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OBERWEIS ASSET MANAGEMENT INC
CRD 105471File 801-35657
APPROVED
Retail clients
Filing as of Sep 8, 2026
Feed vintage Oct 1, 2026
Regulatory AUM
$5.06B
Top 25% of cohort (national)
Discretionary AUM
$5.06B
Non-discretionary $842K
Clients
92
110 accounts
Employees
31
Top 25% of cohort in IL
Identity & registration
ADV Item 1- Organization form
- Corporation
- Firm type
- Registered
- SEC region
- CHRO
- Registration date
- Jan 4, 1990
- Principal office
- 3333 WARRENVILLE ROAD, SUITE 500, LISLE, IL, 60532
- Phone
- 630-577-2300
- Website
- HTTP://WWW.OBERWEIS.NET
Assets & accounts
ADV Item 5F- Total regulatory AUM
- $5.06B
- Discretionary AUM
- $5.06B
- Non-discretionary AUM
- $842K
- Discretionary accounts
- 109
- Non-discretionary accounts
- 1
- Total accounts
- 110
- AUM per client
- $55.0M
Clients by type
ADV Item 5D| Client type | Clients | AUM |
|---|---|---|
| Other | 12 | $278.3M |
| Investment companies | 6 | $3.24B |
| Charitable organizations | Fewer than 5 | $33.3M |
| High net worth individuals | 36 | $49.9M |
| Pooled investment vehicles | 1 | $48.8M |
| State or municipal government entities | 7 | $1.40B |
| Individuals (other than high net worth individuals) | 30 | $14.7M |
Compensation & activities
ADV Items 5E, 5GCompensation
- Other
- Other (described) — PROVIDE MODEL PORTFOLIO DATA TO CLIENTS
- A percentage of assets under your management
Advisory activities
- Portfolio management for businesses
- Portfolio management for investment companies
- Portfolio management for pooled investment vehicles
- Portfolio management for individuals and/or small businesses
Custody
ADV Item 9- Firm Custody Cash
- No
- Firm Custody Assets
- No
- Firm Custody Clients
- No
- Firm Custody Securities
- No
- Related Person Custody Cash
- No
- Related Person Custody Assets
- No
- Related Person Custody Clients
- No
- Related Person Custody Securities
- No
Disclosure events
ADV Item 11This firm answered no to every Item 11 disclosure question in this filing.
Filed changes
| Date | Field | From | To | Change |
|---|---|---|---|---|
| Aug 17, 2026 | Clients | 108 | 92 | decreased by16 |
| Apr 1, 2026 | Employees | 30 | 31 | increased by1 |
| Apr 1, 2026 | AUM | $3,944,834,354 | $5,061,020,947 | increased by$1,116,186,593 |
| May 1, 2025 vs Oct 1, 2022 | Employees | 31 | 30 | decreased by1 |
| May 1, 2025 vs Oct 1, 2022 | Clients | 117 | 108 | decreased by9 |
| May 1, 2025 vs Oct 1, 2022 | AUM | $3,784,043,147 | $3,944,834,354 | increased by$160,791,207 |
| May 1, 2025 vs Oct 1, 2022 | Accounts | 123 | 110 | decreased by13 |
| Apr 1, 2022 | Employees | 29 | 31 | increased by2 |
| Apr 1, 2022 | Clients | 115 | 117 | increased by2 |
| Apr 1, 2022 | AUM | $3,764,944,185 | $3,784,043,147 | increased by$19,098,962 |
| Apr 1, 2022 | Accounts | 121 | 123 | increased by2 |
| Apr 1, 2021 | Registration | — | APPROVED |
On Form 5500, an adviser usually appears as a plan service provider (Schedule C), not the plan sponsor.
See plans that list “OBERWEIS ASSET” as a service provider on 5500mcp →Matched by name only — Form ADV and Form 5500 share no identifier, and names are searched loosely (“OBERWEIS ASSET” may also match similarly-named firms). Confirm identity against each filing.
Every value above is reproduced from this firm's Form ADV filing. Fields the firm left blank are shown as “Not reported” rather than filled in from other sources.