<SEC-DOCUMENT>0001564590-19-009031-index.html : 20190322
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<ACCEPTANCE-DATETIME>20190322164522
ACCESSION NUMBER:		0001564590-19-009031
CONFORMED SUBMISSION TYPE:	10-K
PUBLIC DOCUMENT COUNT:		13
CONFORMED PERIOD OF REPORT:	20181231
FILED AS OF DATE:		20190322
DATE AS OF CHANGE:		20190322

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Gossamer Bio, Inc.
		CENTRAL INDEX KEY:			0001728117
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				475461709
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		10-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38796
		FILM NUMBER:		19700401

	BUSINESS ADDRESS:	
		STREET 1:		3013 SCIENCE PARK
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
		BUSINESS PHONE:		(858) 922-0718

	MAIL ADDRESS:	
		STREET 1:		3013 SCIENCE PARK
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92121
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<TEXT>
Document 1 - file: ck0001728117-10k_20181231.htm

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<DOCUMENT>
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<FILENAME>ck0001728117-ex211_59.htm
<DESCRIPTION>EX-21.1
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Document 2 - file: ck0001728117-ex211_59.htm

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<DOCUMENT>
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<FILENAME>ck0001728117-ex231_108.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 3 - file: ck0001728117-ex231_108.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-31.1
<SEQUENCE>4
<FILENAME>ck0001728117-ex311_58.htm
<DESCRIPTION>EX-31.1
<TEXT>
Document 4 - file: ck0001728117-ex311_58.htm

</DOCUMENT>
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<SEQUENCE>5
<FILENAME>ck0001728117-ex312_57.htm
<DESCRIPTION>EX-31.2
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Document 5 - file: ck0001728117-ex312_57.htm

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<DESCRIPTION>EX-32.1
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Document 6 - file: ck0001728117-ex321_56.htm

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<DESCRIPTION>EX-32.2
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Document 7 - file: ck0001728117-ex322_55.htm

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Document 9 - file: grhe3vc04i2p000001.jpg

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Document 11 - file: grhe3vc04i2p000005.jpg

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Document 12 - file: grhe3vc04i2p000003.jpg

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Document 13 - file: grhe3vc04i2p000002.jpg

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