[6-K] CHUNGHWA TELECOM CO LTD Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Chunghwa Telecom reported unaudited September 2025 results. Revenue was NT$20.19 billion, operating income NT$3.89 billion, net income attributable to stockholders of the parent NT$3.08 billion, EBITDA NT$7.23 billion, and EPS NT$0.40. For the nine months ended September 30, 2025, revenue totaled NT$170.46 billion, operating income NT$37.17 billion, net income attributable to stockholders of the parent NT$29.41 billion, EBITDA NT$67.22 billion, and EPS NT$3.79.

September net sales were NT$20,188,526 thousand vs. NT$19,486,194 thousand in 2024 (+NT$702,332, +3.60%); Jan–Sep net sales were NT$170,463,142 thousand vs. NT$164,672,680 thousand (+NT$5,790,462, +3.52%). Funds lent: 0. Endorsements/guarantees: parent 0; subsidiaries accumulated NT$500,000 thousand. Non‑trading derivatives (no hedge): unrealized -NT$27 thousand, realized -NT$1,110 thousand; hedge accounting: outstanding contracts NT$297,544 thousand, fair value NT$6,275 thousand, unrealized NT$7,048 thousand, realized -NT$5,660 thousand.

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 October 14, 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 2025/10/13:	Chunghwa Telecom announced its operating results for September 2025
99.2		Announcement on 2025/10/13:	September 2025 sales

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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: October 14, 2025

Chunghwa Telecom Co., Ltd.

By:  /s/ Wen-Hsin Hsu

Name: Wen-Hsin Hsu

Title: Chief Financial Officer

3

EXHIBIT 99.1

Chunghwa Telecom announced its operating results for September 2025

Date of events: 2025/10/13

Contents:

1.Date of occurrence of the event: 2025/10/13

2.Company name: Chunghwa Telecom Co., Ltd.

3.Relationship to the Company (please enter "head office" or "subsidiaries"): Head office

4.Reciprocal shareholding ratios: N/A

5.Cause of occurrence:

Chunghwa Telecom announced its unaudited operating results on a consolidated basis for September 2025:

The Company's revenue for September 2025 was approximately NT$20.19 billion, income from operation was approximately NT$3.89 billion, net income attributable to stockholders of the parent was approximately NT$3.08 billion, EBITDA was approximately NT$7.23 billion and earnings per share was NT$0.40.

The Company's revenue for the nine months ended September 30, 2025 was approximately NT$170.46 billion, income from operation was approximately NT$37.17 billion, net income attributable to stockholders of the parent was approximately NT$29.41 billion, EBITDA was approximately NT$67.22 billion and earnings per share was NT$3.79.

6.Countermeasures: None

7.Any other matters that need to be specified (the information disclosure also meets the requirements of Article 7, subparagraph 9 of the Securities and Exchange Act Enforcement Rules, which brings forth a significant impact on shareholders rights or the price of the securities on public companies.): None

4

EXHIBIT 99.2

Chunghwa Telecom

October 13, 2025

This is to report the changes or status of 1) Sales volume 2) Funds lent to other parties 3) Endorsements and guarantees 4) Financial derivative transactions for the period of September 2025

1) Sales volume (NT$ Thousand)

Period		Items		2025		2024		Changes		%
Sep		Net sales		20,188,526		19,486,194		(+) 702,332		(+) 3.60%
Jan-Sep		Net sales		170,463,142		164,672,680		(+) 5,790,462		(+) 3.52%

2) Funds lent to other parties (NT$ thousand)

Lending Company	Current Month	Last Month	Specified Amount
Parent Company	0	0	0
Subsidiaries	0	0	0

3) Endorsements and guarantees (NT$ thousand)

Guarantor	Increase (Decrease)	Accumulated	Limited Amount
Parent Company	0	0	0
Subsidiaries	0	500,000	3,089,721

4) Financial derivative transactions accumulated from January to the reporting month (NT$ thousand)

a-1 Non-trading purpose (that does not meet the criteria for hedge accounting)

		Forward Contract
Margins Paid		0
Premiums Received (Paid)		0
Outstanding Position	Total amount of contract	0
	Fair Value	0
	The amount of unrealized gain(loss) recognized this year	-27
Settled Position	Total amount of contract	265,092
	The amount of realized gain(loss) recognized this year	-1,110

5

a-2 Non-trading purpose (that meets the criteria for hedge accounting)

		Forward Contract
Margins Paid		0
Premiums Received (Paid)		0
Outstanding Position	Total amount of contract	297,544
	Fair Value	6,275
	The amount of unrealized gain(loss) recognized this year	7,048
Settled Position	Total amount of contract	476,849
	The amount of realized gain(loss) recognized this year	-5,660

b Trading purpose: None

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FAQ

What were CHT’s September 2025 operating results?

Revenue NT$20.19B, operating income NT$3.89B, net income attributable to stockholders of the parent NT$3.08B, EBITDA NT$7.23B, EPS NT$0.40.

What were Chunghwa Telecom (CHT) results for the nine months ended Sep 30, 2025?

Revenue NT$170.46B, operating income NT$37.17B, net income attributable to stockholders of the parent NT$29.41B, EBITDA NT$67.22B, EPS NT$3.79.

How did CHT’s net sales change year over year in September 2025?

September net sales were NT$20,188,526 thousand vs. NT$19,486,194 thousand in 2024, a change of +NT$702,332 (+3.60%).

What was CHT’s Jan–Sep 2025 net sales growth versus 2024?

Jan–Sep net sales were NT$170,463,142 thousand vs. NT$164,672,680 thousand, a change of +NT$5,790,462 (+3.52%).

Did CHT lend funds or add new guarantees in September 2025?

Funds lent: 0. Endorsements/guarantees: parent 0; subsidiaries accumulated NT$500,000 thousand.

What were CHT’s derivative positions and results in September 2025?

Non‑trading (no hedge): unrealized -NT$27 thousand, realized -NT$1,110 thousand. Hedge accounting: outstanding NT$297,544 thousand, fair value NT$6,275 thousand, unrealized NT$7,048 thousand, realized -NT$5,660 thousand.