BHP Group is moving ahead with plans to exit thermal coal, according to people familiar with the matter, the latest move by the world’s biggest miners to retreat from the dirtiest fuel.

BHP is looking at options to divest the business that includes assets in Australia and Colombia, said the people, who asked not to be identified as the development has not been made public. There’s no guarantee the company will go ahead with a sale, the people said.

The decision demonstrates how growing climate-change pressure from investors and regulators is reshaping the future of extractive industries. Rival Rio Tinto...