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Who owns Mercury Systems (MRCY) stock

360 funds reported Mercury Systems (MRCY) shares in their latest 13F filings, worth $8.1B in all. The largest holder is BlackRock ($1.1B). Last quarter 187 funds added to their stakes and 160 cut them.

Largest holders of MRCY (13F)Largest holders of MRCY (13F)BlackRock$1.1BJana Partners Management, LP$484MState Street$418MVanguard Group$411MVanguard Portfolio Management LLC$371MInvesco$327MVanguard Capital Management LLC$296MFMR LLC$225MT. Rowe Price Investment Manageme…$195MGoldman Sachs Group$193M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock9,370,902$1.1Bincrease2026-06-30
Jana Partners Management, LP3,958,849$484Mdecrease2026-06-30
State Street3,418,290$418Mdecrease2026-06-30
Vanguard Group5,632,049$411Mdecrease2025-12-31
Vanguard Portfolio Management LLC3,031,459$371Mincrease2026-06-30
Invesco2,669,450$327Mincrease2026-06-30
Vanguard Capital Management LLC2,422,629$296Mincrease2026-06-30
FMR LLC1,842,103$225Mincrease2026-06-30
T. Rowe Price Investment Management1,595,711$195Mincrease2026-06-30
Goldman Sachs Group1,575,727$193Mincrease2026-06-30
Geode Capital Management, LLC1,459,574$179Mdecrease2026-06-30
First Trust Advisors LP1,298,957$159Mincrease2026-06-30
Price T Rowe Associates1,285,569$157Mincrease2026-06-30
Dimensional Fund Advisors LP1,156,682$141Mdecrease2026-06-30
Fisher Asset Management, LLC944,069$115Mdecrease2026-06-30

Mercury Systems' latest quarter

Mercury Systems, Q4 FY26: revenue $290M (+6% year over year), operating margin 5.0%, net earnings $798K, operating cash flow $42.2M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most MRCY stock?

By the latest 13F filings: BlackRock ($1.1B); Jana Partners Management, LP ($484M); State Street ($418M); Vanguard Group ($411M); Vanguard Portfolio Management LLC ($371M).

What is the short interest in MRCY?

5,556,601 shares were sold short at the 2026-10-15 settlement, 10.83% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.