Quick Takeaways
- MIR - Mirion Technologies, Inc. has 21 insiders with reported activity on this page.
- Net insider value flow over the last year: -$43,267,219.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
Insider Transactions Reported by 21 Insiders of Mirion Technologies, Inc.
- Symbol
- MIR on NYSE
- Location
- Atlanta, GA
What Changed
- Buy value: ; sell value: $43,267,218.
- Net share flow: -1,979,666.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Official SEC Source
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$43,267,219.
Buys
$0
Shares: 0
Insiders: 0
Sells
$43,267,219
Shares: 1,979,666
Insiders: 5
Net
-$43,267,219
Shares: -1,979,666
Insiders: -5
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 807,500 | $0 | $20,136,946 | -$20,136,946 |
| 6-9 | 0 | 522,166 | $0 | $11,212,921 | -$11,212,921 |
| 9-12 | 0 | 650,000 | $0 | $11,917,352 | -$11,917,352 |
Mirion Technologies, Inc. executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| GS Sponsor II LLC | 10%+ Owner | $222,825,480 | Mixed | 04 Jun 2024 | ||
| Charterhouse General Partners (IX) Ltd | Former 10% Owner | $156,339,336 | Mixed | 07 Mar 2023 | ||
| Lawrence D. Kingsley | Director | $83,682,516 | -$24,775,550 | -23% | Mixed | 31 Mar 2026 |
| Thomas D. Logan | Chief Executive Officer, Director | $83,596,237 | -$10,740,783 | -11% | Mixed | 01 Apr 2026 |
| Brian Schopfer | Chief Financial Officer | $21,389,251 | -$5,710,423 | -21% | Mixed | 01 Apr 2026 |
| John W. Kuo | Director | $2,453,065 | Mixed | 11 Dec 2025 | ||
| Loic Eloy | Nuclear & Safety President | $2,434,693 | -$1,697,821 | -41% | Mixed | 02 Mar 2026 |
| Emmanuelle Lee | Chief Legal Officer | $1,930,534 | -$342,643 | -15% | Mixed | 01 Apr 2026 |
| Kenneth C. Bockhorst | Director | $1,678,397 | Mixed | 08 Dec 2025 | ||
| Jody Markopoulos | Director | $1,513,652 | Mixed | 30 Jun 2025 | ||
| Michael J. Rossi | Medical Group President | $1,214,008 | Mixed | 01 Nov 2023 | ||
| Steven W. Etzel | Director | $1,195,370 | Mixed | 15 May 2025 | ||
| Alison Ulrich | Chief Human Resources Officer | $848,623 | Mixed | 01 Apr 2026 | ||
| Robert Cascella | Director | $797,530 | Mixed | 15 May 2025 | ||
| Christopher A. Moore | Chief Accounting Officer (PAO) | $715,644 | Mixed | 01 Apr 2026 | ||
| Sheila Rege | Director | $634,435 | Mixed | 15 May 2025 | ||
| Jo Natauri | Director | $522,500 | Mixed | 20 Jun 2023 | ||
| GSAM Holdings LLC | Director, 10%+ Owner | Mixed | 08 Dec 2022 | |||
| Christopher L. Warren | Former Director | Mixed | 16 Sep 2022 | |||
| Michael Freed | Chief Operating Officer | Mixed | 20 Oct 2021 | |||
| Kipling Matas | Chief Accounting Officer | Mixed | 20 Oct 2021 |
Top shareholders of Mirion Technologies, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
|
Company |
15%
from 13D/G
|
38,199,968
|
$894,643,252 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
12%
|
30,346,328
|
$710,711,002 | — | 31 Dec 2025 | |
| T. Rowe Price Investment Management, Inc. |
13F
13D/G
|
Company |
6.1%
from 13D/G
|
15,112,855
|
$353,944,000 | — | 31 Dec 2025 | |
| KUWAIT INVESTMENT AUTHORITY ON BEHALF OF THE GOVT OF KUWAIT |
13D/G
|
Kuwait Investment Authority, acting for and on behalf of the Government of the State of Kuwait (KIA) |
4.1%
|
10,171,591
|
$238,218,661 | $0 | 29 Jul 2022 | |
| GS Sponsor II LLC |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
20,518,000
|
$222,825,480 | — | 04 Jun 2024 | |
| STATE STREET CORP |
13F
|
Company |
3.7%
|
9,198,795
|
$215,435,779 | — | 31 Dec 2025 | |
| FMR LLC |
13F
|
Company |
3.4%
|
8,414,300
|
$197,062,906 | — | 31 Dec 2025 | |
| Leon G. Cooperman |
13F
|
Individual |
3.4%
|
8,383,441
|
$196,340,188 | — | 31 Dec 2025 | |
| Charterhouse General Partners (IX) Ltd |
3/4/5
|
Former 10% Owner |
—
class O/S missing
|
14,960,702
|
$156,339,336 | — | 07 Mar 2023 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.3%
|
5,786,596
|
$135,545,437 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
2.1%
|
5,248,506
|
$122,920,011 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
2%
|
4,852,587
|
$113,647,588 | — | 31 Dec 2025 | |
| JANUS HENDERSON GROUP PLC |
13F
|
Company |
1.9%
|
4,596,949
|
$107,660,006 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.7%
|
4,102,558
|
$96,087,235 | — | 31 Dec 2025 | |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ |
13F
|
Company |
1.5%
|
3,663,479
|
$85,798,680 | — | 31 Dec 2025 | |
| Lawrence D. Kingsley |
3/4/5
|
Director |
1.4%
|
3,573,122
|
$83,682,516 | -$24,775,550 | 31 Mar 2026 | |
| Thomas D. Logan |
3/4/5
|
Chief Executive Officer, Director |
—
mixed-class rows
|
5,113,455
mixed-class rows
|
$83,596,237 | -$10,740,783 | 01 Apr 2026 | |
| Swedbank AB |
13F
|
Company |
1.4%
|
3,398,200
|
$79,585,844 | — | 31 Dec 2025 | |
| GSAM Holdings LLC |
13D/G
|
GOLDMAN SACHS GROUP INC |
2.3%
|
5,187,419
|
$77,448,166 | $0 | 17 Dec 2024 | |
| Invesco Ltd. |
13F
|
Company |
1.3%
|
3,101,120
|
$72,628,231 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
1.2%
|
3,076,945
|
$72,062,067 | — | 31 Dec 2025 | |
| Two Creeks Capital Management, LP |
13F
|
Company |
1.2%
|
2,923,802
|
$68,475,443 | — | 31 Dec 2025 | |
| LOOMIS SAYLES & CO L P |
13F
|
Company |
1.1%
|
2,845,619
|
$66,644,397 | — | 31 Dec 2025 | |
| Hood River Capital Management LLC |
13F
|
Company |
1.1%
|
2,780,137
|
$65,110,809 | — | 31 Dec 2025 | |
| AMERICAN CENTURY COMPANIES INC |
13F
|
Company |
1%
|
2,556,724
|
$59,878,517 | — | 31 Dec 2025 | |
| TCW GROUP INC |
13F
|
Company |
0.99%
|
2,452,579
|
$57,439,400 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.95%
|
2,344,241
|
$54,902,124 | — | 31 Dec 2025 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.94%
|
2,336,310
|
$54,716,381 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.94%
|
2,331,446
|
$54,602,466 | — | 31 Dec 2025 | |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.93%
|
2,299,122
|
$53,845,437 | — | 31 Dec 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.87%
|
2,147,984
|
$50,306,000 | — | 31 Dec 2025 | |
| LORD, ABBETT & CO. LLC |
13F
|
Company |
0.87%
|
2,143,558
|
$50,202,000 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.85%
|
2,096,858
|
$49,108,463 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.81%
|
2,012,912
|
$47,142,398 | — | 31 Dec 2025 | |
| Artemis Investment Management LLP |
13F
|
Company |
0.8%
|
1,971,711
|
$46,177,472 | — | 31 Dec 2025 | |
| Conestoga Capital Advisors, LLC |
13F
|
Company |
0.78%
|
1,938,849
|
$45,407,844 | — | 31 Dec 2025 | |
| FRANKLIN RESOURCES INC |
13F
|
Company |
0.76%
|
1,877,123
|
$43,962,223 | — | 31 Dec 2025 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.69%
|
1,707,659
|
$39,993,375 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
0.67%
|
1,670,064
|
$39,112,917 | — | 31 Dec 2025 | |
| Chescapmanager LLC |
13F
|
Company |
0.67%
|
1,659,137
|
$38,856,989 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.65%
|
1,620,793
|
$37,958,973 | — | 31 Dec 2025 | |
| BROWN ADVISORY INC |
13F
|
Company |
0.65%
|
1,613,051
|
$37,777,659 | — | 31 Dec 2025 | |
| RAYMOND JAMES FINANCIAL INC |
13F
|
Company |
0.62%
|
1,534,819
|
$36,255,650 | — | 31 Dec 2025 | |
| Alyeska Investment Group, L.P. |
13F
|
Company |
0.62%
|
1,531,217
|
$35,861,102 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.55%
|
1,358,870
|
$31,824,735 | — | 31 Dec 2025 | |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. |
13F
|
Company |
0.54%
|
1,332,550
|
$31,208,321 | — | 31 Dec 2025 | |
| SEGALL BRYANT & HAMILL, LLC |
13F
|
Company |
0.47%
|
1,169,689
|
$27,394,116 | — | 31 Dec 2025 | |
| Rockefeller Capital Management L.P. |
13F
|
Company |
0.46%
|
1,139,037
|
$26,676,247 | — | 31 Dec 2025 | |
| EMERALD ADVISERS, LLC |
13F
|
Company |
0.46%
|
1,137,146
|
$26,631,959 | — | 31 Dec 2025 | |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
|
Company |
0.43%
|
1,071,340
|
$25,090,783 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for Mirion Technologies, Inc.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Alison Ulrich | MIR | Class A Common Stock | Tax liability | -5.36% | -2,053 | 36,235 | 01 Apr 2026 | Direct | ||
| Brian Schopfer | MIR | Class A Common Stock | Tax liability | -0.8% | -7,377 | 913,290 | 01 Apr 2026 | Direct | ||
| Christopher A. Moore | MIR | Class A Common Stock | Tax liability | -5.86% | -1,903 | 30,557 | 01 Apr 2026 | Direct | ||
| Thomas D. Logan | MIR | Class A Common Stock | Tax liability | -5.85% | -22,614 | 364,060 | 01 Apr 2026 | Direct | ||
| Emmanuelle Lee | MIR | Class A Common Stock | Tax liability | -5.37% | -4,680 | 82,431 | 01 Apr 2026 | Direct | ||
| Lawrence D. Kingsley | MIR | Class A Common Stock | Award | 1.75% | 1,104 | 64,047 | 31 Mar 2026 | Direct | ||
| Loic Eloy | MIR | Class A Common Stock | Award | 15.9% | 15,577 | 113,347 | 02 Mar 2026 | Direct | ||
| Brian Schopfer | MIR | Class A Common Stock | Tax liability | -3% | -28,499 | 920,667 | 02 Mar 2026 | Direct | ||
| Brian Schopfer | MIR | Class A Common Stock | Award | 7.34% | 64,906 | 949,166 | 02 Mar 2026 | Direct | ||
| Thomas D. Logan | MIR | Class A Common Stock | Gift | -88.9% | -3,093,812 | 386,674 | 02 Mar 2026 | Direct | ||
| Thomas D. Logan | MIR | Class A Common Stock | Tax liability | -3.53% | -127,184 | 3,480,486 | 02 Mar 2026 | Direct | ||
| Thomas D. Logan | MIR | Class A Common Stock | Award | 9.69% | 318,632 | 3,607,670 | 02 Mar 2026 | Direct | ||
| Brian Schopfer | MIR | Class A Common Stock | Tax liability | -1.03% | -9,172 | 884,260 | 01 Mar 2026 | Direct | ||
| Alison Ulrich | MIR | Class A Common Stock | Tax liability | -5.81% | -2,360 | 38,288 | 01 Mar 2026 | Direct | ||
| Alison Ulrich | MIR | Class A Common Stock | Award | 15.8% | 5,552 | 40,648 | 01 Mar 2026 | Direct | ||
| Christopher A. Moore | MIR | Class A Common Stock | Tax liability | -4.13% | -1,397 | 32,460 | 01 Mar 2026 | Direct | ||
| Christopher A. Moore | MIR | Class A Common Stock | Award | 19.6% | 5,552 | 33,857 | 01 Mar 2026 | Direct | ||
| Emmanuelle Lee | MIR | Class A Common Stock | Tax liability | -3.53% | -3,184 | 87,111 | 01 Mar 2026 | Direct | ||
| Emmanuelle Lee | MIR | Class A Common Stock | Award | 14.7% | 11,568 | 90,295 | 01 Mar 2026 | Direct | ||
| Thomas D. Logan | MIR | Class A Common Stock | Tax liability | -0.62% | -20,650 | 3,289,038 | 01 Mar 2026 | Direct | ||
| Lawrence D. Kingsley | MIR | Class A Common Stock | Award | 1.3% | 806 | 62,943 | 31 Dec 2025 | Direct | ||
| Thomas D. Logan | MIR | Class A Common Stock | Tax liability | -1.19% | -39,863 | 3,309,688 | 27 Dec 2025 | Direct | ||
| Brian Schopfer | MIR | Class A Common Stock | Tax liability | -0.94% | -8,500 | 893,432 | 27 Dec 2025 | Direct | ||
| Emmanuelle Lee | MIR | Class A Common Stock | Tax liability | -6.99% | -5,913 | 78,727 | 27 Dec 2025 | Direct | ||
| Alison Ulrich | MIR | Class A Common Stock | Tax liability | -0.38% | -134 | 35,096 | 27 Dec 2025 | Direct | ||
| John W. Kuo | MIR | Class A Common Stock | Gift | -6.26% | -4,860 | 72,736 | 11 Dec 2025 | Direct | ||
| Lawrence D. Kingsley | MIR | Class A Common Stock | Sale | -9.07% | $8,654,800 | $24.73 | -350,000 | 3,509,075 | 10 Dec 2025 | By Lawrence D. Kingsley Revocable Trust |
| Kenneth Bockhorst | MIR | Class A Common Stock | Gift | -12.2% | -9,680 | 69,875 | 08 Dec 2025 | Direct | ||
| Brian Schopfer | MIR | Class A Common Stock | Gift | -0.01% | -100 | 901,932 | 08 Dec 2025 | Direct | ||
| Brian Schopfer | MIR | Class A Common Stock | Gift | -0.27% | -2,400 | 902,032 | 05 Dec 2025 | Direct | ||
| Lawrence D. Kingsley | MIR | Class A Common Stock | Gift | -1.05% | -40,925 | 3,859,075 | 24 Nov 2025 | By Lawrence D. Kingsley Revocable Trust | ||
| Lawrence D. Kingsley | MIR | Class A Common Stock | Sale | -7.14% | $7,148,400 | $23.83 | -300,000 | 3,900,000 | 21 Nov 2025 | By Lawrence D. Kingsley Revocable Trust |
| Loic Eloy | MIR | Class A Common Stock | Sale | -31.5% | $1,225,683 | $27.24 | -45,000 | 97,770 | 11 Nov 2025 | Direct |
| Emmanuelle Lee | MIR | Class A Common Stock | Sale | -12.9% | $342,642 | $27.41 | -12,500 | 84,640 | 10 Nov 2025 | Direct |
| Brian Schopfer | MIR | Class A Common Stock | Sale | -9.96% | $2,765,420 | $27.65 | -100,000 | 904,432 | 06 Nov 2025 | Direct |
| Brian Schopfer | MIR | Class B Common Stock | Disposed to Issuer | -20% | -100,000 | 399,935 | 06 Nov 2025 | Direct | ||
| Brian Schopfer | MIR | Class A Common Stock | Award | 11.1% | 100,000 | 1,004,432 | 06 Nov 2025 | Direct | ||
| Brian Schopfer | MIR | Class A Common Stock | Gift | -1.63% | -15,000 | 904,432 | 30 Oct 2025 | Direct | ||
| Thomas D. Logan | MIR | Class A Common Stock | Gift | -3.07% | -106,188 | 3,349,551 | 30 Oct 2025 | Direct | ||
| Lawrence D. Kingsley | MIR | Class A Common Stock | Award | 1.39% | 850 | 62,137 | 30 Sep 2025 | Direct | ||
| Thomas D. Logan | MIR | Class A Common Stock | Sale | -4.68% | $3,813,635 | $21.79 | -175,000 | 3,567,305 | 12 Aug 2025 | Direct |
| Thomas D. Logan | MIR | Class A Common Stock | Sale | -7.99% | $6,927,148 | $21.31 | -325,000 | 3,742,305 | 11 Aug 2025 | Direct |
| Loic Eloy | MIR | Class A Common Stock | Sale | -13.4% | $472,138 | $21.30 | -22,166 | 142,770 | 05 Aug 2025 | Direct |
| Jody Markopoulos | MIR | Class A Common Stock | Award | 1.2% | 880 | 74,126 | 30 Jun 2025 | Direct | ||
| John W. Kuo | MIR | Class A Common Stock | Award | 1.34% | 1,024 | 77,596 | 30 Jun 2025 | Direct | ||
| Brian Schopfer | MIR | Class A Common Stock | Sale | -7.54% | $1,575,000 | $21.00 | -75,000 | 919,432 | 25 Jun 2025 | Direct |
| Brian Schopfer | MIR | Class B Common Stock | Disposed to Issuer | -13% | -75,000 | 499,935 | 25 Jun 2025 | Direct | ||
| Brian Schopfer | MIR | Class A Common Stock | Award | 8.16% | 75,000 | 994,432 | 25 Jun 2025 | Direct | ||
| Lawrence D. Kingsley | MIR | Class A Common Stock | Sale | -100% | $2,691,600 | $17.94 | -150,000 | 0 | 21 May 2025 | By Lawrence D. Kingsley 2015 Family Irrevocable Trust |
| Lawrence D. Kingsley | MIR | Class A Common Stock | Sale | -100% | $6,280,750 | $17.94 | -350,000 | 0 | 21 May 2025 | By Diane Kingsley Revocable Trust |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.