TAQA H1 2021 Results - Energy Transition and Financial Performance

4 Long-standing, transparent & internationally-aligned regulation Business Model for Transmission and Distribution segment in Abu Dhabi Key Elements of the T&D Regulation Remuneration of transmission and distribution companies Abu Dhabi government objective & guidelines Local Regulator دائرة الطاقة T&D suppliers regulated by the DoE Abu Dhabi Distribution Company (ADDC) Al Ain Distribution Company (AADC) • Abu Dhabi Transmission and Despatch Company (Transco) حكومة أبوظبي GOVERNMENT OF ABU DHABI DEPARTMENT OF ENERGY Abu Dhabi Department of Energy Regulation of energy sector is fully aligned with Government of Abu Dhabi's objectives of guaranteeing supply to customers in line with global levels of service Regulates and supervises the energy sector in Abu Dhabi Regulations and codes are available publicly on DoE website Evolution of Regulatory Periods Since 1999 Revenue Flow in the Regulated Networks System Transco TUOS Discos (ADDC and AADC) Gov't subsidy Tariff Abu Dhabi Government Customers RAB-based framework with transparent and publicly available regulatory guidelines Framework adjusted every 4 years, following a stable methodology and internationally-aligned regulatory WACC Abu Dhabi networks' regulation in place since 1999, with no major changes to regulatory principles since then Revenue Building Blocks for Regulated Companies MAR dominated by fixed component at 85% of total revenues Other Pass-Through Performance Incentives Variable Terms MAR collected from end users and government subsidy acting as a revenue balancer PC1, 2, 3, 4 & 5 RC1 RC2 Previous regulatory periods Current period 1999-2017 2018-2022 Next period 2023 - 2026 • Stable regulatory framework with same principles being applied since inception of regulation in 1999 • Regulatory periods usually last for 4 years • Current RC1 period to be extended for an extra year to ensure continuity during the Covid situation Depreciation Opex Return on Capital (WACC x RAV) Required Revenue Fixed Terms Maximum Allowed Revenue (MAR) NPV framework to determine Fixed & Variable terms Sources: Abu Dhabi Department of Energy Regulation & Supervision Bureau (now superseded by the Abu Dhabi Department of Energy) TAQA's constant dialogue with the regulator and relationship with the DoE ensure a continuing optimal regulatory environment 26 TAQA

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