• Onto Innovation plans a private offering of USD 1.1 billion convertible senior notes due 2031, with an option for initial purchasers to buy up to an additional USD 165 million.
• Total potential issuance size of up to USD 1.27 billion.
• Proceeds earmarked for capped call transactions, up to about USD 300 million of concurrent share repurchases, with the balance for general corporate purposes including a planned 27% stake purchase in Rigaku Holdings.
• The senior unsecured notes mature June 1, 2031, unless earlier converted, redeemed, or repurchased.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Onto Innovation Inc. published the original content used to generate this news brief via Business Wire (Ref. ID: 202605180732BIZWIRE_USPR_____20260515_BW168831) on May 18, 2026, and is solely responsible for the information contained therein.