0001213900-22-026835.txt : 20220516 0001213900-22-026835.hdr.sgml : 20220516 20220516112548 ACCESSION NUMBER: 0001213900-22-026835 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20220331 FILED AS OF DATE: 20220516 DATE AS OF CHANGE: 20220516 EFFECTIVENESS DATE: 20220516 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: 22926725 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 03-31-2022 03-31-2022 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 05-16-2022 0 165 499158 INFORMATION TABLE 2 infotable.xml ABM Industries, Inc. com 000957100 391 8500 SH SOLE 8500 0 0 ACM Research, Inc. Class A com 00108J109 1324 64000 SH SOLE 64000 0 0 AFYA Ltd. com G01125106 180 12500 SH SOLE 12500 0 0 AMN Healthcare Svcs com 001744101 365 3500 SH SOLE 3500 0 0 AMR Corp Escrow com 001ESC102 0 18000 SH SOLE 18000 0 0 Acadia Healthcare Co., Inc. com 00404A109 5019 76595 SH SOLE 56950 0 19645 Adtran, Inc. com 00738A106 1096 59400 SH SOLE 59400 0 0 Aehr Test Systems com 00760J108 1811 178200 SH SOLE 178200 0 0 Allied Motion Technologies com 019330109 1167 39100 SH SOLE 39100 0 0 Alpha & Omega Semiconductor com G6331P104 4044 74000 SH SOLE 74000 0 0 Alphabet, Inc. Cl C com 02079k107 223 80 SH SOLE 0 0 80 Alphatec Hldgs Inc. com 02081G201 5130 446060 SH SOLE 399050 0 47010 Amazon.com com 023135106 326 100 SH SOLE 0 0 100 Ameresco, Inc. com 02361E108 3618 45508 SH SOLE 45508 0 0 American Power Corp com 02906T107 0 10000 SH SOLE 0 0 10000 Amgen, Inc. com 031162100 333 1379 SH SOLE 0 0 1379 Amphastar Pharmaceuticals, Inc com 03209R103 485 13500 SH SOLE 13500 0 0 Amtech Systems, Inc. com 032332504 1114 110700 SH SOLE 110700 0 0 Angiodynamics, Inc. com 03475v101 5175 240270 SH SOLE 202300 0 37970 Antares Pharma, Inc. com 036642106 1411 344200 SH SOLE 344200 0 0 Apple, Inc. com 037833100 1042 5967 SH SOLE 240 0 5727 Applied Industrial com 03820c105 308 3000 SH SOLE 3000 0 0 Arco Platform Ltd. Com Cl A com G04553106 264 12500 SH SOLE 12500 0 0 Arlo Technologies, Inc. com 04206A101 970 109500 SH SOLE 109500 0 0 Avatar Ventures com 05350B100 0 10000 SH SOLE 0 0 10000 Aviat Networks, Inc. com 05366Y201 2253 73207 SH SOLE 73207 0 0 Avid Technology, Inc. com 05367P100 1461 41900 SH SOLE 41900 0 0 Avient Corporation com 05368V106 240 5000 SH SOLE 5000 0 0 Axcelis Technologies com 054540208 14486 191790 SH SOLE 160370 0 31420 BHP Billiton Ltd. ADR com 088606108 210 2718 SH SOLE 140 0 2578 BJs Wholesale Club Holdings, I com 05550J101 1543 22820 SH SOLE 7410 0 15410 BRP Group, Inc. com 05589G102 252 9400 SH SOLE 9400 0 0 Bel Fuse, Inc. com 077347300 1479 82900 SH SOLE 82900 0 0 Belden, Inc. com 077454106 2661 48026 SH SOLE 29771 0 18255 Boot Barn Hldgs, Inc. com 099406100 4747 50080 SH SOLE 50080 0 0 Builders Firstsource com 12008R107 1417 21960 SH SOLE 2140 0 19820 CTS Corp. com 126501105 1753 49600 SH SOLE 49600 0 0 Cabot Corp. com 127055101 486 7100 SH SOLE 7100 0 0 Cadence Design System, Inc. com 127387108 4128 25100 SH SOLE 25100 0 0 Camtek, Ltd. com M20791105 1766 57980 SH SOLE 57980 0 0 CarGurus, Inc. com 141788109 856 20150 SH SOLE 16200 0 3950 Cerus Corp. com 157085101 1096 199600 SH SOLE 199600 0 0 Ceva Inc. com 157210105 1488 36600 SH SOLE 36600 0 0 ChannelAdvisor Corporation com 159179100 2953 178240 SH SOLE 98480 0 79760 Clean Harbors, Inc. com 184496107 547 4900 SH SOLE 4900 0 0 Clearfield, Inc. com 18482P103 3163 48500 SH SOLE 48500 0 0 Constellium NV Cl A com F21107101 99848 5547097 SH SOLE 4114839 0 1432258 Controladora Vuela Comp de Avi com 21240E105 255 14000 SH SOLE 14000 0 0 Crocs, Inc. com 227046109 7469 97760 SH SOLE 77880 0 19880 Cross Country Healthcare, Inc. com 227483104 2537 117056 SH SOLE 117056 0 0 Cyberoptics Corp. com 232517102 1765 43500 SH SOLE 43500 0 0 DZS, Inc. com 268211109 1662 119800 SH SOLE 119800 0 0 Dada Nexus Limited com 23344D108 3277 358955 SH SOLE 358955 0 0 Datadog, Inc. Class A com 23804L103 5635 37200 SH SOLE 37200 0 0 Deckers Outdoor Corp. com 243537107 6921 25280 SH SOLE 19560 0 5720 Despegar Com Corp. com G27358103 142 11600 SH SOLE 11600 0 0 Diodes, Inc. com 254543101 426 4900 SH SOLE 4900 0 0 Dynavax Technologies Corp. com 268158201 1143 105400 SH SOLE 105400 0 0 Earthstone Energy Inc. com 27032D304 1076 85200 SH SOLE 85200 0 0 Employers Holdings, Inc. com 292218104 1128 27500 SH SOLE 27500 0 0 EnPro Industries, Inc. com 29355x107 1847 18900 SH SOLE 18900 0 0 Endava Plc Ads com 29260V105 55179 414787 SH SOLE 310638 0 104149 Entravision Communications com 29382r107 1731 270100 SH SOLE 270100 0 0 Everi Hldgs, Inc. com 30034T103 2390 113800 SH SOLE 113800 0 0 Evolent Health, Inc. com 30050B101 552 17100 SH SOLE 17100 0 0 Extreme Networks, Inc. com 30226D106 2010 164600 SH SOLE 164600 0 0 First Foundation Inc. com 32026V104 855 35200 SH SOLE 35200 0 0 Focus Finl Partners, Inc. com 34417P100 306 6700 SH SOLE 6700 0 0 Forrester Research, Inc. com 346563109 3041 53900 SH SOLE 53900 0 0 Franklin Covey Co. com 353469109 1872 41400 SH SOLE 41400 0 0 Franklin Electric com 353514102 424 5100 SH SOLE 5100 0 0 Full House Resorts, Inc. com 359678109 1831 190543 SH SOLE 190543 0 0 Funko, Inc. com 361008105 1973 114400 SH SOLE 114400 0 0 Guess, Inc com 401617105 4163 190531 SH SOLE 146900 0 43631 Hackett Group, Inc. com 404609109 1965 85200 SH SOLE 85200 0 0 Halozyme Therapeutics, Inc. com 40637H109 4285 107450 SH SOLE 85660 0 21790 ICF International, Inc. com 44925C103 2184 23200 SH SOLE 23200 0 0 Impinj, Inc. com 453204109 1569 24700 SH SOLE 24700 0 0 Information Svcs Group, Inc. com 45675Y104 1676 246100 SH SOLE 246100 0 0 Inmode Ltd. com M5425M103 1932 52350 SH SOLE 40660 0 11690 Inotiv, Inc. com 45783Q100 1805 68944 SH SOLE 68944 0 0 Intel Corporation com 458140100 242 4880 SH SOLE 0 0 4880 Inter Parfums com 458334109 484 5500 SH SOLE 5500 0 0 International Money Express, I com 46005L101 1445 70100 SH SOLE 70100 0 0 JP Morgan Chase & Company Inc. com 46625H100 552 4050 SH SOLE 140 0 3910 Johnson & Johnson com 478160104 476 2688 SH SOLE 0 0 2688 Johnson Outdoors, Inc. com 479167108 1096 14100 SH SOLE 14100 0 0 KForce, Inc. com 493732101 1272 17200 SH SOLE 17200 0 0 Knowles Corp. com 49926D109 269 12500 SH SOLE 12500 0 0 Korn Ferry com 500643200 455 7000 SH SOLE 7000 0 0 Lantheus Hldgs Inc. com 516544103 11408 206260 SH SOLE 191520 0 14740 Lifetime Brands, Inc. com 53222q103 776 60400 SH SOLE 60400 0 0 Liveramp Hldgs, Inc. com 53815P108 221 5900 SH SOLE 5900 0 0 Lovesac Company com 54738L109 1865 34500 SH SOLE 34500 0 0 M/I Homes, Inc. com 55305B101 1574 35500 SH SOLE 35500 0 0 Macom Technology Solutions com 55405Y100 281 4700 SH SOLE 4700 0 0 Magnolia Oil & Gas Corp. com 559663109 284 12000 SH SOLE 12000 0 0 Malibu Boats, Inc. com 56117J100 2446 42170 SH SOLE 29820 0 12350 Mastercard, Inc. com 57636Q104 341 954 SH SOLE 0 0 954 Materion Corp. com 576690101 8532 99505 SH SOLE 76015 0 23490 Maxlinear, Inc. Class A com 57776J100 2077 35600 SH SOLE 12950 0 22650 McDonald's Corporation com 580135101 206 835 SH SOLE 0 0 835 Mercantile Bank Corp. com 587376104 1411 39839 SH SOLE 21900 0 17939 Merit Medical System Inc com 589889104 452 6800 SH SOLE 6800 0 0 Microsoft Corp. com 594918104 942 3055 SH SOLE 0 0 3055 Model N, Inc. com 607525102 3211 119360 SH SOLE 97180 0 22180 Monarch Casino & Resort, Inc. com 609027107 2163 24800 SH SOLE 24800 0 0 Movado Group, Inc. com 624580106 2156 55200 SH SOLE 55200 0 0 NOV, Inc. com 62955J103 298 15200 SH SOLE 15200 0 0 NV5 Global, Inc com 62945V109 293 2200 SH SOLE 2200 0 0 Newmont Mining com 651639106 465 5857 SH SOLE 400 0 5457 Nova Measuring Instruments com M7516K103 61681 566500 SH SOLE 420200 0 146300 OOMA Inc. com 683416101 874 58300 SH SOLE 58300 0 0 Option Care Health Inc. com 68404L201 331 11600 SH SOLE 11600 0 0 PDC Energy, Inc. com 69327R101 320 4400 SH SOLE 4400 0 0 Patrick Industries, Inc. com 703343103 320 5300 SH SOLE 5300 0 0 Patterson-Uti Energy, Inc. com 703481101 1938 125200 SH SOLE 125200 0 0 Perficient Inc. com 71375U101 1894 17200 SH SOLE 17200 0 0 Perion Network, Ltd. com M78673114 2885 128300 SH SOLE 128300 0 0 Photronics, Inc. com 719405102 1612 95000 SH SOLE 95000 0 0 Pinduoduo Inc. com 722304102 1404 35000 SH SOLE 35000 0 0 Preformed Line Prods Co. com 740444104 444 7000 SH SOLE 7000 0 0 RF Industries Ltd. com 749552105 469 65000 SH SOLE 65000 0 0 RPC, Inc. com 749660106 2021 189400 SH SOLE 189400 0 0 Radnet, Inc. com 750491102 1228 54900 SH SOLE 54900 0 0 Rapid7, Inc. com 753422104 2821 25360 SH SOLE 14940 0 10420 Resmed Inc. com 761152107 352 1450 SH SOLE 0 0 1450 Resources Connection, Inc. com 76122q105 2044 119269 SH SOLE 119269 0 0 Revolve Group, Inc. com 76156B107 430 8000 SH SOLE 8000 0 0 Rocky Brands, Inc. com 774515100 1327 31900 SH SOLE 31900 0 0 SP Plus Corporation com 78469C103 1261 40200 SH SOLE 40200 0 0 Scansource, Inc. com 806037107 1496 43000 SH SOLE 43000 0 0 SeaWorld Entertainment Inc. com 81282v100 2200 29560 SH SOLE 11020 0 18540 Shutterstock, Inc. com 825690100 3230 34702 SH SOLE 14305 0 20397 Shyft Group, Inc. com 825698103 1434 39700 SH SOLE 39700 0 0 Sierra Wireless, Inc. com 826516106 1795 99489 SH SOLE 99489 0 0 Skyline Champion Corporation com 830830105 1045 19040 SH SOLE 18590 0 450 Smart Global Hldgs, Inc. com G8232Y101 1795 69500 SH SOLE 69500 0 0 Sterling Construction Co., Inc com 859241101 2152 80300 SH SOLE 80300 0 0 Stewart Information Services com 860372101 206 3400 SH SOLE 3400 0 0 Stride, Inc. com 86333M108 509 14000 SH SOLE 14000 0 0 Synaptics, Inc. com 87157D109 10512 52690 SH SOLE 39880 0 12810 Taiwan Semiconductor com 874039100 1147 11000 SH SOLE 11000 0 0 Techtarget, Inc. com 87874R100 276 3400 SH SOLE 3400 0 0 Teradata Corp com 88076W103 1384 28080 SH SOLE 25920 0 2160 The Travelers Co., Inc. com 89417E109 406 2220 SH SOLE 0 0 2220 Titan Int'l Inc. com 88830M102 1282 87000 SH SOLE 87000 0 0 Titan Machinery, Inc. com 88830R101 1116 39500 SH SOLE 39500 0 0 Titan Oil & Gas, Inc. com 888309101 0 10000 SH SOLE 0 0 10000 Trex Company, Inc. com 89531P105 559 8560 SH SOLE 1080 0 7480 TrueBlue, Inc. com 89785X101 1473 51000 SH SOLE 51000 0 0 UFP Industries, Inc. com 90278Q108 270 3500 SH SOLE 3500 0 0 Ultra Clean Holdings com 90385V107 6788 160140 SH SOLE 132560 0 27580 Univar Solutions, Inc. com 91336L107 389 12100 SH SOLE 12100 0 0 Universal Technical Inst, Inc. com 913915104 720 81300 SH SOLE 81300 0 0 Veritiv Corp. com 923454102 6672 49942 SH SOLE 49942 0 0 Verizon Communications com 92343V104 217 4253 SH SOLE 0 0 4253 Vishay Precision Group com 92835K103 1392 43300 SH SOLE 43300 0 0 Visteon Corp. com 92839U206 284 2600 SH SOLE 2600 0 0 Wal Mart Stores Inc. com 931142103 236 1582 SH SOLE 0 0 1582 Xenacare Hldgs, Inc. com 98401A106 0 140000 SH SOLE 0 0 140000 Yum China Hldgs, Inc. com 98850P109 1059 25500 SH SOLE 25500 0 0 ZipRecruiter, Inc. com 98980B103 308 13400 SH SOLE 13400 0 0 a.k.a. Brands Hldg Corp. com 00152K101 164 37040 SH SOLE 37040 0 0 SPDR S&P 500 ETF Trust com 78462F103 1638 3627 SH SOLE 0 0 3627