EcoR1 Capital, LLC Quant / Systematic

Location: San Francisco, CA

CIK: 0001587114 · Show all filings

Period: Q4 2014 (Next →)

Filing Date: Feb 17, 2015

Total Value: $198M (91.8% shares, 8.2% debt)

Holdings (22)

— KITE PHARMA INC 12.8%

Value $25.28M Shares 438,400 Est. Cost $57.67 Unrealized —

— CLOVIS ONCOLOGY INC 10.9%

Value $21.52M Shares 384,348 Est. Cost $56.00 Unrealized —

— RECEPTOS INC 9.0%

Value $17.86M Shares 145,801 Est. Cost $122.51 Unrealized —

— ARRAY BIOPHARMA INC 8.2%

Value $16.25M Shares 17,500,000 Est. Cost $0.93 Unrealized —

MGNX MACROGENICS INC 8.1%

Value $15.91M Shares 453,626 Est. Cost $24.93 Unrealized 0.0%

IRWD IRONWOOD PHARMACEUTICALS INC 7.0%

Value $13.79M Shares 900,000 Est. Cost $11.44 Unrealized 0.0%

— FIBROGEN INC 5.5%

Value $10.94M Shares 400,000 Est. Cost $27.34 Unrealized —

— ATARA BIOTHERAPEUTICS INC 5.1%

Value $10.13M Shares 385,124 Est. Cost $26.31 Unrealized —

— KINDRED BIOSCIENCES INC 4.9%

Value $9.644M Shares 1,294,431 Est. Cost $7.45 Unrealized —

— SAGE THERAPEUTICS INC 4.6%

Value $9.069M Shares 491,044 Est. Cost $18.47 Unrealized —

— KERYX BIOPHARMACEUTICALS INC 4.2%

Value $8.334M Shares 589,000 Est. Cost — Unrealized —

— ASSEMBLY BIOSCIENCES INC 4.0%

Value $7.937M Shares 1,009,752 Est. Cost $7.86 Unrealized —

XENE XENON PHARMACEUTICALS INC 3.3%

Value $6.479M Shares 328,070 Est. Cost $14.68 Unrealized 0.0%

— GENVEC INC 2.1%

Value $4.132M Shares 1,986,413 Est. Cost $2.08 Unrealized —

— CALITHERA BIOSCIENCES INC 2.1%

Value $4.074M Shares 201,700 Est. Cost $20.20 Unrealized —

— VITAE PHARMACEUTICALS INC 1.7%

Value $3.444M Shares 207,000 Est. Cost $16.64 Unrealized —

— ONCOMED PHARMACEUTICALS INC 1.7%

Value $3.417M Shares 157,038 Est. Cost $21.76 Unrealized —

— PARATEK PHARMACEUTICALS INC 1.5%

Value $3.044M Shares 78,958 Est. Cost $38.55 Unrealized —

— FORWARD PHARMA A/S 1.1%

Value $2.083M Shares 100,000 Est. Cost $20.83 Unrealized —

— TARGACEPT INC 0.8%

Value $1.63M Shares 619,699 Est. Cost $2.63 Unrealized —

HALO HALOZYME THERAPEUTICS INC 0.8%

Value $1.551M Shares 160,700 Est. Cost — Unrealized —

— ARRAY BIOPHARMA INC 0.5%

Value $1.08M Shares 228,400 Est. Cost — Unrealized —

Ticker	Issuer	Shares	Value	%	Est. Cost	Unrealized	Class	CUSIP
—	KITE PHARMA INC	438,400	$25.28M	12.8%	$57.67	—	COM	49803L109
—	CLOVIS ONCOLOGY INC	384,348	$21.52M	10.9%	$56.00	—	COM	189464100
—	RECEPTOS INC	145,801	$17.86M	9.0%	$122.51	—	COM	756207106
—	ARRAY BIOPHARMA INC	17,500,000	$16.25M	8.2%	$0.93	—	NOTE 3.00% 6/0	04269XAA3
MGNX	MACROGENICS INC	453,626	$15.91M	8.1%	$24.93	0.0%	COM	556099109
IRWD	IRONWOOD PHARMACEUTICALS INC	900,000	$13.79M	7.0%	$11.44	0.0%	COM CL A	46333X108
—	FIBROGEN INC	400,000	$10.94M	5.5%	$27.34	—	COM	31572Q808
—	ATARA BIOTHERAPEUTICS INC	385,124	$10.13M	5.1%	$26.31	—	COM	046513107
—	KINDRED BIOSCIENCES INC	1,294,431	$9.644M	4.9%	$7.45	—	COM	494577109
—	SAGE THERAPEUTICS INC	491,044	$9.069M	4.6%	$18.47	—	COM	78667J108
—	KERYX BIOPHARMACEUTICALS INC	589,000	$8.334M	4.2%	—	—	Call	492515101
—	ASSEMBLY BIOSCIENCES INC	1,009,752	$7.937M	4.0%	$7.86	—	COM	045396108
XENE	XENON PHARMACEUTICALS INC	328,070	$6.479M	3.3%	$14.68	0.0%	COM	98420N105
—	GENVEC INC	1,986,413	$4.132M	2.1%	$2.08	—	COM NEW	37246C307
—	CALITHERA BIOSCIENCES INC	201,700	$4.074M	2.1%	$20.20	—	COM	13089P101
—	VITAE PHARMACEUTICALS INC	207,000	$3.444M	1.7%	$16.64	—	COM	92847N103
—	ONCOMED PHARMACEUTICALS INC	157,038	$3.417M	1.7%	$21.76	—	COM	68234X102
—	PARATEK PHARMACEUTICALS INC	78,958	$3.044M	1.5%	$38.55	—	COM	699374302
—	FORWARD PHARMA A/S	100,000	$2.083M	1.1%	$20.83	—	SPONSORED ADR	34986J105
—	TARGACEPT INC	619,699	$1.63M	0.8%	$2.63	—	COM	87611R306
HALO	HALOZYME THERAPEUTICS INC	160,700	$1.551M	0.8%	—	—	Call	40637H109
—	ARRAY BIOPHARMA INC	228,400	$1.08M	0.5%	—	—	Call	04269X105