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MRCY · Mercury Systems Inc

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$87.74 -1.85 (-2.06%) At close · Aug 25
Market Cap
$5.45B
Shares
60.14M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 395
Total Value: $8,051,255,031
Total Shares: 65,821,731

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 395 13F filers · Δ vs Mar 31, 2026
Top Holder
14.2%
Sep 2023 → Jun 2026 · range 11.8% – 14.2%
+0.6 pts
Top 5
34.1%
Sep 2023 → Jun 2026 · range 34.0% – 49.9%
+0.1 pts
Top 10
47.7%
Sep 2023 → Jun 2026 · range 47.3% – 63.5%
+0.4 pts
HHI
389
Sep 2023 → Jun 2026 · range 376 – 606
Broadly held+13

Quarterly Activity

vs Mar 31, 2026
New
87
Increased
130
Decreased
132
Sold Out
50
Unchanged
46
Holder count: +37
Institutional value: +68.9%
Shares held: +0.7%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 406
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1049521 CUSIP 589378108 13F (30d) 362 filings 335 filers Visit website Investor relations