Company: DSWL
Filing Date: 2025-09-19
Form Type: 6-K
Source: 0002077096-25-000125
Chunk: 2

Company: DESWELL INDUSTRIES INC
Filing Date: 2025-09-19
Form: 6-K
Chunk 2
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.mo |     | 853-2832-3265 |     | Deswell Industries, Inc.                     
 10B, Edificio Associacao Industrial De Macau 
 No. 32-36 Rua do Comandante Mata e Oliveira  
 Macao, SAR, PRC                              |

The Company’s Annual Report on Form 20 -Ffor its fiscal year ended March 31, 2025 has been posted on, and is available from, Deswell’s website at http: // www.deswell.com /sec -filingsby selecting “Form 20 -F.” The Company’s Annual Report on Form 20 -Fand other documents filed or submitted to the SEC are also available from the SEC’s website at http: // www.sec.gov.

1

The Company will satisfy the delivery requirements for proxy and information statements with respect to two or more shareholders sharing the same address by delivering a single proxy statement or information statement to those shareholders in order to reduce the amount of duplicate information that shareholders receive and to lower printing and mailing costs, unless the Company has received contrary instructions from the affected shareholder. Additional copies may be obtained, without charge, by contacting via mail, telephone or e -maileither the Company’s: Investor Relations Representative: IMS Investor Relations
51 Locust Avenue, Ste. 300
New Canaan, CT 06840
Phone 203.972.9200
E -mail: jnesbett@imsinvestorrelations.com or Transfer Agent and Registrar: Courier Services: Computershare 150 Royal Street Canton, MA 02021 First Class: Computershare P.O BOX 43101 Providence, RI 02904 Registered/Certified Mail: Computershare 150 Royal Street Canton, MA 02021

| Shareholder Services Number:  |     | 1-800-962-4284                                    |
| Shareholder Website:          |     | www.computershare.com/investor                    |
| Shareholder Online Inquiries: |     | https://www-us.computershare.com/Investor/Contact |

In addition, proxy materials for Deswell’s 2025 annual meeting may be accessed and downloaded from the website maintained by Computershare at http: // www.edocumentview.com / DSWL.

2 QUESTIONS AND ANSWERS RELATING TO THE 2025 ANNUAL MEETING Why did I receive these materials? Our shareholders as of the close of business on September 11, 2025, which we refer to as