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John Overdeck’s Mirion Technologies MIR Stock Holding History

John Overdeck’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 		$354K Buy
+19,771
New +$367K ﹤0.01% 4412
2025
Q4 		– Sell
-298,500
Closed -$6.94M – 4287
2025
Q3 		$6.94M Buy
298,500
+269,850
+942% +$5.83M 0.01% 1201
2025
Q2 		$617K Buy
+28,650
New +$494K ﹤0.01% 2491

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

John Overdeck's MIR Position: Q2 2026 in Review

John Overdeck opened a new position in Mirion Technologies (MIR) in Q2 2026: 19,771 shares worth $354K. The stake represents ﹤0.01% of the portfolio and ranks #4412 among its holdings. This is a return to the name: John Overdeck previously reported a position in MIR as recently as Q3 2025.

John Overdeck first reported a position in MIR in Q2 2025 and has held it in 3 quarters since. The position peaked at $6.94M in Q3 2025. 349 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

  • John Overdeck held 19,771 shares of Mirion Technologies worth $354K as of Q2 2026.
  • Mirion Technologies was a new John Overdeck position in Q2 2026.
  • Mirion Technologies made up ﹤0.01% of John Overdeck's portfolio in Q2 2026, its #4412 holding.
  • John Overdeck first reported a position in Mirion Technologies in Q2 2025 and has held it in 3 quarters since.
  • John Overdeck's Mirion Technologies position peaked at $6.94M in Q3 2025.
  • 349 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.