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First Quarter 2022 Earnings Report

1. Chilean regulatory context Networks businesses Networks tariff review INTERNAL Basic Services Law Total Enel Distribución overdue debt Apr 21 Aug 21 Dec 21 H2 22 Mar-21 Mar-22 Transmission m2020-23 Period review Consultant report Regulator technical report Expert panel Tariffs decree clients overdue # ('000) 584 621 7% Returns (real terms post tax) +32% Distribution 2020-24 Period review Process still ongoing Consultant report Regulator technical report Expert panel Tariffs decree 6% Returns (real terms post tax) Total Overdue debt, including Basic Service Law. Exchange rate at the end of the period: Mar/22 (786.93 CLP/USD) Overdue debt (USD mn)1 170 224 Q1 2021 Q1 2022 enel 25 55

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