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AppNexus announced the buyout of Xaxis' ad-serving technology to enhance WPP's programmatic offering.
The WPP-owned Xaxis will enter into a partnership with AppNexus, with WPP investing $25 million, adding to the $85 million in funding the company recently raised at a valuation of $1.2 billion.
As per the terms of the agreement, AppNexus will buy Xaxis'...