Holdings
Oberweis Micro-Cap Fund
As of Jun 30, 2026, Oberweis Micro-Cap Fund reported 66 positions worth US$1.31B. Largest: Ultra Clean Holdings, Inc., Applied Optoelectronics, Inc. and Powell Industries, Inc. What it bought and sold, with each filing.
| Company | Shares | Value as reported | Change | As of |
|---|---|---|---|---|
| Ultra Clean Holdings, Inc. | 497K | US$88.6M | −116K | Jun 30, 2026 |
| Applied Optoelectronics, Inc. | 529K | US$78.3M | −545K | Jun 30, 2026 |
| Powell Industries, Inc. | 173K | US$49.6M | +140K | Jun 30, 2026 |
| Diodes Incorporated | 399K | US$43.7M | +184K | Jun 30, 2026 |
| Rush Street Interactive, Inc. | 1.45M | US$43.1M | +193K | Jun 30, 2026 |
| Blue Bird Corporation | 504K | US$40.4M | +131K | Jun 30, 2026 |
| Maxlinear, Inc | 309K | US$39.5M | new | Jun 30, 2026 |
| American Superconductor Corporation | 925K | US$38.4M | +140K | Jun 30, 2026 |
| Ouster, Inc. | 528K | US$33M | new | Jun 30, 2026 |
| Ceco Environmental Corp. | 346K | US$31.4M | +216K | Jun 30, 2026 |