secwatch.observer — SEC 8-K summary
======================================

Issuer:     ONTO INNOVATION INC. (ONTO)
CIK:        0000704532
Form:       8-K
Filed at:   2026-04-21T23:59:59+00:00
Accession:  0001193125-26-164529
Event type: m_and_a
Sentiment:  positive
Materiality: 0.85
Item codes: 1.01, 7.01, 8.01, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

Onto Innovation to acquire 27% stake in Rigaku for $710M; strategic partnership deepened
--------------------------------------------------------------------------------

- 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.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/704532/000119312526164529/0001193125-26-164529-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/704532/000119312526164529/d75499d8k.htm
  HTML page:      https://secwatch.observer/filing/0001193125-26-164529

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer