TG
MIR icon

TCW Group’s Mirion Technologies MIR Stock Holding History

TCW Group’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 		$40.4M Buy
2,255,645
+17,219
+0.8% +$319K 0.27% 92
2026
Q1 		$41.6M Sell
2,238,426
-214,153
-9% -$4.83M 0.31% 80
2025
Q4 		$57.4M Buy
+2,452,579
New +$61.2M 0.41% 66
2025
Q3 		– Sell
-731,465
Closed -$15.7M – 313
2025
Q2 		$15.7M Buy
+731,465
New +$12.6M 0.12% 115

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 $3.37T 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

TCW Group's MIR Position: Q2 2026 in Review

TCW Group increased its Mirion Technologies (MIR) stake by 0.77% in Q2 2026, buying an estimated $319K and bringing the position to 2,255,645 shares worth $40.4M. The position accounts for 0.27% of the portfolio, ranked #92.

TCW Group first reported a position in MIR in Q2 2025 and has held it in 4 quarters since. The position peaked at $57.4M in Q4 2025. 351 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

  • TCW Group held 2,255,645 shares of Mirion Technologies worth $40.4M as of Q2 2026.
  • TCW Group bought 17,219 Mirion Technologies shares in Q2 2026, an estimated $319K.
  • Mirion Technologies made up 0.27% of TCW Group's portfolio in Q2 2026, its #92 holding.
  • TCW Group first reported a position in Mirion Technologies in Q2 2025 and has held it in 4 quarters since.
  • TCW Group's Mirion Technologies position peaked at $57.4M in Q4 2025.
  • 351 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on TCW Group's 13F filing for Q2 2026, filed 3 Aug 2026.