Oberweis Asset Management’s Diodes DIOD Stock Holding History

Oberweis Asset Management’s Portfolio DIOD Stock Details DIOD Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$45.3M	Buy	413,750 +189,450	+84%	+$19.2M	0.94%	26
2026 Q1	$15.3M	Buy	224,300 +72,400	+48%	+$4.57M	0.45%	89
2025 Q4	$7.49M	Sell	151,900 -66,800	-31%	-$3.38M	0.27%	128
2025 Q3	$11.6M	Hold	218,700	–	–	0.45%	86
2025 Q2	$11.6M	Buy	+218,700	New	+$9.62M	0.5%	78
2022 Q3	–	Sell	-6,900	Closed	-$446K	–	172
2022 Q2	$446K	Buy	6,900 +2,000	+41%	+$146K	0.11%	124
2022 Q1	$426K	Buy	4,900 +1,500	+44%	+$137K	0.09%	122
2021 Q4	$373K	Buy	+3,400	New	+$345K	0.07%	120
2014 Q4	–	Sell	-14,800	Closed	-$354K	–	131
2014 Q3	$354K	Sell	14,800 -30,100	-67%	-$796K	0.1%	104
2014 Q2	$1.3M	Sell	44,900 -9,000	-17%	-$249K	0.32%	69
2014 Q1	$1.41M	Buy	53,900 +16,700	+45%	+$401K	0.3%	68
2013 Q4	$876K	Sell	37,200 -3,200	-8%	-$72.2K	0.21%	80
2013 Q3	$990K	Buy	+40,400	New	+$1.05M	0.28%	61

Other funds holding DIOD

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

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

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

William Blair Investment Management Chicago, Illinois $33.3B AUM 44.76% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

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

Oberweis Asset Management increased its Diodes (DIOD) stake by 84% in Q2 2026, buying an estimated $19.2M and bringing the position to 413,750 shares worth $45.3M. The position accounts for 0.94% of the portfolio, ranked #26.

Oberweis Asset Management first reported a position in DIOD in Q3 2013 and has held it in 13 quarters since. 398 funds tracked by Wall St. Rank hold DIOD as of Q2 2026.

Oberweis Asset Management held 413,750 shares of Diodes worth $45.3M as of Q2 2026.
Oberweis Asset Management bought 189,450 Diodes shares in Q2 2026, an estimated $19.2M.
Diodes made up 0.94% of Oberweis Asset Management's portfolio in Q2 2026, its #26 holding.
Oberweis Asset Management first reported a position in Diodes in Q3 2013 and has held it in 13 quarters since.
398 funds tracked by Wall St. Rank held Diodes as of Q2 2026.

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