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 Q2	$105M	Buy	316,350 +33,800	+12%	+$7.83M	2.18%	4
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 $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

Oberweis Asset Management's SIMO Position: Q2 2026 in Review

Oberweis Asset Management increased its Silicon Motion (SIMO) stake by 12% in Q2 2026, buying an estimated $7.83M and bringing the position to 316,350 shares worth $105M. The position accounts for 2.18% of the portfolio, ranked #4.

Oberweis Asset Management first reported a position in SIMO in Q4 2023 and has held it in 11 quarters since. 385 funds tracked by Wall St. Rank hold SIMO as of Q2 2026.

Oberweis Asset Management held 316,350 shares of Silicon Motion worth $105M as of Q2 2026.
Oberweis Asset Management bought 33,800 Silicon Motion shares in Q2 2026, an estimated $7.83M.
Silicon Motion made up 2.18% of Oberweis Asset Management's portfolio in Q2 2026, its #4 holding.
Oberweis Asset Management first reported a position in Silicon Motion in Q4 2023 and has held it in 11 quarters since.
385 funds tracked by Wall St. Rank held Silicon Motion as of Q2 2026.

Based on Oberweis Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.