<SEC-DOCUMENT>0001193125-18-274668-index.html : 20180917
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<ACCEPTANCE-DATETIME>20180917070323
ACCESSION NUMBER:		0001193125-18-274668
CONFORMED SUBMISSION TYPE:	S-1/A
PUBLIC DOCUMENT COUNT:		29
FILED AS OF DATE:		20180917
DATE AS OF CHANGE:		20180917

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SUTRO BIOPHARMA INC
		CENTRAL INDEX KEY:			0001382101
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				452441988
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-1/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-227103
		FILM NUMBER:		181072388

	BUSINESS ADDRESS:	
		STREET 1:		310 UTAH AVE., SUITE 150
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
		BUSINESS PHONE:		650-392-8412

	MAIL ADDRESS:	
		STREET 1:		310 UTAH AVE., SUITE 150
		CITY:			SOUTH SAN FRANCISCO
		STATE:			CA
		ZIP:			94080
</SEC-HEADER>
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<TYPE>S-1/A
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<FILENAME>d553197ds1a.htm
<DESCRIPTION>S-1/A
<TEXT>
Document 1 - file: d553197ds1a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1.1
<SEQUENCE>2
<FILENAME>d553197dex11.htm
<DESCRIPTION>FORM OF UNDERWRITING AGREEMENT
<TEXT>
Document 2 - file: d553197dex11.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-3.1
<SEQUENCE>3
<FILENAME>d553197dex31.htm
<DESCRIPTION>PRE-IPO CERTIFICATE OF INCORPORATION
<TEXT>
Document 3 - file: d553197dex31.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-3.2
<SEQUENCE>4
<FILENAME>d553197dex32.htm
<DESCRIPTION>POST-IPO CERTIFICATE OF INCORPORATION
<TEXT>
Document 4 - file: d553197dex32.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-3.4
<SEQUENCE>5
<FILENAME>d553197dex34.htm
<DESCRIPTION>POST-IPO BYLAWS
<TEXT>
Document 5 - file: d553197dex34.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>6
<FILENAME>d553197dex51.htm
<DESCRIPTION>OPINION OF FENWICK & WEST LLP
<TEXT>
Document 6 - file: d553197dex51.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.1
<SEQUENCE>7
<FILENAME>d553197dex101.htm
<DESCRIPTION>FORM OF INDEMNITY AGREEMENT
<TEXT>
Document 7 - file: d553197dex101.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.4
<SEQUENCE>8
<FILENAME>d553197dex104.htm
<DESCRIPTION>2018 EQUITY INCENTIVE PLAN AND FORMS OF AWARD AGREEMENTS
<TEXT>
Document 8 - file: d553197dex104.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.5
<SEQUENCE>9
<FILENAME>d553197dex105.htm
<DESCRIPTION>2018 EMPLOYEE STOCK PURCHASE PLAN AND FORMS OF AWARD AGREEMENTS
<TEXT>
Document 9 - file: d553197dex105.htm

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<DOCUMENT>
<TYPE>EX-10.11
<SEQUENCE>10
<FILENAME>d553197dex1011.htm
<DESCRIPTION>CELGENE LICENSE AGREEMENT
<TEXT>
Document 10 - file: d553197dex1011.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-10.13
<SEQUENCE>11
<FILENAME>d553197dex1013.htm
<DESCRIPTION>STANFORD LICENSE AGREEMENT
<TEXT>
Document 11 - file: d553197dex1013.htm

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<TYPE>EX-10.15
<SEQUENCE>12
<FILENAME>d553197dex1015.htm
<DESCRIPTION>MERCK LICENSE AGREEMENT
<TEXT>
Document 12 - file: d553197dex1015.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>13
<FILENAME>d553197dex231.htm
<DESCRIPTION>CONSENT OF ERNST & YOUNG LLP
<TEXT>
Document 13 - file: d553197dex231.htm

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<DESCRIPTION>GRAPHIC
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Document 14 - file: g553197g01h12.jpg

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Document 15 - file: g553197g10b20.jpg

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Document 16 - file: g553197g16p90.jpg

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Document 17 - file: g553197g20j01.jpg

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Document 18 - file: g553197g21v93.jpg

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Document 19 - file: g553197g33e47.jpg

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Document 20 - file: g553197g39v42.jpg

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Document 21 - file: g553197g45v80.jpg

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Document 22 - file: g553197g47y05.jpg

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Document 23 - file: g553197g51k44.jpg

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Document 24 - file: g553197g55s24.jpg

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Document 25 - file: g553197g61j23.jpg

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Document 26 - file: g553197g62l95.jpg

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Document 27 - file: g553197g90x13.jpg

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Document 28 - file: g553197g96u56.jpg

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Document 29 - file: g553213g0910161336269.jpg

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