Map / Notices / Prothena Biosciences WARN notice — CA, 2025-06-02 Official filing · original source linked
Prothena Biosciences WARN notice — CA, 2025-06-02 Prothena Biosciences Inc reported 91 workers affected in San Mateo. Notice date: Jun 2, 2025; planned effective date: Aug 1, 2025.
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Raw employer name Prothena Biosciences Inc
Workers affected 91
Event type layoff
Filing status filed
Notice / received date Jun 2, 2025
Effective date Aug 1, 2025
City Unavailable
ZIP 94005
Reported location San Mateo
Published address 1800 Sierra Point Parkway Brisbane CA 94005
Source classification Layoff Permanent
Source agency California Employment Development Department Original source & provenance Open supplied source ↗
Agency source
Source ID / record ID
First ingested
Last observed
Snapshot SHA-256 4bfe3ff5201d3f2d0a6cfb8dea6ae22f818f2f14a162c6914076c13e5cb1ca57
View original source row {
"cells": {
"notice_date": "06/02/2025",
"received_date": "06/10/2025",
"effective_date": "08/01/2025",
"company": "Prothena Biosciences Inc",
"reported_location": "San Mateo County",
"workers": "91",
"type": "Layoff Permanent",
"address": "1800 Sierra Point Parkway Brisbane CA 94005"
},
"noticeDateField": "Notice Date",
"archive": "https://edd.ca.gov/siteassets/files/jobs_and_training/warn/warn-report-for-7-1-2024-to-06-30-2025.pdf",
"page": 52
} A source-linked public record. Secondary records are attributed to their provider and are not independently verified. For direct records, “Verified” means sourced from an official agency; it does not confirm the layoffs took place.
Dates and counts are the supplied source’s reported values. Secondary-provider locations are unstructured; they are not confirmed worksite addresses. Check the original document for phased dates, updates and exceptions.
