WESCO FINANCIAL CORPORATION




SPECIAL MEETING OF SHAREHOLDERS

A special meeting of the shareholders of Wesco Financial Corporation ("Wesco") will be held at the University Club of Pasadena, 175 North Oakland Avenue, Pasadena, California 91101, on Friday, June 24, 2011, at 10:00 a.m., local time. Wesco's Board of Directors has fixed May 16, 2011, as of the close of business, as the record date for the determination of shareholders entitled to notice and to vote at the meeting or any adjournments or postponements thereof.

Only shareholders of record of Wesco and their proxies are invited to attend the special meeting in person.

At the meeting, shareholders will be asked to approve the Agreement and Plan of Merger, dated as of February 4, 2011, by and among Berkshire Hathaway Inc., a Delaware corporation ("Berkshire"), Montana Acquisitions, LLC, a limited liability company and an indirect wholly owned subsidiary of Berkshire ("Merger Sub"), and Wesco, as amended by the Amendment to Agreement and Plan of Merger, dated as of April 15, 2011, pursuant to which Wesco will be merged with and into Merger Sub (the "merger"), with Merger Sub continuing as the surviving entity. Following the merger, Wesco will cease to exist as a publicly traded company and Merger Sub will change its name to "Wesco Financial, LLC."

There will not be a question and answer session with Charles T. Munger at the special meeting.

Proxy Statement and Form of Proxy for the Special Meeting of Shareholders