0001213900-23-039430.txt : 20230515 0001213900-23-039430.hdr.sgml : 20230515 20230515104547 ACCESSION NUMBER: 0001213900-23-039430 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20230331 FILED AS OF DATE: 20230515 DATE AS OF CHANGE: 20230515 EFFECTIVENESS DATE: 20230515 FILER: COMPANY DATA: COMPANY CONFORMED NAME: OBERWEIS ASSET MANAGEMENT INC/ CENTRAL INDEX KEY: 0000937886 IRS NUMBER: 364106772 STATE OF INCORPORATION: IL FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-04688 FILM NUMBER: 23919517 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 X0202 13F-HR LIVE false false false 0000937886 XXXXXXXX 03-31-2023 03-31-2023 false OBERWEIS ASSET MANAGEMENT INC/

3333 Warrenville Road Suite 500 Lisle IL 60532

13F HOLDINGS REPORT 028-04688 000105471 801-35657 N Thomas P. Joyce 800-323-6166 /s/ Thomas P. Joyce Lisle IL 05-15-2023 0 174 644539440 INFORMATION TABLE 2 infotable.xml 2U, Inc. com 90214J101 1810455 264300 SH SOLE 264300 0 0 A10 Networks, Inc. com 002121101 3310213 213700 SH SOLE 213700 0 0 ABM Industries, Inc. com 000957100 2602026 57900 SH SOLE 57900 0 0 ACM Research, Inc. Class A com 00108J109 2522520 215600 SH SOLE 215600 0 0 ADMA Biologics, Inc. com 000899104 3871045 1169500 SH SOLE 1169500 0 0 AMR Corp Escrow com 001ESC102 0 18000 SH SOLE 18000 0 0 ATI, Inc. com 01741R102 2876634 72900 SH SOLE 72900 0 0 Acadia Healthcare Co., Inc. com 00404A109 2514300 34800 SH SOLE 34800 0 0 Adtran, Inc. com 00486H105 2082418 131300 SH SOLE 131300 0 0 Aehr Test Systems com 00760J108 21686330 699108 SH SOLE 698808 0 300 Alight, Inc. com 01626W101 2226573 241756 SH SOLE 241756 0 0 Allegro MicroSystems, Inc. com 01749D105 5926765 123500 SH SOLE 123500 0 0 Allied Motion Technologies com 019330109 2187590 56600 SH SOLE 56600 0 0 Allison Transmission Holdings, com 01973R101 3003936 66400 SH SOLE 66400 0 0 Alphatec Hldgs Inc. com 02081G201 10585068 678530 SH SOLE 608160 0 70370 Alta Equipment Group, Inc. com 02128L106 1711800 108000 SH SOLE 108000 0 0 Alteryx, Inc. Com Cl A com 02156B103 3315634 56350 SH SOLE 56200 0 150 Amazon.com com 023135106 206580 2000 SH SOLE 0 0 2000 American Power Corp com 02906T107 0 10000 SH SOLE 0 0 10000 Amgen, Inc. com 031162100 334035 1382 SH SOLE 0 0 1382 Amphastar Pharmaceuticals, Inc com 03209R103 6682500 178200 SH SOLE 178200 0 0 Amtech Systems, Inc. com 032332504 1134306 118900 SH SOLE 118900 0 0 Amylyx Pharmaceuticals, Inc. com 03237H101 1769349 60305 SH SOLE 60305 0 0 Apple, Inc. com 037833100 903526 5479 SH SOLE 240 0 5239 Applied Industrial com 03820c105 2672044 18800 SH SOLE 18800 0 0 Avatar Ventures com 05350B100 0 10000 SH SOLE 0 0 10000 Aviat Networks, Inc. com 05366Y201 3256711 94507 SH SOLE 94507 0 0 Avid Technology, Inc. com 05367P100 2078700 65000 SH SOLE 65000 0 0 Axcelis Technologies com 054540208 36242534 271989 SH SOLE 239909 0 32080 Axonics, Inc. com 05465P101 5223574 95740 SH SOLE 80450 0 15290 Bel Fuse, Inc. com 077347300 4565970 121500 SH SOLE 121500 0 0 Belden, Inc. com 077454106 8041188 92672 SH SOLE 72926 0 19747 Blue Bird Corporation com 095306106 2600739 127300 SH SOLE 127300 0 0 Boot Barn Hldgs, Inc. com 099406100 3157568 41200 SH SOLE 41200 0 0 Brookline Bancorp, Inc. com 11373M107 1578150 150300 SH SOLE 150300 0 0 CECO Environmental Corp. com 125141101 3114174 222600 SH SOLE 222600 0 0 CVD Equipment Corp. com 126601103 429590 32300 SH SOLE 32300 0 0 Cabot Corp. com 127055101 4625297 60351 SH SOLE 49537 0 10814 Cadence Design System, Inc. com 127387108 3718593 17700 SH SOLE 17700 0 0 Caleres Inc. com 129500104 1245888 57600 SH SOLE 57600 0 0 Calix, Inc. com 13100M509 3274349 61100 SH SOLE 61100 0 0 Camtek, Ltd. com M20791105 3336228 117680 SH SOLE 117680 0 0 Catalyst Pharmaceuticals, Inc. com 14888U101 2443892 147400 SH SOLE 147400 0 0 Ciena Corporation com 171779309 6213379 118305 SH SOLE 99390 0 18915 Clean Harbors, Inc. com 184496107 7247038 50835 SH SOLE 43630 0 7205 Clearwater Paper Corp com 18538R103 1888230 56500 SH SOLE 56500 0 0 Comstock Res com 205768302 2186315 202624 SH SOLE 202624 0 0 Constellium NV Cl A com F21107101 69581850 4553786 SH SOLE 3018754 0 1535032 Controladora Vuela Comp de Avi com 21240E105 231384 18600 SH SOLE 18600 0 0 Crocs, Inc. com 227046109 13320454 105350 SH SOLE 83150 0 22200 Dada Nexus Limited com 23344D108 2970531 350712 SH SOLE 349312 0 1400 Deckers Outdoor Corp. com 243537107 12713274 28280 SH SOLE 21980 0 6300 Destination XL Group, Inc. com 25065K104 2262500 410617 SH SOLE 410617 0 0 Dynavax Technologies Corp. com 268158201 1735389 176900 SH SOLE 176900 0 0 EZCorp, Inc. com 302301106 3194900 371500 SH SOLE 371500 0 0 Earthstone Energy Inc. com 27032D304 2496619 191900 SH SOLE 191900 0 0 Eli Lilly & Company com 532457108 209109 609 SH SOLE 0 0 609 Employers Holdings, Inc. com 292218104 2413851 57900 SH SOLE 57900 0 0 Everi Hldgs, Inc. com 30034T103 5167295 301300 SH SOLE 301300 0 0 Evolent Health, Inc. com 30050B101 5442190 167710 SH SOLE 147360 0 20350 Extreme Networks, Inc. com 30226D106 3843120 201000 SH SOLE 201000 0 0 Fabrinet com G3323L100 4767620 40145 SH SOLE 32360 0 7785 Federal Signal Corp. com 313855108 3160443 58300 SH SOLE 58300 0 0 First Merchants Corporation com 320817109 1387195 42100 SH SOLE 42100 0 0 FirstCash Holdings, Inc com 33768G107 2040918 21400 SH SOLE 21400 0 0 Formfactor Inc. com 346375108 3232775 101500 SH SOLE 101500 0 0 Franklin Covey Co. com 353469109 2623654 68200 SH SOLE 68200 0 0 Franklin Electric com 353514102 3246450 34500 SH SOLE 34500 0 0 Full House Resorts, Inc. com 359678109 1613324 223143 SH SOLE 223143 0 0 Granite Construction com 387328107 1951300 47500 SH SOLE 47500 0 0 Grupo Aeroportuario del Centro com 400501102 268530 3000 SH SOLE 3000 0 0 Guess, Inc com 401617105 1872052 96200 SH SOLE 96200 0 0 H&E Equipment Services, Inc. com 404030108 2468034 55800 SH SOLE 55800 0 0 Haemonetics Corp. com 405024100 3053475 36900 SH SOLE 36900 0 0 Halozyme Therapeutics, Inc. com 40637H109 6264688 164040 SH SOLE 138850 0 25190 Harmonic, Inc. com 413160102 2224975 152500 SH SOLE 152500 0 0 Haynes Intl, Inc. com 420877201 2549581 50900 SH SOLE 50900 0 0 Heritage Financial Corporation com 42722X106 2052174 95896 SH SOLE 95896 0 0 Hexcel Corporation com 428291108 2361450 34600 SH SOLE 34600 0 0 ICF International, Inc. com 44925C103 6954980 63400 SH SOLE 63400 0 0 Impinj, Inc. com 453204109 19823188 146275 SH SOLE 126190 0 20085 Inmode Ltd. com M5425M103 4122840 129000 SH SOLE 118660 0 10340 Insperity, Inc. com 45778Q107 2321605 19100 SH SOLE 19100 0 0 Inspire Medical Systems, Inc. com 457730109 1392717 5950 SH SOLE 5950 0 0 Inter Parfums com 458334109 3470656 24400 SH SOLE 24400 0 0 International Money Express, I com 46005L101 2366604 91800 SH SOLE 91800 0 0 International Seaways, Inc. com Y41053102 2142352 51400 SH SOLE 51400 0 0 JP Morgan Chase & Company Inc. com 46625H100 533204 4092 SH SOLE 140 0 3952 Janus International Group, Inc com 47103N106 2090320 212000 SH SOLE 212000 0 0 Johnson & Johnson com 478160104 419729 2708 SH SOLE 0 0 2708 KE Holdings, Inc. com 482497104 753600 40000 SH SOLE 40000 0 0 KVH Industries, Inc. com 482738101 1035580 91000 SH SOLE 91000 0 0 Kontoor Brands, Inc. com 50050N103 2240457 46300 SH SOLE 46300 0 0 LSI Industries Inc. com 50216C108 2517151 180700 SH SOLE 180700 0 0 Lantheus Hldgs Inc. com 516544103 14740262 178540 SH SOLE 164020 0 14520 LeMaitre Vascular, Inc. com 525558201 1477189 28700 SH SOLE 28700 0 0 Liberty Energy, Inc. com 53115L104 1407819 109900 SH SOLE 109900 0 0 M/I Homes, Inc. com 55305B101 1526778 24200 SH SOLE 24200 0 0 MGP Ingredients, Inc. com 55303J106 3090204 31950 SH SOLE 31800 0 150 MINISO Group Holding Limited com 66981J102 2249432 126800 SH SOLE 126800 0 0 MP Materials Corp. com 553368101 1482794 52600 SH SOLE 52600 0 0 MRC Global, Inc. com 55345K103 1703916 175300 SH SOLE 175300 0 0 Macom Technology Solutions com 55405Y100 3124044 44100 SH SOLE 44100 0 0 Magnolia Oil & Gas Corp. com 559663109 1693512 77400 SH SOLE 77400 0 0 Mastercard, Inc. com 57636Q104 350688 965 SH SOLE 0 0 965 Matador Resources Company com 576485205 1782110 37400 SH SOLE 37400 0 0 Maximus, Inc. com 577933104 3210960 40800 SH SOLE 40800 0 0 Maxlinear, Inc. Class A com 57776J100 4945597 140460 SH SOLE 111220 0 29240 McDonald's Corporation com 580135101 234745 840 SH SOLE 0 0 840 Mercantile Bank Corp. com 587376104 1835833 60034 SH SOLE 39400 0 20634 Merit Medical System Inc com 589889104 3239010 43800 SH SOLE 43800 0 0 Microsoft Corp. com 594918104 880757 3055 SH SOLE 0 0 3055 Model N, Inc. com 607525102 4894653 146240 SH SOLE 121410 0 24830 Modine Mfg Co Com com 607828100 2208190 95800 SH SOLE 95800 0 0 Monarch Casino & Resort, Inc. com 609027107 2624910 35400 SH SOLE 35400 0 0 Murphy USA, Inc. com 626755102 1032200 4000 SH SOLE 4000 0 0 NOV, Inc. com 62955J103 1674692 90475 SH SOLE 90475 0 0 NerdWallet, Inc. com 64082B102 3716546 229700 SH SOLE 229700 0 0 New Relic, Inc. com 64829B100 2205997 29300 SH SOLE 29300 0 0 Newmont Mining com 651639106 289046 5896 SH SOLE 400 0 5496 Nine Energy Service, Inc. com 65441V101 1252112 225200 SH SOLE 225200 0 0 Novanta, Inc. com 67000B104 1113630 7000 SH SOLE 7000 0 0 O-I Glass, Inc. com 67098H104 2725200 120000 SH SOLE 120000 0 0 OneSpan, Inc. com 68287N100 6322750 361300 SH SOLE 361300 0 0 Option Care Health Inc. com 68404L201 3094398 97400 SH SOLE 97400 0 0 Oxford Inds, Inc. com 691497309 2597514 24600 SH SOLE 24600 0 0 PDC Energy, Inc. com 69327R101 2564634 39960 SH SOLE 26460 0 13500 Patterson-Uti Energy, Inc. com 703481101 1917560 163894 SH SOLE 163894 0 0 Pdf Solutions, Inc. com 693282105 1823200 43000 SH SOLE 43000 0 0 Perion Network, Ltd. com M78673114 15324189 387170 SH SOLE 358740 0 28430 Photronics, Inc. com 719405102 2806994 169300 SH SOLE 169300 0 0 Pinduoduo Inc. com 722304102 1897500 25000 SH SOLE 25000 0 0 Playa Hotels & Resorts N.V. com N70544106 3678720 383200 SH SOLE 383200 0 0 Preferred Bank com 740367404 2822715 51500 SH SOLE 51500 0 0 Quaker Chemical Corporation com 747316107 2850480 14400 SH SOLE 14400 0 0 RF Industries Ltd. com 749552105 277640 63100 SH SOLE 63100 0 0 RPC, Inc. com 749660106 4727700 614785 SH SOLE 539701 0 75084 Resmed Inc. com 761152107 317536 1450 SH SOLE 0 0 1450 Rocky Brands, Inc. com 774515100 832827 36100 SH SOLE 36100 0 0 SP Plus Corporation com 78469C103 2976372 86800 SH SOLE 86800 0 0 Scansource, Inc. com 806037107 2219076 72900 SH SOLE 72900 0 0 SeaWorld Entertainment Inc. com 81282v100 4953848 80800 SH SOLE 62320 0 18480 ShockWave Medical, Inc. com 82489T104 1485286 6850 SH SOLE 6850 0 0 SiTime Corporation com 82982T106 3100614 21800 SH SOLE 21800 0 0 Silicon Laboratories, Inc. com 826919102 3643623 20810 SH SOLE 20810 0 0 Sterling Construction Co., Inc com 859241101 3708452 97900 SH SOLE 97900 0 0 SunOpta, Inc. com 8676EP108 3240160 420800 SH SOLE 420800 0 0 Synaptics, Inc. com 87157D109 4474899 40260 SH SOLE 34040 0 6220 Tactile Sys Technology, Inc. com 87357P100 4261811 259550 SH SOLE 259550 0 0 Tencent Music Entertainment com 88034P109 1283400 155000 SH SOLE 155000 0 0 Texas Roadhouse com 882681109 1437198 13300 SH SOLE 13300 0 0 The Chefs Warehouse, Inc. com 163086101 3527580 103600 SH SOLE 103600 0 0 The Travelers Co., Inc. com 89417E109 382054 2229 SH SOLE 0 0 2229 Titan Machinery, Inc. com 88830R101 1830045 60100 SH SOLE 60100 0 0 Titan Oil & Gas, Inc. com 888309101 0 10000 SH SOLE 0 0 10000 Topgolf Callaway Brands Corp. com 131193104 2990046 138300 SH SOLE 138300 0 0 TransMedics Group, Inc. com 89377M109 8201559 108300 SH SOLE 108300 0 0 Treace Medical Concepts, Inc. com 89455T109 3886817 154300 SH SOLE 154300 0 0 UNUM Group com 91529Y106 2017560 51000 SH SOLE 51000 0 0 Ultra Clean Holdings com 90385V107 4400332 132700 SH SOLE 132700 0 0 Univar Solutions, Inc. com 91336L107 1807548 51600 SH SOLE 51600 0 0 V2X, Inc. com 92242T101 3090216 77800 SH SOLE 77800 0 0 VSE Corp. com 918284100 1728650 38500 SH SOLE 38500 0 0 Veracyte, Inc. com 92337F107 4731614 212180 SH SOLE 186620 0 25560 Veritiv Corp. com 923454102 9120599 67490 SH SOLE 67490 0 0 Viad Corp. com 92552R406 247704 11886 SH SOLE 11886 0 0 Vishay Precision Group com 92835K103 2229984 53400 SH SOLE 53400 0 0 Visteon Corp. com 92839U206 6179102 39400 SH SOLE 39400 0 0 Wal Mart Stores Inc. com 931142103 233932 1587 SH SOLE 0 0 1587 Washington Federal, Inc. com 938824109 1752984 58200 SH SOLE 58200 0 0 Weatherford International PLC com G48833118 1738955 29300 SH SOLE 29300 0 0 Xenacare Hldgs, Inc. com 98401A106 0 140000 SH SOLE 0 0 140000 Zeta Global Holdings Corp. com 98956A105 2310039 213300 SH SOLE 213300 0 0 SPDR S&P 500 ETF Trust com 78462F103 1468357 3587 SH SOLE 0 0 3587