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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
1558646	George Laplante	3101 Jay Street Santa Clara CA 95054	Chief Financial Officer	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	Explanation
Ordinary Shares	Acquisiton	2013-09-10	23,500	$8.82	78,440	No	4	M	Direct
Ordinary Shares	Disposition	2013-09-10	23,500	$17.80	54,940	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
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	2013-09-10	23,500	$0.00	23,500	$8.82

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
265,032		2021-03-08	No	4	M	Direct

Footnotes

The sales reported on this Form 4 were effected pursuant to Rule 10b5-1 trading plans adopted on June 19, 2013.
The sale price reported in column 4 of Table I represents the weighted average sale price of the shares sold ranging from $17.41 to $18.04 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. This amended Form 4 is being filed to correct the dollar amount of the range.
An option to purchase 299, 643 shares was granted on March 8, 2011 and was exercised in part prior to the date on which the Reporting Person became subject to Section 16. One-fourth of the shares subject to the option vested on March 7, 2012 and one forty-eighth of the shares vest monthly thereafter. This option may be exercised prior to vesting subject to the Company's right to repurchase any shares that fail to vest as of termination of service.