OBERWEIS ASSET MANAGEMENT INC
CRD #105471 SEC #801-35657 LISLE, IL 630-577-2300
SEC Registered Private Funds
Total AUM
$3.9B
Discretionary
$3.9B
Employees
30
Clients
--
Accounts
110
Firm Details
- Organization Type
- Corporation
- State of Formation
- Illinois
- Fiscal Year End
- DECEMBER
- Registration Date
- --
- Latest Filing
- Dec 17, 2025
- Branch Offices
- 0
- LEI
- 549300PDCRBXSQU4DO76
Advisory Services
No services reported
Compensation Methods
No compensation methods reported
Ownership
Direct Owners & Executive Officers (Schedule A)
| Name | Type | Title / Status | Ownership | Control |
|---|---|---|---|---|
| HANNEMANN, ERIC, VICARY | I | CHIEF FINANCIAL OFFICER, TREASURER | NA | |
| HANNEMANN, ERIC, VICARY | I | CHIEF FINANCIAL OFFICER, TREASURER | NA | |
| HANNEMANN, ERIC, VICARY | I | CHIEF FINANCIAL OFFICER, TREASURER | NA | |
| HANNEMANN, ERIC, VICARY | I | CHIEF FINANCIAL OFFICER, TREASURER | NA | |
| HANNEMANN, ERIC, VICARY | I | CHIEF FINANCIAL OFFICER, TREASURER | NA | |
| HANNEMANN, ERIC, VICARY | I | CHIEF FINANCIAL OFFICER, TREASURER | NA | |
| HANNEMANN, ERIC, VICARY | I | CHIEF FINANCIAL OFFICER, TREASURER | NA | |
| HANNEMANN, ERIC, VICARY | I | CHIEF FINANCIAL OFFICER, TREASURER | NA | |
| HANNEMANN, ERIC, VICARY | I | CHIEF FINANCIAL OFFICER, TREASURER | NA | |
| HANNEMANN, ERIC, VICARY | I | CHIEF FINANCIAL OFFICER, TREASURER | NA | |
| HANNEMANN, ERIC, VICARY | I | CHIEF FINANCIAL OFFICER, TREASURER | NA | |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | DIRECTOR, CFO, EXEC. V.P. AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | DIRECTOR, CFO, EXEC. V.P., CCO AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | DIRECTOR, CFO, EXEC. V.P. AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | CHIEF COMPLIANCE OFFICER, DIRECTOR, CFO, EXEC. V.P., AND SECRETARY | NA | Control |
| JOYCE, PATRICK, BRIAN | I | DIRECTOR, EXEC. V.P. | NA | Control |
| JOYCE, PATRICK, BRIAN | I | DIRECTOR, EXEC. V.P. | NA | Control |
| JOYCE, THOMAS, PATRICK | I | CHIEF COMPLIANCE OFFICER, SECRETARY | NA | |
| JOYCE, THOMAS, PATRICK | I | CHIEF COMPLIANCE OFFICER, SECRETARY | NA | |
| JOYCE, THOMAS, PATRICK | I | CHIEF COMPLIANCE OFFICER, SECRETARY | NA | |
| JOYCE, THOMAS, PATRICK | I | CHIEF COMPLIANCE OFFICER, SECRETARY | NA | |
| JOYCE, THOMAS, PATRICK | I | CHIEF COMPLIANCE OFFICER, SECRETARY | NA | |
| JOYCE, THOMAS, PATRICK | I | CHIEF COMPLIANCE OFFICER, SECRETARY | NA | |
| JOYCE, THOMAS, PATRICK | I | CHIEF COMPLIANCE OFFICER, SECRETARY | NA | |
| JOYCE, THOMAS, PATRICK | I | CHIEF COMPLIANCE OFFICER, SECRETARY | NA | |
| JOYCE, THOMAS, PATRICK | I | CHIEF COMPLIANCE OFFICER, SECRETARY | NA | |
| JOYCE, THOMAS, PATRICK | I | CHIEF COMPLIANCE OFFICER, SECRETARY | NA | |
| JOYCE, THOMAS, PATRICK | I | CHIEF COMPLIANCE OFFICER, SECRETARY | NA | |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | D | Control |
| OBERWEIS, ELAINE, MARIE | I | DIRECTOR | C | |
| OBERWEIS, JAMES, DONALD | I | DIRECTOR AND CHAIRMAN | C | Control |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | C | Control |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | C | Control |
| OBERWEIS, JAMES, DONALD | I | DIRECTOR AND CHAIRMAN | C | Control |
| OBERWEIS, JAMES, DONALD | I | DIRECTOR AND CHAIRMAN | C | Control |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | C | Control |
| OBERWEIS, JAMES, DONALD | I | DIRECTOR AND CHAIRMAN | C | Control |
| OBERWEIS, JAMES, DONALD | I | DIRECTOR AND PRESIDENT | C | Control |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | C | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | C | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | C | Control |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | C | Control |
| OBERWEIS, JAMES, WALTER | I | PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | PRESIDENT AND SHAREHOLDER | C | Control |
| OBERWEIS, JAMES, WALTER | I | PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | PRESIDENT AND SHAREHOLDER | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, WALTER | I | CHAIRMAN, PRESIDENT, SHAREHOLDER AND DIRECTOR | C | Control |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | Control |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, DONALD | I | SHAREHOLDER | B | |
| OBERWEIS, JAMES, WALTER | I | SENIOR VICE PRESIDENT, SHAREHOLDER | B | Control |
| JOYCE, PATRICK, BRIAN | I | DIRECTOR, CFO, EXEC. V.P. AND SECRETARY | A | Control |
| OBERWEIS, JOSEPH, STEVEN | I | SHAREHOLDER | A | |
| OBERWEIS, JULIE, KAY | I | SHAREHOLDER | A | |
| OBERWEIS, JULIE, KAY | I | SHAREHOLDER | A | |
| OBERWEIS, JULIE, KAY | I | SHAREHOLDER | A | |
| OBERWEIS, JULIE, KAY | I | SHAREHOLDER | A | |
| OBERWEIS, JULIE, KAY | I | SHAREHOLDER | A | |
| OBERWEIS, JULIE, KAY | I | SHAREHOLDER | A | |
| OBERWEIS, JULIE, KAY | I | SHAREHOLDER | A | |
| OBERWEIS, JULIE, KAY | I | SHAREHOLDER | A | |
| OBERWEIS, TRICIA, ELAINE | I | SHAREHOLDER | A | |
| ROBERTS, JENNIFER, LYNN | I | SHAREHOLDER | A |
Registrations
Federal
IA
Dec 17, 2025 REGISTERED
Notice Filings (22)
AZ CA CO CT DE FL GA IL IN LA MA MI MO NE NJ NV NY OH PA TX VA WI
Address
3333 WARRENVILLE ROADSUITE 500
LISLE, IL 60532
United States
Phone: 630-577-2300