SEC-Registered Investment Adviser
Oberweis Asset Management INC
Registration facts are from the firm's Form ADV Part 1A as published by the SEC, latest filing dated September 8, 2026. Figures are firm-level: they describe the advisory firm, not any single offering.
Registration
- Status
- Approved
- Registered since
- January 4, 1990
- Principal office
- 3333 Warrenville Road, Suite 500, Lisle, IL 60532
- Organized as
- Corporation, IL
- Fiscal year end
- December
- Website
- HTTP://WWW.OBERWEIS.NET
Scale
- Regulatory AUM
- $5.1B
- Discretionary / non-discretionary
- $5.1B / $841,646
- Attributable to non-US clients
- $340.6M
- Accounts
- 110
- Clients
- 0
- Employees
- 31, 17 in advisory roles
- Private funds advised
- 1
- Private fund gross assets
- $48.8M
- Fund types
- 1 other private funds
- Funds with Form D records
- 1 issuer in AltStreet's ledger, $113.7M reported sold across them
Business, clients and compensation, as filed
- Advisory activities
- portfolio management for individuals and small businesses, portfolio management for investment companies, portfolio management for pooled investment vehicles and portfolio management for businesses and institutional clients
- Compensated by
- a percentage of assets under management and other
- Client types
- individuals (other than high net worth) (30); high net worth individuals (36); banking or thrift institutions (0); investment companies (6); business development companies (0); pooled investment vehicles (1); pension and profit sharing plans (0); charitable organizations; state or municipal government entities (7); other investment advisers (0); insurance companies (0); sovereign wealth funds and foreign official institutions (0); corporations or other businesses (12); other (16)
- Related persons include
- a broker-dealer and another investment adviser
- Affiliates
- 1 broker-dealer, 2 investment advisers
Form ADV Item 11 disclosures
No yes answers on Item 11 as of the latest Form ADV (September 8, 2026). Item 11 covers the firm and its advisory affiliates.
Form D activity of the funds this firm advises, by year
1 issuer in AltStreet's EDGAR ledger are joined to this adviser through Form ADV Schedule D, with Form D filings from October 16, 2020 to September 30, 2026. Reported sold across them: $113.7M.Years are the year of each offering's first notice; sold and investors are the latest figures on each chain. Counts and totals only; the fund roster is in the terminal.
| First notice | Offerings | Reported sold | Investors |
|---|---|---|---|
| 2020 | 1 | $113.7M | 23 |
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Source: SEC Form ADV via IARD (roster of October 6, 2026), matched to the platform by AltStreet analysts. Item 11 answers are as reported on the firm's Form ADV and cover the firm and its advisory affiliates; consult the firm's IAPD record for the Disclosure Reporting Pages. Brochure statements are the firm's own. Nothing on this page is investment advice.