Notification of transaction by a closely associated person of a Director of Millicom (Tigo)

Luxembourg, March 20, 2025 – Millicom International Cellular S.A. ("Millicom") announces that, on March 17, 2025, Atlas S.A.S. (”Atlas”) a person closely associated (”PCA”) with Jules Niel, a member of Millicom’s Board of Directors, informed that it acquired 344,797 Millicom Swedish Depository Receipts (SDRs) in Nasdaq Stockholm (the “Acquisition”) at an average price of SEK 299.77 per SDR.

The Acquisition by Atlas was made via a mandate given to an investment bank to purchase SDRs on behalf and for the account of the PCA, ensuring that individuals making investment decisions do not have access to material non-public information.

Mr. Jules Niel does not directly hold any Millicom shares, but he is a member of the Niel family group, which beneficially own Atlas.

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About Millicom

Millicom (NASDAQ U.S.: TIGO) 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, 2024, Millicom, including its Honduras Joint Venture, employed approximately 14,000 people, and provided mobile and fiber-cable services through its digital highways to more than 46 million customers, with a fiber-cable footprint of about 14 million homes passed. Founded in 1990, Millicom International Cellular S.A. is headquartered in Luxembourg.