.Warren Buffett's Berkshire Hathaway is now a $1 trillion business The Washington PostThese Asian companies in Buffett's Berkshire Hathaway collection have surged, with one soaring 30% CNBCWall Street merely provided Warren Buffett a very early birthday celebration gift: Berkshire Hathaway is now worth $1 mountain CNNHow Long it Took USA Companies to Get To a $1 Trillion Appraisal Visual CapitalistBerkshire Hathaway tops $1 trillion market limit for very first time as Buffett accelerates BofA stock sales Yahoo Money.