---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-24-011737"
form_type: "8-K"
ticker: "ORKA"
cik: "0000907654"
company_name: "Oruka Therapeutics, Inc."
filed_at: "2024-02-06T23:59:59+00:00"
generated_at: "2026-06-06T08:51:28.846894+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Two ARCA biopharma directors resign; board reduced from eight to six

## Summary
- Raymond L. Woosley and Dan Mitchell resigned from ARCA biopharma board effective Feb 2, 2024.
- Resignations not due to any disagreement with company's operations, policies, or practices.
- Board size reduced from eight to six directors; no new directors appointed.

## SEC filing metadata
- accession: 0000950170-24-011737
- form_type: 8-K
- ticker: ORKA
- cik: 0000907654
- company_name: Oruka Therapeutics, Inc.
- filed_at: 2024-02-06T23:59:59+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/907654/000095017024011737/0000950170-24-011737-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/907654/000095017024011737/abio-20240202.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-24-011737
- JSON: https://secwatch.observer/filing/0000950170-24-011737.json
- Plain text: https://secwatch.observer/filing/0000950170-24-011737.txt

## Key facts
- Executive change
  Raymond L. Woosley resigned as director at Oruka Therapeutics, Inc..
  - Action: resigned
  - Role: director
  source text: On February 2, 2024, Raymond L. Woosley, M.D., Ph.D. and Dan Mitchell each resigned from the board of directors (the “ Board ”) of ARCA biopharma, Inc., a Delaware corporation (“ ARCA ”), effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/907654/000095017024011737/0000950170-24-011737-index.htm
- Executive change
  Dan Mitchell resigned as director at Oruka Therapeutics, Inc..
  - Action: resigned
  - Role: director
  source text: On February 2, 2024, Raymond L. Woosley, M.D., Ph.D. and Dan Mitchell each resigned from the board of directors (the “ Board ”) of ARCA biopharma, Inc., a Delaware corporation (“ ARCA ”), effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/907654/000095017024011737/0000950170-24-011737-index.htm

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