Shareholders of both US insurer Markel Corporation and Bermuda-based insurer and reinsurer Alterra Capital Holdings Limited have voted in favour of the $2.98 billion acquisition agreed to by the two boards.The companies did not provide figures on the shareholder votes, which took place in Virginia and here in Bermuda.Shareholders of both parties were required to approve Markel’s acquisition of Alerra as a condition of the transaction.Under the terms of the deal, each Alterra common share is converted into the right to receive 0.04315 Markel common shares, plus a cash payment of $10.The joint proxy statement issued by the companies indicated that the deal was expected to close in the second quarter of 2013.Completion of the deal remains subject to receipt of regulatory approvals and other customary closing conditions.