Largest positions
| Issuer | Class | Value | Share |
|---|---|---|---|
| Credo Technology GroupCOM | COM | $276M | 5.7% |
| Applied Optoelectronics Inc..COM | COM | $265M | 5.5% |
| Digitalocean Holdings, Inc..COM | COM | $146M | 3.0% |
| Silicon Motion Techn ADRCOM | COM | $105M | 2.2% |
| Ultra Clean HoldingsCOM | COM | $92.3M | 1.9% |
| Sharkninja, Inc..COM | COM | $90.4M | 1.9% |
| Sitime CorporationCOM | COM | $89.1M | 1.8% |
| Brightspring Health ServicesCOM | COM | $82.7M | 1.7% |
| Hinge Health, Inc..COM | COM | $71M | 1.5% |
| Rambus, Inc.COM | COM | $70M | 1.4% |
| Macom Technology SolutionsCOM | COM | $68.2M | 1.4% |
| Lumentum Hldgs, Inc..COM | COM | $61.9M | 1.3% |
| Lattice Semiconductor CorporatCOM | COM | $59.9M | 1.2% |
| Nova Ltd.COM | COM | $59M | 1.2% |
| Carpenter Technology Corp..COM | COM | $57.5M | 1.2% |
| Frontdoor, Inc..COM | COM | $55.8M | 1.2% |
| Everus Construction GroupCOM | COM | $54.5M | 1.1% |
| Veracyte, Inc..COM | COM | $51.5M | 1.1% |
| Powell Industries Inc..COM | COM | $51.4M | 1.1% |
| Life Time Holdings, Inc..COM | COM | $48.6M | 1.0% |
| Rush Street Interactive, Inc..COM | COM | $48.4M | 1.0% |
| Mercury Systems, Inc..COM | COM | $48M | 1.0% |
| Dutch Bros., Inc..COM | COM | $47.1M | 1.0% |
| Clean Harbors, Inc..COM | COM | $45.9M | 0.9% |
| Solaris Energy InfrastructurCOM | COM | $45.4M | 0.9% |
| Diodes, Inc..COM | COM | $45.3M | 0.9% |
| Arcosa, Inc..COM | COM | $42.9M | 0.9% |
| Blue Bird CorporationCOM | COM | $41.8M | 0.9% |
| Camtek, Ltd.COM | COM | $41.3M | 0.9% |
| Livanova PLCCOM | COM | $41.1M | 0.8% |
| American SuperconductorCOM | COM | $41M | 0.8% |
| Maxlinear, Inc.. Class ACOM | COM | $40.9M | 0.8% |
| Globus Medical, Inc..-aCOM | COM | $40.5M | 0.8% |
| Novanta, Inc..COM | COM | $39.6M | 0.8% |
| Skywest Inc.COM | COM | $38.1M | 0.8% |
| Viavi Solutions, Inc..COM | COM | $37.9M | 0.8% |
| Moog Inc.. - ACOM | COM | $36.8M | 0.8% |
| Littelfuse, Inc..COM | COM | $36.3M | 0.8% |
| Arcutis Biotherapeutics, Inc..COM | COM | $36M | 0.7% |
| Firstcash Holdings, Inc.COM | COM | $35.9M | 0.7% |
| Billiontoone, Inc..COM | COM | $35.9M | 0.7% |
| Dana Inc..COM | COM | $35.9M | 0.7% |
| Element Solutions, Inc..COM | COM | $35.3M | 0.7% |
| Aar Corp..COM | COM | $35.2M | 0.7% |
| Remitly Global, Inc..COM | COM | $35.2M | 0.7% |
| Icu Medical, Inc..COM | COM | $34.8M | 0.7% |
| Federal Signal Corp..COM | COM | $34.6M | 0.7% |
| Ouster, Inc..COM | COM | $34.1M | 0.7% |
| Levi Strauss & Co.COM | COM | $33.7M | 0.7% |
| Merit Medical System Inc.COM | COM | $32.8M | 0.7% |
- Class
- COM
- Share
- 5.7%
- Class
- COM
- Share
- 5.5%
- Class
- COM
- Share
- 3.0%
- Class
- COM
- Share
- 2.2%
- Class
- COM
- Share
- 1.9%
- Class
- COM
- Share
- 1.9%
- Class
- COM
- Share
- 1.8%
- Class
- COM
- Share
- 1.7%
- Class
- COM
- Share
- 1.5%
- Class
- COM
- Share
- 1.4%
- Class
- COM
- Share
- 1.4%
- Class
- COM
- Share
- 1.3%
- Class
- COM
- Share
- 1.2%
- Class
- COM
- Share
- 1.2%
- Class
- COM
- Share
- 1.2%
- Class
- COM
- Share
- 1.2%
- Class
- COM
- Share
- 1.1%
- Class
- COM
- Share
- 1.1%
- Class
- COM
- Share
- 1.1%
- Class
- COM
- Share
- 1.0%
- Class
- COM
- Share
- 1.0%
- Class
- COM
- Share
- 1.0%
- Class
- COM
- Share
- 1.0%
- Class
- COM
- Share
- 0.9%
- Class
- COM
- Share
- 0.9%
- Class
- COM
- Share
- 0.9%
- Class
- COM
- Share
- 0.9%
- Class
- COM
- Share
- 0.9%
- Class
- COM
- Share
- 0.9%
- Class
- COM
- Share
- 0.8%
- Class
- COM
- Share
- 0.8%
- Class
- COM
- Share
- 0.8%
- Class
- COM
- Share
- 0.8%
- Class
- COM
- Share
- 0.8%
- Class
- COM
- Share
- 0.8%
- Class
- COM
- Share
- 0.8%
- Class
- COM
- Share
- 0.8%
- Class
- COM
- Share
- 0.8%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.7%
The share class is shown on a wider screen.
The 50 largest of 176 positions by value, with holdings of the same security combined. The 176 largest are in this firm's machine-readable record. Share counts and quarter-on-quarter changes for each position are on EDGAR. View the full information table on EDGAR
This filing
- Form
- 13F-HR
- CIK
- 937886
- File number
- 028-04688
- Options
- 0 call, 0 put
- In the 25 largest
- 43.2%
- Prior quarter
- $3.39B at 31 March 2026
- Positions opened
- 23
- Positions closed
- 27
Common questions
What are Oberweis Asset Management’s 13F holdings worth?
$4.84 billion across 176 positions for the quarter ended 30 June 2026.
What is Oberweis Asset Management’s largest 13F holding?
Credo Technology Group (COM) was the largest position at $276 million, or 5.7% of reported 13F value, as of 30 June 2026.
How concentrated is Oberweis Asset Management’s 13F portfolio?
The ten largest positions accounted for 26.6% of reported value and the twenty-five largest for 43.2%, across 176 positions as of 30 June 2026.
Does Form 13F show everything Oberweis Asset Management manages?
No. Form 13F covers only long positions in exchange-traded securities over which the manager has investment discretion, valued at quarter end. It excludes cash, most bonds, private funds, and any assets the firm does not have discretion over, so it is neither the firm's total assets nor any individual client's portfolio.
How often does Oberweis Asset Management file its 13F?
Every quarter. Managers file within 45 days of each quarter's end, so the figures are a snapshot that changes between filings. This page shows the quarter ended 30 June 2026.
Answered from this filing and the prior quarter's.