WARN MASS-LAYOFF NOTICE
Sutro Biopharma, Inc.
Workers on notice
1
reported by the employer in this notice; not a verified outcome
Effective date
2025-09-30
the date separations take effect, as filed
Notice date
2025-09-29
when the employer filed with the state agency
Notice type
Layoff Permanent
layoff, closure, or temporary, as the state recorded it
Reported locality: Remote Remote
Jurisdiction: CA
Source import recorded Oct 21, 2026
Notice type is shown as received. A code definition is not verified here; inspect the state source.
California layoffs and WARN noticesFederal WARN requires 60 days' advance notice; statutory exceptions can shorten or excuse notice. This site publishes notices as filed and does not judge compliance.
Source: State Departments of Labor · per-state WARN notice filings · Source import recorded Oct 21, 2026
Several states do not publish WARN notices in a form we ingest; the current missing-state list is maintained on the data-sources page.
The latest source check did not verify newer data. Its outcome describes the source check, not this notice or its layoffs. The latest warn_ca source check ends on 2026-11-08 with outcome HARD. It does not advance the verified refresh date.
FILING PARTY
Employer
REPORTED LOCATION
Location
-- means unavailable in this record. 0 is a recorded zero.
ORIGINAL RECORD
Source filing
Original sources
- CA WARN publisher. WARN source: Publisher spreadsheet link (exact record match unverified)Notice: 5ca5f8309f01
Source details
Notice: 5ca5f8309f01
Ingested: 2026-07-12 03:24:37.975779+00
Source state
CA
Ingested
2026-07-12
Worker Adjustment and Retraining Notification: a state labor agency disclosure. Coverage varies by state.
RELATED EVIDENCE · REVIEW SIGNAL
WARN × H-1B filing overlap
The same employer filed 1 H-1B labor condition applications in a window around this notice. The pair is recorded as a displacement event with an evidence score of 80/100. The matched filings are listed there.
Timing overlap is a review signal. It does not show that a noticed worker was replaced, or that any laid-off worker held a visa.
EMPLOYER RECORD
Other notices linked to this employer record 2 other notices
| Location | Date | Workers |
|---|---|---|
| City: South San Francisco State: CA | Effective date | 45 |
| City: San Carlos State: CA | Effective date | 8 |
-- means unavailable in this record. 0 is a recorded zero.
Browse WARN notices · search by the employer name as filed; name variants may add or omit results · employer dossier
Questions about the data & methods
About this WARN notice
What is a WARN notice?
A WARN notice is a mass-layoff or plant-closure notice an employer files with a state agency under the Worker Adjustment and Retraining Notification Act. It tells workers and the state about a large layoff or closure in advance.
Why do some notices show a future effective date?
Employers file projected layoff dates, sometimes years ahead, and the archive records them as filed. A future date is a filed plan, not a completed layoff; on this page it carries a projected marker.
What does a WARN notice tell you about an H-1B employer?
A WARN notice records a planned layoff; WARN data carries no nationality, so the notice does not say who was laid off. When the same employer filed H-1B labor applications in a window around the notice, XH1B records the pair as a displacement event and scores the match. Timing overlap is a review signal, not evidence that a noticed worker was replaced.
Is every layoff covered by WARN?
No. WARN only covers employers of a certain size and layoffs above a threshold, and the rules vary by state. A missing WARN notice does not mean no layoff happened.
Does a late or missing notice mean an employer broke the law?
Not on this site. Federal WARN requires 60 days' advance notice; statutory exceptions can shorten or excuse notice. This site publishes notices as filed and does not judge compliance.
Public source records and site analysis. We do not attest to accuracy. Read the full disclaimer.
Dataset guides and site methods
- [1] XH1B method or registry · XH1B. WARN Notices (mass layoffs): source registry. Source registry entry: warnXH1B dataset description: One row per source_notice_id. The definition of a mass layoff and the layoff threshold vary by state. The threshold is typically 50 or more employees.
- [2] Dataset documentation · DOL OFLC. LCA public disclosure record layout (FY2026 Q3). Pages 1–4: application, DOL outcome and dates, requested positions, employer, representatives, worksites and pay unitsThis layout covers determinations issued October 1, 2025 through June 30, 2026. It documents employer-provided application fields and DOL decisions, not USCIS decisions, payroll verification, legal bills or worker-linked moves. Older layouts can differ.Checked 2026-10-17.
- [3] XH1B method or registry · XH1B. Displacement Model and Assumptions. Eligibility, requested-position weighting, scopes, WARN matching, and counting limitsModel outputs are estimates. A matched layoff notice does not prove that an H-1B worker replaced a laid-off worker.