DaveManuel.com · Institutional Ownership · Who Owns It
MIRION TECHNOLOGIES INC (MIR)
Institutional ownership reported to the SEC as of Q2 2026, across 22 quarters.
363
Reporting holders
$4.8B
Reported value
2.7%
Calls
0.3%
Puts
-8
Holder change
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $686.0M | 38,262,307 | 0.01% | 8q | +1.1%+$7.3M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $326.0M | 18,179,850 | 0.01% | 2q | +1.5%+$4.9M |
| T. Rowe Price Investment Management, Inc. | $256.2M | 14,288,075 | 0.17% | 14q | -2.3%-$6.1M |
| VANGUARD CAPITAL MANAGEMENT LLC | $190.3M | 10,613,869 | 0.00% | 2q | +1.0%+$1.9M |
| GOLDMAN SACHS GROUP INC | $186.6M | 10,406,605 | 0.02% | 19q | +41.6%+$54.8M |
| STATE STREET CORP | $177.9M | 9,923,609 | 0.01% | 19q | +5.2%+$8.9M |
| Alyeska Investment Group, L.P. | $171.0M | 9,534,955 | 0.44% | 19q | +252.9%+$122.5M |
| COOPERMAN LEON G | $150.3M | 8,383,441 | 4.24% | 19q | HELD |
| FMR LLC | $131.4M | 7,329,386 | 0.01% | 19q | +11.9%+$13.9M |
| CONGRESS ASSET MANAGEMENT CO | $119.9M | 6,685,434 | 0.74% | 2q | +500.1%+$99.9M |
| GEODE CAPITAL MANAGEMENT, LLC | $112.6M | 6,280,048 | 0.01% | 19q | +5.7%+$6.1M |
| MAVERICK CAPITAL LTD | $94.0M | 5,245,039 | 0.83% | 2q | +97.9%+$46.5M |
| DIMENSIONAL FUND ADVISORS LP | $87.1M | 4,859,755 | 0.02% | 13q | +3.5%+$3.0M |
| Jupiter Topco LLC | $73.8M | 4,114,766 | 0.03% | new | FIRST |
| BAMCO INC /NY/ | $70.0M | 3,906,083 | 0.11% | 4q | +221.8%+$48.3M |
| MORGAN STANLEY | $69.9M | 3,896,754 | 0.00% | 19q | +70.5%+$28.9M |
| NEUBERGER BERMAN GROUP LLC | $57.4M | 3,199,539 | 0.04% | 3q | +273.6%+$42.0M |
| AMERICAN CENTURY COMPANIES INC | $57.0M | 3,176,241 | 0.03% | 13q | +16.2%+$8.0M |
| Invesco Ltd. | $49.7M | 2,769,589 | 0.00% | 18q | +20.7%+$8.5M |
| UBS Group AG | $48.2M | 2,686,713 | 0.01% | 19q | -28.7%-$19.4M |
| NORTHERN TRUST CORP | $46.4M | 2,586,059 | 0.01% | 19q | +9.3%+$3.9M |
| JPMORGAN CHASE & CO | $45.7M | 2,606,507 | 0.00% | 17q | HELD |
| Swedbank AB | $45.4M | 2,531,200 | 0.04% | 18q | -19.9%-$11.3M |
| LOOMIS SAYLES & CO L P | $45.3M | 2,525,188 | 0.06% | 5q | -5.4%-$2.6M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $43.9M | 2,447,222 | 0.01% | 19q | +7.5%+$3.0M |
| TCW GROUP INC | $40.4M | 2,255,645 | 0.27% | 3q | +0.8%+$308.7K |
| Nuveen, LLC | $37.8M | 2,109,181 | 0.01% | 6q | +8.2%+$2.9M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $32.3M incl. $31.8M options CALL+PUT | 26,559 | 0.00% | 19q | -83.5%-$163.7M |
| ROYAL BANK OF CANADA | $32.0M | 1,782,618 | 0.00% | 18q | -9.1%-$3.2M |
| VANGUARD FIDUCIARY TRUST CO | $30.9M | 1,723,956 | 0.01% | 2q | +1.7%+$527.5K |
| Stephens Investment Management Group LLC | $30.1M | 1,678,373 | 0.32% | 3q | +22.1%+$5.4M |
| Chescapmanager LLC | $29.7M | 1,659,137 | 2.53% | 10q | HELD |
| Davidson Kempner Capital Management LP | $29.0M | 1,619,998 | 0.35% | 4q | +23.2%+$5.5M |
| Select Equity Group, L.P. | $28.3M | 1,576,023 | 0.14% | 14q | +49.3%+$9.3M |
| SCHRODER INVESTMENT MANAGEMENT GROUP | $27.8M | 1,594,840 | 0.02% | 7q | +40.4%+$8.0M |
| Troluce Capital Advisors LLC | $27.6M | 1,539,212 | 2.84% | 3q | +2.6%+$703.1K |
| Rockefeller Capital Management L.P. | $26.3M | 1,466,144 | 0.04% | 6q | +5.3%+$1.3M |
| TimesSquare Capital Management, LLC | $25.1M | 1,400,642 | 0.37% | 4q | +8.2%+$1.9M |
| Caption Management, LLC | $25.1M incl. $24.3M options CALL | 40,000 | 0.12% | 2q | HELD |
| Bank of New York Mellon Corp | $24.8M | 1,381,674 | 0.00% | 19q | -69.5%-$56.6M |
| EMERALD ADVISERS, LLC | $24.5M | 1,364,780 | 0.58% | 7q | -1.2%-$301.1K |
| CITIGROUP INC | $22.4M incl. $11.7M options CALL | 598,776 | 0.01% | 17q | -42.9%-$16.8M |
| Conestoga Capital Advisors, LLC | $22.4M | 1,248,061 | 0.49% | 4q | -31.8%-$10.5M |
| RAYMOND JAMES FINANCIAL INC | $21.5M | 1,196,716 | 0.01% | 7q | +11.3%+$2.2M |
| PRINCIPAL FINANCIAL GROUP INC | $21.4M | 1,194,106 | 0.01% | 19q | HELD |
| ROYAL LONDON ASSET MANAGEMENT LTD | $21.1M | 1,176,241 | 0.04% | new | NEW |
| BANK OF AMERICA CORP /DE/ | $20.8M | 1,158,094 | 0.00% | 19q | -14.6%-$3.5M |
| SEGALL BRYANT & HAMILL, LLC | $20.3M | 1,131,124 | 0.24% | 9q | +1.7%+$345.2K |
| WELLINGTON MANAGEMENT GROUP LLP | $19.7M | 1,098,987 | 0.00% | 3q | +31.2%+$4.7M |
| Clearbridge Investments, LLC | $19.7M | 1,096,729 | 0.02% | new | NEW |
| AMERIPRISE FINANCIAL INC | $18.0M | 1,002,284 | 0.00% | 7q | -22.3%-$5.2M |
| MILLENNIUM MANAGEMENT LLC | $17.8M | 991,741 | 0.01% | 2q | -80.6%-$73.8M |
| JENNISON ASSOCIATES LLC | $15.9M | 887,170 | 0.01% | 9q | -5.9%-$995.6K |
| FRANKLIN RESOURCES INC | $15.9M | 884,482 | 0.00% | 5q | -55.7%-$19.9M |
| EMERALD MUTUAL FUND ADVISERS TRUST | $15.7M | 873,466 | 0.55% | 7q | HELD |
| CORSAIR CAPITAL MANAGEMENT, L.P. | $15.6M | 867,670 | 1.94% | 19q | -11.7%-$2.1M |
| SEI INVESTMENTS CO | $15.2M | 849,475 | 0.01% | 7q | +85.3%+$7.0M |
| Allspring Global Investments Holdings, LLC | $15.2M | 846,790 | 0.02% | 10q | -20.0%-$3.8M |
| Tidal Investments LLC | $15.1M | 840,683 | 0.03% | 6q | +8.5%+$1.2M |
| Public Sector Pension Investment Board | $15.1M | 840,519 | 0.04% | 4q | -4.0%-$623.4K |
| Parallax Volatility Advisers, L.P. | $15.0M incl. $14.3M options CALL | 38,018 | 0.03% | new | NEW |
| SILVERCREST ASSET MANAGEMENT GROUP LLC | $14.6M | 813,203 | 0.10% | 7q | +19.5%+$2.4M |
| FEDERATED HERMES, INC. | $14.3M | 797,538 | 0.02% | 4q | -2.3%-$339.0K |
| D. E. Shaw & Co., Inc. | $14.1M incl. $6.9M options PUT | 400,454 | 0.01% | 7q | -14.5%-$2.4M |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $13.6M | 760,985 | 0.00% | 5q | -52.1%-$14.9M |
| WELLS FARGO & COMPANY/MN | $12.8M | 713,358 | 0.00% | 19q | +5.1%+$626.1K |
| NOMURA HOLDINGS INC | $12.7M | 709,604 | 0.01% | 5q | -7.2%-$985.4K |
| Pier Capital, LLC | $12.5M | 696,047 | 1.65% | 7q | -1.1%-$139.2K |
| DEUTSCHE BANK AG\ | $12.3M | 684,849 | 0.00% | 17q | +11.7%+$1.3M |
| Point72 Asset Management, L.P. | $12.2M incl. $3.6K options CALL | 677,509 | 0.01% | 3q | +288.8%+$9.0M |
| OSAIC HOLDINGS, INC. | $12.0M | 670,489 | 0.01% | 19q | +262.3%+$8.7M |
| Aberdeen Group plc | $11.3M | 627,585 | 0.02% | 2q | +37.5%+$3.1M |
| ExodusPoint Capital Management, LP | $10.9M | 605,134 | 0.07% | new | NEW |
| JANE STREET GROUP, LLC | $10.8M CALL+PUT | options only | 0.00% | 19q | OPTIONS |
| NISSAY ASSET MANAGEMENT CORP /JAPAN | $10.7M | 599,278 | 0.05% | new | NEW |
| ArrowMark Colorado Holdings LLC | $10.5M | 588,240 | 0.44% | 17q | +2.3%+$234.6K |
| WCM INVESTMENT MANAGEMENT, LLC | $10.3M | 591,279 | 0.02% | new | NEW |
| SCHWARTZ INVESTMENT COUNSEL INC | $10.3M | 573,910 | 0.34% | 18q | -32.8%-$5.0M |
| RHUMBLINE ADVISERS | $10.2M | 568,321 | 0.01% | 17q | -10.4%-$1.2M |
| IMC-Chicago, LLC | $9.8M CALL+PUT | options only | 0.00% | 5q | OPTIONS |
| Legal & General Group Plc | $9.7M | 542,835 | 0.00% | 17q | -2.4%-$234.4K |
| HRT FINANCIAL LP | $9.7M incl. $3.6M options OPT | 539,916 | 0.02% | new | NEW |
| GAMCO INVESTORS, INC. ET AL | $9.6M | 535,270 | 0.09% | 19q | -1.7%-$168.4K |
| CITADEL ADVISORS LLC | $9.0M incl. $8.5M options CALL+PUT | 32,796 | 0.00% | 19q | -98.2%-$493.6M |
| PEREGRINE CAPITAL MANAGEMENT LLC | $9.0M | 502,843 | 0.29% | 4q | +8.8%+$725.4K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $8.6M | 480,488 | 0.00% | 17q | -5.3%-$478.7K |
| Swiss National Bank | $8.4M | 465,900 | 0.00% | 17q | HELD |
| BNP PARIBAS FINANCIAL MARKETS | $8.1M | 450,934 | 0.00% | 7q | -59.4%-$11.8M |
| Robeco Schweiz AG | $7.6M | 424,000 | 0.12% | 5q | +84.3%+$3.5M |
| PRICE T ROWE ASSOCIATES INC /MD/ | $7.6M | 421,193 | 0.00% | 17q | +10.0%+$688.7K |
| EXCHANGE TRADED CONCEPTS, LLC | $7.5M | 420,398 | 0.03% | 10q | +3.3%+$240.5K |
| SG Americas Securities, LLC | $7.5M incl. $5.1M options CALL | 134,473 | 0.00% | 5q | +421.6%+$6.1M |
| Montanaro Asset Management Ltd | $7.5M | 418,646 | 2.37% | 4q | +37.1%+$2.0M |
| ZEVENBERGEN CAPITAL INVESTMENTS LLC | $7.2M | 400,300 | 0.16% | 5q | +22.7%+$1.3M |
| LAZARD ASSET MANAGEMENT LLC | $7.0M | 392,003 | 0.01% | 11q | +21.6%+$1.2M |
| TD Asset Management Inc | $7.0M | 389,798 | 0.01% | 14q | +12.0%+$747.7K |
| ENVESTNET ASSET MANAGEMENT INC | $6.9M | 386,193 | 0.00% | 9q | +14.0%+$852.3K |
| BANK OF NOVA SCOTIA | $6.7M | 373,629 | 0.01% | 3q | -1.7%-$117.6K |
| Bridgewater Associates, LP | $6.4M | 359,138 | 0.03% | 3q | +2.1%+$131.8K |
| GABELLI FUNDS LLC | $6.3M | 351,160 | 0.04% | 19q | -4.6%-$301.6K |
Showing the largest 100 of 363 reported holders.
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-02 | Schopfer Brian | Chief Financial Officer | Bought | 20,000 | $312.0K |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 81 | $168.2M | 11,881,572 | 12 | 22 | 32 | 0.0% |
| Q2 2026 | 363 | $4.8B | 262,363,572 | 59 | 138 | 116 | 3.1% |
| Q1 2026 | 371 | $4.8B | 253,707,601 | 56 | 132 | 130 | 1.8% |
| Q4 2025 | 376 | $6.2B | 254,541,672 | 73 | 141 | 96 | 3.7% |
| Q3 2025 | 345 | $6.1B | 255,296,640 | 92 | 123 | 90 | 2.0% |
| Q2 2025 | 307 | $4.6B | 209,101,215 | 104 | 111 | 63 | 2.8% |
| Q1 2025 | 232 | $2.7B | 185,433,294 | 44 | 91 | 64 | 0.7% |
| Q4 2024 | 224 | $3.4B | 193,984,345 | 65 | 80 | 53 | 1.2% |
| Q3 2024 | 176 | $2.3B | 205,343,016 | 33 | 71 | 43 | 0.1% |
| Q2 2024 | 157 | $2.1B | 199,065,571 | 32 | 56 | 41 | 0.1% |
| Q1 2024 | 145 | $2.2B | 192,746,184 | 27 | 46 | 42 | 1.0% |
| Q4 2023 | 131 | $2.0B | 191,460,505 | 16 | 47 | 41 | 1.5% |
| Q3 2023 | 128 | $1.4B | 189,580,806 | 15 | 60 | 26 | 1.3% |
| Q2 2023 | 125 | $1.6B | 182,938,933 | 18 | 66 | 16 | 0.9% |
| Q1 2023 | 119 | $1.6B | 180,477,203 | 16 | 44 | 36 | 1.0% |
| Q4 2022 | 119 | $1.0B | 153,852,090 | 17 | 35 | 43 | 0.8% |
| Q3 2022 | 118 | $40.1B | 5,369,737,055 | 18 | 41 | 34 | 0.0% |
| Q2 2022 | 114 | $32.1B | 5,574,283,474 | 43 | 36 | 21 | 0.0% |
| Q1 2022 | 108 | $28.9B | 3,575,268,852 | 33 | 31 | 27 | 0.1% |
| Q4 2021 | 96 | $1.5B | 142,276,249 | 94 | 0 | 0 | 2.3% |
| Q3 2021 | 4 | $36.8M | 3,604,935 | 3 | 0 | 0 | 0.0% |
| Q2 2021 | 1 | $20.8M | 2,000,000 | 1 | 0 | 0 | 0.0% |