---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-012240"
form_type: "8-K"
ticker: "ERAS"
cik: "0001761918"
company_name: "Erasca, Inc."
filed_at: "2023-04-10T23:59:59+00:00"
generated_at: "2026-06-17T04:15:02.230016+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Erasca announces departure of CMO Wei Lin, promotion of Shannon Morris as new CMO

## Summary
- CMO Wei Lin resigned to pursue other opportunities; last day April 21, 2023, no disagreement cited.
- Shannon Morris, former SVP Clinical Development, promoted to CMO effective April 10, 2023.
- Dr. Morris brings 20+ years oncology experience; led Cosela NDA at G1 Therapeutics and Imfinzi BLA at MedImmune.
- New employment terms: base salary $470,000, 40% target bonus, and option to purchase 375,000 shares vesting monthly.
- Dr. Morris reclassified from Tier 2 to Tier 1 Covered Employee under Severance Plan.

## SEC filing metadata
- accession: 0000950170-23-012240
- form_type: 8-K
- ticker: ERAS
- cik: 0001761918
- company_name: Erasca, Inc.
- filed_at: 2023-04-10T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1761918/000095017023012240/0000950170-23-012240-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1761918/000095017023012240/eras-20230404.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-012240
- JSON: https://secwatch.observer/filing/0000950170-23-012240.json
- Plain text: https://secwatch.observer/filing/0000950170-23-012240.txt

## Key facts
- Executive change
  Wei Lin resigned as Chief Medical Officer at Erasca, Inc..
  - Action: resigned
  - Role: Chief Medical Officer
  source text: On April 4, 2023, Wei Lin, M.D. notified Erasca, Inc. (the “Company”) of his decision to resign from his position as Chief Medical Officer of the Company to pursue other opportunities.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1761918/000095017023012240/0000950170-23-012240-index.htm
- Executive change
  Shannon R. Morris was appointed as Chief Medical Officer at Erasca, Inc..
  - Action: promoted
  - Role: Chief Medical Officer
  source text: Effective as of April 10, 2023, Shannon R. Morris, M.D., Ph.D. has been promoted to the position of the Chief Medical Officer of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1761918/000095017023012240/0000950170-23-012240-index.htm

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