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Derivative financial instruments - Notional amount (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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IHS Holding limited, Senior Note Maturing 2026 |  |
Derivative financial instruments |  |
Derivative instruments, notional amount | $ 200.0 |
IHS Holding limited, Senior Note Maturing 2028 |  |
Derivative financial instruments |  |
Derivative instruments, notional amount | 500.0 |
IHS Holding limited, Senior Note Maturing 2030 |  |
Derivative financial instruments |  |
Derivative instruments, notional amount | 550.0 |
IHS Holding limited, Senior Note Maturing 2031 |  |
Derivative financial instruments |  |
Derivative instruments, notional amount | $ 650.0 |
Redemption after September 17, 2024 | IHS Netherlands Holdco B.V., Senior Note Maturing 2027 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 100.00% |
Redemption between November 29, 2023 - November 28, 2024 | IHS Holding limited, Senior Note Maturing 2026 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 102.8125% |
Redemption between November 29, 2024 - November 28, 2025 | IHS Holding limited, Senior Note Maturing 2026 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 101.40625% |
Redemption between November 29, 2024 - November 28, 2025 | IHS Holding limited, Senior Note Maturing 2028 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 103.125% |
Redemption after November 29, 2025 | IHS Holding limited, Senior Note Maturing 2026 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 100.00% |
Redemption between November 29, 2025 - November 28, 2026 | IHS Holding limited, Senior Note Maturing 2028 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 101.5625% |
Redemption between November 29, 2026 - November 28, 2027 | IHS Holding limited, Senior Note Maturing 2030 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 103.9375% |
Redemption between November 29, 2027 - November 28, 2028 | IHS Holding limited, Senior Note Maturing 2030 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 101.96875% |
Redemption between November 29, 2027 - November 28, 2028 | IHS Holding limited, Senior Note Maturing 2031 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 104.125% |
Redemption between November 29, 2028 - November 28, 2029 | IHS Holding limited, Senior Note Maturing 2031 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 102.0625% |
Redemption after November 29, 2026 | IHS Holding limited, Senior Note Maturing 2028 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 100.00% |
Redemption after November 29, 2028 | IHS Holding limited, Senior Note Maturing 2030 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 100.00% |
Redemption after November 29, 2029 | IHS Holding limited, Senior Note Maturing 2031 |  |
Derivative financial instruments |  |
Early redemption price as a percentage of notional amount | 100.00% |
Derivatives |  |
Derivative financial instruments |  |
Derivative instruments, notional amount | $ 2,186.0 | $ 2,200.5
Embedded options within listed bonds |  |
Derivative financial instruments |  |
Derivative instruments, notional amount | $ 2,186.0 | 2,186.0
Foreign exchange swaps |  |
Derivative financial instruments |  |
Derivative instruments, notional amount |  | $ 14.5

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