Yanina Grant-Huerta - Nov 17, 2025 Form 4 Insider Report for Atara Biotherapeutics, Inc. (ATRA)

Role
Chief Accounting Officer
Signature
/s/ John Chao, Attorney-in-Fact for Yanina Grant-Huerta
Stock symbol
ATRA
Transactions as of
Nov 17, 2025
Transactions value $
-$23,788
Form type
4
Date filed
11/19/2025, 04:55 PM
Previous filing
Aug 20, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Grant-Huerta Yanina Chief Accounting Officer C/O ATARA BIOTHERAPEUTICS, INC., 1280 RANCHO CONEJO BOULEVARD, THOUSAND OAKS /s/ John Chao, Attorney-in-Fact for Yanina Grant-Huerta 2025-11-19 0002064348

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ATRA Common Stock Sale -$21.7K -1.65K -4.67% $13.19 33.6K Nov 17, 2025 Direct F1, F2
transaction ATRA Common Stock Sale -$1.12K -85 -0.25% $13.19 33.5K Nov 17, 2025 Direct F1, F2
transaction ATRA Common Stock Sale -$976 -74 -0.22% $13.19 33.5K Nov 17, 2025 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Shares sold automatically to satisfy tax withholding obligations in connection with the vesting of previously granted restricted stock units, pursuant to a sale-to-cover provision in the award agreement.
F2 The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on November 17, 2025 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees.