In the letter, the legendary investor mused on his 64-year friendship with Charlie Munger and the extensive connections that emerged from his humble hometown in Nebraska. He outlined the acceleration of his giving plan to wind down his vast fortune through charitable organizations led by his children. He said Monday that he converted 1,800 Class A shares into 2.7 million Class B shares to fund the effort. Those shares are worth about $1.35 billion. He also offered life advice for leaders and workers alike facing tough decisions, and echoed his long-standing view of always betting on America.