Amendment: SEC Form SC 13D/A filed by Millicom International Cellular S.A.

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 16)*

MILLICOM INTERNATIONAL CELLULAR S.A.

(Name of Issuer)

Common Shares

(Title of Class of Securities)

L6388F110

(CUSIP Number)

Denis Klimentchenko

Skadden, Arps, Slate, Meagher & Flom (UK) LLP

22 Bishopsgate

London, EC2N 4BQ

Tel: +44(0)20 7519 7289

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

September 6, 2024

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box: x

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent.

*The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No.: L6388F110

(1) Reflects (i) 67,005,179 Swedish Depositary Receipts (“SDRs”) beneficially owned by Atlas Luxco S.à r.l. (“Atlas”), which may be exchanged for Issuer common shares, par value $1.50 per share (“Common Shares”), on a one-for-one basis; and (ii) 2,230,932 Common Shares beneficially owned by Atlas. Atlas Investissement, as the controlling shareholder of Atlas, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas. NJJ Holding, as the controlling shareholder of Atlas Investissement, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas and Atlas Investissement. Xavier Niel, as the sole owner of NJJ Holding, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas, Atlas Investissement and NJJ Holding.

CUSIP No.: L6388F110

(1) Reflects (i) 67,005,179 SDRs beneficially owned by Atlas, which may be exchanged for Common Shares on a one-for-one basis; and (ii) 2,230,932 Common Shares beneficially owned by Atlas. Atlas Investissement, as the controlling shareholder of Atlas, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas. NJJ Holding, as the controlling shareholder of Atlas Investissement, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas and Atlas Investissement. Xavier Niel, as the sole owner of NJJ Holding, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas, Atlas Investissement and NJJ Holding.

CUSIP No.: L6388F110

(1) Reflects (i) 67,005,179 SDRs beneficially owned by Atlas, which may be exchanged for Common Shares on a one-for-one basis; and (ii) 2,230,932 Common Shares beneficially owned by Atlas. Atlas Investissement, as the controlling shareholder of Atlas, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas. NJJ Holding, as the controlling shareholder of Atlas Investissement, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas and Atlas Investissement. Xavier Niel, as the sole owner of NJJ Holding, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas, Atlas Investissement and NJJ Holding.

CUSIP No.: L6388F110

(1) Reflects (i) 67,005,179 SDRs beneficially owned by Atlas, which may be exchanged for Common Shares on a one-for-one basis; and (ii) 2,230,932 Common Shares beneficially owned by Atlas. Atlas Investissement, as the controlling shareholder of Atlas, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas. NJJ Holding, as the controlling shareholder of Atlas Investissement, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas and Atlas Investissement. Xavier Niel, as the sole owner of NJJ Holding, may be deemed to have shared beneficial ownership over the Common Shares beneficially owned by Atlas, Atlas Investissement and NJJ Holding.

Explanatory Note

This Amendment No. 16 (“Amendment No. 16”) to Schedule 13D relates to the Common Shares, par value $1.50 per share (the “Common Shares”), of Millicom International Cellular S.A., a Luxembourg company (the “Issuer”), and amends and supplements the initial statement on Schedule 13D filed on February 24, 2023, as amended by Amendment No. 1 to the Schedule 13D filed on March 28, 2023, Amendment No. 2 to the Schedule 13D filed on April 26, 2023, Amendment No. 3 to the Schedule 13D filed on May 12, 2023, Amendment No. 4 to the Schedule 13D filed on May 25, 2023, Amendment No. 5 to the Schedule 13D filed on June 2, 2023, Amendment No. 6 to the Schedule 13D filed on July 24, 2023, Amendment No. 7 to the Schedule 13D filed on August 24, 2023, Amendment No. 8 to the Schedule 13D filed on October 2, 2023, Amendment No. 9 to the Schedule 13D filed on November 8, 2023, Amendment No. 10 to the Schedule 13D filed on January 17, 2024, Amendment No. 11 to the Schedule 13D filed on May 23, 2024, Amendment No. 12 to the Schedule 13D filed on July 3, 2024, Amendment No 13. to the Schedule 13D filed on July 22, 2024, Amendment No. 14 to the Schedule 13D filed on August 2, 2024 and Amendment No. 15 to the Schedule 13D filed on August 26, 2024 (as so amended, the “Schedule 13D”). Capitalized terms used but not defined in this Amendment No. 16 shall have the same meanings ascribed to them in the Schedule 13D.

Item 4. Purpose of Transaction.

Item 4 of the Schedule 13D is hereby amended and supplemented by adding the following:

On September 6, 2024, Atlas entered into a blind mandate purchase plan, in the form of an SDR Purchase Mandate (the “Purchase Mandate”), pursuant to which Atlas may purchase up to a maximum of 7,000,000 SDRs, subject to certain other pre-agreed pricing limits and volume limits. The maximum purchase price for each SDR will be the SEK equivalent, from time to time, of USD 25.75. The amount and timing of any purchase, if any, may vary and will be determined based on market conditions, share price and other factors. The program will not require Atlas to purchase any specific number of SDRs or execute any purchases at all, and may be modified, suspended or terminated at any time at short notice in accordance with the terms of the Purchase Mandate.

The foregoing description of the Purchase Mandate is qualified in its entirety by reference to the Purchase Mandate, which is filed as Exhibit 16 to the Schedule 13D and incorporated herein by reference.

Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.

Item 6 of the Schedule 13D is hereby amended and supplemented as follows:

The information set forth in Item 4 of this Amendment No. 16 is incorporated herein by reference.

Item 7. Material to be filed as Exhibits.

Item 7 of the Schedule 13D is hereby amended by adding the following exhibit:

SIGNATURES

After reasonable inquiry and to the best of each of the undersigned’s knowledge and belief, each of the undersigned, severally and not jointly, certifies that the information set forth in this statement is true, complete and correct.

Dated: September 9, 2024