2/8/16 Buffett Warren E 4 10% Owner² 1:8K Symetra Financial Corp. DONNELLEY FIN… File16/FA Berkshire Hathaway Inc. General Re Corp. General Reinsurance Corp. 6/24/13 Buffett Warren E 4 10% Owner² 1:12K Symetra Financial Corp. R R Donnelley … Filer/FA Berkshire Hathaway Inc. General Re Corp. General Reinsurance Corp. 1/21/10 General Reinsurance Corp. 3 10% Owner² 1:9K Symetra Financial Corp. R R Donnelley … Filer/FA Berkshire Hathaway Inc. Buffett Warren E General Re Corp. 11/3/08 General Reinsurance Corp. 4 10% Owner² 1:9K White Mountains Ins Group Ltd. R R Donnelley … Filer/FA Berkshire Hathaway Inc. Buffett Warren E General Re Corp.