SEC Form 4/A · accession 0000899243-18-006475

Calithera Biosciences, Inc. · CALA

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

This is an amendment (Form 4/A). It replaces an earlier filing for the same period.

Reporting owner

Officer — VP, RESEARCH

Period of report

Feb 20, 2018

Accepted (ET)

Mar 6, 2018 · 4:11 pm EST

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001496671

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2	Feb 20, 2018	M	1,979	$0.96	A	25,339	D
Common Stock^F1,F2	Feb 20, 2018	M	3,116	$0.96	A	28,455	D

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Employee Stock Option (Right to Buy)^F3	$0.96	Feb 20, 2018	M	1,979	D	—	May 22, 2023	Common Stock	1,979	0	D
Employee Stock Option (Right to Buy)^F4	$0.96	Feb 20, 2018	M	3,116	D	—	May 22, 2023	Common Stock	3,116	0	D

F17,967 shares were omitted from the Reporting Person's original Form 4, and also were omitted from the Reporting Person's Form 3 filed by the Reporting Person prior to the date the original Form 4 was filed.
F2Includes 973 and 2,038 shares acquired under the Company's 2014 Employee Stock Purchase Plan on June 9, 2017 and December 8, 2017, respectively.
F31/48th of the Option vests in equal monthly installments beginning November 15, 2012. The Option shall be subject to accelerated vesting as set fourth in the optionee's employment agreement with the Company.
F41/48th of the Option vests in equal monthly installments one month after May 23, 2013. The Option shall be subject to accelerated vesting as set fourth in the optionee's employment agreement with the Company.