Q3 2023 · 13F-HR
OBERWEIS ASSET MANAGEMENT INC/holdings as filed
Filed 2023-11-14 · accession 0001213900-23-086509
$941.5M
Reported value
195
Positions
2023-09-30
Period end
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| F21107101 | CSTM | Constellium NV Cl A | $53.4M | 5.67% | 2,933,071 | Common | SOLE |
| 00760J108 | AEHR | Aehr Test Systems | $41.6M | 4.42% | 910,108 | Common | SOLE |
| 054540208 | ACLS | Axcelis Technologies | $31.6M | 3.35% | 193,559 | Common | SOLE |
| G48833118 | WFRD | Weatherford International PLC | $17.8M | 1.89% | 196,920 | Common | SOLE |
| 02081G201 | ATEC | Alphatec Hldgs Inc. | $16.0M | 1.70% | 1,236,040 | Common | SOLE |
| M78673114 | PERI | Perion Network, Ltd. | $14.4M | 1.53% | 470,290 | Common | SOLE |
| 92537N108 | VRT | Vertiv Holdings Co. | $14.2M | 1.51% | 380,990 | Common | SOLE |
| 92337F107 | VCYT | Veracyte, Inc. | $13.3M | 1.42% | 597,540 | Common | SOLE |
| 243537107 | DECK | Deckers Outdoor Corp. | $13.2M | 1.40% | 25,700 | Common | SOLE |
| 516544103 | LNTH | Lantheus Hldgs Inc. | $11.8M | 1.25% | 169,340 | Common | SOLE |
| 44925C103 | ICFI | ICF International, Inc. | $11.6M | 1.23% | 95,700 | Common | SOLE |
| M20791105 | CAMT | Camtek, Ltd. | $10.4M | 1.10% | 166,380 | Common | SOLE |
| 91347P105 | OLED | Universal Display Corp. | $9.7M | 1.03% | 62,015 | Common | SOLE |
| 30226D106 | EXTR | Extreme Networks, Inc. | $9.2M | 0.98% | 381,470 | Common | SOLE |
| 05465P101 | AXNX* | Axonics, Inc. | $9.1M | 0.96% | 161,620 | Common | SOLE |
| 077454106 | BDC | Belden, Inc. | $8.8M | 0.94% | 91,480 | Common | SOLE |
| 34354P105 | FLS | Flowserve Corporation | $8.4M | 0.89% | 210,840 | Common | SOLE |
| 89377M109 | TMDX | TransMedics Group, Inc. | $8.3M | 0.88% | 151,100 | Common | SOLE |
| 859241101 | STRL | Sterling Construction Co., Inc | $8.1M | 0.86% | 110,000 | Common | SOLE |
| 92839U206 | VC | Visteon Corp. | $8.0M | 0.85% | 57,970 | Common | SOLE |
| 008073108 | AVAV | Aerovironment, Inc. | $7.7M | 0.82% | 69,100 | Common | SOLE |
| 184496107 | CLH | Clean Harbors, Inc. | $7.6M | 0.81% | 45,415 | Common | SOLE |
| 29261A100 | EHC | Encompass Health Corporation | $7.5M | 0.80% | 111,600 | Common | SOLE |
| 000899104 | ADMA | ADMA Biologics, Inc. | $7.4M | 0.79% | 2,078,400 | Common | SOLE |
| 739276103 | POWI | Power Integrations | $7.2M | 0.77% | 94,573 | Common | SOLE |
| 01749D105 | ALGM | Allegro MicroSystems, Inc. | $7.2M | 0.77% | 225,930 | Common | SOLE |
| 70202L102 | PSN | Parsons Corp. | $7.1M | 0.76% | 131,300 | Common | SOLE |
| 03209R103 | AMPH | Amphastar Pharmaceuticals, Inc | $7.0M | 0.74% | 152,500 | Common | SOLE |
| 30050B101 | EVH | Evolent Health, Inc. | $7.0M | 0.74% | 255,460 | Common | SOLE |
| 227046109 | CROX | Crocs, Inc. | $6.9M | 0.74% | 78,730 | Common | SOLE |
| 405024100 | HAE | Haemonetics Corp. | $6.9M | 0.74% | 77,400 | Common | SOLE |
| 825704109 | SIBN | SI-BONE, Inc. | $6.7M | 0.71% | 315,100 | Common | SOLE |
| 125141101 | CECO | CECO Environmental Corp. | $6.7M | 0.71% | 416,700 | Common | SOLE |
| 589889104 | MMSI | Merit Medical System Inc | $6.6M | 0.70% | 95,660 | Common | SOLE |
| 346375108 | FORM | Formfactor Inc. | $6.6M | 0.70% | 188,100 | Common | SOLE |
| 095306106 | BLBD | Blue Bird Corporation | $6.5M | 0.70% | 306,500 | Common | SOLE |
| 90385V107 | UCTT | Ultra Clean Holdings | $6.5M | 0.69% | 218,100 | Common | SOLE |
| 922417100 | VECO | Veeco Instruments, Inc. | $6.4M | 0.68% | 226,800 | Common | SOLE |
| 63942X106 | NVTS | Navitas Semiconductor Corp. | $6.3M | 0.67% | 912,500 | Common | SOLE |
| 749660106 | RES | RPC, Inc. | $6.3M | 0.67% | 708,576 | Common | SOLE |
| 33768G107 | FCFS | FirstCash Holdings, Inc | $6.2M | 0.66% | 61,700 | Common | SOLE |
| 00108J109 | ACMR | ACM Research, Inc. Class A | $6.2M | 0.66% | 341,800 | Common | SOLE |
| 980745103 | WWD | Woodward, Inc. | $6.1M | 0.64% | 48,800 | Common | SOLE |
| 607525102 | MODNEUR | Model N, Inc. | $5.9M | 0.63% | 241,430 | Common | SOLE |
| 404251100 | HNI | HNI Corp. | $5.9M | 0.62% | 169,700 | Common | SOLE |
| 74164F103 | PRIM | Primoris Services Corp. | $5.8M | 0.62% | 178,600 | Common | SOLE |
| 447462102 | HURN | Huron Consulting Group, Inc. | $5.8M | 0.62% | 55,900 | Common | SOLE |
| 92242T101 | VVX | V2X, Inc. | $5.8M | 0.62% | 112,500 | Common | SOLE |
| 077347300 | BELFB | Bel Fuse, Inc. | $5.8M | 0.62% | 121,500 | Common | SOLE |
| 268158201 | DVAX | Dynavax Technologies Corp. | $5.7M | 0.60% | 385,200 | Common | SOLE |
| 55303J106 | MGPI | MGP Ingredients, Inc. | $5.7M | 0.60% | 53,650 | Common | SOLE |
| 98956A105 | ZETA | Zeta Global Holdings Corp. | $5.6M | 0.60% | 674,700 | Common | SOLE |
| 458334109 | IPAR | Inter Parfums | $5.6M | 0.59% | 41,600 | Common | SOLE |
| 01973R101 | ALSN | Allison Transmission Holdings, | $5.6M | 0.59% | 94,100 | Common | SOLE |
| 78473E103 | SPXC | SPX Technologies, Inc. | $5.5M | 0.59% | 68,000 | Common | SOLE |
| 81282v100 | — | SeaWorld Entertainment Inc. | $5.5M | 0.59% | 119,280 | Common | SOLE |
| M5425M103 | INMD | Inmode Ltd. | $5.5M | 0.58% | 180,260 | Common | SOLE |
| 00404A109 | ACHC | Acadia Healthcare Co., Inc. | $5.5M | 0.58% | 77,800 | Common | SOLE |
| 313855108 | FSS | Federal Signal Corp. | $5.5M | 0.58% | 91,400 | Common | SOLE |
| 17273K109 | — | CIRCOR International, Inc. | $5.5M | 0.58% | 97,900 | Common | SOLE |
| 68404L201 | OPCH | Option Care Health Inc. | $5.4M | 0.58% | 167,800 | Common | SOLE |
| 683344105 | ONTO | Onto Innovation, Inc. | $5.2M | 0.56% | 41,100 | Common | SOLE |
| 688239201 | OSK | Oshkosh Corp. | $5.2M | 0.55% | 54,136 | Common | SOLE |
| 740367404 | PFBC | Preferred Bank | $5.1M | 0.55% | 82,600 | Common | SOLE |
| 03823U102 | AAOI | Applied Optoelectronics Inc. | $5.1M | 0.55% | 468,415 | Common | SOLE |
| N70544106 | PL0 | Playa Hotels & Resorts N.V. | $5.1M | 0.54% | 701,500 | Common | SOLE |
| 35905A109 | FTDR | Frontdoor, Inc. | $5.0M | 0.54% | 164,700 | Common | SOLE |
| 099406100 | BOOT | Boot Barn Hldgs, Inc. | $4.9M | 0.52% | 60,800 | Common | SOLE |
| 302301106 | EZPW | EZCorp, Inc. | $4.9M | 0.52% | 595,300 | Common | SOLE |
| 27032D304 | — | Earthstone Energy Inc. | $4.9M | 0.52% | 240,600 | Common | SOLE |
| 428291108 | HXL | Hexcel Corporation | $4.8M | 0.51% | 73,300 | Common | SOLE |
| 50216C108 | LYTS | LSI Industries Inc. | $4.7M | 0.50% | 298,700 | Common | SOLE |
| 03820c105 | — | Applied Industrial | $4.7M | 0.50% | 30,500 | Common | SOLE |
| 89455T109 | TMCI | Treace Medical Concepts, Inc. | $4.7M | 0.50% | 355,600 | Common | SOLE |
| 719405102 | PLAB | Photronics, Inc. | $4.7M | 0.49% | 230,100 | Common | SOLE |
| 87357P100 | TCMD | Tactile Sys Technology, Inc. | $4.6M | 0.49% | 330,350 | Common | SOLE |
| 292218104 | EIG | Employers Holdings, Inc. | $4.5M | 0.48% | 112,200 | Common | SOLE |
| 78469C103 | SPUSD | SP Plus Corporation | $4.4M | 0.47% | 122,500 | Common | SOLE |
| 01748X102 | ALGT | Allegiant Travel Co. | $4.4M | 0.46% | 56,762 | Common | SOLE |
| 387328107 | GVA | Granite Construction | $4.4M | 0.46% | 114,600 | Common | SOLE |
| 253798102 | DGII | Digi International I | $4.3M | 0.46% | 161,100 | Common | SOLE |
| 71639T106 | PETQEUR | PetlQ Inc | $4.3M | 0.46% | 219,600 | Common | SOLE |
| 86800U104 | SMCIUSD | Super Micro Computer Inc. | $4.3M | 0.46% | 15,700 | Common | SOLE |
| 94724R108 | WEAV | Weave Communications, Inc. | $4.3M | 0.45% | 523,600 | Common | SOLE |
| 23291C103 | BOOM | DMC Global, Inc. | $4.3M | 0.45% | 174,100 | Common | SOLE |
| 866683105 | SNCY | Sun Country Airlines Holdings, | $4.2M | 0.45% | 283,000 | Common | SOLE |
| 002896207 | ANF | Abercrombie & Fitch Co. | $4.1M | 0.44% | 73,500 | Common | SOLE |
| 577933104 | MMS | Maximus, Inc. | $4.1M | 0.44% | 55,200 | Common | SOLE |
| 747316107 | KWR | Quaker Chemical Corporation | $4.1M | 0.43% | 25,500 | Common | SOLE |
| 47103N106 | JBI | Janus International Group, Inc | $4.1M | 0.43% | 378,600 | Common | SOLE |
| 127387108 | CDNS | Cadence Design System, Inc. | $4.0M | 0.43% | 17,200 | Common | SOLE |
| 404030108 | HEESEUR | H&E Equipment Services, Inc. | $4.0M | 0.42% | 92,200 | Common | SOLE |
| 05366Y201 | AVNW | Aviat Networks, Inc. | $3.9M | 0.42% | 125,307 | Common | SOLE |
| 01741R102 | ATI | ATI, Inc. | $3.9M | 0.42% | 95,000 | Common | SOLE |
| 65290E101 | NXT | Nextracker, Inc. | $3.9M | 0.42% | 97,300 | Common | SOLE |
| Y41053102 | INSW | International Seaways, Inc. | $3.9M | 0.41% | 86,500 | Common | SOLE |
| 607828100 | MOD | Modine Mfg Co Com | $3.9M | 0.41% | 84,600 | Common | SOLE |
| 91529Y106 | UNM | UNUM Group | $3.8M | 0.40% | 76,700 | Common | SOLE |
| 228903100 | AORT | Artivion, Inc | $3.8M | 0.40% | 248,200 | Common | SOLE |
| 42330P107 | HLX | Helix Energy Solutions Group, | $3.7M | 0.40% | 335,600 | Common | SOLE |
| 55305B101 | MHO | M/I Homes, Inc. | $3.7M | 0.40% | 44,300 | Common | SOLE |
| G3323L100 | FN | Fabrinet | $3.7M | 0.39% | 22,200 | Common | SOLE |
| 18538R103 | CLW | Clearwater Paper Corp | $3.7M | 0.39% | 101,000 | Common | SOLE |
| 703481101 | PTEN | Patterson-Uti Energy, Inc. | $3.6M | 0.38% | 261,700 | Common | SOLE |
| 64049M209 | NEO | NeoGenomics, Inc. | $3.6M | 0.38% | 293,400 | Common | SOLE |
| 36237H101 | GIII | G-III Apparel Group Ltd. | $3.6M | 0.38% | 144,000 | Common | SOLE |
| 420877201 | HAYNUSD | Haynes Intl, Inc. | $3.5M | 0.38% | 76,100 | Common | SOLE |
| 14888U101 | CPRX | Catalyst Pharmaceuticals, Inc. | $3.4M | 0.36% | 293,600 | Common | SOLE |
| 39874R101 | GO | Grocery Outlet Hldg Corp. | $3.3M | 0.36% | 115,900 | Common | SOLE |
| 609027107 | MCRI | Monarch Casino & Resort, Inc. | $3.3M | 0.35% | 53,800 | Common | SOLE |
| 171779309 | CIEN | Ciena Corporation | $3.3M | 0.35% | 70,200 | Common | SOLE |
| 47580P103 | JELD | JELD-WEN Holding, Inc. | $3.3M | 0.35% | 247,400 | Common | SOLE |
| 56400P706 | MNKD | Mannkind Corp. | $3.3M | 0.35% | 798,400 | Common | SOLE |
| 30034T103 | G2C | Everi Hldgs, Inc. | $3.3M | 0.35% | 249,000 | Common | SOLE |
| 31188V100 | FSLY | Fastly, Inc. | $3.3M | 0.35% | 170,300 | Common | SOLE |
| 002121101 | ATEN | A10 Networks, Inc. | $3.2M | 0.34% | 215,000 | Common | SOLE |
| 82489W107 | SHLS | Shoals Technology Group, Inc. | $3.2M | 0.34% | 174,300 | Common | SOLE |
| 03237H101 | AMLX | Amylyx Pharmaceuticals, Inc. | $3.1M | 0.33% | 170,000 | Common | SOLE |
| 525558201 | LMAT | LeMaitre Vascular, Inc. | $3.1M | 0.33% | 57,000 | Common | SOLE |
| 163086101 | CHEF | The Chefs Warehouse, Inc. | $3.1M | 0.33% | 146,400 | Common | SOLE |
| 671044105 | OSIS | Osi Systems, Inc. | $3.0M | 0.32% | 25,400 | Common | SOLE |
| 62955J103 | NOV | NOV, Inc. | $2.9M | 0.31% | 141,000 | Common | SOLE |
| 74167P108 | BCBUSD | Primo Water Corp. | $2.9M | 0.31% | 211,500 | Common | SOLE |
| 691497309 | OXM | Oxford Inds, Inc. | $2.9M | 0.31% | 30,200 | Common | SOLE |
| 806037107 | SCSC | Scansource, Inc. | $2.9M | 0.31% | 95,664 | Common | SOLE |
| 576485205 | MTDR | Matador Resources Company | $2.9M | 0.31% | 48,600 | Common | SOLE |
| 053604104 | AVPT | AvePoint, Inc. | $2.9M | 0.30% | 425,000 | Common | SOLE |
| 205768302 | CRK | Comstock Res | $2.8M | 0.29% | 251,195 | Common | SOLE |
| 53115L104 | LBRT | Liberty Energy, Inc. | $2.8M | 0.29% | 149,400 | Common | SOLE |
| 587376104 | MBWM | Mercantile Bank Corp. | $2.6M | 0.28% | 85,603 | Common | SOLE |
| 09180C106 | BJRI | BJ's Restaurants, Inc. | $2.6M | 0.28% | 112,200 | Common | SOLE |
| 77936F103 | — | Rover Group, Inc. | $2.6M | 0.27% | 408,000 | Common | SOLE |
| 974155103 | WING | Wingstop, Inc. | $2.6M | 0.27% | 14,200 | Common | SOLE |
| 74758T303 | QLYS | Qualys, Inc. | $2.5M | 0.27% | 16,600 | Common | SOLE |
| 722304102 | PDD | PDD Holdings Inc. | $2.5M | 0.26% | 25,000 | Common | SOLE |
| 129500104 | CAL | Caleres Inc. | $2.4M | 0.26% | 84,000 | Common | SOLE |
| 374689107 | ROCK | Gibraltar Inds | $2.4M | 0.26% | 35,700 | Common | SOLE |
| 918284100 | VSEC | VSE Corp. | $2.4M | 0.26% | 47,700 | Common | SOLE |
| 26856L103 | ELF | e.l.f. Beauty, Inc. | $2.4M | 0.25% | 21,800 | Common | SOLE |
| 199908104 | FIX | Comfort Systems USA Inc. | $2.4M | 0.25% | 14,000 | Common | SOLE |
| 336901103 | SRCE | 1st Source Corp. | $2.4M | 0.25% | 55,900 | Common | SOLE |
| 66981J102 | MNSO | MINISO Group Holding Limited | $2.3M | 0.25% | 90,400 | Common | SOLE |
| 04271T100 | ARRY | Array Biopharma | $2.3M | 0.25% | 104,000 | Common | SOLE |
| 626755102 | MUSA | Murphy USA, Inc. | $2.3M | 0.24% | 6,700 | Common | SOLE |
| 559663109 | MGY | Magnolia Oil & Gas Corp. | $2.3M | 0.24% | 99,000 | Common | SOLE |
| 74766Q101 | QTRX | Quanterix Corp. | $2.3M | 0.24% | 83,400 | Common | SOLE |
| 42722X106 | HFWA | Heritage Financial Corporation | $2.2M | 0.24% | 136,000 | Common | SOLE |
| 829073105 | SSD | Simpson Manufacturing | $2.2M | 0.23% | 14,700 | Common | SOLE |
| 383082104 | GRC | The Gorman-Rupp Co. | $2.1M | 0.23% | 65,000 | Common | SOLE |
| 693282105 | PDFS | Pdf Solutions, Inc. | $2.1M | 0.23% | 66,000 | Common | SOLE |
| 580589109 | MGRC | McGrath RentCorp | $2.1M | 0.22% | 21,100 | Common | SOLE |
| 739128106 | POWL | Powell Industries Inc. | $2.1M | 0.22% | 25,400 | Common | SOLE |
| 420261109 | HWKN | Hawkins, Inc. | $2.1M | 0.22% | 35,600 | Common | SOLE |
| 04963C209 | ATRC | Atricure, Inc. | $2.1M | 0.22% | 47,300 | Common | SOLE |
| 938824109 | WAFD | Washington Federal, Inc. | $2.0M | 0.22% | 79,700 | Common | SOLE |
| 320817109 | FRME | First Merchants Corporation | $2.0M | 0.22% | 72,900 | Common | SOLE |
| 294268107 | PLUS | EPlus, Inc. | $2.0M | 0.21% | 31,700 | Common | SOLE |
| 753422104 | RPD | Rapid7, Inc. | $2.0M | 0.21% | 43,900 | Common | SOLE |
| 882681109 | TXRH | Texas Roadhouse | $2.0M | 0.21% | 20,500 | Common | SOLE |
| 453204109 | PI | Impinj, Inc. | $2.0M | 0.21% | 35,700 | Common | SOLE |
| 40637H109 | HALO | Halozyme Therapeutics, Inc. | $1.9M | 0.20% | 50,500 | Common | SOLE |
| 00182C103 | ANIP | ANI Pharmaceuticals, Inc. | $1.9M | 0.20% | 33,000 | Common | SOLE |
| 89531P105 | TREX | Trex Company, Inc. | $1.9M | 0.20% | 30,400 | Common | SOLE |
| 25065K104 | DXLG | Destination XL Group, Inc. | $1.9M | 0.20% | 415,700 | Common | SOLE |
| 046224101 | ASTE | Astec Inds Inc. | $1.9M | 0.20% | 39,400 | Common | SOLE |
| 92835K103 | VPG | Vishay Precision Group | $1.8M | 0.19% | 54,500 | Common | SOLE |
| 91688F104 | UPWK | Upwork, Inc. | $1.6M | 0.17% | 143,400 | Common | SOLE |
| 78462F103 | SPY | SPDR S&P 500 ETF Trust | $1.5M | 0.16% | 3,597 | Common | NONE |
| 50202M102 | LI | Li Auto, Inc. ADR | $1.4M | 0.14% | 38,000 | Common | SOLE |
| 02128L106 | ALTG | Alta Equipment Group, Inc. | $1.3M | 0.14% | 110,100 | Common | SOLE |
| 12763L105 | CDRE | Cadre Hldgs, Inc. | $1.3M | 0.13% | 47,300 | Common | SOLE |
| 52490G102 | LEGN | Legend Biotech Corp. | $1.1M | 0.11% | 16,000 | Common | SOLE |
| 874039100 | TSM | Taiwan Semiconductor | $1.0M | 0.11% | 12,000 | Common | SOLE |
| 359678109 | FLL | Full House Resorts, Inc. | $952,821 | 0.10% | 223,143 | Common | SOLE |
| 032332504 | ASYS | Amtech Systems, Inc. | $906,018 | 0.10% | 118,900 | Common | SOLE |
| 594918104 | MSFT | Microsoft Corp. | $895,151 | 0.10% | 2,835 | Common | NONE |
| 037833100 | AAPL | Apple, Inc. | $833,859 | 0.09% | 4,870 | Common | NONE |
| 126601103 | CVV | CVD Equipment Corp. | $684,971 | 0.07% | 103,000 | Common | SOLE |
| 46625H100 | JPM | JP Morgan Chase & Company Inc. | $580,666 | 0.06% | 4,004 | Common | NONE |
| 478160104 | JNJ | Johnson & Johnson | $394,581 | 0.04% | 2,533 | Common | NONE |
| 89417E109 | TRV | The Travelers Co., Inc. | $358,285 | 0.04% | 2,194 | Common | NONE |
| 031162100 | AMGN | Amgen, Inc. | $328,854 | 0.03% | 1,224 | Common | NONE |
| 57636Q104 | MA | Mastercard, Inc. | $326,744 | 0.03% | 825 | Common | NONE |
| 400501102 | OMAB | Grupo Aeroportuario del Centro | $234,657 | 0.02% | 2,700 | Common | SOLE |
| 580135101 | MCD | McDonald's Corporation | $221,746 | 0.02% | 842 | Common | NONE |
| G0457F107 | ARCO | Arcos Dorados Holdings, Inc. | $219,472 | 0.02% | 23,200 | Common | SOLE |
| 023135106 | AMZN | Amazon.com | $216,104 | 0.02% | 1,700 | Common | NONE |
| 931142103 | WMT | Wal Mart Stores Inc. | $215,823 | 0.02% | 1,349 | Common | NONE |
| 761152107 | RMD | Resmed Inc. | $214,412 | 0.02% | 1,450 | Common | NONE |
| 23344D108 | D0A | Dada Nexus Limited | $101,460 | 0.01% | 22,800 | Common | SOLE |
| 05350B100 | — | Avatar Ventures | $1 | 0.00% | 10,000 | Common | NONE |
| 02906T107 | — | American Power Corp | $0 | — | 10,000 | Common | NONE |
| 888309101 | TNGS | Titan Oil & Gas, Inc. | $0 | — | 10,000 | Common | NONE |
| 98401A106 | — | Xenacare Hldgs, Inc. | $0 | — | 140,000 | Common | NONE |
| 001ESC102 | — | AMR Corp Escrow | $0 | — | 18,000 | Common | SOLE |
Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.