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OBERWEIS ASSET MANAGEMENT INC/
Period ended Jun 30, 2026 · Latest filing Aug 14, 2026
These quarterly holdings are delayed and may not include all assets or short positions.
Values are from the reporting date, not current prices or purchase costs.
The same security may appear in multiple rows.
Source: SEC
Reported portfolio value
Quarter-end reported holdings; not current value or investment performance.
View reported values
- Jun 30, 2026: $4,839,542,355
More quarters will appear as history becomes available.
Top holdings
Top 10 at Jun 30, 2026. Matching entries are combined; security classes and options remain separate. Shares exclude principal amounts; option shares reflect the reported underlying amount.
View top holdings values
- Credo Technology Group · COM · G25457105 · shares: $275,601,745
- Applied Optoelectronics Inc. · COM · 03823U102 · shares: $265,373,376
- DigitalOcean Holdings, Inc. · COM · 25402D102 · shares: $146,038,685
- Silicon Motion Techn ADR · COM · 82706C108 · shares: $105,448,946
- Ultra Clean Holdings · COM · 90385V107 · shares: $92,295,085
- SharkNinja, Inc. · COM · G8068L108 · shares: $90,372,245
- SiTime Corporation · COM · 82982T106 · shares: $89,095,166
- BrightSpring Health Services · COM · 10950A106 · shares: $82,661,427
- Hinge Health, Inc. · COM · 433313103 · shares: $71,004,508
- Rambus, Inc · COM · 750917106 · shares: $69,956,104
Reported holdings
176 reported entries| Issuer | Class | CUSIP | Type | Shares / principal | Reported value (USD) |
|---|---|---|---|---|---|
| Argan, Inc | COM | 04010E109 | — | 21,120 shares | $16,865,376 |
| Vistance Networks, Inc. | COM | 20337X109 | — | 1,298,612 shares | $16,596,261 |
| Trimas Corp. | COM | 896215209 | — | 362,000 shares | $16,300,860 |
| Zeta Global Holdings Corp. | COM | 98956A105 | — | 819,770 shares | $16,133,074 |
| Seacoast Bkg Corp. | COM | 811707801 | — | 477,866 shares | $15,889,045 |
| Interface, Inc. | COM | 458665304 | — | 443,200 shares | $15,884,288 |
| Pediatrix Medical Group, Inc. | COM | 58502B106 | — | 623,087 shares | $15,782,794 |
| ProPetro Holding Corp. | COM | 74347M108 | — | 1,097,100 shares | $15,732,414 |
| Fastly, Inc. | COM | 31188V100 | — | 852,322 shares | $15,648,632 |
| Matador Resources Company | COM | 576485205 | — | 314,200 shares | $15,640,876 |
| OneSpaWorld Holdings Limited | COM | P73684113 | — | 552,990 shares | $15,616,438 |
| LeMaitre Vascular, Inc. | COM | 525558201 | — | 158,502 shares | $15,209,894 |
| Calix, Inc. | COM | 13100M509 | — | 402,230 shares | $15,011,224 |
| Arlo Technologies, Inc. | COM | 04206A101 | — | 1,093,300 shares | $14,737,684 |
| Innodata, Inc. | COM | 457642205 | — | 189,200 shares | $14,299,736 |
| Magnite, Inc. | COM | 55955D100 | — | 735,000 shares | $13,950,300 |
| Nicolet Bankshares, Inc. | COM | 65406E102 | — | 83,200 shares | $13,760,448 |
| M/I Homes, Inc. | COM | 55305B101 | — | 83,400 shares | $13,409,886 |
| Grand Canyon Education, Inc. | COM | 38526M106 | — | 92,530 shares | $13,241,968 |
| Imax Corp. | COM | 45245E109 | — | 326,539 shares | $13,015,845 |
| EPlus, Inc. | COM | 294268107 | — | 150,998 shares | $12,567,564 |
| Knowles Corp. | COM | 49926D109 | — | 293,110 shares | $12,158,203 |
| Interdigital, Inc. | COM | 45867G101 | — | 42,935 shares | $12,156,187 |
| Boot Barn Hldgs, Inc. | COM | 099406100 | — | 73,200 shares | $12,024,564 |
| Lindblad Expeditions Holdings, | COM | 535219109 | — | 420,721 shares | $11,881,161 |
| Magnolia Oil & Gas Corp. | COM | 559663109 | — | 456,466 shares | $11,676,400 |
| V2X, Inc. | COM | 92242T101 | — | 147,370 shares | $10,987,907 |
| Evolv Technologies Holdings | COM | 30049H102 | — | 1,823,949 shares | $10,578,904 |
| CorMedix, Inc. | COM | 21900C308 | — | 1,323,915 shares | $10,392,733 |
| The Gorman-Rupp Co. | COM | 383082104 | — | 108,600 shares | $9,962,964 |
| FB Financial Corp. | COM | 30257X104 | — | 177,100 shares | $9,802,485 |
| Phibro Animal Health Corp | COM | 71742Q106 | — | 311,100 shares | $9,768,540 |
| NPK International, Inc. | COM | 651718504 | — | 587,550 shares | $9,347,921 |
| American Public Education, Inc | COM | 02913V103 | — | 172,400 shares | $9,257,880 |
| Catalyst Pharmaceuticals, Inc. | COM | 14888U101 | — | 293,670 shares | $9,230,048 |
| Addus Homecare Corp. | COM | 006739106 | — | 89,916 shares | $9,033,861 |
| Babcock & Wilcox Enterprises, | COM | 05614L209 | — | 627,900 shares | $8,853,390 |
| Radware, Ltd. | COM | M81873107 | — | 286,200 shares | $8,832,132 |
| Amprius Technologies, Inc. | COM | 03214Q108 | — | 636,200 shares | $8,817,732 |
| Precision Drilling Corp. | COM | 74022D407 | — | 110,800 shares | $8,493,928 |
| KForce, Inc. | COM | 493732101 | — | 176,200 shares | $8,267,304 |
| 1st Source Corp. | COM | 336901103 | — | 93,800 shares | $7,652,204 |
| PC Connection, Inc. | COM | 69318J100 | — | 104,300 shares | $7,612,857 |
| Red Violet, Inc. | COM | 75704L104 | — | 119,000 shares | $7,582,680 |
| Bioventus, Inc. | COM | 09075A108 | — | 709,714 shares | $6,699,700 |
| Expro Limited | COM | G3314M109 | — | 452,000 shares | $6,676,040 |
| The Chefs' Warehouse, Inc. | COM | 163086101 | — | 57,544 shares | $5,529,978 |
| The Vita Coco Co., Inc. | COM | 92846Q107 | — | 83,608 shares | $5,529,833 |
| Rocky Brands, Inc. | COM | 774515100 | — | 117,700 shares | $4,853,948 |
| SPDR S&P 500 ETF Trust | ETF | 78462F103 | — | 2,378 shares | $1,775,787 |
| ACM Research, Inc. Class A | COM | 00108J109 | — | 13,000 shares | $1,649,570 |
| JP Morgan Chase & Company Inc. | COM | 46625H100 | — | 3,206 shares | $1,049,350 |
| Apple, Inc. | COM | 037833100 | — | 3,532 shares | $1,021,902 |
| Microsoft Corp. | COM | 594918104 | — | 2,665 shares | $994,098 |
| Micron Technology | COM | 595112103 | — | 700 shares | $808,003 |
| Alphabet, Inc. Cl A | COM | 02079k305 | — | 1,900 shares | $679,074 |
| Freshworks, Inc. | COM | 358054104 | — | 57,750 shares | $584,430 |
| Johnson & Johnson | COM | 478160104 | — | 2,298 shares | $583,522 |
| Alphabet, Inc. Cl C | COM | 02079k107 | — | 1,620 shares | $572,395 |
| The Travelers Co., Inc. | COM | 89417E109 | — | 1,583 shares | $522,568 |
| Amgen, Inc. | COM | 031162100 | — | 1,036 shares | $375,334 |
| Bank of New York Mellon Corp. | COM | 064058100 | — | 2,511 shares | $363,124 |
| Caterpillar, Inc. | COM | 149123101 | — | 328 shares | $349,627 |
| Mastercard, Inc. | COM | 57636Q104 | — | 662 shares | $339,969 |
| H World Group Ltd. | COM | 44332N106 | — | 8,000 shares | $333,760 |
| Intel Corporation | COM | 458140100 | — | 2,314 shares | $323,143 |
| Resmed Inc. | COM | 761152107 | — | 1,450 shares | $282,576 |
| Newmont Mining | COM | 651639106 | — | 2,876 shares | $268,629 |
| Wells Fargo Co New Perp Pfd | PFD | 949746804 | — | 225 shares | $260,325 |
| Wal Mart Stores Inc. | COM | 931142103 | — | 2,139 shares | $242,224 |
| Aflac Inc. | COM | 001055102 | — | 2,000 shares | $234,500 |
| McDonald's Corporation | COM | 580135101 | — | 856 shares | $231,448 |
| Freeport Mcmoran Copper & Gold | COM | 35671D857 | — | 3,593 shares | $225,945 |
| Merck & Co. | COM | 58933Y105 | — | 1,730 shares | $222,305 |
| Eli Lilly & Company | COM | 532457108 | — | 183 shares | $219,496 |
| Xenacare Hldgs, Inc. | COM | 98401A106 | — | 140,000 shares | $0 |