---
schema_version: "secwatch.filing_event.v1"
accession: "0001559053-22-000012"
form_type: "8-K"
ticker: "PRTA"
cik: "0001559053"
company_name: "PROTHENA CORP PUBLIC LTD CO"
filed_at: "2022-03-25T23:59:59+00:00"
generated_at: "2026-06-26T17:21:19.670136+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Prothena directors/officers adopt 10b5-1 plans for 458,174 expiring options

## Summary
- Options granted in Jan/Mar/Apr 2013 expire in Jan/Mar/Apr 2023; cover 458,174 shares (<1% of outstanding) with exercise prices $6.41-$6.73 per share.
- Directors and executive officers adopted Rule 10b5-1 trading plans to exercise/sell these expiring options.
- Plans allow orderly disposition of options expiring in 2023; transactions will be reported to the SEC.

## SEC filing metadata
- accession: 0001559053-22-000012
- form_type: 8-K
- ticker: PRTA
- cik: 0001559053
- company_name: PROTHENA CORP PUBLIC LTD CO
- filed_at: 2022-03-25T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1559053/000155905322000012/0001559053-22-000012-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1559053/000155905322000012/prta-20220325.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001559053-22-000012
- JSON: https://secwatch.observer/filing/0001559053-22-000012.json
- Plain text: https://secwatch.observer/filing/0001559053-22-000012.txt

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