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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
1558685	Christopher Day	3101 Jay Street Santa Clara CA 95054	See Remarks	No	Yes	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	2013-09-13	400	$8.64	19,362	No	4	M	Direct
Ordinary Shares	Disposition	2013-09-13	400	$17.95	18,962	No	4	S	Direct
Ordinary Shares	Acquisiton	2013-09-16	1,200	$8.64	20,162	No	4	M	Direct
Ordinary Shares	Disposition	2013-09-16	1,200	$18.13	18,962	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Ordinary Shares	Stock Option (right to buy)	Disposition	2013-09-13	400	$0.00	400	$8.64
Ordinary Shares	Stock Option (right to buy)	Disposition	2013-09-16	1,200	$0.00	1,200	$8.64

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
56,450		2020-04-13	No	4	M	Direct
55,250		2020-04-13	No	4	M	Direct

Footnotes

The sales reported on this Form 4 were effected pursuant to Rule 10b5-1 trading plans adopted on June 15, 2013.
The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $17.95 to $17.96 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 (2) to this Form 4.6
The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $18.05 to $18.20 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.
Of the total grant of 100,000 shares, 25% vests on the one year anniversary of the date of grant, April 13, 2010, and the remaining shares vest in equal monthly installments over 36 months.