Ward Wolff - Jun 1, 2022 Form 4 Insider Report for Calithera Biosciences, Inc. (CALA)

Role: Director
Signature: /s/ Stephanie Wong, Attorney-in-Fact for: H. Ward Wolff
Stock symbol: CALA
Transactions as of: Jun 1, 2022
Transactions value $: $0
Form type: 4
Date filed: 6/3/2022, 04:05 PM
Previous filing: Jun 14, 2021

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CALA	Stock Option (Right to Buy)	Award	$0	+20K		$0.00	20K	Jun 1, 2022	Common Stock	20K	$0.20	Direct	F1

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

Explanation of Responses:

Id	Content
F1	1/12 of the Option vests in each monthly installment as measured from June 1, 2022, until the earlier of the Option's full vesting or the reporting person ceasing to provide continuous service to the issuer. In addition, in the event of a Change in Control or a Corporate Transaction (each as defined in the plan pursuant to which the Option was granted), any unvested portion of the Option will fully vest and become exercisable as of immediately prior to the effective time of such Change in Control or Corporate Transaction, subject to the reporting person's continuous service on the effective date of such transaction.

Content

1/12 of the Option vests in each monthly installment as measured from June 1, 2022, until the earlier of the Option's full vesting or the reporting person ceasing to provide continuous service to the issuer. In addition, in the event of a Change in Control or a Corporate Transaction (each as defined in the plan pursuant to which the Option was granted), any unvested portion of the Option will fully vest and become exercisable as of immediately prior to the effective time of such Change in Control or Corporate Transaction, subject to the reporting person's continuous service on the effective date of such transaction.