0001144204-11-046647.txt : 20110815 0001144204-11-046647.hdr.sgml : 20110815 20110815110614 ACCESSION NUMBER: 0001144204-11-046647 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20110630 FILED AS OF DATE: 20110815 DATE AS OF CHANGE: 20110815 EFFECTIVENESS DATE: 20110815 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: 111034042 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 v232164_13fhr.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: June 30, 2011 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 August 15, 2011 ------------------------ ------------------------ ------------------- [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: 198 Data Records Form 13F Information Table Value Total: $462,100 (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 2061 150000 SH Sole 150000 3D Systems Corp. com 88554D205 1360 69000 SH Sole 51600 17400 3SBio Inc ADR com 88575Y105 1394 80000 SH Sole 80000 51Job Inc. ADR com 316827104 5472 97480 SH Sole 90800 6680 ADA-ES, Inc. com 005208103 2357 147400 SH Sole 147400 Acacia Research-Acacia Tech com 003881307 18953 516565 SH Sole 423360 93205 Acme Packet, Inc. com 004764106 820 11690 SH Sole 9390 2300 Active Power, Inc. com 00504W100 5106 2084150 SH Sole 1849400 234750 AdCare Health Systems, Inc. com 00650W300 1858 297255 SH Sole 297255 Advanced Energy Industry, Inc. com 007973100 1901 128500 SH Sole 96100 32400 Akorn Inc. com 009728106 77 11000 SH Sole 11000 Align Technology, Inc. com 016255101 848 37200 SH Sole 28000 9200 Alliance Fiber Optic Products com 018680306 1044 123400 SH Sole 123400 Allied Motion Technologies com 019330109 185 33900 SH Sole 33900 Almost Family, Inc. com 020409108 1247 45500 SH Sole 45500 Ambow Education Holding ADR com 02322P101 580 112200 SH Sole 112200 Ameresco, Inc. com 02361E108 820 57800 SH Sole 43500 14300 American Xtal Technology com 00246W103 1141 134500 SH Sole 134500 Amerigon, Inc. com 03070L300 15509 892330 SH Sole 753900 138430 Amgen, Inc. com 031162100 221 3795 SH Sole 3795 Amtech Systems, Inc. com 032332504 3154 152800 SH Sole 152800 Aruba Networks Inc. com 043176106 5553 187920 SH Sole 107500 80420 Autonavi Holdings Ltd. ADR com 05330F106 1782 120000 SH Sole 120000 BHP Billiton Ltd. ADR com 088606108 412 4355 SH Sole 4355 Baidu Inc. Spon ADR com 056752108 476 3400 SH Sole 3400 Barnwell Industries, Inc. com 068221100 448 86900 SH Sole 86900 Barrett Bill Corp. com 06846N104 1112 24000 SH Sole 18000 6000 Blackboard com 091935502 2321 53500 SH Sole 39800 13700 Body Central Corp. com 09689U102 4475 190200 SH Sole 190200 Bofi Holding, Inc. com 05566U108 4357 302353 SH Sole 286733 15620 Broadsoft, Inc. com 11133B409 6547 171710 SH Sole 125100 46610 Brooks Automation Inc. com 114340102 967 89000 SH Sole 65900 23100 Bryn Mawr Bank Corp. com 117665109 2302 113700 SH Sole 113700 Bsquare Corp. com 11776U300 2149 342800 SH Sole 342800 CPI Aerostructures, Inc. com 125919308 2128 156135 SH Sole 156135 CRA Int'l Inc. com 12618T105 1571 58000 SH Sole 58000 Cai International, Inc. com 12477X106 866 41900 SH Sole 41900 Cardinal Finl Corp. com 14149F109 1961 179100 SH Sole 177400 1700 Caribou Coffee Co., Inc. com 142042209 134 10100 SH Sole 10100 Carrizo Oil & Gas, Inc. com 144577103 7492 179458 SH Sole 126564 52894 Ceragon Networks ADR com M22013102 1552 130500 SH Sole 130500 Ceva Inc. com 157210105 883 29000 SH Sole 21600 7400 Changyou.com Ltd. ADR com 15911M107 3082 70000 SH Sole 70000 Charm Communications, Inc. com 16112R101 1289 108300 SH Sole 108300 Chase Corp. com 16150R104 1048 62500 SH Sole 62500 China Kanghui Holding ADR com 16890V100 3541 150990 SH Sole 150000 990 Cirrus Logic com 172755100 187 11500 SH Sole 11500 ClearOne Communications, Inc. com 185060100 1489 227000 SH Sole 227000 Coca-Cola com 191216100 242 3590 SH Sole 3590 Cognex Corp. com 192422103 4616 130298 SH Sole 80160 50138 Concord Medical Spon ADR com 206277105 399 94300 SH Sole 94300 Conmed Healthcare Management com 20741M103 1050 287700 SH Sole 287700 Constant Contact, Inc. com 210313102 2182 85970 SH Sole 47700 38270 DG Fastchannel, Inc. com 23326R109 2324 72500 SH Sole 54000 18500 Datalink Corp. com 237934104 1604 230800 SH Sole 230800 Dealertrack Holdings com 242309102 1786 77820 SH Sole 56500 21320 Digimarc Corp. com 25381B101 2806 80100 SH Sole 80100 Dusa Pharmaceuticals com 266898105 6844 1100325 SH Sole 955300 145025 EPlus, Inc. com 294268107 865 32700 SH Sole 32700 Egain Communications Corp. com 28225C806 335 113600 SH Sole 113600 Electro Rent Corp. com 285218103 974 56900 SH Sole 56900 Electronics For Imaging Inc. com 286082102 2297 133390 SH Sole 80000 53390 Endologix, Inc. com 29266S106 3544 381100 SH Sole 381100 Entropic Communications, Inc. com 29384R105 1603 180300 SH Sole 180300 Exlservice Holdings com 302081104 2185 94600 SH Sole 70700 23900 Exxon Mobil Corp. com 30231G102 205 2513 SH Sole 2513 Faro Technologies, Inc. com 311642102 3751 85650 SH Sole 62300 23350 First Savings Financial Group, com 33621E109 606 38500 SH Sole 38500 G III Apparel Group Ltd. com 36237H101 9622 278900 SH Sole 256200 22700 GSE Systems com 36227K106 568 263000 SH Sole 263000 GSI Technology, Inc. com 36241U106 695 96500 SH Sole 96500 General Electric Co. com 369604103 280 14860 SH Sole 14860 Georesources, Inc. com 372476101 5258 233800 SH Sole 232600 1200 Green Mtn Coffee com 393122106 1322 14810 SH Sole 2690 12120 Gulfport Energy Corp. com 402635304 5104 171920 SH Sole 107800 64120 HMS Holdings Corp. com 40425J101 1995 25950 SH Sole 18800 7150 Hardinge, Inc. com 412324303 982 90000 SH Sole 90000 Healthstream Inc. com 42222n103 2686 202400 SH Sole 202400 Hi-Tech Pharmacal com 42840B101 4044 139800 SH Sole 139800 Higher One Holdings, Inc. com 42983D104 1427 75400 SH Sole 54300 21100 Home Inns & Hotels Mgmt com 43713W107 5796 152365 SH Sole 129780 22585 Hurco Companies, Inc. com 447324104 1156 35900 SH Sole 35900 ICF International, Inc. com 44925C103 1117 44000 SH Sole 44000 II-VI Inc. com 902104108 3185 124400 SH Sole 92800 31600 IPC The Hospitalist Co. com 44984A105 3828 82680 SH Sole 82680 IPG Photonics Corp com 44980X109 6217 85510 SH Sole 48700 36810 IROBOT Corp com 462726100 3747 106190 SH Sole 60890 45300 Illumina, Inc. com 452327109 416 5540 SH Sole 5540 Imax Corp. com 45245E109 10654 328535 SH Sole 232090 96445 Impax Laboratories, Inc. com 45256B101 3622 166210 SH Sole 100670 65540 Imris, Inc. com 45322N105 4949 724650 SH Sole 666400 58250 Intel Corporation com 458140100 253 11414 SH Sole 11414 Interactive Intelligence Group com 45841V109 5438 155150 SH Sole 107100 48050 Ista Pharmaceuticals, Inc. com 45031X204 3774 493700 SH Sole 493700 Ixia com 45071R109 1143 89300 SH Sole 66700 22600 Ixys Corporation com 46600W106 4385 292700 SH Sole 292700 Jinkosolar Holding Co. ADR com 47759T100 1326 50000 SH Sole 50000 Johnson & Johnson com 478160104 329 4948 SH Sole 4948 KSW, Inc. com 48268R106 407 103900 SH Sole 103900 Kadant Inc. com 48282T104 2984 94700 SH Sole 94700 Kemet Corporation com 488360207 5982 418591 SH Sole 393451 25140 Kenexa Corporation com 488879107 2168 90400 SH Sole 68000 22400 Kopin Corporation com 500600101 682 144900 SH Sole 144900 Kraton Performance Polymers com 50077C106 1725 44040 SH Sole 33940 10100 LGL Group, Inc. com 50186A108 1412 142800 SH Sole 142800 LML Payment Systems, Inc. com 50208P109 1261 321600 SH Sole 321600 LSB Industries, Inc. com 502160104 807 18800 SH Sole 14100 4700 Lecroy Corp. com 52324W109 2586 214800 SH Sole 214800 Logmein, Inc. com 54142L109 3758 97440 SH Sole 60130 37310 Lydall, Inc. com 550819106 3494 292100 SH Sole 292100 MWI Vetrinary Supply com 55402X105 1510 18700 SH Sole 14000 4700 Magic Software Enterprises Ltd com 559166103 321 64400 SH Sole 64400 Manitex International, Inc. com 563420108 1235 223700 SH Sole 223700 Mastech Holdings, Inc. com 57633B100 110 32300 SH Sole 32300 Materion Corp. com 576690101 3488 94360 SH Sole 61700 32660 Mcdonald's com 580135101 410 4861 SH Sole 4861 Measurement Specialties Inc. com 583421102 4975 139360 SH Sole 120000 19360 Medidata Solutions, Inc. com 58471A105 8004 335300 SH Sole 301800 33500 Microsoft Corp. com 594918104 404 15520 SH Sole 15520 Mistras Group, Inc. com 60649T107 4613 284730 SH Sole 280300 4430 Mitcham Industries, Inc. com 606501104 2097 121200 SH Sole 121200 Mitek Systems, Inc. com 606710200 2517 349530 SH Sole 343200 6330 Momenta Pharmaceuticals Inc. com 60877T100 965 49600 SH Sole 38600 11000 NN, Inc. com 629337106 688 46000 SH Sole 46000 Nanometrics, Inc. com 630077105 2438 128390 SH Sole 124200 4190 National American University H com 63245Q105 1736 184500 SH Sole 184500 Natus Med, Inc. com 639050103 967 63860 SH Sole 46000 17860 Netease.Com, Inc. com 64110W102 3607 80000 SH Sole 80000 Netgear, Inc. com 64111Q104 3602 82390 SH Sole 68400 13990 Netqin Mobile, Inc. - ADR com 64118U108 441 80100 SH Sole 70100 10000 New Oriental Education com 647581107 1754 15700 SH Sole 15700 Newport Corp. com 651824104 1221 67200 SH Sole 50100 17100 Northern Oil & Gas, Inc. com 665531109 2875 129800 SH Sole 97100 32700 Omnicell, Inc. com 68213N109 176 11300 SH Sole 11300 Omnivision Technologies, Inc. com 682128103 895 25700 SH Sole 19200 6500 On Assignment, Inc. com 682159108 2045 208000 SH Sole 208000 Opentable, Inc. com 68372A104 6483 77995 SH Sole 57780 20215 Oplink Communications, Inc. com 68375Q403 1761 94600 SH Sole 94600 Optical Cable Corp. com 683827208 595 147000 SH Sole 147000 Orbit\FR Inc. com 685929101 138 62600 SH Sole 62600 Panhandle Oil & Gas Inc. com 698477106 1881 63800 SH Sole 63800 Perceptron Inc. com 71361F100 336 52800 SH Sole 52800 Perry Ellis International, Inc com 288853104 205 8100 SH Sole 8100 Points International Ltd. com 730843208 1804 181300 SH Sole 181300 Polycom Inc com 73172k104 228 3550 SH Sole 3550 Power-One, Inc. com 73930R102 95 11600 SH Sole 11600 Primo Water Corp. com 74165N105 2206 153300 SH Sole 153300 QKL Stores, Inc. com 74732Y105 808 398200 SH Sole 363700 34500 RDA Microelectronics com 749394102 1349 150000 SH Sole 150000 Raven Inds, Inc. com 754212108 808 14500 SH Sole 10800 3700 Real Goods Solar Inc. - Class com 75601N104 101 33650 SH Sole 33650 RealD, Inc. com 75604L105 1300 55600 SH Sole 41000 14600 Realpage, Inc. com 75606N109 1395 52704 SH Sole 40164 12540 Richmont Mines, Inc. com 76547T106 1468 206500 SH Sole 204300 2200 Rightnow Tech Inc. com 76657r106 5172 159620 SH Sole 109400 50220 Rogers Corp. com 775133101 1377 29800 SH Sole 22400 7400 Rubicon Technology, Inc. com 78112T107 1518 90060 SH Sole 58800 31260 Rue21, Inc. com 781295100 2464 75800 SH Sole 56300 19500 SXC Health Solutions Corp. com 78505P100 8299 140850 SH Sole 110000 30850 Sagent Technology, Inc. com 786692103 1505 55775 SH Sole 41500 14275 Select Comfort Corp. com 81616X103 192 10700 SH Sole 10700 Senesco Technologies, Inc com 817208408 14 50000 SH Sole 50000 Silicom Ltd. com M84116108 1424 71200 SH Sole 71200 Silicon Graphics International com 82706L108 1395 81100 SH Sole 81100 Silicon Image, Inc. com 82705T102 835 129300 SH Sole 97300 32000 Sina Corp Ord com G81477104 5436 52215 SH Sole 43400 8815 Sinotech Energy, Ltd. ADR com 829359108 414 100000 SH Sole 100000 Sohu.Com, Inc. com 83408W103 2956 40900 SH Sole 40000 900 Soufun Holdings Ltd ADR com 836034108 2273 110000 SH Sole 110000 Spongetech Delivery Systems, I com 849109103 0 890000 SH Sole 890000 Spreadtrum Communications com 849415203 6557 416024 SH Sole 353369 62655 Summer Infant, Inc. com 865646103 1376 169500 SH Sole 169500 Sun Hydraulics com 866942105 2232 46700 SH Sole 34700 12000 Syswin, Inc. com 872058102 939 317200 SH Sole 317200 TII Network Technologies, Inc. com 872479209 650 273000 SH Sole 273000 Tal Education Group ADR com 874080104 827 76200 SH Sole 76200 Taleo Corp. com 87424N104 2607 70390 SH Sole 51400 18990 Tesco Corp. com 88157K101 823 42400 SH Sole 31900 10500 The Travelers Co., Inc. com 89417E109 244 4179 SH Sole 4179 Titan Machinery, Inc. com 88830R101 1836 63800 SH Sole 47900 15900 Toyota Motor Corp ADR com 892331307 223 2711 SH Sole 2711 Travelzoo, Inc. com 89421Q106 2243 34700 SH Sole 26000 8700 Twin Disc, Inc. com 901476101 9690 250851 SH Sole 202400 48451 Unify Corp. com 904743200 368 197827 SH Sole 197827 United Financial Bancorp, Inc. com 91030T109 1202 77900 SH Sole 77900 Vera Bradley, Inc. com 92335C106 4590 120170 SH Sole 73300 46870 Viropharma Inc. com 928241108 2805 151600 SH Sole 111600 40000 Virtusa Corp. com 92827P102 1760 92900 SH Sole 92900 Wal Mart Stores Inc. com 931142103 225 4230 SH Sole 4230 Walgreen Company com 931422109 369 8700 SH Sole 8700 Wayside Technology Group, Inc. com 946760105 767 56600 SH Sole 56600 Web.com Group, Inc. com 94733A104 7838 636240 SH Sole 503200 133040 Wi-Lan Inc. com 928972108 4926 610440 SH Sole 437100 173340 Xata Corp. com 983882309 156 82000 SH Sole 82000 Zebra Technologies Corp.-Cl A com 989207105 253 6000 SH Sole 4000 2000 Zix Corp. com 98974P100 3618 942200 SH Sole 910100 32100 eMagin Corporation com 29076N206 1388 228700 SH Sole 228700 iSoftStone Holdings Ltd. com 46489B108 1225 80000 SH Sole 80000