.91% | 589,249 | $42,962,145 | $57,216,078 | +$14,253,933 | +33.18% | |
| Allspring Global Investments Holdings, Llc | 0.07% | 573,456 | $42,865,836 | $55,682,578 | +$12,816,742 | +29.90% | |
| American Century Companies Inc | 0.02% | 582,895 | $42,498,874 | $56,599,105 | +$14,100,231 | +33.18% | |
| Snyder Capital Management L P | 0.82% | 580,654 | $42,335,483 | $56,381,503 | +$14,046,020 | +33.18% | |
| Northern Trust Corp | 0.01% | 548,063 | $39,959,272 | $53,216,917 | +$13,257,645 | +33.18% | |
| Royal Bank Of Canada | 0.01% | 532,687 | $38,839,000 | $51,723,908 | +$12,884,908 | +33.18% | |
| Raymond James Financial Inc | 0.01% | 528,034 | $37,687,626 | $51,272,101 | +$13,584,475 | +36.04% | |
| Franklin Resources Inc | 0.01% | 453,633 | $33,074,382 | $44,047,764 | +$10,973,382 | +33.18% | |
| Swedbank Ab | 0.03% | 244,299 | $29,885,097 | $23,721,433 | -$6,163,664 | -20.62% | |
| Oberweis Asset Management Inc/ | 0.84% | 391,023 | $28,509,487 | $37,968,333 | +$9,458,846 | +33.18% | |
| Emerald Mutual Fund Advisers Trust | 1.33% | 375,472 | $27,375,664 | $36,458,331 | +$9,082,667 | +33.18% | |
| Sei Investments Co | 0.02% | 370,992 | $27,049,033 | $36,023,323 | +$8,974,290 | +33.18% | |
| Artisan Partners Limited Partnership | 0.04% | 354,265 | $25,829,461 | $34,399,132 | +$8,569,671 | +33.18% | |
| Vanguard Fiduciary Trust Co | 0.01% | 349,225 | $25,461,995 | $33,909,748 | +$8,447,753 | +33.18% | |
| William Blair Investment Management, Llc | 0.08% | 327,288 | $23,862,568 | $31,779,665 | +$7,917,097 | +33.18% | |
| Bank Of New York Mellon Corp | 0.00% | 314,399 | $22,922,868 | $30,528,143 | +$7,605,275 | +33.18% | |
| Silvercrest Asset Management Group Llc | 0.16% | 310,168 | $22,614,349 | $30,117,313 | +$7,502,964 | +33.18% | |
| Metlife Investment Management, Llc | 0.11% | 295,739 | $21,562,330 | $28,716,257 | +$7,153,927 | +33.18% | |
| Bank Of America Corp | 0.00% | 294,918 | $21,502,472 | $28,636,538 | +$7,134,066 | +33.18% | |
| Driehaus Capital Management Llc | 0.16% | 294,628 | $21,481,327 | $28,608,379 | +$7,127,052 | +33.18% | |
| Citadel Advisors Llc | 0.02% | 292,866 | $21,352,860 | $28,437,289 | +$7,084,429 | +33.18% | |
| Nomura Asset Management International Inc. | 0.04% | 288,540 | $21,037,000 | $28,017,234 | +$6,980,234 | +33.18% | |
| Fifth Third Bancorp | 0.04% | 267,101 | $19,474,307 | $25,935,507 | +$6,461,200 | +33.18% | |
| Aristotle Capital Boston, Llc | 1.21% | 266,417 | $19,462,077 | $25,869,091 | +$6,407,014 | +32.92% | |
| Principal Financial Group Inc | 0.01% | 257,100 | $18,745,161 | $24,964,410 | +$6,219,249 | +33.18% | |
| Ubs Group Ag | 0.00% | 233,071 | $16,993,206 | $22,631,194 | +$5,637,988 | +33.18% |
Frequently asked questions about MRCY
Who owns the most MRCY stock?
The largest holders of MRCY are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MERCURY SYSTEMS INC (MRCY).
Is MRCY widely held by superinvestors?
Many widely followed stocks like MRCY appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MRCY is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.