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REPORTED · WARN NOTICE✓ VERIFIEDAdded Jul 27, 2026

Atara Biotherapeutics Layoff — May 2025

SOURCEOFFICIAL FILINGCalifornia Employment Development Department· filed March 18, 2025View the filing ↗

EMPLOYEES AFFECTED
31
SHARE OF WORKFORCE
~12%
EFFECTIVE DATE
May 2, 2025
31 OF 250 EMPLOYEES

What we know

Location: Newbury Park, CA (Ventura County).

A WARN notice for this layoff is recorded on March 18, 2025.

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

Summary

Atara Biotherapeutics disclosed this layoff in an official WARN (Worker Adjustment and Retraining Notification) notice recorded by the CA state workforce agency on March 18, 2025. The notice covers 31 employees in Newbury Park, CA (Ventura County), with the layoff effective May 2, 2025.

That is roughly 12.4% of the 250 people Atara Biotherapeutics employs.

LayoffTalk has tracked 4 layoff events at Atara Biotherapeutics since October 2022, including 98 jobs documented in official WARN filings.

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SOURCE
Official WARN notice
View state filing ↗
A
Atara BiotherapeuticsATRA
Health Care · 250 employees
4
EVENTS TRACKED
98
JOBS IN WARN FILINGS
View company profile

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CREATED JUL 27, 2026LAST UPDATED AUG 3, 2026