Wellington Management Group
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Wellington Management Group’s Mirion Technologies MIR Stock Holding History

Wellington Management 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 		$19.7M Buy
1,098,987
+261,175
+31% +$4.84M ﹤0.01% 1065
2026
Q1 		$15.6M Buy
837,812
+589,037
+237% +$13.3M ﹤0.01% 1112
2025
Q4 		$5.83M Buy
+248,775
New +$6.2M ﹤0.01% 1376

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

Wellington Management Group's MIR Position: Q2 2026 in Review

Wellington Management Group increased its Mirion Technologies (MIR) stake by 31% in Q2 2026, buying an estimated $4.84M and bringing the position to 1,098,987 shares worth $19.7M. The position accounts for ﹤0.01% of the portfolio, ranked #1065.

Wellington Management Group first reported a position in MIR in Q4 2025 and has held it in 3 quarters since. 351 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

  • Wellington Management Group held 1,098,987 shares of Mirion Technologies worth $19.7M as of Q2 2026.
  • Wellington Management Group bought 261,175 Mirion Technologies shares in Q2 2026, an estimated $4.84M.
  • Mirion Technologies made up ﹤0.01% of Wellington Management Group's portfolio in Q2 2026, its #1065 holding.
  • Wellington Management Group first reported a position in Mirion Technologies in Q4 2025 and has held it in 3 quarters since.
  • 351 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on Wellington Management Group's 13F filing for Q2 2026, filed 14 Aug 2026.