Atlas Investissement SAS → MILLICOM INTERNATIONAL CELLULAR SA MLCMF

Item 4 of the Schedule 13D is hereby amended and supplemented by adding the following: On August 20, 2025, Atlas Investissement entered into European-style call spread option transactions (the "Transactions") with unaffiliated third party financial institutions. The Transactions provide Atlas Investissement with economic exposure to the Common Shares between the lower strike prices and upper strike prices for each respective call thereunder, each in respect of up to 1,111,111 Common Shares, with a premium, strike price and cap price based on pre-determined formulas, which take into account each financial institution's hedging activity (such strike and cap prices, as well as other variables of the Transactions, also subject to adjustments in certain circumstances). The Transactions are exercisable in 40 separate tranches of approximately equal size, with staggered expiration dates on successive trading days (subject to market disruption). The Transactions can be settled in Common Shares or cash subject to certain conditions. The foregoing description of the Transactions is qualified in its entirety by reference to the Letter Agreements on Share Option Transaction, each of which is filed as Exhibit 25, 26 and 27, respectively, to the Schedule 13D and incorporated herein by reference.