As of November 6, 2026, one holder's latest Schedule 13D or 13G filing report owning 5% or more of Millicom International Cellular Sa. The largest reported stake is Atlas Investissement SAS', at 49.5%. 11 filings are on record since August 13, 2025 (Schedule 13D/A, September 24, 2026).
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Key facts
- · Reporting person: Atlas Investissement SAS · Sole voting: 0 · Shared voting: 82,982,244 · Sole dispositive: 0 · Shared dispositive: 82,982,244 · SCHEDULE 13D/A, 2026-09-24
- · Holder: Atlas Investissement SAS · Percent: 49.5% · SCHEDULE 13D/A
- · Holder: Atlas Investissement SAS · Percent: 46.7% · SCHEDULE 13D/A
- · Holder: Atlas Investissement SAS · Percent: 46% · SCHEDULE 13D/A
- · Holder: Atlas Investissement SAS · Percent: 44.1% · SCHEDULE 13D/A
Millicom International Cellular Sa has 11 Schedule 13D or 13G filings on record since 2025-08-13. 1 holder's latest filing reports 5% or more of common shares. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| 49.5% | 82,982,244 | SCHEDULE 13D/A, 2026-09-24 | 2026-09-22 |
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Atlas Investissement SAS | 0 | 82,982,244 | 0 | 82,982,244 | SCHEDULE 13D/A, 2026-09-24 |
| Iliad Holding SAS | 0 | 82,982,244 | 0 | 82,982,244 | SCHEDULE 13D/A, 2026-09-24 |
| Maya SAS | 0 | 82,982,244 | 0 | 82,982,244 | SCHEDULE 13D/A, 2026-09-24 |
| Xavier Niel | 0 | 82,982,244 | 0 | 82,982,244 | SCHEDULE 13D/A, 2026-09-24 |
| Jules Niel | 0 | 82,982,244 | 0 | 82,982,244 | SCHEDULE 13D/A, 2026-09-24 |
| John Niel | 0 | 82,982,244 | 0 | 82,982,244 | SCHEDULE 13D/A, 2026-09-24 |
| Elisa Niel | 0 | 82,982,244 | 0 | 82,982,244 | SCHEDULE 13D/A, 2026-09-24 |
| Joseph Niel | 0 | 82,982,244 | 0 | 82,982,244 | SCHEDULE 13D/A, 2026-09-24 |
The latest filing identifies Millicom International Cellular Sa by CUSIP L6388F110 and gives its principal executive office as 8400 NW 36th Street, Suite 530, Doral, FL 33166 (SCHEDULE 13D/A, 2026-09-24).
Purpose of Transaction (Item 4)
Atlas Investissement SAS
Item 4 of the Schedule 13D is hereby amended and supplemented by adding the following: The information set forth in Item 3 of this Amendment No. 30 is incorporated herein by reference. In addition, Atlas Investissement intends (subject to certain conditions, including obtaining relevant regulatory approvals, as may be required and in accordance with the documentation pertaining to the Equity Financing Transactions) to purchase additional Common Shares up to a beneficial ownership of 50.5% of the outstanding Common Shares of the Issuer at the time of such acquisition. The actual timing and amount of such purchases will depend on the prevailing market conditions at the time of such purchases. Separately from the above, Atlas Investissement settled the three European-style call spread option transactions contemplated under each of the respective Letter Agreements on Share Option Transaction (as defined and described in Amendment No. 20 to the Schedule 13D) for cash (the "Cash Settlement"), over a range of dates between July and September 2026.Item 4 of the SCHEDULE 13D/A filed 2026-09-24
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-13 | Atlas Investissement SAS | 42.2% | SCHEDULE 13D/A |
| 2025-08-22 | Atlas Investissement SAS | 42.2% | SCHEDULE 13D/A |
| 2025-09-04 | Atlas Investissement SAS | 42.2% | SCHEDULE 13D/A |
| 2025-09-22 | Atlas Investissement SAS | 42.2% | SCHEDULE 13D/A |
| 2025-11-14 | Atlas Investissement SAS | 42.2% | SCHEDULE 13D/A |
| 2026-02-12 | Atlas Investissement SAS | 42.2% | SCHEDULE 13D/A |
| 2026-03-13 | Atlas Investissement SAS | 44.1% | SCHEDULE 13D/A |
| 2026-03-27 | Atlas Investissement SAS | 46% | SCHEDULE 13D/A |
| 2026-06-23 | Atlas Investissement SAS | 46.7% | SCHEDULE 13D/A |
| 2026-06-29 | Atlas Investissement SAS | 49.5% | SCHEDULE 13D/A |
| 2026-09-24 | Atlas Investissement SAS | 49.5% | SCHEDULE 13D/A |
Questions about who owns Millicom International Cellular Sa
Who owns Millicom International Cellular Sa?
On this page, one holder's latest ownership filing reports 5% or more of Millicom International Cellular Sa: Atlas Investissement SAS (49.5%, Schedule 13D/A, filed 2026-09-24).
When did Atlas Investissement SAS buy into Millicom International Cellular Sa?
The filings give report dates, not purchase dates. The earliest filing from Atlas Investissement SAS on this page is the Schedule 13D/A, filed 2025-08-13, reporting 42.2%; its latest, Schedule 13D/A filed 2026-09-24, reports 49.5%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 11 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.