---
schema_version: "secwatch.filing_event.v1"
accession: "0001559053-23-000007"
form_type: "8-K"
ticker: "PRTA"
cik: "0001559053"
company_name: "PROTHENA CORP PUBLIC LTD CO"
filed_at: "2023-03-10T23:59:59+00:00"
generated_at: "2026-06-18T05:27:51.981999+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Prothena confirms no cash or securities at Silicon Valley Bank

## Summary
- Company states it does not hold any cash deposits or securities at Silicon Valley Bank.
- Disclosure made on March 10, 2023, amid SVB's collapse and industry exposure concerns.
- No financial exposure to SVB's receivership; investor risk from bank failure avoided.

## SEC filing metadata
- accession: 0001559053-23-000007
- form_type: 8-K
- ticker: PRTA
- cik: 0001559053
- company_name: PROTHENA CORP PUBLIC LTD CO
- filed_at: 2023-03-10T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1559053/000155905323000007/0001559053-23-000007-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1559053/000155905323000007/prta-20230310.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001559053-23-000007
- JSON: https://secwatch.observer/filing/0001559053-23-000007.json
- Plain text: https://secwatch.observer/filing/0001559053-23-000007.txt

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