Calamos Advisors
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Calamos Advisors’s Mirion Technologies MIR Stock Holding History

Calamos Advisors’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
-31,700
Closed -$742K – 1245
2025
Q4 		$742K Sell
31,700
-12,700
-29% -$317K ﹤0.01% 723
2025
Q3 		$1.03M Hold
44,400
– – ﹤0.01% 700
2025
Q2 		$956K Buy
+44,400
New +$765K ﹤0.01% 697

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 $3.37T AUM 44.26% 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

Calamos Advisors's MIR Position: Q1 2026 in Review

Calamos Advisors sold out of Mirion Technologies (MIR) in Q1 2026, closing a stake of 31,700 shares — an estimated $742K sold.

Calamos Advisors first reported a position in MIR in Q2 2025 and held it in 3 quarters. The position peaked at $1.03M in Q3 2025. 362 funds tracked by Wall St. Rank hold MIR as of Q1 2026.

  • Calamos Advisors reported no remaining Mirion Technologies position as of Q1 2026 after selling out during the quarter.
  • Calamos Advisors sold 31,700 Mirion Technologies shares in Q1 2026, an estimated $742K.
  • Calamos Advisors first reported a position in Mirion Technologies in Q2 2025 and held it in 3 quarters.
  • Calamos Advisors's Mirion Technologies position peaked at $1.03M in Q3 2025.
  • 362 funds tracked by Wall St. Rank held Mirion Technologies as of Q1 2026.

Based on Calamos Advisors's 13F filing for Q1 2026, filed 4 May 2026.