Ridgeback Capital Investments

Ridgeback Capital Investments as of Sept. 30, 2011

Portfolio Holdings for Ridgeback Capital Investments

Ridgeback Capital Investments holds 5 positions in its portfolio as reported in the September 2011 quarterly 13F filing

Company (Ticker) Portfolio Weight Valued At Change in Shares Share Count Share Price
Ironwood Pharmaceuticals (IRWD) 69.4 $88M 8.2M 10.80
Medicines Company 16.2 $21M 1.4M 14.88
Pharmasset 8.4 $11M 130k 82.37
Regeneron Pharmaceuticals (REGN) 5.1 $6.5M 112k 58.20
MarketAxess Holdings (MKTX) 0.8 $1.0M 40k 26.02