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Mirion Technologies, Inc.

MIR
Exchange
NYSE
Industry
Measuring & Controlling Devices, NEC
SEC CIK
0001809987

In the last 90 days, Mirion Technologies, Inc. insiders filed 1 open-market purchase and 0 sales; 351 institutions reported holding it in 13F filings for Q2 2026, worth $4.70B in total; Maverick Capital is the only superinvestor holding it.

Q1 2026 vs. Q4 2025

How the institutions holding Mirion Technologies, Inc. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026All holders in Q4 2025

13F holders of MIR: Q4 2025 compared with Q1 2026
MeasureQ4 2025Of which not filed for Q1 2026Q1 2026Change
Holders3658362+5
Shares252.2M31.0M253.5M+32.3M (+14.6%)
Value$5.91B$725.8M$4.71B−$467.0M (−9.0%)

8 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (62)

Institutions that held Mirion Technologies, Inc. at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to MIR in Q1 2026
InstitutionSharesValue% of portfolio
Vanguard Portfolio Management LLC17,905,722$332.9M0.02%
Vanguard Capital Management LLC10,505,195$195.3M0.00%
Millennium Management LLC5,106,801$94.9M0.07%
Maverick Capital LtdSuperinvestorMaverick Capital2,649,879$49.3M0.57%
Vanguard Fiduciary Trust Co1,694,538$31.5M0.01%
Congress Asset Management Co1,114,061$20.7M0.15%
Fred Alger Management, LLC909,606$16.9M0.07%
Standard Life Aberdeen plc456,462$8.49M0.01%
Bastion Asset Management Inc.389,158$7.29M2.22%
Mirova368,380$6.85M0.28%
Summit Creek Advisors LLC315,880$5.87M1.21%
Vanguard Asset Management, Ltd178,612$3.32M0.00%
Kornitzer Capital Management Inc174,665$3.25M0.07%
Point72 Asset Management, L.P.174,271$3.24M0.01%
Susquehanna International Group, LLP161,350$3.00M0.00%
Qube Research & Technologies Ltd123,462$2.30M0.00%
Covea Finance119,200$2.22M0.08%
Vanguard Global Advisers, LLC103,131$1.92M0.00%
Scotia Capital Inc.94,737$1.76M0.01%
RMB Capital Management, LLC88,444$1.64M0.03%
Holocene Advisors, LP85,066$1.58M0.00%
Dana Investment Advisors, Inc.83,120$1.55M0.05%
Tribune Investment Group LP65,000$1.21M0.81%
Vanguard Investments Australia, Ltd.58,950$1.10M0.00%
Asset Management One Co.,Ltd.55,723$1.03M0.00%
Neo Ivy Capital Management44,607$829.2K0.22%
Blackstone Group Inc.42,414$788.5K0.00%
Entropy Technologies, LP38,507$715.8K0.03%
Axq Capital, LP28,167$523.6K0.07%
CI Private Wealth, LLC27,481$510.9K0.00%
Gibbs Wealth Management23,922$444.7K0.06%
Alliance Wealth Advisors, LLC22,205$412.8K0.09%
Squarepoint Ops LLC21,567$400.9K0.00%
Shelton Capital Management18,164$337.7K0.01%
Jain Global LLC18,001$334.6K0.00%
Daymark Wealth Partners, LLC17,640$327.9K0.01%
Portside Wealth Group, LLC16,542$307.5K0.04%
Mount Yale Investment Advisors, LLC15,890$295.4K0.01%
AlphaGrep UK Ltd15,430$286.8K0.08%
CenterBook Partners LP15,373$285.8K0.02%
DnB Asset Management AS15,054$279.9K0.00%
Mirabella Financial Services LLP14,273$265.3K0.03%
CIBC Bancorp USA Inc.12,535$233.0K0.00%
Park Avenue Securities LLC10,816$201.0K0.00%
Beacon Pointe Advisors, LLC10,694$198.8K0.00%
Brinker Capital Investments, LLC10,151$188.7K0.00%
Mirae Asset Global Investments Co., Ltd.5,700$106.0K0.00%
Aster Capital Management (DIFC) Ltd4,804$69.7K0.02%
MAI Capital Management1,325$24.6K0.00%
Advisory Services Network, LLC1,224$22.8K0.00%
Golden State Equity Partners510$9.48K0.00%
Whittier Trust Co195$3.69K0.00%
CVA Family Office, LLC196$3.64K0.00%
Caitong International Asset Management Co., Ltd158$2.94K0.00%
Richardson Capital Management LLC89$1.66K0.00%
Twin Peaks Wealth Advisors, LLC74$1.38K0.00%
Financial Network Wealth Advisors LLC66$1.23K0.00%
SWAN Capital LLC20$3720.00%
International Assets Investment Management, LLC12$2240.00%
Prestige Wealth Management Group LLC11$2050.00%
Vermillion Wealth Management, Inc.11$2040.00%
Hughes Financial Services, LLC1$190.00%

Sold out (57)

Institutions that held Mirion Technologies, Inc. at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of MIR in Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Hood River Capital Management LLC2,780,137$65.1M
Driehaus Capital Management LLC2,299,122$53.8M
Vaughan Nelson Investment Management, L.P.1,332,550$31.2M
Arrowstreet Capital, Limited Partnership1,071,340$25.1M
Telemark Asset Management, LLC500,000$11.7M
Summit Partners Public Asset Management, LLC500,000$11.7M
Castleark Management LLC348,130$8.15M
Ghisallo Capital Management LLC250,000$5.86M
Munro Partners222,720$5.22M
EAM Investors, LLC193,324$4.53M
Lisanti Capital Growth, LLC156,740$3.67M
Sculptor Capital LP140,000$3.28M
HRT Financial LP138,182$3.24M
Ci Investments Inc.106,612$2.50M
NEOS Investment Management LLC104,962$2.46M
Credit Agricole S A103,179$2.42M
Blackhawk Capital Partners LLC.93,407$2.19M
Gotham Asset Management, LLC93,039$2.18M
Verition Fund Management LLC89,100$2.09M
Mariner, LLC62,504$1.46M
PensionDanmark Pensionsforsikringsaktieselskab50,000$1.17M
Dymon Asia Capital (Singapore) Pte. Ltd.34,774$814.4K
Ostrum Asset Management34,380$805.2K
Calamos Advisors LLC31,700$742.4K
Laurion Capital Management LP28,188$660.2K
Headlands Technologies LLC20,964$491.0K
Toronto Dominion Bank17,746$415.6K
Ethic Inc.16,271$381.1K
Inceptionr LLC15,428$361.3K
Ieq Capital, LLC14,522$340.1K
Cerity Partners LLC12,610$295.3K
Harbour Capital Advisors, LLC12,125$288.9K
O'Shaughnessy Asset Management, LLC11,546$270.4K
VARCOV Co.10,838$253.8K
CIBC Asset Management Inc9,840$230.5K
Weiss Asset Management LP9,720$227.6K
Forum Financial Management, LP9,317$218.2K
Schonfeld Strategic Advisors LLC9,198$215.4K
Absher Wealth Management, LLC9,000$210.8K
Integrated Advisors Network LLC8,957$209.8K
CastleKnight Management LP8,750$204.9K
Merit Financial Group, LLC8,574$200.8K
Jefferies Financial Group Inc.8,500$199.1K
Kestra Advisory Services, LLC7,536$176.5K
Quest Partners LLC3,241$75.9K
DV Trading LLC1,006$23.6K
SageView Advisory Group, LLC1,005$23.5K
SRS Capital Advisors, Inc.785$18.4K
Eurizon Capital SGR S.p.A.641$15.0K
Hillsdale Investment Management Inc.350$8.20K
High Note Wealth, LLC169$3.96K
Clearstead Advisors, LLC93$2.18K
Harvest Fund Management Co., Ltd93$2.00K
Toth Financial Advisory Corp85$1.99K
Marquette Asset Management, LLC67$1.57K
Bellevue Asset Management, LLC66$1.54K
Ankerstar Wealth, LLC34$796

Not filed for Q1 2026 yet (8)

Institutions that held Mirion Technologies, Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding MIR in Q4 2025 that haven't filed for Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Vanguard Group Inc30,346,328$710.7M
Keystone Investors Pte Ltd309,887$7.26M
Comerica Bank222,756$5.22M
Norges Bank92,105$2.16M
CIBC World Markets Corp15,870$371.7K
Global Retirement Partners, LLC2,018$47.3K
CIBC Private Wealth Group, LLC808$18.9K
ORG Partners LLC510$11.9K