Oberweis Asset Management Inc/ reported 169 positions worth $4.82B for the quarter ended Jun 30, 2026, up 44.1% on the prior quarter. It opened 22 new positions, added to 112, trimmed 26 and exited 24. Its largest holding is Credo Technology Group Holding Ltd at 5.7% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| MXL Maxlinear, Inc | +319.5K | – | $40.91M | 0.849% |
| NOVT Novanta Inc | +244.3K | – | $39.63M | 0.822% |
| BLLN BillionToOne, Inc. | +299.0K | – | $35.88M | 0.745% |
| ESI Element Solutions Inc | +740.1K | – | $35.34M | 0.733% |
| OUST Ouster, Inc. | +545.8K | – | $34.12M | 0.708% |
| HNGE Hinge Health, Inc. | +389.7K | +83.7% | $32.35M | 1.47% |
| CGNX Cognex Corp | +427.8K | – | $30.98M | 0.643% |
| GVA Granite Construction Inc | +193.1K | – | $30.52M | 0.633% |
| PDFS Pdf Solutions Inc | +426.4K | – | $30.18M | 0.626% |
| MYRG Myr Group Inc. | +54.2K | – | $27.12M | 0.563% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| LITE Lumentum Holdings Inc. | -194.0K | -72.9% | $166.50M | 1.29% |
| AAOI Applied Optoelectronics, Inc. | -558.8K | -23.8% | $82.80M | 5.51% |
| FLS Flowserve Corp | -434.7K | -100.0% | $31.95M | Exited |
| PRIM Primoris Services Corp | -166.1K | -100.0% | $23.76M | Exited |
| G Genpact LTD | -606.8K | -100.0% | $22.60M | Exited |
| ATEC Alphatec Holdings, Inc. | -1.91M | -100.0% | $20.76M | Exited |
| EYE National Vision Holdings, Inc. | -797.8K | -100.0% | $20.66M | Exited |
| PEGA Pegasystems Inc | -455.3K | -100.0% | $19.38M | Exited |
| AEO American Eagle Outfitters Inc | -1.04M | -100.0% | $17.45M | Exited |
| WGS GeneDx Holdings Corp. | -261.4K | -100.0% | $16.79M | Exited |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| MXL Maxlinear, Inc | +319.5K | $40.91M | 0.849% |
| NOVT Novanta Inc | +244.3K | $39.63M | 0.822% |
| BLLN BillionToOne, Inc. | +299.0K | $35.88M | 0.745% |
| ESI Element Solutions Inc | +740.1K | $35.34M | 0.733% |
| OUST Ouster, Inc. | +545.8K | $34.12M | 0.708% |
| CGNX Cognex Corp | +427.8K | $30.98M | 0.643% |
| GVA Granite Construction Inc | +193.1K | $30.52M | 0.633% |
| PDFS Pdf Solutions Inc | +426.4K | $30.18M | 0.626% |
| MYRG Myr Group Inc. | +54.2K | $27.12M | 0.563% |
| KGS Kodiak Gas Services, Inc. | +355.9K | $26.74M | 0.555% |
| Holding | Shares Sold | Trade Value | Prior Weight |
|---|---|---|---|
| FLS Flowserve Corp | -434.7K | $31.95M | 0.955% |
| PRIM Primoris Services Corp | -166.1K | $23.76M | 0.71% |
| G Genpact LTD | -606.8K | $22.60M | 0.676% |
| ATEC Alphatec Holdings, Inc. | -1.91M | $20.76M | 0.621% |
| EYE National Vision Holdings, Inc. | -797.8K | $20.66M | 0.618% |
| PEGA Pegasystems Inc | -455.3K | $19.38M | 0.579% |
| AEO American Eagle Outfitters Inc | -1.04M | $17.45M | 0.522% |
| WGS GeneDx Holdings Corp. | -261.4K | $16.79M | 0.502% |
| SHAK Shake Shack Inc. | -187.6K | $16.59M | 0.496% |
| MIR Mirion Technologies, Inc. | -744.3K | $13.84M | 0.414% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | CRDO Credo Technology Group Holding Ltd | Technology | 1.01M | $275.60M | 5.72% | -8,540 | -0.8% | Reduced | 0.55% |
| 2 | AAOI Applied Optoelectronics, Inc. | Technology | 1.79M | $265.37M | 5.51% | -558.8K | -23.8% | Reduced | 2.12% |
| 3 | DOCN DigitalOcean Holdings, Inc. | Technology | 930.0K | $146.04M | 3.03% | +2,500 | +0.3% | Added | 0.89% |
| 4 | SIMO Silicon Motion Technology CORP | Technology | 316.4K | $105.45M | 2.19% | +33.8K | +12.0% | Added | 0.94% |
| 5 | UCTT Ultra Clean Holdings, Inc. | Technology | 647.3K | $92.30M | 1.92% | +6,800 | +1.1% | Added | 1.43% |
| 6 | SN SharkNinja, Inc. | Consumer Discretionary | 593.5K | $90.37M | 1.88% | -6,470 | -1.1% | Reduced | 0.42% |
| 7 | SITM SITIME Corp | Technology | 119.5K | $89.10M | 1.85% | +220 | +0.2% | Added | 0.45% |
| 8 | BTSG BrightSpring Health Services, Inc. | Healthcare | 1.19M | $82.66M | 1.72% | +26.3K | +2.3% | Added | 0.58% |
| 9 | HNGE Hinge Health, Inc. | Healthcare | 855.5K | $71.00M | 1.47% | +389.7K | +83.7% | Added | 1.37% |
| 10 | RMBS Rambus Inc | Technology | 527.0K | $69.96M | 1.45% | +700 | +0.1% | Added | 0.49% |
| 11 | MTSI MACOM Technology Solutions Holdings, Inc. | Technology | 179.4K | $68.22M | 1.42% | -36.5K | -16.9% | Reduced | 0.24% |
| 12 | LITE Lumentum Holdings Inc. | Technology | 72.2K | $61.94M | 1.29% | -194.0K | -72.9% | Reduced | 0.08% |
| 13 | LSCC Lattice Semiconductor Corp | Technology | 391.8K | $59.93M | 1.24% | +17.4K | +4.6% | Added | 0.29% |
| 14 | NVMI Nova Ltd. | Technology | 108.7K | $59.00M | 1.22% | -29.3K | -21.2% | Reduced | 0.36% |
| 15 | CRS Carpenter Technology Corp | Basic Materials | 93.3K | $57.53M | 1.19% | -1,160 | -1.2% | Reduced | 0.19% |
Tip. Select a row to see that position’s full history at Oberweis Asset Management.
As of its Q2 2026 13F filing, Oberweis Asset Management Inc/’s five largest positions were Credo Technology Group Holding Ltd (CRDO) at 5.7%, Applied Optoelectronics, Inc. (AAOI) at 5.5%, DigitalOcean Holdings, Inc. (DOCN) at 3.0%, Silicon Motion Technology CORP (SIMO) at 2.2%, Ultra Clean Holdings, Inc. (UCTT) at 1.9% of the reported portfolio.
Oberweis Asset Management Inc/ reported a 13F portfolio worth $4.82B across 169 positions for Q2 2026. That is up 44.1% from the previous quarter.
Its largest purchases by value were Maxlinear, Inc ($40.91M), Novanta Inc ($39.63M), BillionToOne, Inc. ($35.88M). It opened 22 new positions.
Its largest sales by value were Lumentum Holdings Inc. ($166.50M), Applied Optoelectronics, Inc. ($82.80M), Flowserve Corp ($31.95M). It exited 24 positions entirely.
From the Form 13F-HR reports Oberweis Asset Management Inc/ files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.