The group includes private social - network Path, which raised $ 30 million at a valuation of $ 250 million last year; question - and - answer site Quora, which raised $ 50 million at a $ 400 million valuation last year; and
microblogging service Twitter, which raised $ 400 million in new funding and another $ 400 million to
buy out existing investors at an $ 8 billion valuation in 2011.