.Warren Buffett's Berkshire Hathaway is today a $1 mountain company The Washington PostThese Asian firms in Buffett's Berkshire Hathaway collection have climbed, with one skyrocketing 30% CNBCWall Street only provided Warren Buffett a very early birthday party present: Berkshire Hathaway is now worth $1 trillion CNNHow Long it Took U.S. Firms to Reach Out To a $1 Mountain Assessment Visual CapitalistBerkshire Hathaway tops $1 mountain market hat for first time as Buffett accelerates BofA share sales Yahoo Money management.