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Venture Capital DealsActifio, a Waltham, Mass.-based provider of copy data virtualization solutions, has raised $100 million in new VC funding at a pre-money valuation of around $1 billion. Tiger Global Management led the round, and was joined by return backers North Bridge Venture Partners, Greylock Partners, Advanced Technology Ventures, Andreessen Horowitz and Technology Crossover Ventures. CEO Ash Ashutosh tells Fortune MORE