Exhibit 99.1

The table below specifies the date, quantity, weighted-average sale price and range of price per share of Class B common stock of Berkshire Hathaway Inc. sold by Bill & Melinda Gates Foundation Trust (the “Trust”) during the period May 4, 2012 through July 5, 2012.   The Trust undertakes to provide upon request by the staff of the Securities and Exchange Commission full information regarding the number of shares sold at each separate price.  All of the transactions were effected on the New York Stock Exchange or through Electronic Communication Networks.

Trade Date	Quantity Sold	Weighted-Average Price Per Share Sold ($)	Range of Price ($)
5/4/2012	80,000	80.9534	80.55 -	81.24
5/7/2012	49,025	81.7857	81.19 -	82.18
5/7/2012	30,975	82.3597	82.19 -	82.55
5/8/2012	80,000	81.9842	81.535 -	82.41
5/9/2012	80,000	81.7007	81.52 -	81.97
5/10/2012	80,000	81.7898	81.61 -	82.32
5/11/2012	80,000	81.8105	81.41 -	82.16
5/14/2012	80,000	80.7655	80.49 -	81.13
5/15/2012	80,000	80.4454	80.15 -	80.87
5/16/2012	80,000	80.7176	80.45 -	81.07
5/17/2012	80,000	80.2671	79.96 -	80.86
5/18/2012	76,800	79.0287	78.65 -	79.64
5/18/2012	3,200	79.7827	79.665 -	79.875
5/21/2012	80,000	79.4837	79.00 -	79.85
5/22/2012	56,700	79.6104	79.25 -	80.24
5/22/2012	23,300	80.4325	80.255 -	80.775
5/23/2012	73,150	79.1953	78.69 -	79.685
5/23/2012	6,850	79.7348	79.69 -	79.80
5/24/2012	80,000	79.5739	79.225 -	79.87
5/25/2012	80,000	79.3256	79.00 -	79.94
5/29/2012	80,000	79.5591	79.25 -	79.91
5/30/2012	80,000	79.0122	78.63 -	79.45
5/31/2012	51,128	78.8166	78.33 -	79.32
5/31/2012	28,872	79.5014	79.34 -	79.83
6/1/2012	80,000	79.0140	78.42 -	79.38
6/4/2012	80,000	78.8330	78.50 -	79.07
6/5/2012	80,000	79.0435	78.85 -	79.21
6/6/2012	46,860	79.7248	79.20 -	80.195
6/6/2012	33,140	80.2909	80.20 -	80.42
6/7/2012	80,000	80.8636	80.40 -	81.22
6/8/2012	80,000	81.0558	80.55 -	81.30
6/11/2012	78,167	80.6412	80.22 -	81.21

Trade Date	Quantity Sold	Weighted-Average Price Per Share Sold ($)	Range of Price ($)
6/11/2012	1,833	81.2671	81.22 -	81.38
6/12/2012	80,000	80.9574	80.37 -	81.22
6/13/2012	80,000	80.6062	80.255 -	81.10
6/14/2012	80,000	81.4377	81.09 -	81.97
6/15/2012	80,000	82.2894	82.12 -	82.49
6/18/2012	80,000	82.2768	82.15 -	82.47
6/19/2012	80,000	82.8839	82.46 -	83.025
6/20/2012	79,295	82.4403	81.955 -	82.93
6/20/2012	705	83.00
6/21/2012	68,500	81.3448	81.04 -	82.03
6/21/2012	11,500	82.2107	82.04 -	82.48
6/22/2012	80,000	81.6459	81.035 -	82.01
6/25/2012	72,000	80.7168	80.445 -	81.05
6/26/2012	71,100	81.2441	80.73 -	81.71
6/26/2012	900	81.7367	81.73 -	81.75
6/27/2012	72,000	81.9697	81.77 -	82.375
6/28/2012	55,430	81.3699	81.02 -	82.015
6/28/2012	16,570	82.1581	82.02 -	82.24
6/29/2012	72,000	83.0658	82.75 -	83.32
7/2/2012	99,200	83.2724	82.87 -	83.59
7/3/2012	99,200	83.6316	83.50 -	83.86
7/5/2012	99,200	83.4379	83.69 –	83.17