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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
1558686	Feng-Ming Wang	3101 Jay Street Santa Clara CA 95054	President And Ceo	Yes	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	2013-09-16	1,042	$0.00	746,229	No	4	M	Direct
Ordinary Shares	Disposition	2013-09-16	396	$17.80	745,833	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	Restricted Stock Units	Disposition	2013-09-16	1,042	$0.00	1,042	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
12,501			No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Ordinary Shares	98,333	Indirect	See Footnote
Ordinary Shares	170,000	Indirect	See Footnote

Footnotes

The RSUs convert into the Issuer's Ordinary Shares on a one-for-one basis.
Shares held by Acorn Hall Irreversible Trust for the benefit of the reporting person's child. The reporting person disclaims beneficial ownership of these securities, and the filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or any other purpose.
Shares held by Tutu's Irrevocable Trust for the benefit of the reporting person's child. The reporting person disclaims beneficial ownership of these securities, and the filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or any other purpose.
Of the total grant of 16,667 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.