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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1280263	Ambarella Inc	AMBA	Semiconductors & Related Devices (3674)	980459628

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1189229	B Christopher Paisley	3101 Jay Street Santa Clara CA 95054		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
Ordinary Shares	Acquisiton	2014-09-09	1,500	$6.00	4,278	No	4	M	Direct
Ordinary Shares	Disposition	2014-09-09	1,400	$38.99	2,878	No	4	S	Direct
Ordinary Shares	Disposition	2014-09-09	100	$39.67	2,778	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Ordinary Shares	Non-Qualified Stock Option (right to buy)	Disposition	2014-09-09	1,500	$0.00	1,500	$6.00
Ordinary Shares	Non-Qualified Stock Option (right to buy)	Acquisiton	2014-09-08	5,555	$0.00	5,555	$38.92
Ordinary Shares	Restricted Stock Units	Acquisiton	2014-09-08	2,778	$0.00	2,778	$0.00

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
25,167	2022-10-08	No	4	M	Direct
5,555	2024-09-07	No	4	A	Direct
2,778	2014-09-07	No	4	A	Direct

Footnotes

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on June 13, 2014.
The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $38.6400 to $39.3500 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 this Form 4.
Shares subject to the option vest monthly over four years beginning on August 20, 2012.
The shares subject to the option vest at a rate of 1/12 per month following the vesting start date of September 8, 2014.
Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.
The restricted stock units will vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2014, so as to be 100% vested on September 15, 2015.