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Rossby Financial’s Mirion Technologies MIR Stock Holding History

Rossby Financial’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 		$1.79K Buy
96
+87
+967% +$1.96K ﹤0.01% 1844
2025
Q4 		$211 Buy
+9
New +$224 ﹤0.01% 1745

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

Rossby Financial's MIR Position: Q1 2026 in Review

Rossby Financial increased its Mirion Technologies (MIR) stake by 967% in Q1 2026, buying an estimated $1.96K and bringing the position to 96 shares worth $1.79K. The position accounts for ﹤0.01% of the portfolio, ranked #1844.

Rossby Financial first reported a position in MIR in Q4 2025 and has held it in 2 quarters since. 360 funds tracked by Wall St. Rank hold MIR as of Q1 2026.

  • Rossby Financial held 96 shares of Mirion Technologies worth $1.79K as of Q1 2026.
  • Rossby Financial bought 87 Mirion Technologies shares in Q1 2026, an estimated $1.96K.
  • Mirion Technologies made up ﹤0.01% of Rossby Financial's portfolio in Q1 2026, its #1844 holding.
  • Rossby Financial first reported a position in Mirion Technologies in Q4 2025 and has held it in 2 quarters since.
  • 360 funds tracked by Wall St. Rank held Mirion Technologies as of Q1 2026.

Based on Rossby Financial's 13F filing for Q1 2026, filed 11 May 2026.