Congress Asset Management
MIR icon

Congress Asset Management’s Mirion Technologies MIR Stock Holding History

Congress 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
Q3 		$85.2M Sell
6,034,528
-650,906
-10% -$10.3M 0.55% 63
2026
Q2 		$120M Buy
6,685,434
+5,571,373
+500% +$103M 0.74% 45
2026
Q1 		$20.7M Buy
+1,114,061
New +$25.1M 0.15% 143

Other funds holding MIR

Geode Capital Management
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Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return
Swedbank
Swedbank Stockholm, Sweden $118B AUM 40.52% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $30.8B AUM 33.92% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $608B AUM 32.77% 1-Year Est. Return
TimesSquare Capital Management
TimesSquare Capital Management New York $6.12B AUM 30.01% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $195B AUM 21.17% 1-Year Est. Return
Conestoga Capital Advisors
Conestoga Capital Advisors Wayne, Pennsylvania $3.31B AUM 6.07% 1-Year Est. Return
Deutsche Bank
Deutsche Bank Frankfurt Am Main Ge, Germany $362B AUM 34.89% 1-Year Est. Return
Bastion Asset Management
Bastion Asset Management Montreal, Canada $229M AUM 5.92% 1-Year Est. Return

Congress Asset Management's MIR Position: Q3 2026 in Review

Congress Asset Management reduced its Mirion Technologies (MIR) stake by 9.7% in Q3 2026, selling an estimated $10.3M and leaving 6,034,528 shares worth $85.2M. The position accounts for 0.55% of the portfolio, ranked #63.

Congress Asset Management first reported a position in MIR in Q1 2026 and has held it in 3 quarters since. The position peaked at $120M in Q2 2026. 161 funds tracked by Wall St. Rank hold MIR as of Q3 2026.

  • Congress Asset Management held 6,034,528 shares of Mirion Technologies worth $85.2M as of Q3 2026.
  • Congress Asset Management sold 650,906 Mirion Technologies shares in Q3 2026, an estimated $10.3M.
  • Mirion Technologies made up 0.55% of Congress Asset Management's portfolio in Q3 2026, its #63 holding.
  • Congress Asset Management first reported a position in Mirion Technologies in Q1 2026 and has held it in 3 quarters since.
  • Congress Asset Management's Mirion Technologies position peaked at $120M in Q2 2026.
  • 161 funds tracked by Wall St. Rank held Mirion Technologies as of Q3 2026.

Based on Congress Asset Management's 13F filing for Q3 2026, filed 6 Oct 2026.