The market cap of Warren Buffett's Berkshire Hathaway (BRK.B) is about $1 trillion.
Its equity portfolio – concentrated in blue chip stocks Apple (AAPL), American Express (AXP), Coca-Cola (KO), Bank of America (BAC) and Chevron (CVX) – is worth about $250 billion. Subtract Berkshire's cash and cash equivalents of about $350 billion and that means the core operations' contribution to Berkshire's market value comes to about $600 billion.
