Oberweis Asset Management’s Silicon Motion SIMO Stock Holding History

Oberweis Asset Management’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 Q1	$31.7M	Buy	282,550 +46,250	+20%	+$5.61M	0.94%	23
2025 Q4	$21.9M	Buy	236,300 +5,700	+2%	+$523K	0.8%	42
2025 Q3	$21.9M	Hold	230,600	–	–	0.84%	37
2025 Q2	$17.3M	Buy	230,600 +47,500	+26%	+$2.7M	0.75%	45
2025 Q1	$9.26M	Buy	183,100 +25,200	+16%	+$1.36M	0.46%	78
2024 Q4	$8.53M	Sell	157,900 -119,400	-43%	-$6.69M	0.4%	97
2024 Q3	$16.8M	Hold	277,300	–	–	0.86%	36
2024 Q2	$22.5M	Buy	277,300 +59,900	+28%	+$4.68M	1.38%	12
2024 Q1	$16.7M	Buy	217,400 +141,000	+185%	+$9.63M	1.21%	11
2023 Q4	$4.68M	Buy	+76,400	New	+$4.37M	0.44%	90

Other funds holding SIMO

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

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

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

HRCM

Hawk Ridge Capital Management Los Angeles, California $2.75B AUM 20.09% 1-Year Est. Return

Lord, Abbett & Co Jersey City, New Jersey $30.6B AUM 57.44% 1-Year Est. Return

Lazard Asset Management New York $60.8B AUM 22.47% 1-Year Est. Return

Robeco Institutional Asset Management Rotterdam, Netherlands $70.2B AUM 29.99% 1-Year Est. Return

WHCM

Wolf Hill Capital Management Greenwich, Connecticut $1.03B AUM 80.44% 1-Year Est. Return

Man Group London, United Kingdom $55.1B AUM 24.23% 1-Year Est. Return

ACM

Analog Century Management New York $2.09B AUM 186.85% 1-Year Est. Return

Oberweis Asset Management's SIMO Position: Q1 2026 in Review

Oberweis Asset Management increased its Silicon Motion (SIMO) stake by 20% in Q1 2026, buying an estimated $5.61M and bringing the position to 282,550 shares worth $31.7M. The position accounts for 0.94% of the portfolio, ranked #23.

Oberweis Asset Management first reported a position in SIMO in Q4 2023 and has held it in 10 quarters since. 273 funds tracked by Wall St. Rank hold SIMO as of Q1 2026.

Oberweis Asset Management held 282,550 shares of Silicon Motion worth $31.7M as of Q1 2026.
Oberweis Asset Management bought 46,250 Silicon Motion shares in Q1 2026, an estimated $5.61M.
Silicon Motion made up 0.94% of Oberweis Asset Management's portfolio in Q1 2026, its #23 holding.
Oberweis Asset Management first reported a position in Silicon Motion in Q4 2023 and has held it in 10 quarters since.
273 funds tracked by Wall St. Rank held Silicon Motion as of Q1 2026.

Based on Oberweis Asset Management's 13F filing for Q1 2026, filed 15 May 2026.