Tekla Capital Management 13F-HR Quarterly holdings report by institutional manager

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE

OMB APPROVAL

OMB Number:		3235-0006
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COLUMN 1	COLUMN 2	COLUMN 3	COLUMN 4	COLUMN 5			COLUMN 6	COLUMN 7	COLUMN 8
			VALUE	SHRS OR	SH/	PUT/	INVESTMENT	OTHER	VOTING AUTHORITY
NAME OF ISSUER	TITLE OF CLASS	CUSIP	(x$1000)	PRN AMT	PRN	CALL	DISCRETION	MANAGER	SOLE	SHARED	NONE
Accuray, Inc.	Common	004397105	6,441	731,943	SH		SOLE		731,943	0	0
Acorda Therapeutics, Inc.	Common	00484M106	7,610	225,762	SH		SOLE		225,762	0	0
Actavis plc	Shares	G0083B108	45,883	205,707	SH		SOLE		205,707	0	0
Aegerion Pharmaceuticals, Inc.	Common	00767E102	1	20	SH		SOLE		20	0	0
Aetna, Inc.	Common	00817Y108	20,071	247,541	SH		SOLE		247,541	0	0
Akorn, Inc.	Common	009728106	23,254	699,382	SH		SOLE		699,382	0	0
Alere, Inc.	Common	01449J105	10,722	286,540	SH		SOLE		286,540	0	0
Alexion Pharmaceuticals, Inc.	Common	015351109	52,484	335,899	SH		SOLE		335,899	0	0
Alkermes plc	Shares	G01767105	12,883	255,970	SH		SOLE		255,970	0	0
Allergan, Inc.	Common	018490102	26,504	156,627	SH		SOLE		156,627	0	0
Alnylam Pharmaceuticals, Inc.	Common	02043Q107	3,891	61,595	SH		SOLE		61,595	0	0
Amarin Corporation plc	Sponsored ADR	023111206	1,769	1,005,000	SH		SOLE		1,005,000	0	0
Amgen, Inc.	Common	031162100	53,212	449,543	SH		SOLE		449,543	0	0
BioDelivery Sciences International, Inc.	Common	09060J106	6,054	501,553	SH		SOLE		501,553	0	0
Biogen Idec, Inc.	Common	09062X103	54,859	173,983	SH		SOLE		173,983	0	0
BioMarin Pharmaceutical Inc.	Common	09061G101	26,214	421,384	SH		SOLE		421,384	0	0
bluebird bio, Inc.	Common	09609G100	2,103	54,527	SH		SOLE		54,527	0	0
Bristol-Myers Squibb Co.	Common	110122108	9,828	202,600	SH		SOLE		202,600	0	0
Catamaran Corporation	Common	148887102	10,201	231,000	SH		SOLE		231,000	0	0
Celgene Corporation	Common	151020104	81,079	944,092	SH		SOLE		944,092	0	0
Celladon Corporation	Common	15117E107	13,215	970,495	SH		SOLE		970,495	0	0
Centene Corporation	Common	15135B101	4,537	60,000	SH		SOLE		60,000	0	0
Clovis Oncology, Inc.	Common	189464100	1,961	47,364	SH		SOLE		47,364	0	0
Cubist Pharmaceuticals, Inc.	Common	229678107	18,417	263,772	SH		SOLE		263,772	0	0
Endo International PLC	Shares	G30401106	8,838	126,215	SH		SOLE		126,215	0	0
Epizyme Inc.	Common	29428V104	2,183	70,162	SH		SOLE		70,162	0	0
Forest Laboratories, Inc.	Common	345838106	10,878	109,875	SH		SOLE		109,875	0	0
Gilead Sciences, Inc.	Common	375558103	124,756	1,504,712	SH		SOLE		1,504,712	0	0
Heron Therapeutics, Inc.	Common	427746102	10,767	873,940	SH		SOLE		873,940	0	0
IDEXX Laboratories, Inc.	Common	45168D104	7,515	56,265	SH		SOLE		56,265	0	0
Illumina, Inc.	Common	452327109	18,540	103,841	SH		SOLE		103,841	0	0
Impax Laboratories, Inc.	Common	45256B101	10,337	344,683	SH		SOLE		344,683	0	0
Incyte Corporation	Common	45337C102	43,359	768,238	SH		SOLE		768,238	0	0
Infinity Pharmaceuticals, Inc.	Common	45665G303	8,673	680,746	SH		SOLE		680,746	0	0
IntelliPharmaCeutics International Inc.	Common	458173101	5,349	1,404,000	SH		SOLE		1,404,000	0	0
InterMune, Inc.	Note 2.5% 9/15/18	45884XAE3	2,702	1,800,000	PRN		SOLE		1,800,000	0	0
Ironwood Pharmaceuticals, Inc.	Common	46333X108	11,774	768,050	SH		SOLE		768,050	0	0
ishares Nasdaq Biotechnology ETF	ETF	464287556	16,754	65,184	SH		SOLE		65,184	0	0
Jazz Pharmaceuticals PLC	Shares	G50871105	14,107	95,957	SH		SOLE		95,957	0	0
KYTHERA Biopharmaceuticals Inc.	Common	501570105	1,880	49,000	SH		SOLE		49,000	0	0
Macrogenics, Inc.	Common	556099109	692	31,857	SH		SOLE		31,857	0	0
McKesson Corporation	Common	58155Q103	12,637	67,862	SH		SOLE		67,862	0	0
MEI Pharma, Inc.	Common	55279B202	1,546	243,920	SH		SOLE		243,920	0	0
Merrimack Pharmaceuticals, Inc.	Note 4.50% 7/15/20	590328AA8	1,966	1,485,000	PRN		SOLE		1,485,000	0	0
Merrimack Pharmaceuticals, Inc.	Common	590328100	4,139	567,787	SH		SOLE		567,787	0	0
Molina Healthcare, Inc.	Common	60855R100	9,486	212,541	SH		SOLE		212,541	0	0
Momenta Pharmaceuticals, Inc.	Common	60877T100	4,270	353,475	SH		SOLE		353,475	0	0
Mylan, Inc.	Common	628530107	33,628	652,209	SH		SOLE		652,209	0	0
Neurocrine Biosciences, Inc.	Common	64125C109	11,731	790,490	SH		SOLE		790,490	0	0
NPS Pharmaceuticals, Inc.	Common	62936P103	2,740	82,900	SH		SOLE		82,900	0	0
OncoGenex Pharmaceuticals, Inc.	Common	68230A106	422	113,100	SH		SOLE		113,100	0	0
PerkinElmer, Inc.	Common	714046109	7,752	165,495	SH		SOLE		165,495	0	0
Perrigo Company plc	Shares	G97822103	9,176	62,952	SH		SOLE		62,952	0	0
Pfizer, Inc.	Common	717081103	9,942	334,957	SH		SOLE		334,957	0	0
PTC Therapeutics, Inc.	Common	69366J200	2,069	79,150	SH		SOLE		79,150	0	0
Regeneron Pharmaceuticals, Inc.	Common	75886F107	54,648	193,466	SH		SOLE		193,466	0	0
Sagent Pharmaceuticals, Inc.	Common	786692103	10,466	404,731	SH		SOLE		404,731	0	0
Sangamo BioSciences, Inc.	Common	800677106	1,839	120,400	SH		SOLE		120,400	0	0
Shire plc	Sponsored ADR	82481R106	29,041	123,322	SH		SOLE		123,322	0	0
Teva Pharmaceutical Industries Ltd.	ADR	881624209	16,328	311,476	SH		SOLE		311,476	0	0
Thermo Fisher Scientific Inc.	Common	883556102	7,040	59,660	SH		SOLE		59,660	0	0
UnitedHealth Group, Inc.	Common	91324P102	6,800	83,186	SH		SOLE		83,186	0	0
Verastem, Inc.	Common	92337C104	8,325	918,827	SH		SOLE		918,827	0	0
Vertex Pharmaceuticals, Inc.	Common	92532F100	51,217	540,944	SH		SOLE		540,944	0	0