{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-164529","form_type":"8-K","ticker":"ONTO","cik":"0000704532","company_name":"ONTO INNOVATION INC.","filed_at":"2026-04-21T23:59:59+00:00","discovered_at":"2026-05-14T18:02:33.653229+00:00","generated_at":"2026-05-15T05:13:12.197881+00:00","sec_items":["1.01","7.01","8.01","9.01"],"event_type":"m_and_a","sentiment":"positive","materiality_score":0.85,"calibrated_materiality_score":0.85,"confidence":"high","headline":"Onto Innovation to acquire 27% stake in Rigaku for $710M; strategic partnership deepened","bullets":["Purchase price ~$710M for 61.1M shares (27% of Rigaku) from Carlyle affiliate; expected close H2 2026.","Acquisition to accelerate joint X-ray/OCD process control solutions; already selected by two key customers.","Investment expected to be accretive as of Dec 31, 2026; Onto gets one board seat.","$500M bridge loan commitment from Goldman Sachs to help finance the deal and related expenses.","Market for CD-SAXS and metrology solutions estimated >$1B in five years per TechInsights."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-164529","json":"https://secwatch.observer/filing/0001193125-26-164529.json","markdown":"https://secwatch.observer/filing/0001193125-26-164529.md","text":"https://secwatch.observer/filing/0001193125-26-164529.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/704532/000119312526164529/0001193125-26-164529-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/704532/000119312526164529/d75499d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T05:13:12.197881+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"2f9d3ccbde8ca2cc6ecda9b8e82e7264afdae2ff","claim":"ONTO INNOVATION INC. entered into Share Purchase Agreement with Atom Investments, L.P. valued at approximately $710 million (effective 2026-04-21).","evidence_excerpt":"On April 21, 2026 (Tokyo time), Onto Innovation Inc. (the “Company”) entered into a Share Purchase Agreement (the “Purchase Agreement”), with Atom Investments, L.P. (the “Seller”), an affiliate of The Carlyle Group, pursuant to which the Company agreed to acquire 61,123,436 shares (27% of the issued and outstanding shares) of the common stock of Rigaku Holdings Corporation (“Rigaku”), from the Seller for an aggregate purchase price of approximately $710 million","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/704532/000119312526164529/0001193125-26-164529-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"asset purchase"},{"label":"Counterparty","value":"Atom Investments, L.P."},{"label":"Value","value":"approximately $710 million"},{"label":"Effective","value":"2026-04-21"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}