Data storage company Actifio raises $100m

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Actifio, a data-storage operation, has raised $100 million in new funding, one of the largest investment deals for a privately held Boston-area technology company in recent years.

The funding round valued the Waltham company at $1 billion, more than for a number of publicly traded tech companies in the area, including Brightcove, Constant Contact, and

Boston rarely has had a venture capital-funded tech firm achieve a billion-dollar valuation prior to going public. A report by Dow Jones VentureSource in 2012, for instance, found 20 venture-backed US companies that sported such valuations, and just one had a major presence in Greater Boston at the time — Kayak.

Actifio Inc.’s founder and chief executive, Ash Ashutosh, said the company raised the money to accelerate its growth, particularly its global expansion.

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