CHUNGHWA TELECOM CO LTD

Foreign Filer Report • Dec 22, 2025

6-K 1 cht_6k_20251222.htm 6-K DFIN ActiveDisclosure (SM) HTML Document - http://www.dfinsolutions.com/ Creation Date :2025-12-22T06:17:36.5022+00:00 Copyright (c) 2025 Donnelley Financial Solutions, Inc. All Rights Reserved. 6-K

1934 Act Registration No. 1-31731

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 OF THE SECURITIES EXCHANGE ACT OF 1934

Dated December 22, 2025

Chunghwa Telecom Co., Ltd.

(Translation of Registrant’s Name into English)

21-3 Xinyi Road Sec. 1,

Taipei, Taiwan, 100 R.O.C.

(Address of Principal Executive Office)

(Indicate by check mark whether the registrant files or will file annual reports under cover of form 20-F or Form 40-F.)

Form 20-F ☒ Form 40-F ☐

(Indicate by check mark whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.)

Yes ☐ No ☒

(If “Yes” is marked, indicated below the file number assigned to the registrant in connection with Rule 12g3-2(b): Not applicable)

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EXHIBIT INDEX

Exhibit	Description
99.1	Announcement on 2025/12/18:	Change in Administration Senior Executive Vice President

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant Chunghwa Telecom Co., Ltd. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: December 22, 2025
Chunghwa Telecom Co., Ltd.
By: /s/ Wen-Hsin Hsu
Name: Wen-Hsin Hsu
Title: Chief Financial Officer

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EXHIBIT 99.1

Change in Administration Senior Executive Vice President

Date of events:2025/12/18

Contents:

1. Type of personnel changed (please enter: spokesperson, acting spokesperson, important personnel (CEO, COO, CMO, CSO, etc.), financial officer, accounting officer, corporate governance officer, chief information security officer, research and development officer, chief internal auditor, or designated and non-designated representatives): important personnel

2. Date of occurrence of the change: 2025/12/18

3. Name, title, and resume of the previous position holder: Wei-Kuo Hong, Administration Senior Executive Vice President, concurrently serving as President of Telecommunication Training Institute

4. Name, title, and resume of the new position holder: None

5. Type of the change (please enter: "resignation", "position adjustment", "retirement", "death", "new replacement" or "dismissal"): retirement

6. Reason for the change: retirement

7. Effective date: 2025/12/31

8. Any other matters that need to be specified: The vacancy of the President of Telecommunication Training Institute will be concurrently assumed by Mr. Tian-Tsair Su, President of Telecommunication Laboratories.

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