Onto Innovation is trading 6.65% down at $328 in after-hours trading, likely reflecting profit-taking or positioning after a strong earnings-driven advance rather than a confirmed new catalyst.
- It closed at $351.16 on August 17, 2026.
- Second-quarter revenue was $343.1 million and earnings were $1.93 per share, beating estimates; backlog was above $1.1 billion, and management raised its second-half growth outlook.
- No fresh negative company-specific announcement was identified; broader markets were modestly lower.