Walleye Trading
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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 		$909K Buy
50,700
+26,800
+112% +$497K ﹤0.01% 2351
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
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return
Cooperman Leon G
Cooperman Leon G $3.55B AUM 41.85% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Congress Asset Management
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.