0001213900-21-059091.txt : 20211115 0001213900-21-059091.hdr.sgml : 20211115 20211115113437 ACCESSION NUMBER: 0001213900-21-059091 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20210930 FILED AS OF DATE: 20211115 DATE AS OF CHANGE: 20211115 EFFECTIVENESS DATE: 20211115 FILER: COMPANY DATA: COMPANY CONFORMED NAME: OBERWEIS ASSET MANAGEMENT INC/ CENTRAL INDEX KEY: 0000937886 IRS NUMBER: 364106772 STATE OF INCORPORATION: MA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-04688 FILM NUMBER: 211407706 BUSINESS ADDRESS: STREET 1: 3333 WARRENVILLE ROAD STREET 2: SUITE 500 CITY: LISLE STATE: IL ZIP: 60532 BUSINESS PHONE: 6305772300 MAIL ADDRESS: STREET 1: 3333 WARRENVILLE ROAD STREET 2: SUITE 500 CITY: LISLE STATE: IL ZIP: 60532 13F-HR 1 primary_doc.xml 13F-HR LIVE false false false 0000937886 XXXXXXXX 09-30-2021 09-30-2021 false OBERWEIS ASSET MANAGEMENT INC/

3333 Warrenville Road Suite 500 Lisle IL 60532

13F HOLDINGS REPORT 028-04688 N Patrick B. Joyce 800-323-6166 /s/ Patrick B. Joyce Lisle IL 11-15-2021 0 162 482907 INFORMATION TABLE 2 infotable.xml AMR Corp Escrow com 001ESC102 0 18000 SH SOLE 18000 0 0 Absolute Software Corp. com 00386B109 820 74600 SH SOLE 74600 0 0 Acadia Healthcare Co., Inc. com 00404A109 2787 43695 SH SOLE 26010 0 17685 Adtran, Inc. com 00738A106 818 43600 SH SOLE 43600 0 0 Aehr Test Systems com 00760J108 1574 115300 SH SOLE 115300 0 0 Alibaba Group Holding Ltd ADR com 01609W102 221 1490 SH SOLE 130 0 1360 Allied Motion Technologies com 019330109 1067 34100 SH SOLE 34100 0 0 Alpha & Omega Semiconductor com G6331P104 2321 74000 SH SOLE 74000 0 0 Alphabet, Inc. Cl C com 02079k107 267 100 SH SOLE 0 0 100 Alphatec Hldgs Inc. com 02081G201 7071 580030 SH SOLE 456820 0 123210 Amazon.com com 023135106 329 100 SH SOLE 0 0 100 Ameresco, Inc. com 02361E108 2180 37308 SH SOLE 37308 0 0 American Power Corp com 02906T107 0 10000 SH SOLE 0 0 10000 Amgen, Inc. com 031162100 318 1497 SH SOLE 0 0 1497 Amphastar Pharmaceuticals, Inc com 03209R103 202 10600 SH SOLE 10600 0 0 Amtech Systems, Inc. com 032332504 772 67500 SH SOLE 67500 0 0 Angiodynamics, Inc. com 03475v101 2760 106400 SH SOLE 106400 0 0 Antares Pharma, Inc. com 036642106 822 225900 SH SOLE 225900 0 0 Apple, Inc. com 037833100 1055 7455 SH SOLE 240 0 7215 Arconic Corporation com 03966V107 1905 60400 SH SOLE 38050 0 22350 Avatar Ventures com 05350B100 0 10000 SH SOLE 0 0 10000 Aviat Networks, Inc. com 05366Y201 2682 81607 SH SOLE 81607 0 0 Avid Technology, Inc. com 05367P100 570 19700 SH SOLE 19700 0 0 Axcelis Technologies com 054540208 7237 153870 SH SOLE 129980 0 23890 BJs Wholesale Club Holdings, I com 05550J101 1213 22080 SH SOLE 6310 0 15770 BRP Group, Inc. com 05589G102 213 6400 SH SOLE 6400 0 0 Beacon Roofing Supply com 073685109 272 5700 SH SOLE 5700 0 0 Belden, Inc. com 077454106 361 6200 SH SOLE 6200 0 0 Boot Barn Hldgs, Inc. com 099406100 2871 32300 SH SOLE 32300 0 0 Builders Firstsource com 12008R107 2539 49080 SH SOLE 29810 0 19270 CTS Corp. com 126501105 1428 46200 SH SOLE 46200 0 0 Cadence Design System, Inc. com 127387108 5134 33900 SH SOLE 33900 0 0 Camtek, Ltd. com M20791105 1660 40980 SH SOLE 40980 0 0 CarGurus, Inc. com 141788109 468 14900 SH SOLE 11300 0 3600 CareDx, Inc. com 14167L103 3032 47850 SH SOLE 32570 0 15280 Castle Biosciences, Inc. com 14843C105 1746 26260 SH SOLE 26260 0 0 Central Garden & Pet Co. com 153527106 235 4900 SH SOLE 4900 0 0 Cerus Corp. com 157085101 871 143100 SH SOLE 143100 0 0 ChannelAdvisor Corporation com 159179100 9838 389930 SH SOLE 295660 0 94270 Clean Harbors, Inc. com 184496107 301 2900 SH SOLE 2900 0 0 Clearfield, Inc. com 18482P103 1982 44900 SH SOLE 44900 0 0 Cohu, Inc. com 192576106 913 28576 SH SOLE 28576 0 0 Commercial Vehicle Group com 202608105 1471 155500 SH SOLE 155500 0 0 Commvault Systems, Inc. com 204166102 286 3800 SH SOLE 3800 0 0 Constellium NV Cl A com F21107101 122023 6497497 SH SOLE 4840339 0 1657158 Crocs, Inc. com 227046109 6883 47970 SH SOLE 40840 0 7130 Cross Country Healthcare, Inc. com 227483104 1655 77900 SH SOLE 77900 0 0 Cyberoptics Corp. com 232517102 861 24200 SH SOLE 24200 0 0 DZS, Inc. com 268211109 1187 96800 SH SOLE 96800 0 0 Dada Nexus Limited com 23344D108 347 17300 SH SOLE 17300 0 0 Deckers Outdoor Corp. com 243537107 6927 19230 SH SOLE 13680 0 5550 Dynavax Technologies Corp. com 268158201 1114 58000 SH SOLE 58000 0 0 El Pollo Loco Hldgs, Inc. com 268603107 938 55500 SH SOLE 55500 0 0 Employers Holdings, Inc. com 292218104 869 22000 SH SOLE 22000 0 0 EnPro Industries, Inc. com 29355x107 1237 14200 SH SOLE 14200 0 0 Endava Plc Ads com 29260V105 80426 592021 SH SOLE 443872 0 148149 Entravision Communications com 29382r107 1962 276400 SH SOLE 276400 0 0 Everi Hldgs, Inc. com 30034T103 1531 63300 SH SOLE 63300 0 0 Extreme Networks, Inc. com 30226D106 1219 123800 SH SOLE 123800 0 0 First Foundation Inc. com 32026V104 881 33500 SH SOLE 33500 0 0 Flexsteel Inds, Inc. com 339382103 926 30000 SH SOLE 30000 0 0 Full House Resorts, Inc. com 359678109 1618 152543 SH SOLE 152543 0 0 Global-e Online Ltd. com M5216V106 7711 107400 SH SOLE 107400 0 0 Golden Nugget Online Gaming, I com 38113L107 521 30000 SH SOLE 30000 0 0 Guess, Inc com 401617105 5365 255367 SH SOLE 216666 0 38701 Hackett Group, Inc. com 404609109 1050 53500 SH SOLE 53500 0 0 Halozyme Therapeutics, Inc. com 40637H109 2847 69980 SH SOLE 46310 0 23670 Headhunter Group Plc Spon ADR com 42207L106 332 6800 SH SOLE 6800 0 0 Healthstream Inc. com 42222N103 1309 45800 SH SOLE 45800 0 0 Heidrick & Struggles com 422819102 1553 34800 SH SOLE 34800 0 0 Helmerich & Payne com 423452101 773 28195 SH SOLE 9560 0 18635 Heska Corp Com Restrc New com 42805E306 259 1000 SH SOLE 1000 0 0 Hooker Furniture Corp com 439038100 769 28500 SH SOLE 28500 0 0 Houghton Mifflin Harcourt Comp com 44157R109 1021 76000 SH SOLE 76000 0 0 ICF International, Inc. com 44925C103 1393 15600 SH SOLE 15600 0 0 II-VI Inc. com 902104108 404 6800 SH SOLE 0 0 6800 Information Svcs Group, Inc. com 45675Y104 1687 235000 SH SOLE 235000 0 0 Inmode Ltd. com M5425M103 6392 40090 SH SOLE 27780 0 12310 Inotiv, Inc. com 45783Q100 1187 40600 SH SOLE 40600 0 0 Intel Corporation com 458140100 295 5540 SH SOLE 0 0 5540 Inter Parfums com 458334109 307 4100 SH SOLE 4100 0 0 JP Morgan Chase & Company Inc. com 46625H100 700 4275 SH SOLE 140 0 4135 Johnson & Johnson com 478160104 448 2772 SH SOLE 0 0 2772 Johnson Outdoors, Inc. com 479167108 1492 14100 SH SOLE 14100 0 0 KForce, Inc. com 493732101 1044 17500 SH SOLE 17500 0 0 Kennametal, Inc. com 489170100 308 9000 SH SOLE 9000 0 0 Korn Ferry com 500643200 347 4800 SH SOLE 4800 0 0 Lands' End, Inc. com 51509F105 1288 54700 SH SOLE 54700 0 0 Lifetime Brands, Inc. com 53222q103 1099 60400 SH SOLE 60400 0 0 M/I Homes, Inc. com 55305B101 1786 30900 SH SOLE 30900 0 0 Macom Technology Solutions com 55405Y100 240 3700 SH SOLE 3700 0 0 Magnolia Oil & Gas Corp. com 559663109 213 12000 SH SOLE 12000 0 0 Malibu Boats, Inc. com 56117J100 3831 54750 SH SOLE 40220 0 14530 Masonite Intl Corp. com 575385109 2327 21925 SH SOLE 17080 0 4845 Mastercard, Inc. com 57636Q104 450 1294 SH SOLE 0 0 1294 Materion Corp. com 576690101 268 3900 SH SOLE 3900 0 0 Maxlinear, Inc. Class A com 57776J100 1684 34200 SH SOLE 10350 0 23850 McDonald's Corporation com 580135101 201 833 SH SOLE 0 0 833 Mercantile Bank Corp. com 587376104 1276 39828 SH SOLE 21900 0 17928 Microsoft Corp. com 594918104 861 3055 SH SOLE 0 0 3055 Model N, Inc. com 607525102 3020 90140 SH SOLE 66210 0 23930 Monarch Casino & Resort, Inc. com 609027107 1507 22500 SH SOLE 22500 0 0 Movado Group, Inc. com 624580106 1518 48200 SH SOLE 48200 0 0 NOV, Inc. com 62955J103 176 13400 SH SOLE 13400 0 0 Newmont Mining com 651639106 336 6192 SH SOLE 400 0 5792 OOMA Inc. com 683416101 917 49300 SH SOLE 49300 0 0 Option Care Health Inc. com 68404L201 235 9700 SH SOLE 9700 0 0 Organogenesis Hlgs, Inc. com 68621F102 7249 509058 SH SOLE 401008 0 108050 PDC Energy, Inc. com 69327R101 209 4400 SH SOLE 4400 0 0 Patrick Industries, Inc. com 703343103 1133 13600 SH SOLE 13600 0 0 Patterson-Uti Energy, Inc. com 703481101 1127 125200 SH SOLE 125200 0 0 Perficient Inc. com 71375U101 1169 10100 SH SOLE 10100 0 0 Preformed Line Prods Co. com 740444104 455 7000 SH SOLE 7000 0 0 RF Industries Ltd. com 749552105 530 65000 SH SOLE 65000 0 0 RPC, Inc. com 749660106 920 189400 SH SOLE 189400 0 0 Radnet, Inc. com 750491102 1571 53600 SH SOLE 53600 0 0 Rapid7, Inc. com 753422104 1798 15910 SH SOLE 4650 0 11260 Realogy Hldgs Corp. com 75605Y106 288 16400 SH SOLE 16400 0 0 Red Robin Gourmet Burger com 75689M101 2601 112800 SH SOLE 112800 0 0 Resmed Inc. com 761152107 382 1450 SH SOLE 0 0 1450 Resources Connection, Inc. com 76122q105 1592 100900 SH SOLE 100900 0 0 Revolve Group, Inc. com 76156B107 303 4900 SH SOLE 4900 0 0 SP Plus Corporation com 78469C103 1034 33700 SH SOLE 33700 0 0 Scansource, Inc. com 806037107 1218 35000 SH SOLE 35000 0 0 Sea Ltd com 81141R100 29196 91600 SH SOLE 91600 0 0 SeaWorld Entertainment Inc. com 81282v100 1635 29560 SH SOLE 10320 0 19240 Select Medical Hldgs. Corp com 81619Q105 293 8100 SH SOLE 8100 0 0 Shopify, Inc. com 82509L107 7240 5340 SH SOLE 5340 0 0 Shutterstock, Inc. com 825690100 8422 74323 SH SOLE 49003 0 25320 Shyft Group, Inc. com 825698103 1041 27400 SH SOLE 27400 0 0 Skyline Champion Corporation com 830830105 336 5600 SH SOLE 5600 0 0 Smart Global Hldgs, Inc. com G8232Y101 1353 30400 SH SOLE 30400 0 0 Sterling Construction Co., Inc com 859241101 1480 65300 SH SOLE 65300 0 0 Stewart Information Services com 860372101 278 4400 SH SOLE 4400 0 0 Strattec Security Corp. com 863111100 626 16100 SH SOLE 16100 0 0 Stride, Inc. com 86333M108 284 7900 SH SOLE 7900 0 0 Summit Materials, Inc. com 86614U100 297 9300 SH SOLE 9300 0 0 Superior Industries Intl. Inc. com 868168105 1075 152498 SH SOLE 152498 0 0 Synaptics, Inc. com 87157D109 10266 57120 SH SOLE 44840 0 12280 TTEC Hldgs, Inc. com 89854H102 253 2700 SH SOLE 2700 0 0 Techtarget, Inc. com 87874R100 231 2800 SH SOLE 2800 0 0 Tempur Sealy International, In com 88023U101 1800 38777 SH SOLE 38507 0 270 Teradata Corp com 88076W103 379 6600 SH SOLE 6600 0 0 The Travelers Co., Inc. com 89417E109 361 2376 SH SOLE 0 0 2376 Titan Machinery, Inc. com 88830R101 889 34300 SH SOLE 34300 0 0 Titan Oil & Gas, Inc. com 888309101 0 10000 SH SOLE 0 0 10000 Travelzoo com 89421Q205 661 57000 SH SOLE 57000 0 0 Trex Company, Inc. com 89531P105 904 8870 SH SOLE 1080 0 7790 TrueBlue, Inc. com 89785X101 1145 42300 SH SOLE 42300 0 0 Tupperware Corp. com 899896104 771 36490 SH SOLE 36490 0 0 UFP Industries, Inc. com 90278Q108 231 3400 SH SOLE 3400 0 0 Ultra Clean Holdings com 90385V107 3812 89480 SH SOLE 86370 0 3110 Upwork, Inc. com 91688F104 1451 32220 SH SOLE 22000 0 10220 Varex Imaging Corp. com 92214X106 1613 57200 SH SOLE 57200 0 0 Veritiv Corp. com 923454102 3692 41222 SH SOLE 41222 0 0 Verizon Communications com 92343V104 240 4451 SH SOLE 0 0 4451 Vishay Precision Group com 92835K103 1314 37800 SH SOLE 37800 0 0 Vocera Communications, Inc. com 92857F107 1978 43226 SH SOLE 43226 0 0 Wal Mart Stores Inc. com 931142103 239 1711 SH SOLE 0 0 1711 Xenacare Hldgs, Inc. com 98401A106 0 140000 SH SOLE 0 0 140000 Zumiez Inc. com 989817101 2040 51300 SH SOLE 51300 0 0 SPDR S&P 500 ETF Trust com 78462F103 1539 3587 SH SOLE 0 0 3587