In fact, each of our five largest non-insurance companies – BNSF Iscar, Lubrizol, Marmon Group and MidAmerican Energy – delivered record operating earnings. In aggregate these businesses earned more than $9 billion pre-tax in 2011. Contrast that to seven years ago, when we owned only one of the five, MidAmerican, whose pre-tax earnings were $393 million. Unless the economy weakens in 2012, each of our fabulous five should again set a record, with aggregate earnings comfortably topping $10 billion. Full letter embedded below: BerkshireAnnualLetter2012