AOSL / Alpha and Omega Semiconductor Limited - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Alpha and Omega Semiconductor Limited
US ˙ NasdaqGS ˙ BMG6331P1041

Mga Batayang Estadistika
LEI 5493001FE7J03YOV2V35
CIK 1387467
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Alpha and Omega Semiconductor Limited
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
August 28, 2025 EX-FILING FEES

CALCULATION OF FILLING FEE TABLES Form S-8 (Form Type) ALPHA AND OMEGA SEMICONDUCTOR LIMITED (Exact Name of Registrant as Specified in Its Charter) Table 1 – Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount R

Exhibit 107 CALCULATION OF FILLING FEE TABLES Form S-8 (Form Type) ALPHA AND OMEGA SEMICONDUCTOR LIMITED (Exact Name of Registrant as Specified in Its Charter) Table 1 – Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price per Unit (2) Maximum Aggregate Offering Price Fee Rate Amount Registration Fee Equity Common Shares, $0.

August 28, 2025 EX-99.1

Chongqing Alpha and Omega Semiconductor Limited Index to Financial Statements

Exhibit 99.1 Chongqing Alpha and Omega Semiconductor Limited Index to Financial Statements Pages Report of Independent Auditor F-2 Balance Sheets as of December 31, 2024 and 2023 F-4 Statements of Operations for the Years Ended December 31, 2024 and 2023 F-5 Statements of Equity for the Years Ended December 31, 2024 and 2023 F-6 Statements of Cash Flows for the Years Ended December 31, 2024 and 20

August 28, 2025 EX-21.1

SUBSIDIARIES OF THE REGISTRANT Subsidiary Name Incorporated Location Percentage Owned Alpha and Omega Semiconductor Incorporated California, United States 100% owned by AOS Alpha and Omega Semiconductor (Cayman) Ltd. Cayman 100% owned by AOS Alpha an

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT Subsidiary Name Incorporated Location Percentage Owned Alpha and Omega Semiconductor Incorporated California, United States 100% owned by AOS Alpha and Omega Semiconductor (Cayman) Ltd. Cayman 100% owned by AOS Alpha and Omega Semiconductor (Shanghai) Co., Ltd. China 100% owned by AOS Alpha & Omega Semiconductor (Shenzhen) Limited China 100% owned by AOS

August 28, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and Omega Sem

August 28, 2025 S-8

As filed with the Securities and Exchange Commission on August 28, 2025

As filed with the Securities and Exchange Commission on August 28, 2025 Registration No.

August 6, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2025 Alpha and Omega Se

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 6, 2025 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporation)

August 6, 2025 EX-99.1

GAAP Financial Comparison Annually (in millions, except percentage and per share data) (unaudited) Year Ended June 30, 2025 2024 Revenue $ 696.2 $ 657.3 Gross Margin 23.1 % 26.2 % Operating Loss $ (28.4) $ (3.8) Net Loss $ (97.0) $ (11.1) Net Loss Pe

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2025 SUNNYVALE, California, August 6, 2025 (BUSINESS WIRE) - Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL), today reported financial results for the fiscal fourth quarter and the fiscal year ended June 30, 2025. The results for the fiscal fourth quarter ended

August 6, 2025 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended June 30, 2025

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended June 30, 2025 Steven Pelayo Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2025 fourth quarter. I am Steven Pelayo, Investor Relations representative for AOS. With me today are Stephen Chang, our CEO, and Yifan Liang,

July 14, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 14, 2025 Alpha and Omega Sem

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 14, 2025 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction) of incorporation

July 14, 2025 EX-99.1

AOS Announced $150 Million Sale of a Portion of its Equity Interest in CQJV

Exhibit 99.1 AOS Announced $150 Million Sale of a Portion of its Equity Interest in CQJV SUNNYVALE, California, July 14, 2025 - Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) announced today that it has entered into an equity transfer agreement with a strategic investor to sell approximately 20.3% of outstanding equity interest of AOS’s joint venture of power semiconductor packaging,

June 4, 2025 CORRESP

June 4, 2025

June 4, 2025 VIA EDGAR CONFIDENTIAL U.S. Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F. Street, N.E. Washington, D.C. 20549 Attn: Dale Welcome and Kevin Stertzel Re: Alpha & Omega Semiconductor Limited Form 10-K for the Fiscal Year Ended June 40, 2024 Form 8-K filed November 25, 2024 Response dated April 25, 2025 File No. 001-34717 Dear Mr. Welcom

June 4, 2025 8-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) Current Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): November 19,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) Current Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): November 19, 2024 ALPHA & OMEGA SEMICONDUCTOR Ltd (Exact Name of Registrant as Specified in Its Charter) 001-34717 (Commission File Number) Bermuda 00-0000000 (Sta

May 8, 2025 EX-10.1

Calendar Year 2025 Executive Incentive Cash Bonus Plan

Exhibit 10.1 ALPHA AND OMEGA SEMICONDUCTOR LIMITED CALENDAR YEAR 2025 EXECUTIVE INCENTIVE CASH BONUS PLAN The following is a summary of the operation of the Executive Incentive Cash Bonus Plan (the “Plan”) established by Alpha and Omega Semiconductor Limited (the “Company”) for the calendar year commencing January 1, 2025. Participants Executive officers and Vice Presidents. Performance Bonus Part

May 8, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and

May 7, 2025 EX-99.1

Alpha and Omega Semiconductor Limited Condensed Consolidated Statements of Operations (in thousands, except percentages and per share amounts) (unaudited) Three Months Ended Nine Months Ended March 31, 2025 December 31, 2024 March 31, 2024 March 31,

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2025 Ended March 31, 2025 SUNNYVALE, California, May 7, 2025 - Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal third quarter of 2025 ended March 31, 2025. The results for the fiscal third quarter of 2025 ended March 31, 2025 were as follo

May 7, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2025 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporation) (C

May 7, 2025 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended March 31, 2025 May 7, 2025

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended March 31, 2025 May 7, 2025 Steven Pelayo Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2025 third quarter financial results for the quarter ended March 31, 2025. I am Steven Pelayo, Investor Relations representative

April 25, 2025 CORRESP

April 25, 2025

April 25, 2025 VIA EDGAR CONFIDENTIAL U.S. Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F. Street, N.E. Washington, D.C. 20549 Attn: Dale Welcome and Kevin Stertzel Re: Alpha & Omega Semiconductor Limited Form 10-K for the Fiscal Year Ended June 30, 2024 Filed August 23, 2024 Form 8-K filed November 25, 2024 Form 8-K filed February 5, 2025 File No.

March 4, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 28, 2025 Alpha and Omega

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 28, 2025 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporati

February 28, 2025 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter)

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February 6, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha a

February 6, 2025 EX-10.1

rth Supplement to Non-Exclusive Distributor Agreement dated as of January 1, 2024 between Alpha & Omega Semiconductor (Hong Kong) Limited and Frontek Technology Corporation.

February 6, 2025 EX-10.2

Fifth Supplement to Distribution Agreement dated as of July 1, 2024 between Alpha & Omega Semiconductor (Hong Kong) Limited and Frontek Technology Corporation.

February 6, 2025 EX-10.3

Fourth Supplement to Distribution Agreement dated as of July 1, 2024 between Alpha & Omega Semiconductor (Hong Kong) Limited and Promate Electronic Co., Ltd..

February 5, 2025 EX-99.1

Alpha and Omega Semiconductor Limited Condensed Consolidated Statements of Operations (in thousands, except percentages and per share amounts) (unaudited) Three Months Ended Six Months Ended December 31, 2024 September 30, 2024 December 31, 2023 Dece

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2025 Ended December 31, 2024 SUNNYVALE, California, February 5, 2025 - Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal second quarter of 2025 ended December 31, 2024. The results for the fiscal second quarter of 2025 ended December 31, 2

February 5, 2025 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended December 31, 2024 February 5, 2025

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended December 31, 2024 February 5, 2025 Steven Pelayo Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2025 second quarter financial results. I am Steven Pelayo, Investor Relations representative for AOS. With me today are S

February 5, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 5, 2025 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporatio

November 25, 2024 EX-16.1

Letter from Baker Tilly USA, LLP to the Securities and Exchange Commission.

November 25, 2024 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 19, 2024 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction) (Commission)

November 12, 2024 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 7, 2024 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporatio

November 5, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha

November 4, 2024 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended September 30, 2024 November 4, 2024

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended September 30, 2024 November 4, 2024 Steven Pelayo Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2025 first quarter financial results. I am Steven Pelayo, Investor Relations representative for AOS. With me today are S

November 4, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2024 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporatio

November 4, 2024 EX-99.1

Alpha and Omega Semiconductor Limited Condensed Consolidated Statements of Operations (in thousands, except percentages and per share amounts) (unaudited) Three Months Ended September 30, 2024 June 30, 2024 September 30, 2023 Revenue $ 181,887 $ 161,

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2025 Ended September 30, 2024 SUNNYVALE, California, November 4, 2024 - Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal first quarter of 2025 ended September 30, 2024. The results for the fiscal first quarter of 2025 ended September 30, 2

September 25, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

September 25, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

August 23, 2024 EX-99.1

Chongqing Alpha and Omega Semiconductor Limited Report of Independent Auditor

Exhibit 99.1 Chongqing Alpha and Omega Semiconductor Limited Index to Financial Statements Pages Report of Independent Auditor F-2 Balance Sheets as of December 31, 2023 and 2022 F-4 Statements of Operations for the Years ended December 31, 2023 and 2022 F-5 Statements of Equity for the Years ended December 31, 2023 and 2022 F-6 Statements of Cash Flows for the years ended December 31, 2023 and 20

August 23, 2024 EX-10.21

Alpha & Omega Semiconductor Limited 2018 Employee Purchase Plan (as amended and restated effective as of November 9, 2023)

Exhibit 10.21 ALPHA AND OMEGA SEMICONDUCTOR LIMITED 2018 EMPLOYEE SHARE PURCHASE PLAN (As amended and restated effective November 9, 2023) I.PURPOSE OF THE PLAN This 2018 Employee Share Purchase Plan is intended to promote the interests of Alpha and Omega Semiconductor Limited, a company incorporated and existing under the laws of the Islands of Bermuda, by providing eligible employees with the op

August 23, 2024 EX-10.32

Market Performance Restricted Share Unit Agreement

Exhibit 10.32 ALPHA AND OMEGA SEMICONDUCTOR LIMITED MARKET PERFORMANCE RESTRICTED SHARE UNIT AGREEMENT RECITALS A. The Board has adopted the Plan for the purpose of retaining the services of selected Employees and consultants and other independent advisors who provide services to the Company (or any Parent or Subsidiary). B. Participant is to render valuable services to the Company (or a Parent or

August 23, 2024 EX-21.1

List of Subsidiaries of the Registrant

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT Subsidiary Name Incorporated Location Percentage Owned Alpha and Omega Semiconductor Incorporated California, United States 100% owned by AOS Alpha and Omega Semiconductor (Cayman) Ltd. Cayman 100% owned by AOS Alpha and Omega Semiconductor (Shanghai) Co., Ltd. China 100% owned by AOS Alpha & Omega Semiconductor (Shenzhen) Limited China 100% owned by AOS

August 23, 2024 EX-97

Compensation of Recoupment Policy dated October 2, 2023

Exhibit 97 ALPHA AND OMEGA SEMICONDUCTOR LIMITED COMPENSATION RECOUPMENT POLICY I.

August 23, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and Omega Sem

August 23, 2024 EX-19.1

Statement of Company Policy Regarding Insider Trading amended and restated

Exhibit 19.1 STATEMENT OF COMPANY POLICY REGARDING INSIDER TRADING Amended and Restated on May 11, 2023 This policy applies to all officers, directors and employees of Alpha and Omega Semiconductor Limited and its subsidiaries (collectively, the “Company”) and supersedes all prior insider trading policies of the Company. I.THE NEED FOR A POLICY STATEMENT Under the federal securities laws, it is il

August 7, 2024 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter and Fiscal Year Ended June 30, 2024 August 7, 2024

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter and Fiscal Year Ended June 30, 2024 August 7, 2024 Steve Pelayo Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2024 fourth quarter and annual financial results. I am Steven Pelayo, Investor Relations representative for AOS.

August 7, 2024 EX-99.1

GAAP Financial Comparison Annually (in millions, except percentage and per share data) (unaudited) Year Ended June 30, 2024 2023 Revenue $ 657.3 $ 691.3 Gross Margin 26.2 % 28.9 % Operating Income (Loss) $ (3.8) $ 22.5 Net Income (Loss) $ (11.1) $ 12

EXHIBIT 99.1 Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2024 SUNNYVALE, California, August 7, 2024 (BUSINESS WIRE) - Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL), today reported financial results for the fiscal fourth quarter and the fiscal year ended June 30, 2024. The results for the fiscal fourth quarter ended

August 7, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2024 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporation)

May 8, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 CALCULATION OF FILLING FEE TABLES Form S-8 (Form Type) ALPHA AND OMEGA SEMICONDUCTOR LIMITED (Exact Name of Registrant as Specified in Its Charter) Table 1 – Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered Proposed Maximum Offering Price per Unit (3) Maximum Aggregate Offering Price Fee Rate Amount Registration Fee Equity Common Shares, $0.

May 8, 2024 S-8

As filed with the Securities and Exchange Commission on May 8, 2024

As filed with the Securities and Exchange Commission on May 8, 2024 Registration No.

May 8, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and

May 7, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 7, 2024 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporation) (C

May 7, 2024 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended March 31, 2024 May 7, 2024

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended March 31, 2024 May 7, 2024 Steve Pelayo Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2024 third quarter financial results. I am Steven Pelayo, Investor Relations representative for AOS. With me today are Stephen Cha

May 7, 2024 EX-99.1

Alpha and Omega Semiconductor Limited Condensed Consolidated Statements of Operations (in thousands, except percentages and per share amounts) (unaudited) Three Months Ended Nine Months Ended March 31, 2024 December 31, 2023 March 31, 2023 March 31,

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2024 Ended March 31, 2024 SUNNYVALE, California, May 7, 2024 - Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal third quarter of 2024 ended March 31, 2024. The results for the fiscal third quarter of 2024 ended March 31, 2024 were as follo

March 4, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter)

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February 13, 2024 SC 13G/A

AOSL / Alpha and Omega Semiconductor Limited / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0236-alphaomegasemiconduct.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2)* Name of issuer: Alpha & Omega Semiconductor Ltd Title of Class of Securities: Common Stock CUSIP Number: G6331P104 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriat

February 12, 2024 SC 13G/A

AOSL / Alpha and Omega Semiconductor Limited / Chang Mike F - SC 13G/A MIKE CHANG 2023 Passive Investment

SC 13G/A 1 mikechang-13gx2023.htm SC 13G/A MIKE CHANG 2023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) AND (c) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(b) (Amendment No. 6)* Alpha and Omega Semiconductor Limited (Name of Issuer) Common Shares, $0.002 par value per share (Title

February 9, 2024 SC 13G/A

AOSL / Alpha and Omega Semiconductor Limited / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 7 )* Alpha & Omega Semiconductor Ltd (Name of Issuer) Common Stock (Title of Class of Securities) G6331P104 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the approp

February 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha a

February 6, 2024 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended December 31, 2023 February 6, 2024

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended December 31, 2023 February 6, 2024 Steven Pelayo Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2024 second quarter financial results. I am Steve Pelayo, Investor Relations representative for AOS. With me today are St

February 6, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

February 6, 2024 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2024 Ended December 31, 2023

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2024 Ended December 31, 2023 SUNNYVALE, Calif.-(BUSINESS WIRE)-February 6, 2024-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal second quarter of 2024 ended December 31, 2023. The results for the fiscal second quarter of 2024 ended Decem

January 25, 2024 8-K

Financial Statements and Exhibits, Other Events

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

January 25, 2024 EX-99.1

Alpha and Omega Semiconductor Announces Closing of DOJ Investigation

Exhibit 99.1 Alpha and Omega Semiconductor Announces Closing of DOJ Investigation SUNNYVALE, Calif.-(BUSINESS WIRE)-January 25, 2024-As previously disclosed by Alpha and Omega Semiconductor Limited (the “Company”), since late 2019, the Company has been cooperating with the U.S. Department of Justice (“DOJ”) in connection with its criminal investigation into the Company’s compliance with export con

November 14, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 9, 2023 Alpha and Omega

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 9, 2023 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporatio

November 7, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha

November 6, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 6, 2023 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended September 30, 2023 November 6, 2023

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended September 30, 2023 November 6, 2023 Yujia Zhai Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2024 first quarter financial results. I am Yujia Zhai, Investor Relations representative for AOS. With me today are Stephen

November 6, 2023 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2024 Ended September 30, 2023

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2024 Ended September 30, 2023 SUNNYVALE, Calif.-(BUSINESS WIRE)-November 6, 2023-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal first quarter of 2024 ended September 30, 2023. The results for the fiscal first quarter of 2024 ended Septem

September 25, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

September 25, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

August 29, 2023 EX-99.1

Chongqing Alpha and Omega Semiconductor Limited Report of Independent Auditor

Exhibit 99.1 Chongqing Alpha and Omega Semiconductor Limited Index to Financial Statements Page Report of Independent Auditor F-2 Balance Sheets as of December 31, 2022 and 2021 F-4 Statements of Operations for the one month ended December 31, 2021 and the Year ended December 31, 2022 F-5 Statements of Equity for the one month ended December 31, 2021 and the Year ended December 31, 2022 F-6 Statem

August 29, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and Omega Sem

August 29, 2023 EX-21.1

List of Subsidiaries of the Registrant

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT Subsidiary Name Incorporated Location Percentage Owned Alpha and Omega Semiconductor Incorporated California, United States 100% owned by AOS Alpha and Omega Semiconductor (Cayman) Ltd. Cayman 100% owned by AOS Alpha and Omega Semiconductor (Shanghai) Co., Ltd. China 100% owned by AOS Alpha & Omega Semiconductor (Shenzhen) Limited China 100% owned by AOS

August 29, 2023 EX-4.2

Description of Securities of the Registrant

Exhibit 4.2 Description of Share Capital Alpha and Omega Semiconductor Ltd. (“we”, “our” or the “Company”) a limited liability exempted company incorporated under the laws of Bermuda on September 27, 2000 under the name Alpha and Omega Semiconductor Limited. We are registered with the Registrar of Companies in Bermuda under registration number 292750. Our registered office is located at Clarendon

August 9, 2023 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2023

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2023 SUNNYVALE, Calif.-(BUSINESS WIRE)-August 9, 2023-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal fourth quarter and the fiscal year ended June 30, 2023. The results for the fiscal fourth quarter ended June 30

August 9, 2023 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2023 August 9, 2023

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2023 August 9, 2023 Yujia Zhai Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2023 fourth quarter and fiscal year-end financial results. I am Yujia Zhai, Investor Relations repre

August 9, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 9, 2023 Alpha and Omega Se

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

May 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and

May 8, 2023 EX-10.2

Chief Executive Officer Employment Agreement

Exhibit 10.2 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the “Agreement”) is made and entered into effective as of the 23rd day of February, 2023 by and between Alpha and Omega Semiconductor Limited, a company incorporated and existing under the laws of the Islands of Bermuda (the “Company”), and Stephen C. Chang (the “Executive”). WHEREAS, the Executive is currently serving as the Company’s P

May 8, 2023 EX-10.1

Chairman Employment Agreement

Exhibit 10.1 EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT (the “Agreement”) is made and entered into effective as of the 23rd day of February, 2023 by and between Alpha and Omega Semiconductor Limited, a company incorporated and existing under the laws of the Islands of Bermuda (the “Company”), and Mike F. Chang (the “Executive”). WHEREAS, the Executive is currently serving as the Company’s Chie

May 4, 2023 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2023 Ended March 31, 2023

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2023 Ended March 31, 2023 SUNNYVALE, Calif.-(BUSINESS WIRE)-May 4, 2023-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal third quarter of 2023 ended March 31, 2023. The results for the fiscal third quarter of 2023 ended March 31, 2023 were

May 4, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 4, 2023 Alpha and Omega Semic

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

May 4, 2023 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended March 31, 2023 May 4, 2023

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended March 31, 2023 May 4, 2023 Yujia Zhai Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2023 third quarter financial results. I am Yujia Zhai, Investor Relations representative for AOS. With me today are Stephen Chang, o

March 2, 2023 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter)

OMB APPROVAL OMB Number: 3235-0697 Expires: June 30, 2021 Estimated average burden hours per response.

February 24, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 23, 2023 Alpha and Omega

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 23, 2023 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporati

February 14, 2023 CORRESP

February 14, 2023

Morgan, Lewis & Bockius LLP 1400 Page Mill Road Palo Alto, CA 94304 Tel. +1.650.843.4000 Fax: +1.650.843.4001 www.morganlewis.com Albert Lung Partner +1.650.843.7263 [email protected] February 14, 2023 VIA EDGAR AS CORRESPONDENCE Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, NE Mail Stop 3233 Washington, D.C. 20549 Attention: And

February 10, 2023 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6 )* Alpha & Omega Semiconductor Ltd (Name of Issuer) Common Stock (Title of Class of Securities) G6331P104 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to w

February 9, 2023 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd / Chang Mike F - SC 13G/A MIKE CHANG 2022 Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) AND (c) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(b) (Amendment No. 5)* Alpha and Omega Semiconductor Limited (Name of Issuer) Common Shares, $0.002 par value per share (Title of Class of Securities) G6331P104 (CUSIP Number) December

February 9, 2023 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv0214-alphaomegasemiconduct.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1)* Name of issuer: Alpha & Omega Semiconductor Ltd. Title of Class of Securities: Common Stock CUSIP Number: G6331P104 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropria

February 8, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha a

February 8, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 CALCULATION OF FILLING FEE TABLES Form S-8 (Form Type) ALPHA AND OMEGA SEMICONDUCTOR LIMITED (Exact Name of Registrant as Specified in Its Charter) Table 1 – Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price per Unit (2) Maximum Aggregate Offering Price Fee Rate Amount Registration Fee Equity Common Shares, $0.

February 8, 2023 S-8

As filed with the Securities and Exchange Commission on February 8, 2023

As filed with the Securities and Exchange Commission on February 8, 2023 Registration No.

February 6, 2023 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2023 Ended December 31, 2022

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2023 Ended December 31, 2022 SUNNYVALE, Calif.-(BUSINESS WIRE)-February 6, 2023-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal second quarter of 2023 ended December 31, 2022. The results for the fiscal second quarter of 2023 ended Decem

February 6, 2023 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended December 31, 2022 February 6, 2023

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended December 31, 2022 February 6, 2023 Yujia Zhai Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2023 second quarter financial results. I am Yujia Zhai, Investor Relations representative for AOS. With me today are Dr. Mik

February 6, 2023 8-K

Results of Operations and Financial Condition

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

December 8, 2022 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 6, 2022 Alpha and Omega

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): December 6, 2022 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporatio

December 8, 2022 EX-99.1

Alpha and Omega Semiconductor Announces Executive Leadership Transition Dr. Mike Chang to transition to Executive Chairman and Mr. Stephen Chang to become Chief Executive Officer

Exhibit 99.1 Alpha and Omega Semiconductor Announces Executive Leadership Transition Dr. Mike Chang to transition to Executive Chairman and Mr. Stephen Chang to become Chief Executive Officer December 7, 2022 SUNNYVALE, Calif.-(BUSINESS WIRE)- Alpha and Omega Semiconductor Limited (“AOS”) (Nasdaq: AOSL) today announced that its Board of Directors approved a leadership transition plan in which Dr.

December 1, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 29, 2022 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporati

November 7, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha

November 3, 2022 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2023 Ended September 30, 2022

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2023 Ended September 30, 2022 SUNNYVALE, Calif.-(BUSINESS WIRE)-November 3, 2022-Alpha and Omega Semiconductor Limited (?AOS?) (NASDAQ: AOSL) today reported financial results for the fiscal first quarter of 2023 ended September 30, 2022. The results for the fiscal first quarter of 2023 ended Septem

November 3, 2022 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 3, 2022 Alpha and Omega

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 3, 2022 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended September 30, 2022 November 3, 2022

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended September 30, 2022 November 3, 2022 Yujia Zhai Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor?s conference call to discuss fiscal 2023 first quarter financial results. I am Yujia Zhai, Investor Relations representative for AOS. With me today are Dr. Mik

October 13, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

October 11, 2022 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): October 5, 2022 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporation

October 11, 2022 EX-16.1

Letter from BDO USA LLP to the Securities and Exchange Commission.

BDO USA, LLP, a Delaware limited liability partnership, is the U.S. member of BDO International Limited, a UK company limited by guarantee, and forms part of the international BDO network of independent member firms. BDO is the brand name for the BDO network and for each of the BDO Member Firms. 300 Park Avenue, Suite 900 San Jose, CA 95110 Tel: 408-278-0220 Fax: 408-278-0230 www.bdo.com October 1

September 20, 2022 EX-99.1

Chongqing Alpha and Omega Semiconductor Limited Report of Independent Auditor

Exhibit 99.1 Chongqing Alpha and Omega Semiconductor Limited Index to Financial Statements Page Report of Independent Auditor F-2 Balance Sheet as of December 31, 2021 F-4 Statement of Operations for the Period from December 1, 2021 through December 31, 2021 F-5 Statement of Equity for the Period from December 1, 2021 through December 31, 2021 F-6 Statement of Cash Flows for the Period from Decemb

September 20, 2022 EX-21.1

List of Subsidiaries of the Registrant

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT Subsidiary Name Incorporated Location Percentage Owned Alpha and Omega Semiconductor Incorporated California, United States 100% owned by AOS Alpha and Omega Semiconductor (Cayman) Ltd. Cayman 100% owned by AOS Alpha and Omega Semiconductor (Shanghai) Co., Ltd. China 100% owned by AOS Alpha & Omega Semiconductor (Shenzhen) Limited China 100% owned by AOS

September 20, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and Omega Sem

September 20, 2022 EX-10.54

from Annual Report on Form 10-K (File No. 001-34717) filed with the Commission on September 20, 2022)

Exhibit 10.54 [*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY BRACKETS, HAS BEEN OMITTED BECAUSE IT IS BOTH (I) NOT MATERIAL AND (II) WOULD BE COMPETITIVELY HARMFUL IF PUBLICLY DISCLOSED. SHAREHOLDERS CONTRACT OF CHONGQING ALPHA AND OMEGA SEMICONDUCTOR LIMITED Article 1 General Provisions This Shareholders Contract (this ?Contract?) is entered into in Chongqing on July

August 30, 2022 NT 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING OMB APPROVAL OMB Number: 3235-0058 Expires: April 30, 2025 Estimated average burden hours per response ............ 2.50 SEC File Number: 001-34717 CUSIP Number: G6331P104 (Check one): ? Form 10-K ? Form 20-F ? Form 11-K ? Form 10-Q ? Form 10-D ? Form N-CEN ? Form N-CSR For Period Ended:

August 10, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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August 10, 2022 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended and Fiscal Year Ended June 30, 2022 August 10, 2022

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended and Fiscal Year Ended June 30, 2022 August 10, 2022 Gary Dvorchak (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor?s conference call to discuss fiscal 2022 fourth quarter financial results. I am Gary Dvorchak, Investor Relations representative

August 10, 2022 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2022

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2022 SUNNYVALE, Calif.-(BUSINESS WIRE)-August 10, 2022-Alpha and Omega Semiconductor Limited (?AOS?) (NASDAQ: AOSL), today reported financial results for the fiscal fourth quarter and the fiscal year ended June 30, 2022. The results for the fiscal fourth quarter ended June

May 10, 2022 EX-10.2

Fifth Addendum to Foundry Agreement dated as of July 28, 2005 between the Registrant and Shanghai Hua Hong NEC Electronics Company, Limited

May 10, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and

May 10, 2022 EX-10.1

(incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q (File No. 001-34717) filed with the Commission on May 10, 2022)

May 5, 2022 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2022 Ended March 31, 2022

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2022 Ended March 31, 2022 SUNNYVALE, Calif.-(BUSINESS WIRE)-May 5, 2022-Alpha and Omega Semiconductor Limited (?AOS?) (NASDAQ: AOSL) today reported financial results for the fiscal third quarter of 2022 ended March 31, 2022. The results for the fiscal third quarter of 2022 ended March 31, 2022 were

May 5, 2022 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended March 31, 2022 May 5, 2022

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended March 31, 2022 May 5, 2022 Gary Dvorchak (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor?s conference call to discuss fiscal 2022 third quarter financial results. I am Gary Dvorchak, Investor Relations representative for AOS. With me today ar

May 5, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 2, 2022 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter)

OMB APPROVAL OMB Number: 3235-0697 Expires: June 30, 2021 Estimated average burden hours per response.

February 28, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 24, 2022 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporati

February 11, 2022 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd / Chang Mike F - SC 13G/A MIKE CHANG 2021 Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) AND (c) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(b) (Amendment No. 5)* Alpha and Omega Semiconductor Limited (Name of Issuer) Common Shares, $0.002 par value per share (Title of Class of Securities) G6331P104 (CUSIP Number) December

February 9, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha a

February 9, 2022 SC 13G

AOSL / Alpha and Omega Semiconductor Ltd / VANGUARD GROUP INC - SCHEDULE 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: Alpha & Omega Semiconductor Ltd. Title of Class of Securities: Common Stock CUSIP Number: G6331P104 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??Rule 1

February 9, 2022 EX-10.2

The fourth Supplementary Agreement to the Joint Venture Contract on Incorporation of Chongqing Alpha and Omega Semiconductor Limited dated as of December 1, 2021 (English Translation)

English version for reference only Exhibit 10.2 [*] = Certain confidential information contained in this document, marked by brackets, has been omitted because it is both (i) not material and (ii) would be competitively harmful if publicly disclosed. The fourth Supplementary Agreement to the Joint Venture Contract on Incorporation of Chongqing Alpha and Omega Semiconductor Limited This Supplementa

February 9, 2022 EX-10.1

Equity Transfer Agreement of Chongqing Alpha and Omega Semiconductor Limited dated as of December 1, 2021 (English Translation) (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q (File No. 001-34717) filed with the Commission on February 9, 2022)

English version for reference only Exhibit 10.1 [*] = Certain confidential information contained in this document, marked by brackets, has been omitted because it is both (i) not material and (ii) would be competitively harmful if publicly disclosed. [*] (Purchaser) And Alpha & Omega Semiconductor (Shanghai) Ltd. And Agape Package Manufacturing (Shanghai) Limited (Seller) Regarding Chongqing Alpha

February 8, 2022 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5 )* Alpha & Omega Semiconductor Ltd (Name of Issuer) Common Stock (Title of Class of Securities) G6331P104 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to w

February 7, 2022 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended December 31, 2021 February 7, 2022

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended December 31, 2021 February 7, 2022 Gary Dvorchak (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor?s conference call to discuss fiscal 2022 second quarter financial results. I am Gary Dvorchak, Investor Relations representative for AOS. With me

February 7, 2022 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2022 Ended December 31, 2021

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2022 Ended December 31, 2021 SUNNYVALE, Calif.-(BUSINESS WIRE)-February 7, 2022-Alpha and Omega Semiconductor Limited (?AOS?) (NASDAQ: AOSL) today reported financial results for the fiscal second quarter of 2022 ended December 31, 2021. The results for the fiscal second quarter of 2022 ended Decem

February 7, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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January 31, 2022 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd / Gagnon Neil - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* Alpha and Omega Semiconductor Limited (Name of Issuer) Common Shares, $0.002 par value per share (Title of Class of Securities) G6331P104 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box t

January 27, 2022 8-K

Other Events

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

December 7, 2021 EX-99.1

ALPHA AND OMEGA SEMICONDUCTOR LIMITED UNAUDITED PRO FORMA CONSOLIDATED CONDENSED FINANCIAL INFORMATION

EX-99.1 2 a52546139ex991.htm EXHIBIT 99.1 Exhibit 99.1 ALPHA AND OMEGA SEMICONDUCTOR LIMITED UNAUDITED PRO FORMA CONSOLIDATED CONDENSED FINANCIAL INFORMATION (Unaudited) On December 1, 2021 (the “Effective Date”), Alpha & Omega Semiconductor (Shanghai) Ltd. (“AOS SH”) and Agape Package Manufacturing (Shanghai) Limited (“APM SH” and, together with AOS SH, the “Sellers”), each a wholly-owned subsidi

December 7, 2021 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

December 7, 2021 EX-99.2

AOS Announces Sale of Portion of JV Equity Interest and Financial Deconsolidation

Exhibit 99.2 AOS Announces Sale of Portion of JV Equity Interest and Financial Deconsolidation SUNNYVALE, Calif.-(BUSINESS WIRE)-December 7, 2021-Alpha and Omega Semiconductor Limited (?AOS?) (NASDAQ: AOSL) today announced a transaction related to a sale of approximately 2.1% of the outstanding equity interest in the joint venture company in Chongqing, China (the ?JV Company?) to a third party inv

November 12, 2021 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 11, 2021 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporati

November 12, 2021 S-8

As filed with the Securities and Exchange Commission on November 12, 2021

As filed with the Securities and Exchange Commission on November 12, 2021 Registration No.

November 5, 2021 EX-10.1

Amended and Restated Director Compensation Policy (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q (File No. 001-34717) filed with the Commission on November 5, 2021)

Exhibit 10.1 ALPHA AND OMEGA SEMICONDUCTOR LIMITED AMENDED AND RESTATED NON-EMPLOYEE DIRECTOR COMPENSATION POLICY This sets forth the Amended and Restated Non-employee Director Compensation Policy (the ?Policy?) of Alpha and Omega Semiconductor Limited (the ?Company?), as adopted by the Board of Directors of the Company (the ?Board?), which shall remain in effect until amended, replaced or rescind

November 5, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha

November 4, 2021 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended September 30, 2021 November 4, 2021

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended September 30, 2021 November 4, 2021 Gary Dvorchak (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor?s conference call to discuss fiscal 2022 first quarter financial results. I am Gary Dvorchak, Investor Relations representative for AOS. With me

November 4, 2021 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2021 Alpha and Omega

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November 4, 2021 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2022 Ended September 30, 2021

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2022 Ended September 30, 2021 SUNNYVALE, Calif.-(BUSINESS WIRE)-November 4, 2021-Alpha and Omega Semiconductor Limited (?AOS?) (NASDAQ: AOSL) today reported financial results for the fiscal first quarter of 2022 ended September 30, 2021. The results for the fiscal first quarter of 2022 ended Septem

November 4, 2021 EX-99.1

Press Release dated November 4, 2021

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2022 Ended September 30, 2021 SUNNYVALE, Calif.-(BUSINESS WIRE)-November 4, 2021-Alpha and Omega Semiconductor Limited (?AOS?) (NASDAQ: AOSL) today reported financial results for the fiscal first quarter of 2022 ended September 30, 2021. The results for the fiscal first quarter of 2022 ended Septem

November 4, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Results of Operations and Financial Condition

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 4, 2021 EX-99.2

Script of Prepared Remarks for Earnings Call

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended September 30, 2021 November 4, 2021 Gary Dvorchak (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor?s conference call to discuss fiscal 2022 first quarter financial results. I am Gary Dvorchak, Investor Relations representative for AOS. With me

October 25, 2021 DEFA14A

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State

October 1, 2021 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

August 30, 2021 EX-10.44

First Amendment to CEO Employment Agreement between Dr. Mike Chang and Alpha and Omega Semiconductor Limited

Exhibit 10.44 FIRST AMENDMENT TO EMPLOYMENT AGREEMENT THIS FIRST AMENDMENT (the ?Amendment?), effective as of May 6, 2021, is made by and between Alpha and Omega Semiconductor Limited, a company incorporated and existing under the laws of the Islands of Bermuda (the ?Company?), and Mike F. Chang (the ?Executive?). WITNESSETH: WHEREAS, the Executive and the Employee have entered into an and restate

August 30, 2021 EX-10.45

2021 Officer Form Retention Agreement for Executive Officers of Alpha and Omega Semiconductor Limited

EX-10.45 3 aoslex1045fy20212021office.htm EX-10.45 Exhibit 10.45 [EXECUTIVE OFFICER] c/o Alpha and Omega Semiconductor Incorporated 475 Oakmead Parkway Sunnyvale, CA 94085 [DATE] Dear [EXECUTIVE OFFICER]: We are pleased to inform you that the Company’s Board of Directors has approved a new severance benefit program for you. The purpose of this letter agreement (this “Agreement”) is to set forth th

August 30, 2021 EX-10.46

Amended and Restated Non-Employee Director Compensation Policy

Exhibit 10.46 ALPHA AND OMEGA SEMICONDUCTOR LIMITED AMENDED AND RESTATED NON-EMPLOYEE DIRECTOR COMPENSATION POLICY This sets forth the Amended and Restated Non-employee Director Compensation Policy (the ?Policy?) of Alpha and Omega Semiconductor Limited (the ?Company?), as adopted by the Board of Directors of the Company (the ?Board?), which shall remain in effect until amended, replaced or rescin

August 30, 2021 EX-21.1

List of Subsidiaries of the Registrant

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT Subsidiary Name Incorporated Location Percentage Owned Alpha and Omega Semiconductor Incorporated California, United States 100% owned by AOS Alpha and Omega Semiconductor (Cayman) Ltd. Cayman 100% owned by AOS Alpha and Omega Semiconductor (Shanghai) Co., Ltd. China 100% owned by AOS Alpha & Omega Semiconductor (Shenzhen) Limited China 100% owned by AOS

August 30, 2021 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended June 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and Omega Sem

August 30, 2021 EX-10.47

Second Amendment To Lease US Sunnyvale Office (incorporated by reference to Exhibit 10.47 from Annual Report on Form 10-K (File No. 001-34717) filed with the Commission on August 30, 2021)

{2181-00922/00973189;} 1 SECOND AMENDMENT TO LEASE This SECOND AMENDMENT TO LEASE (?Amendment?) is made this 30th day of January, 2020 (the ?Effective Date?), by and between ECI FIVE 475 OAKMEAD LLC, a Delaware limited liability company (?Landlord?), and ALPHA AND OMEGA SEMICONDUCTOR INCORPORATED, a California corporation (?Tenant?).

August 30, 2021 EX-10.48

Third Amendment To Lease US Sunnyvale Office

August 13, 2021 EX-99.1

Alpha and Omega Semiconductor Announces Appointment of Chief Operating Officer

Exhibit 99.1 Alpha and Omega Semiconductor Announces Appointment of Chief Operating Officer SUNNYVALE, Calif.,-(BUSINESS WIRE)-August 13, 2021-Alpha and Omega Semiconductor Limited ("AOS") (Nasdaq: AOSL) today announced that its Board of Directors has appointed and promoted Dr. Wenjun Li, currently Executive Vice President of World-Wide Manufacturing, to be the Chief Operating Officer of AOS, effe

August 13, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

August 11, 2021 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2021

EX-99.1 2 a52474977ex991.htm EXHIBIT 99.1 Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2021 SUNNYVALE, Calif.-(BUSINESS WIRE)-August 11, 2021-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal fourth quarter and the fiscal year ended June 30, 2021. The results

August 11, 2021 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter and Fiscal Year Ended June 30, 2021 August 11, 2021

EX-99.2 3 a52474977ex992.htm EXHIBIT 99.2 Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter and Fiscal Year Ended June 30, 2021 August 11, 2021 Gary Dvorchak (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2021 fourth quarter and year-end financial results. I am

August 11, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

June 8, 2021 EX-99.1

Alpha and Omega Semiconductor Announces New Director Nominees

Exhibit 99.1 Alpha and Omega Semiconductor Announces New Director Nominees SUNNYVALE, Calif.-(BUSINESS WIRE)-June 8, 2021-Alpha and Omega Semiconductor Limited (?AOS? or the ?Company?) (NASDAQ: AOSL), today announced that its Board of Directors, upon recommendation by the Nominating and Corporate Governance Committee, intends to nominate Hanqing (Helen) Li and So-Yeon Jeong as directors to be elec

June 8, 2021 8-K

Financial Statements and Exhibits, Other Events

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

May 7, 2021 EX-10.1

Alpha and Omega Semiconductor Limited Calendar Year 2021 Executive Incentive Cash Bonus Plan (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q (File No. 001-34717) filed with the Commission on May 7, 2021)

Exhibit 10.1 ALPHA AND OMEGA SEMICONDUCTOR LIMITED CALENDAR YEAR 2021 EXECUTIVE INCENTIVE CASH BONUS PLAN The following is a summary of the operation of the Executive Incentive Cash Bonus Plan (the ?Plan?) established by Alpha and Omega Semiconductor Limited (the ?Company?) for the calendar year commencing January 1, 2021. Participants Executive officers and Vice Presidents. Performance Bonus Part

May 7, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and

May 5, 2021 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Fiscal Quarter Ended March 31, 2021 May 5, 2021

EX-99.2 3 a52423343ex992.htm EXHIBIT 99.2 Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Fiscal Quarter Ended March 31, 2021 May 5, 2021 Gary Dvorchak (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2021 third quarter financial results. I am Gary Dvorchak, Investor R

May 5, 2021 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2021 Ended March 31, 2021

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2021 Ended March 31, 2021 SUNNYVALE, Calif.-(BUSINESS WIRE)-May 5, 2021-Alpha and Omega Semiconductor Limited (?AOS?) (NASDAQ: AOSL) today reported financial results for the fiscal third quarter of 2021 ended March 31, 2021. The results for the fiscal third quarter of 2021 ended March 31, 2021 were

May 5, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 31, 2021 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter)

OMB APPROVAL OMB Number: 3235-0697 Expires: June 30, 2019 Estimated average burden hours per response.

March 2, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 25, 2021 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporati

February 12, 2021 SC 13G/A

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4 )* Alpha & Omega Semiconductor Ltd (Name of Issuer) Common Stock (Title of Class of Securities) G6331P104 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to w

February 11, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) AND (c) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(b) (Amendment No. 5)* Alpha and Om

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) AND (c) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(b) (Amendment No. 5)* Alpha and Omega Semiconductor Limited (Name of Issuer) Common Shares, $0.002 par value per share (Title of Class of Securities) G6331P104 (CUSIP Number) December

February 9, 2021 SC 13G/A

SIGNATURE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* Alpha and Omega Semiconductor Limited (Name of Issuer) Common Shares, $0.002 par value per share (Title of Class of Securities) G6331P104 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box t

February 8, 2021 EX-10.2

Letter Agreement of Severance Benefit Program for Yueh-Se Ho, dated April 28, 2010

EX-10.2 3 a102yueh-seho.htm EX-10.2 DB2/21688780.1 ALPHA AND OMEGA SEMICONDUCTOR LIMITED Exhibit 10.2 April 28, 2010 Dr. Yueh-Se Ho c/o Alpha and Omega Semiconductor Incorporated 475 Oakmead Parkway Sunnyvale, California 94085 Dear Yueh-Se: We are pleased to inform you that the Company's Board of Directors has approved a new severance benefit program for you. The purpose of this letter agreement i

February 8, 2021 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha a

February 8, 2021 EX-10.1

Letter Agreement of Severance Benefit Program for Yifan Liang, dated April 28, 2010 (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q (File No. 001-34717) filed with the Commission on February 8, 2021)

EX-10.1 2 a101yifanliang.htm EX-10.1 DB2/21688765.1 ALPHA AND OMEGA SEMICONDUCTOR LIMITED Exhibit 10.1 April 28, 2010 Mr. Yifan Liang c/o Alpha and Omega Semiconductor Incorporated 475 Oakmead Parkway Sunnyvale, California 94085 Dear Yifan: We are pleased to inform you that the Company's Board of Directors has approved a new severance benefit program for you. The purpose of this letter agreement i

February 5, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 3, 2021 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporatio

February 4, 2021 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Fiscal Quarter Ended December 31, 2020

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Fiscal Quarter Ended December 31, 2020 February 4, 2021 Gary Dvorchak (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2021 second quarter financial results. I am Gary Dvorchak, Investor Relations representative for AOS.

February 4, 2021 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2021 Ended December 31, 2020

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2021 Ended December 31, 2020 SUNNYVALE, Calif.-(BUSINESS WIRE)-February 4, 2021-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal second quarter of 2021 ended December 31, 2020. The results for the fiscal second quarter of 2021 ended Decem

February 4, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 16, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 12, 2020 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporati

November 16, 2020 EX-99.1

Alpha and Omega Semiconductor Announces Appointment of President and Retirement of Chief Operating Officer

Exhibit 99.1 Alpha and Omega Semiconductor Announces Appointment of President and Retirement of Chief Operating Officer SUNNYVALE, Calif., November 13, 2020 (BUSINESS WIRE) - Alpha and Omega Semiconductor Limited ("AOS") (Nasdaq: AOSL) today announced that its Board of Directors has appointed and promoted Stephen Chang, currently Executive Vice President of Product Line Management, to be the Presi

November 6, 2020 EX-10.1

Amendment to Market Performance Restricted Share Unit Agreement (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q (File No. 001-34717) filed with the Commission on November 6, 2020)

EX-10.1 2 ex101-alphaomegaxmrsua.htm EXHIBIT 10.1 Exhibit 10.1 AMENDMENT TO MARKET PERFORMANCE RESTRICTED SHARE UNIT AGREEMENT This Amendment (the “Amendment”), effective as of , 2020, is entered into by and between (“Participant”) and Alpha and Omega Semiconductor Limited, an exempt liability company organized under the laws of Bermuda (the “Company”). All capitalized terms not defined herein sha

November 6, 2020 EX-10.2

Supplemental Agreement to Financing Lease Contract, dated August 3, 2020 between YinHai Leasing Company and Chongqing Alpha and Omega Semiconductor Technology Co., Ltd (English Translation) (incorporated by reference to Exhibit 10.2 to the Quarterly Report on Form 10-Q (File No. 001-34717) filed with the Commission on November 6, 2020)

Exhibit 10.2 Supplemental Agreement Party A (the Lessor): Chongqing Yinhai Financial Leasing Co., Ltd. Legal Representative: Pang Xianwei Registered Office: No. 56, Middle of Huangshan Avenue, Yubei District, Chongqing Party B (the Lessee): Chongqing Alpha and Omega Semiconductor Technology Co., Ltd. Legal Representative: MIKE FUSHING CHANG Registered Office: No. 288, Yuefu Avenue, Beibei District

November 6, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha an

November 5, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - ALPHA AND OMEGA SEMICONDUCTOR LIMITED 8-K

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 5, 2020 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended September 30, 2020 November 5, 2020

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended September 30, 2020 November 5, 2020 Gary Dvorchak (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2021 first quarter financial results. I am Gary Dvorchak, Investor Relations representative for AOS. With me

November 5, 2020 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2021 Ended September 30, 2020

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2021 Ended September 30, 2020 SUNNYVALE, Calif.-(BUSINESS WIRE)-November 5, 2020-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal first quarter of 2021 ended September 30, 2020. The results for the fiscal first quarter of 2021 ended Septem

October 13, 2020 DEFA14A

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

October 5, 2020 EX-99.1

Alpha and Omega Semiconductor Announces Updated Financial Guidance

EX-99.1 2 a52300131ex991.htm EXHIBIT 99.1 Exhibit 99.1 Alpha and Omega Semiconductor Announces Updated Financial Guidance - September Quarter Results to Exceed Guidance and Consensus - - Several End Markets Seeing Accelerated Demand - SUNNYVALE, Calif.-(BUSINESS WIRE)-October 5, 2020-Alpha and Omega Semiconductor Limited ("AOS") (Nasdaq: AOSL) today announced that it is updating its financial guid

October 5, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - ALPHA AND OMEGA SEMICONDUCTOR LIMITED 8-K

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

September 28, 2020 DEFA14A

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

September 28, 2020 DEF 14A

- DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

September 18, 2020 PRE 14A

- PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: x Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

September 2, 2020 10-K

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) ☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended June 30, 2020 OR ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and Omega Semic

September 2, 2020 EX-10.44

incorporated by reference to Exhibit 10.44 from Annual Report on Form 10-K (File No. 001-34717) filed with the Commission on September 2, 2020)

Exhibit 10.44 Supplemental Agreement (Contract No.: Jin Chu Yin Yu Zu Bao Zi (2018) No. 004 BC) This Supplemental Agreement (hereinafter referred to as the “Supplemental Agreement”) is entered into by and among the following parties on June 28, 2020. Applicant: Chongqing Yinhai Financial Leasing Co., Ltd. (hereinafter referred to as the “Applicant”) Legal Representative: Pang Xianwei Registered Of

September 2, 2020 EX-21.1

List of Subsidiaries of the Registrant

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT Subsidiary Name Incorporated Location Percentage Owned Alpha and Omega Semiconductor Incorporated California, United States 100% owned by AOS Alpha and Omega Semiconductor (Cayman) Ltd. Cayman 100% owned by AOS Alpha and Omega Semiconductor (Shanghai) Co., Ltd. China 100% owned by AOS Alpha & Omega Semiconductor (Shenzhen) Limited China 100% owned by AOS

August 17, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 12, 2020 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporation

August 11, 2020 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2020

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2020 SUNNYVALE, Calif.-(BUSINESS WIRE)-August 11, 2020-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL), today reported financial results for the fiscal fourth quarter and the fiscal year ended June 30, 2020. The results for the fiscal fourth quarter of 2020 end

August 11, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

false000138746700013874672020-05-052020-05-05 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

August 11, 2020 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter and Fiscal Year Ended June 30, 2020 August 11, 2020

EX-99.2 3 a52264501ex992.htm EXHIBIT 99.2 Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter and Fiscal Year Ended June 30, 2020 August 11, 2020 Gary Dvorchak (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2020 fourth quarter and year-end financial results. I am

June 12, 2020 SD

- SD

OMB APPROVAL OMB Number: 3235-0697 Expires: June 30, 2019 Estimated average burden hours per response.

May 11, 2020 10-Q

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) ☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and Om

May 11, 2020 EX-10.3

First Amendment to Lease dated as of December 23, 2009 between Alpha and Omega Semiconductor Incorporated and ECI Five Oakmead, LLC (incorporated by reference to Exhibit 10.3 to the Quarterly Report on Form 10-Q (File No. 001-34717) filed with the Commission on May 11, 2020)

Exhibit 10.3 FIRST AMENDMENT THIS FIRST AMENDMENT (this “Amendment”) is made and entered into as of August 28, 2019, by and between ECI FIVE OAKMEAD LLC, a Delaware limited liability company (“Landlord”), and ALPHA AND OMEGA SEMICONDUCTOR INCORPORATED, a California corporation (“Tenant”). RECITALS A. Landlord (as successor in interest to OA Oakmead II, LLC, a Delaware limited liability company) an

May 11, 2020 EX-10.1

Second Supplemental Agreement to the Joint Venture Contract on Incorporation of Chongqing Alpha and Omega Semiconductor Limited (English Translation) (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q (File No. 001-34717) filed with the Commission on May 11, 2020)

Exhibit 10.1 Second Supplemental Agreement to the Joint Venture Contract on Incorporation of Chongqing Alpha and Omega Semiconductor Limited (“Joint Venture”) This supplemental agreement (“Agreement”) is entered into by and among the following parties in Chongqing and becomes effective on July 11, 2018 (“Date of Effectiveness”): 1. Alpha and Omega Semiconductor Limited (“AOS”), a company duly inco

May 11, 2020 EX-10.2

Third Supplemental Agreement to the Joint Venture Contract on Incorporation of Chongqing Alpha and Omega Semiconductor Limited (English Translation) (incorporated by reference to Exhibit 10.2 to the Quarterly Report on Form 10-Q (File No. 001-34717) filed with the Commission on May 11, 2020)

Exhibit 10.2 Third Supplemental Agreement to the Joint Venture Contract on Incorporation of Chongqing Alpha and Omega Semiconductor Limited (“Joint Venture”) This supplemental agreement (“Agreement”) is entered into by and among the following parties in Chongqing and becomes effective on December 19, 2018 (“Date of Effectiveness”): 1. Alpha and Omega Semiconductor Limited (“AOS”), a company duly i

May 5, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 5, 2020 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporation) (C

May 5, 2020 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended March 31, 2020 May 5, 2020

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended March 31, 2020 May 5, 2020 So-Yeon Jeong (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2020 third quarter financial results. I am So-Yeon Jeong, Investor Relations representative for the company. With me

May 5, 2020 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2020 Ended March 31, 2020

EX-99.1 2 a52214770ex991.htm EXHIBIT 99.1 Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2020 Ended March 31, 2020 SUNNYVALE, Calif.-(BUSINESS WIRE)-May 5, 2020-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL) today reported financial results for the fiscal third quarter of 2020 ended March 31, 2020. The results for the fiscal third

February 26, 2020 CORRESP

AOSL / Alpha and Omega Semiconductor Ltd. CORRESP - -

Morgan, Lewis & Bockius LLP 1400 Page Mill Road Palo Alto, CA 94304 Tel. +1.650.843.4000 Fax: +1.650.843.4001 www.morganlewis.com Albert Lung 650-843-7263 [email protected] February 26, 2020 Via EDGAR Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, NE Mail Stop 3233 Washington, D.C. 20549 Attention: Andi Carpenter Anne McConnell Re

February 13, 2020 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd. / GAGNON NEIL - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 2)* Alpha and Omega Semiconductor Limited (Name of Issuer) Common Shares, $0.002 par value per share (Title of Class of Securities) G6331P104 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box

February 12, 2020 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd. / Chang Mike F - SC 13G/A 2019 MIKE Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) AND (c) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(b) (Amendment No. 5)* Alpha and Omega Semiconductor Limited (Name of Issuer) Common Shares, $0.002 par value per share (Title of Class of Securities) G6331P104 (CUSIP Number) 12/31/201

February 12, 2020 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* ALPHA & OMEGA SEMICONDUCTOR (Name of Issuer) Common Stock (Title of Class of Securities) G6331P104 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 10, 2020 10-Q

Quarterly Report - 10-Q DECEMBER 31, 2019 Q2' 2020

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha a

February 5, 2020 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended December 31, 2019 February 5, 2020

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks for the Investor Conference Call for the Quarter Ended December 31, 2019 February 5, 2020 So-Yeon Jeong (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2020 second quarter financial results. I am So-Yeon Jeong, Investor Relations representative for the company.

February 5, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 5, 2020 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporatio

February 5, 2020 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2020 Ended December 31, 2019

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2020 Ended December 31, 2019 SUNNYVALE, Calif.-(BUSINESS WIRE)-February 5, 2020-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL), today reported financial results for the fiscal second quarter of 2020 ended December 31, 2019. The results for the fiscal second quarter of 2020 ended Dece

November 12, 2019 EX-10.1

Amended and Restated 2018 Omnibus Incentive Plan (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K (File No. 001-34717) filed with the Commission on November 12, 2019)

Exhibit 10.1 ALPHA & OMEGA SEMICONDUCTOR LIMITED 2018 OMNIBUS INCENTIVE PLAN (As amended and restated effective November 7, 2019) ARTICLE I GENERAL PROVISIONS 1.1 PURPOSE OF THE PLAN This 2018 Omnibus Incentive Plan (the “Plan”) is intended to promote the interests of Alpha and Omega Semiconductor Limited, a company incorporated and existing under the laws of the Islands of Bermuda, by providing e

November 12, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 7, 2019 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporatio

November 12, 2019 10-Q

AOSL / Alpha and Omega Semiconductor Ltd. 10-Q - Quarterly Report - 10-Q Q1 2020

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha

November 4, 2019 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2020 Ended September 30, 2019

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal First Quarter of 2020 Ended September 30, 2019 SUNNYVALE, Calif.-(BUSINESS WIRE)-November 4, 2019-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL), today reported financial results for the fiscal first quarter of 2020 ended September 30, 2019. The results for the fiscal first quarter of 2020 ended Septe

November 4, 2019 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks of Investor Conference Call for the Quarter Ended September 30, 2019 November 4, 2019

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks of Investor Conference Call for the Quarter Ended September 30, 2019 November 4, 2019 So-Yeon Jeong (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2020 first quarter financial results. I am So-Yeon Jeong, Investor Relations representative for the company. With

November 4, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 4, 2019 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporatio

October 7, 2019 DEF 14A

AOSL / Alpha and Omega Semiconductor Ltd. DEF 14A - - DEF 14A 2019

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

August 23, 2019 10-K

AOSL / Alpha and Omega Semiconductor Ltd. 10-K - Annual Report - 10-K FY 2019

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (MARK ONE) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended June 30, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and Omega Sem

August 23, 2019 EX-21.1

List of Subsidiaries of the Registrant

Exhibit 21.1 SUBSIDIARIES OF THE REGISTRANT Subsidiary Name Incorporated Location Percentage Owned Alpha and Omega Semiconductor Incorporated California, United States 100% owned by AOS Alpha and Omega Semiconductor (Cayman) Ltd. Cayman 100% owned by AOS Alpha and Omega Semiconductor (Shanghai) Co., Ltd. China 100% owned by AOS Alpha & Omega Semiconductor (Shenzhen) Limited China 100% owned by AOS

August 7, 2019 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2019

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for Fiscal Fourth Quarter and Fiscal Year Ended June 30, 2019 SUNNYVALE, Calif.-(BUSINESS WIRE)-August 7, 2019-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL), today reported financial results for the fiscal fourth quarter and the fiscal year ended June 30, 2019. The results for the fiscal fourth quarter of 2019 ende

August 7, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): August 7, 2019 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporation)

August 7, 2019 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks of Investor Conference Call

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks of Investor Conference Call for the Fiscal year and Quarter Ended June 30, 2019 August 7, 2019 So-Yeon Jeong (Moderator) Good afternoon, everyone, and welcome to Alpha and Omega Semiconductor’s conference call to discuss fiscal 2019 fourth quarter and year-end financial results. I am So-Yeon Jeong, Investor Relations representativ

May 13, 2019 SD

AOSL / Alpha and Omega Semiconductor Ltd. SD SD 2018

OMB APPROVAL OMB Number: 3235-0697 Expires: June 30, 2019 Estimated average burden hours per response.

May 9, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 6, 2019 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporation) (C

May 9, 2019 EX-99.1

Alpha and Omega Semiconductor Announces New Director Nominee

Exhibit 99.1 Alpha and Omega Semiconductor Announces New Director Nominee SUNNYVALE, California, May 9, 2019 - Alpha and Omega Semiconductor Limited (“AOS” or the “Company”) (NASDAQ: AOSL), today announced that its Board of Directors intends to nominate Claudia Chen as a director to be elected at its 2019 Annual General Meeting of Shareholders in November 2019 (the “AGM”). The Company also announc

May 3, 2019 10-Q

AOSL / Alpha and Omega Semiconductor Ltd. 10-Q Quarterly Report 10-Q MARCH 31, 2019

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha and

May 2, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): May 2, 2019 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporation) (C

May 2, 2019 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks of Investor Conference Call for the Quarter Ended March 31, 2019 May 2, 2019

EX-99.2 3 a51978543ex992.htm EXHIBIT 99.2 Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks of Investor Conference Call for the Quarter Ended March 31, 2019 May 2, 2019 So-Yeon Jeong (Investor Relations) Good afternoon, everyone, and welcome to the Alpha and Omega Semiconductor’s conference call for fiscal 2019 third quarter results. This is So-Yeon Jeong, Investor Relations repr

May 2, 2019 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2019 Ended March 31, 2019

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Third Quarter of 2019 Ended March 31, 2019 SUNNYVALE, Calif.-(BUSINESS WIRE)-May 2, 2019-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL), today reported financial results for the fiscal third quarter of 2019 ended March 31, 2019. The results for the fiscal third quarter of 2019 ended March 31, 2019 wer

February 12, 2019 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd. / Chang Mike F - SC 13G/A MIKE CHANG 2018 Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) AND (c) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2(b) (Amendment No. 5)* Alpha and Omega Semiconductor Limited (Name of Issuer) Common Shares, $0.002 par value per share (Title of Class of Securities) G6331P104 (CUSIP Number) 12/31/201

February 8, 2019 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* ALPHA & OMEGA SEMICONDUCTOR (Name of Issuer) Common Stock (Title of Class of Securities) G6331P104 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 7, 2019 10-Q

AOSL / Alpha and Omega Semiconductor Ltd. 10-Q AOSL 12.31.2018 (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2018 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha a

February 6, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 6, 2019 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporatio

February 6, 2019 EX-99.1

Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2019 Ended December 31, 2018

Exhibit 99.1 Alpha and Omega Semiconductor Reports Financial Results for the Fiscal Second Quarter of 2019 Ended December 31, 2018 SUNNYVALE, Calif.-(BUSINESS WIRE)-February 6, 2019-Alpha and Omega Semiconductor Limited (“AOS”) (NASDAQ: AOSL), today reported financial results for the fiscal second quarter of 2019 ended December 31, 2018. The results for the fiscal second quarter of 2019 ended Dece

February 6, 2019 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks of Investor Conference Call for the Quarter Ended December 31, 2018 February 6, 2019

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks of Investor Conference Call for the Quarter Ended December 31, 2018 February 6, 2019 So-Yeon Jeong (Moderator) Good afternoon, everyone, and welcome to the Alpha and Omega Semiconductor’s conference call for fiscal 2019 second quarter results. This is So-Yeon Jeong, Investor Relations representative for the company. With me today

January 18, 2019 SC 13G/A

AOSL / Alpha and Omega Semiconductor Ltd. / GAGNON SECURITIES LLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Alpha and Omega Semiconductor Limited (Name of Issuer) Common Shares, $0.002 par value per share (Title of Class of Securities) G6331P104 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box

November 13, 2018 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): November 8, 2018 Alpha and Omega Semiconductor Limited (Exact name of registrant as specified in its charter) Bermuda 001-34717 77-0553536 (State or other jurisdiction of incorporatio

November 9, 2018 S-8 POS

AOSL / Alpha and Omega Semiconductor Ltd. S-8 POS 2018 (6)

As filed with the Securities and Exchange Commission on November 9, 2018 Registration No.

November 9, 2018 S-8 POS

AOSL / Alpha and Omega Semiconductor Ltd. S-8 POS 2018 (5)

As filed with the Securities and Exchange Commission on November 9, 2018 Registration No.

November 9, 2018 S-8 POS

AOSL / Alpha and Omega Semiconductor Ltd. S-8 POS 2018 (4)

As filed with the Securities and Exchange Commission on November 9, 2018 Registration No.

November 9, 2018 S-8 POS

AOSL / Alpha and Omega Semiconductor Ltd. S-8 POS 2018 (3)

As filed with the Securities and Exchange Commission on November 9, 2018 Registration No.

November 9, 2018 S-8 POS

AOSL / Alpha and Omega Semiconductor Ltd. S-8 POS 2018 #2

As filed with the Securities and Exchange Commission on November 9, 2018 Registration No.

November 9, 2018 S-8 POS

AOSL / Alpha and Omega Semiconductor Ltd. S-8 POS 2018

As filed with the Securities and Exchange Commission on November 9, 2018 Registration No.

November 9, 2018 S-8

AOSL / Alpha and Omega Semiconductor Ltd. S-8 2018

As filed with the Securities and Exchange Commission on November 9, 2018 Registration No.

November 5, 2018 10-Q

AOSL / Alpha and Omega Semiconductor Ltd. 10-Q SEP 2018 (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (MARK ONE) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2018 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE TRANSITION PERIOD FROM TO Commission file number 001-34717 Alpha

November 1, 2018 EX-99.2

Alpha and Omega Semiconductor Limited Prepared Remarks of Investor Conference Call for the Quarter Ended September 30, 2018 November 1, 2018

Exhibit 99.2 Alpha and Omega Semiconductor Limited Prepared Remarks of Investor Conference Call for the Quarter Ended September 30, 2018 November 1, 2018 So-Yeon Jeong (Moderator): Good afternoon, everyone, and welcome to the Alpha and Omega Semiconductor’s conference call for fiscal 2019 first quarter results. This is So-Yeon Jeong, Investor Relations representative for the company. With me today

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