SCHEDULE 13D/A

MILLICOM INTERNATIONAL CELLULAR SA

Common Shares · CUSIP: L6388F110

Event date: 2026-03-11

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Atlas Investissement SASReported CIK 0001952901

  Shares: 73,820,018.00 · Class: 44.1%

• Iliad Holding SAS

  Shares: 73,820,018.00 · Class: 44.1%

• Maya SAS

  Shares: 73,820,018.00 · Class: 44.1%

• Xavier Niel

  Shares: 73,820,018.00 · Class: 44.1%

• Jules Niel

  Shares: 73,820,018.00 · Class: 44.1%

• John Niel

  Shares: 73,820,018.00 · Class: 44.1%

• Elisa Niel

  Shares: 73,820,018.00 · Class: 44.1%

• Joseph Niel

  Shares: 73,820,018.00 · Class: 44.1%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.