Atom Investors’s Silicon Motion SIMO Stock Holding History

Atom Investors’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
2026 Q2	$511K	Buy	+1,533	New	+$355K	0.05%	562
2025 Q2	–	Sell	-29,903	Closed	-$1.51M	–	769
2025 Q1	$1.51M	Buy	29,903 +23,292	+352%	+$1.26M	0.19%	155
2024 Q4	$357K	Buy	+6,611	New	+$370K	0.04%	349
2021 Q4	–	Sell	-18,980	Closed	-$1.31M	–	387
2021 Q3	$1.31M	Buy	18,980 +4,898	+35%	+$346K	0.11%	102
2021 Q2	$903K	Buy	14,082 +1,496	+12%	+$98.3K	0.11%	132
2021 Q1	$747K	Buy	+12,586	New	+$716K	0.12%	129

Other funds holding SIMO

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

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

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

Alkeon Capital Management New York $74.1B AUM 71.18% 1-Year Est. Return

HRCM

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

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

PCH

Polar Capital Holdings London, United Kingdom $42.4B AUM 181.11% 1-Year Est. Return

DCM

Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return

Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

WHCM

Wolf Hill Capital Management Greenwich, Connecticut $1.2B AUM 137.35% 1-Year Est. Return

Atom Investors's SIMO Position: Q2 2026 in Review

Atom Investors opened a new position in Silicon Motion (SIMO) in Q2 2026: 1,533 shares worth $511K. The stake represents 0.05% of the portfolio and ranks #562 among its holdings. This is a return to the name: Atom Investors previously reported a position in SIMO as recently as Q1 2025.

Atom Investors first reported a position in SIMO in Q1 2021 and has held it in 6 quarters since. The position peaked at $1.51M in Q1 2025. 385 funds tracked by Wall St. Rank hold SIMO as of Q2 2026.

Atom Investors held 1,533 shares of Silicon Motion worth $511K as of Q2 2026.
Silicon Motion was a new Atom Investors position in Q2 2026.
Silicon Motion made up 0.05% of Atom Investors's portfolio in Q2 2026, its #562 holding.
Atom Investors first reported a position in Silicon Motion in Q1 2021 and has held it in 6 quarters since.
Atom Investors's Silicon Motion position peaked at $1.51M in Q1 2025.
385 funds tracked by Wall St. Rank held Silicon Motion as of Q2 2026.

Based on Atom Investors's 13F filing for Q2 2026, filed 14 Aug 2026.