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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1280263	Ambarella Inc	AMBA	Semiconductors & Related Devices (3674)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1205979	W Andrew Verhalen	260 Homer Avenue, Suite 201 Palo Alto CA 94301		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Ordinary Shares	Disposition	2013-09-26	1,000,000	$0.00	938,363	No	4	J	Indirect	See Footnote
Ordinary Shares	Acquisiton	2013-09-26	26,515	$0.00	66,760	No	4	J	Direct
Ordinary Shares	Acquisiton	2013-09-26	2,234	$0.00	3,694	No	4	J	Indirect	By Nicole Brownstone Verhalen 1997 Trust
Ordinary Shares	Disposition	2013-09-26	1,847	$19.28	1,847	No	4	S	Indirect	By Nicole Brownstone Verhalen 1997 Trust
Ordinary Shares	Acquisiton	2013-09-26	2,234	$0.00	3,694	No	4	J	Indirect	By Sara Rose Verhalen 1997 Trust
Ordinary Shares	Disposition	2013-09-26	1,847	$19.28	1,847	No	4	S	Indirect	By Sara Rose Verhalen 1997 Trust
Ordinary Shares	Acquisiton	2013-09-26	8,936	$0.00	14,775	No	4	J	Indirect	By Verhalen Brownstone Family Partners
Ordinary Shares	Disposition	2013-09-26	14,775	$19.10	0	No	4	S	Indirect	By Verhalen Brownstone Family Partners

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	J	Indirect	See Footnote
No	4	J	Direct
No	4	J	Indirect	By Nicole Brownstone Verhalen 1997 Trust
No	4	S	Indirect	By Nicole Brownstone Verhalen 1997 Trust
No	4	J	Indirect	By Sara Rose Verhalen 1997 Trust
No	4	S	Indirect	By Sara Rose Verhalen 1997 Trust
No	4	J	Indirect	By Verhalen Brownstone Family Partners
No	4	S	Indirect	By Verhalen Brownstone Family Partners

Footnotes

Represents a pro-rata, in-kind distribution by Matrix Partners VII, L.P., without consideration, to its partners.
Includes 938,363 shares held by Matrix Partners VII, L.P. Mr. Verhalen is a managing member of Matrix VII Management Co., L.L.C., which is the general partner of Matrix Partners VII, L.P. Mr. Verhalen disclaims beneficial ownership of the Matrix VII, L.P. shares except to the extent of any pecuniary interest therein.
The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $19.16 to $19.52 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (3) to this Form 4.
The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $19.05 to $19.52 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the reporting person will provide full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (4) to this Form 4.