The news came just days after Mr Buffett's company revealed that it was to buy railroad operator Burlington North Santa Fe Corporation (BNSF).
His firm will pay $100 a share to take over BNSF, in a deal worth $44 billion that includes Berkshire Hathaway taking on $10 billion worth of existing BNSF debt.
Net income in the third quarter rose to $3.2 billion from just more than $1 billion in the same period last year.
Berkshire Hathaway shareholders have seen the value of their investments rise in line with the company's net income.
Last year, Class A shares made investors net earnings per share worth $682, dividends now worth $2,087.
But operating earnings for the first nine months of the year have dropped in comparison with 2008.
They fell to $5.5 billion, down from $6.3 billion this time last year.
By Claire Archer