First Quarter 2022 Earnings Report

INTERNAL The challenging context remains, but we have been able to take swap actions to strengths our portfolio... Enel Chile hydroelectric' cumulated energy (GWh) Gas supply overview Enel Chile gas consumption Q1 2022 enel System main indicators Avg. Spot Quillota 220kV (USD/MWh) Apr Jul Oct Jan Mar Hydrological year 2021-2022 2020-2021 Driest year 2022-2023 New hydrological year started in a better position than past year MMm3/d 8642 0 01/01/2021 01/02/2021 01/03/2021 01/04/2021 01/05/2021 01/06/2021 01/09/2021 01/07/2021 IN 01/08/2021 01/10/2021 NG 01/11/2021 01/12/2021 01/01/2022 01/02/2022 01/03/2022 Q1 2022 77.7 95.2 74.3 68.9 75.0 49.9 42.8 30.0 35.4 Q1 Q2 Q3 Q4 Our solid supply contract position and Argentine gas availability have allowed us to deliver LNG volumes in the northern zone The argentine gas supply successfully delivered during Q1 2022 drove us to face the volatility of commodity prices 12 shipments committed for 2022 avoiding supply risk Avg. Alto Jahuel 220kV (USD/MWh) Q1 2022 87.8 77.6 51.2 106.7 78.5 70.5 44.7 30.7 35.3 Q1 Q2 Q3 Q4 2021 2020 4

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