State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s Mirion Technologies MIR Stock Holding History

State of Wisconsin Investment Board’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 		$4.51M Buy
242,812
+16,278
+7% +$367K 0.01% 1032
2025
Q4 		$5.31M Buy
226,534
+89,775
+66% +$2.24M 0.01% 978
2025
Q3 		$3.18M Sell
136,759
-17,015
-11% -$368K 0.01% 1152
2025
Q2 		$3.31M Buy
153,774
+42,511
+38% +$733K 0.01% 1087
2025
Q1 		$1.61M Buy
111,263
+85,367
+330% +$1.34M ﹤0.01% 1321
2024
Q4 		$452K Sell
25,896
-6,665
-20% -$103K ﹤0.01% 1856
2024
Q3 		$360K Buy
32,561
+18,296
+128% +$192K ﹤0.01% 1998
2024
Q2 		$153K Buy
14,265
+429
+3% +$4.56K ﹤0.01% 2183
2024
Q1 		$157K Sell
13,836
-2,701
-16% -$27.1K ﹤0.01% 2101
2023
Q4 		$170K Sell
16,537
-2,154
-12% -$18.2K ﹤0.01% 2222
2023
Q3 		$140K Buy
18,691
+5,796
+45% +$45.7K ﹤0.01% 2317
2023
Q2 		$109K Sell
12,895
-3,828
-23% -$31.1K ﹤0.01% 2218
2023
Q1 		$143K Buy
16,723
+509
+3% +$4.04K ﹤0.01% 2334
2022
Q4 		$107K Sell
16,214
-7,978
-33% -$53.7K ﹤0.01% 2343
2022
Q3 		$181K Sell
24,192
-7,093
-23% -$50K ﹤0.01% 2424
2022
Q2 		$180K Buy
+31,285
New +$230K ﹤0.01% 2525

Other funds holding MIR

BlackRock
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
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
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
CLG
Cooperman Leon G $3.05B AUM 42.78% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

State of Wisconsin Investment Board's MIR Position: Q1 2026 in Review

State of Wisconsin Investment Board increased its Mirion Technologies (MIR) stake by 7.2% in Q1 2026, buying an estimated $367K and bringing the position to 242,812 shares worth $4.51M. The position accounts for 0.01% of the portfolio, ranked #1032.

State of Wisconsin Investment Board first reported a position in MIR in Q2 2022 and has held it in 16 quarters since. The position peaked at $5.31M in Q4 2025. 361 funds tracked by Wall St. Rank hold MIR as of Q1 2026.

  • State of Wisconsin Investment Board held 242,812 shares of Mirion Technologies worth $4.51M as of Q1 2026.
  • State of Wisconsin Investment Board bought 16,278 Mirion Technologies shares in Q1 2026, an estimated $367K.
  • Mirion Technologies made up 0.01% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #1032 holding.
  • State of Wisconsin Investment Board first reported a position in Mirion Technologies in Q2 2022 and has held it in 16 quarters since.
  • State of Wisconsin Investment Board's Mirion Technologies position peaked at $5.31M in Q4 2025.
  • 361 funds tracked by Wall St. Rank held Mirion Technologies as of Q1 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.