White Mountains Insurance Group, Ltd. Back to Search White Mountains Insurance Group, Ltd. Categories Insurance 23 South Main Street, Unit 3B , Hanover , NH , 03755 United States (603) 640-2200 (603) 643-4562 www.whitemountains.com Contacts Primary Rob Seelig Managing Director & General Counsel Dave Staples Allan Waters Share × Print Email Facebook LinkedIn Twitter Pinterest Powered By GrowthZone