ALPHA & OMEGA SEMICONDUCTOR Ltd — Director's Dealing 2011

Jul 1, 2011

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL)
CIK: 0001387467
Period of Report: 2011-07-01

Reporting Person: Chang Mike F (Director, Chief Executive Officer, 10% Owner)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Shares	4144836	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Employee Share Option (right to buy)	$14.30	2012-11-06	Common Shares (34965)		Direct
Employee Share Option (right to buy)	$13.00	2012-11-06	Common Shares (90035)		Direct
Employee Share Option (right to buy)	$18.00	2020-04-27	Common Shares (125000)		Direct
Employee Share Option (right to buy)	$12.68	2021-03-06	Common Shares (94000)		Direct

Footnotes

F1: The option was granted on November 7, 2007 and becomes exercisable with respect to one-fifth (1/5) of the underlying shares on the first anniversary of the grant date, and thereafter the balance of the option shares become exercisable in a series of forty-eight (48) successive equal monthly installments.

F2: The option was granted on April 28, 2010 and becomes exercisable with respect to one-fifth (1/5) of the underlying shares on the first anniversary of the grant date, and thereafter the balance of the option shares become exercisable in a series of forty-eight (48) successive equal monthly installments.

F3: The option was granted on March 7, 2011 and becomes exercisable with respect to one-fifth (1/5) of the underlying shares on the first anniversary of the grant date, and thereafter the balance of the option shares become exercisable in a series of forty-eight (48) successive equal monthly installments.