JY
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Jeff Yass’s Mirion Technologies MIR Stock Holding History

Jeff Yass’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
Q2 		$4.14M Buy
231,100
+187,700
+432% +$3.48M ﹤0.01% 4983
2026
Q1 		$807K Sell
43,400
-12,600
-23% -$284K ﹤0.01% 8452
2025
Q4 		$1.31M Sell
56,000
-213,200
-79% -$5.32M ﹤0.01% 6563
2025
Q3 		$6.26M Sell
269,200
-188,900
-41% -$4.08M ﹤0.01% 3732
2025
Q2 		$9.86M Buy
+458,100
New +$7.9M ﹤0.01% 2850
2025
Q1 		– Sell
-34,000
Closed -$593K – 13076
2024
Q4 		$593K Sell
34,000
-8,200
-19% -$127K ﹤0.01% 8254
2024
Q3 		$467K Buy
+42,200
New +$444K ﹤0.01% 8621
2024
Q2 		– Sell
-19,500
Closed -$222K – 12786
2024
Q1 		$222K Sell
19,500
-22,400
-53% -$224K ﹤0.01% 10390
2023
Q4 		$429K Buy
41,900
+29,600
+241% +$250K ﹤0.01% 9037
2023
Q3 		$91.9K Buy
+12,300
New +$96.9K ﹤0.01% 10991
2022
Q4 		– Sell
-14,400
Closed -$108K – 13182
2022
Q3 		$108K Sell
14,400
-3,300
-19% -$23.2K ﹤0.01% 11628
2022
Q2 		$102K Buy
17,700
+500
+3% +$3.68K ﹤0.01% 11460
2022
Q1 		$139K Sell
17,200
-28,200
-62% -$243K ﹤0.01% 11624
2021
Q4 		$475K Sell
45,400
-803,300
-95% -$8.62M ﹤0.01% 9349
2021
Q3 		$8.67M Sell
848,700
-77,800
-8% -$785K ﹤0.01% 3077
2021
Q2 		$9.64M Buy
926,500
+213,600
+30% +$2.2M ﹤0.01% 2973
2021
Q1 		$7.44M Buy
+712,900
New +$8.37M ﹤0.01% 3255

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
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return
CLG
Cooperman Leon G $3.55B AUM 41.85% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
CAM
Congress Asset Management Boston, Massachusetts $16.3B AUM 42.69% 1-Year Est. Return

Jeff Yass's MIR Position: Q2 2026 in Review

Jeff Yass reduced its Mirion Technologies (MIR) stake by 84% in Q2 2026, selling an estimated $2.5M and leaving 26,559 shares worth $476K. The position accounts for ﹤0.01% of the portfolio, ranked #10029.

Jeff Yass first reported a position in MIR in Q4 2020 and has held it in 21 quarters since. The position peaked at $32.6M in Q1 2021. 349 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

  • Jeff Yass held 26,559 shares of Mirion Technologies worth $476K as of Q2 2026.
  • Jeff Yass sold 134,791 Mirion Technologies shares in Q2 2026, an estimated $2.5M.
  • Mirion Technologies made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #10029 holding.
  • Jeff Yass first reported a position in Mirion Technologies in Q4 2020 and has held it in 21 quarters since.
  • Jeff Yass's Mirion Technologies position peaked at $32.6M in Q1 2021.
  • 349 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.