0001144204-12-029188.txt : 20120515 0001144204-12-029188.hdr.sgml : 20120515 20120515120547 ACCESSION NUMBER: 0001144204-12-029188 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20120331 FILED AS OF DATE: 20120515 DATE AS OF CHANGE: 20120515 EFFECTIVENESS DATE: 20120515 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: 12842414 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 v313287_13f.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2012 Check here if Amendment [ ]; Amendment Number: ____________ This Amendment (Check only one.): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: Oberweis Asset Management, Inc. Address: 3333 Warrenville Road, Suite 500 Lisle, IL 60532 Form 13F File Number: 28- 4688 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person signing this Report on Behalf of Reporting Manager: Name: Patrick B. Joyce Title: Executive Vice President Phone: (800) 323-6166 Signature, Place, and Date of Signing: /s/ Patrick B. Joyce Lisle, IL May 14, 2012 ------------------------ ------------------------ ------------------- [Signature] [City, State] [Date] Report Type (Check only one.): [X] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) [ ] 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).) [ ] 13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).) FORM 13F SUMMARY PAGE Report Summary: Number of other Included Managers: _____ Form 13F Information Table Entry Total: 159 Data Records Form 13F Information Table Value Total: $384,623 (thousands) List of Other Included Managers: Provide a numbered list of the name(s) and Form 13F file number (s) of all institutional investment managers with respect to which this report is filed, other than the manger filing this report. [If there are no entries in this list, state "NONE" and omit the column headings and list entries.] NONE FORM 13F INFORMATION TABLE VALUE SHARES/ SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE ------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- -------- 21Vianet Group, Inc. - ADR com 90138A103 7085 624190 SH Sole 458800 165390 3SBio Inc ADR com 88575Y105 577 39000 SH Sole 39000 51Job Inc. ADR com 316827104 4201 73880 SH Sole 58100 15780 ADA-ES, Inc. com 005208103 2608 107300 SH Sole 107300 Abbott Laboratories com 002824100 221 3600 SH Sole 3600 Acacia Research-Acacia Tech com 003881307 17958 430243 SH Sole 346650 83593 Acme Packet, Inc. com 004764106 2372 86195 SH Sole 65200 20995 AdCare Health Systems, Inc. com 00650W300 1282 337586 SH Sole 337586 Advisory Board Co. com 00762w107 1391 15700 SH Sole 11200 4500 Align Technology, Inc. com 016255101 1548 56200 SH Sole 40400 15800 Allot Communications Ltd. com M0854Q105 1409 60600 SH Sole 60600 Amerigon, Inc. com 03070L300 13437 830490 SH Sole 701500 128990 Amgen, Inc. com 031162100 258 3799 SH Sole 3799 Arctic Cat Inc. com 039670104 1192 27827 SH Sole 27827 Aruba Networks Inc. com 043176106 3110 139600 SH Sole 71600 68000 Authentec, Inc. com 052660107 1181 373700 SH Sole 373700 Autonavi Holdings Ltd. ADR com 05330F106 1506 120000 SH Sole 120000 BHP Billiton Ltd. ADR com 088606108 314 4335 SH Sole 4335 Baidu Inc. Spon ADR com 056752108 569 3900 SH Sole 3900 Basic Energy Services, Inc. com 06985P100 984 56700 SH Sole 40700 16000 Berkshire Hills Bk com 084680107 944 41200 SH Sole 29500 11700 Body Central Corp. com 09689U102 8306 286200 SH Sole 286200 Bofi Holding, Inc. com 05566U108 4679 273973 SH Sole 258983 14990 Bona Film Group ADR com 09777B107 126 24200 SH Sole 24200 Broadsoft, Inc. com 11133B409 6260 163650 SH Sole 127000 36650 Bryn Mawr Bank Corp. com 117665109 2428 108200 SH Sole 108200 CPI Aerostructures, Inc. com 125919308 3095 208135 SH Sole 208135 Cai International, Inc. com 12477X106 725 39900 SH Sole 39900 Callon Petroleum Corp. com 13123x102 1399 222400 SH Sole 222400 Cardinal Finl Corp. com 14149F109 1915 169500 SH Sole 167800 1700 Ceva Inc. com 157210105 4393 193450 SH Sole 159500 33950 Changyou.com Ltd. ADR com 15911M107 1901 70000 SH Sole 70000 China Kanghui Holding ADR com 16890V100 2808 147690 SH Sole 146700 990 Cirrus Logic com 172755100 1504 63200 SH Sole 45300 17900 ClearOne Communications, Inc. com 185060100 1278 284000 SH Sole 284000 Clearfield, Inc. com 18482P103 458 84300 SH Sole 84300 Coca-Cola com 191216100 266 3592 SH Sole 3592 Datalink Corp. com 237934104 2118 222500 SH Sole 222500 Datawatch Corp. com 237917208 581 43700 SH Sole 43700 Dealertrack Holdings com 242309102 6029 199240 SH Sole 136000 63240 Digimarc Corp. com 25381B101 3833 137190 SH Sole 117800 19390 Dusa Pharmaceuticals com 266898105 4557 727900 SH Sole 727900 Eagle Bancorp, Inc. com 268948106 1538 91900 SH Sole 91900 Earthstone Energy Inc. com 27032D205 507 23600 SH Sole 23600 Egain Communications Corp. com 28225C806 659 109900 SH Sole 109900 Endologix, Inc. com 29266S106 4511 307900 SH Sole 307900 Eresearch Technology, Inc. com 29481V108 135 17300 SH Sole 17300 Exlservice Holdings com 302081104 3051 111200 SH Sole 76700 34500 Exxon Mobil Corp. com 30231G102 230 2654 SH Sole 2654 Faro Technologies, Inc. com 311642102 4098 70250 SH Sole 48800 21450 Financial Engines, Inc. com 317485100 572 25600 SH Sole 18400 7200 First Savings Financial Group, com 33621E109 655 38300 SH Sole 38300 Flotek Inds Inc. com 343389102 2797 232700 SH Sole 232700 Francescas Holdings Corp. com 351793104 9721 307540 SH Sole 228400 79140 G III Apparel Group Ltd. com 36237H101 3015 106100 SH Sole 96000 10100 General Electric Co. com 369604103 311 15510 SH Sole 15510 Georesources, Inc. com 372476101 8964 273790 SH Sole 246100 27690 Greenway Medical Technologie com 39679B103 2292 150000 SH Sole 150000 Guidance Software com 401692108 905 81900 SH Sole 81900 Gulfport Energy Corp. com 402635304 4361 149750 SH Sole 86200 63550 HMS Holdings Corp. com 40425J101 2982 95560 SH Sole 55100 40460 Hardinge, Inc. com 412324303 1841 194600 SH Sole 194600 Healthstream Inc. com 42222N103 6572 283400 SH Sole 278000 5400 Hercules Offshore com 427093109 61 12800 SH Sole 12800 Hi-Tech Pharmacal com 42840B101 3518 97900 SH Sole 97900 Hisoft Technology Int - Adr com 43358R108 1280 85200 SH Sole 85200 Hurco Companies, Inc. com 447324104 1963 69500 SH Sole 69500 IPC The Hospitalist Co. com 44984A105 2823 76480 SH Sole 76480 IPG Photonics Corp. com 44980X109 4772 91690 SH Sole 50000 41690 Imax Corp. com 45245E109 10360 423875 SH Sole 300100 123775 Impax Laboratories, Inc. com 45256B101 3363 136810 SH Sole 75200 61610 Intel Corporation com 458140100 297 10566 SH Sole 10566 Interactive Intelligence Group com 45841V109 5543 181690 SH Sole 137900 43790 Ishares FTSE China 25 Index com 464287184 1283 35000 SH Sole 35000 JDS Uniphase Corp. com 46612J507 191 13170 SH Sole 8000 5170 JP Morgan Chase & Company Inc. com 46625H100 213 4638 SH Sole 4638 Johnson & Johnson com 478160104 323 4901 SH Sole 4901 Kadant Inc. com 48282T104 1332 55900 SH Sole 55900 Kenexa Corporation com 488879107 8284 265180 SH Sole 204000 61180 Keynote Systems,inc. com 493308100 1024 51800 SH Sole 51800 LGL Group, Inc. com 50186A108 301 41498 SH Sole 41498 Lecroy Corp. com 52324W109 1788 172079 SH Sole 172079 Logmein, Inc. com 54142L109 2375 67410 SH Sole 35100 32310 MWI Vetrinary Supply com 55402X105 616 7000 SH Sole 4900 2100 Magic Software Enterprises Ltd com 559166103 314 48900 SH Sole 48900 Manitex International, Inc. com 563420108 1734 236600 SH Sole 236600 Marine Products Corp. com 568427108 393 66000 SH Sole 66000 Mcdonald's com 580135101 477 4864 SH Sole 4864 Medidata Solutions, Inc. com 58471A105 8045 302000 SH Sole 272100 29900 Mellanox Technologies Ltd. com M51363113 1560 37300 SH Sole 26800 10500 Microsoft Corp. com 594918104 509 15768 SH Sole 15768 Mindspeed Technologies, Inc. com 602682205 103 16200 SH Sole 16200 Mistras Group, Inc. com 60649T107 9076 381030 SH Sole 348800 32230 Mitcham Industries, Inc. com 606501104 3187 141900 SH Sole 141900 Mitek Systems, Inc. com 606710200 2531 218200 SH Sole 218200 Momenta Pharmaceuticals Inc. com 60877T100 492 32100 SH Sole 23100 9000 Multi Color Corp. com 625383104 1306 58000 SH Sole 58000 NQ Mobile, Inc. - ADR com 64118U108 4157 390700 SH Sole 241600 149100 Netease.Com, Inc. com 64110W102 3608 62100 SH Sole 60000 2100 New Oriental Education com 647581107 1648 60000 SH Sole 60000 Northern Oil & Gas, Inc. com 665531109 2095 101000 SH Sole 72400 28600 Omnicell, Inc. com 68213N109 158 10400 SH Sole 10400 On Assignment, Inc. com 682159108 4271 244500 SH Sole 244500 Opentable, Inc. com 68372A104 2795 69055 SH Sole 42500 26555 Openwave Systems, Inc. com 683718308 59 25900 SH Sole 25900 Optical Cable Corp. com 683827208 360 102706 SH Sole 102706 Orasure Technologies com 68554v108 391 34000 SH Sole 24400 9600 Oxford Inds, Inc. com 691497309 1011 19900 SH Sole 16700 3200 Panhandle Oil & Gas Inc. com 698477106 1804 61200 SH Sole 61200 Perficient Inc. com 71375U101 958 79800 SH Sole 79800 Points International Ltd. com 730843208 3072 291500 SH Sole 291500 Polycom Inc com 73172k104 270 14160 SH Sole 8200 5960 Procera Networks, Inc. com 74269U203 2113 94500 SH Sole 94500 Pros Holdings, Inc. com 74346Y103 236 12600 SH Sole 12600 QKL Stores, Inc. com 74732Y105 286 362000 SH Sole 362000 Qihoo 360 Technology Co-ADR com 74734M109 3853 157600 SH Sole 150000 7600 Realpage, Inc. com 75606N109 683 35634 SH Sole 25534 10100 Richmont Mines, Inc. com 76547T106 842 108180 SH Sole 107200 980 Roadrunner Transportation Syst com 76973Q105 2789 160770 SH Sole 87700 73070 Rue21, Inc. com 781295100 1822 62100 SH Sole 44600 17500 SXC Health Solutions Corp. com 78505P100 8671 115680 SH Sole 93700 21980 Select Comfort Corp. com 81616X103 220 6800 SH Sole 6800 Senesco Technologies, Inc com 817208408 13 50000 SH Sole 50000 Silicom Ltd. com M84116108 2396 134300 SH Sole 134300 Sina Corp. com G81477104 3985 61310 SH Sole 47200 14110 Sohu.Com, Inc. com 83408W103 1386 25130 SH Sole 20000 5130 Spreadtrum Communications com 849415203 6004 363854 SH Sole 271700 92154 Stamps Com Inc com 852857200 1444 51800 SH Sole 51800 Stratasys, Inc. com 862685104 1088 29800 SH Sole 21400 8400 Symmetricom com 871543104 893 154700 SH Sole 154700 Synergetics USA, Inc. com 87160G107 164 25200 SH Sole 25200 Syneron Medical ADR com M87245102 1365 127300 SH Sole 127300 Syswin, Inc. com 872058102 48 53400 SH Sole 53400 Taleo Corp. com 87424N104 2054 44720 SH Sole 31800 12920 Tangoe, Inc. com 87582Y108 8255 438840 SH Sole 338400 100440 Taylor Devices, Inc. com 877163105 204 20000 SH Sole 20000 Teavana Holdings, Inc. com 87819P102 2558 129700 SH Sole 113700 16000 Tesco Corp. com 88157K101 478 33700 SH Sole 24200 9500 The Travelers Co., Inc. com 89417E109 256 4326 SH Sole 4326 Titan Machinery, Inc. com 88830R101 1402 49700 SH Sole 35600 14100 Toyota Motor Corp. ADR com 892331307 227 2615 SH Sole 2615 Travelzoo, Inc. com 89421Q106 1088 47300 SH Sole 34000 13300 Twin Disc, Inc. com 901476101 5517 211476 SH Sole 168000 43476 United Financial Bancorp, Inc. com 91030T109 1228 77600 SH Sole 77600 Valueclick, Inc. com 92046N102 1891 95800 SH Sole 70500 25300 Vasco Data Sec com 92230Y104 2270 210400 SH Sole 210400 Vera Bradley, Inc. com 92335C106 3026 100230 SH Sole 56000 44230 Viropharma Inc. com 928241108 2953 98200 SH Sole 69100 29100 Virtusa Corp. com 92827P102 1544 89400 SH Sole 89400 Wal Mart Stores Inc. com 931142103 259 4238 SH Sole 4238 Walgreen Company com 931422109 291 8700 SH Sole 8700 Wayside Technology Group, Inc. com 946760105 828 58300 SH Sole 58300 Web.com Group, Inc. com 94733A104 9532 660550 SH Sole 545900 114650 Wi-Lan Inc. com 928972108 1899 368700 SH Sole 292700 76000 Xata Corp. com 983882309 100 76300 SH Sole 76300 Youku.com com 98742U100 1533 69700 SH Sole 65000 4700 Zebra Technologies Corp.-Cl A com 989207105 218 5300 SH Sole 3300 2000 Zillow, Inc. com 98954A107 1896 53270 SH Sole 37200 16070 Zix Corp. com 98974P100 2198 755300 SH Sole 755300