6-K

UNITED STATES

SECURITIES AND EXCHANGECOMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATEISSUER

PURSUANT TO RULE 13a-16OR 15d-16

OF THE SECURITIES EXCHANGEACT OF 1934

For the monthof April, 2023

Commission File Number:001-40876

IHS Holding Limited

(Translation of registrant’s name into English)

1 Cathedral Piazza

123 Victoria Street

London SW1E 5BP

United Kingdom

(Address of principal executive offices)

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  x    Form 40-F  ¨

On April 28, 2023, IHS Holding Limited issued a notice of its annual general meeting, a copy of which is furnished herewith as Exhibit 99.1 to this Report on Form 6-K.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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Exhibit 99.1

ihs holding limited

(The “Company”)

(incorporated in the Cayman Islands with limited liability)

(NYSE Ticker: IHS)

NOTICEOF Annual GENERAL MEETING

to be held on June 7, 2023

(or any adjournment thereof)

NOTICEis hereby given that the Annual General Meeting (the “AGM”) of the Company will be held at 8.30 a.m. E.T. (1.30 p.m. U.K. time) on June 7, 2023 at 190 Elgin Avenue, George Town, Grand Cayman KY1-9001, Cayman Islands, and live via webcast at www.virtualshareholdermeeting.com/IHS2023.

There is no special business to be considered, and no proposal will be submitted to shareholders for approval at the AGM. Instead, the AGM will serve as an open forum for shareholders to discuss Company affairs with management.

The Board of Directors of the Company has fixed the close of business E.T. on April 17, 2023 as the record date (the “Record Date”) for determining the shareholders entitled to receive notice of the AGM or any adjournment thereof.

Holders of record of the Company’s ordinary shares at the close of business on the Record Date are entitled to attend the AGM and any adjournment thereof in person or live via webcast at www.virtualshareholdermeeting.com/IHS2023.

Shareholders may obtain a copy of the Company’s Annual Report for the fiscal year ended December 31, 2022 free of charge, on the investor relations section of the Company’s website at www.ihstowers.com or on the SEC’s website at www.sec.gov.

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