-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, Fb5eCJvdJJsYpS4pfhbE/0sbSU/q7G8XUcp7A+rCzBIi2LH4bxhcxRZkClTbVXvF He26ELqbmRm+4n3KgL5iYQ== 0001144204-10-027925.txt : 20100517 0001144204-10-027925.hdr.sgml : 20100517 20100517101733 ACCESSION NUMBER: 0001144204-10-027925 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20100331 FILED AS OF DATE: 20100517 DATE AS OF CHANGE: 20100517 EFFECTIVENESS DATE: 20100517 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: 10836191 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 v185115_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: March 31, 2010 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, 2010 - ------------------------ ------------------------ ------------------- [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: 185 Data Records Form 13F Information Table Value Total: $591,217 (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 - ------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- -------- 3SBio Inc ADR com 88575Y105 3499 282609 SH SOLE 282609 51Job Inc. ADR com 316827104 2506 139300 SH SOLE 139300 APAC Customer Services, Inc. com 00185E106 918 159600 SH SOLE 116200 43400 ATMI,Inc. com 00207R101 2223 115100 SH SOLE 97700 17400 Acacia Research-Acacia Tech com 003881307 8733 806360 SH SOLE 587080 219280 Access National Corp. com 004337101 147 24000 SH SOLE 17186 6814 Acme Packet Inc. com 004764106 7512 389650 SH SOLE 319250 70400 Advanced Energy Industry, Inc. com 007973100 1555 93900 SH SOLE 80200 13700 Almost Family, Inc. com 020409108 3452 91600 SH SOLE 70100 21500 Alpha Pro Tech Ltd. com 020772109 1240 527870 SH SOLE 398200 129670 American CareSource Holdings, com 02505A103 230 129770 SH SOLE 93700 36070 American Science & Engr. Inc. com 029429107 2780 37100 SH SOLE 31400 5700 American Superconductor com 030111108 9056 313362 SH SOLE 265780 47582 Amerigon, Inc. com 03070L300 4850 480650 SH SOLE 353500 127150 Andatee China Marine Fuel SE com 67086W105 786 123600 SH SOLE 123600 Anika Therapeutics, Inc. com 035255108 895 125900 SH SOLE 97700 28200 Arcsight, Inc. com 039666102 15588 553735 SH SOLE 423390 130345 Arena Resources, Inc. com 040049108 3890 116480 SH SOLE 91180 25300 Art Technology Group Inc. com 04289L107 2362 535600 SH SOLE 436100 99500 Aruba Networks Inc. com 043176106 2108 154300 SH SOLE 130800 23500 AsiaInfo com 04518A104 15129 571347 SH SOLE 514250 57097 Athena Health, Inc. com 04685W103 2356 64430 SH SOLE 47370 17060 Atwood Oceanics, Inc. com 050095108 1669 48200 SH SOLE 40900 7300 Axcelis Technologies com 054540109 179 107800 SH SOLE 107800 BHP Billiton Ltd. ADR com 088606108 287 3578 SH SOLE 3578 Baidu Inc. Spon ADR com 056752108 1040 1742 SH SOLE 186 1556 Barrett Bill Corp. com 06846N104 1247 40600 SH SOLE 34600 6000 Blackboard com 091935502 1946 46700 SH SOLE 39400 7300 Bofi Holding, Inc. com 05566U108 4037 289783 SH SOLE 224883 64900 Boots & Coots International com 099469504 1307 537800 SH SOLE 409600 128200 Brooks Automation Inc. com 114340102 1551 175800 SH SOLE 149300 26500 CPI Aerostructures, Inc. com 125919308 826 103760 SH SOLE 75335 28425 CTRIP Com Int'l Ltd ADR com 22943F100 3379 86200 SH SOLE 84200 2000 Cabot Microelectronics Corp. com 12709p103 3287 86900 SH SOLE 73300 13600 Carrizo Oil & Gas, Inc. com 144577103 5687 247821 SH SOLE 174737 73084 Catalyst Health Solutions, Inc com 14888B103 1960 47373 SH SOLE 40173 7200 Cavium Networks, Inc. com 14965A101 2055 82600 SH SOLE 70500 12100 Central European Distribution com 153435102 2418 69073 SH SOLE 57020 12053 Changyou.com Ltd. ADR com 15911M107 2426 78780 SH SOLE 78780 China Advanced Construction com 169365103 1007 195600 SH SOLE 195600 China Cord Blood Corp. com G21107100 1937 322900 SH SOLE 322900 China Distance Educ Hldgs Ltd com 16944W104 1242 209400 SH SOLE 209400 China Education Alliance, Inc. com 16938Y207 208 38900 SH SOLE 38900 China Electric Motor, Inc. com 16890A205 1883 365000 SH SOLE 365000 China Fire & Security Group com 16938R103 551 42500 SH SOLE 42500 China Green Agriculture, Inc. com 16943W105 2841 202900 SH SOLE 183500 19400 China Grentech Corp. Ltd. ADR com 16938P107 46 12000 SH SOLE 12000 China Integrated Energy com 16948P105 210 20000 SH SOLE 20000 China Marine Food Group Ltd. com 16943R106 1485 241600 SH SOLE 241600 China Nuokang Bio-Ph-Sp ADR com 16949B113 1146 184900 SH SOLE 184900 China Real Estate Information com 16948Q103 2273 226800 SH SOLE 226800 China Transinfo Technology com 169453107 2533 375800 SH SOLE 375800 China Valves Technology, Inc. com 169476207 4292 329918 SH SOLE 329918 China XD Plastics Co. Ltd com 16948F107 2433 388587 SH SOLE 388587 China-Biotics, Inc. com 16937B109 3575 199600 SH SOLE 199600 Chinacast Education Corp. com 16946T109 4741 648600 SH SOLE 648600 Cirrus Logic com 172755100 2898 345380 SH SOLE 250300 95080 Cisco Systems, Inc. com 17275R102 278 10677 SH SOLE 10677 Citi Trends, Inc. com 17306X102 1551 47800 SH SOLE 36400 11400 Clicksoftware Technologies Ltd com M25082104 7031 1019025 SH SOLE 701780 317245 Cninsure, Inc com 18976M103 6402 240600 SH SOLE 194200 46400 Conceptus Inc. com 206016107 1870 93700 SH SOLE 79500 14200 Concord Medical Spon ADR com 206277105 1989 292000 SH SOLE 292000 Conmed Healthcare Management com 20741M103 855 267200 SH SOLE 207300 59900 Constant Contact, Inc. com 210313102 1735 74550 SH SOLE 62900 11650 Craft Brewers Alliance, Inc. com 224122101 346 139600 SH SOLE 107200 32400 Cybersource Corp com 23251J106 1004 56870 SH SOLE 44400 12470 DG Fastchannel, Inc. com 23326r109 16448 514820 SH SOLE 397720 117100 Double Eagle Petroleum com 258570209 821 193200 SH SOLE 148900 44300 Dragonwave, Inc. com 26144M103 3125 337800 SH SOLE 231650 106150 Duoyuan Global Water, Inc. ADR com 266043108 4260 153400 SH SOLE 153400 Duoyuan Printing, Inc. com 26605B109 2780 257400 SH SOLE 257400 Dyax Corp. com 26746e103 61 17800 SH SOLE 17800 E-House China Holdings-ADS com 26852W103 7524 395374 SH SOLE 367580 27794 Ebix Inc. com 278715206 1842 115405 SH SOLE 85300 30105 Ecology and Environment, Inc. com 278878103 1624 115800 SH SOLE 89045 26755 Egain Communications Corp. com 28225C806 156 169600 SH SOLE 125600 44000 Emergent Group, Inc. com 29089V203 2243 286500 SH SOLE 214500 72000 Endologix, Inc. com 29266S106 1790 443100 SH SOLE 343700 99400 Enernoc, Inc. com 292764107 1914 64500 SH SOLE 54600 9900 Entropic Communications, Inc. com 29384R105 2863 563500 SH SOLE 437400 126100 Female Health Company com 314462102 5949 829700 SH SOLE 643100 186600 Finisar Corp. com 31787A507 1808 115500 SH SOLE 97900 17600 Full House Resorts, Inc. com 359678109 69 23900 SH SOLE 23900 G III Apparel Group Ltd. com 36237H101 5203 188800 SH SOLE 145000 43800 GLG Life Tech Corporation com 361793201 1036 131200 SH SOLE 101800 29400 GMX Resources Inc com 38011M108 1171 142476 SH SOLE 110688 31788 GSE Systems com 36227K106 7146 1320950 SH SOLE 994890 326060 General Electric Co. com 369604103 215 11803 SH SOLE 11803 Genoptix Inc. com 37243V100 7344 206920 SH SOLE 167300 39620 Geoeye, Inc. com 37250W108 2390 81000 SH SOLE 68300 12700 Georesources Inc. com 372476101 3900 255400 SH SOLE 199000 56400 Grand Canyon Education, Inc. com 38526M106 10316 394646 SH SOLE 315776 78870 Green Mtn Coffee com 393122106 7982 82404 SH SOLE 63305 19099 Gulf Resources, Inc. com 40251W309 794 68400 SH SOLE 68400 HMS Holdings Corp. com 40425J101 3786 74250 SH SOLE 61900 12350 Harbin Electric, Inc. com 41145W109 1688 78200 SH SOLE 78200 Health Grades Inc com 42218q102 4804 755400 SH SOLE 581900 173500 Herley Industries, Inc. com 427398102 6081 414800 SH SOLE 323500 91300 Hi-Tech Pharmacal com 42840B101 4138 186900 SH SOLE 144800 42100 Hollysis Automation com G45667105 2637 228900 SH SOLE 228900 Home Inns & Hotels Mgmt com 43713W107 13526 413140 SH SOLE 380310 32830 Human Genome Science com 444903108 3667 121410 SH SOLE 73100 48310 ICF International Inc. com 44925C103 2799 112700 SH SOLE 87200 25500 IPC The Hospitalist Co. com 44984A105 7103 202300 SH SOLE 162180 40120 Illumina Inc com 452327109 894 22986 SH SOLE 2569 20417 Imax Corp. com 45245e109 13468 748630 SH SOLE 611930 136700 Impax Laboratories, Inc. com 45256B101 7808 436670 SH SOLE 342850 93820 Infospace Inc Com New com 45678t300 4683 423800 SH SOLE 328500 95300 Insituform Technology com 457667103 3938 148000 SH SOLE 125900 22100 Integrated Silicon Solution com 45812p107 1377 130500 SH SOLE 101400 29100 Intellicheck Mobilisa Inc. com 45817G102 783 355704 SH SOLE 273104 82600 Ista Pharmaceuticals, Inc. com 45031X204 2981 732500 SH SOLE 570900 161600 Johnson & Johnson com 478160104 221 3394 SH SOLE 3394 Kit Digital, Inc. com 482470200 2781 215900 SH SOLE 167600 48300 Kulicke & Soffa Inds, Inc. com 501242101 4386 604970 SH SOLE 510200 94770 Kvh Industries, Inc. com 482738101 7719 585200 SH SOLE 430100 155100 Lasercard Corp com 51807U101 1807 287300 SH SOLE 213200 74100 Leapfrog Enterprises, Inc. com 52186n106 2526 385600 SH SOLE 299500 86100 Lincoln EDL Svcs com 533535100 4820 190510 SH SOLE 146440 44070 Liveperson, Inc. com 538146101 3109 405400 SH SOLE 306900 98500 Logmein, Inc. com 54142L109 3254 157250 SH SOLE 117980 39270 Longtop Financial Techno ADR com 54318P108 9492 294677 SH SOLE 280025 14652 Maxwell Technologies, Inc. com 577767106 826 66700 SH SOLE 51800 14900 Mcdonald's com 580135101 260 3900 SH SOLE 3900 Medidata Solutions, Inc. com 58471A105 6718 442000 SH SOLE 349500 92500 Mellanox Technologies Ltd. com M51363113 1150 48800 SH SOLE 41400 7400 Microsoft Corp. com 594918104 484 16520 SH SOLE 16520 Micrus Endovascular Corp. com 59518V102 1495 75800 SH SOLE 58800 17000 Multiband Corp. com 62544X209 527 262200 SH SOLE 197827 64373 NCI Inc-Class A com 62886K104 2896 95800 SH SOLE 73500 22300 NVE Corp. com 629445206 4050 89400 SH SOLE 67800 21600 Nanometrics, Inc. com 630077105 5595 590190 SH SOLE 455600 134590 Neptune Tech & Bioressources com 64077P108 301 151900 SH SOLE 116000 35900 Netgear, Inc. com 64111Q104 1911 73200 SH SOLE 62100 11100 Netlogic Microsystems com 64118B100 5891 200160 SH SOLE 166800 33360 Nova Measuring Instruments com M7516K103 1322 241300 SH SOLE 168800 72500 Nuvasive com 670704105 3275 72465 SH SOLE 61400 11065 Opentable, Inc. com 68372A104 8058 211320 SH SOLE 177610 33710 Orient Paper, Inc. com 68619F205 1151 137900 SH SOLE 137900 Orion Marine Group, Inc. com 68628V308 1238 68600 SH SOLE 58100 10500 Orthovita, Inc. com 68750U102 81 19000 SH SOLE 19000 PLX Technology Inc. com 693417107 1875 355700 SH SOLE 281100 74600 Panhandle Oil & Gas Inc. com 698477106 2207 93400 SH SOLE 71900 21500 Pegasystems Inc. com 705573103 3147 85050 SH SOLE 63040 22010 Perfect World ADR com 71372U104 5558 148400 SH SOLE 133400 15000 Permafix Environmental Service com 714157104 6317 2819870 SH SOLE 2136900 682970 Providence Svc Corp. com 743815102 1173 77200 SH SOLE 60800 16400 QKL Stores, Inc. com 74732Y105 6713 1040820 SH SOLE 916300 124520 Real Goods Solar Inc. - Class com 75601N104 721 211400 SH SOLE 163900 47500 Relm Wireless Corp. com 759525108 1473 394900 SH SOLE 306700 88200 Richmont Mines, Inc. com 76547T106 2489 627000 SH SOLE 468900 158100 Rino International Corp. com 766883102 2819 118800 SH SOLE 73500 45300 Rudolph Tech., Inc. com 781270103 1780 207000 SH SOLE 160700 46300 Rue21, Inc. com 781295100 3377 97400 SH SOLE 82600 14800 SXC Health Solutions Corp. com 78505P100 8262 122800 SH SOLE 107100 15700 Scientific Learning Corp. com 808760102 1850 385400 SH SOLE 298800 86600 Sharps Compliance Corp. com 820017101 1296 198195 SH SOLE 151818 46377 Sinovac Biotech, Ltd. com P8696W104 1051 177800 SH SOLE 169800 8000 Sourcefire, Inc. com 83616T108 8560 373002 SH SOLE 282090 90912 Spongetech Delivery Systems com 849109103 4 100000 SH SOLE 100000 Spreadtrum Communications com 849415203 2375 424800 SH SOLE 424800 Spypeople Fruit Juice, Inc. com 83086T208 1471 245500 SH SOLE 245500 Srs Labs, Inc. com 78464M106 2845 286200 SH SOLE 221800 64400 Summer Infant, Inc. com 865646103 2516 382300 SH SOLE 279800 102500 Super Micro Computer Inc. com 86800U104 1560 90300 SH SOLE 76600 13700 T 3 Energy Services, Inc. com 87306e107 2893 117800 SH SOLE 90900 26900 Taser International, Inc. com 87651B104 453 77200 SH SOLE 65500 11700 Techwell, Inc. com 87874D101 1015 54300 SH SOLE 42200 12100 Telecommunication Systems com 87929J103 4246 578500 SH SOLE 453400 125100 Thoratec Corp. com 885175307 5486 164000 SH SOLE 131080 32920 Tongxin International Ltd. com G8918T103 2511 337000 SH SOLE 337000 Transcend Services, Inc. com 893929208 1367 84100 SH SOLE 64200 19900 True Religion Apparel Inc. com 89784N104 10511 346200 SH SOLE 279600 66600 Ultra Clean Holdings com 90385V107 1390 162900 SH SOLE 126500 36400 Utstarcom, Inc. com 918076100 113 40400 SH SOLE 20400 20000 Vanceinfo Technologies com 921564100 6140 275475 SH SOLE 259375 16100 Viasat Inc. com 92552V100 2146 62000 SH SOLE 52500 9500 Volterra Semiconductor com 928708106 2678 106700 SH SOLE 90900 15800 Walgreen Company com 931422109 323 8700 SH SOLE 8700 Wave Systems Corp. com 943526301 2663 665815 SH SOLE 515800 150015 Wonder Auto Technology, Inc. com 978166106 4213 398214 SH SOLE 398214 Xata Corp. com 983882309 1254 353100 SH SOLE 261000 92100 Xyratex Ltd. com G98268108 3266 192900 SH SOLE 57000 135900 Yongye International, Inc. com 98607B106 5353 662500 SH SOLE 622900 39600
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