MAM
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Montanaro Asset Management’s Mirion Technologies MIR Stock Holding History

Montanaro Asset Management’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 		$7.51M Buy
418,646
+113,346
+37% +$2.1M 2.37% 20
2026
Q1 		$5.68M Buy
305,300
+49,900
+20% +$1.13M 1.7% 28
2025
Q4 		$5.98M Buy
255,400
+83,800
+49% +$2.09M 1.67% 29
2025
Q3 		$3.99M Buy
+171,600
New +$3.71M 1% 32

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

Montanaro Asset Management's MIR Position: Q2 2026 in Review

Montanaro Asset Management increased its Mirion Technologies (MIR) stake by 37% in Q2 2026, buying an estimated $2.1M and bringing the position to 418,646 shares worth $7.51M. The position accounts for 2.37% of the portfolio, ranked #20.

Montanaro Asset Management first reported a position in MIR in Q3 2025 and has held it in 4 quarters since. 351 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

  • Montanaro Asset Management held 418,646 shares of Mirion Technologies worth $7.51M as of Q2 2026.
  • Montanaro Asset Management bought 113,346 Mirion Technologies shares in Q2 2026, an estimated $2.1M.
  • Mirion Technologies made up 2.37% of Montanaro Asset Management's portfolio in Q2 2026, its #20 holding.
  • Montanaro Asset Management first reported a position in Mirion Technologies in Q3 2025 and has held it in 4 quarters since.
  • 351 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on Montanaro Asset Management's 13F filing for Q2 2026, filed 12 Aug 2026.