"KPCB was formed in 1972. KPCB is highly selective in the companies it invests in, and it aims to build "category defining companies" that will become leaders in the field. It has traditionally focused on early-stage investments, but also does later-stage investments. KPCB is highly respected within the industry, and is regarded as having the best track record of building world-class companies"
"Khosla Ventures: The firm was founded in 2004 by Vinod Khosla, a former general partner of Kleiner Perkins Caufield & Byers. The firm's first two investment vehicles were funded with Khosla's own personal capital and were not open to institutional investors"
Oh and then there's Intel and Google rounding it out.