13D Filing: Warren E Buffett and Berkshire Hathaway Inc (BRK.A)

Item 5 of this Schedule 13D is amended to add the following:

(a)-(b) Mr. Buffett owns, and has the sole power to vote and to dispose of, 282,611 shares of Class A Common Stock and 194,895
shares of Class B Common Stock, representing approximately 36.79% of the outstanding shares of Class A Common Stock, 0.01% of the outstanding shares of Class B Common Stock, 31.41% of the aggregate voting power of the outstanding shares of both
classes, and 17.19% of the economic interest of the outstanding shares of both classes.

(c) On July 10, 2017, Mr. Buffett
converted 12,500 shares of Class A Common Stock into 18,750,000 shares of Class B Common Stock.

On July 10, 2017,
Mr. Buffett donated 14,220,001 shares of Class B Common Stock to the Bill and Melinda Gates Foundation pursuant to his previously announced irrevocable pledge to this foundation.

On July 10, 2017, Mr. Buffett donated 1,422,000 shares of Class B Common Stock to the Susan Thompson Buffett Foundation pursuant to
his previously announced irrevocable pledge to this foundation.

On July 10, 2017, Mr. Buffett donated 995,396 shares of Class B
Common Stock to each of the Sherwood Foundation, the Howard G. Buffett Foundation and the NoVo Foundation pursuant to his previously announced irrevocable pledges to these foundations.