Northeastern insurers will be hit, but not mortally Property and casualty insurers in the Northeast will be the hardest hit. Allstate ( NYS: ALL ), the second-largest insurer with nearly 11% of the market share, had adjusters in place early, as did Travelers ( NYS: TRV ) and Chubb ( NYS: CB ). Hartford Financial ( NYS: HIG ), based in Connecticut, along with Erie Indemnity and Tower Group, are also within the top 10 insurers in the parts of the country where Sandy is making its presence felt.