I can think of a few examples, but none of the ones that come to mind are only the repository as its own company. Instead the repository is hosted by a for-profit company that is also primary host of the language itself. For example, D's main repository is hosted by Digital Mars, also the creator and lead steward of the language. And Tcl's main repository for a while was hosted by Scriptics, which was founded by Tcl's creator and also employed most of its core devs.