Mirion Technologies
Supplies radiation measurement and safety systems for nuclear operations, cancer care, laboratories, and defense.
$14.66
After-hours close+0.29 (+2.02%)
At close$14.37(−3.23%)
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Breakdown13F · Form 4
Institutions 110.56%Insiders 2.32%
A 13F quarter can total more than the shares outstanding — sub-advisers file the same block twice, and a filer's own share count can be a quarter stale. No split is drawn from it.
Shares outstanding 243.28M · Float 223.97M · 92.1% free float
Institutions13F, as of Jun 30, 2026
374 holders · 268.97M shares · 61 new positions · 201 increased · 120 reduced · 69 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 38.26M | 15.73% | +404.6K | Aug 7, 2026 |
| Vanguard Portfolio Management LLC | 18.18M | 7.47% | +274.1K | Aug 13, 2026 |
| T. Rowe Price Investment Management, Inc. | 14.29M | 5.87% | −339.7K | Aug 14, 2026 |
| Vanguard Capital Management LLC | 10.61M | 4.36% | +108.7K | Aug 13, 2026 |
| Goldman Sachs Group Inc | 10.41M | 4.28% | +3.06M | Aug 14, 2026 |
| State Street Corp | 9.92M | 4.08% | +493.6K | Aug 7, 2026 |
| Alyeska Investment Group, L.P. | 9.53M | 3.92% | +6.83M | Aug 14, 2026 |
| Cooperman Leon G | 8.38M | 3.45% | 0 | Aug 14, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 14.80% | 35.69M | 13G | Oct 2, 2025 ↗ |
| Vanguard Portfolio Management | 7.40% | 18.12M | 13G | Apr 29, 2026 ↗ |
| T. Rowe Price Investment Management, Inc. | 6.10% | 15.11M | 13G | Feb 17, 2026 ↗ |
| Vanguard Capital Management | 5.03% | 12.33M | 13G | Apr 30, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Lawrence D. Kingsley | director | 3.58M | 1.47% | Jun 30, 2026 |
| Brian Schopfer | officer: Chief Financial Officer | 1.31M | 0.54% | Apr 2, 2026 |
| Loic Eloy | officer: Nuclear & Safety President | 113.3K | 0.05% | Mar 3, 2026 |
| Steven W. Etzel | director | 87.4K | 0.04% | May 14, 2026 |
| Emmanuelle Lee | officer: Chief Legal Officer | 82.4K | 0.03% | Apr 2, 2026 |
| Jody Markopoulos | director | 81.5K | 0.03% | May 14, 2026 |
| John W. Kuo | director | 80.1K | 0.03% | May 14, 2026 |
| Kenneth Bockhorst | director | 77.3K | 0.03% | May 14, 2026 |
| Robert Cascella | director | 60.8K | 0.02% | May 14, 2026 |
| Thomas D. Logan | director, officer: Chief Executive Officer | 52.2K | 0.02% | May 7, 2026 |
6 ten-percent owners hold 72.58M shares by Form 4, outside the officers-and-directors figure above · 20 people have not refiled in the last 18 months (7.80M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| May 7, 2026 | Christopher A. Mooreofficer: Chief Accounting Officer (PAO) | Sale | 8,400 | $19.64 | 22,157 |
| Dec 10, 2025 | Lawrence D. Kingsleydirector | Sale | 350,000 | $24.73 | 3,509,075 |
| Nov 21, 2025 | Lawrence D. Kingsleydirector | Sale | 300,000 | $23.83 | 3,900,000 |
| Nov 10, 2025 | Emmanuelle Leeofficer: Chief Legal Officer | Sale | 12,500 | $27.41 | 84,640 |
| Nov 11, 2025 | Loic Eloyofficer: Nuclear & Safety President | Sale | 45,000 | $27.24 | 97,770 |
| Nov 6, 2025 | Brian Schopferofficer: Chief Financial Officer | Sale · 2 lots | 100,000 | $27.65 | 904,432 |
CongressHouse and Senate disclosures
Not reported.