Gossamer Bio, Inc. — Director's Dealing 2019

Feb 8, 2019

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Gossamer Bio, Inc. (GOSS)
CIK: 0001728117
Period of Report: 2019-02-07

Reporting Person: Daniel Thomas O (Director)

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Series A Preferred Stock	$0.00		Common Stock (38095)		Indirect
Stock Option (Right to Buy)	$2.61	2028-05-21	Common Stock (131111)		Direct

Footnotes

F1: The 171,429 shares of Series A Preferred Stock held by a trust for the benefit of the Reporting Person are convertible, at any time, at the holder's election, at a ratio of 4.5 to one share of the Issuer's common stock. In addition, effective immediately prior to the closing of the Issuer's initial public offering of its common stock, each share of Series A Preferred Stock will automatically convert at a ratio of 4.5 to one share of the Issuer's common stock. The Series A Preferred Stock has no expiration date.

F2: 1/36th of the total number of shares subject to the option vested on February 14, 2018 and 1/36th 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 Corporation on each such vesting date