---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-24-001805"
form_type: "8-K"
ticker: "ARWR"
cik: "0000879407"
company_name: "ARROWHEAD PHARMACEUTICALS, INC."
filed_at: "2024-01-22T23:59:59+00:00"
generated_at: "2026-06-06T20:53:45.390516+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Arrowhead CMO Javier San Martin departing Feb 1; Bruce Given returns as Chief Medical Scientist

## Summary
- Dr. Javier San Martin, Chief Medical Officer, leaves Arrowhead effective February 1, 2024.
- Bruce Given, retired former COO and R&D head, appointed Chief Medical Scientist to ensure orderly transition.
- Company thanks San Martin for his contributions as CMO and executive team member.

## SEC filing metadata
- accession: 0001628280-24-001805
- form_type: 8-K
- ticker: ARWR
- cik: 0000879407
- company_name: ARROWHEAD PHARMACEUTICALS, INC.
- filed_at: 2024-01-22T23:59:59+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/879407/000162828024001805/0001628280-24-001805-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/879407/000162828024001805/arwr-20240116.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-24-001805
- JSON: https://secwatch.observer/filing/0001628280-24-001805.json
- Plain text: https://secwatch.observer/filing/0001628280-24-001805.txt

## Key facts
- Executive change
  Javier San Martin departed as Chief Medical Officer at ARROWHEAD PHARMACEUTICALS, INC..
  - Action: leaving
  - Role: Chief Medical Officer
  source text: Javier San Martin, M.D., the Chief Medical Officer of Arrowhead Pharmaceuticals, Inc. (the “Company”), will be leaving the Company, effective as of February 1, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/879407/000162828024001805/0001628280-24-001805-index.htm
- Executive change
  Bruce Given was appointed as Chief Medical Scientist at ARROWHEAD PHARMACEUTICALS, INC..
  - Action: appointed
  - Role: Chief Medical Scientist
  source text: Bruce Given, M.D., who previously served as the Company's Chief Operating Officer and head of Research and Development until his retirement on May 1, 2020, will assist the Company in the orderly transition of Dr. San Martin's departure in Dr. Given’s new role as Chief Medical Scientist.
  evidence_url: https://www.sec.gov/Archives/edgar/data/879407/000162828024001805/0001628280-24-001805-index.htm

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