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 ☒                        Form 40-F ☐

MILLICOM INTERNATIONAL CELLULAR S.A.

INDEX TO FURNISHED MATERIAL

Item
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Item 1

Millicom International Cellular S.A.

For the three-month period ended

March 31, 2026

May 12, 2026

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

Unaudited interim condensed consolidated statement of income for the three-month period ended March 31, 2026

(i) Colombia Telecomunicaciones S.A. E.S.P. ("Coltel") is fully consolidated since the acquisition of the 67.5% shareholding on February 6, 2026. Additionally, Tigo Uruguay and Tigo Ecuador are also fully consolidated as from Oct 2025, acquisition dates. As a result, numbers are not be directly comparable with March 31, 2025 figures..See note 3 for further details.

(ii) Re-presented for discontinued operations (see note 4)

The accompanying notes are an integral part of these unaudited interim condensed consolidated financial statements

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

Unaudited interim condensed consolidated statement of comprehensive income for the three-month period ended March 31, 2026

The accompanying notes are an integral part of these unaudited interim condensed consolidated financial statements

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

Unaudited interim condensed consolidated statement of financial position as at March 31, 2026

The accompanying notes are an integral part of these unaudited interim condensed consolidated financial statements

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

Unaudited interim condensed consolidated statement of financial position as at March 31, 2026 (continued)

The accompanying notes are an integral part of these unaudited interim condensed consolidated financial statements

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

Unaudited interim condensed consolidated statement of cash flows for the three-month period ended March 31, 2026

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

(i) Re-presented for discontinued operations (see note 4)

The accompanying notes are an integral part of these unaudited interim condensed consolidated financial statements

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

Unaudited interim condensed consolidated statements of changes in equity for the three-month period ended March 31, 2026

As of March 31, 2026 EPM is still a non-controlling partner in certain operations in Colombia, while La Nacion is the non-controlling partner in Coltel (See Note 3).

The accompanying notes are an integral part of these unaudited interim condensed consolidated financial statements

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

Notes to the unaudited interim condensed consolidated financial statements

1. GENERAL INFORMATION

Millicom International Cellular S.A. (the “Company” or “MIC SA”), a Luxembourg Société Anonyme, and its subsidiaries, joint ventures and associates (the “Group” or “Millicom”) is a provider of fixed and mobile services dedicated to emerging markets in Latin America. Millicom provides high speed broadband and innovation around The Digital Lifestyle® services through its principal brand, TIGO.

On May 11, 2026, the Board of Directors authorized these unaudited interim condensed consolidated financial statements for issuance.

2. SUMMARY OF ACCOUNTING POLICIES

These interim condensed consolidated financial statements of the Group are unaudited. They are presented in US dollars ($) and have been prepared in accordance with International Accounting Standard (“IAS”) 34 ‘Interim Financial Reporting’ as issued by the International Accounting Standards Board ("IASB") and as adopted by the European Union ("EU"). In the opinion of management, these unaudited interim condensed consolidated financial statements reflect all adjustments that are necessary for a proper presentation of the results for interim periods. Millicom’s operations are not affected by significant seasonal or cyclical patterns.

These unaudited interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the period ended December 31, 2025, which have been prepared in accordance with International Financial Reporting Standards ("IFRS") as issued by the IASB and in conformity with IFRS as adopted by the EU. These financial statements are prepared in accordance with consolidation and accounting policies consistent with the December 31, 2025 consolidated financial statements.

We have made rounding adjustments to reach some of the figures included in these unaudited interim condensed consolidated financial statements. Accordingly, numerical figures shown as totals in some tables may not be an arithmetic aggregation of the figures that preceded them and percentage calculations using these adjusted figures may not result in the same percentage values as are shown in these unaudited interim condensed consolidated financial statements.

Foreign currency

In accordance with the Amendments to IAS 21, 'The Effects of Changes in Foreign Exchange Rates', effective as of January 1, 2025, the Group evaluated the exchangeability of the Boliviano (BOB). Based on this evaluation, the Group determined that the BOB was not exchangeable and, accordingly, applied alternative estimated exchange rates, in compliance with the requirements of the amended standard. As of the date of the initial application of the amendment referred above, the estimated exchange rate was 11.32 BOB per U.S. dollar. In turn, the official reference exchange rate was 6.91 BOB per US dollar as of January 1, 2025.

The adoption of the Amendments to IAS 21, 'The Effects of Changes in Foreign Exchange Rates' as of January 1, 2025 resulted in a negative impact of $70 million on remeasurement of monetary and non-monetary items and a negative translation into presentation currency (USD) effect of $118 million, totaling $188 million negative effect included in a single line item, titled "Adjustment on adoption of Amendment to IAS 21", in the Group's consolidated statements of changes in equity for the three-month period ended March 31, 2025.

The following standards are effective for annual periods starting on January 1, 2027 and their potential impact on the Group consolidated financial statements is currently being assessed by management:

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

3. ACQUISITION AND DISPOSAL OF SUBSIDIARIES, JOINT VENTURES, ASSOCIATES AND OTHER NON-CONTROLLING INTERESTS

Acquisitions or disposals for the three-month period ended March 31, 2026

Colombia Acquisitions - UNE EPM remaining shares acquisition and Acquisition of Telefónica’s Controlling Stake in Colombia Telecomunicaciones S.A. E.S.P. (Coltel)

Pursuant to the announcement on July 31, 2024, Millicom and Telefonica, on March 12, 2025, have entered into a definitive agreement for the acquisition by Millicom of Telefonica’s controlling 67.5% equity stake in Coltel, subject to closing conditions including regulatory approvals. Millicom has also agreed to offer to purchase the remaining 32.5% of Coltel equity owned by La Nación and other investors at the same purchase price per share offered to Telefonica. See also Note 14: "UNE EPM remaining shares acquisition" and "Acquisition of Telefónica’s Controlling Stake in Colombia Telecomunicaciones S.A. E.S.P. (Coltel)").

On January 27, 2026, Millicom was awarded 100% of Empresas Publicas de Medellin E.S.P.'s ("EPM") remaining shares in UNE EPM Telecomunicaciones S.A. (“UNE” or “Tigo Colombia”) following a successful bid in the public auction conducted by EPM. Millicom offered COP 418,741 per share, representing a total consideration of approximately COP 2.1 trillion (approximately US$ 571 million). The transaction closed on January 29, 2026. As Millicom already controlled Tigo UNE and its subsidiaries prior to the transaction, the acquisition of EPM’s non-controlling interest was accounted for as an equity transaction within the Millicom Group. Accordingly, the consideration paid was recognized as a reduction of consolidated equity, with no impact on profit or loss, as disclosed in the 'condensed consolidated statements of changes in equity', resulting in a decrease in equity of US$ 627 million.

On February 6, 2026, Millicom closed the acquisition of Telefónica’s controlling 67.5% equity stake in Colombia Telecomunicaciones S.A. E.S.P. (“Coltel”) through a tender offer that was conducted in accordance with publicly disclosed terms, at a price of approximately US$ 214.4 million. Following the completion of the transaction, the initial accounting for the business combination remains at an early stage and, accordingly, does not include expected remeasurement of intangible assets, such as spectrum, right of use assets / lease liabilities and PP&E which are part of the joint operations with Tigo Colombia (UT/UNIRED). The provisional fair values are subject to a high degree of measurement uncertainty and might change as Millicom continues to obtain information about facts and circumstances that existed at the acquisition date. The measurement period will not exceed 12 months from the acquisition date. Any adjustments to the provisional amounts will be recognized retrospectively as if the accounting for the acquisition had been completed at the acquisition date, with a corresponding adjustment to the carrying amount of the investment. See also Note 14.

At acquisition date - February 6, 2026 Provisional fair values (100%) ($ millions)

The goodwill is attributable to the workforce and the future expected synergies and profitability of Coltel. It is currently not expected to be tax deductible. As from acquisition and for the period ended March 31, 2026, Coltel contributed $267 million of revenue and a net loss of $49 million to the Group. This net loss has been negatively impacted by approximately $65 million of recorded severance costs as Millicom carried out cost reduction projects, with a focus on efficiency after acquisition. Acquisition related costs included in the statement of income under operating expenses were approximately $16 million.

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

3. ACQUISITION AND DISPOSAL OF SUBSIDIARIES, JOINT VENTURES, ASSOCIATES AND OTHER NON-CONTROLLING INTERESTS (Continued)

Acquisition of Telefónica’s Operation in Chile Jointly with NJJ

On February 10, 2026, Millicom through a joint vehicle, Celtel Chile, S. L. (owned by Millicom Spain, S.L. at 49% and NJJ Cactus SAS at 51%), completed the acquisition of 100% of the shares of Telefónica Moviles Chile, S.A., pursuant to a Share Purchase Agreement (SPA) executed at the same date. The closing consideration was $50 million paid in cash. The SPA also provides for contingent consideration in the form of two earn-outs up to $490 million, determined by formulas and procedures set out in the SPA, without recourse to Millicom. In addition, under a Call Option Agreement signed at closing, Millicom has two 30-day windows following the fifth and sixth anniversaries of closing to acquire NJJ’s entire interest in Celtel Chile, S.L. at a price determined under the agreement’s valuation formulas; if Millicom does not exercise, NJJ obtains a subsequent 60-day option to acquire Millicom’s interest using the same pricing methodology. At inception, the call option was accounted for as a derivative instrument, and based on the valuation assumptions, its fair value was determined to be immaterial.The call option arrangements do not confer present joint control over Celtel Chile by Millicom.

Celtel and its subsidiaries meet the definition of an associate for Millicom. Millicom hence accounts them using the equity method. As of 31 March, 2026, Celtel has only recently commenced the purchase price allocation process and therefore remains at an early stage. As a result, the provisional fair values are subject to a high degree of measurement uncertainty and might change as Celtel continues to obtain information about facts and circumstances that existed at the acquisition date. The measurement period will not exceed 12 months from the acquisition date. Any adjustments to the provisional amounts will be recognized retrospectively, as if the accounting for the acquisition had been completed at the acquisition date, with a consequent adjustment to the carrying amount of the investment. See also Note 8.

Agreement to sell MFS business in Paraguay

On January 5, 2026, Tigo Paraguay signed a Share Purchase Agreement ("SPA") to sell its Mobile Finance business ("MFS") in Paraguay (Mobile Cash Paraguay S.A. and Transcom S.A.) for a base price of $10 million, net of cash and debt but including a working capital required to operate (and a potential $7 million earn-out, contingent of SPA's conditions). In March, 2026, Tigo Paraguay has gathered the non-customary regulatory approvals and though the transaction is still subject to certain additional regulatory approvals all assets and liabilities of our MFS business in Paraguay were classified as held for sale as of March 31, 2026 and their results have been removed from the results of continuing operations and are shown as a single line item on the face of the statement of comprehensive income under 'net result from discontinued operations', in accordance with IFRS 5. Comparative figures of the statement of income have been re-presented accordingly.

Acquisitions or disposals for the year ended December 31, 2025

Uruguay Acquisition ("Tigo Uruguay")

On October 7, 2025, Millicom completed the acquisition of 100% of Telefonica Moviles del Uruguay S.A. (Movistar) after final regulatory approval, for an enterprise value of $440 million. As of March 31, 2026, Millicom is still working on its purchase accounting, with no further updates to the provisional purchase price allocation reported as of December 31, 2025. The fair values of identifiable assets and liabilities are subject to further work and analysis as the Group completes its valuation procedures. Any adjustments arising during the measurement period will be recognised retrospectively as at the acquisition date, with a corresponding adjustment to goodwill. Finalization of the fair value exercise is expected to occur before Q3 2026.

Ecuador Acquisition ("Tigo Ecuador")

Millicom completed the acquisition of 100% of Telefónica’s telecommunications operations in Ecuador on October 30, 2025, after final regulatory approval, for an enterprise value of $380 million. As of March 31, 2026, Millicom is still working on its purchase accounting, with no further updates to the provisional purchase price allocation reported as of December 31, 2025. The fair values of identifiable assets and liabilities are subject to further work and analysis as the Group completes its valuation procedures. Any adjustments arising during the measurement period will be recognised retrospectively as at the acquisition date, with a corresponding adjustment to goodwill. Finalization of the fair value is expected to occur before October 29, 2026.

Lati Disposal - Lati Operations and other assets

On October 28, 2024, Millicom agreed to sell Lati International, S.A. and other assets encompassing a portfolio of more than 7,000 towers in Central America to SBA Communications Corp. We have also entered into other agreements including a 15-year leaseback for the sites, and a new build-to-suit agreement under which SBA will build up to 2,500 additional sites for Millicom in the same markets. In addition to the transactions with SBA, Millicom sold Lati Paraguay to Atis Group on June 3, 2025.

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

3. ACQUISITION AND DISPOSAL OF SUBSIDIARIES, JOINT VENTURES, ASSOCIATES AND OTHER NON-CONTROLLING INTERESTS (Continued)

As further explained in our audited consolidated financial statements for the year ended December 31, 2025, gain on sale for the year ended December 31, 2025 of $741 million has been recognized under "Sale of Lati Operations" in the consolidated statement of income for the year ended December 31, 2025, while the gain share on the sale of assets from Tigo Honduras to Lati Honduras for approximately $50 million, has been recognized under "Share of Profit in Honduras joint venture" for the year ended December 31, 2025).

Following the closings with SBA, Tigo Guatemala signed a Master Lease Agreement amendment for the use of ground space on January 22, 2026. The amendment has a 15-year term and is for a total annual lease amount of approximately $13 million (resulting in the recognition of right-of use assets and lease liabilities for $119 million, together with new equipment dismantling provisions for $20 million). Concurrently, the termination of the prior lease agreements led to the derecognition of right-of-use assets by $68 million and lease liabilities by $74 million, with the net impact of $6 million recognized in other operating income (expenses), net line during the three-month period ended March 31, 2026. In addition the derecognition of tower dismantling provisions resulted in a gain of approximately $33 million (recognized also in other operating income (expenses), net line during the three-month period ended March 31, 2026).

During the three-month period ended March 31, 2025 and as part of the other assets portfolio sale described above, Tigo Nicaragua transferred most of the towers to SBA for a total gross consideration of approximately $49 million. The tower transfer qualified as a sale under IFRS 15. Under IFRS 16, Tigo Nicaragua recognized only the gain on the portion of rights transferred, for approximately $17 million, under ‘Other operating income (expenses), net for the three-month period ended March 31, 2025’, since it continues to use a percentage of the towers economic benefit via the leaseback.

4. ASSETS HELD FOR SALE AND DISCONTINUED OPERATIONS

Agreement to sell MFS business in Paraguay

Financial information relating to discontinued operations relate to our MFS business in Paraguay (see note 3). The figures shown below are after inter-company eliminations.

The assets and liabilities reclassified to Assets and liabilities held for sale were as follows:

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

4. ASSETS HELD FOR SALE AND DISCONTINUED OPERATIONS (Continued)

Colombia

As of December 31, 2025 assets held for sale amounts to $1 million (and relate to Property, plant and equipment, net from Tigo Colombia).

5. SEGMENT INFORMATION

As further detailed in note 1, Millicom operates in a single geographical region, Latin America, and more specifically in the following countries: Guatemala, Colombia, Panama, Honduras, Paraguay, El Salvador, Bolivia, Nicaragua, Costa Rica, Uruguay, Ecuador and Chile.

As further explained in the 2025 Group's Consolidated Financial Statements, the 'Chief Operating Decision Maker ("CODM") assesses performance and allocates resources, based on individual countries, which are also operating segments under IFRS 8. Following the recent acquisition of Coltel, the CODM assesses performance and allocate resources in Colombia separately for Tigo Colombia and Coltel, which are therefore presented as separate operating segments. In addition, the Honduras joint venture is reviewed by the CODM in a manner consistent with the Group’s controlled operations and accordingly presented as a separate operating segment at 100%. In the case of the Chile associate, information on its operating results is regularly reviewed by Millicom's CODM, due to its strategic significance, primarily for the purpose of assessing the ongoing investor–investee relationship. In accordance with IFRS 8 Operating Segments, this regular review by the CODM qualifies the Chile associate as an operating segment, and it is therefore presented as a separate operating segment at 100%. The amounts of the Honduras joint venture and the Chile associate are subsequently eliminated to reconcile to the Group consolidated results, as shown in the reconciliations below.

Management evaluates performance and makes decisions about allocating resources to the Group's operating segments based on financial measures, such as revenue, including service revenue, and Adjusted EBITDA. Capital expenditures are also a significant aspect for management and in the telecommunication industry as a whole. Management believes that service revenue and Adjusted EBITDA are essential financial indicators for the CODM and investors. These measures are particularly valuable for evaluating performance over time. Management utilizes service revenue and Adjusted EBITDA when making operational decisions, allocating resources, and conducting internal comparisons against historical performance and competitor benchmarks. Additionally, these metrics provide deeper insights into the Group's operating performance. Millicom's Nomination, Talent and Compensation Committee also employs service revenue and Adjusted EBITDA when assessing employees' performance and compensation, including that of the Group's executives. A reconciliation of service revenue to revenue and Adjusted EBITDA to profit before taxes is provided below.

Following the above-mentioned changes in scope which took place during 1Q of 2026, the Group considers the following individual countries as reportable segments, with Ecuador being reported on separately to provide additional information to users of the financial statements, even though it does not meet the quantitative thresholds for reportable segments under IFRS 8. (and Bolivia no longer considered as a reportable segment following the application of IAS21 Amendments). Comparative information has been re-presented accordingly.

Revenue, Service revenue, Adjusted EBITDA, capital expenditures and other segment information for the years ended March 31, 2026, and 2025 are shown on the below:

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

5. SEGMENT INFORMATION (Continued)

(*) Re-presented for discontinued operations (see note 4).

(**) Re-presented for 'Other Segments' category, including Bolivia.

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

5. SEGMENT INFORMATION (Continued)

Reconciliation of Adjusted EBITDA for reportable segments to the Group's profit before taxes from continuing operations:

(i) The unallocated expenses are primarily related to centrally managed costs.

6. OTHER NON-OPERATING (EXPENSES) INCOME, NET

The Group’s other non-operating (expenses) income, net comprised the following:

7. SHAREHOLDER REMUNERATION POLICY AND EARNINGS PER COMMON SHARE

On November 29, 2024, Millicom's Board approved an interim dividend of $1.00 per share (or its equivalent in SEK per SDR) for approximately $172 million paid on January 10, 2025.

On 14 January, 2025, Millicom's Board announced the approval of a new shareholder remuneration policy under which it proposes to resume regular cash dividends sustaining or growing cash dividends every year while maintaining a prudent capital structure. Following the above mentioned announcements:

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

7. SHAREHOLDER REMUNERATION POLICY AND EARNINGS PER COMMON SHARE (Continued)

Earning per common share

Earnings per common share (EPS) attributable to owners of the Company are comprised as follows:

(i) For the purpose of calculating the diluted earnings per common share, the weighted average outstanding shares used for the basic earnings per common share were increased only by the portion of the shares which have a dilutive effect on the earnings per common share.

8. JOINT ARRANGEMENTS AND MAIN ASSOCIATES

Tigo Honduras

Joint ventures are businesses over which Millicom exercises joint control as decisions over the relevant activities of each, such as the ability to upstream cash from the joint ventures, require unanimous consent of shareholders. Millicom determines the existence of joint control by reference to joint venture agreements, articles of association, structures and voting protocols of the board of directors of those ventures. Our investments in joint ventures is comprised solely of Honduras.

At March 31, 2026, the equity accounted net assets of our joint venture in Honduras totaled $438 million (December 31, 2025: $385 million). These net assets do not necessarily represent statutory reserves available for distribution as these include consolidation adjustments (such as goodwill and identified assets and assumed liabilities recognized as part of the purchase accounting). Out of these net assets, $4 million (December 31, 2025: $3 million) represent statutory reserves that are unavailable to be distributed to the Group. During the three-month period ended March 31, 2026, Millicom's joint venture in Honduras repatriated cash of $34 million under different forms (March 31, 2025: $23 million).

At March 31, 2026, Millicom had $233 million payable to Honduras joint venture which were mainly comprised of advances and cash pool balances (December 31, 2025: $192 million). In addition, as of March 31, 2026, Millicom had a total receivable from Honduras joint venture of $15 million, (December 31, 2025: $19 million) mainly corresponding to other operating receivables.

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

8. JOINT ARRANGEMENTS AND MAIN ASSOCIATES (Continued)

The table below summarizes the movements for the period in respect of the Honduras joint venture's carrying value:

UNIRED and UT

A joint operation is a joint arrangement whereby the parties that have joint control of the arrangement have rights to the assets, and obligations for the liabilities, relating to the arrangement. Those parties are called joint operators. Millicom and Telefonica had joint control of UNIRED and UT until the acquisition of Coltel (date as from which the Millicom Group began consolidating UNIRED and UT in full; see Note 3 for further reference).

During the first quarter of 2025, Tigo Colombia derecognised right-of-use assets and liabilities amounting to $71 million and $104 million, respectively, in connection with lease agreements previously classified as assets held for sale in fourth quarter of 2024. These lease agreements were transferred to UNIRED, the entity that had already assumed the role of lessee under the respective contracts. The net impact of the derecognition resulted in a gain of $33 million, which was recognized in the consolidated statement of profit or loss under ‘Other operating income (expenses), net for the period ended March 31, 2025 Additionally, the Tigo Colombia terminated certain lease agreements with deferred gains of $15 million as of December 31, 2024. These gains were accelerated and recognized in full in Q1 2025 within the same line item.

Tigo Chile

As previously explained in Note 3, NJJ and Millicom, through a joint vehicle, Celtel, completed on February 10, the acquisition of Telefónica Moviles Chile, S.A. ("Tigo Chile"). Millicom has significant influence over Tigo Chile holding 49% of shareholding. The Group accounts for associates in the same way as it accounts for joint ventures, that is, using the equity method. The table below summarizes the movements for the period in respect of the Chile associate's carrying value:

In February 2026, Tigo Chile entered into a new $65 million Revolving Credit Facility ("RCF") expiring in August 2027, with margins varying based on credit ratings. As of 31 March 2026, the full balance of this RCF was available. Additionally, in March 2026, Tigo Chile repaid CLP79,290 million of its local bond series Q, at maturity.

9. PROPERTY, PLANT AND EQUIPMENT

During the period ended March 31, 2026, Millicom added property, plant and equipment for $172 million (March 31, 2025: $113 million) and received $0 million from disposal of property, plant and equipment (March 31, 2025: $65 million including $49 million from the tower sale and leaseback transaction between Tigo Nicaragua and SBA, as detailed in note 3).

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

10. INTANGIBLE ASSETS

During the period ended March 31, 2026, Millicom added intangible assets for $48 million of which $27 million related to spectrum and licenses (mostly attributable to frequency charges costs to the 700MHz and 3,500 MHz bands in Ecuador), and $21 million to additions of other intangible assets (March 31, 2025: $28 million of intangible assets out of which $9 million related to spectrum and licenses mostly attributable to the 10 MHz spectrum in the 1900 MHz band awarded to Tigo Panama; and $19 million to additions of other intangible assets). During the period ended March 31, 2026 and March 31, 2025, Millicom did not received any proceeds from disposal of intangible assets.

11. FINANCIAL OBLIGATIONS

A. Debt and financing

The most material movements in debt and financing for the period ended March 31, 2026 were as follows. When applicable, local currency amounts are translated in USD using the exchange rate at the time of occurrence.

Colombia

On March 11, 2026, Tigo Colombia executed a variable four-year term loan with Davivienda Bank, for an amount of COP 220,000 million. For the period ended March 31, 2026 , Tigo Colombia partially repurchased its UNE Bond 3 (tranche B) for COP 35,250 million originally due in May 2026.

During March 2026, Coltel executed a one year variable loan with JP Morgan for an amount of COP70,000 million.

Guatemala

On February 18, 2026 and on March 17, 2026, Tigo Guatemala executed two variable (one with a five-year term and the other with a

six-year term) bank credit loans with Banco GYT Continental and Banco Agricola Mercantil for an amount of GTQ 400 million each.

Corporate

On March 27, 2026, Millicom executed a new 8-year COP-USD linked Private Bond issuance for COP 370,000 million at fixed rate subscribed by Inter-American Development Bank (IDB) and Proparco.

B. Analysis of debt and financing by maturity

The total amount of debt and financing is repayable as follows:

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

11. FINANCIAL OBLIGATIONS (continued)

The Group’s interest and other financial expenses comprised the following:

12. FINANCIAL INSTRUMENTS

Other than the items disclosed below, the fair values of financial assets and financial liabilities approximate their carrying values as at March 31, 2026 and December 31, 2025:

(i)       Fair values are measured with reference to Level 1 (for listed bonds) or 2.

Derivative financial instruments

MIC SA entered into swap contracts in order to hedge the foreign currency risk in relation to the 2027 SEK 2.2 billion bond (approximately $252 million, using the exchange rate at the time of the issuance of this bond) issued in January 2022 with maturity date January 2027. As of March 31, 2026 Coltel has swaps contracts to hedge the foreign currency risk in relation to a $500 million bond issued in 2020 and to a $70 million bank loan raised in 2024.

In January 2023, MIC S.A. also entered into two currency swap agreements to hedge an intercompany receivable of COP 206 billion (approximately $41 million) owed by Tigo-UNE. On January 5 ,2026, the mentioned swaps expired, in accordance with their maturity dates. During the period ended March 31, 2026, Tigo Colombia and Tigo Paraguay entered into short-term forwards in order to hedge foreign currency risk of USD denominated expected obligations. As of March 31, 2026, Coltel has current and non-current non-delivery forwards in order to hedge foreign currency risk of USD denominated expected obligations.

The net fair value of the aforementioned swaps/forwards amounts to a liability of $162 million as of March 31, 2026 (December 31, 2025: a liability of $23 million).

Interest rate swaps, currency swaps and forwards are measured with reference to Level 2 of the fair value hierarchy.

There are no other derivative financial instruments with a material fair value at March 31, 2026.

13. COMMITMENTS AND CONTINGENCIES

Litigation & claims

The Group is contingently liable with respect to lawsuits, legal, regulatory, commercial and other legal risks that arise in the normal course of business. As of March 31, 2026, the total amount of claims brought against MIC SA and its subsidiaries is $188 million, (December 31, 2025: $146 million). The Group's share of the comparable exposure for its joint venture in Honduras and Chile associate is $8 million (December 31, 2025: $3 million).

As at March 31, 2026, $47 million has been provisioned by the Group for these claims and risks in the unaudited interim condensed consolidated statement of financial position (December 31, 2025: $37 million). The Group's share of provisions made by the joint venture and the associate was $5 million (December 31, 2025: $1 million). While it is not possible to ascertain the ultimate legal and financial liability with respect to these claims and risks, the ultimate outcome is not anticipated to have a material effect on the Group’s financial position and results of operations.

Unaudited Interim Condensed Consolidated Financial Statements for the three-month period ended March 31, 2026

13. COMMITMENTS AND CONTINGENCIES (continued)

Taxation

At March 31, 2026, the tax risks exposure of the Group's subsidiaries is estimated at $401 million, for which provisions of $33 million have been recorded in tax liabilities; representing management's assessment of the probable cash outflow of eventual claims and required payments related to those risks (December 31, 2025: $376 million of which provisions of $32 million were recorded). The Group's share of comparable tax exposure in its joint venture and associates amounts to $187 million (December 31, 2025: $160 million) for which provisions of $9 million (December 31, 2025: $8 million), were made.

Capital commitments

At March 31, 2026, the Group had fixed commitments to purchase network equipment, other fixed assets and intangible assets of $382 million of which $367 million are due within one year (December 31, 2025: $305 million of which $280 million are due within one year). The Group’s share of commitments in the Honduras joint venture and associate is $45 million of which $45 million are due within one year (December 31, 2025: $31 million out of which $31 million are due within one year). Additionally, the Group's share of commitments in the UNIRED joint operation was $16 million for December 31, 2025.

14. SUBSEQUENT EVENTS

Colombia - Purchase of "La Nacion" shareholding in Coltel

On April 27, 2026, Millicom completed the acquisition of the remaining 32.5% equity stake in Coltel formerly held by La Nación.

Financing

Corporate: On April 14, 2026, Millicom completed an $87.5 million aggregate principal amount reopening of its 7.375% Senior Notes due 2032 (the “Additional Notes”) in a Regulation S only private placement that is exempt from the registration requirements of the U.S. Securities Act of 1933., as amended (the “Securities Act”) to Banco General, S.A. The Additional Notes have been admitted to trading on the Luxembourg Stock Exchange Euro MTF market.

Paraguay: On April 29, 2026, Tigo Paraguay redeemed all of its 5.875% Senior Unsecured Notes due 2027 (the “Notes”) at par plus accrued and unpaid interest, for an aggregate principal amount of approximately $139.7 million.

Colombia (Coltel): On April 13, 2026, Coltel entered into a one-year new bridge facility with Banco Santander for an amount of $100 million at variable rate. Coltel used these funds to repay the $100 million facility with HSBC, with April 17, 2026 as original maturity date. Additionally, on May 7, 2026, Coltel entered into a new one-year working capital loan agreement in local currency by COP70,000 million (approximately $19 million) with JP Morgan.

Tigo Sports

On April 13, 2026, Tigo Central America and FOX Latin America announced an agreement under which FOX acquired Tigo Sports’ local sports content, a portfolio of local rights, production capabilities, and on-air talent across Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, and Panama.

Voluntary retirement and severance plans

Tigo Colombia: In April, 2026, Tigo Colombia conducted a voluntary retirement plan for its employees; severance expenses related to this plan of approximately COP95,000 million (approximately $26 million).

Tigo Chile: In April, 2026, Tigo Chile incurred in severance costs for approximately CLP19,000 million (approximately $21 million).

Item 2

Luxembourg, May 12, 2026

Millicom (Tigo) Q1 2026 Earnings Release

Q1 2026 Highlights*

*See page 12 for a description of non-IFRS measures and for reconciliations to the nearest equivalent IFRS measures.** EFCF excluding disposals.

Millicom Chief Executive Officer Marcelo Benitez commented:

“We are off to a strong start in 2026, with solid operational execution and important progress on the strategic initiatives that will shape the future of Millicom. During the quarter, we strengthened our position in Colombia through the acquisition of EPM’s 50% stake in Tigo UNE and Telefónica’s majority stake in Coltel, which we are now fully consolidating in our results. Shortly after quarter-end, we also acquired the remaining stake in Coltel from La Nación de Colombia. Together, these steps give us greater scale, stronger network assets, and a broader customer base in one of our most important markets.

Led by NJJ, we began to apply the Millicom playbook in Chile, following the acquisition of Telefónica Chile. While it is still early, the new leadership team has already taken decisive action to simplify the commercial offer, stabilize ARPU, reduce leverage, and resize the organization.

Operationally, our underlying business continues to perform well. In Mobile, our prepaid-to-postpaid migration strategy continues to gain traction, supporting ARPU growth and service revenue momentum.

Financially, Service Revenue grew 4.9% organically to USD $2 billion while Adjusted EBITDA reached $857 million, with a reported margin of 43.2%, despite initial Coltel integration and restructuring costs. Equity free cash flow was $225 million for the quarter improving $90 million year-on-year when excluding last years infrastructure sale, a strong outcome for what is typically our weakest quarter.

Overall, we are executing a clear strategy: strengthen our core markets, improve customer value, expand convergence, and maintain disciplined cash flow management.”

2026 Financial Targets

Millicom targets 2026 EFCF of at least $900 million and year-end leverage around 2.5x. These targets include restructuring costs of all acquired businesses.

Subsequent Events

Colombia - Purchase of "La Nacion" shareholding in Coltel

On April 27, 2026, Millicom completed the acquisition of the remaining 32.5% equity stake in Coltel formerly held by La Nación.

Financing

Corporate: On April 14, 2026, Millicom completed an $87.5 million aggregate principal amount reopening of its 7.375% Senior Notes due 2032 (the “Additional Notes”) in a Regulation S only private placement that is exempt from the registration requirements of the U.S. Securities Act of 1933, as amended (the “Securities Act”) to Banco General, S.A. The Additional Notes have been admitted to trading on the Luxembourg Stock Exchange Euro MTF market.

Colombia (Coltel): On April 13, 2026, Coltel entered into a one-year new bridge facility with Banco Santander for an amount of $100 million at variable rate. Coltel used these funds to repay the $100 million facility with HSBC, with April 17, 2026 as original maturity date.  Additionally, on May 7, 2026, Coltel entered into a new one-year working capital loan agreement in local currency by COP 70,000 million (approximately $19 million) with JP Morgan.

Paraguay: On April 29, 2026, Tigo Paraguay redeemed all of its 5.875% Senior Unsecured Notes due 2027 (the “Notes”) at par plus accrued and unpaid interest, for an aggregate principal amount of approximately $139.7 million.

Tigo Sports

On April 13, 2026, Tigo Central America and FOX Latin America announced an agreement under which FOX acquired Tigo Sports’ local sports content, a portfolio of local rights, production capabilities, and on-air talent across Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, and Panama.

Voluntary retirement and severance plans

Tigo Colombia: In April, 2026, Tigo Colombia conducted a voluntary retirement plan for its employees; severance expenses related to this plan of approximately COP95,000 million (approximately $26 million).

Tigo Chile: In April, 2026, Tigo Chile incurred severance costs for approximately CLP19,000 million (approximately $21 million).

Group Quarterly Financial Review - Q1 2026

Revenue increased 45.1% year-over-year in Q1 2026, primarily driven by the acquisition of Coltel in Colombia, the expansion into Ecuador and Uruguay, favorable foreign exchange movements against the U.S. dollar, mainly from Colombia, Paraguay and Bolivia,  as well as continued growth in Mobile and B2B Revenues.

Equipment, programming and other direct costs increased 52.4%, primarily driven by the Coltel acquisition and the addition of Ecuador and Uruguay, which together accounted for a $131 million increase.

Operating expenses increased 54.2% year-on-year, reflecting the integration of operations in Colombia including $65 million in related severance charges as well as the addition of Ecuador and Uruguay.

Depreciation and amortization increased 64.7% and 35.9%, respectively, reflecting mainly the Coltel acquisition in Colombia, the expansion of the consolidation perimeter in Ecuador and Uruguay, and the appreciation of local currencies.

Share of profit (loss) in joint ventures was a negative $13 million mainly reflecting our share of losses in our associate in Chile, partially offset by our share of profits in the Honduras Joint Venture.  Other operating income declined to $38 from $72 million in the year-ago quarter, mainly due to shared mobile network asset transfers in Colombia. As a result, operating profit decreased 1.2%, year-on-year to $416 million.

Net financial expenses increased $77 million year over year to $238 million, driven by higher interest and lease expenses, as a result of the expansion of the perimeter, and increased indebtedness related to recent M&A transactions.

Other non-operating expense, net, totaled $24 million, largely due to realized losses on maturing legacy instruments from the Colombia acquisition.

Net tax expense of $78 million increased year-on-year mainly due to increased profitability and last year's Lati transaction.

Non-controlling interests were a $34 million gain for Q1 2026, versus a $26 million loss in Q1 2025, reflecting our share of losses in the newly acquired Colombian operation.

As a result of the above operating performance, net profit attributable to owners of the company, was $109 million, or $0.65 per share, based on 167.25 million weighted average shares outstanding in Q1 2026. Net profit for the period includes approximately $67 million in restructuring charges related to newly acquired operations.  This compares to a net profit of $193 million or $1.14 per share based on 169.2 million weighted average shares outstanding in Q1 2025. Net Profit for Q1 2025 benefited from approximately $95 million in one time gains.

Cash Flow

* See page 12 for a description of non-IFRS measures.

Equity Free Cash Flow (EFCF) in Q1 2026 was $225 million, compared to $177 million in Q1 2025 which included a non-recurring benefit of $42 million from the infrastructure sale. The increase in EFCF over the past year is explained primarily by the following items:

Positives:

Detractors:

Debt

During Q1 2026, gross debt increased $1,739 million to $8,624 million as of March 31, 2026, compared to $6,886 million as of December 31, 2025. The increase was primarily driven by the consolidation of Coltel, which added $1,482 million of gross debt.

As of March 31, 2026, 61% of gross debt was in local currency¹, while 57% of our debt was at fixed rates² with an average maturity of 3.6 years. Approximately 71% of gross debt was held at our operating entities, while the remaining 29% was at the corporate level. The average interest rate on our debt was 7.8%. On our dollar-denominated debt³, the average interest rate was 5.6% with an average maturity of 3.9 years.

Cash was $1,177 million as of March 31, 2026, a decrease of $375 million, compared with $1,552 million as of December 31, 2025, with approximately 80% held in U.S. dollars. As a result, net debt* increased to $7,609 million as of March 31, 2026, up $2,253 million quarter-on-quarter. The increase was driven by $773 million of acquisition-related payments, including the purchase of EPM’s equity stake in Tigo Une, the acquisition of two-thirds of Coltel from Telefónica, and the joint acquisition of Telefónica Chile in partnership with NJJ.

In addition, net debt increased due to the consolidation of Coltel, which added $1,513 million net debt, a $125 million dividend payment and foreign exchange rate impacts from the appreciation of local currency denominated debt. These increases were partially offset by the EFCF generation of $225 million during the quarter. As a result, leverage* increased, ending the quarter at 2.76x, compared with 2.17x as of December 31, 2025.

* Net Debt and Leverage are non-IFRS measures. See page 12 for a description of non-IFRS measures and for reconciliations to the nearest equivalent IFRS measures.

¹ Or swapped for local currency

² Or swapped for fixed rates

³ Including SEK denominated bonds that have been swapped into US dollars.

Operating performance

The information contained herein can also be accessed electronically in the Financial & Operational Data Excel file published at www.millicom.com/investors alongside this earnings release.

Business units

We discuss our performance under two principal business units:

1. Mobile, including mobile data, mobile voice, and mobile financial services (MFS) to consumer, business and government customers;

2. Fixed and other services, including broadband, Pay TV, content, and fixed voice services for residential (Home) customers, as well as voice, data and value-added services and solutions to business and government customers.

On occasion, we also discuss our performance by customer type, with B2B referring to our business and government customers, while B2C includes residential and personal consumer groups.

Market environment

The macroeconomic environment in our markets remained relatively stable during 1Q 2026, with the Colombian Peso, Paraguayan Guarani and Bolivian Boliviano appreciating year over year 13.3%, 20.5% and 24.5% respectively against the U.S. Dollar, impacting results during the period. Foreign exchange rates and movements are presented on page 16.

Key Performance Indicators

The mobile business ended Q1 with 57.3 million customers, up 37.8% year-on-year reflecting net additions of 8.0 million during the quarter, with postpaid additions of 5.6 million customers primarily as a result of the inclusion of Coltel's operations with the addition of 8.8 million mobile customers, and 5.4 million postpaid customers. Mobile ARPU increased 13.4% year-on-year. Excluding inorganic growth net additions would have increased 827,000 customers with postpaid customers growing 1.0 million for the year, supported by our ongoing efforts to drive pre-to-postpaid migration.

At the end of Q1 2026, Millicom fixed networks passed 21.9 million homes, an increase of 8.3 million for the year. HFC and FTTH customer relationships increased 1.7 million in Q1 26 over Q1 25. HFC/FTTH revenue-generating units ("RGU") increased by 3.0 million year-on-year. These trends were mainly driven by the consolidation of Coltel. Excluding this inorganic growth HFC/ FTTH RGUs  would have declined by 80,000 for the year due to a reduction in fixed telephony connections. This decline was partially offset by an increase of 201,000 broadband internet connections.

* KPIs exclude our joint venture in Honduras, which is not consolidated in the Group figures. ARPU calculation excludes Coltel. During the two-month consolidation period, Coltel’s Mobile and Home ARPU were $6.5 and $26.2, respectively.  

Financial indicators

In Q1 2026, revenue increased 45.1% year-on-year to $1,985 million, while service revenue increased 45.2% to $1,857 million. Excluding the impact of currency movements, the in-market consolidation, organic service revenue grew 4.9% year-on-year, driven by robust growth in Mobile and B2B Service Revenue

Adjusted EBITDA was $857 million, up 35.5% year-on-year. This increase was driven by $33 million from the consolidation of Coltel, savings from our efficiency program, and the impact of M&A and restructuring-related one-offs reflected in our 2026 results. Capex was $193 million in Q1 2026, up 46.0% year over year due to the incorporation of operations in Ecuador, Uruguay and Colombia. Excluding these effects, capex increased 26.8% year over year, mainly reflecting higher capex execution in line with sales growth. As a result, Operating Cash Flow (OCF) increased 32.7% to $664 million in Q1 2026 from $501 million in Q1 2025.

            * Service revenue, Adjusted EBITDA, Adjusted EBITDA margin, Capex, OCF and organic growth are non-IFRS measures. See page 12 for a description of non-IFRS measures and for reconciliations to the nearest equivalent IFRS measures.

Country performance

Commentary in this section refers to performance measured in local currency terms, unless specified otherwise.

ESG highlights

At Millicom, we believe in the power of technology as a fundamental tool for development and equity. Through our social impact programs, we work to bring the opportunities of the digital world to underserved communities across the countries where we operate.

During Q1 2026, our flagship initiatives continued to generate meaningful impact across the region. Through Maestr@s Conectad@s, we trained 4,787 teachers, strengthening their digital and educational capabilities to support innovation in the classroom. Conectadas empowered 9,302 women through digital literacy and entrepreneurship training, helping them develop skills for personal and professional growth. At the same time, Conéctate Segur@ reached 30,319 children, parents, and educators with awareness and educational activities focused on the safe, responsible, and positive use of technology and the internet.

One of the highlights of the quarter was the continued success of Jóvenes Conectados in Paraguay. Due to the strong impact achieved during its first phase, the program launched its second generation and is expected to benefit more than 35,000 young people, continuing to provide digital and professional skills for the future workforce through a strong alliance between the Ministry of Education, private sector partners, and Tigo Paraguay.

Across all our programs, we are actively working to build strong partnerships with local governments, industry leaders, and other key stakeholders to increase our collective impact. Initiatives like Jóvenes Conectados, Maestr@s Conectad@s, Conectadas, and Conéctate Seguro are being strengthened through these alliances, allowing us to scale our efforts, share resources, and maximize success. We remain committed to expanding these collaborations to bring the benefits of the digital world to even more people across our markets.

⁴ Comprised of El Salvador, Ecuador, Nicaragua, Uruguay and Costa Rica

Video conference details

A video conference to discuss these results will take place on May 12 at 08:00 (New York) / 14:00 (Luxembourg) / 13:00 (London). Registration for the live event is required and is available at the following link. After registering, participants will receive a confirmation email containing details about joining the video conference. Alternatively, participants can join in a listen-only mode, by dialing any of the following numbers and using webinar ID number 869 6353 4578. Please dial a number based on your location:

Additional international numbers are available at the following link.

Financial calendar

2026

For further information, please contact

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.

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 uncertainties materialize, Millicom’s results could be materially adversely affected. In particular, there is uncertainty about global economic activity and inflation, the demand for Millicom's products and services, and global supply chains. The risks and uncertainties include, but are not limited to, the following:

A further list and description of risks, uncertainties and other matters can be found in Millicom’s Annual Report on Form 20-F, including those risks outlined in “Item 3. Key Information—D. Risk Factors,” and in Millicom’s subsequent U.S. Securities and Exchange Commission filings, all of which are available at www.sec.gov. All forward-looking statements attributable to us or any person acting on our behalf are expressly qualified in their entirety by this cautionary statement. Readers are cautioned not to place undue reliance on these forward-looking statements that speak only as of the date hereof. Except to the extent otherwise required by applicable law, we do not undertake any obligation to update or revise forward-looking statements, whether as a result of new information, future events or otherwise.

Non-IFRS Measures

This press release contains financial measures not prepared in accordance with IFRS. These measures are referred to as “non-IFRS” measures and include: service revenue, Adjusted EBITDA, Adjusted EBITDA Margin, Capex and Equity Free Cash Flow, among others defined below. Annual growth rates for these non-IFRS measures are often expressed in organic constant currency terms to exclude the effect of changes in foreign exchange rates, the adoption of new accounting standards, and are proforma for material changes in perimeter due to acquisitions and divestitures. The non-IFRS financial measures are presented in this press release as Millicom’s management believes they provide investors with additional information for the analysis of Millicom’s results of operations, particularly in evaluating performance from one period to another. Millicom’s management uses non-IFRS financial measures to make operating decisions, as they facilitate additional internal comparisons of Millicom’s performance to historical results and to competitors' results, and provide them to investors as a supplement to Millicom’s reported results to provide additional insight into Millicom’s operating performance. Millicom’s Compensation and Talent Committee uses certain non-IFRS measures when assessing the performance and compensation of employees, including Millicom’s executive directors.

The non-IFRS financial measures used by Millicom may be calculated differently from, and therefore may not be comparable to, similarly titled measures used by other companies - refer to the section “Non-IFRS Financial Measure Descriptions” for additional information. In addition, these non-IFRS measures should not be considered in isolation as a substitute for, or as superior to, financial measures calculated in accordance with IFRS, and Millicom’s financial results calculated in accordance with IFRS and reconciliations to those financial statements should be carefully evaluated.

Non-IFRS Financial Measure Descriptions

Service revenue is revenue related to the provision of ongoing services such as monthly subscription fees for mobile and broadband, airtime and data usage fees, interconnection fees, roaming fees, mobile finance service commissions and fees from other telecommunications services such as data services, short message services, installation fees and other value-added services excluding telephone and equipment sales.

Adjusted EBITDA is operating profit excluding impairment losses, depreciation and amortization, gains/losses on fixed asset disposals, and early termination of leases.

Adjusted EBITDA Margin represents Adjusted EBITDA in relation to revenue.

Organic growth represents year-on-year growth excluding the impact of changes in FX rates, perimeter, and accounting. Changes in perimeter are the result of acquisitions and divestitures. Results from divested assets are immediately removed from both periods, whereas the results from acquired assets are included in both periods at the beginning (January 1) of the first full calendar year of ownership.

Net debt is Debt and financial liabilities, including derivative instruments (assets and liabilities), less cash and pledged and time deposits.

Leverage is the ratio of net debt over LTM (last twelve months) Adjusted EBITDA subtracting depreciation of right-of-use assets and interest expense on leases, proforma for acquisitions made during the last twelve months.

Capex is balance sheet capital expenditure excluding spectrum and license costs and lease capitalizations.

Cash Capex represents the cash spent in relation to capital expenditure, excluding spectrum and licenses costs.

Operating Cash Flow (OCF) is Adjusted EBITDA less Capex.

Operating Free Cash Flow (OFCF) is Adjusted EBITDA, less cash capex, less spectrum paid, working capital, other non-cash items, and taxes paid.

Equity Free Cash Flow (EFCF) is OFCF less finance charges paid (net), lease interest payments, lease principal repayments, and advances for dividends to non-controlling interests, plus cash repatriation from joint ventures and associates.

Average Revenue per user per Month (ARPU) for our mobile customers is (x) the total mobile and mobile financial services revenue (excluding revenue earned from tower rentals, call center, data and mobile virtual network operator, visitor roaming, national third parties roaming and mobile telephone equipment sales revenue) for the period, divided by (y) the average number of mobile subscribers for the period, divided by (z) the number of months in the period. We define ARPU for our home customers as (x) the total home revenue (excluding equipment sales and TV advertising) for the period, divided by (y) the average number of customer relationships for the period, divided by (z) the number of months in the period. ARPU is not subject to a standard industry definition and our definition of ARPU may be different from other industry participants.

Please refer to our 2025 Annual Report for a list and description of non-IFRS measures.

Non-IFRS Reconciliations⁵

Reconciliation from Reported Growth to Organic Growth for the Group

*Organic growth calculated by re-basing all periods to the budget FX rates of the current year. This creates small differences captured in "Other".

Adjusted EBITDA reconciliation

Adjusted EBITDA margin

⁵ Except for balance sheet and cash flow items, the 2025 comparative financial information has been re-presented to reflect the classification of Tigo Paraguay’s Mobile Finance business as discontinued operations. Coltel has been fully consolidated since the acquisition of the 67.5% stake on February 6, 2026. Tigo Uruguay and Tigo Ecuador have been fully consolidated since their respective acquisition dates in October 2025.

One-off Summary - Items above Adjusted EBITDA

* Includes smaller restructuring-related items from the other countries not shown separately in these tables.

ARPU reconciliations

The above figures exclude Coltel. Coltel's Mobile ARPU during the two-month consolidation period was $6.5

* Refers to production services, MVNO, DVNO, equipment rental revenue, call center revenue, national roaming, equipment sales, visitor roaming, tower rental, DVNE, and other non-customer driven revenue.

** Average QoQ for the quarterly view is the average of the last quarter.

Beginning in Q1 2023 the calculation of Home ARPU now includes equipment rental.

The above figures exclude Coltel. Coltel's Home  ARPU during the two-month consolidation period was $26.2

* TV advertising, production services, equipment rental revenue, call center revenue, equipment sales and other non customer driven revenue.

** Represented by homes connected all technologies (HFC/FTTH + Other Technologies + DTH & Wimax RGUs).

*** Average QoQ for the quarterly view is the average of the last quarter.

OCF (Adjusted EBITDA- Capex) Reconciliation

Capex Reconciliation

Equity Free Cash Flow Reconciliation

* Equity free cash flow does not include Cash Flow from Financing Activities, such as the issuance or repurchase of shares.

Foreign Exchange rates

(i) Refer to the note 2 of the IAS 34 for details on the adoption of the amendments to IAS21.

(ii) 2025 average rate as from acquisition date.

(iii) 2026 average rate as from acquisition date. 

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: May 13, 2026