---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-423433"
form_type: "8-K"
ticker: "ERAS"
cik: "0001761918"
company_name: "Erasca, Inc."
filed_at: "2026-10-16T13:00:14+00:00"
generated_at: "2026-10-16T13:01:05.091119+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Erasca COO Nicholas Chetwyn to exit Nov 2 as company realigns leadership for RAS programs

## Summary
- Chief Operating Officer Nicholas (Nik) Chetwyn, Ph.D. will terminate employment effective November 2, 2026; Erasca decided on the realignment October 15, 2026.
- COO responsibilities are transitioning to other members of the leadership team to streamline the reporting structure; no successor was named.
- Erasca said the change supports development and potential commercialization of its RAS-targeting programs.
- Filing discloses no severance, transition agreement, or compensation terms for Chetwyn's departure.

## SEC filing metadata
- accession: 0001193125-26-423433
- form_type: 8-K
- ticker: ERAS
- cik: 0001761918
- company_name: Erasca, Inc.
- filed_at: 2026-10-16T13:00:14+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1761918/000119312526423433/0001193125-26-423433-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1761918/000119312526423433/eras-20261015.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-423433
- JSON: https://secwatch.observer/filing/0001193125-26-423433.json
- Plain text: https://secwatch.observer/filing/0001193125-26-423433.txt

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