OBSIX — Oberweis Small-Cap Opportunities Fund
Data updated: 2026-05-29
OBSIX — Oberweis Small-Cap Opportunities Fund data: holdings, portfolio allocation, expenses, performance, cashflows, risk and SEC filings. United States Mid Cap Growth Equity · $2.01B AUM · 1.00% expense ratio · 33.8% 1-yr return. From SEC regulatory filings.
OBSIX Fund Overview
OBSIX — Oberweis Small-Cap Opportunities Fund is a US mutual fund managed by Oberweis Funds, categorised as United States Mid Cap Growth Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Oberweis Funds
- Category: United States Mid Cap Growth Equity
- Assets under management: $2.01B
- 1-year return: 33.8%
- Ticker: OBSIX
- SEC CIK: 0000803020
- SEC series ID: S000010232
- Share class ID: C000186090
OBSIX Holdings
Top 10 holdings of Oberweis Small-Cap Opportunities Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Lumentum Holdings Inc | 8.01% |
| Applied Optoelectronics Inc | 4.51% |
| Credo Technology Group Holding | 4.01% |
| DigitalOcean Holdings Inc | 3.29% |
| Nova Ltd | 2.64% |
| SharkNinja Inc | 2.64% |
| Dana Inc | 2.39% |
| BrightSpring Health Services I | 2.18% |
| Rambus Inc | 1.87% |
| SiTime Corp | 1.82% |
OBSIX Portfolio Allocation
Asset-class allocation of Oberweis Small-Cap Opportunities Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 98.6% |
OBSIX Performance
Total returns for OBSIX (as of 2026-08-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 3.8% |
| 1 year | 33.8% |
| 3 years (annualised) | 13.1% |
| 5 years (annualised) | 12.1% |
OBSIX Risk Information
Risk metrics for OBSIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 12.8%
OBSIX Costs and Fees
OBSIX costs about $100 per $10,000 invested per year in fund expenses.
- Net expense ratio: 1.00%
- Gross expense ratio: 1.01%
- Portfolio turnover: 58%
- Brokerage commissions: 7.13 bps of average net assets (SEC N-CEN)
OBSIX Cashflows
Over the 12 months to 2026-03, Oberweis Small-Cap Opportunities Fund had net inflows of $192.13M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-03 | $69.99M |
| 2026-02 | $8.58M |
| 2026-01 | $38.74M |
| 2025-12 | $21.79M |
| 2025-11 | $48.07M |
| 2025-10 | $29.17M |
OBSIX Debt Constituents
No individual debt constituents are reported in Oberweis Small-Cap Opportunities Fund's latest SEC N-PORT filing.
OBSIX Prospectus and SEC Filings
Official Oberweis Small-Cap Opportunities Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other United States Mid Cap Growth Equity funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.