Kingdon Capital Management’s Mirion Technologies MIR Stock Holding History

Kingdon Capital 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
2025 Q4	–	Sell	-375,000	Closed	-$8.72M	–	89
2025 Q3	$8.72M	Sell	375,000 -50,000	-12%	-$1.08M	1.08%	42
2025 Q2	$9.15M	Sell	425,000 -25,000	-6%	-$431K	1.23%	38
2025 Q1	$6.53M	Buy	450,000 +50,000	+13%	+$786K	0.69%	42
2024 Q4	$6.98M	Buy	+400,000	New	+$6.2M	0.99%	48
2022 Q2	–	Sell	-700,000	Closed	-$5.65M	–	87
2022 Q1	$5.65M	Sell	700,000 -538,500	-43%	-$4.64M	0.59%	43
2021 Q4	$13M	Buy	1,238,500 +580,500	+88%	+$6.23M	1.49%	22
2021 Q3	$6.72M	Buy	+658,000	New	+$6.64M	0.82%	39

Other funds holding MIR

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

CLG

Cooperman Leon G $3.55B AUM 41.85% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Janus Henderson Group London $209B AUM 37.72% 1-Year Est. Return

Kingdon Capital Management's MIR Position: Q4 2025 in Review

Kingdon Capital Management sold out of Mirion Technologies (MIR) in Q4 2025, closing a stake of 375,000 shares — an estimated $8.72M sold.

Kingdon Capital Management first reported a position in MIR in Q3 2021 and held it in 7 quarters. The position peaked at $13M in Q4 2021. 365 funds tracked by Wall St. Rank hold MIR as of Q4 2025.

Kingdon Capital Management reported no remaining Mirion Technologies position as of Q4 2025 after selling out during the quarter.
Kingdon Capital Management sold 375,000 Mirion Technologies shares in Q4 2025, an estimated $8.72M.
Kingdon Capital Management first reported a position in Mirion Technologies in Q3 2021 and held it in 7 quarters.
Kingdon Capital Management's Mirion Technologies position peaked at $13M in Q4 2021.
365 funds tracked by Wall St. Rank held Mirion Technologies as of Q4 2025.

Based on Kingdon Capital Management's 13F filing for Q4 2025, filed 17 Feb 2026.