Warren Buffett’s Berkshire Hathaway (BRK.A, BRK.B) disclosed this morning that its stake in Apple rose to $40.7B as of March 31, 2018, or the end of Q1. Approximately 68% of Berkshire’s $172.98B aggregate fair value was concentrated in five companies: American Express (AXP) at $14.1B; Apple at $40.7B; Bank of America (BAC) at $21B; Coca-Cola (KO) at $17.4B and Wells Fargo (WFC) at $25.2B. At December 31, 2017, Berkshire’s stake in Apple was $28.2B.