My definition of "company stan" isn't "stan of the company". But the people who will support all/most of that company automatically even with little knowledge,
Among Big 4:
- Most of the so called HYBE stans are just ARMYs,
- SM famously has a history of every fandom of senior group beefing with fandom of direct junior group, and bg stans vs gg stans,
- YG was the pioneer of company stan culture (their official website is yg family). But took a hit after 2019 incident,
- JYP also has the bgs vs ggs fighting as usual. But at least for the ggs side, if people like one gg then there is a high chance they'll have positive opinion on other ggs. I've seen many people stan every JYP gg from 2nd to 4th gen.