Gossamer Bio, Inc. — Director's Dealing 2019

Sep 13, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Gossamer Bio, Inc. (GOSS)
CIK: 0001728117
Period of Report: 2019-09-10

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 (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-09-10	Common Stock	S	32373	$21.001	Disposed	6899639	Direct
2019-09-11	Common Stock	S	80403	$21.313	Disposed	6819236	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 $21.00 to $21.08 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 $21.00 to $21.63 per share, inclusive.

F3: 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. Otello Stampacchia is also a member of the issuer's board of directors.