Mirion Technologies
MIR
351 hedge funds and large institutions have $4.7B invested in Mirion Technologies in 2026 Q2 according to their latest regulatory filings, with 60 funds opening new positions, 137 increasing their positions, 117 reducing their positions, and 65 closing their positions.
746% more call options, than puts
Call options by funds: $132M | Put options by funds: $15.6M
17% more repeat investments, than reductions
Existing positions increased: 137 | Existing positions reduced: 117
3.47% more ownership
Funds ownership: 103.61% → 107.08% (+3.5%)
0% less capital invested
Capital invested by funds: $4.71B → $4.7B (-$19.7M)
8% less first-time investments, than exits
New positions opened: 60 | Existing positions closed: 65
3% less funds holding
Funds holding: 362 → 351 (-11)
17% less funds holding in top 10
Funds holding in top 10: 6 → 5 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Alyeska Investment Group
Chicago,
Illinois
|
+$127M |
| 2 |
CAM
Congress Asset Management
Boston,
Massachusetts
|
+$103M |
| 3 |
Goldman Sachs
New York
|
+$56.7M |
| 4 |
BAMCO Inc
New York
|
+$49.9M |
| 5 |
MC
Maverick Capital
Dallas,
Texas
|
+$48.1M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Millennium Management
New York
|
-$76.3M |
| 2 |
Bank of New York Mellon
New York
|
-$58.5M |
| 3 |
TCCM
Two Creeks Capital Management
New York
|
-$45.5M |
| 4 |
Citadel Advisors
Miami,
Florida
|
-$33.2M |
| 5 |
AllianceBernstein
Nashville,
Tennessee
|
-$24.5M |
MIR Hedge Fund Activity: Q2 2026 in Review
351 of the 8,305 institutional investors tracked by Wall St. Rank reported a position in Mirion Technologies (MIR) for Q2 2026, worth a combined $4.7B — down 0.42% from $4.71B a quarter earlier.
Sellers outnumbered buyers: 65 funds closed out of MIR and 60 opened new positions — a net loss of 5 holders — while 117 trimmed existing stakes and 137 added.
The largest buyer was Alyeska Investment Group, adding an estimated $127M. The largest seller was Millennium Management, cutting an estimated $76.3M.
- 351 institutional investors held Mirion Technologies (MIR) as of Q2 2026, down from 362 in Q1 2026.
- Funds reported $4.7B of Mirion Technologies stock for Q2 2026, down 0.42% quarter-over-quarter.
- 60 funds opened new Mirion Technologies positions in Q2 2026 and 65 closed out, a net change of -5 holders.
- The largest Mirion Technologies buyer in Q2 2026 was Alyeska Investment Group, an estimated $127M added.
- The largest Mirion Technologies seller in Q2 2026 was Millennium Management, an estimated $76.3M sold.
Based on aggregated 13F filings for Q2 2026.