Sunrise Communications AG files 6-K on Q3 2025 HoldCo IV bond report

Rhea-AI Filing Summary

Sunrise Communications AG has filed a Form 6-K to notify investors that it made available the bond report for the three months ended September 30, 2025 for its wholly owned subsidiary Sunrise HoldCo IV. The Q3 2025 bond report is accessible in the investor relations section of the company’s website at www.sunrise.ch/en/corporate/investor-relations.

Form 6-K: How Foreign Companies Report to the SEC →

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of November, 2025

Commission File Number: 001-42394

Sunrise Communications AG

(Exact name of registrant as specified in its charter)

Thurgauerstrasse 101b

8152 Glattpark (Opfikon), Switzerland

Tel: +41 58 777 76 66

(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 ☐

On November 21, 2025, Sunrise Communications AG (the “Company”) made available the bond report for the three months ended September 30, 2025 (the “Q3 2025 Bond Report”) for the Company’s wholly owned subsidiary Sunrise HoldCo IV. The Q3 2025 Bond Report can be found in the investor relations section of the Company’s website, www.sunrise.ch/en/corporate/investor-relations.

SIGNATURE

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

SUNRISE COMMUNICATIONS AG
By:		/s/ Marcel Huber
		Name:		Marcel Huber
		Title:		General Counsel and Corporate Affairs Officer of Sunrise Communications AG

Date: November 21, 2025

FAQ

What did Sunrise Communications AG (SNNRF) report in this Form 6-K?

Sunrise Communications AG reported that it has made available the Q3 2025 bond report for its wholly owned subsidiary Sunrise HoldCo IV, covering the three months ended September 30, 2025, and directed readers to its investor relations website.

Which period does the Sunrise Q3 2025 Bond Report cover?

The Q3 2025 Bond Report covers the three months ended September 30, 2025 for Sunrise HoldCo IV.

Which subsidiary’s information is included in the Q3 2025 Bond Report of Sunrise Communications AG?

The Q3 2025 Bond Report relates to Sunrise HoldCo IV, which is described as a wholly owned subsidiary of Sunrise Communications AG.

Where can investors find the Sunrise Communications AG Q3 2025 Bond Report?

The Q3 2025 Bond Report is available in the investor relations section of the company’s website at www.sunrise.ch/en/corporate/investor-relations.

What is the form type of this Sunrise Communications AG filing?

This filing is a Form 6-K, which is a report of a foreign private issuer under the Securities Exchange Act of 1934.

Who signed the Sunrise Communications AG Form 6-K related to the Q3 2025 Bond Report?

The Form 6-K was signed by Marcel Huber, who is identified as the General Counsel and Corporate Affairs Officer of Sunrise Communications AG.