EcoR1 Capital

EcoR1 Capital as of June 30, 2015

Portfolio Holdings for EcoR1 Capital

EcoR1 Capital holds 25 positions in its portfolio as reported in the June 2015 quarterly 13F filing

Company (Ticker) Portfolio Weight Valued At Change in Shares Share Count Share Price
Atara Biotherapeutics (ATRA) 18.7 $56M 1.1M 52.76
Epizyme 13.5 $41M 1.7M 24.00
Assembly Biosciences 10.1 $30M 1.6M 19.26
Fibrogen (FGEN) 9.4 $28M 1.2M 23.50
ARRAY BIOPHARMA SR CONV NT 3.000% Due 06/01/2020 Note (Principal) 8.1 $24M 19M 1.26
Kite Pharma 5.7 $17M 281k 60.97
Flex Pharma 5.2 $16M 909k 17.20
Atyr Pharma Inc Common Stock Usd 0.001 5.2 $16M 837k 18.52
Retrophin 3.8 $11M 342k 33.15
Kindred Biosciences 2.9 $8.8M 1.3M 6.82
Collegium Pharmaceutical Inc Common Stock Usd (COLL) 2.8 $8.3M 465k 17.84
Array Biopharma Call Option 2.6 $7.9M 11k 721.04
Ovascience Inc call Call Option 2.2 $6.7M 2.3k 2893.33
Forward Pharma A/s Sponsored Adr 2.0 $6.0M 159k 38.05
Genvec 1.4 $4.1M 2.0M 2.04
Celladon 1.2 $3.6M 2.8M 1.26
Calithera Biosciences 1.0 $3.0M 416k 7.14
Array BioPharma 1.0 $2.9M 400k 7.21
Biotie Therapies Oyj Sponsored Adr 0.7 $2.0M 100k 19.97
Targacept 0.6 $1.7M 620k 2.79
Seres Therapeutics (MCRB) 0.6 $1.7M 40k 41.50
Qlt 0.6 $1.7M 400k 4.13
Regulus Therapeutics Call Option 0.5 $1.4M 1.3k 1096.09
Xenon Pharmaceuticals (XENE) 0.3 $842k 73k 11.53
Epizyme Inc call Call Option 0.1 $360k 150.00 2400.00