Walleye Trading’s Mirion Technologies MIR Stock Holding History

Walleye Trading’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	$444K	Sell	23,900 -21,800	-48%	-$492K	﹤0.01%	2669
2025 Q4	$1.07M	Sell	45,700 -95,000	-68%	-$2.37M	﹤0.01%	2332
2025 Q3	$3.27M	Buy	140,700 +15,900	+13%	+$344K	0.01%	1492
2025 Q2	$2.69M	Buy	+124,800	New	+$2.15M	﹤0.01%	1554
2025 Q1	–	Sell	-9,900	Closed	-$173K	–	4466
2024 Q4	$173K	Buy	+9,900	New	+$154K	﹤0.01%	3299
2024 Q2	–	Sell	-200	Closed	-$2.27K	–	4679
2024 Q1	$2.27K	Sell	200 -60,800	-100%	-$609K	﹤0.01%	4510
2023 Q4	$625K	Hold	61,000	–	–	﹤0.01%	2876
2023 Q3	$456K	Buy	61,000 +50,300	+470%	+$396K	﹤0.01%	3029
2023 Q2	$90.4K	Sell	10,700 -2,400	-18%	-$19.5K	﹤0.01%	3781
2023 Q1	$112K	Buy	+13,100	New	+$104K	﹤0.01%	3801
2021 Q4	–	Sell	-27,400	Closed	-$280K	–	5656
2021 Q3	$280K	Buy	+27,400	New	+$276K	﹤0.01%	3522

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

Walleye Trading's MIR Position: Q4 2025 in Review

Walleye Trading sold out of Mirion Technologies (MIR) in Q4 2025, closing a stake of 2,463 shares — an estimated $61.4K sold.

Walleye Trading first reported a position in MIR in Q3 2020 and held it in 10 quarters. The position peaked at $6.22M in Q2 2021. 365 funds tracked by Wall St. Rank hold MIR as of Q4 2025.

Walleye Trading reported no remaining Mirion Technologies position as of Q4 2025 after selling out during the quarter.
Walleye Trading sold 2,463 Mirion Technologies shares in Q4 2025, an estimated $61.4K.
Walleye Trading first reported a position in Mirion Technologies in Q3 2020 and held it in 10 quarters.
Walleye Trading's Mirion Technologies position peaked at $6.22M in Q2 2021.
365 funds tracked by Wall St. Rank held Mirion Technologies as of Q4 2025.

Based on Walleye Trading's 13F filing for Q4 2025, filed 13 Feb 2026.