# EDGAR Filing Document

**Accession Number:** 0001604464
**File Stem:** 9999999995-23-000387
**Filing Date:** 2023-2
**Character Count:** 1358
**Document Hash:** da86ddef83e4b60a3dc68eaa211cdf11
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-23-000387.hdr.sgml**: 20230214

**ACCESSION NUMBER**: 9999999995-23-000387

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230213

**DATE AS OF CHANGE**: 20230214

**EFFECTIVENESS DATE**: 20230213

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Atara Biotherapeutics, Inc.
- **CENTRAL INDEX KEY:** 0001604464
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **IRS NUMBER:** 460920988
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-253731
- **FILM NUMBER:** 23621657

**BUSINESS ADDRESS:**
- **STREET 1:** 2380 CONEJO SPECTRUM ST
- **STREET 2:** SUITE 200
- **CITY:** THOUSAND OAKS
- **STATE:** CA
- **ZIP:** 91320
- **BUSINESS PHONE:** 805-623-4244

**MAIL ADDRESS:**
- **STREET 1:** 2380 CONEJO SPECTRUM ST
- **STREET 2:** SUITE 200
- **CITY:** THOUSAND OAKS
- **STATE:** CA
- **ZIP:** 91320

### UNITED STATES
### SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## Notice of Effectiveness

**Date:** February 13, 2023

**Accession Number:** 0001193125-23-028807

**Form Type:** POS AM

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**CIK:** 0001604464

**Company Name:** Atara Biotherapeutics, Inc.

**File Number:** 333-253731