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 Q2	$136K	Sell	7,600 -1,500	-16%	-$27.8K	﹤0.01%	3285
2026 Q1	$169K	Sell	9,100 -100	-1%	-$2.26K	﹤0.01%	3217
2025 Q4	$215K	Sell	9,200 -26,800	-74%	-$668K	﹤0.01%	3352
2025 Q3	$837K	Sell	36,000 -113,600	-76%	-$2.46M	﹤0.01%	2390
2025 Q2	$3.22M	Buy	+149,600	New	+$2.58M	0.01%	1454
2025 Q1	–	Sell	-4,300	Closed	-$75K	–	4468
2024 Q4	$75K	Buy	+4,300	New	+$66.7K	﹤0.01%	3669
2024 Q2	–	Sell	-19,200	Closed	-$218K	–	4681
2024 Q1	$218K	Sell	19,200 -39,800	-67%	-$399K	﹤0.01%	3376
2023 Q4	$605K	Buy	59,000 +10,400	+21%	+$87.8K	﹤0.01%	2910
2023 Q3	$363K	Buy	+48,600	New	+$383K	﹤0.01%	3218
2021 Q4	–	Sell	-54,500	Closed	-$557K	–	5658
2021 Q3	$557K	Buy	54,500 +29,500	+118%	+$298K	﹤0.01%	2801
2021 Q2	$260K	Buy	+25,000	New	+$257K	﹤0.01%	3654

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

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

Congress Asset Management Boston, Massachusetts $15.4B AUM 30.35% 1-Year Est. Return

Walleye Trading's MIR Position: Q2 2026 in Review

Walleye Trading opened a new position in Mirion Technologies (MIR) in Q2 2026: 10,692 shares worth $192K. The stake represents ﹤0.01% of the portfolio and ranks #3151 among its holdings. This is a return to the name: Walleye Trading previously reported a position in MIR as recently as Q3 2025.

Walleye Trading first reported a position in MIR in Q3 2020 and has held it in 11 quarters since. The position peaked at $6.22M in Q2 2021. 351 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

Walleye Trading held 10,692 shares of Mirion Technologies worth $192K as of Q2 2026.
Mirion Technologies was a new Walleye Trading position in Q2 2026.
Mirion Technologies made up ﹤0.01% of Walleye Trading's portfolio in Q2 2026, its #3151 holding.
Walleye Trading first reported a position in Mirion Technologies in Q3 2020 and has held it in 11 quarters since.
Walleye Trading's Mirion Technologies position peaked at $6.22M in Q2 2021.
351 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on Walleye Trading's 13F filing for Q2 2026, filed 3 Aug 2026.