Investor Presentaiton

Non-GAAP Financial Measures Sierra Pacific Power ($ in millions) FFO LTM 9/30/2021 2020 2019 Net cash flows from operating activities $ 124 $ 190 $ 237 +/- changes in other operating assets and liabilities 22 4 35 +/- deferred energy (including amortization) FFO 103 31 (13) $ 249 $ 225 $ 259 Interest expense FFO Interest Coverage $ 55 $ 56 $ 48 5.5x 5.0x 6.4x Debt FFO to Debt Capitalization $ 1,291 19.3% $ 1,209 18.6% $ 1,135 22.8% Sierra Pacific Power shareholder's equity Debt $ 1,518 1,291 Capitalization $ 2,809 $ 1,411 1,209 $ 2,620 $ 1,320 1,135 $ 2,455 Debt to Total Capitalization 46% 46% 46% 81 4

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