Atara Biotherapeutics, Inc. reports

Company Names, identifiers, and filing context for this profile. 1 identity field
Company location
Thousand Oaks, CA
SEC filing record 1 source field available
Fiscal year end
31 December
Atara Biotherapeutics, Inc. has filed 1,129 SEC EDGAR filings since 10 Apr 2014

SEC filing history

Showing 1-25 of 1,000 matching filings.

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25
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1
144 File 001-36548

144 filing

Filing date
26 Aug 2026
Reporting date
Not listed
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4

FORM 4

Filing date
26 Aug 2026
Reporting date
17 Aug 2026
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SCHEDULE 13G/A File 005-88393

SCHEDULE 13G/A filing

Filing date
14 Aug 2026
Reporting date
Not listed
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4

OWNERSHIP DOCUMENT

Filing date
24 Jul 2026
Reporting date
22 Jul 2026
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SCHEDULE 13D/A File 005-88393

SCHEDULE 13D/A filing

Filing date
24 Jul 2026
Reporting date
Not listed
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3

FORM 3

Filing date
06 Jul 2026
Reporting date
26 Jun 2026
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4

FORM 4

Filing date
15 Jun 2026
Reporting date
11 Jun 2026
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3

FORM 3

Filing date
15 Jun 2026
Reporting date
11 Jun 2026
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S-8 File 333-296747

REGISTRATION STATEMENT

Filing date
12 Jun 2026
Reporting date
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8-K File 001-36548

CURRENT REPORT

Filing date
12 Jun 2026
Reporting date
09 Jun 2026
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4

FORM 4

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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4

FORM 4

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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4

FORM 4

Filing date
11 Jun 2026
Reporting date
09 Jun 2026
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4

4 filing

Filing date
20 May 2026
Reporting date
18 May 2026
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4

4 filing

Filing date
20 May 2026
Reporting date
18 May 2026
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144 File 001-36548

144 filing

Filing date
18 May 2026
Reporting date
Not listed
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144 File 001-36548

144 filing

Filing date
18 May 2026
Reporting date
Not listed
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SCHEDULE 13D/A File 005-88393

SCHEDULE 13D/A filing

Filing date
14 May 2026
Reporting date
Not listed
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SCHEDULE 13G File 005-88393

SCHEDULE 13G filing

Filing date
13 May 2026
Reporting date
Not listed
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424B5 File 333-275256

424B5

Filing date
12 May 2026
Reporting date
Not listed
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