Mirion Technologies
231 hedge funds and large institutions have $2.77B invested in Mirion Technologies in 2025 Q1 according to their latest regulatory filings, with 46 funds opening new positions, 94 increasing their positions, 67 reducing their positions, and 39 closing their positions.
2,371% more call options, than puts
Call options by funds: $17M | Put options by funds: $689K
40% more repeat investments, than reductions
Existing positions increased: 94 | Existing positions reduced: 67
18% more first-time investments, than exits
New positions opened: 46 | Existing positions closed: 39
17% more funds holding in top 10
Funds holding in top 10: 6 → 7 (+1)
3% more funds holding
Funds holding: 224 → 231 (+7)
1.61% less ownership
Funds ownership: 86% → 84.39% (-1.6%)
18% less capital invested
Capital invested by funds: $3.38B → $2.77B (-$617M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
MC
Maverick Capital
Dallas,
Texas
|
+$29.5M |
| 2 |
Brown Advisory
Baltimore,
Maryland
|
+$27.5M |
| 3 |
American Century Companies
Kansas City,
Missouri
|
+$16.5M |
| 4 |
Victory Capital Management
San Antonio,
Texas
|
+$15.4M |
| 5 |
Rockefeller Capital Management
New York
|
+$14.7M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Goldman Sachs
New York
|
-$130M |
| 2 |
Arrowstreet Capital
Boston,
Massachusetts
|
-$22.4M |
| 3 |
William Blair Investment Management
Chicago,
Illinois
|
-$20.6M |
| 4 |
MP
Munro Partners
Melbourne,
Australia
|
-$19.6M |
| 5 |
Fidelity International
Hamilton,
Bermuda
|
-$18.9M |
MIR Hedge Fund Activity: Q1 2025 in Review
231 of the 7,459 institutional investors tracked by Wall St. Rank reported a position in Mirion Technologies (MIR) for Q1 2025, worth a combined $2.77B — down 18% from $3.38B a quarter earlier.
Buyers outnumbered sellers: 46 funds opened new MIR positions and 39 closed out — a net gain of 7 holders — while 94 added to existing stakes and 67 trimmed.
The largest buyer was Maverick Capital, adding an estimated $29.5M. The largest seller was Goldman Sachs, cutting an estimated $130M.
- 231 institutional investors held Mirion Technologies (MIR) as of Q1 2025, up from 224 in Q4 2024.
- Funds reported $2.77B of Mirion Technologies stock for Q1 2025, down 18% quarter-over-quarter.
- 46 funds opened new Mirion Technologies positions in Q1 2025 and 39 closed out, a net change of +7 holders.
- The largest Mirion Technologies buyer in Q1 2025 was Maverick Capital, an estimated $29.5M added.
- The largest Mirion Technologies seller in Q1 2025 was Goldman Sachs, an estimated $130M sold.
Based on aggregated 13F filings for Q1 2025.