BlackRock
MIR icon

BlackRock’s Mirion Technologies MIR Stock Holding History

BlackRock’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 		$686M Buy
38,262,307
+404,610
+1% +$7.5M 0.01% 983
2026
Q1 		$704M Sell
37,857,697
-342,271
-0.9% -$7.72M 0.01% 884
2025
Q4 		$895M Buy
38,199,968
+1,769,477
+5% +$44.1M 0.02% 742
2025
Q3 		$847M Buy
36,430,491
+19,417,850
+114% +$420M 0.01% 757
2025
Q2 		$366M Buy
17,012,641
+872,717
+5% +$15M 0.01% 1244
2025
Q1 		$234M Buy
16,139,924
+37,863
+0.2% +$595K ﹤0.01% 1501
2024
Q4 		$281M Buy
16,102,061
+129,141
+0.8% +$2M 0.01% 1456
2024
Q3 		$177M Buy
15,972,920
+170,536
+1% +$1.79M ﹤0.01% 1733
2024
Q2 		$170M Buy
15,802,384
+246,889
+2% +$2.62M ﹤0.01% 1712
2024
Q1 		$177M Sell
15,555,495
-391,489
-2% -$3.92M ﹤0.01% 1724
2023
Q4 		$163M Buy
15,946,984
+1,092,376
+7% +$9.22M ﹤0.01% 1780
2023
Q3 		$111M Buy
14,854,608
+990,619
+7% +$7.81M ﹤0.01% 1928
2023
Q2 		$117M Buy
13,863,989
+3,328,271
+32% +$27M ﹤0.01% 1940
2023
Q1 		$90M Buy
10,535,718
+96,685
+0.9% +$767K ﹤0.01% 2078
2022
Q4 		$69M Buy
10,439,033
+548,037
+6% +$3.69M ﹤0.01% 2250
2022
Q3 		$73.9M Buy
9,890,996
+471,849
+5% +$3.32M ﹤0.01% 2159
2022
Q2 		$54.3M Buy
9,419,147
+7,116,896
+309% +$52.4M ﹤0.01% 2428
2022
Q1 		$18.6M Buy
2,302,251
+935,824
+68% +$8.06M ﹤0.01% 3216
2021
Q4 		$14.3M Buy
+1,366,427
New +$14.7M ﹤0.01% 3467

Other funds holding MIR

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 $3.37T AUM 44.26% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return
CLG
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
CAM
Congress Asset Management Boston, Massachusetts $16.3B AUM 42.69% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

BlackRock's MIR Position: Q2 2026 in Review

BlackRock increased its Mirion Technologies (MIR) stake by 1.1% in Q2 2026, buying an estimated $7.5M and bringing the position to 38,262,307 shares worth $686M. The position accounts for 0.01% of the portfolio, ranked #983.

BlackRock first reported a position in MIR in Q4 2021 and has held it in 19 quarters since. The position peaked at $895M in Q4 2025. 351 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

  • BlackRock held 38,262,307 shares of Mirion Technologies worth $686M as of Q2 2026.
  • BlackRock bought 404,610 Mirion Technologies shares in Q2 2026, an estimated $7.5M.
  • Mirion Technologies made up 0.01% of BlackRock's portfolio in Q2 2026, its #983 holding.
  • BlackRock first reported a position in Mirion Technologies in Q4 2021 and has held it in 19 quarters since.
  • BlackRock's Mirion Technologies position peaked at $895M in Q4 2025.
  • 351 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on BlackRock's 13F filing for Q2 2026, filed 7 Aug 2026.