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REPORTED · WARN NOTICEPublished Dec 10, 2025

Sutro Biopharma, Inc. Layoff — September 2025

EMPLOYEES AFFECTED
1
SHARE OF WORKFORCE
~1.0%
EFFECTIVE DATE
Sep 30, 2025
1 OF 100 EMPLOYEES

What we know

Location: Remote, CA (San Mateo County).

A WARN notice was filed on September 29, 2025.

Disclosed through an official WARN filing with the CA state workforce agency.

Summary

Sutro Biopharma, Inc. disclosed this layoff in an official WARN (Worker Adjustment and Retraining Notification) notice filed with the CA state workforce agency on September 29, 2025. The notice covers 1 employees in Remote, CA (San Mateo County), with the layoff effective September 30, 2025.

That is roughly 1% of the 100 people Sutro Biopharma, Inc. employs.

LayoffTalk has tracked 7 layoff events at Sutro Biopharma, Inc. since October 2023, affecting a combined 340 employees.

Comments (1)

Anonymous by default. Be kind — people reading this may be going through it right now.

LTLayoffTalk StaffStaff22 hours ago

Sutro Biopharma, Inc. cut 1 jobs in Remote, CA on September 30, 2025. What did this look like from the inside — which teams, how much notice, what severance was offered? You can post anonymously below.

SOURCE
Official WARN notice
View state filing ↗
S
Sutro Biopharma, Inc.STRO
Health Care · 100 employees
7
EVENTS TRACKED
340
AFFECTED SINCE 2023
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CREATED DEC 10, 2025LAST UPDATED DEC 10, 2025