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Summit Partners Public Asset Management’s Mirion Technologies MIR Stock Holding History

Summit Partners Public 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
Q1 		– Sell
-500,000
Closed -$11.7M – 181
2025
Q4 		$11.7M Hold
500,000
– – 0.24% 85
2025
Q3 		$11.6M Sell
500,000
-546,000
-52% -$11.8M 0.24% 98
2025
Q2 		$22.5M Buy
1,046,000
+150,000
+17% +$2.59M 0.57% 53
2025
Q1 		$13M Buy
+896,000
New +$14.1M 0.33% 91

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
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
CLG
Cooperman Leon G $3.55B AUM 41.85% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

Summit Partners Public Asset Management's MIR Position: Q1 2026 in Review

Summit Partners Public Asset Management sold out of Mirion Technologies (MIR) in Q1 2026, closing a stake of 500,000 shares — an estimated $11.7M sold.

Summit Partners Public Asset Management first reported a position in MIR in Q1 2025 and held it in 4 quarters. The position peaked at $22.5M in Q2 2025. 362 funds tracked by Wall St. Rank hold MIR as of Q1 2026.

  • Summit Partners Public Asset Management reported no remaining Mirion Technologies position as of Q1 2026 after selling out during the quarter.
  • Summit Partners Public Asset Management sold 500,000 Mirion Technologies shares in Q1 2026, an estimated $11.7M.
  • Summit Partners Public Asset Management first reported a position in Mirion Technologies in Q1 2025 and held it in 4 quarters.
  • Summit Partners Public Asset Management's Mirion Technologies position peaked at $22.5M in Q2 2025.
  • 362 funds tracked by Wall St. Rank held Mirion Technologies as of Q1 2026.

Based on Summit Partners Public Asset Management's 13F filing for Q1 2026, filed 15 May 2026.