OBERWEIS ASSET MANAGEMENT INC/
CIK 0000937886 · LISLE, IL · Quarter end: 2026-06-30 · Filed on: 2026-08-14 · Open the SEC source ↗
Portfolio Value (AUM)Total value of the fund's US stock portfolio reported to the SEC.
$4.84B
2026 Q2
Positions
176
Top-10 ConcentrationHow much of the portfolio sits in the 10 largest holdings. High = concentrated bets.
26.6%
Est. Net Flow (Q)
—
2026 Q2
Top Holdings
CRDO
Credo Technology Group
5.7%
AAOI
Applied Optoelectronics Inc.
5.5%
DOCN
DigitalOcean Holdings, Inc.
3.0%
SIMO
Silicon Motion Techn ADR
2.2%
UCTT
Ultra Clean Holdings
1.9%
SN
SharkNinja, Inc.
1.9%
SITM
SiTime Corporation
1.8%
BTSG
BrightSpring Health Services
1.7%
New / Increased
No prior quarter data
Reduced / Exited
No prior quarter data
Read the 2026-Q2 quarterly report · 13F Filing Calendar
13F data shows quarter-end positions, is delayed by up to 45 days and covers only long positions in US-listed securities; short positions, most derivatives and non-US assets are not reported.