Faheem Hasnain - 20 Mar 2023 Form 4 Insider Report for Gossamer Bio, Inc. (GOSS)

Role: President & CEO, Director
Signature: /s/ Jeff Boerneke, Attorney-in-Fact
Issuer symbol: GOSS
Transactions as of: 20 Mar 2023
Net transactions value: +$1,000,389
Form type: 4
Filing time: 22 Mar 2023, 17:14:52 UTC
Previous filing: 24 Jan 2023
Next filing: 09 May 2023
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GOSS	Common Stock	Purchase	$174,486	+168,683	+4.7%	$1.03	3,786,008	20 Mar 2023	By family trust	F1
transaction	GOSS	Common Stock	Purchase	$322,324	+269,389	+7.1%	$1.20	4,055,397	21 Mar 2023	By family trust	F2
transaction	GOSS	Common Stock	Purchase	$503,580	+440,500	+11%	$1.14	4,495,897	22 Mar 2023	By family trust	F3
holding	GOSS	Common Stock						143,465	20 Mar 2023	Direct

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	+544,500		$0.000000	544,500	20 Mar 2023	Common Stock	544,500	$1.21	Direct	F4

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

Explanation of Responses:

Id	Content
F1	This transaction was executed in multiple trades at prices ranging from $0.97 to 1.09 per share. The price reported above reflects the weighted average sale price for the entire number of shares sold. Information on the exact number of shares sold at each sale price can be obtained from the Issuer upon request.
F2	This transaction was executed in multiple trades at prices ranging from $1.155 to $1.21 per share. The price reported above reflects the weighted average sale price for the entire number of shares sold. Information on the exact number of shares sold at each sale price can be obtained from the Issuer upon request.
F3	This transaction was executed in multiple trades at prices ranging from $1.06 to $1.20 per share. The price reported above reflects the weighted average sale price for the entire number of shares sold. Information on the exact number of shares sold at each sale price can be obtained from the Issuer upon request.
F4	25% of the total number of shares subject to the option will vest on March 20, 2024 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.