Gossamer Bio, Inc. — Director's Dealing 2019

Aug 30, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Gossamer Bio, Inc. (GOSS)
CIK: 0001728117
Period of Report: 2019-08-28

Reporting Person: Salter-Cid Luisa (Chief Scientific Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-08-28	Common Stock	S	23748	$19.6532	Disposed	150308	Direct
2019-08-29	Common Stock	S	26252	$20.0868	Disposed	124056	Direct

Footnotes

F1: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.50 to $19.96 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F2: Includes 97,908 shares subject to forfeiture, which shares will vest in equal monthly installments as set forth in the restricted stock agreement between the Issuer and Reporting Person so that all of the shares will be released from the forfeiture restriction on November 20, 2021, subject to the Reporting Person's continuous service to the Corporation on each such vesting date. The shares are also subject to certain accelerated vesting provisions as set forth in more detail in the employment agreement between the Issuer and the Reporting Person.

F3: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.71 to $20.42 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.