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Mirion Technologies (MIR) Institutional Ownership

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$15.07 +0.67 (+4.65%)
As of 08/31/2026 03:58 PM Eastern

Institutional Ownership Changes (13F Filings) for Mirion Technologies (NYSE:MIR)

Current
Institutional Ownership
Percentage
78.51%
Number of
Institutional Buyers
(last 12 months)
232
Total
Institutional Inflows
(last 12 months)
$1.97B
Number of
Institutional Sellers
(last 12 months)
106
Total
Institutional Outflows
(last 12 months)
$1.28B
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MIR Institutional Buying and Selling by Quarter

Mirion Technologies Major Shareholders & Ownership History

Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/27/2026 Corient Private Wealth LP11,931$214K0.0%-56.6%0.005%
8/25/2026 VIRGINIA RETIREMENT SYSTEMS ET Al15,400$276K0.0%N/A0.006%
8/24/2026 California State Teachers Retirement System4,796,078$85.99M0.0%+1,649.8%1.926%
8/23/2026 Troluce Capital Advisors LLC1,539,212$27.60M2.8%-23.0%0.618%
8/21/2026 Nykredit A S7,660$137K0.0%N/A0.003%
8/21/2026 B. Metzler seel. Sohn & Co. AG144,834$2.60M0.0%N/A0.058%
8/19/2026 Wellington Management Group LLP1,098,987$19.71M0.0%+31.2%0.441%
8/11/2026 Madison Asset Management LLC190,001$3.41M0.0%N/A0.076%
8/8/2026 Summit Creek Advisors LLC198,422$3.56M1.2%N/A0.079%
8/6/2026 Bank of New York Mellon Corp1,381,674$24.77M0.0%N/A0.552%
7/10/2026 Tema ETFs LLC226,408$4.06M0.1%+45.4%0.090%
7/7/2026 Balefire LLC12,618$226K0.0%N/A0.005%
6/18/2026 Pacer Advisors Inc.64,182$1.19M0.0%-19.9%0.026%
5/22/2026 Segall Bryant & Hamill LLC1,111,874$20.67M0.3%-4.9%0.444%
5/19/2026 Bank of America Corp DE1,355,298$25.20M0.0%-0.3%0.541%
5/19/2026Janus Henderson Group PLC4,043,089$75.16M0.0%-12.0%1.615%
5/19/2026 Altshuler Shaham Ltd13,147$244K0.0%+12.3%0.005%
5/18/2026 Amundi36,691$682K0.0%+198.3%0.015%
5/18/2026 California State Teachers Retirement System274,096$5.10M0.0%+22.2%0.109%
5/18/2026 Royal Bank of Canada1,961,404$36.46M0.0%-8.7%0.783%
5/18/2026 Empowered Funds LLC26,950$501K0.0%-90.3%0.011%
5/16/2026 The Manufacturers Life Insurance Company111,658$2.08M0.0%-3.4%0.045%
5/16/2026 Maverick Capital Ltd.2,649,879$49.26M0.6%N/A1.058%
5/16/2026 Quantinno Capital Management LP41,705$775K0.0%+269.5%0.017%
5/16/2026 Lazard Asset Management LLC322,421$5.99M0.0%+125.4%0.129%
5/15/2026 Rice Hall James & Associates LLC196,899$3.66M0.2%-1.5%0.079%
5/15/2026 Themes Management Co LLC38,837$722K0.4%+57.0%0.016%
5/15/2026 Entropy Technologies LP38,507$716K0.0%N/A0.015%
5/14/2026 Gabelli Funds LLC367,980$6.84M0.0%-14.5%0.147%
5/14/2026 Gamco Investors INC. ET AL544,662$10.13M0.1%+0.5%0.217%
5/14/2026 Bank of Nova Scotia380,186$7.07M0.0%-2.8%0.152%
5/14/2026Gibbs Wealth Management23,922$445K0.1%N/A0.010%
5/14/2026 Sei Investments Co.458,359$8.52M0.0%+0.4%0.183%
5/14/2026 State of Wyoming6,375$119K0.0%-10.1%0.003%
5/13/2026 Cetera Investment Advisers24,978$464K0.0%+26.7%0.010%
5/13/2026 First Trust Advisors LP146,993$2.73M0.0%-57.8%0.059%
5/8/2026 PNC Financial Services Group Inc.21,485$399K0.0%+17.6%0.009%
5/8/2026 Madison Asset Management LLC124,323$2.31M0.0%+119.5%0.050%
5/7/2026 Dimensional Fund Advisors LP4,694,288$87.24M0.0%+14.4%1.874%
5/7/2026 KBC Group NV153,925$2.86M0.0%+1,907.1%0.061%
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5/7/2026 Swiss National Bank465,900$8.66M0.0%+0.4%0.186%
5/6/2026 Jennison Associates LLC942,696$17.53M0.0%-5.0%0.376%
5/6/2026 Assetmark Inc.3,454$64K0.0%+8,123.8%0.001%
5/6/2026 Allspring Global Investments Holdings LLC1,059,030$19.76M0.0%+2.8%0.423%
5/5/2026 Bastion Asset Management Inc.389,158$7.29M2.2%N/A0.155%
5/5/2026 Bank of New York Mellon Corp4,536,732$84.34M0.0%+47.4%1.811%
5/5/2026 Illinois Municipal Retirement Fund126,334$2.35M0.0%-7.9%0.050%
5/5/2026 Sanctuary Advisors LLC29,619$551K0.0%-1.9%0.012%
5/5/2026 Maryland State Retirement & Pension System35,626$662K0.0%-1.8%0.014%
5/4/2026 Emerald Mutual Fund Advisers Trust873,466$16.24M0.8%+24.0%0.349%
5/4/2026 Emerald Advisers LLC1,381,574$25.68M0.8%+21.5%0.551%
5/4/2026 Principal Financial Group Inc.1,196,049$22.24M0.0%-30.0%0.477%
5/4/2026 Schwartz Investment Counsel Inc.854,300$15.88M0.6%+7.6%0.341%
5/1/2026 Commonwealth of Pennsylvania Public School Empls Retrmt SYS60,504$1.13M0.0%-1.4%0.024%
5/1/2026 Fifth Third Bancorp227,118$4.22M0.0%+20,016.7%0.091%
5/1/2026 Kornitzer Capital Management Inc. KS174,665$3.25M0.1%N/A0.070%
4/30/2026 Oregon Public Employees Retirement Fund55,900$1.04M0.0%-1.4%0.022%
4/29/2026 Swedbank AB3,159,950$58.74M0.1%-7.0%1.261%
4/28/2026 Marietta Investment Partners LLC14,833$276K0.1%-25.7%0.006%
4/28/2026 Stephens Investment Management Group LLC1,374,876$25.56M0.4%+69.7%0.549%
4/27/2026 New York State Teachers Retirement System89,717$1.67M0.0%-8.3%0.036%
4/27/2026 Elevation Point Wealth Partners LLC15,890$295K0.0%N/A0.006%
4/25/2026 Strs Ohio15,000$279K0.0%-27.5%0.006%
4/25/2026 Keybank National Association OH13,038$242K0.0%-4.8%0.005%
4/24/2026 Conestoga Capital Advisors LLC1,831,019$34.04M0.7%-5.6%0.731%
4/24/2026 Peregrine Capital Management LLC462,383$8.60M0.3%+14.7%0.185%
4/22/2026 Janney Montgomery Scott LLC21,039$391K0.0%-5.9%0.008%
4/22/2026 Pictet Asset Management Holding SA35,491$660K0.0%+6.3%0.014%
4/22/2026 Sterling Capital Management LLC38,236$711K0.0%-44.4%0.015%
4/21/2026 Louisiana State Employees Retirement System108,500$2.02M0.0%N/A0.043%
3/17/2026 Rockefeller Capital Management L.P.1,139,037$26.68M0.0%+17.2%0.455%
3/10/2026 Montanaro Asset Management Ltd255,400$5.98M1.7%+48.8%0.102%
3/9/2026 Corient Private Wealth LLC14,510$339K0.0%+16.9%0.006%
2/24/2026 Pacer Advisors Inc.80,127$1.88M0.0%N/A0.032%
2/19/2026 T. Rowe Price Investment Management Inc.15,112,855$353.94M0.2%-29.9%5.955%
2/19/2026 Invesco Ltd.3,101,120$72.63M0.0%+12.5%1.222%
2/19/2026 Corient Private Wealth LLC14,510$339K0.0%+16.9%0.006%
2/18/2026 Vident Advisory LLC14,128$331K0.0%N/A0.006%
2/18/2026 State of Tennessee Department of Treasury74,501$1.85M0.0%+29.7%0.029%
2/18/2026 NewEdge Advisors LLC3,251$76K0.0%-29.8%0.001%
2/18/2026 Empowered Funds LLC278,820$6.53M0.1%-4.2%0.110%
2/18/2026 XTX Topco Ltd125,020$2.93M0.1%N/A0.049%
2/18/2026 Zacks Investment Management402,207$9.42M0.1%-1.2%0.158%
2/18/2026 VARCOV Co.10,838$254K0.1%N/A0.004%
2/18/2026 Wellington Management Group LLP248,775$5.83M0.0%N/A0.098%
2/18/2026 Toronto Dominion Bank17,746$416K0.0%N/A0.007%
2/18/2026 Twinbeech Capital LP57,100$1.34M0.1%N/A0.022%
2/18/2026Janus Henderson Group PLC4,596,949$107.66M0.0%-40.0%1.811%
2/18/2026 Gotham Asset Management LLC93,039$2.18M0.0%N/A0.037%
2/18/2026 Bamco Inc. NY650,000$15.22M0.0%+30.0%0.256%
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2/18/2026 Boothbay Fund Management LLC173,855$4.07M0.1%+500.5%0.069%
2/18/2026 Ardsley Advisory Partners LP325,000$7.61M0.8%-1.0%0.128%
2/18/2026 Alta Park Capital LP562,522$13.17M1.6%-8.0%0.222%
2/18/2026 Altshuler Shaham Ltd11,704$274K0.0%+5.1%0.005%
2/17/2026 Schonfeld Strategic Advisors LLC9,198$215K0.0%N/A0.004%
2/17/2026 Integrated Advisors Network LLC8,957$210K0.0%-6.1%0.004%
2/17/2026 AQR Capital Management LLC277,719$6.50M0.0%-5.0%0.109%
2/17/2026 Troluce Capital Advisors LLC850,000$19.91M12.6%N/A0.335%
2/17/2026 Cetera Investment Advisers19,707$462K0.0%+10.3%0.008%
2/17/2026 Lazard Asset Management LLC143,063$3.35M0.0%-52.3%0.056%


MIR Institutional Ownership - Frequently Asked Questions

During the previous two years, 370 institutional investors and hedge funds held shares of Mirion Technologies. The most heavily invested institutionals were Vanguard Group Inc. ($710.71M), Tudor Investment Corp ET AL ($407.05M), T. Rowe Price Investment Management Inc. ($353.94M), State Street Corp ($215.44M), Cooperman Leon G ($195.00M), Geode Capital Management LLC ($135.55M), and Goldman Sachs Group Inc. ($122.92M).Learn more on Mirion Technologies' institutional investors.

78.51% of Mirion Technologies' stock is owned by institutional investors. Learn more on MIR's institutional investor holdings.

Of the 345 institutional investors that purchased Mirion Technologies' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: Tudor Investment Corp ET AL ($17.59M), Vanguard Group Inc. ($6.88M), Brown Advisory Inc. ($5.56M), California State Teachers Retirement System ($4.62M), Bank of New York Mellon Corp ($4.58M), Arrowstreet Capital Limited Partnership ($4.20M), and Artemis Investment Management LLP ($4.02M).

Institutional investors have bought a total of 87,742,835 shares in the last 24 months. This purchase volume represents approximately $1.97B in transactions.

Of the 106 institutional investors that sold Mirion Technologies' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: T. Rowe Price Investment Management Inc. ($25.69M), Janus Henderson Group PLC ($3.62M), Alyeska Investment Group L.P. ($2.92M), Dimensional Fund Advisors LP ($2.84M), Millennium Management LLC ($2.36M), Massachusetts Financial Services Co. MA ($1.73M), and Swedbank AB ($1.57M).

Institutional investors have sold a total of 55,335,414 shares in the last 24 months. This volume of shares sold represents approximately $1.28B in transactions.



Institutional ownership data for NYSE:MIR is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/27/2026. New 13F filings are added each quarter as they're published.
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