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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 1,502
New Positions 159
Increased Positions 724
Decreased Positions 650
Positions with Activity 1,374
Sold Out Positions 129
Total Mkt Value
(in $ millions)		 25,007

Sector Weighting

Basic Materials 4.38%
Capital Goods 5.15%
Conglomerates 0.93%
Consumer Cyclical 5.5%
Consumer/Non-Cyclical 7.09%
Energy 6.21%
Financial 16.67%
Healthcare 9.62%
Services 21.86%
Technology 17.48%
Transportation 4.1%
Utilities 0.66%

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

650 DECREASED Positions as of 03/31/2013

Company Class Value of Shares ($1,000s) Change in Value ($1,000s) Change (%) Shares Held
CAVIUM INC COM 42,376 -3,510 (7.65) 1,191,341
FIRSTSERVICE CORP SUB VTG SH 41,801 -99 (0.24) 1,267,470
LIQUIDITY SERVICES INC COM 41,749 -9,493 (18.53) 1,101,835
VERA BRADLEY INC COM 40,061 -2,159 (5.11) 1,711,266
BROOKDALE SR LIVING INC COM 39,699 -32,410 (44.95) 1,336,666
ARUBA NETWORKS INC COM 39,391 -1,530 (3.74) 2,236,836
SALESFORCE COM INC COM 38,856 -1,151 (2.88) 841,960
TEXAS ROADHOUSE INC COM 37,950 -1,573 (3.98) 1,577,959
SPDR GOLD TRUST GOLD SHS 37,019 -3,465 (8.56) 276,079
POLARIS INDS INC COM 36,621 -1,481 (3.89) 405,187
COPA HOLDINGS SA CL A 35,647 -48,391 (57.58) 260,766
VALUECLICK INC COM 33,648 -3,940 (10.48) 1,268,775
ABBVIE INC COM 33,441 -6,257 (15.76) 723,685
WAL-MART STORES INC COM 33,199 -2,591 (7.24) 422,915
WUXI PHARMATECH CAYMAN INC SPONS ADR SHS 31,840 -25,696 (44.66) 1,566,941
CAI INTERNATIONAL INC COM 30,221 -5,702 (15.87) 1,155,692
STANDARD PARKING CORP COM 29,669 -1,204 (3.9) 1,304,695
PAYCHEX INC COM 29,466 -2,319 (7.3) 776,648
CONCUR TECHNOLOGIES INC COM 29,100 -56,064 (65.83) 347,915
ANSYS INC COM 28,953 -1,222 (4.05) 380,607