[6-K] MILLICOM INTERNATIONAL CELLULAR SA Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Millicom International Cellular S.A. reports that shareholders approved all resolutions at the Annual General Meeting. The AGM confirmed eight directors, re-electing María Teresa Arnal, Bruce Churchill, Blanca Treviño de Vega, Jules Niel, Pierre-Emmanuel Durand, Maxime Lombardini, Justine Dimovic, and Pierre Alain Allemand, with Lombardini continuing as Chair.

Shareholders approved the 2025 annual and consolidated accounts, allocated 2025 results to retained earnings, and authorized a USD 3 per share dividend to be paid in four equal installments around July 15, 2026, October 15, 2026, January 15, 2027, and April 15, 2027. They also granted discharge to directors, re-appointed KPMG as external auditor, approved board and auditor remuneration, and endorsed a Share Repurchase Plan.

Key Figures

Dividend per share: USD 3 per share Dividend installments: 4 equal installments Customers: More than 69 million customers +3 more

6 metrics

Dividend per share USD 3 per share Approved at AGM for year ended December 31, 2025

Dividend installments 4 equal installments Around July 15, 2026; October 15, 2026; January 15, 2027; April 15, 2027

Customers More than 69 million customers As of March 31, 2026, including Honduras JV and Chile associate

Employees Over 20,000 people As of March 31, 2026

Homes passed Over 22 million homes Fiber-cable footprint as of March 31, 2026

Number of directors 8 directors Board size set by AGM

Key Terms

Annual General Meeting, dividend distribution, Share Repurchase Plan, consolidated accounts, +1 more

5 terms

Annual General Meeting financial

"Millicom International Cellular S.A. (“Millicom”) held its Annual General Meeting (“AGM”) of shareholders today."

dividend distribution financial

"and a dividend distribution of USD 3 per share to be paid in four equal installments"

A dividend distribution is when a company gives a portion of its profits or reserves to shareholders, usually in cash or additional shares. Investors care because it provides a direct return on ownership and signals how confident management is in the company’s cash flow and long-term health; like a bakery sharing weekly tips with owners, regular or growing distributions often indicate steady earnings, while cuts can warn of trouble.

Share Repurchase Plan financial

"The Share Repurchase Plan."

A share repurchase plan is when a company uses cash to buy its own stock from the market, reducing the number of shares available to investors. This matters because fewer shares can make each remaining share represent a larger piece of ownership and boost earnings-per-share—like slicing a pizza into fewer pieces so each slice is bigger—and it can signal management thinks the stock is undervalued, though it also means cash won’t be used for other purposes.

consolidated accounts financial

"The annual accounts and the consolidated accounts for the year ended December 31, 2025."

external auditor financial

"The re-election of KPMG as the external auditor of Millicom."

An external auditor is an independent, third-party professional who reviews a company’s financial records and reports to confirm they are accurate and follow the rules. Like a home inspector checking a house before you buy, an external auditor gives investors assurance that the numbers reflect reality, which affects trust, the perceived risk of the company, and therefore investment decisions and value.

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 OF THE

SECURITIES EXCHANGE ACT OF 1934

For the month of May, 2026.

Commission File Number: 001-38763

MILLICOM INTERNATIONAL CELLULAR S.A.

(Exact Name of Registrant as Specified in Its Charter)

8400 NW 36^th Street, Suite 530

Doral, FL 33166

United States

(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 x Form 40-F ¨

MILLICOM INTERNATIONAL CELLULAR S.A.

INDEX TO FURNISHED MATERIAL

Item
______

1. Press release dated May 20, 2026.

Item 1

       

Results of the Millicom (Tigo) AGM held today

Luxembourg, May 20, 2026 – Millicom International Cellular S.A. (“Millicom”) held its Annual General Meeting (“AGM”) of shareholders today.

All of the AGM resolutions proposed by the Board of Directors were adopted by Millicom’s shareholders. The AGM set the number of directors at eight and re-elected María Teresa Arnal, Bruce Churchill, Blanca Treviño de Vega, Jules Niel, Pierre-Emmanuel Durand, Maxime Lombardini, Justine Dimovic, and Pierre Alain Allemand as Directors. Maxime Lombardini was re-elected as Chair of the Board of Directors.

All other resolutions set out in the convening notice for the AGM were also duly passed, including approval of:

(i) The annual accounts and the consolidated accounts for the year ended December 31, 2025.

(ii) The allocation of the results of the year ended December 31, 2025, to the unappropriated net profits to be carried forward; and a dividend distribution of USD 3 per share to be paid in four equal installments on or around July 15, 2026, October 15, 2026, January 15, 2027, and April 15, 2027. For more information regarding the dividend distribution, please refer to the convening notice published as Press release and available on the Millicom website.

(iii) The discharge of all the current and former Directors of Millicom who served at any point in time during the financial year ended December 31, 2025, for the performance of their mandates.  

(iv) The re-election of KPMG as the external auditor of Millicom.

(v) The remuneration to the Board and external auditor.

(vii) The Share Repurchase Plan.

The minutes of the AGM will be published as soon as these are available on the Millicom website: https://www.millicom.com/our-company/corporate-governance/shareholder-meetings/

-END-

       

For further information, please contact:

Press:	Investors:
Sofia Corral, Director Corporate Communications press@millicom.com	Luca Pfeifer, VP Investor Relations investors@millicom.com

About Millicom

Millicom (NASDAQ: TIGO) is a leading provider of fixed and mobile telecommunications services in Latin America. Through its TIGO^® and Tigo Business^® brands, the company provides a wide range of digital services and products, including TIGO Money for mobile financial services, TIGO Sports for local entertainment, TIGO ONEtv for pay TV, high-speed data, voice, and business-to-business solutions such as cloud and security. As of March 31, 2026, Millicom, including its Honduras Joint Venture and Chile associate, employed over 20,000 people and provided mobile and fiber-cable services through its digital highways to more than 69 million customers, with a fiber-cable footprint over 22 million homes passed. Founded in 1990, Millicom International Cellular S.A. is headquartered in Luxembourg with principal executive offices in Doral, Florida.

SIGNATURES

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.

	MILLICOM INTERNATIONAL CELLULAR S.A. (Registrant)
	By:	/s/ Salvador Escalón
		Name:	Salvador Escalón
		Title:	Executive Vice President, Chief Legal and Compliance Officer

Date: May 21, 2026