<SEC-DOCUMENT>0001193125-18-139235-index.html : 20180427
<SEC-HEADER>0001193125-18-139235.hdr.sgml : 20180427
<ACCEPTANCE-DATETIME>20180427170102
ACCESSION NUMBER:		0001193125-18-139235
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20180427
DATE AS OF CHANGE:		20180427
EFFECTIVENESS DATE:		20180427

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AMBARELLA INC
		CENTRAL INDEX KEY:			0001280263
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				980459628
		FISCAL YEAR END:			0131

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35667
		FILM NUMBER:		18785274

	BUSINESS ADDRESS:	
		STREET 1:		3101 JAY STREET
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			95054
		BUSINESS PHONE:		408-734-8888

	MAIL ADDRESS:	
		STREET 1:		3101 JAY STREET
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			95054
</SEC-HEADER>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d576619ddefa14a.htm
<DESCRIPTION>DEFINITIVE ADDITIONAL MATERIALS
<TEXT>
Document 1 - file: d576619ddefa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g576619pic01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g576619pic01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g576619pic02.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g576619pic02.jpg

</DOCUMENT>
</SEC-DOCUMENT>