Atara Biotherapeutics, Inc.

Q: Jun 30 2026

Q: Mar 31 2026

FY: Dec 31 2025

Q: Sep 30 2025

Q: Jun 30 2025

Q: Mar 31 2025

FY: Dec 31 2024

Q: Sep 30 2024

Q: Jun 30 2024

Q: Mar 31 2024

FY: Dec 31 2023

Q: Sep 30 2023

Q: Jun 30 2023

Q: Mar 31 2023

FY: Dec 31 2022

Q: Sep 30 2022

Q: Jun 30 2022

Q: Mar 31 2022

FY: Dec 31 2021

Q: Sep 30 2021

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Financial Statements and Exhibits

Other Events

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

Results of Operations and Financial Condition

Other Events

Other Events

Entry into a Material Definitive Agreement

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

Results of Operations and Financial Condition

Cost Associated with Exit or Disposal Activities

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Results of Operations and Financial Condition

Results of Operations and Financial Condition

Submission of Matters to a Vote of Security Holders

Other Events

Results of Operations and Financial Condition

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Registration statement under Securities Act of 1933

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Registration statement under Securities Act of 1933

Notice of Effectiveness

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Post-effective amendment to a registration statement

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Required Information in Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Preliminary Proxy Statement

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Preliminary Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Cherry Brian N

Nguyen AnhCo

Nguyen AnhCo

Point72 Asset Management, L.P.

Redmile Group, LLC; Green Jeremy

Redmile Group, LLC

Sarney Kevin G

Cherry Brian N

Cherry Brian N

Ciongoli Gregory Austin

Fust Matthew K

HEIDEN WILLIAM K

Nguyen AnhCo

Grant-Huerta Yanina

Grant-Huerta Yanina

Nguyen AnhCo

Redmile Group, LLC

Adage Capital Management, L.P.

EcoR1 Capital, LLC

EcoR1 Capital, LLC

Correspondence with the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Post-effective amendment to an automatic shelf registration statement

No description available

No description available

No description available

Letter from the SEC

Correspondence with the SEC

No description available

Correspondence with the SEC

Correspondence with the SEC

Letter from the SEC

No description available

No description available

Correspondence with the SEC