Red Hat has now spent 25 years developing and supporting Linux and other related open-source projects. Originally started by Bob Young and Marc Ewing in a small residential room, it has now grown to have annual revenue of US$2.9 billion and 11,400 employees, making it the largest open-source based company in the world.
https://www.notebookcheck.net/Red-Hat-reaches-the-quarter-century-milestone.292942.0.html