Mercury Systems (MRCY) Superinvestor holders
20 of the superinvestors we track hold Mercury Systems (MRCY) in their latest 13F filings, $1.0B in total.
Summary
The largest holder is Barry Rosenstein (JANA Partners), with $484M, 25.5% of the portfolio.
In their latest quarter: 4 opened a new position, 5 added, 11 trimmed.
Who holds it
Each investor's latest 13F filing, largest stake first. What a 13F shows.
| Investor | Last change | Shares | Value | % of portfolio | Filed for |
|---|---|---|---|---|---|
| Barry Rosenstein JANA Partners |
Trimmed | 3,958,849 | $484M | 25.5% | Q2 2026 |
| Conestoga Conestoga Capital Advisors |
Trimmed | 1,190,557 | $99M | 3.0% | Q3 2026 |
| Aziz Hamzaogullari Loomis Sayles & Co |
Added | 681,142 | $83M | 0.1% | Q2 2026 |
| Ron Baron Baron Capital (BAMCO) |
Trimmed | 606,919 | $74M | 0.1% | Q2 2026 |
| Ken Fisher Fisher Investments |
Trimmed | 874,874 | $73M | 0.0% | Q3 2026 |
| Artisan Partners | Added | 372,818 | $46M | 0.1% | Q2 2026 |
| Jennison Associates | Trimmed | 354,894 | $43M | 0.0% | Q2 2026 |
| WCM Investment Management | Trimmed | 219,320 | $24M | 0.0% | Q2 2026 |
| George Loening Select Equity Group |
Added | 165,257 | $20M | 0.1% | Q2 2026 |
| Chuck Royce Royce Investment Partners |
Trimmed | 220,538 | $18M | 0.2% | Q3 2026 |
| Man Group Man Group plc |
Trimmed | 110,597 | $14M | 0.0% | Q2 2026 |
| Two Sigma Two Sigma Investments |
Trimmed | 71,861 | $9M | 0.0% | Q2 2026 |
| David Shaw D. E. Shaw & Co. |
Added | 61,830 | $8M | 0.0% | Q2 2026 |
| Cliff Asness AQR Capital Management |
Trimmed | 55,158 | $6M | 0.0% | Q2 2026 |
| Ken Tropin Graham Capital Management |
New position | 9,800 | $1M | 0.0% | Q2 2026 |
| Alan Howard Brevan Howard |
New position | 8,707 | $1M | 0.0% | Q2 2026 |
| Joel Greenblatt Gotham Asset Management |
Added | 6,835 | $836,126 | 0.0% | Q2 2026 |
| Ensign Peak Ensign Peak Advisors |
Trimmed | 3,652 | $446,749 | 0.0% | Q2 2026 |
| Dan Davidowitz Polen Capital Management |
New position | 2,904 | $355,246 | 0.0% | Q2 2026 |
| Alec Litowitz Magnetar Capital |
New position | 1,848 | $226,066 | 0.0% | Q2 2026 |
Holders by quarter
| Quarter | Superinvestors holding it |
|---|---|
| Q2 2026 | 20 |
| Q1 2026 | 17 |
| Q4 2025 | 20 |
| Q3 2025 | 15 |
| Q2 2025 | 17 |
| Q1 2025 | 17 |
| Q4 2024 | 13 |
| Q3 2024 | 12 |
Questions about Mercury Systems
Which superinvestors own Mercury Systems?
20 of the superinvestors we track hold Mercury Systems (MRCY) in their latest 13F filings, $1.0B in total. Barry Rosenstein, Conestoga, Aziz Hamzaogullari, Ron Baron, Ken Fisher, Artisan Partners.
Who is the largest superinvestor holder of MRCY?
The largest holder is Barry Rosenstein (JANA Partners), with $484M, 25.5% of the portfolio.
From Mercury Systems's annual reports filed with the SEC (XBRL data), standardised by Investingly. Information only, not investment advice.