MRCY Mercury Systems, Inc.
Mercury Systems, Inc. (MRCY) Institutional Ownership
What the institutions did with MRCY last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeOwnership map
Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 9.4M | 14.3% |
| JANA Partners Management, LP | 4.0M | 6.0% |
| STATE STREET CORP | 3.4M | 5.2% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3.0M | 4.6% |
| Invesco Ltd. | 2.7M | 4.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.4M | 3.7% |
| FMR LLC | 1.8M | 2.8% |
| T. Rowe Price Investment Management, Inc. | 1.6M | 2.4% |
| GOLDMAN SACHS GROUP INC | 1.6M | 2.4% |
| Conestoga Capital Advisors, LLC | 1.5M | 2.3% |
| GEODE CAPITAL MANAGEMENT, LLC | 1.5M | 2.2% |
| FIRST TRUST ADVISORS LP | 1.3M | 2.0% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 1.3M | 2.0% |
| DIMENSIONAL FUND ADVISORS LP | 1.2M | 1.8% |
| SEGALL BRYANT & HAMILL, LLC | 1.0M | 1.6% |
| Fisher Asset Management, LLC | 944.1K | 1.4% |
| FRANKLIN RESOURCES INC | 846.7K | 1.3% |
| NEUBERGER BERMAN GROUP LLC | 841.6K | 1.3% |
| MORGAN STANLEY | 811.6K | 1.2% |
| WELLINGTON MANAGEMENT GROUP LLP | 775.5K | 1.2% |
| VAN ECK ASSOCIATES CORP | 763.0K | 1.2% |
| RAYMOND JAMES FINANCIAL INC | 748.8K | 1.1% |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 716.0K | 1.1% |
| LOOMIS SAYLES & CO L P | 681.1K | 1.0% |
| AMERICAN CENTURY COMPANIES INC | 665.0K | 1.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| FMR LLC | Increased | 903.7K | 1.8M | +938.4K |
| AMERIPRISE FINANCIAL INC | Reduced | 991.8K | 499.2K | -492.6K |
| AMERICAN CAPITAL MANAGEMENT INC | New | 0 | 486.1K | +486.1K |
| BlackRock, Inc. | Increased | 8.9M | 9.4M | +450.6K |
| STATE STREET CORP | Reduced | 3.9M | 3.4M | -447.4K |
| Conestoga Capital Advisors, LLC | Reduced | 1.9M | 1.5M | -431.4K |
| FRANKLIN RESOURCES INC | Increased | 453.6K | 846.7K | +393.1K |
| GOLDMAN SACHS GROUP INC | Increased | 1.2M | 1.6M | +374.6K |
| JENNISON ASSOCIATES LLC | Reduced | 688.1K | 354.9K | -333.2K |
| CITADEL ADVISORS LLC | Sold Out | 292.9K | 0 | -292.9K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 1.0M | 1.3M | +257.0K |
| Invesco Ltd. | Increased | 2.4M | 2.7M | +227.9K |
| VOYA INVESTMENT MANAGEMENT LLC | Reduced | 609.3K | 410.1K | -199.2K |
| Driehaus Capital Management LLC | Increased | 294.6K | 487.9K | +193.3K |
| Swedbank AB | Increased | 55.3K | 244.3K | +189.0K |
| JANA Partners Management, LP | Reduced | 4.1M | 4.0M | -148.6K |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | Reduced | 288.5K | 142.0K | -146.5K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | Reduced | 859.4K | 716.0K | -143.5K |
| MORGAN STANLEY | Increased | 671.3K | 811.6K | +140.2K |
| ROYAL BANK OF CANADA | Reduced | 532.7K | 394.1K | -138.6K |
| FIRST TRUST ADVISORS LP | Increased | 1.2M | 1.3M | +138.2K |
| Penn Capital Management Company, LLC | Sold Out | 127.8K | 0 | -127.8K |
| MetLife Investment Management, LLC | Reduced | 295.7K | 173.5K | -122.2K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 2.9M | 3.0M | +120.6K |
| JANE STREET GROUP, LLC | New | 0 | 115.3K | +115.3K |
| DF DENT & CO INC | New | 0 | 113.6K | +113.6K |
| Qube Research & Technologies Ltd | Sold Out | 111.2K | 0 | -111.2K |
| SEI INVESTMENTS CO | Reduced | 371.0K | 261.7K | -109.3K |
| Allspring Global Investments Holdings, LLC | Reduced | 573.5K | 474.9K | -98.6K |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | New | 0 | 98.1K | +98.1K |
| SEGALL BRYANT & HAMILL, LLC | Increased | 934.8K | 1.0M | +94.7K |
| TWO SIGMA INVESTMENTS, LP | Reduced | 162.1K | 71.9K | -90.2K |
| VAN ECK ASSOCIATES CORP | Reduced | 851.1K | 763.0K | -88.2K |
| Archon Capital Management LLC | Reduced | 95.8K | 10.9K | -84.9K |
| AMERICAN CENTURY COMPANIES INC | Increased | 582.9K | 665.0K | +82.1K |
| Select Equity Group, L.P. | Increased | 83.5K | 165.3K | +81.8K |
| BANK OF AMERICA CORP /DE/ | Reduced | 294.9K | 223.5K | -71.4K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 1.2M | 1.2M | -71.3K |
| NEUBERGER BERMAN GROUP LLC | Reduced | 910.4K | 841.6K | -68.9K |
| Thrivent Financial for Lutherans | Increased | 139.9K | 207.0K | +67.2K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 1.5M | 1.5M | -66.1K |
| NEW YORK STATE COMMON RETIREMENT FUND | Reduced | 193.6K | 133.2K | -60.4K |
| Freshford Capital Management, LLC | Reduced | 154.1K | 93.8K | -60.3K |
| JPMORGAN CHASE & CO | Reduced | 247.9K | 193.5K | -54.4K |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Increased | 327.3K | 379.7K | +52.4K |
| Edgestream Partners, L.P. | Reduced | 88.2K | 37.1K | -51.1K |
| NORTHERN TRUST CORP | Increased | 548.1K | 597.8K | +49.7K |
| Informed Momentum Co LLC | New | 0 | 47.9K | +47.9K |
| RAYMOND JAMES FINANCIAL INC | Reduced | 794.0K | 748.8K | -45.2K |
| Nuveen, LLC | Reduced | 231.8K | 186.6K | -45.2K |
| FIFTH THIRD BANCORP | Reduced | 267.1K | 222.4K | -44.7K |
| EMERALD ADVISERS, LLC | Increased | 595.3K | 638.7K | +43.4K |
| UBS Group AG | Increased | 233.1K | 274.8K | +41.7K |
| ExodusPoint Capital Management, LP | Sold Out | 39.2K | 0 | -39.2K |
| BAMCO INC /NY/ | Reduced | 645.1K | 606.9K | -38.1K |
| EMERALD MUTUAL FUND ADVISERS TRUST | Increased | 375.5K | 412.4K | +36.9K |
| HWG Holdings LP | New | 0 | 36.6K | +36.6K |
| Fisher Asset Management, LLC | Reduced | 980.4K | 944.1K | -36.3K |
| LOOMIS SAYLES & CO L P | Increased | 645.9K | 681.1K | +35.2K |
| Man Group plc | Reduced | 144.7K | 110.6K | -34.1K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.