CFO of Alpha & Omega (NASDAQ: AOSL) sells 8,625 shares

Rhea-AI Filing Summary

ALPHA & OMEGA SEMICONDUCTOR Ltd CFO and Corporate Secretary Yifan Liang executed an open-market sale of 8,625 common shares at a weighted average price of $35.0004 per share under a pre-arranged Rule 10b5-1 trading plan. After this transaction, Liang directly holds 270,003 shares, which include substantial unvested equity awards such as market-based performance share units, performance share units, and restricted share units that remain subject to future vesting conditions.

Insider Trade Summary 10b5-1

Net Seller: 8,625 shares ($301,878)

Net Sell 1 txn

Insider Liang Yifan

Role CFO and Corp Secretary

Sold 8,625 shs ($302K)

Type	Security	Shares	Price	Value
Sale	Common Shares	8,625	$35.0004	$302K

Holdings After Transaction: Common Shares — 270,003 shares (Direct, null)

Footnotes (1)

1. The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 21, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.0000 to $35.0200, inclusive. The Reporting Person undertakes to provide to Alpha and Omega Semiconductor Limited, any security holder of Alpha and Omega Semiconductor Limited, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range. Includes 22,500 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. Includes 25,625 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. Includes an aggregate of 52,500 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 22,500 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.

Key Figures

Shares sold: 8,625 shares Average sale price: $35.0004 per share Post-transaction holdings: 270,003 shares +4 more

7 metrics

Shares sold 8,625 shares Open-market sale on April 17, 2026

Average sale price $35.0004 per share Weighted average price for sold shares

Post-transaction holdings 270,003 shares Common shares held directly after sale

Unvested MSUs 22,500 shares Market-Based Performance Share Units from July 1, 2018 grant

Unvested PSUs 25,625 shares Performance Share Units from March 15, 2024 and March 17, 2025 grants

Unvested RSUs 52,500 shares Restricted Share Unit awards from 2023–2026 grants

Excluded PSUs 22,500 shares 2026 PSU grant contingent on future corporate performance goals

Key Terms

Rule 10b5-1 trading plan, Market-Based Performance Share Unit (MSU), Performance Share Unit (PSU), Restricted Share Unit awards (RSU), +1 more

5 terms

Rule 10b5-1 trading plan regulatory

"The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Market-Based Performance Share Unit (MSU) financial

"Includes 22,500 unvested shares subject to the Market-Based Performance Share Unit (MSU) granted on July 1, 2018"

Performance Share Unit (PSU) financial

"Includes 25,625 unvested shares subject to the Performance Share Unit (PSU) granted on March 15, 2024 and March 17, 2025"

Restricted Share Unit awards (RSU) financial

"Includes an aggregate of 52,500 shares subject to Restricted Share Unit awards (RSU) granted on March 15, 2023, March 15, 2024, March 17, 2025, and March 16, 2026"

weighted average price financial

"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

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 CALIFORNIA 94085

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/17/2026

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

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

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

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	04/17/2026		S		8,625(1)	D	$35.0004(2)	270,003(3)(4)(5)	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. The sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 21, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.0000 to $35.0200, inclusive. The Reporting Person undertakes to provide to Alpha and Omega Semiconductor Limited, any security holder of Alpha and Omega Semiconductor Limited, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range.

3. Includes 22,500 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.

4. Includes 25,625 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.

5. Includes an aggregate of 52,500 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 22,500 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.

Remarks:

	/s/ Yanbing Hong, attorney-in-fact for Yifan Liang	04/20/2026
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did AOSL CFO Yifan Liang report?

Yifan Liang reported an open-market sale of 8,625 Alpha & Omega Semiconductor common shares. The transaction used a weighted average price of $35.0004 per share and was executed pursuant to a pre-arranged Rule 10b5-1 trading plan adopted earlier by the reporting person.

How many AOSL shares does the CFO hold after this Form 4 sale?

Following the sale, Yifan Liang holds 270,003 Alpha & Omega Semiconductor shares directly. This figure includes various unvested equity awards, such as performance-based and time-based share units, which will vest over time if specified service and performance conditions are met.

Was the AOSL CFO stock sale under a Rule 10b5-1 trading plan?

Yes. The filing states the sales were effected under a Rule 10b5-1 trading plan adopted on August 21, 2025. Such plans allow insiders to schedule trades in advance, helping separate personal trading decisions from day-to-day information about the company’s operations.

What price range did the AOSL CFO receive for the sold shares?

The weighted average sale price was $35.0004 per share, with individual trades executed between $35.0000 and $35.0200. The filing notes that detailed price and volume information for each transaction within this range is available upon request from the company, shareholders, or the SEC staff.

What unvested equity awards does the AOSL CFO still have?

The CFO’s holdings include 22,500 unvested market-based performance share units, 25,625 unvested performance share units from 2024 and 2025 grants, and 52,500 restricted share units. An additional 22,500 PSU shares from a 2026 grant are excluded until specified corporate performance goals are achieved.