Oberweis Asset Management Inc./
In its 13F for Q3 2024 (holdings as of September 30, 2024, filed November 14, 2024), Oberweis Asset Management Inc./ reported 206 stock positions worth $2.0 billion. Its top holding was Adma Biologics (ADMA) at 3.0% of the portfolio, followed by Sharkninja (SN, 2.6%) and Zeta Global Class A (ZETA, 2.5%). Compared with Q2 2024, it opened 35 new positions, sold out of 26, added to 76 and reduced 34. The biggest buy was Adma Biologics (ADMA, shares +42%) and the biggest sale an exit from Constellium (CSTM).
- Most Recent 13F
- Q2 2026
- Location
- LISLE, IL
- CIK
- 0000937886
- Portfolio Value
- $2.0B (Q3 2024)
- SEC Filing
- 0001213900-24-098012 ↗ filed Nov 14, 2024
Holdings Value
Holdings 206 stocks · $2.0B
| ADMA Adma Biologics Inc. | 2.98% | 2,907,080 | $58.1M | Add +42.5% |
| SN Sharkninja Inc. | 2.57% | 462,190 | $50.2M | Add +17.1% |
| ZETA Zeta Global Holdings Corp. Class A | 2.45% | 1,604,130 | $47.9M | Add +1.0% |
| EHC Encompass Health Corp. | 1.52% | 306,608 | $29.6M | Add +4.9% |
| WFRD Weatherford International PL | 1.47% | 336,714 | $28.6M | Add +15.0% |
| PSN Parsons Corp. | 1.42% | 267,720 | $27.8M | Add +79.5% |
| ONTO Onto Innovation Inc. | 1.37% | 129,235 | $26.8M | Reduce -0.2% |
| TMDX Transmedics Group Inc. | 1.36% | 168,690 | $26.5M | Reduce -9.8% |
| CRDO Credo Technology Group Holdi | 1.31% | 828,314 | $25.5M | Add +6.2% |
| CLH Clean Harbors Inc. | 1.30% | 105,370 | $25.5M | Add +2.1% |
| VCYT Veracyte Inc. | 1.25% | 715,920 | $24.4M | Add +9.4% |
| ICUI Icu Medical Inc. | 1.22% | 130,500 | $23.8M | New |
| SKYW Skywest Inc. | 1.21% | 277,650 | $23.6M | Reduce -4.6% |
| CROX Crocs Inc. | 1.13% | 152,900 | $22.1M | Add +20.3% |
| FLS Flowserve Corp. | 1.09% | 409,962 | $21.2M | Add +10.8% |
| LNTH Lantheus Holdings Inc. | 1.08% | 191,400 | $21.0M | New |
| OLED Universal Display Corp. | 1.06% | 98,172 | $20.6M | Reduce -1.9% |
| DOCS Doximity Inc. Class A | 1.03% | 463,100 | $20.2M | New |
| MMSI Merit Medical Systems Inc. | 1.02% | 202,140 | $20.0M | Add +4.3% |
| ITRI Itron Inc. | 1.02% | 186,910 | $20.0M | Add +22.6% |
| CCS Century Communities Inc. | 1.02% | 192,700 | $19.8M | Add +1.4% |
| FTDR Frontdoor Inc. | 1.01% | 411,400 | $19.7M | Add +39.2% |
| YOU Clear Secure Inc. Class A | 0.98% | 579,400 | $19.2M | Add +10.7% |
| ICFI Icf International Inc. | 0.98% | 115,000 | $19.2M | Add +2.8% |
| TNDM Tandem Diabetes Care Inc. | 0.97% | 448,050 | $19.0M | Add +58.9% |
| AVAV Aerovironment Inc. | 0.95% | 92,740 | $18.6M | Add +22.0% |
| ANF Abercrombie & Fitch Co. Class A | 0.92% | 128,500 | $18.0M | Add +41.7% |
| FSS Federal Signal Corp. | 0.91% | 189,730 | $17.7M | Add +22.1% |
| UCTT Ultra Clean Holdings Inc. | 0.90% | 440,100 | $17.6M | Add +37.7% |
| HIMS Hims & Hers Health Inc. | 0.89% | 943,600 | $17.4M | Add +20.2% |
| G Genpact Ltd. | 0.89% | 442,400 | $17.3M | New |
| BOX Box Inc. Class A | 0.88% | 522,000 | $17.1M | New |
| CBT Cabot Corp. | 0.88% | 152,800 | $17.1M | Add +13.6% |
| DOCN Digitalocean Holdings Inc. | 0.87% | 422,200 | $17.1M | New |
| MTSI Macom Technology Solutions H | 0.87% | 153,100 | $17.0M | New |
| SIMO Silicon Motion Technol-ADR | 0.86% | 277,300 | $16.8M | No change |
| AMSC American Superconductor Corp. | 0.80% | 664,400 | $15.7M | No change |
| FORM Formfactor Inc. | 0.78% | 330,780 | $15.2M | Add +8.2% |
| TDW Tidewater Inc. | 0.78% | 211,505 | $15.2M | Add +42.8% |
| LIVN Livanova PLC | 0.77% | 284,685 | $15.0M | Reduce -11.8% |
| BLBD Blue Bird Corp. | 0.73% | 299,100 | $14.3M | No change |
| HAE Haemonetics Corp. | 0.73% | 177,795 | $14.3M | Add +7.6% |
| CAMT Camtek Ltd. | 0.73% | 178,180 | $14.2M | No change |
| IBP Installed Building Products | 0.70% | 55,700 | $13.7M | No change |
| AIZ Assurant Inc. | 0.70% | 68,400 | $13.6M | Add +10.5% |
| FN Fabrinet | 0.69% | 57,200 | $13.5M | Add +105.0% |
| COOP Mr Cooper Group Inc. | 0.68% | 144,600 | $13.3M | New |
| BMI Badger Meter Inc. | 0.67% | 60,300 | $13.2M | Add +17.8% |
| BFAM Bright Horizons Family Solut | 0.67% | 93,304 | $13.1M | New |
| NVMI Nova Ltd. | 0.67% | 62,400 | $13.0M | New |
| VRT Vertiv Holdings Co. Class A | 0.64% | 125,961 | $12.5M | Reduce -2.2% |
| BRBR Bellring Brands Inc. | 0.64% | 206,000 | $12.5M | New |
| ACLS Axcelis Technologies Inc. | 0.64% | 118,779 | $12.5M | Add +29.4% |
| AAOI Applied Optoelectronics Inc. | 0.63% | 865,915 | $12.4M | No change |
| NXT Nextpower Inc. filed as NEXTRACKER INC | 0.63% | 330,300 | $12.4M | Add +18.4% |
| CRS Carpenter Technology | 0.63% | 77,240 | $12.3M | Add +3.4% |
| OSCR Oscar Health Inc. Class A | 0.63% | 576,850 | $12.2M | Add +41.6% |
| PRIM Primoris Services Corp. | 0.62% | 209,900 | $12.2M | No change |
| SFM Sprouts Farmers Market Inc. | 0.61% | 108,500 | $12.0M | No change |
| BOOT Boot Barn Holdings Inc. | 0.59% | 69,400 | $11.6M | No change |
| CLBT Cellebrite Di Ltd. | 0.59% | 684,810 | $11.5M | Add +13.4% |
| ITGR Integer Holdings Corp. | 0.59% | 88,100 | $11.5M | Reduce -26.1% |
| FCFS Firstcash Holdings Inc. | 0.58% | 97,900 | $11.2M | Add +19.1% |
| PRMB Primo Brands Corp. | 0.57% | 438,800 | $11.1M | New |
| VECO Veeco Instruments Inc. | 0.55% | 326,600 | $10.8M | Add +11.9% |
| NEO Neogenomics Inc. | 0.54% | 718,700 | $10.6M | Add +7.5% |
| RSI Rush Street Interactive Inc. | 0.54% | 971,900 | $10.5M | No change |
| OSIS Osi Systems Inc. | 0.54% | 69,200 | $10.5M | No change |
| PETQ Petiq Inc. | 0.54% | 340,700 | $10.5M | No change |
| ACIW Aci Worldwide Inc. | 0.54% | 205,712 | $10.5M | Reduce -50.1% |
| OSK Oshkosh Corp. | 0.54% | 104,249 | $10.4M | Reduce -43.0% |
| WING Wingstop Inc. | 0.52% | 24,400 | $10.2M | No change |
| MMS Maximus Inc. | 0.51% | 106,800 | $9.9M | Reduce -3.4% |
| MYGN Myriad Genetics Inc. | 0.51% | 360,700 | $9.9M | No change |
| SPXC SPX Technologies Inc. | 0.50% | 61,800 | $9.9M | Reduce -17.1% |
| FIX Comfort Systems USA Inc. | 0.50% | 25,200 | $9.8M | Add +4.6% |
| LRN Stride Inc. | 0.50% | 114,800 | $9.8M | Reduce -6.9% |
| LOPE Grand Canyon Education Inc. | 0.50% | 68,400 | $9.7M | Add +32.6% |
| INSW International Seaways Inc. | 0.49% | 186,700 | $9.6M | Add +23.1% |
| ESAB Esab Corp. | 0.49% | 89,800 | $9.5M | Reduce -40.4% |
| STRA Strategic Education Inc. | 0.49% | 103,000 | $9.5M | Add +22.9% |
| LMAT Lemaitre Vascular Inc. | 0.48% | 100,704 | $9.4M | Add +0.0% |
| CDNA Caredx Inc. | 0.47% | 294,500 | $9.2M | Add +17.6% |
| IMAX Imax Corp. | 0.47% | 447,000 | $9.2M | Add +18.9% |
| AMBA Ambarella Inc. | 0.47% | 162,000 | $9.1M | New |
| CPRX Catalyst Pharmaceuticals Inc. | 0.47% | 458,400 | $9.1M | No change |
| DUOL Duolingo | 0.45% | 31,000 | $8.7M | Add +12.7% |
| KRYS Krystal Biotech Inc. | 0.44% | 46,800 | $8.5M | Add +9.9% |
| ACMR Acm Research Inc. Class A | 0.43% | 416,500 | $8.5M | Reduce -5.6% |
| LMB Limbach Holdings Inc. | 0.43% | 110,800 | $8.4M | Reduce -32.8% |
| EOLS Evolus Inc. | 0.43% | 514,900 | $8.3M | No change |
| DECK Deckers Outdoor Corp. | 0.42% | 51,840 | $8.3M | Reduce -8.6% |
| ABCB Ameris Bancorp | 0.41% | 127,900 | $8.0M | New |
| QTWO Q2 Holdings Inc. filed as Q2 HLDGS INC | 0.41% | 99,590 | $7.9M | Add +18.4% |
| VRNS Varonis Systems Inc. | 0.40% | 139,800 | $7.9M | New |
| AMPH Amphastar Pharmaceuticals Inc. | 0.40% | 161,155 | $7.8M | Add +19.3% |
| WEAV Weave Communications Inc. | 0.40% | 609,400 | $7.8M | No change |
| TILE Interface Inc. | 0.40% | 409,900 | $7.8M | New |
| EZPW Ezcorp Inc. Class A | 0.39% | 685,500 | $7.7M | No change |
| AOSL Alpha & Omega Semiconductor | 0.39% | 204,700 | $7.6M | Add +13.7% |
Portfolio Sells Q2 2024 → Q3 2024
| CSTM Constellium SE | Sold out | 0.00% | −2.12 |
| RAMP Liveramp Holdings Inc. | Sold out | 0.00% | −0.97 |
| WWD Woodward Inc. | Sold out | 0.00% | −0.87 |
| ATEC Alphatec Holdings Inc. | Sold out | 0.00% | −0.85 |
| AZEK The Azek Co. Inc. | Sold out | 0.00% | −0.79 |
| SLAB Silicon Laboratories Inc. | Sold out | 0.00% | −0.74 |
| INFA Informatica Inc. Class A | Sold out | 0.00% | −0.72 |
| ELF Elf Beauty Inc. | Reduce -45.1% | 0.21% | −0.69 |
| OSK Oshkosh Corp. | Reduce -43.0% | 0.54% | −0.68 |
| ACIW Aci Worldwide Inc. | Reduce -50.1% | 0.54% | −0.47 |
| PFBC Preferred Bank/Los Angeles | Sold out | 0.00% | −0.44 |
| JBI Janus International Group Inc. | Sold out | 0.00% | −0.43 |
| PRMW Primo Water Corp. | Sold out | 0.00% | −0.43 |
| CECO Ceco Environmental Corp. | Reduce -49.0% | 0.29% | −0.41 |
| TREX Trex Company Inc. | Sold out | 0.00% | −0.41 |
| ALGM Allegro Microsystems Inc. | Sold out | 0.00% | −0.39 |
| ESAB Esab Corp. | Reduce -40.4% | 0.49% | −0.38 |
| TMDX Transmedics Group Inc. | Reduce -9.8% | 1.36% | −0.37 |
| ROCK Gibraltar Industries Inc. | Sold out | 0.00% | −0.37 |
| ONTO Onto Innovation Inc. | Reduce -0.2% | 1.37% | −0.37 |
| LIVN Livanova PLC | Reduce -11.8% | 0.77% | −0.32 |
| UPWK Upwork Inc. | Sold out | 0.00% | −0.31 |
| MSA Msa Safety Inc. | Reduce -31.6% | 0.32% | −0.27 |
| ITGR Integer Holdings Corp. | Reduce -26.1% | 0.59% | −0.26 |
| SKYW Skywest Inc. | Reduce -4.6% | 1.21% | −0.25 |
| NVTS Navitas Semiconductor Corp. | Sold out | 0.00% | −0.24 |
| KWR Quaker Chemical Corporation | Reduce -30.7% | 0.33% | −0.24 |
| OLED Universal Display Corp. | Reduce -1.9% | 1.06% | −0.23 |
| MBWM Mercantile Bank Corp. | Sold out | 0.00% | −0.22 |
| TRNS Transcat Inc. | Sold out | 0.00% | −0.21 |
| ACMR Acm Research Inc. Class A | Reduce -5.6% | 0.43% | −0.19 |
| PRLB Proto Labs Inc. | Sold out | 0.00% | −0.18 |
| VSEC Vse Corp. | Reduce -31.8% | 0.19% | −0.17 |
| PLAB Photronics Inc. | Reduce -30.1% | 0.24% | −0.17 |
| BJRI Bj's Restaurants Inc. | Sold out | 0.00% | −0.15 |
| LMB Limbach Holdings Inc. | Reduce -32.8% | 0.43% | −0.14 |
| SPXC SPX Technologies Inc. | Reduce -17.1% | 0.50% | −0.14 |
| OXM Oxford Industries Inc. | Sold out | 0.00% | −0.14 |
| DECK Deckers Outdoor Corp. | Reduce -8.6% | 0.42% | −0.14 |
| CDNS Cadence Design SYS Inc. | Reduce -28.1% | 0.13% | −0.11 |
| TSM Taiwan Semiconductor-SP ADR | Reduce -32.4% | 0.11% | −0.09 |
| MMS Maximus Inc. | Reduce -3.4% | 0.51% | −0.07 |
| TME Tencent Music Entertainm-ADR | Sold out | 0.00% | −0.07 |
| RES RPC Inc. | Reduce -4.6% | 0.20% | −0.05 |
| VRT Vertiv Holdings Co. Class A | Reduce -2.2% | 0.64% | −0.04 |
| DIDIY Didi Global Inc. | Sold out | 0.00% | −0.03 |
| LRN Stride Inc. | Reduce -6.9% | 0.50% | −0.03 |
| BZ Kanzhun Ltd. - ADR | Sold out | 0.00% | −0.03 |
| MU Micron Technology Inc. | Sold out | 0.00% | −0.02 |
| MMYT Makemytrip Ltd. | Reduce -19.5% | 0.07% | −0.02 |
Portfolio Buys Q2 2024 → Q3 2024
| ADMA Adma Biologics Inc. | Add +42.5% | 2.98% | +1.58 |
| ICUI Icu Medical Inc. | New | 1.22% | +1.22 |
| LNTH Lantheus Holdings Inc. | New | 1.08% | +1.08 |
| DOCS Doximity Inc. Class A | New | 1.03% | +1.03 |
| G Genpact Ltd. | New | 0.89% | +0.89 |
| BOX Box Inc. Class A | New | 0.88% | +0.88 |
| DOCN Digitalocean Holdings Inc. | New | 0.87% | +0.87 |
| MTSI Macom Technology Solutions H | New | 0.87% | +0.87 |
| SN Sharkninja Inc. | Add +17.1% | 2.57% | +0.76 |
| ZETA Zeta Global Holdings Corp. Class A | Add +1.0% | 2.45% | +0.73 |
| COOP Mr Cooper Group Inc. | New | 0.68% | +0.68 |
| PSN Parsons Corp. | Add +79.5% | 1.42% | +0.67 |
| BFAM Bright Horizons Family Solut | New | 0.67% | +0.67 |
| NVMI Nova Ltd. | New | 0.67% | +0.67 |
| BRBR Bellring Brands Inc. | New | 0.64% | +0.64 |
| PRMB Primo Brands Corp. | New | 0.57% | +0.57 |
| AMBA Ambarella Inc. | New | 0.47% | +0.47 |
| ABCB Ameris Bancorp | New | 0.41% | +0.41 |
| VRNS Varonis Systems Inc. | New | 0.40% | +0.40 |
| FTDR Frontdoor Inc. | Add +39.2% | 1.01% | +0.40 |
| TILE Interface Inc. | New | 0.40% | +0.40 |
| YOU Clear Secure Inc. Class A | Add +10.7% | 0.98% | +0.38 |
| VCYT Veracyte Inc. | Add +9.4% | 1.25% | +0.38 |
| CBSH Commerce Bancshares Inc. | New | 0.36% | +0.36 |
| PAYO Payoneer Global Inc. | New | 0.33% | +0.33 |
| ERII Energy Recovery Inc. | New | 0.32% | +0.32 |
| PRG Prog Holdings Inc. | New | 0.32% | +0.32 |
| RDWR Radware Ltd. | New | 0.30% | +0.30 |
| GDYN Grid Dynamics Holdings Inc. | New | 0.29% | +0.29 |
| FBK FB Financial Corp. | New | 0.29% | +0.29 |
| TNDM Tandem Diabetes Care Inc. | Add +58.9% | 0.97% | +0.28 |
| FN Fabrinet | Add +105.0% | 0.69% | +0.27 |
| KNSA Kiniksa Pharmaceuticals Inte | New | 0.26% | +0.26 |
| CDNA Caredx Inc. | Add +17.6% | 0.47% | +0.23 |
| OSCR Oscar Health Inc. Class A | Add +41.6% | 0.63% | +0.23 |
| AGX Argan Inc. | New | 0.23% | +0.23 |
| NIC Nicolet Bankshares Inc. | New | 0.23% | +0.23 |
| HLIT Harmonic Inc. | New | 0.23% | +0.23 |
| BVS Bioventus Inc. Class A | Add +34.1% | 0.31% | +0.18 |
| AXGN Axogen Inc. | New | 0.16% | +0.16 |
| NGVC Natural Grocers BY Vitamin C | New | 0.16% | +0.16 |
| CLBT Cellebrite Di Ltd. | Add +13.4% | 0.59% | +0.15 |
| CRS Carpenter Technology | Add +3.4% | 0.63% | +0.13 |
| CBT Cabot Corp. | Add +13.6% | 0.88% | +0.12 |
| FSS Federal Signal Corp. | Add +22.1% | 0.91% | +0.11 |
| AVAV Aerovironment Inc. | Add +22.0% | 0.95% | +0.10 |
| ITRI Itron Inc. | Add +22.6% | 1.02% | +0.10 |
| DUOL Duolingo | Add +12.7% | 0.45% | +0.10 |
| QTWO Q2 Holdings Inc. | Add +18.4% | 0.41% | +0.10 |
| BMI Badger Meter Inc. | Add +17.8% | 0.67% | +0.09 |
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 |