Aspen Insurance Holdings has sent a third letter to shareholders urging them to reject the proposed takeover offer from Endurance Specialty Holdings.
The news came as the Bermuda-based business said it expected to deliver $775m - $780m [£452m-£455m] for the second quarter of 2014.
In its preliminary announcement the provider also stated that the combined operating ratio should come in at 90-91%.
In addition Aspen reported that non-recurring items in the three months, including costs
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