---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-311373"
form_type: "8-K"
ticker: "STTK"
cik: "0001680367"
company_name: "Shattuck Labs, Inc."
filed_at: "2021-10-28T23:59:59+00:00"
generated_at: "2026-06-28T16:52:01.627700+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Shattuck Labs appoints Dr. Carrie Brownstein to board; George Golumbeski named Chairman

## Summary
- Josiah Hornblower resigned as director and Chairman effective October 22, 2021; no dispute with company.
- Independent director George Golumbeski appointed Chairman of the Board.
- Dr. Carrie Brownstein, CMO of Cellectis, appointed as Class I director and to Nominating and Corporate Governance Committee.
- Brownstein brings over 15 years of oncology/rare disease drug development experience from Roche, Regeneron, Celgene.

## SEC filing metadata
- accession: 0001193125-21-311373
- form_type: 8-K
- ticker: STTK
- cik: 0001680367
- company_name: Shattuck Labs, Inc.
- filed_at: 2021-10-28T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680367/000119312521311373/0001193125-21-311373-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680367/000119312521311373/d245532d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-311373
- JSON: https://secwatch.observer/filing/0001193125-21-311373.json
- Plain text: https://secwatch.observer/filing/0001193125-21-311373.txt

## Key facts
- Executive change
  Josiah Hornblower resigned as Chairman of the Board at Shattuck Labs, Inc..
  - Action: resigned
  - Role: Chairman of the Board
  source text: On October 22, 2021, Josiah Hornblower notified the board of directors (the “Board”) of Shattuck Labs, Inc. (the “Company”) of his intent to resign as a director and Chairman of the Board, effective as of such date.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1680367/000119312521311373/0001193125-21-311373-index.htm
- Executive change
  Dr. Carrie Brownstein was appointed as Director at Shattuck Labs, Inc..
  - Action: appointed
  - Role: Director
  source text: On October 22, 2021, the Board appointed Dr. Carrie Brownstein as a member of the Board, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1680367/000119312521311373/0001193125-21-311373-index.htm
- Executive change
  George Golumbeski was appointed as Chairman of the Board at Shattuck Labs, Inc..
  - Action: appointed
  - Role: Chairman of the Board
  source text: The Board appointed independent director George Golumbeski to replace Mr. Hornblower as Chairman of the Board.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1680367/000119312521311373/0001193125-21-311373-index.htm

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