6-K

UNITED STATES

SECURITIES ANDEXCHANGE COMMISSION

Washington, D.C.20549

FORM 6-K****

REPORTOF FOREIGN PRIVATE ISSUER

PURSUANTTO RULE 13a-16 OR 15d-16 OF THE

SECURITIESEXCHANGE ACT OF 1934

For the month of March, 2024

Commission FileNumber: 001-38763

MILLICOM INTERNATIONAL CELLULAR S.A.

(Exact Name ofRegistrant as Specified in Its Charter)

2, Rue du FortBourbon,

L-1249 Luxembourg

Grand Duchy ofLuxembourg

(Address of principalexecutive 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 March 1, 2024.

Remuneration of Directors and Executivesby distribution of Millicom (Tigo) shares

Luxembourg,March 1, 2024 – Millicom International Cellular S.A. ("Millicom") announces that, in accordance with the vesting terms and conditions of its deferred share-based compensation plans, approved at Millicom’s 2021, 2022, and 2023 annual general meetings of shareholders, it has distributed treasury shares to eligible plan participants, including 193,702 shares to its executive management.

Details of the distributions are disclosed on Millicom’s website.

For further information,please contact:

AboutMillicom

Millicom (NASDAQ U.S.: TIGO, Nasdaq Stockholm: TIGO_SDB) is a leading provider of fixed and mobile telecommunications services in Latin America. Through our TIGO® and Tigo Business® brands, we provide 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 December 31, 2023, Millicom, including its Honduras Joint Venture, employed approximately 16,500 people and provided mobile and fiber-cable services through its digital highways to more than 45 million customers, with a fiber-cable footprint over 13 million homes passed. Founded in 1990, Millicom International Cellular S.A. is headquartered in Luxembourg.

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.

Date: March 1, 2024