AMKR and AMAT. Hold or trim

So I own both AMKR and AMAT. AMKR, my avg is 23.59, up about 225% now. AMAT, my avg is $175.67, up about 132% Wondering if they’re worth trimming positions and moving into something else at these valuations. AMKR is trading near all time highs in regard to PE and 3x averages while AMAT is pretty much at its peak PE but only 2x averages. It does seem crazy they’ve reached these multiples. But pretty much everything in this sector is at ridiculous multiples. Nevermind the rest of the market. So hard to decide on just that factor. Curious what others in this position have done with runners like this. Or what others who have positions in AMKR or AMAT think. Thoughts?