Alpha and Omega Semiconductor (AOSL): Mike F. Chang reports 13.9% ownership stake

Rhea-AI Filing Summary

Alpha and Omega Semiconductor Limited large shareholder Mike F. Chang filed an amended beneficial ownership report. As of June 30, 2026, he beneficially owned 4,212,201 common shares, representing 13.9% of the company’s outstanding common shares, based on 30,253,076 shares outstanding as of that date.

Chang held 3,436,169 shares with sole voting and dispositive power and 776,032 shares with shared voting and dispositive power. The filing indicates no ownership on behalf of a group or other persons above 5% and notes no applicable certifications or group arrangements.

Key Figures

Beneficially owned shares: 4,212,201 common shares Ownership percentage: 13.9% Shares outstanding: 30,253,076 common shares +3 more

6 metrics

Beneficially owned shares 4,212,201 common shares Aggregate beneficial ownership as of June 30, 2026

Ownership percentage 13.9% Percent of outstanding common shares beneficially owned

Shares outstanding 30,253,076 common shares Issued and outstanding as of June 30, 2026

Sole voting/dispositive power 3,436,169 common shares Shares over which Chang has sole voting and dispositive power

Shared voting/dispositive power 776,032 common shares Shares over which Chang has shared voting and dispositive power

Filing date signature 08/10/2026 Date signed by Mike F. Chang as Director

Key Terms

beneficially owned, sole voting power, shared dispositive power, percent of class, +1 more

5 terms

beneficially owned financial

"the aggregate amount beneficially owned by the Reporting Person is 4,212,201"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"The Reporting Person has sole power to vote or to direct the vote"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

shared dispositive power financial

"shared power to dispose or direct the disposition of 776,032 common shares"

percent of class financial

"The Reporting Person beneficially owned approximately 13.9% of the outstanding"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

Schedule 13G regulatory

"Ownership of more than 5 Percent on Behalf of Another Person."

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/10/2026 - 05:49 PM Accepted by SEC EDGAR 08/10/2026 - 05:48 PM Learn about SEC filing dates

FAQ

How many Alpha and Omega Semiconductor (AOSL) shares does Mike F. Chang beneficially own?

As of June 30, 2026, Mike F. Chang beneficially owned 4,212,201 common shares of Alpha and Omega Semiconductor Limited, according to the Schedule 13G/A filing, reflecting both his sole and shared voting and dispositive powers.

What percentage of Alpha and Omega Semiconductor (AOSL) does Mike F. Chang own?

The filing states that Mike F. Chang beneficially owned approximately 13.9% of Alpha and Omega Semiconductor’s outstanding common shares, calculated using 30,253,076 shares issued and outstanding as of June 30, 2026.

How are Mike F. Chang’s AOSL shares split between sole and shared control?

Mike F. Chang has sole voting and dispositive power over 3,436,169 shares and shared voting and dispositive power over 776,032 shares, as disclosed in the ownership section of the Schedule 13G/A filing.

What is the outstanding share count of Alpha and Omega Semiconductor (AOSL) used in this filing?

The Schedule 13G/A states that Alpha and Omega Semiconductor had 30,253,076 common shares issued and outstanding as of June 30, 2026, a figure the issuer disclosed to Mike F. Chang for calculating his ownership percentage.

Does the AOSL Schedule 13G/A indicate any group or third-party ownership related to Mike F. Chang?

The filing notes that items on group membership and ownership on behalf of another person are Not Applicable, indicating no reported group arrangement or other person with rights to more than 5% of the class through his holdings.

What class of securities is covered in Mike F. Chang’s AOSL Schedule 13G/A?

The Schedule 13G/A covers Alpha and Omega Semiconductor Limited’s Common Share class, identified by CUSIP number G6331P104, with ownership and voting/dispositive powers reported for this specific security.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 8)

Alpha and Omega Semiconductor Limited

(Name of Issuer)

Common Share

(Title of Class of Securities)

G6331P104

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): G6331P104

1

Names of Reporting Persons

Mike F. Chang

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 3,436,169.00
6	Shared Voting Power 776,032.00
7	Sole Dispositive Power 3,436,169.00
8	Shared Dispositive Power 776,032.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,212,201.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

13.9 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Alpha and Omega Semiconductor Limited
(b)	Address of issuer's principal executive offices: 475 Oakmead Parkway, Sunnyvale, California, 94085
Item 2.
(a)	Name of person filing: Mike F. Chang
(b)	Address or principal business office or, if none, residence: c/o Alpha and Omega Semiconductor Limited, 475 Oakmead Parkway, Sunnyvale, California 94085
(c)	Citizenship: U.S.A.
(d)	Title of class of securities: Common Share
(e)	CUSIP No.: G6331P104
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: As of June 30, 2026, the aggregate amount beneficially owned by the Reporting Person is 4,212,201 common shares of the Issuer. The Reporting Person has sole power to vote or to direct the vote and sole power to dispose or direct the disposition of 3,436,169 common shares, and shared power to vote or to direct the vote and shared power to dispose or direct the disposition of 776,032 common shares.
(b)	Percent of class: The Reporting Person beneficially owned approximately 13.9% of the outstanding common shares of the Issuer, which is calculated based on 30,253,076 common shares issued and outstanding as of June 30, 2026, as disclosed by the Issuer to the Reporting Person.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 3,436,169
	(ii) Shared power to vote or to direct the vote: 776,032
	(iii) Sole power to dispose or to direct the disposition of: 3,436,169
	(iv) Shared power to dispose or to direct the disposition of: 776,032
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. Not Applicable
Item 9.	Notice of Dissolution of Group.
	Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5. Not Applicable

Item 10.	Certifications:
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Mike F. Chang

Signature:	Mike F. Chang
Name/Title:	Mike F. Chang / Director
Date:	08/10/2026