I'm just playing investigator here. But my guess is he made some comments during the company wide meeting that may or may not have not been well received. Or maybe he wasn't listening during the meeting or not taking it serious i.e. trying to talk to them while the meeting was playing.
I know the first time I was with a coworker on a new job I was a bit shocked how little attention he actually gave to the quarterly meeting. Talking over them (while on mute) and although I didn't think much of it, maybe a manager thinks otherwise.
Basically it seems like he might have not been on his "best behavior".