Lending shares for short-selling is just what UBS does as a...

Lending shares for short-selling is just what UBS does as a business, right? I wouldn't describe it as them "allowing" to short sell, I'd think they just lend the shares to whoever wants to short and get their cut on it and they don't really care that much what happens after - they make their cut either way and they don't make the sell/buy themselves.

So I was just assuming that the constant ceasing/becoming substantial holder is not UBS itself, but the short sellers making their move.