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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1387467	Alpha & Omega Semiconductor Ltd	AOSL	Semiconductors & Related Devices (3674)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1522325	Yifan Liang	475 Oakmead Parkway Sunnyvale CA 94085	Chief Accounting 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
Common Shares	Disposition	2012-12-31	36	$8.40	12,746	No	4	F	Direct
Common Shares	Disposition	2012-12-31	10,500	$8.00	2,246	No	4	S	Direct
Common Shares	Acquisiton	2013-01-02	7,142	$2.00	9,388	No	4	M	Direct
Common Shares	Disposition	2013-01-02	7,142	$9.00	2,246	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	F	Direct
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Shares	Employee Share Option (right to buy)	Disposition	2013-01-02	7,142	$0.00	7,142	$2.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
15,858		2015-04-14	No	4	M	Direct

Footnotes

Shares withheld to satisfy the Issuer's tax withholding obligation upon the vesting of restricted stock units.
Includes (i) 1,223 shares subject to a restricted stock unit award granted on April 26, 2012 that will be issued as those units vest and (ii) 875 shares acquired under the Issuer's Employee Stock Purchase Plan on November 14, 2012.
The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 12, 2012, as amended.
As of January 2, 2013, the option is fully vested and immediately exercisable for all option shares.