MIRION TECHNOLOGIES INC MIR
COM CL A · Common Stock · CUSIP 60471A101
Company in the United States
- SectorTechnology
- IndustryMeasuring & Controlling Devices, NEC
- HeadquartersAtlanta, GA
- Websitemirion.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($301.1k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $10.74. Options: 6 managers hold calls ($1.3m notional), 4 hold puts ($845.0k).
Trends to Q2 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 121 |
| Q4 2022 | 120 |
| Q1 2023 | 118 |
| Q2 2023 | 125 |
| Q3 2023 | 128 |
| Q4 2023 | 126 |
| Q1 2024 | 144 |
| Q2 2024 | 157 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 57 | 63 |
| Q1 2023 | 64 | 56 |
| Q2 2023 | 86 | 32 |
| Q3 2023 | 79 | 40 |
| Q4 2023 | 62 | 59 |
| Q1 2024 | 79 | 59 |
| Q2 2024 | 93 | 65 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2023 | $17.1m | $1.5m | 0.09 |
| Q4 2023 | $28.2m | $2.3m | 0.08 |
| Q1 2024 | $20.8m | $724.0k | 0.03 |
| Q2 2024 | $1.3m | $845.0k | 0.67 |
Biggest buyers
| ACK Asset Management LLC | New | +3.3m |
| GOLDMAN SACHS GROUP INC | Added | +3.2m |
| AMERICAN CENTURY COMPANIES INC | Added | +1.5m |
| DIMENSIONAL FUND ADVISORS LP | Added | +1.0m |
| Bornite Capital Management LP | New | +1.0m |
| Chescapmanager LLC | Added | +660.6k |
| VANGUARD GROUP INC | Added | +577.5k |
| MILLENNIUM MANAGEMENT LLC | New | +533.5k |
| COOPERMAN LEON G | Added | +486.6k |
| Nicholas Investment Partners, LP | New | +486.3k |
Biggest sellers
| MORGAN STANLEY | Reduced | -2.5m |
| P2 Capital Partners, LLC | Reduced | -819.0k |
| CIBC WORLD MARKET INC. | Sold out | -805.0k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Sold out | -737.0k |
| JANUS HENDERSON GROUP PLC | Reduced | -717.8k |
| T. Rowe Price Investment Management, Inc. | Reduced | -659.8k |
| Carlson Capital, L.P. | Sold out | -618.5k |
| CIBC WORLD MARKETS CORP | Sold out | -575.0k |
| Verition Fund Management LLC | Sold out | -548.1k |
| JPMORGAN CHASE & CO | Reduced | -486.0k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $411.3k38.3k shares |
| SIMPLEX TRADING, LLC | Reduced | $342.0k31.9k shares |
| GROUP ONE TRADING LLC | Reduced | $330.8k30.8k shares |
| PEAK6 Investments LLC | Reduced | $145.0k13.5k shares |
| CITADEL ADVISORS LLC | Reduced | $29.0k2.7k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $589.6k54.9k shares |
| GROUP ONE TRADING LLC | Added | $150.4k14.0k shares |
| SIMPLEX TRADING, LLC | Added | $105.0k9.8k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution filed 2025-10-02 | 14.8% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 7.4% |
| T. Rowe Price Investment Management, Inc. 13G · institution filed 2026-02-17 | 6.1% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 | 5.0% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC), KUWAIT INVESTMENT AUTHORITY ON BEHALF OF THE GOVT OF KUWAIT (4.1%, 2026-01-21)
Insider purchases and sales in Q2 2024
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q3 2022 | 0 | — | 0 | — | — |
| Q4 2022 | 0 | — | 1 | $16.4k | — |
| Q1 2023 | 0 | — | 1 | — | — |
| Q2 2023 | 0 | — | 1 | $27.2k | — |
| Q3 2023 | 0 | — | 0 | — | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 1 | $1.0m | $1.0m |
| Q2 2024 | 0 | — | 3 | $351.7k | $267.8k |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-06-26 | Lee Emmanuelle Chief Legal Officer · By Trust | Sold plan | $53.8k5.0k shares |
| 2024-06-24 | Logan Thomas D Chief Executive Officer, director · By Aere Perennius, LLC | Sold plan | $81.7k7.5k shares |
| 2024-06-13 | Moore Christopher A. Chief Accounting Officer (PAO) | Sold | $83.9k8.2k shares |
| 2024-06-06 | Lee Emmanuelle Chief Legal Officer · By Trust | Sold plan | $50.9k5.0k shares |
| 2024-05-28 | Logan Thomas D Chief Executive Officer, director · By Aere Perennius, LLC | Sold plan | $81.5k7.5k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2024
| Manager | Shares | Change |
|---|---|---|
| GOLDMAN SACHS GROUP INC 0.08% of their portfolio | 38.0m $407.9m | Added +3.2m |
| VANGUARD GROUP INC 0.00% of their portfolio | 21.9m $235.1m | Added +577.5k |
| T. Rowe Price Investment Management, Inc. 0.14% of their portfolio | 20.0m $214.6m | Reduced -659.8k |
| BlackRock Inc. 0.00% of their portfolio | 15.8m $169.7m | Added +246.9k |
| Swedbank AB 0.15% of their portfolio | 10.4m $111.5m | Reduced -396.9k |
| JANUS HENDERSON GROUP PLC 0.05% of their portfolio | 8.7m $93.3m | Reduced -717.8k |
| COOPERMAN LEON G 3.63% of their portfolio | 8.0m $85.9m | Added +486.6k |
| Alyeska Investment Group, L.P. 0.43% of their portfolio | 7.0m $74.9m | Added +51.2k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 6.1m $65.6m | Added +1.0m |
| Select Equity Group, L.P. 0.25% of their portfolio | 5.8m $62.1m | Reduced -176.6k |
| STATE STREET CORP 0.00% of their portfolio | 5.2m $56.1m | Added +176.5k |
| P2 Capital Partners, LLC 6.02% of their portfolio | 4.7m $50.5m | Reduced -819.0k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 4.4m $46.8m | Added +154.4k |
| AMERICAN CENTURY COMPANIES INC 0.03% of their portfolio | 3.9m $42.3m | Added +1.5m |
| ACK Asset Management LLC 4.37% of their portfolio | 3.3m $35.4m | New |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.06% of their portfolio | 3.2m $34.9m | Added +204.9k |
| LORD, ABBETT & CO. LLC 0.05% of their portfolio | 2.9m $31.0m | Reduced -188.3k |
| ArrowMark Colorado Holdings LLC 0.35% of their portfolio | 2.8m $29.6m | Reduced -40.3k |
| FIRST MANHATTAN CO. LLC. 0.06% of their portfolio | 1.7m $18.5m | Reduced -36.0k |
| CORSAIR CAPITAL MANAGEMENT, L.P. 3.12% of their portfolio | 1.7m $18.5m | Reduced -23.2k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 1.7m $17.8m | Reduced -53.6k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 1.5m $16.3m | Added +40.9k |
| SCHWARTZ INVESTMENT COUNSEL INC 0.60% of their portfolio | 1.5m $16.3m | Added +20.0k |
| Chescapmanager LLC 1.75% of their portfolio | 1.0m $11.1m | Added +660.6k |
| Bornite Capital Management LP 1.82% of their portfolio | 1.0m $11.0m | New |
| Bank of New York Mellon Corp 0.00% of their portfolio | 816.8k $8.8m | Added +97.9k |
| Crestline Management, L.P. 0.68% of their portfolio | 810.0k $8.7m | Unchanged |
| Nuveen Asset Management, LLC 0.00% of their portfolio | 781.1k $8.4m | Reduced -382.2k |
| GAMCO INVESTORS, INC. ET AL 0.09% of their portfolio | 735.6k $7.9m | Reduced -33.0k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 699.4k $7.5m | Reduced -486.0k |
| GABELLI FUNDS LLC 0.05% of their portfolio | 661.7k $7.1m | Reduced -44.4k |
| MORGAN STANLEY 0.00% of their portfolio | 584.6k $6.3m | Reduced -2.5m |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 533.5k $5.7m | New |
| Nicholas Investment Partners, LP 0.54% of their portfolio | 486.3k $5.2m | New |
| ROYCE & ASSOCIATES LP 0.05% of their portfolio | 480.0k $5.2m | Added +50.0k |
| JANE STREET GROUP, LLC 0.01% of their portfolio | 435.3k $4.7m | Added +412.9k |
| UBS Group AG 0.00% of their portfolio | 424.9k $4.6m | Reduced -153.1k |
| LAZARD ASSET MANAGEMENT LLC 0.01% of their portfolio | 392.3k $4.2m | Added +369.5k |
| TD Asset Management Inc 0.00% of their portfolio | 378.6k $4.1m | Added +34.1k |
| FIL Ltd 0.00% of their portfolio | 375.3k $4.0m | New |
| SEGALL BRYANT & HAMILL, LLC 0.07% of their portfolio | 353.5k $3.8m | New |
| ESSEX INVESTMENT MANAGEMENT CO LLC 0.70% of their portfolio | 350.5k $3.8m | Added +91.0k |
| Swiss National Bank 0.00% of their portfolio | 343.6k $3.7m | Unchanged |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 329.2k $3.5m | Added +112.2k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 325.6k $3.5m | Added +1.3k |
| EAGLE ASSET MANAGEMENT INC 0.02% of their portfolio | 314.6k $3.3m | New |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 286.9k $3.1m | Reduced -167.1k |
| Invesco Ltd. 0.00% of their portfolio | 248.6k $2.7m | Reduced -6.0k |
| RICE HALL JAMES & ASSOCIATES, LLC 0.14% of their portfolio | 221.3k $2.4m | New |
| Aperture Investors, LLC 0.35% of their portfolio | 220.1k $2.4m | Added +67.0k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 218.1k $2.3m | Reduced -1.6k |
| Hollow Brook Wealth Management LLC 0.76% of their portfolio | 207.6k $2.2m | Added +8.6k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 200.7k $2.2m | Added +52.1k |
| M&T Bank Corp 0.01% of their portfolio | 200.2k $2.2m | Reduced -110 |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 186.6k $2.0m | Reduced -172.9k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 183.8k $2.0m | Added +104.1k |
| Legato Capital Management LLC 0.26% of their portfolio | 182.0k $2.0m | Added +61.9k |
| State of New Jersey Common Pension Fund D 0.01% of their portfolio | 176.0k $1.9m | New |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 174.0k $1.9m | Reduced -128.5k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 172.4k $1.9m | Reduced -4.6k |
| Legal & General Group Plc 0.00% of their portfolio | 168.2k $1.8m | Added +821 |
| Alberta Investment Management Corp 0.02% of their portfolio | 168.2k $1.8m | New |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 160.1k $1.7m | Added +79.1k |
| MAVERICK CAPITAL LTD 0.03% of their portfolio | 159.8k $1.7m | Added +119.0k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 152.1k $1.6m | Added +77.7k |
| Squarepoint Ops LLC 0.01% of their portfolio | 152.1k $1.6m | Added +124.8k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 139.8k $1.5m | Reduced -15.2k |
| Boston Partners 0.00% of their portfolio | 127.1k $1.4m | Added +55.0k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 117.9k $1.3m | Added +6.4k |
| MetLife Investment Management, LLC 0.01% of their portfolio | 117.3k $1.3m | Added +10.9k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 110.0k $1.2m | Added +5.0k |
| Corebridge Financial, Inc. 0.01% of their portfolio | 107.5k $1.2m | First filing |
| CITIGROUP INC 0.00% of their portfolio | 106.6k $1.1m | Added +32.3k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 102.5k $1.1m | First filing |
| ARDSLEY ADVISORY PARTNERS LP 0.19% of their portfolio | 100.0k $1.1m | Reduced -25.0k |
| BARCLAYS PLC 0.00% of their portfolio | 72.4k $777.5k | Reduced -103.0k |
| JENNISON ASSOCIATES LLC 0.00% of their portfolio | 71.8k $771.1k | New |
| VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 67.1k $720.2k | Added +608 |
| TUDOR INVESTMENT CORP ET AL 0.01% of their portfolio | 65.5k $703.5k | New |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.00% of their portfolio | 57.2k $614.4k | New |
| OPPENHEIMER & CO INC 0.01% of their portfolio | 55.7k $597.8k | New |
| ARIZONA STATE RETIREMENT SYSTEM 0.00% of their portfolio | 49.0k $525.9k | Added +1.0k |
| TEACHER RETIREMENT SYSTEM OF TEXAS 0.00% of their portfolio | 47.0k $505.0k | Added +9.9k |
| Handelsbanken Fonder AB 0.00% of their portfolio | 46.8k $503.0k | Unchanged |
| Allspring Global Investments Holdings, LLC 0.00% of their portfolio | 43.7k $469.0k | Reduced -5.8k |
| Campbell & CO Investment Adviser LLC 0.03% of their portfolio | 34.2k $367.0k | Reduced -8.6k |
| Tower Research Capital LLC (TRC) 0.01% of their portfolio | 33.6k $361.2k | Added +31.7k |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 33.5k $360.3k | Added +33.4k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 33.2k $356.7k | New |
| Walleye Capital LLC 0.00% of their portfolio | 30.3k $325.1k | Reduced -33.1k |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio | 28.1k $301.8k | Unchanged |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 27.1k $291.3k | Reduced -348 |
| ProShare Advisors LLC 0.00% of their portfolio | 26.9k $288.4k | Reduced -9.2k |
| Mariner, LLC 0.00% of their portfolio | 26.5k $284.7k | Added +4.2k |
| COWEN AND COMPANY, LLC 0.01% of their portfolio | 25.0k $268.5k | New |
| Nordwand Advisors, LLC 0.12% of their portfolio | 25.0k $268.5k | Unchanged |
| Pictet Asset Management Holding SA 0.00% of their portfolio | 24.6k $264.4k | Unchanged |
| CAPSTONE INVESTMENT ADVISORS, LLC 0.01% of their portfolio | 24.6k $264.0k | Reduced -22.7k |
| Diametric Capital, LP 0.14% of their portfolio | 23.3k $250.5k | New |
| Kestra Advisory Services, LLC 0.00% of their portfolio | 22.9k $245.5k | Added +166 |