<SEC-DOCUMENT>0001193125-18-292666-index.html : 20181004
<SEC-HEADER>0001193125-18-292666.hdr.sgml : 20181004
<ACCEPTANCE-DATETIME>20181004061413
ACCESSION NUMBER:		0001193125-18-292666
CONFORMED SUBMISSION TYPE:	424B4
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20181004
DATE AS OF CHANGE:		20181004

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MoSys, Inc.
		CENTRAL INDEX KEY:			0000890394
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				770291941
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		424B4
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-225193
		FILM NUMBER:		181106884

	BUSINESS ADDRESS:	
		STREET 1:		2309 BERING DRIVE
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95131
		BUSINESS PHONE:		408 418 7500

	MAIL ADDRESS:	
		STREET 1:		2309 BERING DRIVE
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95131

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MONOLITHIC SYSTEM TECHNOLOGY INC
		DATE OF NAME CHANGE:	19960613
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B4
<SEQUENCE>1
<FILENAME>d579907d424b4.htm
<DESCRIPTION>424B4
<TEXT>
Document 1 - file: d579907d424b4.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g579907img01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g579907img01.jpg

</DOCUMENT>
</SEC-DOCUMENT>