Utpal Koppikar - Nov 16, 2021 Form 4 Insider Report for Atara Biotherapeutics, Inc. (ATRA)

Role: Chief Financial Officer
Signature: /s/ David Tucker, Attorney-in-Fact for Utpal Koppikar
Stock symbol: ATRA
Transactions as of: Nov 16, 2021
Transactions value $: -$62,562
Form type: 4
Date filed: 11/18/2021, 04:53 PM
Previous filing: Aug 19, 2021
Next filing: Nov 19, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ATRA	Common Stock	Sale	-$62.6K	-3.66K	-2.26%	$17.12^*	158K	Nov 16, 2021	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 pursuant to a 10b5-1 arrangement to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units.
F2	The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on November 16, 2021 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees. The prices actually received ranged from $16.45 to $17.3823. The reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold on behalf of the group at each price within the range.

Content

Shares sold pursuant to a 10b5-1 arrangement to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units.

The sale price of the reporting person's shares represents the weighted average price of all shares sold by a broker on November 16, 2021 on behalf of a group of employees of the Issuer to satisfy the payment of withholding tax liability of such employees. The prices actually received ranged from $16.45 to $17.3823. The reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold on behalf of the group at each price within the range.