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Filing Details

Accession Number:: 0001181431-13-049778
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2013-09-18 18:21:13
Reporting Period:: 2013-09-16

Filing Date:: 2013-09-18
Accepted Time:: 2013-09-18 18:21:13
SEC Url:: Form 4 Filing

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

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Ordinary Shares	Acquisiton	2013-09-16	6,300	$8.82	61,240	No	4	M	Direct
Ordinary Shares	Disposition	2013-09-16	6,300	$18.13	54,940	No	4	S	Direct
Ordinary Shares	Acquisiton	2013-09-16	695	$0.00	55,635	No	4	M	Direct
Ordinary Shares	Disposition	2013-09-16	265	$17.80	59,553	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

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Ordinary Shares	Stock Option (right to buy)	Disposition	2013-09-16	6,300	$0.00	6,300	$8.82
Ordinary Shares	Restricted Stock Units	Disposition	2013-09-16	695	$0.00	695	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
258,532		2021-03-08	No	4	M	Direct
8,334			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 $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 (2) to this Form 4.
The RSUs convert into the Issuer's Ordinary Shares on a one-for-one basis.
Includes 4,183 shares acquired under the Company's employee stock purchase plan on September 16, 2013.
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.
Of the total grant of 11,112 RSUs, the RSUs vest as to 1/16 of the RSUs each three months following 9/15/12; provided however, that the RSUs shall not vest at all until either the expiration of the lock-up period applicable in connection with the Company's S-1 Registration Statement or upon a change of control transaction, at which time the original vesting schedule shall apply.