Why does anybody even listen to Buffett?
So, he bought UNH. Ok, makes sense considering the heavy dip.
He also sold AAPL. Nothing happened there.

The news are delayed. The filings are from Q2.
He must have bought UNH higher, and people unironically pump his bags.

And AAPL? He must have sold that one lower, prior to the August pump.

Buy high, sell low.