PEAK6’s Mirion Technologies MIR Stock Holding History

PEAK6’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	$719K	Sell	40,100 -132,900	-77%	-$2.46M	﹤0.01%	1828
2026 Q1	$3.22M	Sell	173,000 -600	-0.3%	-$13.5K	0.01%	1116
2025 Q4	$4.07M	Sell	173,600 -221,900	-56%	-$5.53M	0.01%	1047
2025 Q3	$9.2M	Buy	395,500 +170,300	+76%	+$3.68M	0.01%	729
2025 Q2	$4.85M	Sell	225,200 -56,900	-20%	-$981K	0.01%	974
2025 Q1	$4.09M	Sell	282,100 -55,900	-17%	-$879K	0.01%	1037
2024 Q4	$5.9M	Buy	+338,000	New	+$5.24M	0.01%	820

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 $3.38T AUM 44.17% 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 $15.4B AUM 30.35% 1-Year Est. Return

PEAK6's MIR Position: Q2 2026 in Review

PEAK6 sold out of Mirion Technologies (MIR) in Q2 2026, closing a stake of 50,935 shares — an estimated $945K sold.

PEAK6 first reported a position in MIR in Q4 2025 and held it in 2 quarters. The position peaked at $947K in Q1 2026. 351 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

PEAK6 reported no remaining Mirion Technologies position as of Q2 2026 after selling out during the quarter.
PEAK6 sold 50,935 Mirion Technologies shares in Q2 2026, an estimated $945K.
PEAK6 first reported a position in Mirion Technologies in Q4 2025 and held it in 2 quarters.
PEAK6's Mirion Technologies position peaked at $947K in Q1 2026.
351 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on PEAK6's 13F filing for Q2 2026, filed 13 Aug 2026.