Oberweis Asset Management Inc./
In its 13F for Q4 2024 (holdings as of December 31, 2024, filed February 14, 2025), Oberweis Asset Management Inc./ reported 196 stock positions worth $2.1 billion. Its top holding was Credo Technology Group Holdi (CRDO) at 3.0% of the portfolio, followed by Adma Biologics (ADMA, 2.7%) and Sharkninja (SN, 2.3%). Compared with Q3 2024, it opened 30 new positions, sold out of 40, added to 115 and reduced 26. The biggest buy was Credo Technology Group Holdi (CRDO, shares +16%) and the biggest sale an exit from Transmedics (TMDX).
- Most Recent 13F
- Q2 2026
- Location
- LISLE, IL
- CIK
- 0000937886
- Portfolio Value
- $2.1B (Q4 2024)
- SEC Filing
- 0001213900-25-013939 ↗ filed Feb 14, 2025
Holdings Value
Holdings 196 stocks · $2.1B
| CRDO Credo Technology Group Holdi | 3.04% | 959,594 | $64.5M | Add +15.8% |
| ADMA Adma Biologics Inc. | 2.70% | 3,342,560 | $57.3M | Add +15.0% |
| SN Sharkninja Inc. | 2.29% | 499,290 | $48.6M | Add +8.0% |
| ZETA Zeta Global Holdings Corp. Class A | 1.56% | 1,840,040 | $33.1M | Add +14.7% |
| SKYW Skywest Inc. | 1.51% | 319,150 | $32.0M | Add +14.9% |
| EHC Encompass Health Corp. | 1.48% | 340,829 | $31.5M | Add +11.2% |
| DOCS Doximity Inc. Class A | 1.44% | 573,100 | $30.6M | Add +23.8% |
| VCYT Veracyte Inc. | 1.40% | 748,720 | $29.6M | Add +4.6% |
| FLS Flowserve Corp. | 1.27% | 468,590 | $27.0M | Add +14.3% |
| FTDR Frontdoor Inc. | 1.20% | 467,500 | $25.6M | Add +13.6% |
| PSN Parsons Corp. | 1.16% | 267,470 | $24.7M | Reduce -0.1% |
| ICUI Icu Medical Inc. | 1.15% | 156,680 | $24.3M | Add +20.1% |
| CLH Clean Harbors Inc. | 1.11% | 102,430 | $23.6M | Reduce -2.8% |
| DORM Dorman Products Inc. | 1.10% | 179,720 | $23.3M | New |
| MTSI Macom Technology Solutions H | 1.10% | 179,070 | $23.3M | Add +17.0% |
| G Genpact Ltd. | 1.06% | 523,600 | $22.5M | Add +18.4% |
| UCTT Ultra Clean Holdings Inc. | 1.04% | 613,300 | $22.0M | Add +39.4% |
| ANF Abercrombie & Fitch Co. Class A | 1.04% | 147,300 | $22.0M | Add +14.6% |
| NVMI Nova Ltd. | 1.03% | 111,000 | $21.9M | Add +77.9% |
| RMBS Rambus Inc. | 1.02% | 409,400 | $21.6M | New |
| ITRI Itron Inc. | 1.02% | 199,110 | $21.6M | Add +6.5% |
| LRN Stride Inc. | 1.02% | 207,300 | $21.5M | Add +80.6% |
| ONTO Onto Innovation Inc. | 1.02% | 129,235 | $21.5M | No change |
| FSS Federal Signal Corp. | 1.00% | 229,830 | $21.2M | Add +21.1% |
| LIVN Livanova PLC | 0.96% | 440,535 | $20.4M | Add +54.7% |
| HIMS Hims & Hers Health Inc. | 0.96% | 843,600 | $20.4M | Reduce -10.6% |
| MMSI Merit Medical Systems Inc. | 0.95% | 208,760 | $20.2M | Add +3.3% |
| WFRD Weatherford International PL | 0.93% | 275,888 | $19.8M | Reduce -18.1% |
| ACA Arcosa Inc. | 0.93% | 203,000 | $19.6M | New |
| PRMB Primo Brands Corp. | 0.92% | 632,400 | $19.5M | Add +44.1% |
| BRBR Bellring Brands Inc. | 0.90% | 253,100 | $19.1M | Add +22.9% |
| PRIM Primoris Services Corp. | 0.87% | 242,900 | $18.6M | Add +15.7% |
| AAOI Applied Optoelectronics Inc. | 0.86% | 495,815 | $18.3M | Reduce -42.7% |
| CARG Cargurus Inc. | 0.86% | 500,000 | $18.3M | New |
| TNDM Tandem Diabetes Care Inc. | 0.86% | 506,600 | $18.2M | Add +13.1% |
| CCS Century Communities Inc. | 0.86% | 248,000 | $18.2M | Add +28.7% |
| BOX Box Inc. Class A | 0.83% | 558,500 | $17.6M | Add +7.0% |
| HAE Haemonetics Corp. | 0.83% | 224,920 | $17.6M | Add +26.5% |
| ELF Elf Beauty Inc. | 0.81% | 137,700 | $17.3M | Add +258.6% |
| ACIW Aci Worldwide Inc. | 0.81% | 333,012 | $17.3M | Add +61.9% |
| AIZ Assurant Inc. | 0.81% | 81,000 | $17.3M | Add +18.4% |
| GAP The Gap Inc. | 0.81% | 726,500 | $17.2M | New |
| OSIS Osi Systems Inc. | 0.79% | 100,400 | $16.8M | Add +45.1% |
| DECK Deckers Outdoor Corp. | 0.79% | 82,340 | $16.7M | Add +58.8% |
| AMSC American Superconductor Corp. | 0.77% | 664,400 | $16.4M | No change |
| YOU Clear Secure Inc. Class A | 0.77% | 609,400 | $16.2M | Add +5.2% |
| CAMT Camtek Ltd. | 0.76% | 199,980 | $16.2M | Add +12.2% |
| AVAV Aerovironment Inc. | 0.75% | 102,720 | $15.8M | Add +10.8% |
| CLBT Cellebrite Di Ltd. | 0.72% | 692,910 | $15.3M | Add +1.2% |
| FORM Formfactor Inc. | 0.70% | 337,480 | $14.8M | Add +2.0% |
| IMAX Imax Corp. | 0.70% | 579,600 | $14.8M | Add +29.7% |
| OMCL Omnicell Inc. | 0.70% | 333,200 | $14.8M | New |
| DOCN Digitalocean Holdings Inc. | 0.68% | 425,700 | $14.5M | Add +0.8% |
| BFAM Bright Horizons Family Solut | 0.68% | 129,904 | $14.4M | Add +39.2% |
| OLED Universal Display Corp. | 0.68% | 97,993 | $14.3M | Reduce -0.2% |
| CRS Carpenter Technology | 0.67% | 83,441 | $14.2M | Add +8.0% |
| DLB Dolby Laboratories Inc. Class A | 0.67% | 181,000 | $14.1M | New |
| COOP Mr Cooper Group Inc. | 0.67% | 147,100 | $14.1M | Add +1.7% |
| FN Fabrinet | 0.66% | 63,800 | $14.0M | Add +11.5% |
| FRPT Freshpet Inc. | 0.66% | 94,300 | $14.0M | New |
| CBT Cabot Corp. | 0.66% | 152,800 | $14.0M | No change |
| BLBD Blue Bird Corp. | 0.65% | 358,900 | $13.9M | Add +20.0% |
| SFM Sprouts Farmers Market Inc. | 0.65% | 108,500 | $13.8M | No change |
| RSI Rush Street Interactive Inc. | 0.64% | 991,900 | $13.6M | Add +2.1% |
| PEGA Pegasystems Inc. | 0.64% | 145,500 | $13.6M | New |
| FRSH Freshworks Inc. Class A | 0.63% | 826,600 | $13.4M | New |
| AMBA Ambarella Inc. | 0.63% | 182,800 | $13.3M | Add +12.8% |
| NEO Neogenomics Inc. | 0.60% | 768,700 | $12.7M | Add +7.0% |
| SRAD Sportradar Group AG-A | 0.60% | 728,900 | $12.6M | New |
| STRA Strategic Education Inc. | 0.59% | 134,500 | $12.6M | Add +30.6% |
| WEAV Weave Communications Inc. | 0.58% | 770,150 | $12.3M | Add +26.4% |
| QTWO Q2 Holdings Inc. filed as Q2 HLDGS INC | 0.55% | 116,500 | $11.7M | Add +17.0% |
| TILE Interface Inc. | 0.55% | 480,100 | $11.7M | Add +17.1% |
| LOPE Grand Canyon Education Inc. | 0.55% | 71,200 | $11.7M | Add +4.1% |
| BROS Dutch Bros Inc. Class A | 0.54% | 219,000 | $11.5M | No change |
| GDYN Grid Dynamics Holdings Inc. | 0.53% | 503,000 | $11.2M | Add +24.5% |
| SPXC SPX Technologies Inc. | 0.52% | 75,400 | $11.0M | Add +22.0% |
| ICHR Ichor Holdings Ltd. | 0.51% | 337,800 | $10.9M | New |
| CBSH Commerce Bancshares Inc. | 0.49% | 167,790 | $10.5M | Add +41.8% |
| OSPN Onespan Inc. | 0.48% | 545,450 | $10.1M | Add +47.1% |
| DUOL Duolingo | 0.47% | 31,000 | $10.1M | No change |
| CPRX Catalyst Pharmaceuticals Inc. | 0.46% | 467,100 | $9.7M | Add +1.9% |
| UAA Under Armour Inc. Class A | 0.45% | 1,153,200 | $9.5M | New |
| WGS Genedx Holdings Corp. | 0.45% | 123,500 | $9.5M | Add +1.2% |
| LMB Limbach Holdings Inc. | 0.45% | 110,800 | $9.5M | No change |
| LMAT Lemaitre Vascular Inc. | 0.44% | 102,305 | $9.4M | Add +1.6% |
| OSW Onespaworld Holdings Ltd. | 0.44% | 465,400 | $9.3M | Add +10.1% |
| CDNA Caredx Inc. | 0.43% | 423,471 | $9.1M | Add +43.8% |
| ABCB Ameris Bancorp | 0.42% | 144,100 | $9.0M | Add +12.7% |
| AORT Artivion Inc. | 0.42% | 312,900 | $8.9M | Add +10.8% |
| FIVE Five Below | 0.42% | 85,000 | $8.9M | New |
| PLYA Playa Hotels & Resorts NV | 0.42% | 705,100 | $8.9M | Reduce -8.7% |
| HQY Healthequity Inc. | 0.41% | 91,500 | $8.8M | Add +8.4% |
| PAYO Payoneer Global Inc. | 0.41% | 858,691 | $8.6M | No change |
| SPSC SPS Commerce Inc. | 0.40% | 46,600 | $8.6M | Add +34.3% |
| COCO The Vita Coco Co. Inc. | 0.40% | 231,500 | $8.5M | Add +39.7% |
| SIMO Silicon Motion Technol-ADR | 0.40% | 157,900 | $8.5M | Reduce -43.1% |
| WAY Waystar Holding Corp. | 0.40% | 231,300 | $8.5M | New |
| EXLS Exlservice Holdings Inc. | 0.40% | 190,800 | $8.5M | Add +5.4% |
| EZPW Ezcorp Inc. Class A | 0.39% | 685,500 | $8.4M | No change |
Portfolio Sells Q3 2024 → Q4 2024
| TMDX Transmedics Group Inc. | Sold out | 0.00% | −1.36 |
| CROX Crocs Inc. | Sold out | 0.00% | −1.13 |
| LNTH Lantheus Holdings Inc. | Sold out | 0.00% | −1.08 |
| TDW Tidewater Inc. | Sold out | 0.00% | −0.78 |
| IBP Installed Building Products | Sold out | 0.00% | −0.70 |
| BMI Badger Meter Inc. | Sold out | 0.00% | −0.67 |
| VRT Vertiv Holdings Co. Class A | Sold out | 0.00% | −0.64 |
| ACLS Axcelis Technologies Inc. | Sold out | 0.00% | −0.64 |
| NXT Nextpower Inc. | Sold out | 0.00% | −0.63 |
| ICFI Icf International Inc. | Reduce -41.2% | 0.38% | −0.60 |
| ITGR Integer Holdings Corp. | Sold out | 0.00% | −0.59 |
| PETQ Petiq Inc. | Sold out | 0.00% | −0.54 |
| OSK Oshkosh Corp. | Sold out | 0.00% | −0.54 |
| WFRD Weatherford International PL | Reduce -18.1% | 0.93% | −0.53 |
| MMS Maximus Inc. | Sold out | 0.00% | −0.51 |
| MYGN Myriad Genetics Inc. | Sold out | 0.00% | −0.51 |
| FIX Comfort Systems USA Inc. | Sold out | 0.00% | −0.50 |
| INSW International Seaways Inc. | Sold out | 0.00% | −0.49 |
| ESAB Esab Corp. | Sold out | 0.00% | −0.49 |
| SIMO Silicon Motion Technol-ADR | Reduce -43.1% | 0.40% | −0.46 |
| OLED Universal Display Corp. | Reduce -0.2% | 0.68% | −0.38 |
| AEHR Aehr Test Systems | Sold out | 0.00% | −0.35 |
| ATI Ati Inc. | Sold out | 0.00% | −0.34 |
| BLKB Blackbaud Inc. | Sold out | 0.00% | −0.33 |
| KWR Quaker Chemical Corporation | Sold out | 0.00% | −0.33 |
| ERII Energy Recovery Inc. | Sold out | 0.00% | −0.32 |
| LBRT Liberty Energy Inc. | Sold out | 0.00% | −0.32 |
| MSA Msa Safety Inc. | Sold out | 0.00% | −0.32 |
| VECO Veeco Instruments Inc. | Reduce -37.0% | 0.26% | −0.29 |
| CECO Ceco Environmental Corp. | Sold out | 0.00% | −0.29 |
| RXST Rxsight Inc. | Reduce -85.0% | 0.03% | −0.29 |
| PSN Parsons Corp. | Reduce -0.1% | 1.16% | −0.26 |
| LNWO Light & Wonder Inc. | Sold out | 0.00% | −0.26 |
| FCFS Firstcash Holdings Inc. | Reduce -28.4% | 0.34% | −0.23 |
| BOOT Boot Barn Holdings Inc. | Reduce -26.8% | 0.36% | −0.23 |
| HLIT Harmonic Inc. | Sold out | 0.00% | −0.23 |
| AVNW Aviat Networks Inc. | Sold out | 0.00% | −0.22 |
| DVAX Dynavax Technologies Corp. | Sold out | 0.00% | −0.21 |
| SIBN Si-Bone Inc. | Sold out | 0.00% | −0.20 |
| CLH Clean Harbors Inc. | Reduce -2.8% | 1.11% | −0.19 |
| ARLO Arlo Technologies Inc. | Sold out | 0.00% | −0.17 |
| EPAC Enerpac Tool Group Corp. | Sold out | 0.00% | −0.17 |
| LPG Dorian LPG Ltd. | Sold out | 0.00% | −0.15 |
| AXTI Axt Inc. | Sold out | 0.00% | −0.11 |
| AOSL Alpha & Omega Semiconductor | Reduce -13.2% | 0.31% | −0.08 |
| PDD PDD Holdings Inc. | Reduce -29.4% | 0.05% | −0.06 |
| MPWR Monolithic Power Systems Inc. | Sold out | 0.00% | −0.04 |
| FUTU Futu Holdings Ltd.-ADR | Reduce -45.8% | 0.02% | −0.03 |
| MMYT Makemytrip Ltd. | Reduce -54.6% | 0.03% | −0.03 |
| EMBJ Embraer SA-Spon ADR | Sold out | 0.00% | −0.02 |
Portfolio Buys Q3 2024 → Q4 2024
| CRDO Credo Technology Group Holdi | Add +15.8% | 3.04% | +1.73 |
| DORM Dorman Products Inc. | New | 1.10% | +1.10 |
| RMBS Rambus Inc. | New | 1.02% | +1.02 |
| ACA Arcosa Inc. | New | 0.93% | +0.93 |
| CARG Cargurus Inc. | New | 0.86% | +0.86 |
| GAP The Gap Inc. | New | 0.81% | +0.81 |
| OMCL Omnicell Inc. | New | 0.70% | +0.70 |
| DLB Dolby Laboratories Inc. Class A | New | 0.67% | +0.67 |
| FRPT Freshpet Inc. | New | 0.66% | +0.66 |
| PEGA Pegasystems Inc. | New | 0.64% | +0.64 |
| FRSH Freshworks Inc. Class A | New | 0.63% | +0.63 |
| ELF Elf Beauty Inc. | Add +258.6% | 0.81% | +0.60 |
| SRAD Sportradar Group AG-A | New | 0.60% | +0.60 |
| LRN Stride Inc. | Add +80.6% | 1.02% | +0.51 |
| ICHR Ichor Holdings Ltd. | New | 0.51% | +0.51 |
| UAA Under Armour Inc. Class A | New | 0.45% | +0.45 |
| FIVE Five Below | New | 0.42% | +0.42 |
| DOCS Doximity Inc. Class A | Add +23.8% | 1.44% | +0.41 |
| WAY Waystar Holding Corp. | New | 0.40% | +0.40 |
| DECK Deckers Outdoor Corp. | Add +58.8% | 0.79% | +0.36 |
| NVMI Nova Ltd. | Add +77.9% | 1.03% | +0.36 |
| PRMB Primo Brands Corp. | Add +44.1% | 0.92% | +0.35 |
| QLYS Qualys Inc. | New | 0.32% | +0.32 |
| BPMC Blueprint Medicines Corp. | New | 0.31% | +0.31 |
| SKYW Skywest Inc. | Add +14.9% | 1.51% | +0.30 |
| MBUU Malibu Boats Inc. Class A | New | 0.30% | +0.30 |
| MD Pediatrix Medical Group Inc. | New | 0.29% | +0.29 |
| DCO Ducommun Inc. | New | 0.29% | +0.29 |
| ACIW Aci Worldwide Inc. | Add +61.9% | 0.81% | +0.28 |
| BRBR Bellring Brands Inc. | Add +22.9% | 0.90% | +0.26 |
| OSIS Osi Systems Inc. | Add +45.1% | 0.79% | +0.25 |
| PRIM Primoris Services Corp. | Add +15.7% | 0.87% | +0.25 |
| QNST Quinstreet Inc. | New | 0.24% | +0.24 |
| GDYN Grid Dynamics Holdings Inc. | Add +24.5% | 0.53% | +0.24 |
| IMAX Imax Corp. | Add +29.7% | 0.70% | +0.23 |
| MTSI Macom Technology Solutions H | Add +17.0% | 1.10% | +0.22 |
| ATRC Atricure Inc. | New | 0.22% | +0.22 |
| LIVN Livanova PLC | Add +54.7% | 0.96% | +0.20 |
| FTDR Frontdoor Inc. | Add +13.6% | 1.20% | +0.19 |
| BLND Blend Labs Inc. Class A | New | 0.19% | +0.19 |
| FLS Flowserve Corp. | Add +14.3% | 1.27% | +0.18 |
| WGS Genedx Holdings Corp. | Add +1.2% | 0.45% | +0.18 |
| WEAV Weave Communications Inc. | Add +26.4% | 0.58% | +0.18 |
| DESP Despegar.com Corp. | Add +41.3% | 0.35% | +0.18 |
| G Genpact Ltd. | Add +18.4% | 1.06% | +0.17 |
| AIOT Powerfleet Inc. | New | 0.17% | +0.17 |
| COCO The Vita Coco Co. Inc. | Add +39.7% | 0.40% | +0.16 |
| OSPN Onespan Inc. | Add +47.1% | 0.48% | +0.16 |
| AMBA Ambarella Inc. | Add +12.8% | 0.63% | +0.16 |
| TILE Interface Inc. | Add +17.1% | 0.55% | +0.15 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 175 | $4.8B | CRDO, AAOI, DOCN, SIMO, UCTT |
| Q1 2026 | 179 | $3.4B | AAOI, LITE, CRDO, DOCN, SN |
| Q4 2025 | 178 | $2.7B | LITE, CRDO, AAOI, SN, AMBA |
| Q3 2025 | 183 | $2.6B | CRDO, LITE, RMBS, AMBA, SN |
| Q2 2025 | 185 | $2.3B | CRDO, ADMA, AAOI, SN, EHC |
| Q1 2025 | 192 | $2.0B | ADMA, CRDO, SN, EHC, DOCS |
| Q4 2024 | 196 | $2.1B | CRDO, ADMA, SN, ZETA, SKYW |
| Q3 2024 | 206 | $2.0B | ADMA, SN, ZETA, EHC, WFRD |
| Q2 2024 | 197 | $1.6B | WFRD, CSTM, SN, ONTO, TMDX |
| Q1 2024 | 196 | $1.4B | CSTM, WFRD, ACLS, ONTO, ATEC |