Yanina Grant-Huerta - 17 Nov 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
Issuer symbol
ATRA
Transactions as of
17 Nov 2025
Net transactions value
-$23,788
Form type
4
Filing time
19 Nov 2025, 16:55:00 UTC
Previous filing
20 Aug 2025
Next filing
04 Mar 2026
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 19 Nov 2025 0002064348

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ATRA Common Stock Sale $21,691 -1,645 -4.7% $13.19 33,613 17 Nov 2025 Direct F1, F2
transaction ATRA Common Stock Sale $1,121 -85 -0.25% $13.19 33,528 17 Nov 2025 Direct F1, F2
transaction ATRA Common Stock Sale $976 -74 -0.22% $13.19 33,454 17 Nov 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.