<SEC-DOCUMENT>0001193125-18-178692-index.html : 20180530
<SEC-HEADER>0001193125-18-178692.hdr.sgml : 20180530
<ACCEPTANCE-DATETIME>20180530171155
ACCESSION NUMBER:		0001193125-18-178692
CONFORMED SUBMISSION TYPE:	SD
PUBLIC DOCUMENT COUNT:		2
<RULE>
<RULE-NAME>13p-1
<ITEM>
<ITEM-NUMBER>1.01
<ITEM-PERIOD>20171231
</ITEM>
<ITEM>
<ITEM-NUMBER>1.02
<ITEM-PERIOD>20171231
</ITEM>
</RULE>
FILED AS OF DATE:		20180530
DATE AS OF CHANGE:		20180530

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:		SD
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35667
		FILM NUMBER:		18869029

	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>SD
<SEQUENCE>1
<FILENAME>d593950dsd.htm
<DESCRIPTION>SD
<TEXT>
Document 1 - file: d593950dsd.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1.01
<SEQUENCE>2
<FILENAME>d593950dex101.htm
<DESCRIPTION>EX-1.01
<TEXT>
Document 2 - file: d593950dex101.htm

</DOCUMENT>
</SEC-DOCUMENT>