I've never worked at a company that uses it (though I've worked somewhere with lots of very important Fortran) though I know someone who worked at a place with

I've never worked at a company that uses it (though I've worked somewhere with lots of very important Fortran) though I know someone who worked at a place with COBOL. But as others have said, banks and other large companies that started using computers a long time ago would have critical services written in COBOL.