Berkshire Hathaway Inc. reported consolidated earnings results for the first quarter ended March 31, 2013. For the quarter, the company reported operating earnings of $3,782 million against $2,665 million a year ago. Net earnings attributable to company's shareholders were $4,892 million against $3,245 million a year ago. Operating earnings per class A equivalent share were $2,302 against $1,615 a year ago. Net earnings per class A equivalent share attributable to company's shareholders were $2,977 against $1,966 a year ago. At March 31, 2013, the company's book value had increased by 5.5% since year end 2012 to $120,525 per Class A equivalent share.

Berkshire Hathaway Inc. announced the appointment of Meryl Witmer, a principal at Eagle Capital Partners to its board of directors.

Berkshire Hathaway Inc. reported consolidated earnings results for the fourth quarter and full year ended December 31, 2012. For the quarter, the company reported operating earnings of $2,813 million against $2,666 million a year ago. Net earnings attributable to company's shareholders was $4,551 against $3,048 million a year ago. Operating earnings per class A equivalent share was $1,704 against $1,615 a year ago. Net earnings per class A equivalent share attributable to company's shareholders was $2,757 against $1,846 a year ago. For the year, the company reported operating earnings of $12,597 million against $10,775 million a year ago. Net earnings attributable to company’s shareholders were $14,824 against $10,254 million a year ago. Operating earnings per class A equivalent share was $7,629 against $6,531 a year ago. Net earnings per class A equivalent share attributable to company's shareholders was $8,977 against $6,215 a year ago. Book value per class A equivalent share at December 31, 2012 was $114,214 against $99,860 a year ago.