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Filing Details

Accession Number:: 0001209191-13-057585
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2013-12-18 06:05:22
Reporting Period:: 2013-12-13

Filing Date:: 2013-12-18
Accepted Time:: 2013-12-18 06:05:22
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
1008463	Bu Lip Tan	One California Street, Suite 2800 San Francisco CA 94111		Yes	No	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	Explanation
Ordinary Shares	Acquisiton	2013-12-16	695	$0.00	1,389	No	4	M	Direct
Ordinary Shares	Disposition	2013-12-13	7,304	$0.00	775,694	No	4	J	Indirect	See Footnote
Ordinary Shares	Acquisiton	2013-12-13	1,994	$0.00	3,348	No	4	J	Indirect	See Footnote
Ordinary Shares	Acquisiton	2013-12-13	694	$0.00	694	No	4	J	Indirect	See Footnote
Ordinary Shares	Disposition	2013-12-17	694	$24.89	0	No	4	S	Indirect	See Footnote
Ordinary Shares	Acquisiton	2013-12-13	714	$0.00	714	No	4	J	Indirect	See Footnote
Ordinary Shares	Disposition	2013-12-17	714	$24.89	0	No	4	S	Indirect	See Footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	J	Indirect	See Footnote
No	4	J	Indirect	See Footnote
No	4	J	Indirect	See Footnote
No	4	S	Indirect	See Footnote
No	4	J	Indirect	See Footnote
No	4	S	Indirect	See Footnote

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Ordinary Shares	Restricted Stock Units	Disposition	2013-12-16	695	$0.00	695	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
1,389			No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Ordinary Shares	3,018	Indirect	See Footnote

Footnotes

Each RSU represents a contingent right to receive one share of the Issuer?s Ordinary Shares.
Represents a pro-rata, in-kind distribution by Pacven Walden Management V Co., Ltd., without consideration, to their partners or shareholders as applicable.
Such shares are held by Pacven Walden Ventures V, L.P. and affiliated funds. Mr. Tan disclaims beneficial ownership of these shares except to the extent of any pecuniary interest therein.
Such shares are held by Lip-Bu Tan & Ysa Loo Trust DTD 2/3/92.
Such shares are held by WIIG Pool, Inc., of which Mr. Tan is a director and shareholder. Mr. Tan disclaims beneficial ownership of the shares held by WIIG Pool, Inc. 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 $24.82 to $24.99 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 (6) to this Form 4.
Such shares are held by Reserve Holdings LLC, of which Mr. Tan is a director and shareholder. Mr. Tan disclaims beneficial ownership of the shares held by Reserve Holdings LLC except to the extent of any pecuniary interest therein.
Such shares are held by Pacven Walden Management Co., Ltd., of which Mr. Tan is the sole shareholder and director.
Of the total 2,778 shares, the RSUs vest as to one-fourth of the RSUs each three months following June 15, 2013.