---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-241785"
form_type: "8-K"
ticker: "IDYA"
cik: "0001676725"
company_name: "IDEAYA Biosciences, Inc."
filed_at: "2023-09-26T23:59:59+00:00"
generated_at: "2026-06-10T08:42:52.258136+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# CFO Paul A. Stone resigns effective Nov 10, 2023; Andres Ruiz Briseno to lead finance

## Summary
- CFO Paul A. Stone voluntarily resigns, effective November 10, 2023, after Q3 10-Q filing.
- Resignation is to pursue other opportunities; not related to any disagreement with the company.
- Andres Ruiz Briseno, SVP Head of Finance and IR, remains principal accounting officer and will lead finance and IR functions.

## SEC filing metadata
- accession: 0001193125-23-241785
- form_type: 8-K
- ticker: IDYA
- cik: 0001676725
- company_name: IDEAYA Biosciences, Inc.
- filed_at: 2023-09-26T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1676725/000119312523241785/0001193125-23-241785-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1676725/000119312523241785/d537402d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-241785
- JSON: https://secwatch.observer/filing/0001193125-23-241785.json
- Plain text: https://secwatch.observer/filing/0001193125-23-241785.txt

## Key facts
- Executive change
  Paul A. Stone resigned as Chief Financial Officer at IDEAYA Biosciences, Inc..
  - Action: resigned
  - Role: Chief Financial Officer
  source text: On September 21, 2023, Paul A. Stone informed IDEAYA Biosciences, Inc. (the “Company”), of his voluntary resignation from his position as Chief Financial Officer of the Company. Mr. Stone’s resignation will be effective as of November 10, 2023
  evidence_url: https://www.sec.gov/Archives/edgar/data/1676725/000119312523241785/0001193125-23-241785-index.htm

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