Atara Biotherapeutics (ATRA) SEC Filings https://investors.atarabio.com/sec-filings/all-sec-filings/rss Atara Biotherapeutics (ATRA) - All SEC Filings en-us https://d1io3yog0oux5.cloudfront.net/atarabio/files/theme/images/logo-sm.png Atara Biotherapeutics Logo Equisolve Investor Relations Suite <![CDATA[SCHEDULE 13G - Statement of Beneficial Ownership by Certain Investors]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0000919574-26-002802/0000919574-26-002802.pdf Fri, 08 May 26 16:15:46 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0000919574-26-002802/0000919574-26-002802.pdf <![CDATA[144 - Report of proposed sale of securities]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-212781/0001193125-26-212781.pdf Thu, 07 May 26 20:30:27 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-212781/0001193125-26-212781.pdf <![CDATA[SCHEDULE 13G/A - Statement of Beneficial Ownership by Certain Investors]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0000935836-26-000230/0000935836-26-000230.pdf Thu, 07 May 26 19:27:14 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0000935836-26-000230/0000935836-26-000230.pdf <![CDATA[8-K - Current report]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-210413/0001193125-26-210413.pdf Thu, 07 May 26 08:10:50 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-210413/0001193125-26-210413.pdf <![CDATA[8-K - Current report]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-201397/0001193125-26-201397.pdf Fri, 01 May 26 16:06:43 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-201397/0001193125-26-201397.pdf <![CDATA[DEF 14A - Definitive proxy statements]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-177285/0001193125-26-177285.pdf Fri, 24 Apr 26 16:16:00 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-177285/0001193125-26-177285.pdf <![CDATA[DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-177280/0001193125-26-177280.pdf Fri, 24 Apr 26 16:15:48 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-177280/0001193125-26-177280.pdf <![CDATA[EFFECT - Notice of Effectiveness]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/9999999995-26-000930/9999999995-26-000930.pdf Thu, 26 Mar 26 06:05:22 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/9999999995-26-000930/9999999995-26-000930.pdf <![CDATA[424B3 - Prospectus [Rule 424(b)(3)]]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-124322/0001193125-26-124322.pdf Wed, 25 Mar 26 17:08:14 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-124322/0001193125-26-124322.pdf <![CDATA[4 - Statement of changes in beneficial ownership of securities]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-116060/0001193125-26-116060.pdf Thu, 19 Mar 26 16:31:03 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-116060/0001193125-26-116060.pdf