Ardsley Advisory Partners’s Silicon Motion SIMO Stock Holding History

Ardsley Advisory Partners’s Portfolio SIMO Stock Details SIMO Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-133,000	Closed	-$12.6M	–	186
2025 Q3	$12.6M	Buy	+133,000	New	+$10.6M	1.56%	18
2024 Q1	–	Sell	-7,500	Closed	-$460K	–	177
2023 Q4	$460K	Buy	+7,500	New	+$429K	0.07%	117
2022 Q1	–	Sell	-8,500	Closed	-$808K	–	154
2021 Q4	$808K	Buy	+8,500	New	+$641K	0.15%	76

Other funds holding SIMO

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

Reinhart Partners Mequon, Wisconsin $4.38B AUM 55.55% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return

Pertento Partners London, United Kingdom $1.86B AUM 53.86% 1-Year Est. Return

Lord, Abbett & Co Jersey City, New Jersey $34.9B AUM 72.7% 1-Year Est. Return

HRCM

Hawk Ridge Capital Management Los Angeles, California $3.12B AUM 53.42% 1-Year Est. Return

Lazard Asset Management New York $66.1B AUM 33.53% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return

Ardsley Advisory Partners's SIMO Position: Q4 2025 in Review

Ardsley Advisory Partners sold out of Silicon Motion (SIMO) in Q4 2025, closing a stake of 133,000 shares — an estimated $12.6M sold.

Ardsley Advisory Partners first reported a position in SIMO in Q4 2021 and held it in 3 quarters. The position peaked at $12.6M in Q3 2025. 240 funds tracked by Wall St. Rank hold SIMO as of Q4 2025.

Ardsley Advisory Partners reported no remaining Silicon Motion position as of Q4 2025 after selling out during the quarter.
Ardsley Advisory Partners sold 133,000 Silicon Motion shares in Q4 2025, an estimated $12.6M.
Ardsley Advisory Partners first reported a position in Silicon Motion in Q4 2021 and held it in 3 quarters.
Ardsley Advisory Partners's Silicon Motion position peaked at $12.6M in Q3 2025.
240 funds tracked by Wall St. Rank held Silicon Motion as of Q4 2025.

Based on Ardsley Advisory Partners's 13F filing for Q4 2025, filed 17 Feb 2026.