.Warren Buffett's Berkshire Hathaway is now a $1 mountain firm The Washington PostThese Asian firms in Buffett's Berkshire Hathaway portfolio have surged, with one escalating 30% CNBCWall Road just provided Warren Buffett a very early birthday party present: Berkshire Hathaway is now worth $1 trillion CNNHow Long it Took U.S. Providers to Reach a $1 Trillion Evaluation Visual CapitalistBerkshire Hathaway covers $1 mountain market limit for very first time as Buffett increases BofA assets sales Yahoo Finance.