---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-085569"
form_type: "8-K"
ticker: "ONTO"
cik: "0000704532"
company_name: "ONTO INNOVATION INC."
filed_at: "2025-06-12T23:59:59+00:00"
generated_at: "2026-05-19T11:44:05.148996+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# CFO Mark Slicer departs Onto Innovation effective June 12, 2025

## Summary
- CFO Mark Slicer's employment mutually terminated effective June 12, 2025.
- Separation not due to any disagreement on operations, policies, or practices.
- No successor CFO named; principal financial and accounting officer role vacant.

## SEC filing metadata
- accession: 0000950170-25-085569
- form_type: 8-K
- ticker: ONTO
- cik: 0000704532
- company_name: ONTO INNOVATION INC.
- filed_at: 2025-06-12T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/704532/000095017025085569/0000950170-25-085569-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/704532/000095017025085569/onto-20250612.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-085569
- JSON: https://secwatch.observer/filing/0000950170-25-085569.json
- Plain text: https://secwatch.observer/filing/0000950170-25-085569.txt

## Key facts
- Executive change
  Mark Slicer was terminated as Chief Financial Officer at ONTO INNOVATION INC..
  - Action: terminated
  - Role: Chief Financial Officer
  source text: On June 12, 2025, Onto Innovation, Inc. (the “Company” or “Onto Innovation”) and Mr. Mark Slicer, the Company’s Chief Financial Officer (“CFO”), agreed to mutually terminate Mr. Slicer’s employment with the Company, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/704532/000095017025085569/0000950170-25-085569-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.