DOSSIER · 13F Holders · Q2 2026Healthcare · Measuring & Controlling Devices, NEC
MIR

MIRION TECHNOLOGIES INC

378 institutions still hold MIRION TECHNOLOGIES INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 60471A101·Measuring & Controlling Devices, NEC·378 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$3.1B
visible holders
Holders
378
filers reporting
Concentration
22.04%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q2 2026

378 institutions reported MIR in Q2 2026. BlackRock, Inc. leads at 22.0% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$686M38.3M0.01%Q2 2026
02
Vanguard Portfolio Management
CIK 0002100121· Index
$326M18.2M0.01%Q2 2026
03
T. Rowe Price Investment Management, Inc.
CIK 0001897612
$272M14.6M0.19%Q1 2026
04
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$190M10.6M0.00%Q2 2026
05
GOLDMAN SACHS GROUP INC
CIK 0000886982
$187M10.4M0.02%Q2 2026
06
STATE STREET CORP
CIK 0000093751
$178M9.9M0.01%Q2 2026
07
Alyeska Investment Group, L.P.
CIK 0001453072
$171M9.5M0.44%Q2 2026
08
COOPERMAN LEON G
CIK 0000898382
$150M8.4M4.24%Q2 2026
09
FMR LLC
CIK 0000315066
$131M7.3M0.01%Q2 2026
10
CONGRESS ASSET MANAGEMENT CO
CIK 0000897378
$120M6.7M0.74%Q2 2026
11
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$113M6.3M0.01%Q2 2026
12
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$87M4.9M0.02%Q2 2026
13
JANUS HENDERSON GROUP PLC
CIK 0001274173
$75M4.0M0.04%Q1 2026
14
Jupiter Topco LLC
CIK 0002146052
$74M4.1M0.03%Q2 2026
15
BAMCO INC /NY/
CIK 0001017918
$70M3.9M0.11%Q2 2026
16
MORGAN STANLEY
CIK 0000895421
$70M3.9M0.00%Q2 2026
17
Neuberger Berman Group LLC
CIK 0001465109
$57M3.2M0.04%Q2 2026
18
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$57M3.2M0.03%Q2 2026
19
Invesco Ltd.
CIK 0000914208
$50M2.8M0.00%Q2 2026
20
MAVERICK CAPITAL LTD
CIK 0000934639
$49M2.6M0.57%Q1 2026
Page 1 of 19
358 more holders available. Log in →
Insiders at MIRION TECHNOLOGIES INC
Rege SheilaMarkopoulos JodyKuo John WEtzel Steven W.Cascella RobertBockhorst KennethKingsley Lawrence DMoore Christopher A.