Can we get some terminology correct? There is NO posek who permits Chalav Stam. Chalav Mehadrin is when it is supervised as per Shulchan Aruch and its Chalav Yisrael. Chalav HaCompanies must ALSO be Chalav Yisroel according to different principles of hashgocha, like the Chazon Ish. It’s laaz to imply people have Chalav Stam meaning zero acceptable hechsher from any Rav. That’s a din in Shulchan Aruch that NOBODY argues with.