Onto Innovation is trading 4.8% down now at $278.66, with the immediate catalyst unclear.
- Fell from the August 27 close of $292.62; no new August 28 announcement, filing, earnings update, or analyst action directly explains the decline.
- Latest major developments were the August 6 results and August 10 Rigaku investment.
- Semiconductor sentiment is mixed, while major indexes are only modestly higher.