Ace Ltd estimated yesterday that superstorm Sandy cost the global insurer about $380 million after tax and reinsurance.Full-year operating earnings per share are now projected to be $7.43 to $7.53 after tax, the Zurich-based company said yesterday in a statement distributed by Business Wire.Bermuda-based Montpelier Re Holdings Ltd says its initial pretax net loss estimate for the fourth quarter will be approximately $95 million.That estimate, which is net of reinsurance recoveries and reinstatement premiums, is based on a combination of Montpelier’s proprietary CATM modelling analysis, an underwriting assessment of in-force contracts and a limited number of loss advices received from clients.Because of the uncertainties associated with the various inputs to the estimate, the reinsurer said its actual losses may differ significantly from the estimate.Sandy hit on October 29, killing more than 100 people, flooding New York City subways and ravaging beach towns from New Jersey’s Atlantic City to Bridgeport, Connecticut. The storm left tens of thousands homeless, cut power to more than 8 million homes, crippled mass transit and inflicted billions of dollars in infrastructure damage.