---
schema_version: "secwatch.filing_event.v1"
accession: "0001559053-26-000024"
form_type: "8-K"
ticker: "PRTA"
cik: "0001559053"
company_name: "PROTHENA CORP PUBLIC LTD CO"
filed_at: "2026-10-02T20:17:50+00:00"
generated_at: "2026-10-12T14:37:30.619076+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Prothena Chief Development Officer Chad Swanson resigns Oct 9 to join a strategic partner

## Summary
- Chad J. Swanson, Ph.D., Chief Development Officer, notified Prothena on October 2, 2026 that he is resigning effective October 9, 2026.
- Swanson is leaving to accept a position with one of the Company's strategic partners, according to the filing.
- In the new role he will assume a leadership role over a program partnered with Prothena.
- No successor or interim Chief Development Officer was named in the filing.

## SEC filing metadata
- accession: 0001559053-26-000024
- form_type: 8-K
- ticker: PRTA
- cik: 0001559053
- company_name: PROTHENA CORP PUBLIC LTD CO
- filed_at: 2026-10-02T20:17:50+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1559053/000155905326000024/0001559053-26-000024-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1559053/000155905326000024/prta-20261002.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001559053-26-000024
- JSON: https://secwatch.observer/filing/0001559053-26-000024.json
- Plain text: https://secwatch.observer/filing/0001559053-26-000024.txt

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