Who owns MERCURY SYSTEMS INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of MRCY from SEC Form 13F filings across 393 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 393 institutions disclosed 65.6M shares of MERCURY SYSTEMS INC worth $8.02B — about 110.4% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
393
13F holders
$8.02B
value, 2026 filers
110.4%
of shares outstanding (65.6M sh)
87
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of MRCY's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 9.4M | $1.15B | 0.0% | 15.8% | +5.1% |
| 2 | JANA Partners Management, LP | 4.0M | $484.3M | 25.5% | 6.7% | -3.6% |
| 3 | STATE STREET CORP | 3.4M | $418.0M | 0.0% | 5.7% | -11.6% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 3.0M | $370.8M | 0.0% | 5.1% | +4.1% |
| 5 | Invesco Ltd. | 2.7M | $326.6M | 0.0% | 4.5% | +9.3% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 2.4M | $296.4M | 0.0% | 4.1% | +0.8% |
| 7 | FMR LLC | 1.8M | $225.3M | 0.0% | 3.1% | +103.8% |
| 8 | T. Rowe Price Investment Management, Inc. | 1.6M | $195.2M | 0.1% | 2.7% | +1.0% |
| 9 | GOLDMAN SACHS GROUP INC | 1.6M | $192.8M | 0.0% | 2.7% | +31.2% |
| 10 | Conestoga Capital Advisors, LLC | 1.5M | $181.9M | 4.0% | 2.5% | -22.5% |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | 1.5M | $178.6M | 0.0% | 2.5% | -4.3% |
| 12 | FIRST TRUST ADVISORS LP | 1.3M | $158.9M | 0.1% | 2.2% | +11.9% |
| 13 | PRICE T ROWE ASSOCIATES INC /MD/ | 1.3M | $157.3M | 0.0% | 2.2% | +25.0% |
| 14 | DIMENSIONAL FUND ADVISORS LP | 1.2M | $141.4M | 0.0% | 1.9% | -5.8% |
| 15 | SEGALL BRYANT & HAMILL, LLC | 1.0M | $125.9M | 1.5% | 1.7% | +10.1% |
| 16 | Fisher Asset Management, LLC | 944,069 | $115.5M | 0.0% | 1.6% | -3.7% |
| 17 | FRANKLIN RESOURCES INC | 846,732 | $103.6M | 0.0% | 1.4% | +86.7% |
| 18 | NEUBERGER BERMAN GROUP LLC | 841,556 | $102.1M | 0.1% | 1.4% | -7.6% |
| 19 | MORGAN STANLEY | 811,565 | $99.3M | 0.0% | 1.4% | +20.9% |
| 20 | WELLINGTON MANAGEMENT GROUP LLP | 775,502 | $94.9M | 0.0% | 1.3% | +2.6% |
| 21 | VAN ECK ASSOCIATES CORP | 762,994 | $93.3M | 0.1% | 1.3% | -10.4% |
| 22 | RAYMOND JAMES FINANCIAL INC | 748,808 | $91.6M | 0.0% | 1.3% | -5.7% |
| 23 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 715,977 | $87.6M | 0.1% | 1.2% | -16.7% |
| 24 | LOOMIS SAYLES & CO L P | 681,142 | $83.3M | 0.1% | 1.1% | +5.5% |
| 25 | AMERICAN CENTURY COMPANIES INC | 664,960 | $81.3M | 0.0% | 1.1% | +14.1% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.