Company: AOSL
Filing Date: 2025-09-18
Form Type: DEF 14A
Source: 0001387467-25-000054
Chunk: 3

Company: ALPHA & OMEGA SEMICONDUCTOR Ltd
Filing Date: 2025-09-18
Form: DEF 14A
Chunk 3
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 Public Accounting Firm |     |    69 |
| Principal Accounting Fees and Services                                                        |     |    71 |
| Proposal No. 5: Approval of Adjournment of Annual Meeting                                     |     |    72 |
| Future Shareholder Proposals and Nominations for the 2025 Annual General Meeting              |     |    73 |
| Other Matters                                                                                 |     |    75 |
| Appendix A - 2018 Omnibus Incentive Plan                                                      |     | A - 1 |

#### Alpha and Omega Semiconductor Limited
<div align='center'>Clarendon House, 2 Church Street, Hamilton HM 11, Bermuda</div>

### PROXY STATEMENT
<div align='center'>FOR THE 2025 ANNUAL GENERAL MEETING OF SHAREHOLDERS

TO BE HELD AT 8:00 A.M. ON NOVEMBER 12, 2025 TAIWAN LOCAL TIME

(AT 4:00 P.M. ON NOVEMBER 11, 2025 U.S. PACIFIC STANDARD TIME)</div>

### INFORMATION REGARDING THE ANNUAL GENERAL MEETING

#### General
This proxy statement (“Proxy Statement”) has information about the 2025 Annual General Meeting of Shareholders (the “Annual Meeting”) and was prepared by our management for the Board of Directors (the “Board”) of Alpha and Omega Semiconductor Limited, an exempted limited liability company organized under the laws of Bermuda (“we,” “our,” “us,” or the “Company”). Our Board’s recommendation for each proposal is described in this Proxy Statement for which your vote is solicited.

In accordance with the “e-proxy” rules approved by the Securities and Exchange Commission (“SEC”) and in connection with the solicitation of proxies by the Board, on or about September 18, 2025, we will send a Notice of Internet Availability of Proxy Materials (the “Notice”) and provide access to our proxy materials (consisting of this Proxy Statement, our Annual Report on Form 10-K for the year ended June 30, 2025 and a form of proxy) over the internet to each shareholder entitled to vote at the Annual Meeting. We will not mail a full set of proxy materials to shareholders unless such shareholders request such mailing at http://www.investorvote.com/AOSL. We intend to mail to requesting shareholders full sets of our Proxy Materials (consisting of this Proxy Statement, our Annual Report on Form 10-K for the year ended June