S-13 See Condensed Notes to Condensed Financial Information beginning on page S-17. SCHEDULE I AEP TRANSMISSION COMPANY, LLC (AEPTCo Parent) CONDENSED FINANCIAL INFORMATION CONDENSED STATEMENTS OF INCOME For the Years Ended December 31, 2019, 2018 and 2017 (in millions) Years Ended December 31, 2019 2018 2017 EXPENSES Other Operation $ 0.3 $ — $ — TOTAL EXPENSES 0.3 — — OPERATING LOSS (0.3) — — Other Income (Expense): Interest Income - Affiliated 123.8 104.6 82.9 Interest Expense (122.1) (103.4) (82.4) INCOME BEFORE INCOME TAX EXPENSE AND EQUITY EARNINGS OF UNCONSOLIDATED SUBSIDIARIES 1.4 1.2 0.5 Income Tax Expense 0.3 0.2 0.2 Equity Earnings of Unconsolidated Subsidiaries 438.6 314.9 270.4 NET INCOME $ 439.7 $ 315.9 $ 270.7