Q2 2023 · 13F-HR
OBERWEIS ASSET MANAGEMENT INC/holdings as filed
Filed 2023-08-14 · accession 0001213900-23-066668
$822.8M
Reported value
187
Positions
2023-06-30
Period end
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| F21107101 | CSTM | Constellium NV Cl A | $48.1M | 5.85% | 2,799,271 | Common | SOLE |
| 054540208 | ACLS | Axcelis Technologies | $44.1M | 5.36% | 240,399 | Common | SOLE |
| 00760J108 | AEHR | Aehr Test Systems | $36.0M | 4.38% | 873,108 | Common | SOLE |
| 02081G201 | ATEC | Alphatec Hldgs Inc. | $17.6M | 2.14% | 980,470 | Common | SOLE |
| 453204109 | PI | Impinj, Inc. | $16.1M | 1.95% | 179,145 | Common | SOLE |
| 516544103 | LNTH | Lantheus Hldgs Inc. | $13.9M | 1.69% | 166,180 | Common | SOLE |
| M78673114 | PERI | Perion Network, Ltd. | $13.1M | 1.59% | 426,250 | Common | SOLE |
| 92337F107 | VCYT | Veracyte, Inc. | $12.3M | 1.49% | 482,310 | Common | SOLE |
| 243537107 | DECK | Deckers Outdoor Corp. | $12.2M | 1.48% | 23,120 | Common | SOLE |
| 227046109 | CROX | Crocs, Inc. | $11.9M | 1.44% | 105,500 | Common | SOLE |
| 89377M109 | TMDX | TransMedics Group, Inc. | $10.7M | 1.30% | 127,000 | Common | SOLE |
| 44925C103 | ICFI | ICF International, Inc. | $10.0M | 1.21% | 80,200 | Common | SOLE |
| 077454106 | BDC | Belden, Inc. | $9.4M | 1.15% | 98,755 | Common | SOLE |
| 923454102 | — | Veritiv Corp. | $9.1M | 1.11% | 72,790 | Common | SOLE |
| 01749D105 | ALGM | Allegro MicroSystems, Inc. | $8.8M | 1.08% | 196,040 | Common | SOLE |
| 30226D106 | EXTR | Extreme Networks, Inc. | $8.8M | 1.07% | 337,900 | Common | SOLE |
| 03209R103 | AMPH | Amphastar Pharmaceuticals, Inc | $8.5M | 1.03% | 147,800 | Common | SOLE |
| 184496107 | CLH | Clean Harbors, Inc. | $7.4M | 0.90% | 45,105 | Common | SOLE |
| 87357P100 | TCMD | Tactile Sys Technology, Inc. | $7.4M | 0.89% | 294,950 | Common | SOLE |
| 077347300 | BELFB | Bel Fuse, Inc. | $7.0M | 0.85% | 121,500 | Common | SOLE |
| 30050B101 | EVH | Evolent Health, Inc. | $6.9M | 0.84% | 227,910 | Common | SOLE |
| 607525102 | MODNEUR | Model N, Inc. | $6.9M | 0.84% | 194,818 | Common | SOLE |
| 92839U206 | VC | Visteon Corp. | $6.9M | 0.83% | 47,760 | Common | SOLE |
| 095306106 | BLBD | Blue Bird Corporation | $6.8M | 0.82% | 301,300 | Common | SOLE |
| 63942X106 | NVTS | Navitas Semiconductor Corp. | $6.7M | 0.82% | 640,000 | Common | SOLE |
| 90385V107 | UCTT | Ultra Clean Holdings | $6.6M | 0.80% | 170,900 | Common | SOLE |
| 739276103 | POWI | Power Integrations | $6.6M | 0.80% | 69,270 | Common | SOLE |
| 589889104 | MMSI | Merit Medical System Inc | $6.5M | 0.79% | 78,160 | Common | SOLE |
| 89455T109 | TMCI | Treace Medical Concepts, Inc. | $6.4M | 0.78% | 251,500 | Common | SOLE |
| 05465P101 | AXNX* | Axonics, Inc. | $6.3M | 0.77% | 125,440 | Common | SOLE |
| 68287N100 | OSPN | OneSpan, Inc. | $6.2M | 0.75% | 416,845 | Common | SOLE |
| 000899104 | ADMA | ADMA Biologics, Inc. | $6.2M | 0.75% | 1,668,700 | Common | SOLE |
| 92537N108 | VRT | Vertiv Holdings Co. | $6.2M | 0.75% | 248,340 | Common | SOLE |
| 859241101 | STRL | Sterling Construction Co., Inc | $6.0M | 0.72% | 106,700 | Common | SOLE |
| 825704109 | SIBN | SI-BONE, Inc. | $5.9M | 0.72% | 220,200 | Common | SOLE |
| 81282v100 | — | SeaWorld Entertainment Inc. | $5.6M | 0.68% | 99,600 | Common | SOLE |
| 17273K109 | — | CIRCOR International, Inc. | $5.4M | 0.65% | 95,000 | Common | SOLE |
| N70544106 | PL0 | Playa Hotels & Resorts N.V. | $5.3M | 0.65% | 655,300 | Common | SOLE |
| 29261A100 | EHC | Encompass Health Corporation | $5.3M | 0.64% | 78,100 | Common | SOLE |
| M20791105 | CAMT | Camtek, Ltd. | $5.3M | 0.64% | 148,202 | Common | SOLE |
| 125141101 | CECO | CECO Environmental Corp. | $5.2M | 0.64% | 392,600 | Common | SOLE |
| G48833118 | WFRD | Weatherford International PLC | $5.2M | 0.63% | 78,580 | Common | SOLE |
| 922417100 | VECO | Veeco Instruments, Inc. | $5.2M | 0.63% | 202,500 | Common | SOLE |
| M5425M103 | INMD | Inmode Ltd. | $5.1M | 0.62% | 137,100 | Common | SOLE |
| 163086101 | CHEF | The Chefs Warehouse, Inc. | $5.1M | 0.61% | 141,500 | Common | SOLE |
| 171779309 | CIEN | Ciena Corporation | $5.0M | 0.61% | 118,305 | Common | SOLE |
| 719405102 | PLAB | Photronics, Inc. | $5.0M | 0.61% | 194,700 | Common | SOLE |
| 346375108 | FORM | Formfactor Inc. | $4.9M | 0.59% | 143,000 | Common | SOLE |
| 92242T101 | VVX | V2X, Inc. | $4.8M | 0.59% | 97,800 | Common | SOLE |
| 866683105 | SNCY | Sun Country Airlines Holdings, | $4.8M | 0.58% | 213,200 | Common | SOLE |
| 55303J106 | MGPI | MGP Ingredients, Inc. | $4.8M | 0.58% | 44,850 | Common | SOLE |
| 413160102 | HLIT | Harmonic, Inc. | $4.8M | 0.58% | 294,300 | Common | SOLE |
| 253798102 | DGII | Digi International I | $4.8M | 0.58% | 120,600 | Common | SOLE |
| 313855108 | FSS | Federal Signal Corp. | $4.7M | 0.58% | 73,900 | Common | SOLE |
| 01741R102 | ATI | ATI, Inc. | $4.7M | 0.57% | 106,800 | Common | SOLE |
| 749660106 | RES | RPC, Inc. | $4.7M | 0.57% | 657,033 | Common | SOLE |
| 55955D100 | MGNI | Magnite, Inc. | $4.7M | 0.57% | 340,700 | Common | SOLE |
| 428291108 | HXL | Hexcel Corporation | $4.5M | 0.55% | 59,000 | Common | SOLE |
| 78469C103 | SPUSD | SP Plus Corporation | $4.4M | 0.54% | 113,700 | Common | SOLE |
| 34354P105 | FLS | Flowserve Corporation | $4.4M | 0.54% | 119,200 | Common | SOLE |
| 537008104 | LFUS | Littelfuse, Inc. | $4.4M | 0.54% | 15,200 | Common | SOLE |
| 980745103 | WWD | Woodward, Inc. | $4.4M | 0.54% | 37,100 | Common | SOLE |
| 94724R108 | WEAV | Weave Communications, Inc. | $4.4M | 0.53% | 394,500 | Common | SOLE |
| 387328107 | GVA | Granite Construction | $4.4M | 0.53% | 110,100 | Common | SOLE |
| 01973R101 | ALSN | Allison Transmission Holdings, | $4.4M | 0.53% | 77,400 | Common | SOLE |
| 70202L102 | PSN | Parsons Corp. | $4.4M | 0.53% | 90,400 | Common | SOLE |
| 302301106 | EZPW | EZCorp, Inc. | $4.2M | 0.52% | 506,200 | Common | SOLE |
| 353514102 | FELE | Franklin Electric | $4.2M | 0.51% | 40,900 | Common | SOLE |
| 127055101 | CBT | Cabot Corp. | $4.2M | 0.51% | 62,405 | Common | SOLE |
| 127387108 | CDNS | Cadence Design System, Inc. | $4.1M | 0.50% | 17,600 | Common | SOLE |
| 458334109 | IPAR | Inter Parfums | $4.1M | 0.50% | 30,400 | Common | SOLE |
| 00404A109 | ACHC | Acadia Healthcare Co., Inc. | $4.1M | 0.50% | 51,400 | Common | SOLE |
| 747316107 | KWR | Quaker Chemical Corporation | $4.1M | 0.49% | 20,800 | Common | SOLE |
| 98956A105 | ZETA | Zeta Global Holdings Corp. | $4.1M | 0.49% | 474,500 | Common | SOLE |
| 405024100 | HAE | Haemonetics Corp. | $4.0M | 0.49% | 47,500 | Common | SOLE |
| 577933104 | MMS | Maximus, Inc. | $4.0M | 0.49% | 47,800 | Common | SOLE |
| 826919102 | SLAB | Silicon Laboratories, Inc. | $4.0M | 0.49% | 25,510 | Common | SOLE |
| 01748X102 | ALGT | Allegiant Travel Co. | $3.8M | 0.47% | 30,400 | Common | SOLE |
| 607828100 | MOD | Modine Mfg Co Com | $3.8M | 0.46% | 115,000 | Common | SOLE |
| 404030108 | HEESEUR | H&E Equipment Services, Inc. | $3.8M | 0.46% | 82,100 | Common | SOLE |
| 35905A109 | FTDR | Frontdoor, Inc. | $3.8M | 0.46% | 117,700 | Common | SOLE |
| 33768G107 | FCFS | FirstCash Holdings, Inc | $3.7M | 0.45% | 40,100 | Common | SOLE |
| 00108J109 | ACMR | ACM Research, Inc. Class A | $3.7M | 0.45% | 285,600 | Common | SOLE |
| 420877201 | HAYNUSD | Haynes Intl, Inc. | $3.7M | 0.45% | 72,600 | Common | SOLE |
| 05366Y201 | AVNW | Aviat Networks, Inc. | $3.7M | 0.44% | 109,507 | Common | SOLE |
| 55405Y100 | MTSI | Macom Technology Solutions | $3.7M | 0.44% | 55,700 | Common | SOLE |
| 228903100 | AORT | Artivion, Inc | $3.6M | 0.44% | 211,300 | Common | SOLE |
| 68404L201 | OPCH | Option Care Health Inc. | $3.6M | 0.44% | 111,000 | Common | SOLE |
| 8676EP108 | STKL | SunOpta, Inc. | $3.6M | 0.44% | 537,700 | Common | SOLE |
| 67098H104 | OI | O-I Glass, Inc. | $3.6M | 0.44% | 168,100 | Common | SOLE |
| 82489W107 | SHLS | Shoals Technology Group, Inc. | $3.6M | 0.43% | 139,600 | Common | SOLE |
| 50216C108 | LYTS | LSI Industries Inc. | $3.6M | 0.43% | 283,700 | Common | SOLE |
| 292218104 | EIG | Employers Holdings, Inc. | $3.6M | 0.43% | 95,100 | Common | SOLE |
| 47580P103 | JELD | JELD-WEN Holding, Inc. | $3.5M | 0.43% | 201,900 | Common | SOLE |
| 03820c105 | — | Applied Industrial | $3.5M | 0.43% | 24,400 | Common | SOLE |
| 78473E103 | SPXC | SPX Technologies, Inc. | $3.5M | 0.43% | 41,500 | Common | SOLE |
| 55305B101 | MHO | M/I Homes, Inc. | $3.5M | 0.43% | 40,400 | Common | SOLE |
| 64049M209 | NEO | NeoGenomics, Inc. | $3.4M | 0.42% | 213,000 | Common | SOLE |
| 01626W101 | ALIT | Alight, Inc. | $3.3M | 0.41% | 361,300 | Common | SOLE |
| 30034T103 | G2C | Everi Hldgs, Inc. | $3.3M | 0.40% | 229,200 | Common | SOLE |
| 86800U104 | SMCIUSD | Super Micro Computer Inc. | $3.3M | 0.40% | 13,100 | Common | SOLE |
| 099406100 | BOOT | Boot Barn Hldgs, Inc. | $3.2M | 0.39% | 37,800 | Common | SOLE |
| 27032D304 | — | Earthstone Energy Inc. | $3.2M | 0.39% | 223,000 | Common | SOLE |
| 609027107 | MCRI | Monarch Casino & Resort, Inc. | $3.2M | 0.39% | 45,200 | Common | SOLE |
| 268158201 | DVAX | Dynavax Technologies Corp. | $3.2M | 0.39% | 245,400 | Common | SOLE |
| 740367404 | PFBC | Preferred Bank | $3.1M | 0.38% | 57,000 | Common | SOLE |
| 002121101 | ATEN | A10 Networks, Inc. | $3.0M | 0.37% | 208,600 | Common | SOLE |
| 91529Y106 | UNM | UNUM Group | $3.0M | 0.36% | 62,600 | Common | SOLE |
| 64829B100 | — | New Relic, Inc. | $3.0M | 0.36% | 45,300 | Common | SOLE |
| 000957100 | ABM | ABM Industries, Inc. | $2.9M | 0.36% | 68,500 | Common | SOLE |
| Y41053102 | INSW | International Seaways, Inc. | $2.9M | 0.35% | 74,800 | Common | SOLE |
| 69327R101 | — | PDC Energy, Inc. | $2.8M | 0.34% | 39,604 | Common | SOLE |
| 691497309 | OXM | Oxford Inds, Inc. | $2.7M | 0.33% | 27,600 | Common | SOLE |
| 703481101 | PTEN | Patterson-Uti Energy, Inc. | $2.7M | 0.33% | 226,500 | Common | SOLE |
| 46005L101 | IMXI | International Money Express, I | $2.7M | 0.32% | 108,300 | Common | SOLE |
| 918284100 | VSEC | VSE Corp. | $2.6M | 0.32% | 47,700 | Common | SOLE |
| 82489T104 | SWAVUSD | ShockWave Medical, Inc. | $2.6M | 0.31% | 9,050 | Common | SOLE |
| 02156B103 | AYXEUR | Alteryx, Inc. Com Cl A | $2.6M | 0.31% | 56,350 | Common | SOLE |
| 457730109 | INSP | Inspire Medical Systems, Inc. | $2.5M | 0.30% | 7,650 | Common | SOLE |
| 14888U101 | CPRX | Catalyst Pharmaceuticals, Inc. | $2.5M | 0.30% | 183,400 | Common | SOLE |
| 693282105 | PDFS | Pdf Solutions, Inc. | $2.5M | 0.30% | 54,500 | Common | SOLE |
| 47103N106 | JBI | Janus International Group, Inc | $2.4M | 0.29% | 224,700 | Common | SOLE |
| 205768302 | CRK | Comstock Res | $2.4M | 0.29% | 206,463 | Common | SOLE |
| 019330109 | ALNT | Allied Motion Technologies | $2.3M | 0.27% | 56,600 | Common | SOLE |
| 55345K103 | 37M | MRC Global, Inc. | $2.2M | 0.27% | 223,400 | Common | SOLE |
| 45778Q107 | NSP | Insperity, Inc. | $2.1M | 0.26% | 18,000 | Common | SOLE |
| 525558201 | LMAT | LeMaitre Vascular, Inc. | $2.1M | 0.26% | 31,600 | Common | SOLE |
| 630402105 | NSSC | Napco Sec Technologies, Inc. | $2.1M | 0.25% | 59,300 | Common | SOLE |
| 42722X106 | HFWA | Heritage Financial Corporation | $2.0M | 0.25% | 126,500 | Common | SOLE |
| 25065K104 | DXLG | Destination XL Group, Inc. | $2.0M | 0.25% | 415,700 | Common | SOLE |
| 92835K103 | VPG | Vishay Precision Group | $2.0M | 0.25% | 54,500 | Common | SOLE |
| 576485205 | MTDR | Matador Resources Company | $2.0M | 0.24% | 38,300 | Common | SOLE |
| 67000B104 | NOVT | Novanta, Inc. | $2.0M | 0.24% | 10,600 | Common | SOLE |
| 02128L106 | ALTG | Alta Equipment Group, Inc. | $1.9M | 0.23% | 110,100 | Common | SOLE |
| 882681109 | TXRH | Texas Roadhouse | $1.9M | 0.23% | 16,700 | Common | SOLE |
| 03237H101 | AMLX | Amylyx Pharmaceuticals, Inc. | $1.8M | 0.22% | 85,000 | Common | SOLE |
| 64082B102 | NRDS | NerdWallet, Inc. | $1.8M | 0.21% | 187,700 | Common | SOLE |
| 829073105 | SSD | Simpson Manufacturing | $1.7M | 0.21% | 12,600 | Common | SOLE |
| 587376104 | MBWM | Mercantile Bank Corp. | $1.7M | 0.21% | 62,789 | Common | SOLE |
| 199908104 | FIX | Comfort Systems USA Inc. | $1.7M | 0.21% | 10,500 | Common | SOLE |
| 806037107 | SCSC | Scansource, Inc. | $1.7M | 0.21% | 58,200 | Common | SOLE |
| 66981J102 | MNSO | MINISO Group Holding Limited | $1.6M | 0.20% | 96,800 | Common | SOLE |
| 559663109 | MGY | Magnolia Oil & Gas Corp. | $1.6M | 0.20% | 77,400 | Common | SOLE |
| 129500104 | CAL | Caleres Inc. | $1.6M | 0.19% | 66,900 | Common | SOLE |
| 78462F103 | SPY | SPDR S&P 500 ETF Trust | $1.6M | 0.19% | 3,597 | Common | NONE |
| 11373M107 | BB3 | Brookline Bancorp, Inc. | $1.6M | 0.19% | 180,000 | Common | SOLE |
| 320817109 | FRME | First Merchants Corporation | $1.5M | 0.19% | 54,800 | Common | SOLE |
| 938824109 | WAFD | Washington Federal, Inc. | $1.5M | 0.19% | 58,200 | Common | SOLE |
| 974155103 | WING | Wingstop, Inc. | $1.5M | 0.18% | 7,600 | Common | SOLE |
| 62955J103 | NOV | NOV, Inc. | $1.5M | 0.18% | 94,500 | Common | SOLE |
| 359678109 | FLL | Full House Resorts, Inc. | $1.5M | 0.18% | 223,143 | Common | SOLE |
| 626755102 | MUSA | Murphy USA, Inc. | $1.5M | 0.18% | 4,800 | Common | SOLE |
| 53115L104 | LBRT | Liberty Energy, Inc. | $1.5M | 0.18% | 109,900 | Common | SOLE |
| 50202M102 | LI | Li Auto, Inc. ADR | $1.2M | 0.14% | 33,000 | Common | SOLE |
| 032332504 | ASYS | Amtech Systems, Inc. | $1.1M | 0.14% | 118,900 | Common | SOLE |
| 722304102 | PDD | PDD Holdings Inc. | $1.1M | 0.13% | 16,000 | Common | SOLE |
| 874039100 | TSM | Taiwan Semiconductor | $1.1M | 0.13% | 10,500 | Common | SOLE |
| 037833100 | AAPL | Apple, Inc. | $1.1M | 0.13% | 5,450 | Common | NONE |
| 594918104 | MSFT | Microsoft Corp. | $1.0M | 0.13% | 3,055 | Common | NONE |
| 57776J100 | MXL | Maxlinear, Inc. Class A | $994,298 | 0.12% | 31,505 | Common | NONE |
| 88034P109 | TME | Tencent Music Entertainment | $922,500 | 0.11% | 125,000 | Common | SOLE |
| 65441V101 | NINEQ | Nine Energy Service, Inc. | $903,114 | 0.11% | 235,800 | Common | SOLE |
| 482738101 | KVHI | KVH Industries, Inc. | $831,740 | 0.10% | 91,000 | Common | SOLE |
| 52490G102 | LEGN | Legend Biotech Corp. | $828,360 | 0.10% | 12,000 | Common | SOLE |
| 126601103 | CVV | CVD Equipment Corp. | $759,110 | 0.09% | 103,000 | Common | SOLE |
| 46625H100 | JPM | JP Morgan Chase & Company Inc. | $595,518 | 0.07% | 4,095 | Common | NONE |
| 478160104 | JNJ | Johnson & Johnson | $448,676 | 0.05% | 2,711 | Common | NONE |
| 89417E109 | TRV | The Travelers Co., Inc. | $394,446 | 0.05% | 2,271 | Common | NONE |
| 57636Q104 | MA | Mastercard, Inc. | $371,727 | 0.05% | 945 | Common | NONE |
| 761152107 | RMD | Resmed Inc. | $316,825 | 0.04% | 1,450 | Common | NONE |
| 031162100 | AMGN | Amgen, Inc. | $306,992 | 0.04% | 1,383 | Common | NONE |
| 532457108 | LLY | Eli Lilly & Company | $285,643 | 0.03% | 609 | Common | NONE |
| 749552105 | RFIL | RF Industries Ltd. | $261,865 | 0.03% | 63,100 | Common | SOLE |
| 023135106 | AMZN | Amazon.com | $260,720 | 0.03% | 2,000 | Common | NONE |
| 580135101 | MCD | McDonald's Corporation | $250,850 | 0.03% | 841 | Common | NONE |
| 931142103 | WMT | Wal Mart Stores Inc. | $249,690 | 0.03% | 1,589 | Common | NONE |
| G0457F107 | ARCO | Arcos Dorados Holdings, Inc. | $237,800 | 0.03% | 23,200 | Common | SOLE |
| 400501102 | OMAB | Grupo Aeroportuario del Centro | $229,068 | 0.03% | 2,700 | Common | SOLE |
| 651639106 | NEM | Newmont Mining | $218,660 | 0.03% | 5,126 | Common | NONE |
| 713448108 | PEP | Pepsico, Inc. | $202,816 | 0.02% | 1,095 | Common | NONE |
| 21240E105 | VLRS | Controladora Vuela Comp de Avi | $167,400 | 0.02% | 12,000 | Common | SOLE |
| 23344D108 | D0A | Dada Nexus Limited | $121,068 | 0.01% | 22,800 | Common | SOLE |
| 001ESC102 | — | AMR Corp Escrow | $0 | — | 18,000 | Common | SOLE |
| 02906T107 | — | American Power Corp | $0 | — | 10,000 | Common | NONE |
| 05350B100 | — | Avatar Ventures | $0 | — | 10,000 | Common | NONE |
| 98401A106 | — | Xenacare Hldgs, Inc. | $0 | — | 140,000 | Common | NONE |
| 888309101 | TNGS | Titan Oil & Gas, Inc. | $0 | — | 10,000 | Common | NONE |
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.