Pretax earnings including investment income for Berkshire Hathaway's insurance group, which includes General Reinsurance Corp., Berkshire Hathaway Primacy Group and personal lines insurer GEICO as well as Berkshire Hathaway Reinsurance Group, rose 35.7% from that of second quarter 2015, to $1.75 billion. For the first six months of the year, the insurance group's pretax earnings rose 3.7%, to $3.24 billion.