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AI brief of an SEC Form 8-K · Onto Innovation (ONTO)

Onto Innovation closes Semilab USA acquisition, updates Q4 revenue guidance

Neutral Impact 4 of 5 m&a Written later

Onto Innovation completed its acquisition of Semilab USA LLC on November 17, 2025, paying $432.3 million in cash, subject to customary adjustments, plus 641,771 newly issued common shares. The company also updated its fourth-quarter 2025 revenue guidance to $258 million to $275 million and said it expects the acquired product lines to contribute about $120 million of revenue in 2026.

Key points

  • Acquisition closed November 17, 2025: $432,310,000 in cash plus 641,771 shares of common stock issued to the seller
  • Q4 2025 revenue guidance set at $258 million to $275 million; acquisition expected to add $8 million to $10 million of revenue from closing through January 3, 2026
  • Acquisition expected to add $0.02 to $0.04 to fourth-quarter diluted EPS, excluding purchase accounting, and to be immediately accretive to margins
  • Company expects about $120 million of revenue from the acquired product lines in 2026, weighted toward the second half

The filing

CompanyOnto Innovation (ONTO)
Form8-K, current report
Filed with the SECNov 17, 2025, 8:17 AM ET
Accession number0001193125-25-283980

Items reported: 2.01 Acquisition or Disposition Completed3.02 Unregistered Equity Sale7.01 Regulation FD Disclosure

Read the filing on SEC.gov ↗

Written by AI (Anthropic Claude, claude-haiku-5-5) on Nov 8, 2026, 1:17 AM ET, from the text of the filing and its press-release exhibits only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on November 17, 2025.

Briefs are written by AI from the filing text (each brief's own page names the model) and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the model's reading of the filing for shareholders, not a price forecast. Not investment advice.