Wenjun Li - 16 Mar 2026 Form 4 Insider Report for ALPHA & OMEGA SEMICONDUCTOR Ltd (AOSL)

Role: Chief Operating Officer
Signature: /s/ Yanbing Hong, attorney-in-fact for Wenjun Li
Issuer symbol: AOSL
Transactions as of: 16 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 18 Mar 2026, 16:02:29 UTC
Previous filing: 05 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Li Wenjun	Chief Operating Officer	475 OAKMEAD PKWY, SUNNYVALE	/s/ Yanbing Hong, attorney-in-fact for Wenjun Li	18 Mar 2026	0001878542

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AOSL	Common Share	Award		+10,000	+14%	$0.000000^*	82,165	16 Mar 2026	Direct	F1, F2, F3, F4
transaction	AOSL	Common Share	Tax liability		-3,272	-4%	$21.43^*	78,893	16 Mar 2026	Direct	F2, F3, F4, F5
transaction	AOSL	Common Share	Tax liability		-2,267	-2.9%	$21.43^*	76,626	16 Mar 2026	Direct	F2, F3, F4, F6
transaction	AOSL	Common Share	Award		+10,000	+13%	$0.000000^*	86,626	16 Mar 2026	Direct	F2, F3, F4, F7

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The Restricted Share Unit (RSU) shall vest in equal annual installments over four (4) years from March 16, 2026, provided that the Reporting Person remains in the Issuer's service through each such vesting date.
F2	Includes 7,500 unvested shares subject to the Market-Based Performance Share Unit (MSU) granted on July 1, 2018 which are subject to vesting upon satisfaction of service-based vesting conditions by the Reporting Person.
F3	Includes 12,500 unvested shares subject to the Performance Share Unit (PSU) granted on March 15, 2024 and March 17, 2025 which are subject to vesting upon satisfaction of service-based vesting conditions by the Reporting Person.
F4	Includes an aggregate of 25,000 shares subject to Restricted Share Unit awards (RSU) granted on March 15, 2023, March 15, 2024, March 17, 2025, and March 16, 2026 which will be issued as such units vest in accordance with their terms, and excludes 10,000 unvested common shares subject to the PSU granted on March 16, 2026, which may become vested upon achievement of certain corporate performance goals in the future.
F5	Shares withheld to satisfy the Issuer's tax withholding obligation upon vesting of Restricted Share Units (RSU) granted on March 15, 2022, March 15, 2023, March 15, 2024, and March 17, 2025.
F6	Shares withheld to satisfy the Issuer's tax withholding obligation upon the vesting of Performance Share Units (PSU) granted on March 15, 2022, March 15, 2024, and March 17, 2025.
F7	Represents PSU granted on March 17, 2025 upon the achievement of specified performance goals as certified previously by the Compensation Committee on March 5, 2026 and the issuance of shares thereunder is subject to vesting in four equal annual installment commencing on March 17, 2026 provided that the Reporting Person remains in the issuer's service through each such vesting date.