Cooperman Leon G’s Mirion Technologies MIR Stock Holding History

Cooperman Leon G’s Portfolio MIR Stock Details MIR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$156M	Hold	8,383,441	–	–	5.11%	4
2025 Q4	$196M	Hold	8,383,441	–	–	6.51%	4
2025 Q3	$195M	Buy	8,383,441 +1,258,441	+18%	+$27.2M	6.09%	5
2025 Q2	$153M	Buy	7,125,000 +100,000	+1%	+$1.72M	5.39%	5
2025 Q1	$102M	Hold	7,025,000	–	–	4.04%	7
2024 Q4	$123M	Sell	7,025,000 -1,000,000	-12%	-$15.5M	4.64%	7
2024 Q3	$88.8M	Buy	8,025,000 +25,000	+0.3%	+$263K	3.77%	11
2024 Q2	$85.9M	Buy	8,000,000 +486,600	+6%	+$5.17M	3.63%	12
2024 Q1	$85.4M	Hold	7,513,400	–	–	3.56%	13
2023 Q4	$77M	Buy	7,513,400 +113,400	+2%	+$957K	3.67%	13
2023 Q3	$55.3M	Hold	7,400,000	–	–	2.89%	14
2023 Q2	$62.5M	Buy	7,400,000 +951,427	+15%	+$7.72M	3.39%	13
2023 Q1	$55.1M	Buy	6,448,573 +82,500	+1%	+$655K	3.32%	14
2022 Q4	$42.1M	Buy	6,366,073 +1,162,753	+22%	+$7.83M	2.61%	15
2022 Q3	$38.9M	Hold	5,203,320	–	–	2.73%	15
2022 Q2	$30M	Buy	5,203,320 +1,766,965	+51%	+$13M	2.06%	15
2022 Q1	$27.7M	Buy	3,436,355 +436,355	+15%	+$3.76M	1.46%	22
2021 Q4	$31.4M	Buy	+3,000,000	New	+$32.2M	1.58%	21

Other funds holding MIR

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Cooperman Leon G's MIR Position: Q1 2026 in Review

Cooperman Leon G held its Mirion Technologies (MIR) position steady in Q1 2026 at 8,383,441 shares worth $156M. The position accounts for 5.11% of the portfolio, ranked #4.

Cooperman Leon G first reported a position in MIR in Q4 2021 and has held it in 18 quarters since. The position peaked at $196M in Q4 2025. 361 funds tracked by Wall St. Rank hold MIR as of Q1 2026.

Cooperman Leon G held 8,383,441 shares of Mirion Technologies worth $156M as of Q1 2026.
Cooperman Leon G left its Mirion Technologies share count unchanged in Q1 2026.
Mirion Technologies made up 5.11% of Cooperman Leon G's portfolio in Q1 2026, its #4 holding.
Cooperman Leon G first reported a position in Mirion Technologies in Q4 2021 and has held it in 18 quarters since.
Cooperman Leon G's Mirion Technologies position peaked at $196M in Q4 2025.
361 funds tracked by Wall St. Rank held Mirion Technologies as of Q1 2026.

Based on Cooperman Leon G's 13F filing for Q1 2026, filed 15 May 2026.