REVENUE : US $ 611.3BN EMPLOYEES : 2.1 MILLION CEO : DOUG MCMILLON FOUNDED : 1962

The world ’ s biggest retailer is on a mission to reduce its Scope 3 emissions – and is succeeding . CEO Doug McMillon has proudly said that Walmart ’ s suppliers have avoided , reduced or sequestered one billion metric tonnes of greenhouse gas emissions from their value chains – more than the annual emissions for Germany – six years ahead of schedule . Not only does this come alongside record high share prices for the company , but it also puts it on track to hit net zero by 2040 .