The U-turn has been caused by the recent turbulence in the global debt and equity markets, according to a regulatory statement by MMI in which it confirmed it had "reassessed" its opposition to the move and will not ask others to vote against it.
MMI has reserved the right to pursue a raft of nominations to Acxiom's board of directors should the deal fall through.
Last month, Acxiom reported a net loss of $11.5m (£5.8m) in its first financial quarter, due largely to costs relating to the pending takeover.
MMI has reserved the right to pursue a raft of nominations to Acxiom's board of directors should the deal fall through.
Last month, Acxiom reported a net loss of $11.5m (£5.8m) in its first financial quarter, due largely to costs relating to the pending takeover.