OGK-2 Group 3M 2021 Financial Highlights and Results Analysis

OGK-2 Group 3M 2021 IFRS Results May 19, 2021

Disclaimer The information contained herein has been prepared using information available to JSC OGK-2 (hereinafter - OGK-2 or the Company) at the time of preparation of the presentation. Since making a presentation, on the activities of OGK-2 and the content of the presentation could affect the external or other factors. In addition all relevant information about OGK-2 may not be included in this presentation. No representation or warranty, expressed or implied, is made as to the accuracy, completeness or reliability of the information. Any forward looking information herein has been prepared on the basis of a number of assumptions which may prove to be incorrect. Forward looking statements, by the nature, involve risk and uncertainty. OGK-2 cautions that actual results may differ materially from those expressed or implied in such statements. Reference should be made to the most recent Annual Report for a description of the major risk factors. This presentation does not constitute or form part of any advertisement of securities, any offer or invitation to sell or issue or any solicitation of any offer to purchase or subscribe for, any shares in OGK-2, nor shall it or any part of it nor the fact of its presentation or distribution form the basis of, or be relied on in connection with, any contract or investment decision. OGK-2 Group 3M 2021 IFRS Results

Operational and Financial Highlights Operational Highlights1 Financial Highlights, mn RUR 3 2020 3 2021 Change 3 2020 3 2021 Change Revenue 34,350 36,861 +7.3% Electricity Output, mn kWh 13,226 12,203 -7.7% Operating Expenses, incl. (23,836) (27,520) +15.5% Effective Electricity Output Without Regard to Financial Operations, mn kWh Useful Heat Output, thousand Gcal Fuel Rate on Electricity, g/kWh 12,336 11,397 -7.6% Variable Costs2 Fixed Costs2 (16,700) (18,340) +9.8% (7,136) (9,180) +28.6% 2,147 1,952 -9.1% Impairment Loss Reversal on Financial Assets 74 133 +79.7% 319.7 328.7 +2.8% Operating Profit 10,588 9,474 -10.5% Fuel Rate on Heat, kg/Gcal 165.8 166.0 +0.1% EBITDA3 EBITDA, adj.4 Profit / Comprehensive Income for the Period 13,976 12,997 -7.0% 13,978 12,997 -7.0% Installed Capacity Load Factor, % 1 Management report data 2 Variable and fixed costs classification is based upon management report methodology 3 EBITDA = Operating profit + Depreciation and Amortization 4 EBITDA, adj. = Operating profit + Depreciation and Amortization + Impairment Loss (Reserve Accrual) for Non-financial Assets - Income from Impairment Loss Reversal (Reserve) for Non-financial Assets + Income from Impairment Loss Reversal (Reserve) for Advance Payments - Impairment Loss (Reserve Accrual) for Advance Payments 31.8 34.3 +2.5 p.p. 7,937 7,143 -10.0% OGK-2 Group 3M 2021 IFRS Results

Revenue Revenue Structure, mn RUR Prices and Tariffs1 3M 2021 36,861 34,350 500 1,717 330 Other 1,809 Average electricity price at the free market, RUR/MWh 1,380.72 Heat 34,644 Average heat tariff, RUR/Gcal 879.36 32,211 Average price for new capacity, RUR/MW per month Average price for old capacity, RUR/MW per month Electricity and Capacity 1,257,229.67 3 2020 3 2021 151,790.27 Electricity and Capacity Revenue Structure for 3M 2021 1 Structure of Electricity Sales Volume at the Wholesale Market for 3M 20211 Regulated Market, 19% Capacity, 50% Electricity, 50% Free Market, 81% 1 Management report data OGK-2 Group 3M 2021 IFRS Results

Variable Costs Variable Costs Change Factors Variable Costs Structure, mn RUR Increase of fuel expenses resulted from generating equipment load rescheduling among stations. 3 2020 3 2021 Change Fuel 14,720 15,880 +7.9% Purchased capacity and electricity expenses growth was due to increased purchase volume and prices at the wholesale market, in order to comply with regulated contracts, along with generating equipment load rescheduling among stations. Electricity and Capacity 1,980 2,460 +24.2% Total Variable Costs +9.8% 16,700 18,340 Fuel Expenses, mn RUR Fuel Consumption, thous. t1 3,249 3,238 +7.9% 15,880 14,720 1,111 898 6 4 Gas Coal Fuel Oil 3 2020 3 2021 3 2020 3 2021 1 Management report data OGK-2 Group 3M 2021 IFRS Results

Fixed Costs Fixed Costs and Depreciation Change Factors Fixed Costs Structure, mn RUR Fixed costs increase was dew to income from PP&E and other property sale, including property at Krasnoyarskaya station-2, in 1Q 2020. Rent expenses decreased on the account of Adlerskaya TPS rent termination, following its acquisition in December, 2020. Taxes, other than income tax decrease resulted from indication of income from property tax benefit for previous periods in 1Q 2021. 3 2020 3 2021 Change Employee Benefit 2,411 2,205 -8.5% Repairs and Maintainance 695 693 -0.3% Electricity Market Administration -1.4% 554 546 Taxes, Other than Income Tax 718 344 -52.1% Rent 1,254 575 -54.1% Total Fixed Costs, mn RUR Loss (Income) from PP&E, Other Non-current Assets and Available for Sale Assets Disposal 9,180 (3,770) (33) -99.1% +28.6% 7,136 Depreciation and Amortization 3,388 3,523 +4.0% Other Fixed Costs 1,886 1,327 -29.6% 3 2020 3 2021 Total Fixed Costs 7,136 9,180 +28.6% OGK-2 Group 3M 2021 IFRS Results

EBITDA and Profit EBITDA, mn RUR Profit Bridge for 3M 2021, mn RUR +245 13,976 -743 -7.0% -22 12,997 -1,811 9,474 7,143 Operating Profit Finance Income Finance Costs Share in Associated Entities Loss Income Tax Charge Profit 3 2020 3 2021 1 EBITDA, adj. = Revenue - Operating Expenses, incl. Depreciation and Amortization, + Impairment Loss on non-financial assets OGK-2 Group 3M 2021 IFRS Results

Debt Debt Structure, mn RUR Debt Maturity Profile, as of March 31, 2021, mn RUR Net Debt, mn RUR1 Net Debt/ EBITDA 0 >5 Years -4.1% 1.42 44,942 1.41 43,102 6,065 2,331 4-5 Years 5,325 44,935 43,036 1,903 3-4 Years 31,569 30,590 38,877 37,777 6,500 2-3 Years 27,043 1-2 Years 31.12.2020 31.03.2021 31.12.2019 Current Debt and Current Portion of Non- current Debt 31.12.2020 Net Debt as of the Period's End 5,325 <1 Year EBITDA for 12 months Non-current Debt 1 Net debt = Total amount of borrowings less cash and cash equivalents OGK-2 Group 3M 2021 IFRS Results

Thank You For Your Attention! IR contacts: Natalya Grizel Tel.: + 7 (812) 646-13-64, ext. 2416 Email: Grizel.Natalya@ogk2.ru 8 OGK-2 Group 3M 2021 IFRS Results