Alpha & Omega Semiconductor (NASDAQ: AOSL) CFO updates share holdings in Form 4

Rhea-AI Filing Summary

Alpha & Omega Semiconductor Ltd officer and CFO and corporate secretary Yifan Liang reported a transaction involving 500 common shares of the company on 12/15/2025. The transaction, coded “G,” was reported at a price of $0 per share and left Liang with beneficial ownership of 280,271 common shares held directly.

The reported beneficial ownership includes 16,512 unvested shares from performance share units granted on March 15, 2022 and March 15, 2024, 45,000 unvested shares from a market-based performance share unit grant dated July 1, 2018, and 50,000 shares subject to restricted share unit awards granted on March 15, 2022, March 15, 2023, March 15, 2024, and March 17, 2025. It also reflects 235 shares acquired under the employee stock purchase plan on November 14, 2025 and excludes 22,500 unvested common shares subject to a March 17, 2025 performance share unit grant.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Liang Yifan

(Last) (First) (Middle)

475 OAKMEAD PARKWAY

(Street)

SUNNYVALE CA 94085

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ALPHA & OMEGA SEMICONDUCTOR Ltd [ AOSL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CFO and Corp Secretary

3. Date of Earliest Transaction (Month/Day/Year)
12/15/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Shares	12/15/2025		G		500	D	$0	280,271(1)(2)(3)(4)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Includes 16,512 unvested shares subject to the Performance Share Unit (PSU) granted on March 15, 2022 and March 15, 2024 which are subject to vesting upon satisfaction of service-based vesting conditions by the Reporting Person.

2. Includes 45,000 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.

3. Includes an aggregate of 50,000 shares subject to Restricted Share Unit awards (RSU) granted on March 15, 2022, March 15, 2023, March 15, 2024, and March 17, 2025 which will be issued as such units vest in accordance with their terms, and excludes 22,500 unvested common shares subject to the PSU granted on March 17, 2025, which may become vested upon achievement of certain corporate performance goals in the future.

4. Reflects 235 shares acquired under the Issuer's Employee Stock Purchase Plan on November 14, 2025.

Remarks:

	/s/ Yanbing Hong, attorney-in-fact for Yifan Liang	12/16/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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FAQ

Who filed the AOSL Form 4 and what is their relationship to Alpha & Omega Semiconductor?

The Form 4 was filed for Yifan Liang, who is identified as an officer of Alpha & Omega Semiconductor Ltd, serving as CFO and corporate secretary. The filing indicates it is a Form filed by one reporting person with a direct ownership form.

What insider transaction did the AOSL CFO report on December 15, 2025?

The reporting person disclosed a transaction in 500 common shares of Alpha & Omega Semiconductor on 12/15/2025. The transaction used code “G” and showed the 500 shares as disposed of at a reported price of $0 per share.

How many Alpha & Omega Semiconductor (AOSL) shares are beneficially owned after the reported transaction?

After the 12/15/2025 transaction, the reporting person shows 280,271 common shares of Alpha & Omega Semiconductor Ltd as beneficially owned, with ownership reported as direct.

What performance share units (PSUs and MSUs) are included in the AOSL insider’s beneficial ownership?

The beneficial ownership figure includes 16,512 unvested shares from performance share units granted on March 15, 2022 and March 15, 2024, and 45,000 unvested shares from a market-based performance share unit grant dated July 1, 2018, all subject to service-based vesting conditions.

What restricted share units (RSUs) are reflected in the AOSL Form 4 beneficial ownership total?

The explanation notes that beneficial ownership includes an aggregate of 50,000 shares subject to restricted share unit (RSU) awards granted on March 15, 2022, March 15, 2023, March 15, 2024, and March 17, 2025, which will be issued as those units vest in accordance with their terms.

What additional share awards or plans affect the AOSL CFO’s reported holdings?

The filing states that the total reflects 235 shares acquired under the issuer’s Employee Stock Purchase Plan on November 14, 2025. It also notes that the figure excludes 22,500 unvested common shares subject to a performance share unit grant dated March 17, 2025, which may vest upon achievement of certain corporate performance goals in the future.