Rockefeller Capital Management’s Mirion Technologies MIR Stock Holding History

Rockefeller Capital Management’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	$25.9M	Buy	1,392,724 +253,687	+22%	+$5.72M	0.05%	377
2025 Q4	$26.7M	Buy	1,139,037 +167,454	+17%	+$4.18M	0.05%	361
2025 Q3	$22.6M	Sell	971,583 -90,775	-9%	-$1.96M	0.04%	377
2025 Q2	$22.9M	Buy	1,062,358 +124,121	+13%	+$2.14M	0.05%	350
2025 Q1	$13.6M	Buy	+938,237	New	+$14.7M	0.03%	476
2021 Q2	–	Sell	-500	Closed	-$5K	–	3536
2021 Q1	$5K	Buy	+500	New	+$5.87K	﹤0.01%	2898

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

CLG

Cooperman Leon G $3.05B AUM 42.78% 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

Rockefeller Capital Management's MIR Position: Q1 2026 in Review

Rockefeller Capital Management increased its Mirion Technologies (MIR) stake by 22% in Q1 2026, buying an estimated $5.72M and bringing the position to 1,392,724 shares worth $25.9M. The position accounts for 0.05% of the portfolio, ranked #377.

Rockefeller Capital Management first reported a position in MIR in Q1 2021 and has held it in 6 quarters since. The position peaked at $26.7M in Q4 2025. 361 funds tracked by Wall St. Rank hold MIR as of Q1 2026.

Rockefeller Capital Management held 1,392,724 shares of Mirion Technologies worth $25.9M as of Q1 2026.
Rockefeller Capital Management bought 253,687 Mirion Technologies shares in Q1 2026, an estimated $5.72M.
Mirion Technologies made up 0.05% of Rockefeller Capital Management's portfolio in Q1 2026, its #377 holding.
Rockefeller Capital Management first reported a position in Mirion Technologies in Q1 2021 and has held it in 6 quarters since.
Rockefeller Capital Management's Mirion Technologies position peaked at $26.7M in Q4 2025.
361 funds tracked by Wall St. Rank held Mirion Technologies as of Q1 2026.

Based on Rockefeller Capital Management's 13F filing for Q1 2026, filed 14 May 2026.