No product, service, or strategy is sacred. Change is hard, but the regulars in the 500 are willing and able to change all those things as a shifting environment demands. IBM (Fortune 500) (No. 20) used to make meat choppers and cheese slicers. , General Electric (Fortune 500) (No. 8) made computers and cannons. You can't get and stay big enough for the 500 without adapting continually. ,
Wal-Mart retook the top spot, Berkshire Hathaway made the top five, and Apple grew enormously.