Who Owns Mirion Technologies, Inc. (MIR)?Hedge Fund & Institutional Holders

$18.74-1.31 (-6.54%)IndustrialsNYSE

Institutional Holders

50

as of Q4 2025

Total Institutional Value

$InfinityT

% of Float Held

Infinity%

QoQ Change in Holders

+10 / -4

Price History

$9.45$14.52$19.60$24.68$29.75Aug 24Jun 25Mar 26

MIR — Biggest New Institutional Buyers This Quarter

FundActionShares AddedValue Added
MASSACHUSETTS FINANCIAL SERVICES CO /MA/New Position+3.7M+$85.8B
Conestoga Capital Advisors, LLCNew Position+1.9M+$45.4B
PRINCIPAL FINANCIAL GROUP INCNew Position+1.7M+$40.0B
CITADEL ADVISORS LLCIncreased+1.4M+$32.6B
JPMORGAN CHASE & COIncreased+1.4M+$31.5B
VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.New Position+1.3M+$31.2B
EMERALD ADVISERS, LLCNew Position+1.1M+$26.6B
Artemis Investment Management LLPIncreased+1.0M+$24.0B
JENNISON ASSOCIATES LLCNew Position+993K+$23.2B
Troluce Capital Advisors LLCNew Position+850K+$19.9B
DAVIDSON KEMPNER CAPITAL MANAGEMENT LPIncreased+854K+$19.3B
VOYA INVESTMENT MANAGEMENT LLCIncreased+837K+$19.0B
FEDERATED HERMES, INC.New Position+849K+$19.0B
Stephens Investment Management Group LLCNew Position+810K+$19.0B
SCHWARTZ INVESTMENT COUNSEL INCNew Position+794K+$18.6B

MIR — Institutions Reducing or Closing Positions

FundActionShares SoldValue Sold
JANUS HENDERSON GROUP PLCDecreased-3.1M-$72.2B
MAVERICK CAPITAL LTDClosed Position-2.6M-$60.2B
DIMENSIONAL FUND ADVISORS LPDecreased-2.1M-$51.4B
Alyeska Investment Group, L.P.Decreased-1.6M-$37.8B
BROWN ADVISORY INCDecreased-1.1M-$27.3B
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPDecreased-931K-$21.6B
TUDOR INVESTMENT CORP ET ALClosed Position-17.5M-$18.8B
VICTORY CAPITAL MANAGEMENT INCDecreased-677K-$16.2B
AMERICAN CENTURY COMPANIES INCDecreased-673K-$16.1B
D. E. Shaw & Co., Inc.Decreased-610K-$15.8B
Two Creeks Capital Management, LPDecreased-675K-$15.2B
KEYSTONE INVESTORS PTE LTDDecreased-572K-$13.2B
Yaupon Capital Management LPClosed Position-525K-$12.2B
Ghisallo Capital Management LLCDecreased-525K-$12.2B
MILLENNIUM MANAGEMENT LLCClosed Position-521K-$12.1B

Top Institutional Holders(Q4 2025)

#FundSharesValue% of PortfolioType
1COOPERMAN LEON G8,383,441$196.3B6.51%Share
2FMR LLC6,850,890$160.0B8.16%Share
3Munro Partners417,500$119.2B3.10%Call
4GOLDMAN SACHS GROUP INC4,097,386$95.0B11.71%Share
5UBS Group AG4,012,462$94.0B15.24%Share
6JANUS HENDERSON GROUP PLC3,754,655$87.0B38.96%Share
7DIMENSIONAL FUND ADVISORS LP3,745,885$87.0B18.25%Share
8MASSACHUSETTS FINANCIAL SERVICES CO /MA/3,225,771$75.5B24.36%Share
9Two Creeks Capital Management, LP2,923,802$68.5B5.61%Share
10Hood River Capital Management LLC2,780,137$65.1B713.79%Share
11AMERICAN CENTURY COMPANIES INC2,556,724$59.0B29.65%Share
12CHARLES SCHWAB INVESTMENT MANAGEMENT INC2,344,241$54.0B8.39%Share
13DRIEHAUS CAPITAL MANAGEMENT LLC2,299,122$53.8B365.74%Share
14Invesco Ltd.2,232,528$52.3B8.02%Share
15LOOMIS SAYLES & CO L P2,123,253$49.0B59.07%Share
16Artemis Investment Management LLP1,971,711$46.2B557.87%Share
17NORTHERN TRUST CORP2,002,905$46.0B5.86%Share
18Conestoga Capital Advisors, LLC1,938,849$45.4B764.10%Share
19PRINCIPAL FINANCIAL GROUP INC1,693,491$39.7B20.25%Share
20Chescapmanager LLC1,659,137$38.9B3.24%Share
21CITADEL ADVISORS LLC1,588,387$37.0B5.56%Share
22Alyeska Investment Group, L.P.1,531,217$35.0B98.86%Share
23BROWN ADVISORY INC1,532,570$35.0B48.83%Share
24AMERIPRISE FINANCIAL INC1,329,540$31.0B7.01%Share
25JPMORGAN CHASE & CO1,294,016$30.0B1.88%Share
26SUSQUEHANNA INTERNATIONAL GROUP, LLP1,241,800$29.0B3.34%Call
27SEGALL BRYANT & HAMILL, LLC1,169,689$27.4B370.78%Share
28EMERALD ADVISERS, LLC1,137,146$26.6B0.82%Share
29RAYMOND JAMES FINANCIAL INC1,107,832$26.0B8.09%Share
30Rockefeller Capital Management L.P.1,088,787$25.0B45.01%Share
31ARROWSTREET CAPITAL, LIMITED PARTNERSHIP1,071,340$25.0B14.64%Share
32GOLDMAN SACHS GROUP INC1,026,776$24.0B2.96%Share
33SCHRODER INVESTMENT MANAGEMENT GROUP1,011,014$23.0B17.44%Share
34TimesSquare Capital Management, LLC967,261$22.7B341.24%Share
35BANK OF AMERICA CORP /DE/968,236$22.0B1.60%Share
36ROYAL BANK OF CANADA966,084$22.0B3.58%Share
37VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.926,300$21.7B212.03%Share
38DAVIDSON KEMPNER CAPITAL MANAGEMENT LP928,513$21.0B333.55%Share
39AMERIPRISE FINANCIAL INC902,448$21.0B4.75%Share
40FMR LLC878,160$20.0B1.02%Share
41PUBLIC SECTOR PENSION INVESTMENT BOARD857,684$20.0B67.15%Share
42Troluce Capital Advisors LLC850,000$19.9B12.63%Share
43ROYAL BANK OF CANADA823,962$19.0B3.09%Share
44FEDERATED HERMES, INC.846,566$19.0B31.74%Share
45SILVERCREST ASSET MANAGEMENT GROUP LLC818,244$19.0B130.58%Share
46UBS Group AG810,750$19.0B3.08%Share
47Stephens Investment Management Group LLC809,943$19.0B247.04%Share
48SCHWARTZ INVESTMENT COUNSEL INC794,300$18.6B0.65%Share
49JENNISON ASSOCIATES LLC786,170$18.4B11.05%Share
50FRANKLIN RESOURCES INC803,644$18.0B4.42%Share

MIR Institutional Ownership History

QuarterHoldersTotal ValueChange
Q4 2025360$2.9T+111
Q3 2025249$2.5T-5
Q2 2025254$1.8T+24
Q1 2025230$1.8T+13
Q4 2024217$2.2T+60
Q3 2024157$17.0T+18
Q2 2024139$19.9T+14
Q1 2024125$12.6T—

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As of Q4 2025, 50 institutional investors hold MIR (Mirion Technologies, Inc.). The largest holder is COOPERMAN LEON G with $196.3B in shares. This quarter, 10 institutions opened new positions and 4 closed their positions.

Frequently Asked Questions

How many hedge funds own MIR?

As of Q4 2025, 50 institutional investors report holding MIR (Mirion Technologies, Inc.) in their 13F filings.

Who is the largest institutional holder of MIR?

The largest institutional holder of MIR is COOPERMAN LEON G with $196.3B in shares.

Is institutional ownership of MIR increasing or decreasing?

This quarter, 10 institutions opened new positions in MIR and 4 closed their positions.