advent international alpinvest partners american capital strategies apax partners apollo management bc partners bain capital berkshire partners blackstone group bridgepoint capital british coal british rail ccmp capital cvc capital partners cerberus capital management charterhouse capital partners eqt partners early history of private equity financial endowment finmeccanica first reserve corporation fortress investment group fund of funds general atlantic goldman sachs growth capital high net worth individual history of private equity and venture capital industry kohlberg kravis roberts lehman brothers leveraged buyout limited company list of private equity firms london madison dearborn partners mezzanine capital milan nordic capital oak investment partners oaktree capital management onex corporation pai partners pacific equity partners paris pension fund permira pizza express private equity private equity fund private equity secondary market providence equity partners rocket silver lake partners sovereign wealth fund summit partners sun capital partners ta associates tpg capital terra firma capital partners united kingdom venture capital warburg pincus website