0001104659-20-095221.txt : 20200814 0001104659-20-095221.hdr.sgml : 20200814 20200814112951 ACCESSION NUMBER: 0001104659-20-095221 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20200630 FILED AS OF DATE: 20200814 DATE AS OF CHANGE: 20200814 EFFECTIVENESS DATE: 20200814 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: 201103004 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 06-30-2020 06-30-2020 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 08-14-2020 0 123 254665 INFORMATION TABLE 2 infotable.xml 21Vianet Group, Inc. - ADR com 90138A103 1551 65000 SH SOLE 65000 0 0 ACM Research, Inc. Class A com 00108J109 2170 34800 SH SOLE 34800 0 0 AMR Corp Escrow com 001ESC102 0 18000 SH SOLE 18000 0 0 Accuray Inc. com 004397105 368 181200 SH SOLE 181200 0 0 Addus Homecare Corp. com 006739106 2258 24390 SH SOLE 20560 0 3830 Adtran, Inc. com 00738A106 435 39800 SH SOLE 39800 0 0 Air Transport Services Group, com 00922R105 859 38580 SH SOLE 38100 0 480 Alibaba ADR com 01609W102 7786 36095 SH SOLE 34130 0 1965 Allied Motion Technologies com 019330109 618 17500 SH SOLE 17500 0 0 Amazon.com com 023135106 276 100 SH SOLE 0 0 100 Amedisys Inc. com 023436108 635 3200 SH SOLE 3200 0 0 Ameresco, Inc. com 02361E108 1236 44508 SH SOLE 44508 0 0 American Power Corp com 02906T107 0 10000 SH SOLE 0 0 10000 Amgen, Inc. com 031162100 352 1493 SH SOLE 0 0 1493 Antares Pharma, Inc. com 036642106 552 200600 SH SOLE 200600 0 0 Apple, Inc. com 037833100 790 2164 SH SOLE 60 0 2104 Arco Platform Ltd. Com Cl A com G04553106 844 19400 SH SOLE 19400 0 0 Audio Codes ADR com M15342104 12937 406947 SH SOLE 305047 0 101900 Avatar Ventures com 05350B100 0 10000 SH SOLE 0 0 10000 Axcelis Technologies com 054540208 2152 77270 SH SOLE 66880 0 10390 BJs Wholesale Club Holdings, I com 05550J101 205 5500 SH SOLE 5500 0 0 Bandwidth, Inc. com 05988J103 6406 50439 SH SOLE 39469 0 10970 Baudax Bio, Inc. com 07160F107 652 157220 SH SOLE 157220 0 0 Bilibili, Inc. Spon ADR com 090040106 996 21500 SH SOLE 21500 0 0 BioDelivery Sciences Internati com 09060J106 1446 331700 SH SOLE 329600 0 2100 Boot Barn Hldgs, Inc. com 099406100 539 25000 SH SOLE 25000 0 0 Bottomline Technologies com 101388106 2592 51060 SH SOLE 41070 0 9990 CACI International, Inc. com 127190304 2090 9635 SH SOLE 6690 0 2945 CRA Int'l Inc. com 12618T105 731 18500 SH SOLE 18500 0 0 Cadence Design System, Inc. com 127387108 295 3079 SH SOLE 3079 0 0 Caesars Entertainment com 12769G100 231 5770 SH SOLE 4200 0 1570 Camtek, Ltd. com M20791105 742 58980 SH SOLE 58980 0 0 Cardtronics, Inc. com G1991C105 703 29300 SH SOLE 29300 0 0 CareDx, Inc. com 14167L103 3074 86750 SH SOLE 73560 0 13190 Castle Biosciences, Inc. com 14843C105 5992 158990 SH SOLE 120700 0 38290 Ceva Inc. com 157210105 1063 28400 SH SOLE 28400 0 0 ChannelAdvisor Corporation com 159179100 3676 232060 SH SOLE 197050 0 35010 Chegg, Inc. com 163092109 336 5000 SH SOLE 5000 0 0 Coherus Biosciences, Inc. com 19249H103 398 22300 SH SOLE 22300 0 0 Collegium Pharmaceutical, Inc. com 19459J104 931 53200 SH SOLE 53200 0 0 Constellium NV Cl A com F21107101 28579 3721211 SH SOLE 2790311 0 930900 Crocs, Inc. com 227046109 1635 44400 SH SOLE 44400 0 0 Deckers Outdoor Corp. com 243537107 3058 15570 SH SOLE 10350 0 5220 Digital Turbine, Inc. com 25400W102 1560 124100 SH SOLE 124100 0 0 Ehealth, Inc. com 28238P109 4611 46938 SH SOLE 34771 0 12167 Endava Plc Ads com 29260V105 24343 504000 SH SOLE 380400 0 123600 Ensign Group, Inc. com 29358P101 837 20000 SH SOLE 20000 0 0 Enterprise Finl Svcs com 293712105 1004 32262 SH SOLE 20520 0 11742 EverQuote, Inc. com 30041R108 1506 25900 SH SOLE 25900 0 0 Faro Technologies, Inc. com 311642102 1051 19600 SH SOLE 19600 0 0 Federal Signal Corp. com 313855108 366 12300 SH SOLE 12300 0 0 First Foundation Inc. com 32026V104 430 26300 SH SOLE 26300 0 0 Fiverr Intl Ltd. com M4R82T106 45495 616296 SH SOLE 462096 0 154200 GDS Holdings Ltd. ADR com 36165L108 2411 30261 SH SOLE 30161 0 100 Green Dot Corp. Cl A com 39304D102 236 4800 SH SOLE 4800 0 0 Griffon Corp. com 398433102 682 36800 SH SOLE 36800 0 0 Herman Miller, Inc. com 600544100 458 19400 SH SOLE 19400 0 0 Huron Consulting Group, Inc. com 447462102 398 9000 SH SOLE 9000 0 0 II-VI Inc. com 902104108 1454 30790 SH SOLE 20480 0 10310 INPHI Corp. com 45772F107 6055 51530 SH SOLE 36360 0 15170 Impinj, Inc. com 453204109 461 16800 SH SOLE 16800 0 0 Inmode Ltd. com M5425M103 629 22200 SH SOLE 22200 0 0 Inseego Corp. com 45782B104 368 31700 SH SOLE 31700 0 0 Intel Corporation com 458140100 355 5933 SH SOLE 0 0 5933 JD.com ADR com 47215P106 1700 28250 SH SOLE 28000 0 250 JP Morgan Chase & Company Inc. com 46625H100 420 4469 SH SOLE 140 0 4329 Johnson & Johnson com 478160104 349 2478 SH SOLE 0 0 2478 Kingsoft Cloud Holdings Limite com 49639K101 221 7000 SH SOLE 7000 0 0 Lattice Semiconductor Corporat com 518415104 721 25400 SH SOLE 25400 0 0 Limelight Networks, Inc. com 53261M104 1855 252100 SH SOLE 252100 0 0 LiqTech International, Inc com 53632A201 1381 252980 SH SOLE 252980 0 0 Livongo Health, Inc. com 539183103 1436 19100 SH SOLE 19100 0 0 M/I Homes, Inc. com 55305B101 844 24500 SH SOLE 24500 0 0 MYR Group, Inc. com 55405W104 657 20600 SH SOLE 20600 0 0 Magnachip Semiconductor Corp. com 55933J203 711 69000 SH SOLE 69000 0 0 Magnite, Inc. com 55955D100 2550 382337 SH SOLE 306987 0 75350 Malibu Boats, Inc. com 56117J100 281 5400 SH SOLE 5400 0 0 Masonite Intl Corp. com 575385109 1058 13600 SH SOLE 13600 0 0 Mastercard, Inc. com 57636Q104 409 1383 SH SOLE 0 0 1383 McGrath RentCorp com 580589109 605 11200 SH SOLE 11200 0 0 Mercury Systems, Inc. com 589378108 693 8810 SH SOLE 4310 0 4500 Merit Medical System Inc com 589889104 205 4500 SH SOLE 4500 0 0 Microsoft Corp. com 594918104 608 2990 SH SOLE 0 0 2990 Model N, Inc. com 607525102 2803 80640 SH SOLE 66830 0 13810 NIO Inc com 62914V106 772 100000 SH SOLE 100000 0 0 Napco Sec Technologies, Inc. com 630402105 1161 49637 SH SOLE 49637 0 0 Natural Grocers By Vitamin C com 63888U108 339 22800 SH SOLE 22800 0 0 New Oriental Education ADR com 647581107 1628 12500 SH SOLE 12500 0 0 Newmont Mining com 651639106 373 6042 SH SOLE 400 0 5642 Northwest Pipe Co. com 667746101 434 17300 SH SOLE 17300 0 0 OOMA Inc. com 683416101 562 34100 SH SOLE 34100 0 0 OneSpan, Inc. com 68287N100 1268 45400 SH SOLE 42700 0 2700 Oxford Immunotec Global Plc com G6855A103 550 42300 SH SOLE 42300 0 0 Perdoceo Education Corp. com 71363P106 4576 287279 SH SOLE 226909 0 60370 Perficient Inc. com 71375U101 805 22500 SH SOLE 22500 0 0 Pfenex, Inc. com 717071104 377 45200 SH SOLE 45200 0 0 Powell Industries Inc. com 739128106 587 21435 SH SOLE 21435 0 0 Pros Holdings, Inc. com 74346Y103 533 12000 SH SOLE 12000 0 0 Rapid7, Inc. com 753422104 1441 28250 SH SOLE 16640 0 11610 Resmed Inc. com 761152107 278 1450 SH SOLE 0 0 1450 Ruth's Hospitality Group, Inc. com 783332109 522 64000 SH SOLE 64000 0 0 SPS Comm Inc. com 78463M107 248 3300 SH SOLE 3300 0 0 SVMK Inc com 78489X103 1410 59900 SH SOLE 36490 0 23410 Sea Ltd com 81141R100 1200 11187 SH SOLE 11187 0 0 Shyft Group, Inc. com 825698103 1122 66600 SH SOLE 66600 0 0 Sonic Automotive 'a' com 83545G102 922 28900 SH SOLE 28900 0 0 Stamps.com, Inc. com 852857200 257 1400 SH SOLE 1400 0 0 Synnex Corp. com 87162W100 216 1800 SH SOLE 1800 0 0 Tactile Sys Technology, Inc. com 87357P100 858 20700 SH SOLE 20700 0 0 Tal Education Group ADR com 874080104 2462 36000 SH SOLE 36000 0 0 Tandem Diabetes Care, Inc. com 875372203 5859 59225 SH SOLE 39340 0 19885 Tennant Company com 880345103 637 9800 SH SOLE 9800 0 0 The Travelers Co., Inc. com 89417E109 283 2482 SH SOLE 0 0 2482 Tital Oil & Gas, Inc. com 888309101 0 10000 SH SOLE 0 0 10000 Trex Company, Inc. com 89531P105 847 6510 SH SOLE 2090 0 4420 Ultra Clean Holdings com 90385V107 1301 57500 SH SOLE 57500 0 0 Upland Software, Inc. com 91544A109 886 25500 SH SOLE 25500 0 0 Wal Mart Stores Inc. com 931142103 215 1796 SH SOLE 0 0 1796 Xenacare Hldgs, Inc. com 98401A106 0 140000 SH SOLE 0 0 140000 Zix Corp. com 98974P100 561 81300 SH SOLE 81300 0 0 Zumiez Inc. com 989817101 690 25200 SH SOLE 25200 0 0 eGain Corp. com 28225C806 734 66100 SH SOLE 66100 0 0 SPDR S&P 500 ETF Trust com 78462F103 1345 4360 SH SOLE 0 0 4360