---
schema_version: "secwatch.filing_event.v1"
accession: "0001827506-24-000086"
form_type: "8-K"
ticker: null
cik: "0001827506"
company_name: "Tourmaline Bio, Inc."
filed_at: "2024-10-10T23:59:59+00:00"
generated_at: "2026-05-30T16:50:13.708120+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Tourmaline Bio CMO Dr. Yung Chyung resigns effective Oct 31, 2024

## Summary
- Dr. Yung Chyung resigns as Chief Medical Officer effective October 31, 2024.
- Resignation is voluntary to pursue other opportunity; no disagreement with company.
- He will stay through Oct 31 to assist transition; duties assumed by senior management.
- Company has initiated a search for his successor.

## SEC filing metadata
- accession: 0001827506-24-000086
- form_type: 8-K
- cik: 0001827506
- company_name: Tourmaline Bio, Inc.
- filed_at: 2024-10-10T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1827506/000182750624000086/0001827506-24-000086-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1827506/000182750624000086/trml-20241004.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001827506-24-000086
- JSON: https://secwatch.observer/filing/0001827506-24-000086.json
- Plain text: https://secwatch.observer/filing/0001827506-24-000086.txt

## Key facts
- Executive change
  Dr. Yung Chyung departed as Chief Medical Officer at Tourmaline Bio, Inc..
  - Action: resign
  - Role: Chief Medical Officer
  source text: On October 4, 2024, Dr. Yung Chyung gave notice of his decision to resign from his position as Chief Medical Officer of Tourmaline Bio, Inc. (the “Company”) in order to pursue another opportunity.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1827506/000182750624000086/0001827506-24-000086-index.htm

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