Steven J. Mento - 08 Nov 2021 Form 4 Insider Report for Histogen Inc.

Role: Interim President and CEO, Director
Signature: /s/ Susan A. Knudson as attorney-in-fact for Steven J. Mento, Ph.D.
Issuer symbol: N/A
Transactions as of: 08 Nov 2021
Net transactions value: $0
Form type: 4
Filing time: 10 Nov 2021, 15:46:10 UTC
Previous filing: 03 Sep 2021
Next filing: 05 Jan 2022
SEC: View on sec.gov

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	HSTO	Stock Option (right to buy)	Award	$0	+377,830		$0.000000	377,830	08 Nov 2021	Common Stock	377,830	$0.7290	Direct	F1
transaction	HSTO	Restricted Stock Unit	Award	$0	+228,395		$0.000000	228,395	08 Nov 2021	Common Stock	228,395		Direct	F2, F3

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

Explanation of Responses:

Id	Content
F1	Twenty-five percent (25%) of the option award shall vest on the annual anniversary of the option award so that one hundred percent (100%) of the option award shall vest by the fourth anniversary of the grant date, subject to the Reporting Person continuing to provide services to Issuer through the relevant vesting dates.
F2	Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
F3	One hundred percent of the restricted stock units will vest upon the earlier to occur of (i) one (1) year after the grant date, or (ii) the Issuer's hiring of a permanent Chief Executive Officer and President, subject to the Reporting Person's continuing to provide services to Issuer through the relevant vesting dates.