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MIR · Mirion Technologies, Inc.

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Market Cap
$4.22B
Shares
249.04M

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: 354
Total Value: $4,802,150,043
Total Shares: 267,827,679
Showing 1–100 of 371 holdings by value · page 1 of 4

Institutional Ownership Trend

24 quarters

Holder Concentration

Across 354 13F filers · Δ vs Mar 31, 2026
Top Holder
14.3%
Sep 2023 → Jun 2026 · range 11.3% – 19.2%
−0.5 pts
Top 5
34.3%
Sep 2023 → Jun 2026 · range 34.3% – 54.3%
−0.9 pts
Top 10
49.9%
Sep 2023 → Jun 2026 · range 48.3% – 73.3%
+1.6 pts
HHI
399
Sep 2023 → Jun 2026 · range 395 – 789
Broadly held−1

Quarterly Activity

vs Mar 31, 2026
New
61
Increased
143
Decreased
115
Sold Out
73
Unchanged
35
Holder count: -12
Institutional value: +0.6%
Shares held: +4.3%

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 371
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1809987 CUSIP 60471A101 13F (30d) 239 filings 239 filers Visit website Investor relations