Onto Innovation is higher today after unveiling a capital-and-business alliance centered on a planned purchase of a 27% stake in Rigaku, a move that reframes Onto as a more vertically integrated player in semiconductor metrology. The transaction value is about $710 million and is expected to close in the second half of 2026, subject to regulatory approvals.

The market reaction reflects expectations that combining Rigaku’s X-ray hardware with Onto’s process-control and analytics software can deepen Onto’s positioning in advanced packaging and leading-edge process control—areas benefiting from AI-driven semiconductor complexity. A minority stake paired with a commercial alliance can also accelerate go-to-market execution versus a simple supplier relationship, potentially expanding Onto’s served market in metrology over time.

Rigaku disclosed that Onto plans to buy roughly 61.1 million shares (about 27% of Rigaku) from an existing shareholder, with completion targeted for 2H 2026 pending approvals. Near-term investor focus is on whether the partnership produces customer wins, how quickly joint solutions are commercialized, and what the cash outlay implies for Onto’s capital allocation (including any changes to buybacks or M&A pace).