Ameriprise
MIR icon

Ameriprise’s Mirion Technologies MIR Stock Holding History

Ameriprise’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 		$24M Sell
1,289,690
-1,046,620
-45% -$23.6M 0.01% 1288
2025
Q4 		$54.7M Buy
2,336,310
+619,118
+36% +$15.4M 0.01% 824
2025
Q3 		$39.9M Buy
1,717,192
+1,456,987
+560% +$31.5M 0.01% 1020
2025
Q2 		$5.6M Buy
260,205
+148,596
+133% +$2.56M ﹤0.01% 2274
2025
Q1 		$1.62M Buy
111,609
+18,287
+20% +$287K ﹤0.01% 3004
2024
Q4 		$1.63M Buy
+93,322
New +$1.45M ﹤0.01% 3031
2021
Q3 		– Sell
-11,161
Closed -$116K – 3911
2021
Q2 		$116K Buy
+11,161
New +$115K ﹤0.01% 3806

Other funds holding MIR

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
CLG
Cooperman Leon G $3.05B AUM 42.78% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Ameriprise's MIR Position: Q1 2026 in Review

Ameriprise reduced its Mirion Technologies (MIR) stake by 45% in Q1 2026, selling an estimated $23.6M and leaving 1,289,690 shares worth $24M. The position accounts for 0.01% of the portfolio, ranked #1288.

Ameriprise first reported a position in MIR in Q2 2021 and has held it in 7 quarters since. The position peaked at $54.7M in Q4 2025. 361 funds tracked by Wall St. Rank hold MIR as of Q1 2026.

  • Ameriprise held 1,289,690 shares of Mirion Technologies worth $24M as of Q1 2026.
  • Ameriprise sold 1,046,620 Mirion Technologies shares in Q1 2026, an estimated $23.6M.
  • Mirion Technologies made up 0.01% of Ameriprise's portfolio in Q1 2026, its #1288 holding.
  • Ameriprise first reported a position in Mirion Technologies in Q2 2021 and has held it in 7 quarters since.
  • Ameriprise's Mirion Technologies position peaked at $54.7M in Q4 2025.
  • 361 funds tracked by Wall St. Rank held Mirion Technologies as of Q1 2026.

Based on Ameriprise's 13F filing for Q1 2026, filed 15 May 2026.