.Warren Buffett's Berkshire Hathaway is now a $1 mountain provider The Washington PostThese Asian companies in Buffett's Berkshire Hathaway portfolio have climbed, along with one escalating 30% CNBCWall Road simply gave Warren Buffett a very early birthday gift: Berkshire Hathaway is today worth $1 mountain CNNHow Long it Took U.S. Companies to Reach Out To a $1 Trillion Assessment Visual CapitalistBerkshire Hathaway covers $1 trillion market limit for first time as Buffett increases BofA stock purchases Yahoo Finance.