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Mirion Technologies
MIR

Overview Fund Activity

295 hedge funds and large institutions have $4.42B invested in Mirion Technologies in 2025 Q2 according to their latest regulatory filings, with 99 funds opening new positions, 114 increasing their positions, 61 reducing their positions, and 29 closing their positions.

Holders
295
Holders Change
+66
Holders Change %
+28.82%
% of All Funds
3.96%
Holding in Top 10
6
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-14.29%
% of All Funds
0.08%
New
99
Increased
114
Reduced
61
Closed
29
Calls
$55.7M
Puts
$40.9M
Net Calls
+$14.8M
Net Calls Change
-$1.49M

Top Buyers

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

Top Sellers

1
MC
1
Maverick Capital
Texas
$114M
2
Swedbank
2
Swedbank
Sweden
$88.8M
3
William Blair Investment Management
3
William Blair Investment Management
Illinois
$21.7M
4
ACM
4
Arosa Capital Management
Florida
$3.88M
5
MCM
5
Masters Capital Management
Georgia
$0
Name Market Value Shares Shares
Change 		Shares
Change %
Royal Bank of Canada
26
Royal Bank of Canada
Ontario, Canada
$36.9M 1,714,821 +1,615,993 +1,635%
UBS Group
27
UBS Group
Switzerland
$36.7M 1,704,697 +207,491 +14%
Charles Schwab
28
Charles Schwab
California
$36.3M 1,683,977 +42,902 +3%
ACH
29
ArrowMark Colorado Holdings
Colorado
$36.1M 1,677,512 -511,414 -23%
Loomis, Sayles & Company
30
Loomis, Sayles & Company
Massachusetts
$34.3M 1,591,688 +1,591,688 New
NL
31
Nuveen LLC
North Carolina
$33.4M 1,550,771 +162,347 +12%
Morgan Stanley
32
Morgan Stanley
New York
$31.8M 1,474,710 +252,633 +21%
HRCM
33
Hood River Capital Management
Florida
$31.7M 1,470,273 +1,470,273 New
Bank of America
34
Bank of America
North Carolina
$29.8M 1,383,213 +794,591 +135%
SAM
35
Silvercrest Asset Management
New York
$29.7M 1,379,635 +68,675 +5%
AAM
36
ACK Asset Management
Connecticut
$28.8M 1,337,000 -281,356 -17%
C
37
Chescapmanager
Maryland
$28.6M 1,327,895 – –
UBS AM
38
UBS AM
Illinois
$23.5M 1,090,299 +655,716 +151%
SBH
39
Segall Bryant & Hamill
Illinois
$23.5M 1,089,217 +377,868 +53%
Jennison Associates
40
Jennison Associates
New York
$23.1M 1,072,089 +140,222 +15%
Rockefeller Capital Management
41
Rockefeller Capital Management
New York
$22.9M 1,062,358 +124,121 +13%
SPPAM
42
Summit Partners Public Asset Management
Massachusetts
$22.5M 1,046,000 +150,000 +17%
William Blair Investment Management
43
William Blair Investment Management
Illinois
$21.7M 1,005,847 -725,544 -42%
D.E. Shaw & Co
44
D.E. Shaw & Co
New York
$20.8M 967,455 +515,838 +114%
EA
45
Emerald Advisers
Pennsylvania
$20.8M 965,245 +85,156 +10%
Victory Capital Management
46
Victory Capital Management
Texas
$20.6M 958,674 -46,023 -5%
SIC
47
Schwartz Investment Counsel
Michigan
$20.5M 954,300 – –
Fidelity Investments
48
Fidelity Investments
Massachusetts
$20.4M 946,995 +625,204 +194%
PC
49
Pier Capital
Connecticut
$18.8M 871,028 -70,452 -7%
JPMorgan Chase & Co
50
JPMorgan Chase & Co
New York
$17.8M 825,269 +537,900 +187%
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