US-listed re/insurers XL Group, Arch Capital Group and Validus Holdings on Wednesday estimated Q4 charges from flooding that choked a wide swath of Thailand during the last half of 2011. XL expected hat it would post pretax losses of $135m to $185m from the flooding net of reinsurance and reinstatement premiums, with around two-thirds of losses tied to its insurance segment. The group also said that it would post an additional $35m in losses from disasters occurring during the first three quarters of 2011, primarily from US tornadoes, windstorms and flooding. Bermuda-based Arch Capital said that its Q4 charge from Thai flooding would be in a range of $35m to $65m net of reinsurance and reinstatement premiums, but warned that its final losses could be significantly different owing to the size and complexity of the catastrophe. The company's estimate is based on the assumption of total industry losses of $10bn to $20bn. Bermuda-based Validus said that its Q4 results would include a $55.5m flood-related charge net of reinstatement premiums, reinsurance, retrocessional and other recoveries, assuming total industry losses of $12bn.