White Mountains Insurance Group, Ltd. Watch

from 8-K 121 pages Execution Version [[5828813]] Securities Purchase Agreement by and Among Riser Merger Sub, Inc., as Purchaser, White Mountains Catskill Holdings, Inc., as Holdings, White Mountains Holdings (Luxembourg) S.À R.L., as the Holdings Seller and the Sellers’ Representative, the Individuals Set Forth on the Signature Pages Hereto, as the Management Sellers, and Nsm Insurance Holdco, LLC, as the Company Dated as of May 9, 2022 [Certain Identified Information Has Been Excluded From This Exhibit Because It Is Both Not Material and Is the Type That the Registrant Treats as Private and Confidential.]

from 8-K 66 pages Plan of reorganization, merger, acquisition or similar

from 8-K 71 pages Execution Version Certain Identified Confidential Information Contained in This Document, Marked by Brackets, Has Been Excluded From This Exhibit Because It Is Both (I) Not Material and (II) Would Be Competitively Harmful if Publicly Disclosed. Management Warranty Deed City Point, 1 Ropemaker Street London, Ec2y 9aw

from 8-K 72 pages Plan of reorganization, merger, acquisition or similar

from 8-K 27 pages Tax Matters Agreement by and Among General Reinsurance Corporation Berkshire Hathaway Inc. White Mountains Insurance Group, Ltd. and Railsplitter Holdings Corporation as of March 8, 2008

from 8-K 49 pages Exchange Agreement by and Among Berkshire Hathaway Inc. General Reinsurance Corporation White Mountains Insurance Group, Ltd. and Railsplitter Holdings Corporation as of March 8, 2008