Mirion Technologies, Inc.: which funds bought and sold
Institutions that bought and sold Mirion Technologies shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 185 institutions that filed 13F reports for both quarters added to or opened positions in Mirion Technologies, and 181 cut or closed them. Together they added a net 8.4M shares, +3.4% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 12.4M shares (+18.9%); index fund managers were net buyers of 2.0M shares (+2.2%). 51 opened a new position and 65 sold out entirely.
Bought, Q2 2026 185 institutions, 51 of them new holders Sold, Q2 2026 181 institutions, 65 of them sold out
Net change, all compared +8.4M shares (+3.4%)
Net change, active managers +12.4M shares (+18.9%), 26 bought, 33 sold
Buyers versus sellers
185 bought 36 181 sold
Active managers and hedge funds 26 bought · 33 sold · +12.4M
Index fund managers 8 bought · 3 sold · +2.0M
Other institutions 151 bought · 145 sold · −6.0M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Alyeska Investment Group, L.P. Hedge fund | +6.8M +252.9% | 9.5M | $171M |
| Congress Asset Management Co Active manager | +5.6M +500.1% | 6.7M | $120M |
| Goldman Sachs Group Inc | +3.1M +41.6% | 10.4M | $187M |
| BAMCO Inc Active manager | +2.7M +221.8% | 3.9M | $70M |
| Maverick Capital Ltd Hedge fund | +2.6M +97.9% | 5.2M | $94M |
| Neuberger Berman Group LLC Active manager | +2.3M +273.6% | 3.2M | $57.4M |
| Morgan Stanley | +1.6M +70.5% | 3.9M | $69.9M |
| Royal London Asset Management Ltd | +1.2M New position | 1.2M | $21.1M |
| Clearbridge Investments, LLC Active manager | +1.1M New position | 1.1M | $19.7M |
| FMR LLC Active manager | +778K +11.9% | 7.3M | $131M |
| Exoduspoint Capital Management, LP Hedge fund | +605K New position | 605K | $10.9M |
| Nissay Asset Management Corp /Japan | +599K New position | 599K | $10.7M |
| WCM Investment Management, LLC Active manager | +591K New position | 591K | $10.3M |
| Select Equity Group, L.P. Active manager | +521K +49.3% | 1.6M | $28.3M |
| Point72 Asset Management, L.P. Hedge fund | +503K +288.8% | 678K | $12.1M |
| State Street Corp Index funds | +494K +5.2% | 9.9M | $178M |
| Osaic Holdings, Inc. | +485K +262.3% | 670K | $12M |
| Invesco Ltd. | +475K +20.7% | 2.8M | $49.7M |
| Schroder Investment Management Group Active manager | +459K +40.4% | 1.6M | $27.8M |
| American Century Companies Inc Active manager | +443K +16.2% | 3.2M | $57M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Alyeska Investment Group, L.P. Hedge fund | +6.8M +252.9% | 9.5M | $171M |
| Congress Asset Management Co Active manager | +5.6M +500.1% | 6.7M | $120M |
| BAMCO Inc Active manager | +2.7M +221.8% | 3.9M | $70M |
| Maverick Capital Ltd Hedge fund | +2.6M +97.9% | 5.2M | $94M |
| Neuberger Berman Group LLC Active manager | +2.3M +273.6% | 3.2M | $57.4M |
| Clearbridge Investments, LLC Active manager | +1.1M New position | 1.1M | $19.7M |
| FMR LLC Active manager | +778K +11.9% | 7.3M | $131M |
| Exoduspoint Capital Management, LP Hedge fund | +605K New position | 605K | $10.9M |
| WCM Investment Management, LLC Active manager | +591K New position | 591K | $10.3M |
| Select Equity Group, L.P. Active manager | +521K +49.3% | 1.6M | $28.3M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Millennium Management LLC Hedge fund | −4.1M −80.6% | 992K | $17.8M |
| Bank Of New York Mellon Corp | −3.2M −69.5% | 1.4M | $24.8M |
| Two Creeks Capital Management, LP | −2.4M Sold out | 0 | — |
| Citadel Advisors LLC Hedge fund | −1.8M −98.2% | 33K | $588,032 |
| Alliancebernstein L.P. Active manager | −1.3M −79.9% | 333K | $6.2M |
| Brown Advisory Inc Active manager | −1.3M Sold out | 0 | — |
| Daiwa Securities Group Inc. | −1.2M Sold out | 0 | — |
| Franklin Resources Inc Active manager | −1.1M −55.7% | 884K | $15.9M |
| Voya Investment Management LLC | −1.1M −93.2% | 79K | $1.4M |
| UBS Group AG | −1.1M −28.7% | 2.7M | $48.2M |
| Alta Park Capital, LP | −977K Sold out | 0 | — |
| Lord, Abbett & Co. LLC | −937K Sold out | 0 | — |
| Massachusetts Financial Services Co Active manager | −828K −52.1% | 761K | $13.6M |
| Fred Alger Management, LLC Active manager | −754K −82.8% | 156K | $2.8M |
| Oberweis Asset Management Inc/ Active manager | −744K Sold out | 0 | — |
| BNP Paribas Financial Markets | −660K −59.4% | 451K | $8.1M |
| Swedbank AB | −629K −19.9% | 2.5M | $45.4M |
| Conestoga Capital Advisors, LLC | −583K −31.8% | 1.2M | $22.4M |
| Nomura Asset Management International Inc. | −562K −77.3% | 165K | $3M |
| Artemis Investment Management LLP Active manager | −539K Sold out | 0 | — |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Millennium Management LLC Hedge fund | −4.1M −80.6% | 992K | $17.8M |
| Citadel Advisors LLC Hedge fund | −1.8M −98.2% | 33K | $588,032 |
| Alliancebernstein L.P. Active manager | −1.3M −79.9% | 333K | $6.2M |
| Brown Advisory Inc Active manager | −1.3M Sold out | 0 | — |
| Franklin Resources Inc Active manager | −1.1M −55.7% | 884K | $15.9M |
| Massachusetts Financial Services Co Active manager | −828K −52.1% | 761K | $13.6M |
| Fred Alger Management, LLC Active manager | −754K −82.8% | 156K | $2.8M |
| Oberweis Asset Management Inc/ Active manager | −744K Sold out | 0 | — |
| Artemis Investment Management LLP Active manager | −539K Sold out | 0 | — |
| T. Rowe Price Investment Management, Inc. Active manager | −340K −2.3% | 14.3M | $256M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Royal London Asset Management Ltd | 1.2M | $21.1M |
| Clearbridge Investments, LLCActive manager | 1.1M | $19.7M |
| Exoduspoint Capital Management, LPHedge fund | 605K | $10.9M |
| Nissay Asset Management Corp /Japan | 599K | $10.7M |
| WCM Investment Management, LLCActive manager | 591K | $10.3M |
| HRT Financial LP | 340K | $6.1M |
| Frontier Capital Management Co LLCActive manager | 299K | $5.4M |
| Cambridge Investment Research Advisors, Inc. | 201K | $3.6M |
| B. Metzler Seel. Sohn & Co. AG | 145K | $2.6M |
| Diversify Advisory Services, LLC | 79K | $1.3M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Two Creeks Capital Management, LP | 2.4M | $45.5M |
| Brown Advisory IncActive manager | 1.3M | $24.2M |
| Daiwa Securities Group Inc. | 1.2M | $22.6M |
| Alta Park Capital, LP | 977K | $18.2M |
| Lord, Abbett & Co. LLC | 937K | $17.4M |
| Oberweis Asset Management Inc/Active manager | 744K | $13.8M |
| Artemis Investment Management LLPActive manager | 539K | $10M |
| Zacks Investment Management | 389K | $7.2M |
| Aperture Investors, LLC | 152K | $2.8M |
| Ddd Partners, LLC | 143K | $2.7M |
Who holds the shares
- Institutions reporting
- 343
- Ten largest holders
- 51.1% of 13F-reported shares
- Index fund managers
- 34.7% of 13F-reported shares
- Active managers and hedge funds
- 29.9% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 26 | 33 | 7 | 12 | +12.4M | +18.9% |
| Index fund managers | 8 | 3 | 0 | 0 | +2.0M | +2.2% |
| Other institutions | 151 | 145 | 44 | 53 | −6.0M | −6.4% |
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