ALPHA & OMEGA SEMICONDUCTOR Ltd — Director's Dealing 2012

Feb 6, 2012

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL)
CIK: 0001387467
Period of Report: 2012-01-26

Reporting Person: Grizelj Tony (VP of World Wide Sales)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Shares	1750	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Employee Share Option (right to buy)	$2	2015-04-14	Common Shares (72000)		Direct
Employee Share Option (right to buy)	$13	2018-02-06	Common Shares (25000)		Direct
Employee Share Option (right to buy)	$18	2020-04-27	Common Shares (25000)		Direct
Employee Share Option (right to buy)	$12.68	2021-03-06	Common Shares (17500)		Direct

Footnotes

F1: As of February 6, 2012, the option is fully vested and immediately exercisable for all option shares.

F2: The option was granted on February 7, 2008 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 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.

F4: 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.