DRIEHAUS CAPITAL MANAGEMENT LLC Information

25 EAST ERIE ST, CHICAGO, Illinois, 60611, (312) 587-3800

Report Date: 03/31/2013

Position Statistics:

Total Positions 578
New Positions 132
Increased Positions 235
Decreased Positions 336
Positions with Activity 571
Sold Out Positions 140
Total Mkt Value
(in $ millions)
2,113

Sector Weighting

Basic Materials 3.97%
Capital Goods 6.41%
Conglomerates 1.96%
Consumer Cyclical 6.21%
Consumer/Non-Cyclical 3.83%
Energy 12.22%
Financial 5.24%
Healthcare 13.13%
Services 21.2%
Technology 19.05%
Transportation 2.96%
Utilities 3.79%

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

336 DECREASED Positions as of 03/31/2013

Company Class Value of Shares ($1,000s) Change in Value ($1,000s) Change (%) Shares Held
ABERCROMBIE & FITCH CO CL A -2,870 Sold Out 0
ACELRX PHARMACEUTICALS INC COM 2,067 -1,312 (38.83) 208,393
ACUITY BRANDS INC COM 2,767 -5,341 (65.88) 35,998
AFC ENTERPRISES INC COM 1,502 -1,771 (54.11) 43,518
AFFYMAX INC COM -54 Sold Out 0
AIR LEASE CORP CL A -320 Sold Out 0
AIR METHODS CORP COM PAR $.06 4,337 -6,988 (61.71) 110,233
ALASKA AIR GROUP INC COM -7,656 Sold Out 0
ALEXION PHARMACEUTICALS INC COM 6,727 -4,613 (40.68) 73,664
ALLEGHENY TECHNOLOGIES INC COM -303 Sold Out 0
ALLERGAN INC COM 4,530 -2,405 (34.68) 44,644
ALON USA ENERGY INC COM 3,263 -97 (2.89) 195,033
ALON USA PARTNERS LP UT LTDPART INT 12,891 -254 (1.93) 497,739
ALTERA CORP COM -3,661 Sold Out 0
ALTISOURCE PORTFOLIO SOLNS SA REG SHS -1,335 Sold Out 0
AMC NETWORKS INC CL A -790 Sold Out 0
AMERICAN EAGLE OUTFITTERS NEW COM -503 Sold Out 0
AMERICAN RAILCAR INDS INC COM -3,670 Sold Out 0
AMERICAN TOWER CORP NEW COM -7,450 Sold Out 0
AMERICAN VANGUARD CORP COM -4,310 Sold Out 0