Berkshire Hathaway profits jump 15% (BRKA, BRKB)

Berkshire Hathaway reported a 15% jump in profits Saturday alongside Chairman Warren Buffett's famed annual letter. 
During the fourth quarter, net income rose to $6.29 billion, or $3,823 a share, from $5.48 billion, or $3,333, in the prior year. Operating earnings, excluding some investment outcomes, were $2,665 a share. Analysts had estimated an average of $2,717, according to Bloomberg.
Berkshire's profits rose as Buffett's many investments in subsidiaries including the in