Official filing · original source linked

Atara Biotherapeutics WARN notice — CA, 2025-03-18

Name: Atara Biotherapeutics WARN notice
Creator: California Employment Development Department

Atara Biotherapeutics reported 31 workers affected in Ventura. Notice date: Mar 18, 2025; planned effective date: May 2, 2025.

Raw employer name: Atara Biotherapeutics
Canonical company: Atara Biotherapeutics →
Workers affected: 31
Event type: layoff
Filing status: filed
Notice / received date: Mar 18, 2025
Effective date: May 2, 2025
City: Unavailable
County: Ventura →
State: California →
ZIP: 91320
Reported location: Ventura
Published address: 1280 Rancho Conejo Blvd. Newbury Park CA 91320
Source classification: Layoff Permanent
Source agency: California Employment Development Department

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Original source & provenance

Open supplied source ↗

Agency source
California Employment Development Department

Source ID / record ID
ca-edd / atara-biotherapeutics|1280-rancho-conejo-blvd-newbury-park-ca-91320|2025-03-18

First ingested
Oct 6, 2026 · 16:18 UTC

Last observed
Oct 11, 2026 · 12:17 UTC

Snapshot SHA-256
4bfe3ff5201d3f2d0a6cfb8dea6ae22f818f2f14a162c6914076c13e5cb1ca57

View original source row

{
  "cells": {
    "notice_date": "03/18/2025",
    "received_date": "03/18/2025",
    "effective_date": "05/02/2025",
    "company": "Atara Biotherapeutics",
    "reported_location": "Ventura County",
    "workers": "31",
    "type": "Layoff Permanent",
    "address": "1280 Rancho Conejo Blvd. Newbury Park CA 91320"
  },
  "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": 38
}

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.

Related company filings

Company / location	Workers	Effective date	Notice date	Type / source
Atara BiotherapeuticsVentura, CA	1	Mar 8, 2024	Jan 8, 2024	layoffSource ↗
Atara BiotherapeuticsVentura, CA	43	Mar 8, 2024	Jan 8, 2024	layoffSource ↗
Atara BiotherapeuticsVentura, CA	72	Dec 31, 2023	Nov 1, 2023	layoffSource ↗
Atara BiotherapeuticsVentura, CA	1	Dec 31, 2023	Nov 1, 2023	layoffSource ↗
Atara BiotherapeuticsSan Mateo, CA	14	Oct 7, 2022	Aug 8, 2022	layoffSource ↗

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.

Atara Biotherapeutics WARN notice — CA, 2025-03-18

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