Results were announced three days after Buffett revealed the biggest acquisition in his 44 years running Berkshire, a $26 billion takeover of Burlington Northern Santa Fe Corp. Berkshire had already owned 23 per cent of the nation's second-largest railroad operator. Third-quarter net income for Omaha, Nebraska-based Berkshire rose to $3.24 billion, or $2,087 per Class A share, from $1.