Richard Aranda - Jun 21, 2021 Form 4 Insider Report for Gossamer Bio, Inc. (GOSS)

Role: Chief Medical Officer
Signature: /s/ Jeff Boerneke, Attorney-in-Fact
Stock symbol: GOSS
Transactions as of: Jun 21, 2021
Transactions value $: $0
Form type: 4
Date filed: 6/22/2021, 08:13 PM
Next filing: Oct 26, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GOSS	Common Stock	Award	$0	+15K	+7.32%	$0.00	220K	Jun 21, 2021	Direct	F1

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	GOSS	Stock Option (Right to Buy)	Award	$0	+30K		$0.00	30K	Jun 21, 2021	Common Stock	30K	$8.47	Direct	F2

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

Explanation of Responses:

Id	Content
F1	Represents a restricted stock unit award, which will vest in three equal annual installments in accordance with the terms of the award and subject to the Reporting Person's continuous service to the Issuer on each vesting date.
F2	25% of the total number of shares subject to the option will vest on June 21, 2022 and 1/48th of the total number of shares subject to the option vest on the last day of each one-month period thereafter, subject to the Reporting Person's continuous service to the Issuer on each such vesting date.