MRCY Institutional Ownership
Who owns Mercury Systems Inc and what the big funds did with it last quarter, from every SEC 13F filing. 392 funds reported holding MRCY at Jun 30, 2026, together owning 109.1% of the company.
- ▲211 buying vs 173 selling
- ▲Held by funds +0.8 pts
- ▲Funds holding +35
- ▼Superinvestors: 0 added, 2 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 392 | 357 | +9.8% |
| In funds' top 10 | 12 | 8 | +50.0% |
| 13F shares | 65.6M | 65.2M | +0.7% |
| Held by funds | 109.1% | 108.4% | +0.8 pts |
| New positions | 83 | 51 | +62.7% |
| Increased | 128 | 133 | −3.8% |
| Reduced | 129 | 121 | +6.6% |
| Sold out | 44 | 42 | +4.8% |
| Calls (shares) | 35K | 6,600 | +431.8% |
| Puts (shares) | 36K | 5,600 | +550.0% |
| Put/call ratio | 1.04 | 0.85 | +22.2% |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in MRCY
All superinvestors →
Who owns MRCY
share of fund held shares- Index and passive funds41.8%
- Active managers and hedge funds46.6%
- Banks and brokers10.3%
- Pensions, insurers and other1.3%
The top 10 holders own 47.8% of all MRCY shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
95 funds changed their position- Conestoga Capital Advisors, LLCTrimmed−297K sh
- Swedbank ABTrimmed−71K sh
- HWG Holdings LPSold out−37K sh
- Calamos Advisors LLCTrimmed−25K sh
- Creative PlanningAdded+17K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 15.58% | 9.4M | $1.1B | +451K |
| 2 | JANA Partners Management, LP | 6.58% | 4M | $484M | −149K |
| 3 | State Street Corp | 5.68% | 3.4M | $418M | −447K |
| 4 | Vanguard Portfolio Management LLC | 5.04% | 3M | $371M | +121K |
| 5 | Invesco Ltd. | 4.44% | 2.7M | $327M | +228K |
| 6 | Vanguard Capital Management LLC | 4.03% | 2.4M | $296M | +19K |
| 7 | Fmr LLC | 3.06% | 1.8M | $225M | +938K |
| 8 | T. Rowe Price Investment Management, Inc. | 2.65% | 1.6M | $195M | +16K |
| 9 | Goldman Sachs Group Inc | 2.62% | 1.6M | $193M | +375K |
| 10 | Conestoga Capital Advisors, LLC | 2.47% | 1.5M | $182M | −431K |
- Fmr LLC+938K sh+$115M
- American Capital Management Inc+486K sh+$59.5M
- BlackRock, Inc.+451K sh+$55.1M
- Franklin Resources Inc+393K sh+$48.1M
- Goldman Sachs Group Inc+375K sh+$45.8M
- Price T Rowe Associates Inc /md/+257K sh+$31.4M
- Invesco Ltd.+228K sh+$27.9M
- Driehaus Capital Management LLC+193K sh+$23.6M
- Ameriprise Financial Inc−493K sh−$60.3M
- State Street Corp−447K sh−$54.7M
- Conestoga Capital Advisors, LLC−431K sh−$52.8M
- Jennison Associates LLC−333K sh−$40.8M
- Voya Investment Management LLC−199K sh−$24.4M
- Citadel Advisors LLC−293K sh−$21.4M
- JANA Partners Management, LP−149K sh−$18.2M
- Nomura Asset Management International Inc.−147K sh−$17.9M
MRCY institutional ownership FAQ
Who owns the most MRCY stock?
In Q2 2026 13F filings the largest holder of MRCY was BlackRock, Inc., followed by JANA Partners Management, LP and State Street Corp. Index fund managers are usually the biggest holders of large companies.
What percentage of MRCY is owned by institutions?
Funds that file 13F reports held 109.1% of MRCY's shares at Jun 30, 2026, compared with 108.4% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying MRCY?
In Q2 2026, 211 funds bought MRCY (83 of them new positions) and 173 sold (44 sold out completely). Among well known investors, 0 added and 2 cut. Our fund sentiment for MRCY is bullish.
What is MRCY's institutional put/call ratio?
Funds reported $4.5M of MRCY puts against $4.3M of calls, a put/call ratio of 1.04 (0.85 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this MRCY ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.