The closing was widely anticipated after the April 2026 announcement, so the stock reaction is likely muted. Monitor for updates on the strategic collaboration and any revenue contributions from Rigaku. Also watch for potential dilution if the convertible notes are converted into common stock.
Price Chart
Executive Summary
Onto Innovation completed its previously announced acquisition of a 27% minority equity stake in Rigaku Holdings Corporation for approximately $720 million, funded via 0.00% Convertible Senior Notes due 2031. The investment deepens a strategic collaboration to advance X-ray-based process control for semiconductor manufacturing, but Onto will not consolidate Rigaku's financial results and will account for the stake under the fair value option. The closing is a procedural step with no new financial guidance or material changes to Onto's operations.
Key Facts
- Acquired 27% of Rigaku Holdings Corporation (61,123,436 shares) for approximately $720 million.
- Investment funded via 0.00% Convertible Senior Notes due 2031 (indenture filed May 21, 2026).
- Onto will account for the investment under the fair value option and will not consolidate Rigaku's results.
- Onto will nominate a director to Rigaku's board.
- Strategic collaboration targets next-generation X-ray process control solutions for semiconductor manufacturing.
Financial Impact
$720 million cash deployment funded by zero-coupon convertible debt; no immediate revenue or earnings impact; investment subject to fair value mark-to-market.
Risk Factors
- Strategic benefits from the Rigaku partnership may take years to materialize or may fail to meet expectations.
- Fair value accounting could introduce earnings volatility from mark-to-market adjustments on the minority stake.
- Convertible notes represent potential future dilution if converted into common stock.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 5 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 8-K Filing (Primary) | 0001193125-26-341337 |
| Document: d125405dex991.htm | 0001193125-26-341337 |
| Document: 0001193125-26-341337-index-headers.html | 0001193125-26-341337 |
| Document: 0001193125-26-341337-index.html | 0001193125-26-341337 |
| Document: 0001193125-26-341337.txt | 0001193125-26-341337 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 10, 2026 7w ago | 8-K | $291.35 $281.11 | ▼ −3.51% | ▼ −2.60% | $332.28 (+14.05%) |
Jun 13, 2026 15w ago | Institutional Cluster | $335.96 $304.21 | ▼ −9.45% | ▼ −8.70% | $332.28 (−1.09%) |
Jun 11, 2026 16w ago | Institutional Cluster | $303.53 $317.02 | ▲ +4.44% | ▲ +2.55% | $332.28 (+9.47%) |
May 18, 2026 19w ago | 8-K | $254.53 $316.15 | ▲ +24.21% | ▲ +22.63% | $332.28 (+30.55%) |
Apr 16, 2026 24w ago | 8-K | $267.15 $276.97 | ▲ +3.68% | ▼ −2.14% | $332.28 (+24.38%) |
US Market Status
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