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)
25,233

Sector Weighting

Basic Materials 4.4%
Capital Goods 5.14%
Conglomerates 0.92%
Consumer Cyclical 5.53%
Consumer/Non-Cyclical 7.03%
Energy 6.25%
Financial 16.67%
Healthcare 9.63%
Services 21.85%
Technology 17.46%
Transportation 4.11%
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
3-D SYS CORP DEL COM NEW -294 Sold Out 0
3M CO COM 24,424 -3,110 (11.3) 219,270
ABB LTD SPONSORED ADR 6,814 -639 (8.58) 305,293
ABBOTT LABS EX DISTRIB WI -619 Sold Out 0
ABBVIE INC COM 34,136 -6,387 (15.76) 723,685
ABM INDS INC COM 689 -9 (1.23) 29,579
ACCRETIVE HEALTH INC COM -236 Sold Out 0
ACHILLION PHARMACEUTICALS INC COM 136 -54 (28.57) 17,500
ACQUITY GROUP LTD SPONSORED ADR -151 Sold Out 0
ACTAVIS INC COM 3,218 -40 (1.23) 25,641
ACTIVISION BLIZZARD INC COM 1,257 -1,093 (46.52) 84,108
ADOBE SYS INC COM 7,022 -161 (2.24) 157,418
ADTRAN INC COM 10,501 -102 (0.96) 460,759
AFLAC INC COM 301 -34 (10.06) 5,444
AGILENT TECHNOLOGIES INC COM 450 -882 (66.22) 9,872
AGL RES INC COM 1,346 -41 (2.95) 30,457
AIR METHODS CORP COM PAR $.06 22,175 -3,307 (12.98) 641,821
AIRGAS INC COM 212,803 -8,376 (3.79) 2,088,965
ALEXANDRIA REAL ESTATE EQ INC COM -817 Sold Out 0
ALIGN TECHNOLOGY INC COM 50,250 -2,189 (4.18) 1,336,791

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