Ardsley Advisory Partners’s Mirion Technologies MIR Stock Holding History

Ardsley Advisory Partners’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	$5.83M	Hold	325,000	–	–	0.61%	56
2026 Q1	$6.04M	Hold	325,000	–	–	0.77%	41
2025 Q4	$7.61M	Sell	325,000 -3,220	-1%	-$80.3K	0.84%	39
2025 Q3	$7.63M	Sell	328,220 -135,000	-29%	-$2.92M	0.94%	37
2025 Q2	$9.97M	Buy	463,220 +288,220	+165%	+$4.97M	1.31%	21
2025 Q1	$2.54M	Buy	175,000 +50,000	+40%	+$786K	0.49%	75
2024 Q4	$2.18M	Hold	125,000	–	–	0.35%	88
2024 Q3	$1.38M	Buy	125,000 +25,000	+25%	+$263K	0.23%	86
2024 Q2	$1.07M	Sell	100,000 -25,000	-20%	-$266K	0.16%	96
2024 Q1	$1.42M	Sell	125,000 -25,000	-17%	-$250K	0.2%	81
2023 Q4	$1.54M	Buy	150,000 +50,000	+50%	+$422K	0.24%	83
2023 Q3	$747K	Hold	100,000	–	–	0.17%	92
2023 Q2	$845K	Buy	+100,000	New	+$811K	0.14%	90
2021 Q4	–	Sell	-27,500	Closed	-$279K	–	142
2021 Q3	$279K	Buy	+27,500	New	+$277K	0.04%	115
2021 Q2	–	Sell	-750,000	Closed	-$7.82M	–	155
2021 Q1	$7.82M	Buy	+750,000	New	+$8.81M	0.95%	30

Other funds holding MIR

CAM

Congress Asset Management Boston, Massachusetts $16.3B AUM 42.69% 1-Year Est. Return

Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return

PCM

Peregrine Capital Management Minneapolis, Minnesota $3.08B AUM 29.51% 1-Year Est. Return

ZCI

Zevenbergen Capital Investments Edmonds, Washington $4.38B AUM 56.68% 1-Year Est. Return

Tema ETFs New York $3.09B AUM 72.72% 1-Year Est. Return

RFA

Covea Finance Paris, France $3.17B AUM 35.01% 1-Year Est. Return

Handelsbanken Fonder Stockholm, Sweden $35.1B AUM 47.76% 1-Year Est. Return

YCM

Yousif Capital Management Bloomfield Hills, Michigan $8.94B AUM 42.6% 1-Year Est. Return

COPPSERS

Commonwealth of Pennsylvania Public School Employees Retirement System Harrisburg, Pennsylvania $20.6B AUM 37.37% 1-Year Est. Return

Ardsley Advisory Partners's MIR Position: Q2 2026 in Review

Ardsley Advisory Partners held its Mirion Technologies (MIR) position steady in Q2 2026 at 325,000 shares worth $5.83M. The position accounts for 0.61% of the portfolio, ranked #56.

Ardsley Advisory Partners first reported a position in MIR in Q1 2021 and has held it in 15 quarters since. The position peaked at $9.97M in Q2 2025. 29 funds tracked by Wall St. Rank hold MIR as of Q2 2026.

Ardsley Advisory Partners held 325,000 shares of Mirion Technologies worth $5.83M as of Q2 2026.
Ardsley Advisory Partners left its Mirion Technologies share count unchanged in Q2 2026.
Mirion Technologies made up 0.61% of Ardsley Advisory Partners's portfolio in Q2 2026, its #56 holding.
Ardsley Advisory Partners first reported a position in Mirion Technologies in Q1 2021 and has held it in 15 quarters since.
Ardsley Advisory Partners's Mirion Technologies position peaked at $9.97M in Q2 2025.
29 funds tracked by Wall St. Rank held Mirion Technologies as of Q2 2026.

Based on Ardsley Advisory Partners's 13F filing for Q2 2026, filed 13 Jul 2026.