Gossamer Bio, Inc. — Director's Dealing 2019

Sep 19, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Gossamer Bio, Inc. (GOSS)
CIK: 0001728117
Period of Report: 2019-09-16

Reporting Person: Omega Fund V, L.P. (10% Owner)
Reporting Person: Omega Fund V GP, L.P. (10% Owner)
Reporting Person: Omega Fund V GP Manager, Ltd. (10% Owner)
Reporting Person: Stampacchia Otello (10% Owner, Former director.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-09-16	Common Stock	S	13213	$21.519	Disposed	6806023	Direct
2019-09-17	Common Stock	S	23400	$21.615	Disposed	6782623	Direct
2019-09-18	Common Stock	S	45600	$21.878	Disposed	6737023	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 $21.50 to $21.56 per share, inclusive.

F2: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.50 to $22.24 per share, inclusive.

F3: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.50 to $22.35 per share, inclusive.

F4: The reported securities are held directly by Omega Fund V, L.P. ("Omega V"). The reported securities may be deemed to be beneficially owned by each of Omega Fund V GP, L.P. ("Omega V GP"), as the general partner of Omega V, and Omega Fund V GP Manager, Ltd. ("Omega V GP Manager"), as the general partner of Omega V GP. Otello Stampacchia, Richard Lim, Anne-Mari Paster and Claudio Nessi (the "Omega Directors") are all the shareholders and directors of Omega V GP Manager and have shared voting and investment power over the shares held by Omega V. Each of Omega V GP, Omega Fund V GP Manager and the Omega Directors disclaims beneficial ownership of the securities reported herein, except to the extent of its or their pecuniary interest therein, if any. Effective as of September 12, 2019, Otello Stampacchia is no longer a member of the issuer's board of directors.