# Oberweis Micro-Cap Fund

Oberweis Micro-Cap Fund is a registered fund series of OBERWEIS FUNDS (series S000010231). Net assets $1.1B as of 2026-03-31.

## Profile

- Series ID: S000010231
- Registrant: OBERWEIS FUNDS
- LEI: 549300306YSEQ2ZTQH15
- Net assets: $1.1B
- Total assets: $1.1B
- As of: 2026-03-31

## Advisers

- [Oberweis Asset Management, Inc. (Advisor)](https://search.stillhousedata.com/firm/105471)

## Top holdings (77 reported)

_Showing 15 of 77 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [Applied Optoelectronics Inc](https://search.stillhousedata.com/security/03823U102) | AAOI | $90.9M | 865.07% |
| [Ultra Clean Holdings Inc](https://search.stillhousedata.com/security/90385V107) | UCTT | $38.1M | 363.12% |
| [Camtek Ltd/Israel](https://search.stillhousedata.com/security/M20791105) | CAMT | $32.4M | 308.33% |
| [Silicon Motion Technology Corp](https://search.stillhousedata.com/security/82706C108) | SIMO | $30.5M | 289.97% |
| [Fastly Inc](https://search.stillhousedata.com/security/31188V100) | FSLY | $29.9M | 284.45% |
| [Tutor Perini Corp](https://search.stillhousedata.com/security/901109108) | TPC | $29.2M | 277.68% |
| [Rush Street Interactive Inc](https://search.stillhousedata.com/security/782011100) | RSI | $27.3M | 260.37% |
| [American Superconductor Corp](https://search.stillhousedata.com/security/030111207) | AMSC | $26.6M | 253.08% |
| [Primoris Services Corp](https://search.stillhousedata.com/security/74164F103) | PRIM | $22.8M | 217.11% |
| [Blue Bird Corp](https://search.stillhousedata.com/security/095306106) | BLBD | $21.2M | 201.92% |
| [IMAX Corp](https://search.stillhousedata.com/security/45245E109) | IMAX | $21.0M | 200.40% |
| [nLight Inc](https://search.stillhousedata.com/security/65487K100) | LASR | $19.8M | 188.83% |
| [National Vision Holdings Inc](https://search.stillhousedata.com/security/63845R107) | EYE | $19.8M | 188.81% |
| [LivaNova PLC](https://search.stillhousedata.com/security/G5509L101) | LIVN | $19.6M | 186.95% |
| [Powell Industries Inc](https://search.stillhousedata.com/security/739128106) | POWL | $17.7M | 168.99% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-03-31 | $1.1B |
| 2025-12-31 | $870.8M |
| 2025-09-30 | $868.5M |
| 2025-06-30 | $720.8M |
| 2025-03-31 | $593.9M |
| 2024-12-31 | $657.8M |
| 2024-09-30 | $591.9M |
| 2024-06-30 | $511.2M |

## More

- [Registrant: OBERWEIS FUNDS](https://search.stillhousedata.com/registrant/803020)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000010231.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.