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[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 <![CDATA[S-3 - Registration statement under Securities Act of 1933]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-110849/0001193125-26-110849.pdf Tue, 17 Mar 26 16:17:51 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-110849/0001193125-26-110849.pdf <![CDATA[424B5 - Prospectus [Rule 424(b)(5)]]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-108386/0001193125-26-108386.pdf Mon, 16 Mar 26 16:20:43 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-108386/0001193125-26-108386.pdf <![CDATA[10-K - Annual report [Section 13 and 15(d), not S-K Item 405]]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-108361/0001193125-26-108361.pdf Mon, 16 Mar 26 16:16:19 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-108361/0001193125-26-108361.pdf <![CDATA[8-K - Current report]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-108344/0001193125-26-108344.pdf Mon, 16 Mar 26 16:11:22 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-108344/0001193125-26-108344.pdf <![CDATA[8-K - Current report]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-103127/0001193125-26-103127.pdf Thu, 12 Mar 26 08:11:59 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0001193125-26-103127/0001193125-26-103127.pdf <![CDATA[4 - Statement of changes in beneficial ownership of securities]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0000905148-26-001225/0000905148-26-001225.pdf Wed, 11 Mar 26 17:46:55 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0000905148-26-001225/0000905148-26-001225.pdf <![CDATA[4 - Statement of changes in beneficial ownership of securities]]> https://investors.atarabio.com/sec-filings/all-sec-filings/content/0000905148-26-001224/0000905148-26-001224.pdf Wed, 11 Mar 26 17:46:32 -0400 https://investors.atarabio.com/sec-filings/all-sec-filings/content/0000905148-26-001224/0000905148-26-001224.pdf