AOL’s acquisition of behavioural targeting company Tacoda, announced in July, has been given the green light by the US government.
The deal will see AOL picking up Tacoda’s online ad network, which claims to have access to around 130m people across 4,000 sites.
In a statement, the Federal Trade Commission said it had no objections to the merger – one of a recent spate of big acquisitions in the online ad space.
Financial terms of the deal haven’t been disclosed by the companies, but AOL is reported to have paid around $275m for the firm.
This month has already seen Microsoft receiving approval for its $6bn purchase of aQuantive, as well as Yahoo! tieing up its $650m buyout of online ad exchange Right Media.
Ad giant WPP completed its $650m acquisition of 24/7 Real Media in July, while Google is still waiting for clearance for its mammoth purchase of DoubleClick.
The purchase adds another string to AOL's online ad bow, which also includes Advertising.com, ad serving company AdTech, video ad firm Lightningcast and mobile ad network Third Screen Media.