EcoR1 Capital, LLC Quant / Systematic

Location: San Francisco, CA

CIK: 0001587114 · Show all filings

Period: Q2 2015 (← Previous) (Next →)

Filing Date: Aug 14, 2015

Total Value: $300M (91.9% shares, 8.1% debt)

Holdings (25)

— ATARA BIOTHERAPEUTICS 18.7%

Value $56.09M Shares 1,063,189 Est. Cost $36.04 Unrealized —

— EPIZYME 13.5%

Value $40.46M Shares 1,685,800 Est. Cost $19.11 Unrealized —

— ASSEMBLY BIOSCIENCES 10.1%

Value $30.32M Shares 1,574,107 Est. Cost $9.79 Unrealized —

— FIBROGEN 9.4%

Value $28.33M Shares 1,205,391 Est. Cost $24.77 Unrealized —

— ARRAY BIOPHARMA SR CONV NT 3.000% Due 06/01/2020 8.1%

Value $24.24M Shares 19,200,000 Est. Cost $0.96 Unrealized —

— KITE PHARMA 5.7%

Value $17.16M Shares 281,400 Est. Cost $57.67 Unrealized —

— FLEX PHARMA 5.2%

Value $15.63M Shares 908,691 Est. Cost $19.33 Unrealized —

— ATYR PHARMA 5.2%

Value $15.5M Shares 836,860 Est. Cost $18.52 Unrealized —

— RETROPHIN 3.8%

Value $11.33M Shares 341,650 Est. Cost $23.96 Unrealized —

— KINDRED BIOSCIENCES 2.9%

Value $8.828M Shares 1,294,431 Est. Cost $7.45 Unrealized —

COLL COLLEGIUM PHARMACEUTICAL 2.8%

Value $8.298M Shares 465,118 Est. Cost $17.29 Unrealized 0.0%

— ARRAY BIOPHARMA 2.6%

Value $7.931M Shares 11,000 Est. Cost — Unrealized —

— OVASCIENCE 2.2%

Value $6.654M Shares 2,300 Est. Cost — Unrealized —

— FORWARD PHARMA A/S SPONSORED ADR 2.0%

Value $6.049M Shares 158,985 Est. Cost $23.61 Unrealized —

— GENVEC 1.4%

Value $4.052M Shares 1,986,413 Est. Cost $2.08 Unrealized —

— CELLADON 1.2%

Value $3.582M Shares 2,843,170 Est. Cost $1.26 Unrealized —

— CALITHERA BIOSCIENCES 1.0%

Value $2.967M Shares 415,480 Est. Cost $15.57 Unrealized —

— ARRAY BIOPHARMA 1.0%

Value $2.884M Shares 400,000 Est. Cost $7.21 Unrealized —

— BIOTIE THERAPIES OYJ SPONSORED ADR 0.7%

Value $1.997M Shares 100,000 Est. Cost $19.97 Unrealized —

— TARGACEPT 0.6%

Value $1.729M Shares 619,699 Est. Cost $2.63 Unrealized —

— SERES THERAPEUTICS 0.6%

Value $1.66M Shares 40,000 Est. Cost $41.50 Unrealized —

Value $1.652M Shares 400,000 Est. Cost $4.13 Unrealized —

— REGULUS THERAPEUTICS 0.5%

Value $1.403M Shares 1,280 Est. Cost — Unrealized —

XENE XENON PHARMACEUTICALS 0.3%

Value $842K Shares 73,000 Est. Cost $14.68 Unrealized -5.8%

— EPIZYME 0.1%

Value $360K Shares 150 Est. Cost — Unrealized —

Ticker	Issuer	Shares	Value	%	Est. Cost	Unrealized	Class	CUSIP
—	ATARA BIOTHERAPEUTICS	1,063,189	$56.09M	18.7%	$36.04	—	COM	046513107
—	EPIZYME	1,685,800	$40.46M	13.5%	$19.11	—	COM	29428V104
—	ASSEMBLY BIOSCIENCES	1,574,107	$30.32M	10.1%	$9.79	—	COM	045396108
—	FIBROGEN	1,205,391	$28.33M	9.4%	$24.77	—	COM	31572Q808
—	ARRAY BIOPHARMA SR CONV NT 3.000% Due 06/01/2020	19,200,000	$24.24M	8.1%	$0.96	—	NOTE	04269XAA3
—	KITE PHARMA	281,400	$17.16M	5.7%	$57.67	—	COM	49803L109
—	FLEX PHARMA	908,691	$15.63M	5.2%	$19.33	—	COM	33938A105
—	ATYR PHARMA	836,860	$15.5M	5.2%	$18.52	—	COM	002120103
—	RETROPHIN	341,650	$11.33M	3.8%	$23.96	—	COM	761299106
—	KINDRED BIOSCIENCES	1,294,431	$8.828M	2.9%	$7.45	—	COM	494577109
COLL	COLLEGIUM PHARMACEUTICAL	465,118	$8.298M	2.8%	$17.29	0.0%	COM	19459J104
—	ARRAY BIOPHARMA	11,000	$7.931M	2.6%	—	—	Call	04269X905
—	OVASCIENCE	2,300	$6.654M	2.2%	—	—	Call	69014Q901
—	FORWARD PHARMA A/S SPONSORED ADR	158,985	$6.049M	2.0%	$23.61	—	SPONSORED ADR	34986J105
—	GENVEC	1,986,413	$4.052M	1.4%	$2.08	—	COM	37246C307
—	CELLADON	2,843,170	$3.582M	1.2%	$1.26	—	COM	15117E107
—	CALITHERA BIOSCIENCES	415,480	$2.967M	1.0%	$15.57	—	COM	13089P101
—	ARRAY BIOPHARMA	400,000	$2.884M	1.0%	$7.21	—	COM	04269X105
—	BIOTIE THERAPIES OYJ SPONSORED ADR	100,000	$1.997M	0.7%	$19.97	—	SPONSORED ADR	09074D103
—	TARGACEPT	619,699	$1.729M	0.6%	$2.63	—	COM	87611R306
—	SERES THERAPEUTICS	40,000	$1.66M	0.6%	$41.50	—	COM	81750R102
—	QLT	400,000	$1.652M	0.6%	$4.13	—	COM	746927102
—	REGULUS THERAPEUTICS	1,280	$1.403M	0.5%	—	—	Call	75915K901
XENE	XENON PHARMACEUTICALS	73,000	$842K	0.3%	$14.68	-5.8%	COM	98420N105
—	EPIZYME	150	$360K	0.1%	—	—	Call	29428V904