SEC Form 4 · accession 0001209191-19-009458

Gossamer Bio, Inc. · GOSS

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Kristina Burow

Director

Period of report

Feb 12, 2019

Accepted (ET)

Feb 12, 2019 · 5:44 pm EST

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001728117

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2,F3	Feb 12, 2019	C	3,682,539	—	A	3,682,539	I	See footnotes
Common Stock^F1,F2,F3	Feb 12, 2019	C	345,419	—	A	4,027,958	I	See footnotes
Common Stock^F1,F3,F4	Feb 12, 2019	C	3,682,539	—	A	3,682,539	I	See footnotes
Common Stock^F1,F3,F4	Feb 12, 2019	C	345,419	—	A	4,027,958	I	See footnotes

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	D/I
Series A Preferred Stock^F1,F2,F3	—	Feb 12, 2019	C	16,571,429	D	—	—	Common Stock	3,682,539	I
Series A Preferred Stock^F1,F3,F4	—	Feb 12, 2019	C	16,571,428	D	—	—	Common Stock	3,682,539	I
Series B Preferred Stock^F1,F2,F3	—	Feb 12, 2019	C	1,554,388	D	—	—	Common Stock	345,419	I
Series B Preferred Stock^F1,F3,F4	—	Feb 12, 2019	C	1,554,388	D	—	—	Common Stock	345,419	I

Explanation of responses

F1The shares of the Issuer's Series A Preferred Stock and Series B Preferred Stock automatically converted into shares of the Issuer's Common Stock, for no additional consideration, at a ratio of 4.5 to one share, immediately prior to the consummation of the Issuer's initial public offering. The Series A Preferred Stock and Series B Preferred Stock had no expiration date.
F2These shares are directly held by ARCH Venture Fund IX, L.P. ("ARCH IX"). ARCH Venture Partners IX, L.P. ("GPLP"), as the sole general partner of ARCH IX, may be deemed to beneficially own the shares held by ARCH IX. ARCH Venture Partners IX, LLC ("GPLLC"), as the sole general partner of GPLP, may be deemed to beneficially own the shares held by GPLP. The Reporting Person has an interest in the GPLP and the GPLLC but does not have voting or investment control over the shares held by ARCH IX.
F3The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of her pecuniary interest therein.
F4These shares are directly held by ARCH Venture Fund IX Overage, L.P. ("ARCH Overage"). ARCH Venture Partners IX Overage, L.P. ("Overage GPLP"), as the sole general partner of ARCH Overage, may be deemed to beneficially own the shares held by ARCH Overage. GPLLC, as the sole general partner of Overage GPLP, may be deemed to beneficially own the shares held by Overage GPLP. The Reporting Person has an interest in the Overage GPLP and the GPLLC but does not have voting or investment control over the shares held by ARCH Overage.