William T. Gross (born 1958) is an American businessman.
He founded GNP Loudspeakers (now GNP Audio Video), an audio equipment manufacturer; GNP Development Inc., acquired by Lotus Software; Knowledge Adventure, an educational software company, later acquired by Cendant; and the business incubator Idealab in March, 1996, of which he serves as Chairman of the Board and Chief Executive Officer.
One company founded by Gross, GoTo.com, Inc., provided an Internet search engine which relied upon sponsored search results and pay-per-click advertisements. GoTo.com was later renamed Overture Services Inc. and was then acquired by Yahoo! to provide their Yahoo! Search Marketing products.
In 1996, Gross purchased the domain name answers.com, which was later sold to NetShepard and then to GuruNet.
In 2010, Gross founded and launched TweetUp, a search engine for Twitter that promotes the best tweeters on any topic. TweetUp was renamed to "PostUp" to reflect its inclusion of Facebook and LinkedIn status updates.
On January 24, 2011, PostUp acquired popular Twitter client app UberTwitter--after previously purchasing Echofon (for iPhone/iOS) and Twidroyd (for Android OS)--and renamed itself UberMedia.
A Gross company, Energy Innovations, is working on development of a rooftop concentrated photovoltaic solar collector for flat-roofed commercial buildings. They completed the world's largest corporate solar installation at Google's headquarters in 2006.
During 2010, Gross was the CEO of eSolar, a company that aims to make renewable energy cost-competitive with fossil fuel energy using CSP technology. eSolar builds an individual 46 MW power unit on 200 acres and can scale up to 500 MW or larger capacity with multiple units. The company has an order for a 100MW plant in India (in production) and a 500MW plant in China (forthcoming).
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