EcoR1 Capital, LLC Quant / Systematic

Location: San Francisco, CA

CIK: 0001587114 · Show all filings

Period: Q1 2019 (← Previous) (Next →)

Filing Date: May 15, 2019

Total Value: $1.085B (100.0% shares, 0.0% debt)

Holdings (41)

ARGX ARGENX SE 9.5%
Value $103M Shares 825,087 Est. Cost $96.07 Unrealized
KURA KURA ONCOLOGY INC 8.1%
Value $87.54M Shares 5,276,753 Est. Cost $10.87 Unrealized +41.7%
MIRATI THERAPEUTICS INC 6.8%
Value $73.3M Shares 1,000,000 Est. Cost $53.32 Unrealized
CRSP CRISPR THERAPEUTICS AG 6.2%
Value $67.09M Shares 1,878,277 Est. Cost $36.55 Unrealized -5.4%
XNCR XENCOR INC 5.9%
Value $63.97M Shares 2,059,429 Est. Cost $34.92 Unrealized -4.7%
SPARK THERAPEUTICS INC 5.6%
Value $60.24M Shares 529,000 Est. Cost $50.49 Unrealized
IRWD IRONWOOD PHARMACEUTICALS INC 5.5%
Value $59.49M Shares 4,397,168 Est. Cost $11.86 Unrealized -5.8%
FIBROGEN INC 5.0%
Value $54.35M Shares 1,000,000 Est. Cost Unrealized
DICERNA PHARMACEUTICALS INC 4.5%
Value $48.59M Shares 3,316,407 Est. Cost $9.60 Unrealized
ASND ASCENDIS PHARMA A S 3.9%
Value $42.47M Shares 360,819 Est. Cost $26.79 Unrealized
ASCENDIS PHARMA A S 3.9%
Value $42.37M Shares 360,000 Est. Cost Unrealized
RARE ULTRAGENYX PHARMACEUTICAL INC 3.2%
Value $34.53M Shares 497,899 Est. Cost $57.14 Unrealized 0.0%
MIRATI THERAPEUTICS INC 2.4%
Value $25.57M Shares 348,900 Est. Cost Unrealized
MYOKARDIA INC 2.3%
Value $24.88M Shares 478,574 Est. Cost $50.46 Unrealized
FIBROGEN INC 2.2%
Value $23.96M Shares 440,800 Est. Cost Unrealized
ASSEMBLY BIOSCIENCES INC 2.1%
Value $22.71M Shares 1,153,599 Est. Cost $8.38 Unrealized
EIGER BIOPHARMACEUTICALS INC 2.1%
Value $22.31M Shares 1,595,643 Est. Cost $11.49 Unrealized
MAGENTA THERAPEUTICS INC 1.9%
Value $21.05M Shares 1,277,787 Est. Cost $13.50 Unrealized
GOSS GOSSAMER BIO INC 1.5%
Value $16.73M Shares 772,096 Est. Cost $20.85 Unrealized 0.0%
CHIASMA INC 1.5%
Value $15.83M Shares 3,043,827 Est. Cost $5.00 Unrealized
KEZAR LIFE SCIENCES INC 1.4%
Value $15.19M Shares 856,471 Est. Cost $17.35 Unrealized
IRONWOOD PHARMACUTICALS INC 1.4%
Value $14.68M Shares 1,084,600 Est. Cost Unrealized
HARPOON THERAPEUTICS INC 1.2%
Value $12.66M Shares 1,336,423 Est. Cost $9.47 Unrealized
RCUS ARCUS BIOSCIENCES INC 1.1%
Value $12.37M Shares 990,146 Est. Cost $16.66 Unrealized -34.8%
MERSANA THERAPEUTICS INC 1.1%
Value $12.1M Shares 2,300,000 Est. Cost $5.26 Unrealized
RUBIUS THERAPEUTICS INC 1.1%
Value $11.7M Shares 646,228 Est. Cost $23.51 Unrealized
RYTM RHYTHM PHARMACEUTICALS INC 1.0%
Value $10.99M Shares 400,838 Est. Cost $27.64 Unrealized +4.0%
SURFACE ONCOLOGY INC 1.0%
Value $10.8M Shares 2,263,488 Est. Cost $10.40 Unrealized
FIBROGEN INC 0.8%
Value $9.152M Shares 168,382 Est. Cost $36.02 Unrealized
PRTA PROTHENA CORP PLC 0.8%
Value $8.813M Shares 726,519 Est. Cost $11.89 Unrealized +5.0%
RCKT ROCKET PHARMACEUTICALS INC 0.7%
Value $7.893M Shares 450,000 Est. Cost $16.60 Unrealized -4.9%
ABUS ARBUTUS BIOPHARMA CORP 0.7%
Value $7.779M Shares 2,172,883 Est. Cost $6.80 Unrealized -43.6%
ADURO BIOTECH INC 0.7%
Value $7.719M Shares 1,939,390 Est. Cost $3.98 Unrealized
UNITY BIOTECHNOLOGY INC 0.7%
Value $7.353M Shares 906,614 Est. Cost $15.06 Unrealized
SRRK SCHOLAR ROCK HOLDING CORP 0.6%
Value $6.364M Shares 338,668 Est. Cost $18.88 Unrealized -6.8%
AQUINOX PHARMACEUTICALS INC 0.6%
Value $6.107M Shares 2,265,880 Est. Cost $2.79 Unrealized
CURIS INC 0.5%
Value $5.935M Shares 2,982,208 Est. Cost $0.69 Unrealized
ZLAB ZAI LAB LTD 0.2%
Value $2.317M Shares 78,519 Est. Cost $20.92 Unrealized
VCEL VERICEL CORP 0.2%
Value $2.294M Shares 131,001 Est. Cost $18.29 Unrealized 0.0%
SNNAQ SIENNA BIOPHARMACEUTICALS INC 0.2%
Value $1.856M Shares 800,000 Est. Cost $2.71 Unrealized 0.0%
ARVN ARVINAS INC 0.1%
Value $738K Shares 50,000 Est. Cost $16.46 Unrealized +7.8%