Exhibit 99.1

The table below specifies the date, quantity, weighted-average 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 past sixty days.  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 affected on the New York Stock Exchange or through Electronic Communication Networks.

Trade Date	Quantity	Weighted Average Price/Price Per Share Sold ($)	Range of Price ($)
9/13/2010	38,400	83.1298	82.9400 - 83.3500
9/14/2010	30,000	83.3300	83.0800 - 83.5700
9/15/2010	40,000	83.3432	82.9200 - 83.5300
9/16/2010	21,500	83.3018	83.0000 - 83.4700
9/17/2010	30,200	82.7362	82.7200 - 83.7000
	14,800	83.9578	83.7200 - 84.1400
9/20/2010	33,800	83.3669	82.8800 - 83.6400
9/21/2010	21,500	83.4191	83.1400 - 83.7000
9/22/2010	24,504	82.8053	82.4000 - 83.3600
	500	83.4200
9/23/2010	22,200	81.3636	81.0700 - 82.0400
	14,000	82.4679	82.1200 - 82.7500
9/24/2010	21,100	82.4171	82.0000 - 82.9600
	17,099	83.5466	83.0300 - 84.0000
	50,500	84.4651	84.0400 - 85.0000
	12,400	85.4071	85.2200 - 85.6300
9/27/2010	32,900	83.4839	82.8100 - 83.8000
9/28/2010	48,700	82.8208	82.3000 - 83.2700
	1,400	83.3143	83.3000 - 83.3300
9/29/2010	37,175	82.8148	82.3000 - 83.2900
	1,500	83.3033	83.3000 - 83.3100
9/30/2010	37,425	82.9184	82.5400 - 83.5300
	900	83.5856	83.5500 - 83.6200
10/1/2010	41,500	82.7247	82.3400 - 82.9500
10/4/2010	36,000	82.0691	81.6700 - 82.6500
	4,500	82.7578	82.7000 - 82.8000
10/5/2010	14,300	82.7504	82.0200 - 83.0100
	35,700	83.4385	83.0200 - 83.7200
10/6/2010	40,000	83.3644	82.8800 - 83.5100
10/7/2010	31,400	83.2751	82.8200 - 83.6400
10/8/2010	38,700	83.1617	82.9200 - 83.4000
10/11/2010	13,604	82.9951	82.6300 - 83.3000
10/12/2010	43,570	82.8037	82.3300 - 83.3250
	1,430	83.3353	83.3300 - 83.3500
10/13/2010	40,000	83.6819	83.4000 - 83.8400
10/14/2010	35,850	83.8210	83.4800 - 84.3800
10/15/2010	40,000	83.5914
10/18/2010	44,709	83.4085	83.2800 - 83.5700
10/19/2010	18,500	82.5278	82.2000 - 83.1700
	12,100	83.3085	83.2300 - 83.4100
10/20/2010	40,100	82.8724	82.4800 - 83.0900
10/21/2010	35,977	83.1437	82.9000 - 83.4600
10/22/2010	40,709	83.1653	82.8500 - 83.4200

Trade Date	Quantity	Weighted Average Price/Price Per Share Sold ($)	Range of Price ($)
10/25/2010	40,000	83.5798	83.3200 - 83.9150
10/26/2010	29,500	81.8466	81.4400 - 82.2100
	12,200	83.0034	82.9000 - 83.0900
10/27/2010	46,000	80.4475	80.1800 - 80.6300
	3,400	81.5691	81.3500 - 81.6600
10/28/2010	36,700	80.3813	80.1100 - 81.0800
10/29/2010	54,110	79.5094	78.9300 - 79.9200
	7,800	80.0901	79.9400 - 80.1400
11/1/2010	27,300	80.0192	79.7400 - 80.6600
	10,453	81.0325	80.7700 - 81.2500
11/2/2010	43,100	80.3813	80.2000 - 80.5600
11/3/2010	45,600	81.0204	80.8000 - 81.3500
11/4/2010	49,600	82.3055	82.0121 - 83.0100
	400	83.0450	83.0400 - 83.0500
11/5/2010	41,414	83.2395	82.6400 - 83.6000
	8,500	83.6906	83.6400 - 83.7500
11/8/2010	25,100	82.3829	82.1300 - 82.9600
11/9/2010	41,410	81.2014	80.7200 - 81.5200
	993	82.0899	82.0800 - 82.1000
11/10/2010	31,000	81.4112	80.8000 - 81.7900
	17,500	81.9378	81.8000 - 82.1400
11/11/2010	35,825	81.3094	81.0900 - 81.5800