Up to 10 companies in the hot clean tech sector will go public in multibillion dollar offerings this year and as many will be acquired in equally significant deals, VantagePoint Venture Partners Chief Executive Alan Salzman told Reuters.

Silicon Valley's preeminent investor in the clean tech industry said in an interview at the World Economic Forum that the actions this year will be a validation of the sector's attractiveness to the investment community.

Salzman, whose venture capital firm is the world's largest investor in the sector, said he planned to double the size of his existing fund to $2.5 billion. As of last September, VantagePoint had invested half of the initial $1.25 billion fund.

The idea is we don't just talk, Salzman said. We are committed to do things ... Hopefully, we will be followed.

VantagePoint's clean technology investments include solar thermal company BrightSource Energy, electric car start-up Tesla Motors Inc and photovoltaic solar panel maker Miasole, among others.

(Reporting by Kenneth Li, editing by Gerald E. McCormick)

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