0001209191-21-009055.txt : 20210209 0001209191-21-009055.hdr.sgml : 20210209 20210209195955 ACCESSION NUMBER: 0001209191-21-009055 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210208 FILED AS OF DATE: 20210209 DATE AS OF CHANGE: 20210209 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Koppikar Utpal CENTRAL INDEX KEY: 0001742696 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36548 FILM NUMBER: 21608668 MAIL ADDRESS: STREET 1: C/O ATARA BIOTHERAPEUTICS, INC. STREET 2: 611 GATEWAY BLVD, SUITE 900 CITY: SOUTH SAN FRANCISCO STATE: CA ZIP: 94080 ISSUER: 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 BUSINESS ADDRESS: STREET 1: 611 GATEWAY BLVD STREET 2: SUITE 900 CITY: SOUTH SAN FRANCISCO STATE: CA ZIP: 94080 BUSINESS PHONE: 650-278-8930 MAIL ADDRESS: STREET 1: 611 GATEWAY BLVD STREET 2: SUITE 900 CITY: SOUTH SAN FRANCISCO STATE: CA ZIP: 94080 4 1 doc4.xml FORM 4 SUBMISSION X0306 4 2021-02-08 0 0001604464 Atara Biotherapeutics, Inc. ATRA 0001742696 Koppikar Utpal C/O ATARA BIOTHERAPEUTICS, INC. 611 GATEWAY BLVD., SUITE 900 SOUTH SAN FRANCISCO CA 94080 0 1 0 0 Chief Financial Officer Common Stock 2021-02-08 4 S 0 1759 20.39 D 130546 D Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of Restricted Stock Units. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person. The sale is intended to comply with the requirements of Rule 10b5-1(c)(1)(i)(B) under the Exchange Act and be interpreted to meet the requirements of Rule 10b5-1(c). The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on February 8, 2021 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees. Includes 244 shares issued pursuant to the Issuer's Employee Stock Purchase Plan on November 30, 2020. /s/ David Tucker, Attorney-in-Fact for Utpal Koppikar 2021-02-09