ALPHA & OMEGA SEMICONDUCTOR Ltd — Director's Dealing 2021

Nov 2, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL)
CIK: 0001387467
Period of Report: 2021-11-01

Reporting Person: Liang Yifan (CFO and Corp Secretary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-11-01	Common Shares	M	6600	$9.90	Acquired	159413	Direct
2021-11-01	Common Shares	S	6600	$35.90	Disposed	153475	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-11-01	Employee Share Option (right to buy)	$9.9	M	6600	Disposed	2022-04-25	Common Share (6600.0)	Direct

Footnotes

F1: Includes an aggregate of 40,375 shares subject to Restricted Share Unit awards (RSU) granted on March 15, 2018, March 15, 2019, March 16, 2020, and March 15, 2021 which will be issued as such units vest in accordance with their terms, and excludes (a) 17,500 unvested common shares subject to the PSU granted on March 15, 2021, which may become vested upon achievement of certain corporate performance goals in the future and (b) 5,500 unvested common shares subject to the 2018 PSU which may be vested upon satisfaction of service-based vesting conditions by the Reporting Person.

F2: Reflects 662 shares acquired under the Issuer's Employee Stock Purchase Plan on May 14, 2021.

F3: Includes 13,125 unvested common shares subject to the 2020 PSU granted on March 16, 2020 which may be vested upon satisfaction of service-based vesting conditions by the Reporting Person.

F4: The sales were effected pursuant to a Rule 10b5-1 trading plan adopted previously by the Reporting Person.

F5: The price reported in Column 4 is the exact price at which all shares were sold.

F6: All options are fully vested and exercisable.