A.R.T. ADVISORS, LLC Information

500 PARK AVENUE, NEW YORK, New York, 10022, (212) 593-7700

Report Date: 03/31/2013

Position Statistics:

Total Positions 1,813
New Positions 542
Increased Positions 889
Decreased Positions 874
Positions with Activity 1,763
Sold Out Positions 500
Total Mkt Value
(in $ millions)
2,645

Sector Weighting

Basic Materials 5.79%
Capital Goods 6.43%
Conglomerates 0.14%
Consumer Cyclical 4.74%
Consumer/Non-Cyclical 3.48%
Energy 9.99%
Financial 11.73%
Healthcare 10.76%
Services 23.1%
Technology 17.62%
Transportation 2.86%
Utilities 3.32%

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

1,813 Positions as of 03/31/2013

Company Class Value of Shares ($1,000s) Change in Value ($1,000s) Change (%) Shares Held
AMERICAN INTL GROUP INC COM NEW 28,732 -2,527 (8.09) 639,048
INTEL CORP COM 27,725 27,725 New 1,148,041
KINDER MORGAN INC DEL COM 24,657 24,657 New 600,081
CATERPILLAR INC DEL COM 24,087 22,250 1,210.93 273,408
SBA COMMUNICATIONS CORP COM 21,350 9,300 77.17 264,599
GOOGLE INC CL A 21,099 21,099 New 23,263
CROWN CASTLE INTL CORP COM 17,743 -4,515 (20.29) 230,793
PULTE GROUP INC COM 17,060 2,284 15.46 740,148
PIONEER NAT RES CO COM 16,949 16,949 New 121,962
CARDINAL HEALTH INC COM 16,139 5,215 47.74 336,508
CITIGROUP INC COM NEW 15,122 3,813 33.72 292,714
ENSCO PLC SHS CLASS A 14,485 14,485 New 228,574
HUMANA INC COM 14,371 13,456 1,470.56 180,724
SALESFORCE COM INC COM 14,298 14,298 New 308,604
CISCO SYS INC COM 13,964 11,233 411.28 581,607
VERTEX PHARMACEUTICALS INC COM 13,728 1,625 13.43 172,739
MCKESSON CORP COM 13,691 1,701 14.19 115,621
TAIWAN SEMICONDUCTOR MFG LTD SPONSORED ADR 13,322 13,101 5,928.87 692,777
URBAN OUTFITTERS INC COM 13,229 13,229 New 305,723
PRICELINE COM INC COM NEW 13,097 3,671 38.95 15,857

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