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Mirion Technologies
MIR

Overview Fund Activity

299 hedge funds and large institutions have $4.46B invested in Mirion Technologies in 2025 Q2 according to their latest regulatory filings, with 100 funds opening new positions, 115 increasing their positions, 62 reducing their positions, and 29 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
299
Holders Change
+70
Holders Change %
+30.57%
% of All Funds
4.01%
Holding in Top 10
6
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-14.29%
% of All Funds
0.08%
New
100
Increased
115
Reduced
62
Closed
29
Calls
$72.9M
Puts
$50.8M
Net Calls
+$22.1M
Net Calls Change
+$5.79M

Top Buyers

1
Massachusetts Financial Services
Massachusetts Financial Services
Massachusetts
$82.5M
2
Invesco
Invesco
Georgia
$56.3M
3
DCM
Driehaus Capital Management
Illinois
$43.2M
4
Royal Bank of Canada
Royal Bank of Canada
Ontario, Canada
$36.9M
5
Loomis, Sayles & Company
Loomis, Sayles & Company
Massachusetts
$34.3M

Top Sellers

1
MC
Maverick Capital
Texas
$114M
2
Swedbank
Swedbank
Sweden
$88.8M
3
William Blair Investment Management
William Blair Investment Management
Illinois
$21.7M
4
ACM
Arosa Capital Management
Florida
$3.88M
5
MCM
Masters Capital Management
Georgia
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
MCM
301
Masters Capital Management
Georgia
– -$14.5M -1,000,000 Closed
TI
302
Trexquant Investment
Connecticut
– -$8.23M -567,609 Closed
Tudor Investment Corp
303
Tudor Investment Corp
Connecticut
– -$6.25M -430,949 Closed
BAM
304
Bastion Asset Management
Canada
– -$4.89M -326,580 Closed
AIMCA
305
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
– -$2.62M -180,520 Closed
DFCM
306
Dark Forest Capital Management
Puerto Rico
– -$2.2M -151,996 Closed
HF
307
HRT Financial
New York
– -$2.1M -145,133 Closed
Squarepoint
308
Squarepoint
New York
– -$1.56M -107,363 Closed
CF
309
Corebridge Financial
Texas
– -$1.47M -101,203 Closed
ACM
310
Aquatic Capital Management
Illinois
– -$1.42M -97,996 Closed
First Manhattan
311
First Manhattan
New York
– -$1.12M -76,932 Closed
XT
312
XTX Topco
Cayman Islands
– -$1M -69,269 Closed
VRS
313
Virginia Retirement Systems
Virginia
– -$689K -47,546 Closed
EGM
314
Engineers Gate Manager
New York
– -$497K -34,303 Closed
CCIA
315
Campbell & Co Investment Adviser
Maryland
– -$485K -33,425 Closed
PP
316
PDT Partners
New York
– -$333K -22,969 Closed
DC
317
Diametric Capital
Massachusetts
– -$198K -13,679 Closed
TSS
318
Two Sigma Securities
New York
– -$166K -11,427 Closed
SM
319
Sciencast Management
New Jersey
– -$152K -10,508 Closed
BAMF
320
BI Asset Management Fondsmaeglerselskab
Denmark
– -$68K -4,676 Closed
QCG
321
Quadrant Capital Group
Ohio
– -$11.8K -817 Closed
Optiver Holding
322
Optiver Holding
Netherlands
– -$10.7K -736 Closed
GFPC
323
Global Financial Private Client
Florida
– -$7.16K -494 Closed
SO
324
Sierra Ocean
California
– -$4.66K -321 Closed
MEG
325
Millstone Evans Group
Colorado
– -$3.89K -268 Closed
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