Aon┬áset to gain conditional EU antitrust approval for its $30 billion bid for Willis Towers Watson, people familiar with the matter said, clearing a key hurdle to becoming the world’s No. 1 insurance broker.

London-headquartered Aon, which clinched the deal a year ago to create the world’s largest insurance broker ahead of Marsh & McLennan Companies Inc, offered concessions to the European Commission earlier this month.

Aon’s shares reversed losses and gained as much as 1.2% after the Reuters story while Willis also trimmed losses and rose 2.9%.

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