Argo Group International Holdings, Ltd. announced a preliminary pre-tax catastrophe loss estimate for the three-month period ended December 31, 2017 of $34 million-$38 million, net of ceded reinsurance recoverable, reinstatement premiums and expected profit commissions. Catastrophe losses are primarily related to the wildfires in California and to certain aggregate excess of loss contracts that were impacted by various 2017 catastrophe and weather related events.