AnhCo Nguyen - Jan 8, 2024 Form 4 Insider Report for Atara Biotherapeutics, Inc. (ATRA)

Role: EVP, Chief Sci. & Tech Officer
Signature: /s/ Jeff Kiekhofer, Attorney-in-Fact for AnhCo Nguyen
Stock symbol: ATRA
Transactions as of: Jan 8, 2024
Transactions value $: $0
Form type: 4
Date filed: 1/9/2024, 04:40 PM
Previous filing: Nov 20, 2023
Next filing: Mar 6, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ATRA	Common Stock	Award	$0	+675K	+243.56%	$0.00	952K	Jan 8, 2024	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	These restricted stock units vest as to 1/8th of the total number of shares (rounded down to the next whole number of shares) on the second Quarterly Vesting Date (as defined below) following January 8, 2024, and as to 1/8th of the total number of shares (rounded down to the next whole number of shares) on the next seven Quarterly Vesting Dates, such that all of the shares shall be vested on the last Quarterly Vesting Date, subject to the reporting person's continuous service. "Quarterly Vesting Date" means March 1, May 15, August 15, and November 15 of each year, provided that if such date falls on a weekend or holiday, the Quarterly Vesting Date shall be the first business day after such date.

Content

These restricted stock units vest as to 1/8th of the total number of shares (rounded down to the next whole number of shares) on the second Quarterly Vesting Date (as defined below) following January 8, 2024, and as to 1/8th of the total number of shares (rounded down to the next whole number of shares) on the next seven Quarterly Vesting Dates, such that all of the shares shall be vested on the last Quarterly Vesting Date, subject to the reporting person's continuous service. "Quarterly Vesting Date" means March 1, May 15, August 15, and November 15 of each year, provided that if such date falls on a weekend or holiday, the Quarterly Vesting Date shall be the first business day after such date.