0000905148-23-001450.txt : 20231114 0000905148-23-001450.hdr.sgml : 20231114 20231114182904 ACCESSION NUMBER: 0000905148-23-001450 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20231110 FILED AS OF DATE: 20231114 DATE AS OF CHANGE: 20231114 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: HEIDEN WILLIAM K CENTRAL INDEX KEY: 0001214939 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36548 FILM NUMBER: 231408431 MAIL ADDRESS: STREET 1: C/O AMAG PHARMACEUTICALS, INC. STREET 2: 1100 WINTER STREET CITY: WALTHAM STATE: MA ZIP: 02451 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: 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 4 1 form4.xml X0508 4 2023-11-10 0001604464 Atara Biotherapeutics, Inc. ATRA 0001214939 HEIDEN WILLIAM K C/O ATARA BIOTHERAPEUTICS, INC. 2380 CONEJO SPECTRUM ST, SUITE 200 THOUSAND OAKS CA 91320 true false Common Stock 2023-11-10 4 P 0 100000 0.2533 A 209000 D Represents the weighted average purchase price. The shares were purchased in multiple transactions at prices ranging from $0.2489 to $0.265. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this Form 4. /s/ Jeff Kiekhofer, Attorney-in-Fact 2023-11-14