TEKLA CAPITAL MANAGEMENT LLC Information

2 LIBERTY SQUARE, BOSTON, Massachusetts, 02109, (617) 772-8500

Report Date: 03/31/2013

Position Statistics:

Total Positions 65
New Positions 4
Increased Positions 11
Decreased Positions 16
Positions with Activity 27
Sold Out Positions 4
Total Mkt Value
(in $ millions)
768

Sector Weighting

Basic Materials
Capital Goods
Conglomerates 3.34%
Consumer Cyclical
Consumer/Non-Cyclical
Energy
Financial 2.24%
Healthcare 91.68%
Services 0.55%
Technology 2.19%
Transportation
Utilities

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

65 Positions as of 03/31/2013

Company Class Value of Shares ($1,000s) Change in Value ($1,000s) Change (%) Shares Held
AETNA INC NEW COM 11,939 New 197,241
ACTAVIS INC COM 11,570 New 91,500
ARIAD PHARMACEUTICALS INC COM 11,178 New 618,620
MEDIVATION INC COM 10,752 -2,522 (19) 211,399
VERASTEM INC COM 9,522 New 884,920
AMGEN INC COM 9,266 8,290 850.24 95,109
ALKERMES PLC SHS 9,197 -3,066 (25) 312,827
ALERE INC COM 8,980 New 351,726
INCYTE CORP COM 8,919 New 421,300
ILLUMINA INC COM 7,845 New 115,379
AMARIN CORP PLC SPONS ADR NEW 7,210 1,873 35.09 1,066,498
MCKESSON CORP COM 6,499 New 56,862
IMPAX LABORATORIES INC COM 6,497 New 344,683
IMMUNOGEN INC COM 6,269 New 393,773
NEKTAR THERAPEUTICS COM 6,255 New 674,724
FOREST LABS INC COM 6,018 6,018 New 146,500
ALLERGAN INC COM 5,937 -5,057 (46) 58,700
BAXTER INTL INC COM 5,484 New 77,675
UNITEDHEALTH GROUP INC COM 5,259 New 82,436
IDEXX LABS INC COM 5,023 New 56,265

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