OBERWEIS ASSET MANAGEMENT INC/ Information

3333 WARRENVILLE ROAD, LISLE, Illinois, 60532, (630) 577-2300

Report Date: 03/31/2013

Position Statistics:

Total Positions 168
New Positions 19
Increased Positions 51
Decreased Positions 87
Positions with Activity 138
Sold Out Positions 24
Total Mkt Value
(in $ millions)
351

Sector Weighting

Basic Materials 0.5%
Capital Goods 0.55%
Conglomerates
Consumer Cyclical 3.67%
Consumer/Non-Cyclical 0.15%
Energy 5.34%
Financial 11.05%
Healthcare 5.03%
Services 27.46%
Technology 44.14%
Transportation 2.1%
Utilities

Institutional Holdings information is filed by major institutions on form 13-F with the Securities and Exchange Commission.

168 Positions as of 03/31/2013

Company Class Value of Shares ($1,000s) Change in Value ($1,000s) Change (%) Shares Held
21VIANET GROUP INC SPONSORED ADR 8,990 -1,206 (11.83) 942,346
51JOB INC SP ADR REP COM 2,930 -206 (6.58) 48,280
8X8 INC NEW COM 1,361 170 14.31 171,000
ABBOTT LABS COM -135 Sold Out 0
ABBVIE INC COM -168 Sold Out 0
ACACIA RESH CORP ACACIA TCH COM 13,205 -544 (3.96) 561,453
ACCESS NATL CORP COM 159 New 12,700
ACQUITY GROUP LTD SPONSORED ADR 1,353 234 20.89 105,900
ADA ES INC COM 835 -129 (13.33) 24,700
ADCARE HEALTH SYSTEMS INC COM NEW 432 New 91,031
ADVISORY BRD CO COM 5,276 -1,268 (19.38) 105,130
ALLOT COMMUNICATIONS LTD SHS 310 New 25,400
AMGEN INC COM 356 -35 (8.97) 3,369
APPLE INC COM 283 283 New 641
ARCTIC CAT INC COM 485 -354 (42.22) 10,400
ARUBA NETWORKS INC COM 235 -85 (26.56) 17,700
AUTONAVI HLDGS LTD SPONSORED ADR -1,500 Sold Out 0
AVG TECHNOLOGIES N V SHS 7,927 7,264 1,094.74 450,418
BANCORP INC DEL COM 1,013 1,013 New 72,900
BARRETT BUSINESS SERVICES INC COM 1,700 New 29,888

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