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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.

Q4 2021 vs. Q3 2021

How the institutions holding Mirion Technologies, Inc. changed between Q3 2021 and Q4 2021.

All holders in Q4 2021All holders in Q3 2021

13F holders of MIR: Q3 2021 compared with Q4 2021
MeasureQ3 2021Of which not filed for Q4 2021Q4 2021Change
Holders4193+90
Shares1.61M1.40M144.9M+144.7M (+69,992.5%)
Value$16.4M$14.3M$1.52B+$1.52B (+71,736.8%)

1 institution that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so the changes leave them out.

New holders (92)

Institutions that held Mirion Technologies, Inc. at the end of Q4 2021 but not at the end of Q3 2021.

Institutions new to MIR in Q4 2021
InstitutionSharesValue% of portfolio
Goldman Sachs Group Inc53,265,743$557.7M0.14%
Alyeska Investment Group, L.P.13,593,453$142.3M1.64%
FMR LLC7,500,000$78.5M0.01%
Vanguard Group Inc7,028,757$73.6M0.00%
Senator Investment Group LP6,875,000$72.0M1.39%
Swedbank AB5,840,100$61.5M0.10%
Locust Wood Capital Advisers, LLC4,686,731$49.1M2.76%
Corsair Capital Management, L.P.4,386,399$45.9M8.63%
Bamco Inc3,800,000$39.8M0.08%
Cooperman Leon G3,000,000$31.4M1.58%
Blue Pool Management Ltd.3,000,000$31.4M4.04%
Myriad Asset Management Ltd.2,429,545$25.4M2.77%
Ratan Capital Management LP2,363,080$24.7M3.77%
Janus Henderson Group PLC1,892,034$19.8M0.01%
Morgan Stanley1,705,958$17.9M0.00%
Barrow Hanley Mewhinney & Strauss LLC1,649,165$17.3M0.05%
Sculptor Capital LP1,553,052$16.3M0.15%
BlackRock Inc.1,366,427$14.3M0.00%
Bpifrance SA1,286,446$13.5M0.32%
Kingdon Capital Management, L.L.C.1,238,500$13.0M1.94%
First Manhattan Co1,162,435$12.2M0.04%
Manufacturers Life Insurance Company, The1,116,000$11.7M0.01%
Clearline Capital LP1,032,471$10.8M1.48%
FIL Ltd966,500$10.1M0.01%
Geode Capital Management, LLC886,596$9.28M0.00%
Principal Financial Group Inc852,353$8.92M0.01%
Millennium Management LLC839,989$8.79M0.01%
Hudson Bay Capital Management LP703,137$7.36M0.08%
Carlson Capital L P650,000$6.81M0.39%
Gabelli Funds LLC553,566$5.80M0.04%
Charles Schwab Investment Management Inc501,714$5.25M0.00%
Artal Group S.A.500,000$5.24M0.15%
Saya Management LP498,753$5.22M4.69%
One Fin Capital Management LP435,000$4.55M1.90%
Resolute Capital Asset Partners LLC401,437$4.20M2.74%
Wolverine Asset Management LLC357,582$3.74M0.04%
Jefferies Group LLC355,840$3.73M0.07%
State Street Corp319,900$3.35M0.00%
Saba Capital Management, L.P.300,000$3.14M0.06%
Diameter Capital Partners LP281,777$2.95M0.27%
Brant Point Investment Management LLC276,749$2.90M0.53%
Moore Capital Management, LP275,000$2.88M0.07%
Weiss Multi-Strategy Advisers LLC260,050$2.72M0.06%
Qube Research & Technologies Ltd251,016$2.63M0.02%
Cubist Systematic Strategies, LLC243,953$2.55M0.02%
Balyasny Asset Management LLC212,989$2.23M0.01%
Northern Trust Corp196,836$2.06M0.00%
Ionic Capital Management LLC183,899$1.93M0.33%
MYDA Advisors LLC160,000$1.68M0.53%
Gamco Investors, Inc. Et Al157,200$1.65M0.01%
Kepos Capital LP150,000$1.57M0.13%
UBS Group AG141,153$1.48M0.00%
K.J. Harrison & Partners Inc116,450$1.22M0.17%
Citadel Advisors LLC106,449$1.11M0.00%
Advisory Research Inc97,351$1.02M0.08%
Cruiser Capital Advisors, LLC68,543$718.0K0.50%
Telemetry Investments, L.L.C.68,500$717.0K0.94%
Defender Capital, LLC.60,000$682.0K0.22%
Group One Trading, L.P.54,497$571.0K0.01%
Susquehanna International Group, LLP54,356$569.0K0.00%
Bank of America Corp50,800$532.0K0.00%
Bank of New York Mellon Corp48,870$512.0K0.00%
Integrity Capital Management (HK) Ltd46,492$487.0K1.57%
Mirabella Financial Services LLP40,720$426.0K0.04%
Levin Capital Strategies, L.P.38,685$405.0K0.04%
Shay Capital LLC34,000$356.0K0.13%
HighTower Advisors, LLC33,000$345.0K0.00%
CenterBook Partners LP27,462$288.0K0.17%
FDx Advisors, Inc.26,424$277.0K0.01%
YorkBridge Wealth Partners, LLC26,424$277.0K0.06%
Bank of Montreal24,600$260.0K0.00%
GWM Advisors LLC22,402$235.0K0.00%
Wolverine Trading, LLC20,246$213.0K0.00%
Victory Capital Management Inc19,675$206.0K0.00%
Blueshift Asset Management, LLC18,177$190.0K0.02%
Proequities, Inc.17,400$182.0K0.01%
Tower Research Capital LLC (TRC)17,120$179.0K0.00%
Exos Asset Management LLC15,605$163.0K0.08%
Penserra Capital Management LLC12,866$134.0K0.00%
Tuttle Tactical Management12,277$129.0K0.20%
Perpetual Investment Management Ltd12,175$127.0K0.01%
Twinbeech Capital LP11,217$117.0K0.01%
Wells Fargo & Company5,936$62.0K0.00%
American Portfolios Advisors1,165$12.2K0.00%
JPMorgan Chase & Co1,129$12.0K0.00%
Advisor Group Holdings, Inc.891$9.00K0.00%
Blue Bell Private Wealth Management, LLC700$7.00K0.00%
Howe & Rusling Inc273$3.00K0.00%
Albion Financial Group300$3.00K0.00%
FourThought Financial, LLC249$3.00K0.00%
FNY Investment Advisers, LLC222$2.00K0.00%
Byrne Asset Management LLC225$2.00K0.00%

Sold out (2)

Institutions that held Mirion Technologies, Inc. at the end of Q3 2021 and filed for Q4 2021 without it.

Institutions that sold out of MIR in Q4 2021
InstitutionShares, Q3 2021Value, Q3 2021
Marshall Wace, LLP153,727$1.57M
Tudor Investment Corp Et Al51,000$521.0K

Not filed for Q4 2021 yet (1)

Institutions that held Mirion Technologies, Inc. at the end of Q3 2021 and haven't filed a 13F for Q4 2021. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding MIR in Q3 2021 that haven't filed for Q4 2021
InstitutionShares, Q3 2021Value, Q3 2021
Marshall Wace North America L.P.1,400,208$14.3M