EcoR1 Capital, LLC Q3 2016 Filing

Filed November 14, 2016

Portfolio Value

$325.9B

Holdings

31

Report Date

Q3 2016

Filing Type

13F-HR

All Holdings (31 positions)

#StockSharesValue% PortfolioType
1
IRWDIRONWOOD PHARMACEUTICALS INC
2,810,315$44.6B13.69%
2
GLPGGALAPAGOS NV
500,576$32.4B9.93%
3
BMYBRISTOL MYERS SQUIBB CO
500,000$27.0B8.27%Call
4
ASMBASSEMBLY BIOSCIENCES INC
2,943,164$21.2B6.51%
5
DERMIRA INC
522,000$17.7B5.42%
6
ARDXARDELYX INC
1,310,023$17.0B5.20%
7
KURAKURA ONCOLOGY INC
2,611,906$16.3B5.01%
8
FIVE PRIME THERAPEUTICS INC
286,612$15.0B4.62%
9
FGENEURFIBROGEN INC
686,184$14.2B4.36%
10
GILDGILEAD SCIENCES INC
150,000$11.9B3.64%Call
11
ALLERGAN PLC
50,000$11.5B3.53%Call
12
AGIOAGIOS PHARMACEUTICALS INC
200,000$10.6B3.24%
13
PROTEOSTASIS THERAPEUTICS INC
602,315$9.4B2.88%
14
EXASEXACT SCIENCES CORP
500,000$9.3B2.85%Put
15
ACHAOGEN INC
1,679,707$8.0B2.47%
16
CYTKCYTOKINETICS INC
846,654$7.8B2.38%
17
KINDRED BIOSCIENCES INC
1,432,765$7.1B2.19%
18
SNDXSYNDAX PHARMACEUTICALS INC
357,365$5.4B1.66%
19
ONCBEIGENE LTD
163,470$5.0B1.55%
20
IRWDIRONWOOD PHARMACEUTICALS INC
281,500$4.5B1.37%Call
21
ASNDASCENDIS PHARMA A S
219,200$4.4B1.35%
22
SPARK THERAPEUTICS INC
68,600$4.1B1.26%
23
ADVMCHFADVERUM BIOTECHNOLOGIES INC
946,263$3.9B1.19%
24
NABRIVA THERAPEUTICS AG
548,912$3.9B1.19%
25
NTLAINTELLIA THERAPEUTICS INC
200,858$3.4B1.05%
26
CMRXEURCHIMERIX INC
598,062$3.3B1.02%
27
ONCOMED PHARMACEUTICALS INC
265,784$3.0B0.93%
28
FATEFATE THERAPEUTICS INC
590,527$1.8B0.57%
29
CHEMOCENTRYX INC
178,000$1.1B0.33%
30
SYROS PHARMACEUTICALS INC
63,596$882.0M0.27%
31
CASCADIAN THERAPEUTICS INC
103,800$170.0M0.05%Call