Alta Park Capital’s Mirion Technologies MIR Stock Holding History

Alta Park Capital’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 Q2	–	Sell	-977,138	Closed	-$18.2M	–	32
2026 Q1	$18.2M	Buy	977,138 +414,616	+74%	+$9.35M	2.83%	22
2025 Q4	$13.2M	Sell	562,522 -48,639	-8%	-$1.21M	1.59%	29
2025 Q3	$14.2M	Buy	+611,161	New	+$13.2M	1.24%	33

Other funds holding MIR

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return

CLG

Cooperman Leon G $3.55B AUM 41.85% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

CAM

Congress Asset Management Boston, Massachusetts $16.3B AUM 42.69% 1-Year Est. Return

Alta Park Capital's MIR Position: Q2 2026 in Review

Alta Park Capital sold out of Mirion Technologies (MIR) in Q2 2026, closing a stake of 977,138 shares — an estimated $18.2M sold.

Alta Park Capital first reported a position in MIR in Q3 2025 and held it in 3 quarters. The position peaked at $18.2M in Q1 2026. 352 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

Alta Park Capital reported no remaining Mirion Technologies position as of Q2 2026 after selling out during the quarter.
Alta Park Capital sold 977,138 Mirion Technologies shares in Q2 2026, an estimated $18.2M.
Alta Park Capital first reported a position in Mirion Technologies in Q3 2025 and held it in 3 quarters.
Alta Park Capital's Mirion Technologies position peaked at $18.2M in Q1 2026.
352 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on Alta Park Capital's 13F filing for Q2 2026, filed 14 Aug 2026.