BLAIR WILLIAM & CO/IL Information

222 WEST ADAMS ST, CHICAGO, Illinois, 60606-5312, (312) 236-1600

Report Date: 03/31/2013

Position Statistics:

Total Positions 1,501
New Positions 159
Increased Positions 723
Decreased Positions 650
Positions with Activity 1,373
Sold Out Positions 130
Total Mkt Value
(in $ millions)
24,582

Sector Weighting

Basic Materials 4.52%
Capital Goods 5.21%
Conglomerates 0.94%
Consumer Cyclical 5.47%
Consumer/Non-Cyclical 6.99%
Energy 6.37%
Financial 16.71%
Healthcare 9.41%
Services 22.03%
Technology 17.17%
Transportation 4.19%
Utilities 0.65%

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

723 INCREASED Positions as of 03/31/2013

Company Class Value of Shares ($1,000s) Change in Value ($1,000s) Change (%) Shares Held
STERICYCLE INC COM 429,018 6,919 1.64 3,924,063
TAIWAN SEMICONDUCTOR MFG LTD SPONSORED ADR 422,369 419,046 12,611.96 23,309,541
AFFILIATED MANAGERS GROUP COM 363,340 5,052 1.41 2,153,508
GOOGLE INC CL A 257,418 10,995 4.46 290,457
DICKS SPORTING GOODS INC COM 246,666 7,370 3.08 4,783,133
BANK RAKYAT INDONESIA SHS 242,903 37,519 18.27 315,458,321
PRECISION CASTPARTS CORP COM 237,880 17,885 8.13 1,086,460
MASTERCARD INC CL A 228,524 14,545 6.80 395,240
IDEXX LABS INC COM 216,155 4,252 2.01 2,378,470
CANADIAN NATL RY CO COM 206,803 963 .47 2,111,097
EXPRESS SCRIPTS HLDG CO COM 204,782 29,357 16.74 3,251,539
PERRIGO CO COM 202,450 48,165 31.22 1,693,998
O REILLY AUTOMOTIVE INC NEW COM 188,998 2,313 1.24 1,688,235
UNION PAC CORP COM 184,171 5,682 3.18 1,180,812
COSTCO WHSL CORP NEW COM 183,543 56,078 44.00 1,643,179
CREDICORP LTD COM 183,035 72,635 65.79 1,384,741
ALLERGAN INC COM 177,436 2,862 1.64 1,748,482
JACOBS ENGR GROUP INC DEL COM 165,520 4,161 2.58 2,913,061
PANDORA MEDIA INC COM 163,916 38,021 30.20 10,869,793
SALLY BEAUTY HLDGS INC COM 162,013 7,733 5.01 5,280,727

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