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Atara Biotherapeutics (ATRA) SEC Filings & 10K Form

Atara Biotherapeutics logo
$12.97 +0.67 (+5.45%)
Closing price 09/23/2025 04:00 PM Eastern
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$12.96 -0.01 (-0.08%)
As of 09/23/2025 06:16 PM Eastern
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Recent Atara Biotherapeutics SEC Filings

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DateFilerForm TypeView
08/20/2025
3:11 PM		Atara Biotherapeutics (Issuer)
Nguyen AnhCo (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
08/20/2025
3:08 PM		Atara Biotherapeutics (Issuer)
Grant-Huerta Yanina (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
08/19/2025
7:15 PM		Atara Biotherapeutics (Subject)
Panacea Innovation Ltd (Filed by)
Form SCHEDULE 13D/A
08/19/2025
7:15 PM		Atara Biotherapeutics (Issuer)
Huang James (Reporting)
Panacea Innovation Ltd (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
07/21/2025
8:00 AM		Atara Biotherapeutics (Issuer)
Huang James (Reporting)
Panacea Innovation Ltd (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
07/14/2025
3:03 PM		Atara Biotherapeutics (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
06/12/2025
7:38 PM		Atara Biotherapeutics (Issuer)
MALLIK AMEET (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/12/2025
7:39 PM		Atara Biotherapeutics (Issuer)
Roncarolo Maria Grazia (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/12/2025
7:39 PM		Atara Biotherapeutics (Issuer)
Touchon Pascal (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/12/2025
7:39 PM		Atara Biotherapeutics (Issuer)
Fust Matthew K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/12/2025
7:39 PM		Atara Biotherapeutics (Issuer)
Gallagher Carol Giltner (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/12/2025
7:36 PM		Atara Biotherapeutics (Issuer)
HEIDEN WILLIAM K (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
06/11/2025
3:15 PM		Atara Biotherapeutics (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/23/2025
3:05 PM		Atara Biotherapeutics (Subject)
Redmile Group, LLC (Filed by)
Form SCHEDULE 13D
05/21/2025
5:00 PM		Atara Biotherapeutics (Subject)
Panacea Innovation Ltd (Filed by)
Form SCHEDULE 13D
05/21/2025
5:00 PM		Atara Biotherapeutics (Issuer)
Huang James (Reporting)
Panacea Innovation Ltd (Reporting)
Form 3
Initial statement of beneficial ownership of securities  
05/16/2025
6:27 PM		Atara Biotherapeutics (Subject)
Grant-Huerta Yanina (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
05/16/2025
6:32 PM		Atara Biotherapeutics (Subject)
Nguyen AnhCo (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
05/16/2025
5:26 PM		Adiumentum Capital Fund I GP LLC (Reporting)
Adiumentum Capital Fund I LP (Reporting)
Atara Biotherapeutics (Issuer)
Ciongoli Gregory Austin (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
05/16/2025
5:28 PM		Adiumentum Capital Fund I LP (Filed by)
Atara Biotherapeutics (Subject)
Form SCHEDULE 13D/A
05/16/2025
4:26 PM		Atara Biotherapeutics (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/15/2025
8:00 PM		Atara Biotherapeutics (Subject)
Redmile Group, LLC (Filed by)
Form SCHEDULE 13G/A
05/15/2025
7:41 AM		Atara Biotherapeutics (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
05/15/2025
7:45 AM		Atara Biotherapeutics (Filer)
Form 10-Q
General form for quarterly reports under Section 13 or 15(d)  
04/28/2025
3:15 PM		Atara Biotherapeutics (Filer)
Form DEF 14A
04/10/2025
6:14 PM		Atara Biotherapeutics (Issuer)
Grant-Huerta Yanina (Reporting)
Form 3
Initial statement of beneficial ownership of securities  
04/02/2025
6:54 PM		Atara Biotherapeutics (Issuer)
Hyllengren Eric J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/05/2025
4:16 PM		Atara Biotherapeutics (Issuer)
Henrich Jill (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/05/2025
4:17 PM		Atara Biotherapeutics (Issuer)
Hyllengren Eric J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/05/2025
4:17 PM		Atara Biotherapeutics (Issuer)
Nguyen AnhCo (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
03/03/2025
5:29 PM		Atara Biotherapeutics (Subject)
Hyllengren Eric J (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
03/03/2025
5:30 PM		Atara Biotherapeutics (Subject)
Nguyen AnhCo (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
03/03/2025
5:27 PM		Atara Biotherapeutics (Subject)
Henrich Jill (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
02/06/2025
5:34 PM		Atara Biotherapeutics (Subject)
Panacea Innovation Ltd (Filed by)
Form SCHEDULE 13G
01/29/2025
3:52 PM		Atara Biotherapeutics (Issuer)
Hyllengren Eric J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
01/27/2025
3:30 PM		Atara Biotherapeutics (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
01/21/2025
6:36 AM		Atara Biotherapeutics (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
01/16/2025
3:05 PM		Atara Biotherapeutics (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
12/23/2024
3:00 PM		Atara Biotherapeutics (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
11/20/2024
5:04 PM		Atara Biotherapeutics (Issuer)
Nguyen AnhCo (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
11/20/2024
5:04 PM		Atara Biotherapeutics (Issuer)
Hyllengren Eric J (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
11/20/2024
5:05 PM		Atara Biotherapeutics (Issuer)
Henrich Jill (Reporting)
Form 4
Statement of changes in beneficial ownership of securities  
11/18/2024
4:54 PM		Atara Biotherapeutics (Subject)
Henrich Jill (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
11/18/2024
4:55 PM		Atara Biotherapeutics (Subject)
Hyllengren Eric J (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
11/18/2024
4:56 PM		Atara Biotherapeutics (Subject)
Murugan Amar (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
11/18/2024
4:58 PM		Atara Biotherapeutics (Subject)
Nguyen AnhCo (Reporting)
Form 144
Notice of proposed sale of securities pursuant to Rule 144  
11/14/2024
5:10 PM		Atara Biotherapeutics (Subject)
EcoR1 Capital, LLC (Filed by)
Form SC 13G/A
11/12/2024
12:29 PM		Atara Biotherapeutics (Subject)
VANGUARD GROUP INC (Filed by)
Form SC 13G/A
11/04/2024
10:24 AM		Atara Biotherapeutics (Subject)
VANGUARD GROUP INC (Filed by)
Form SC 13G/A
10/15/2024
3:05 PM		Atara Biotherapeutics (Filer)
Form 8-K
Current report pursuant to Section 13 or 15(d)  
(Data available from 1/1/2016 forward)


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This page (NASDAQ:ATRA) was last updated on 9/24/2025 by MarketBeat.com Staff
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