California State Teachers Retirement System (CalSTRS)
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California State Teachers Retirement System (CalSTRS)’s Mirion Technologies MIR Stock Holding History

California State Teachers Retirement System (CalSTRS)’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 		$4.8M Sell
267,489
-6,607
-2% -$123K ﹤0.01% 1113
2026
Q1 		$5.1M Buy
274,096
+49,751
+22% +$1.12M 0.01% 1003
2025
Q4 		$5.25M Buy
224,345
+26,376
+13% +$658K 0.01% 902
2025
Q3 		$4.6M Sell
197,969
-5,433
-3% -$117K ﹤0.01% 975
2025
Q2 		$4.38M Buy
203,402
+25,999
+15% +$448K ﹤0.01% 965
2025
Q1 		$2.57M Sell
177,403
-2,844
-2% -$44.7K ﹤0.01% 1204
2024
Q4 		$3.15M Sell
180,247
-1,994
-1% -$30.9K ﹤0.01% 1134
2024
Q3 		$2.02M Buy
182,241
+9,804
+6% +$103K ﹤0.01% 1405
2024
Q2 		$1.85M Sell
172,437
-4,559
-3% -$48.5K ﹤0.01% 1417
2024
Q1 		$2.01M Sell
176,996
-11,218
-6% -$112K ﹤0.01% 1406
2023
Q4 		$1.93M Sell
188,214
-10,073
-5% -$85K ﹤0.01% 1458
2023
Q3 		$1.48M Sell
198,287
-11,918
-6% -$93.9K ﹤0.01% 1568
2023
Q2 		$1.78M Buy
210,205
+45,002
+27% +$365K ﹤0.01% 1564
2023
Q1 		$1.41M Sell
165,203
-2,488
-1% -$19.7K ﹤0.01% 1692
2022
Q4 		$1.11M Buy
167,691
+1,966
+1% +$13.2K ﹤0.01% 1834
2022
Q3 		$1.24M Sell
165,725
-3,319
-2% -$23.4K ﹤0.01% 1749
2022
Q2 		$974K Buy
+169,044
New +$1.24M ﹤0.01% 1981

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

California State Teachers Retirement System (CalSTRS)'s MIR Position: Q2 2026 in Review

California State Teachers Retirement System (CalSTRS) reduced its Mirion Technologies (MIR) stake by 2.4% in Q2 2026, selling an estimated $123K and leaving 267,489 shares worth $4.8M. The position accounts for ﹤0.01% of the portfolio, ranked #1113.

California State Teachers Retirement System (CalSTRS) first reported a position in MIR in Q2 2022 and has held it in 17 quarters since. The position peaked at $5.25M in Q4 2025. 351 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

  • California State Teachers Retirement System (CalSTRS) held 267,489 shares of Mirion Technologies worth $4.8M as of Q2 2026.
  • California State Teachers Retirement System (CalSTRS) sold 6,607 Mirion Technologies shares in Q2 2026, an estimated $123K.
  • Mirion Technologies made up ﹤0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q2 2026, its #1113 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in Mirion Technologies in Q2 2022 and has held it in 17 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s Mirion Technologies position peaked at $5.25M in Q4 2025.
  • 351 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on California State Teachers Retirement System (CalSTRS)'s 13F filing for Q2 2026, filed 24 Aug 2026.