Convening Notice for Annual General Meeting of Shareholders MILLICOM INTERNATIONAL CELLULAR S.A.Registered Address:148-150, Boulevard de la PétrusseL-2330, Grand Duchy of Luxembourg– R.C.S. Luxembourg: B40630 – I. NOTICE The annual general meeting (“AGM”) of the shareholders of MILLICOM INTERNATIONAL CELLULAR S.A. (“Millicom” or the “Company”) is hereby convened to be held at Luxembourg Marriott Hotel Alfa, 16, Place de la Gare, L-1616 Luxembourg on Wednesday, May 20, 2026, at 1:00 p.m. Central European Ti ...

Millicom (Tigo) publishes its 2025 Annual Report, highlighting record financial results and expanded regional footprint Luxembourg, March 24, 2026 –Millicom International Cellular S.A. (“Millicom”) today published its 2025 Annual Report, including the standalone financial statements of the Company, reflecting a historic year defined by strong performance and strategic milestones. In 2025, the Company delivered record financial results and significantly expanded its regional footprint. This reflects its lon ...

As filed with the Securities and Exchange Commission on March 24, 2026 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR For the transition period from to . OR ☐ SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of event requiring this shell company report Commission file number: 001-38763 MILLICOM INTERNATIONAL CELLULAR ...

Longleaf Partners, managed by Southeastern Asset Management, released its fourth-quarter 2025 investor letter for “Longleaf Partners Global Fund”. A copy of the letter can be downloaded here. The Fund returned 5.27% in the quarter, compared to the MSCI World’s 3.12 % and the MSCI World Value’s 3.34% return. The Fund returned 16.72% for the year, compared to 21.09% and 20.79% returns, respectively, for the indexes. 2025 was a solid year for the Fund, celebrating Southeastern's 50th anniversary and the 25th ...

Core Insights - Millicom International Cellular (TIGO) has experienced significant growth, nearly tripling in value over the past year, driven by increased cash flow generation and a series of transformational acquisitions [1] Financial Performance - The company's cash flow generation has accelerated, contributing to its strong stock performance [1] Strategic Moves - Millicom has engaged in a string of transformational acquisitions that have supported its growth trajectory [1]

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Address of principal executive of ice) 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 ¨ 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 February, 2026. Commission File Number: 001-38763 MILLICOM INTERNATIONAL CELLULAR S.A. (Exact Name of Registrant as Specifie ...

分组1 - Millicom International Cellular SA (TIGO) reported quarterly earnings of $1.5 per share, exceeding the Zacks Consensus Estimate of $1.05 per share, and showing a significant increase from $0.2 per share a year ago, resulting in an earnings surprise of +42.86% [1] - The company posted revenues of $1.65 billion for the quarter ended December 2025, surpassing the Zacks Consensus Estimate by 6.16%, and up from $1.43 billion in the same quarter last year [2] - Millicom International Cellular shares have increased approximately 20.3% since the beginning of the year, outperforming the S&P 500's gain of 1.5% [3] 分组2 - The current consensus EPS estimate for the upcoming quarter is $1.44 on revenues of $1.56 billion, and for the current fiscal year, it is $4.13 on revenues of $6.17 billion [7] - The Zacks Industry Rank for Wireless Non-US is currently in the bottom 41% of over 250 Zacks industries, indicating that the industry outlook may negatively impact stock performance [8]

Financial Data and Key Metrics Changes - The company reported service revenues of $1.55 billion for Q4 2025, an increase of 15.9% year-on-year, with organic growth of 5.2% excluding contributions from newly acquired operations in Ecuador and Uruguay [14][15] - Adjusted EBITDA for the quarter reached $778 million, representing a 25.9% year-on-year increase and an EBITDA margin of 47.1% [15][18] - Equity Free Cash Flow (EFCF) grew by $139 million or 17.9% over the last 12 months, reaching $916 million [16][24] Business Line Data and Key Metrics Changes - The mobile business generated service revenue of $954 million, with a 5.7% year-on-year growth when excluding perimeter effects [5][6] - The Postpaid customer base increased by 12.6% year-on-year, reaching 9.1 million, while the Prepaid base saw a revenue growth of 3% [6][7] - The Home business added 40,000 customers, with a 5.1% year-on-year increase, although service revenues declined marginally by 0.3% [7][8] Market Data and Key Metrics Changes - In Guatemala, Postpaid grew by 20% year-on-year, with mobile service revenue increasing by 5.9% [9] - Colombia's mobile service revenue grew by 6.9% year-on-year, with Adjusted EBITDA reaching a record margin of 44% [9][10] - Panama's Postpaid customer base expanded by 14.6% year-on-year, with mobile service revenue growing by 4.5% [10] Company Strategy and Development Direction - The company is focused on integrating newly acquired operations in Ecuador, Uruguay, and Chile, aiming for operational efficiency and market consolidation [2][11] - The strategy includes a disciplined approach to network investment and a focus on Prepaid to Postpaid migration, which is expected to enhance customer satisfaction and ARPU [5][6] - The company plans to maintain a strong balance sheet while pursuing further acquisitions in adjacent markets like Peru and Venezuela, avoiding larger markets like Brazil and Mexico [47][48] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in the long-term prospects of Chile, citing its strong macroeconomic conditions and the company's ability to stabilize operations quickly [33][34] - The company anticipates a challenging operating environment due to ongoing integrations and potential currency risks, but remains optimistic about achieving an EFCF of at least $900 million in 2026 [27][39] - Management highlighted the importance of operational excellence and disciplined financial management in navigating macro volatility in Latin America [26] Other Important Information - The company distributed $334 million to shareholders in dividends, with plans to maintain a sustainable dividend policy while managing leverage [25][66] - The company expects leverage to increase temporarily due to acquisitions but aims to bring it back down to around 2.5 by year-end 2026 [28][79] Q&A Session Summary Question: Can you provide insights on the acquisition of operations in Chile and the competitive environment? - Management highlighted Chile's strong macroeconomic conditions and the company's position as number one in Home subscribers, with plans for operational improvements to achieve EFCF neutrality [33][34] Question: What is embedded in the Equity Free Cash Flow guidance for this year? - Management indicated that the guidance includes contributions from Uruguay and Ecuador, with expectations of low to mid double-digit EFCF from these countries [36][41] Question: How sustainable are the margin increases observed? - Management attributed margin expansion to ongoing efficiency programs and top-line growth, with expectations for continued improvement in Colombia and other operations [45][46] Question: What is the appetite for acquisitions in new countries? - Management stated a focus on in-market consolidation and adjacent markets, with no immediate plans to enter larger markets like Brazil and Mexico [47][48] Question: What are the drivers behind the strong revenue growth in Guatemala? - Management credited excellent execution in migrating customers from Prepaid to Postpaid, network investments, and effective base management as key factors [62][63] Question: What are the restructuring plans for 2026? - Management indicated that restructuring costs in Uruguay and Ecuador were around $20 million in 2025, with expectations of higher costs related to the Coltel acquisition in 2026 [74][75]

Financial Data and Key Metrics Changes - The company reported service revenues of $1.55 billion for Q4 2025, a 15.9% year-on-year increase. Excluding contributions from newly acquired operations in Ecuador and Uruguay, service revenues increased 5.2% year-on-year organically [14] - Adjusted EBITDA for the quarter increased 25.9% year-on-year, reaching $778 million, representing an EBITDA margin of 47.1% [15] - Equity Free Cash Flow (EFCF) grew by $139 million or 17.9% over the last 12 months, reaching $916 million [16] Business Line Data and Key Metrics Changes - Mobile service revenue totaled $954 million, including $112 million from Ecuador and Uruguay. Excluding perimeter effects, mobile service revenue grew 5.7% year-on-year [5] - The postpaid customer base reached 9.1 million, up 12.6% year-on-year, while the prepaid base grew 3% [6] - Home service revenues declined marginally by 0.3% year-on-year, with a focus on expanding high-speed broadband [7] Market Data and Key Metrics Changes - In Guatemala, postpaid grew 20% year-on-year, with mobile service revenue increasing 5.9% [9] - Colombia's mobile service revenue increased 6.9% year-on-year, with adjusted EBITDA reaching a record quarterly margin of 44% [9] - Panama's postpaid customer base expanded 14.6% year-on-year, and mobile service revenue grew 4.5% [10] Company Strategy and Development Direction - The company aims to stabilize and integrate newly acquired businesses in Uruguay and Ecuador while expanding into Chile, its twelfth market [2] - The focus remains on operational efficiency and margin enhancement, with a disciplined approach to capital expenditure [15] - The company is pursuing in-market consolidation opportunities, particularly in Colombia and Chile, while remaining cautious about entering larger markets like Brazil and Mexico [47][48] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in the long-term prospects of Chile, citing its strong macroeconomic conditions and market position [33] - The company anticipates an Equity Free Cash Flow of at least $900 million for 2026, despite potential risks from acquisitions and market volatility [27] - Management highlighted the importance of operational excellence and disciplined financial management in navigating macroeconomic challenges [26] Other Important Information - The company has successfully integrated operations in Ecuador and Uruguay, achieving a margin improvement from around 30% to above 40% [46] - The acquisition of Coltel in Colombia is expected to bring additional restructuring costs, with a focus on returning the business to a sustainable run rate [72] Q&A Session Summary Question: Can you provide insights on the acquisition of operations in Chile and the competitive environment? - Management noted that Chile has a fragmented market but is optimistic about achieving Equity Free Cash Flow neutrality this year through effective execution of their playbook [34] Question: What is embedded in the Equity Free Cash Flow guidance for this year? - Management indicated that the guidance includes contributions from Uruguay and Ecuador, estimating low to mid double-digit EFCF from these countries [36] Question: How sustainable are the margin increases observed? - Management attributed margin expansion to ongoing efficiency programs and top-line growth, with expectations for continued improvement in Colombia and other operations [45] Question: What is the appetite for acquisitions in new countries? - The company is focused on turning around acquired businesses and is primarily looking at adjacent markets like Peru and Venezuela, while avoiding larger markets like Brazil and Mexico [47][48] Question: What are the plans for restructuring costs in 2026? - Management indicated that restructuring costs in 2026 would be primarily focused on Coltel, with expectations of a significant amount to restore the business to a run rate [72]

Safe Harbor Q4 2025 Earnings Presentation Cautionary Language Concerning Forward-Looking Statements Statements included herein that are not historical facts, including without limitation statements concerning future strategy, plans, objectives, expectations and intentions, projected financial results, liquidity, growth and prospects, are forward-looking statements. Such forward-looking statements involve a number of risks and uncertainties and are subject to change at any time. In the event such risks or un ...