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)
25,254

Sector Weighting

Basic Materials 4.43%
Capital Goods 5.18%
Conglomerates 0.91%
Consumer Cyclical 5.56%
Consumer/Non-Cyclical 6.99%
Energy 6.29%
Financial 16.66%
Healthcare 9.61%
Services 21.84%
Technology 17.38%
Transportation 4.12%
Utilities 0.66%

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

1,502 Positions as of 03/31/2013

Company Class Value of Shares ($1,000s) Change in Value ($1,000s) Change (%) Shares Held
IDEXX LABS INC COM 203,502 4,003 2.01 2,378,470
CREDICORP LTD COM 202,505 80,361 65.79 1,384,741
PERRIGO CO COM 200,993 47,818 31.22 1,693,998
EXPRESS SCRIPTS HLDG CO COM 199,352 28,579 16.74 3,251,539
O REILLY AUTOMOTIVE INC NEW COM 189,437 2,318 1.24 1,688,235
UNION PAC CORP COM 187,111 5,773 3.18 1,180,812
COSTCO WHSL CORP NEW COM 186,468 56,972 44.00 1,643,179
DISCOVERY COMMUNICATNS NEW COM SER A 183,713 -2,056 (1.11) 2,296,417
B/E AEROSPACE INC COM 180,416 -6,553 (3.51) 2,858,747
PANDORA MEDIA INC COM 176,091 40,845 30.20 10,869,793
SBA COMMUNICATIONS CORP COM 175,291 -62,448 (26.27) 2,172,406
TRACTOR SUPPLY CO COM 172,967 -17,327 (9.11) 1,512,479
STARBUCKS CORP COM 172,321 -7,435 (4.14) 2,682,037
ALLERGAN INC COM 172,295 2,779 1.64 1,748,482
COMPANHIA DE BEBIDAS DAS AMERS SPON ADR PFD 169,140 23,071 15.79 3,996,687
ECOLAB INC COM 164,001 -34,867 (17.53) 1,841,672
SALLY BEAUTY HLDGS INC COM 163,967 7,827 5.01 5,280,727
EBAY INC COM 163,899 -18,558 (10.17) 2,982,689
TRANSDIGM GROUP INC COM 163,829 -12,743 (7.22) 1,096,435
JACOBS ENGR GROUP INC DEL COM 160,364 4,032 2.58 2,913,061

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