secwatch.observer — SEC 8-K summary
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Issuer:     PROTHENA CORP PUBLIC LTD CO (PRTA)
CIK:        0001559053
Form:       8-K
Filed at:   2025-06-18T23:59:59+00:00
Accession:  0001193125-25-142725
Event type: leadership
Sentiment:  negative
Materiality: 0.78
Item codes: 2.05, 5.02
LLM model:  deepseek-v4-flash:cloud@v2

Prothena cuts 63% of workforce, expects $16-20M severance costs; two C-suite execs to leave Aug 1
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- Workforce reduction of ~63% to cut operating costs; substantially complete by Q4 2025.
- Expected severance and benefits $16-20M plus non-cash stock option acceleration.
- Chief Regulatory Officer Carol D. Karp and Chief People Officer David A. Ford to depart Aug 1, 2025.
- Follows May 23 decision to discontinue birtamimab development.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1559053/000119312525142725/0001193125-25-142725-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1559053/000119312525142725/d945146d8k.htm
  HTML page:      https://secwatch.observer/filing/0001193125-25-142725

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer