EdgeMarket › What Oberweis Asset Management Inc/ reported owning
What Oberweis Asset Management Inc/ reported owning
As filed on Form 13F for the quarter ending 2026-03-31, up to 45 days after that date. Long-only US-listed equity — shorts, bonds, cash and non-US listings are not on the form, so this is one leg of the book, not the book.
Reported value
3.4BPositions
180Quarter
2026-03-31Shown below
50largest by value
| holding | value | % of book | shares | price | 1y |
|---|---|---|---|---|---|
| AAOI APPLIED OPTOELECTRONICS, INC. | 198.8M | 5.9% | 2.3M | 124.82 | +469.2% |
| LITE Lumentum Holdings Inc. | 187.1M | 5.5% | 266.2K | 866.71 | +647.9% |
| CRDO Credo Technology Group Holding Ltd | 95.9M | 2.8% | 1.0M | 230.57 | +117.5% |
| DOCN DigitalOcean Holdings, Inc. | 79.6M | 2.3% | 927.5K | 115.64 | +282.8% |
| SN SharkNinja, Inc. | 63.5M | 1.9% | 600.0K | 180.76 | +51.1% |
| NVMI NOVA LTD. | 59.9M | 1.8% | 138.0K | 376.99 | +53.0% |
| DAN DANA Inc | 54.2M | 1.6% | 1.6M | 31.72 | +69.8% |
| BTSG BrightSpring Health Services, Inc. | 49.4M | 1.5% | 1.2M | 58.87 | +149.1% |
| MTSI MACOM Technology Solutions Holdings, Inc. | 47.9M | 1.4% | 215.9K | 266.61 | +120.1% |
| RMBS RAMBUS INC | 45.3M | 1.3% | 526.3K | 91.24 | +30.9% |
| CLH CLEAN HARBORS INC | 41.4M | 1.2% | 144.4K | 315.98 | +29.5% |
| SITM SITIME Corp | 41.2M | 1.2% | 119.3K | 614.83 | +177.5% |
| UCTT Ultra Clean Holdings, Inc. | 39.8M | 1.2% | 640.5K | 76.43 | +242.1% |
| ECG Everus Construction Group, Inc. | 38.6M | 1.1% | 326.5K | 125.96 | +68.4% |
| FTDR Frontdoor, Inc. | 38.0M | 1.1% | 718.0K | 82.59 | +40.3% |
| CRS CARPENTER TECHNOLOGY CORP | 37.2M | 1.1% | 94.4K | 492.38 | +105.1% |
| SKYW SKYWEST INC | 36.0M | 1.1% | 392.5K | 101.09 | -10.9% |
| LSCC LATTICE SEMICONDUCTOR CORP | 34.7M | 1.0% | 374.4K | 117.69 | +91.7% |
| GMED GLOBUS MEDICAL INC | 33.8M | 1.0% | 392.2K | 86.91 | +43.1% |
| CAMT CAMTEK LTD | 33.8M | 1.0% | 222.8K | 146.81 | +78.1% |
| ARQT Arcutis Biotherapeutics, Inc. | 32.2M | 1.0% | 1.4M | 25.08 | +58.8% |
| FLS FLOWSERVE CORP | 32.0M | 0.9% | 434.7K | 79.39 | +52.2% |
| SIMO Silicon Motion Technology CORP | 31.7M | 0.9% | 282.6K | 258.36 | +248.5% |
| LTH Life Time Group Holdings, Inc. | 31.3M | 0.9% | 1.2M | 45.11 | +60.7% |
| RSI Rush Street Interactive, Inc. | 31.2M | 0.9% | 1.4M | 25.80 | +32.3% |
| FCFS FirstCash Holdings, Inc. | 31.1M | 0.9% | 165.7K | 225.28 | +61.9% |
| FSLY Fastly, Inc. | 31.1M | 0.9% | 1.1M | 24.95 | +246.5% |
| TPC TUTOR PERINI CORP | 30.4M | 0.9% | 393.9K | 91.27 | +63.0% |
| BROS Dutch Bros Inc. | 30.3M | 0.9% | 598.5K | 49.87 | -20.8% |
| SEI Solaris Energy Infrastructure, Inc. | 30.1M | 0.9% | 531.9K | 53.28 | +96.2% |
| MMSI MERIT MEDICAL SYSTEMS INC | 29.2M | 0.9% | 424.2K | 90.78 | +3.9% |
| FSS FEDERAL SIGNAL CORP /DE/ | 28.9M | 0.9% | 267.6K | 122.51 | -2.8% |
| AMSC AMERICAN SUPERCONDUCTOR CORP /DE/ | 28.8M | 0.8% | 849.9K | 30.01 | -37.6% |
| MRCY MERCURY SYSTEMS INC | 28.5M | 0.8% | 391.0K | 91.36 | +41.6% |
| ACA Arcosa, Inc. | 28.4M | 0.8% | 267.7K | 144.90 | +51.7% |
| OSIS OSI SYSTEMS INC | 28.3M | 0.8% | 106.6K | 206.73 | -7.5% |
| CNR Core Natural Resources, Inc. | 28.3M | 0.8% | 269.8K | 95.13 | +37.2% |
| WAY Waystar Holding Corp. | 28.1M | 0.8% | 1.2M | 25.01 | -28.7% |
| EHC Encompass Health Corp | 28.0M | 0.8% | 289.5K | 120.31 | -2.6% |
| VCYT VERACYTE, INC. | 27.1M | 0.8% | 839.8K | 42.31 | +43.5% |
| AIR AAR CORP | 26.8M | 0.8% | 245.1K | 134.82 | +87.9% |
| ICUI ICU MEDICAL INC/DE | 26.3M | 0.8% | 203.7K | 182.84 | +48.2% |
| LFUS LITTELFUSE INC /DE | 24.4M | 0.7% | 71.8K | 412.26 | +65.4% |
| PRIM Primoris Services Corp | 23.8M | 0.7% | 166.1K | 77.18 | -30.2% |
| RELY Remitly Global, Inc. | 22.8M | 0.7% | 1.5M | 26.67 | +41.6% |
| G Genpact LTD | 22.6M | 0.7% | 606.8K | 37.14 | -15.7% |
| AIZ ASSURANT, INC. | 22.3M | 0.7% | 102.3K | 284.04 | +31.9% |
| BLBD Blue Bird Corp | 22.1M | 0.7% | 389.2K | 61.89 | +12.1% |
| IMAX IMAX CORP | 21.9M | 0.6% | 577.1K | 52.74 | +104.8% |
| LEVI LEVI STRAUSS & CO | 21.6M | 0.6% | 1.2M | 21.49 | +3.3% |
A position that grew quarter on quarter may simply reflect a higher price: if the stock rose 40% and the manager did nothing, the reported value rose 40%. Reading that as accumulation is reading the price back to yourself. More on that →
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