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	$192K	Buy	+10,692	New	+$198K	﹤0.01%	3151
2025 Q4	–	Sell	-2,463	Closed	-$61.4K	–	4662
2025 Q3	$57.3K	Sell	2,463 -6,710	-73%	-$145K	﹤0.01%	3920
2025 Q2	$197K	Buy	+9,173	New	+$158K	﹤0.01%	3247
2025 Q1	–	Sell	-296,844	Closed	-$5.18M	–	4467
2024 Q4	$5.18M	Buy	+296,844	New	+$4.6M	0.01%	1122
2024 Q2	–	Sell	-20,970	Closed	-$238K	–	4680
2024 Q1	$238K	Buy	+20,970	New	+$210K	﹤0.01%	3328
2023 Q4	–	Sell	-18,213	Closed	-$154K	–	5329
2023 Q3	$136K	Buy	+18,213	New	+$144K	﹤0.01%	3822
2023 Q2	–	Sell	-4,212	Closed	-$34.2K	–	4979
2023 Q1	$36K	Buy	+4,212	New	+$33.4K	﹤0.01%	4149
2021 Q4	–	Sell	-273,353	Closed	-$2.79M	–	5657
2021 Q3	$2.79M	Sell	273,353 -324,519	-54%	-$3.27M	0.01%	1337
2021 Q2	$6.22M	Buy	+597,872	New	+$6.15M	0.02%	675
2021 Q1	–	Sell	-80,802	Closed	-$881K	–	5099
2020 Q4	$881K	Sell	80,802 -8,339	-9%	-$86.1K	﹤0.01%	2104
2020 Q3	$959K	Buy	+89,141	New	+$925K	0.01%	1683

Other funds holding MIR

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

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

CAM

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

Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return

TCW Group Los Angeles, California $14.9B AUM 46.29% 1-Year Est. Return

SIMG

Stephens Investment Management Group Houston, Texas $9.33B AUM 56.1% 1-Year Est. Return

TCM

TimesSquare Capital Management New York $6.8B AUM 45.85% 1-Year Est. Return

Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return

Emerald Advisers Leola, Pennsylvania $4.25B AUM 141.71% 1-Year Est. Return

CCA

Conestoga Capital Advisors Wayne, Pennsylvania $4.6B AUM 16.08% 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. 145 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.
145 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.