.Warren Buffett's Berkshire Hathaway is now a $1 mountain business The Washington PostThese Asian firms in Buffett's Berkshire Hathaway profile have climbed, with one rising 30% CNBCWall Street only provided Warren Buffett an early birthday celebration present: Berkshire Hathaway is actually today worth $1 trillion CNNHow Long it Took U.S. Business to Connect With a $1 Trillion Appraisal Visual CapitalistBerkshire Hathaway covers $1 mountain market cap for first time as Buffett accelerates BofA share sales Yahoo Financing.