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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
1008463	Bu Lip Tan	One California Street, Suite 2800 San Francisco CA 94111		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	Explanation
Ordinary Shares	Disposition	2013-12-13	29,810	$0.00	753,188	No	4	J	Indirect	See Footnote
Ordinary Shares	Acquisiton	2013-12-13	22,506	$0.00	25,524	No	4	J	Indirect	See Footnote
Ordinary Shares	Disposition	2013-12-17	25,524	$24.89	0	No	4	S	Indirect	See Footnote

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

Footnotes

Represents a pro-rata, in-kind distribution by Pacven Walden Ventures V, L.P. and affiliated funds, without consideration, to their partners or shareholders as applicable.
The amount of the distribution previously reported did not include shares distributed to Pacven Walden Management Co., Ltd.
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 Pacven Walden Management Co., Ltd., of which Mr. Tan is the sole shareholder and director.
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 (5) to this Form 4.