CONDENSED CONSOLIDATED BALANCE SHEETS - AEP Transmission Holdco - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Accounts Receivable:
Customers	$ 1,141.4	$ 1,100.1
Miscellaneous	63.2	64.1
Total Accounts Receivable	2,833.1	2,631.9
Prepayments and Other Current Assets	260.8	285.9
TOTAL CURRENT ASSETS	6,860.0	5,788.8
TRANSMISSION PROPERTY
Transmission Property	40,987.3	38,871.9
Other Property, Plant and Equipment	8,385.1	7,491.6
Construction Work in Progress	7,456.7	6,346.9
Total Property, Plant and Equipment	115,889.5	108,602.0
Accumulated Depreciation and Amortization	27,871.8	26,186.4
TOTAL PROPERTY, PLANT AND EQUIPMENT – NET	88,017.7	82,415.6
OTHER NONCURRENT ASSETS
Regulatory Assets	4,950.2	5,129.2
Deferred Charges and Other Noncurrent Assets	3,718.5	3,873.3
TOTAL OTHER NONCURRENT ASSETS	15,375.8	14,873.6
TOTAL ASSETS	110,253.5	103,078.0
CURRENT LIABILITIES
Accounts Payable	2,806.7	2,637.6
Long-term Debt Due Within One Year	1,898.6	3,335.0
Accrued Taxes	1,257.2	1,922.1
Accrued Interest	606.4	453.3
Obligations Under Operating Leases	98.4	91.9
Other Current Liabilities	1,551.4	1,490.9
TOTAL CURRENT LIABILITIES	9,997.6	13,009.3
NONCURRENT LIABILITIES
Long-term Debt	44,239.0	39,307.8
Deferred Income Taxes	10,713.9	9,972.4
Regulatory Liabilities	8,320.0	8,344.0
Obligations Under Operating Leases	496.3	504.3
Deferred Credits and Other Noncurrent Liabilities	844.6	800.6
TOTAL NONCURRENT LIABILITIES	68,715.9	63,044.8
TOTAL LIABILITIES	78,713.5	76,054.1
Rate Matters (Note 4)
Commitments and Contingencies (Note 5)
MEMBER’S EQUITY
Retained Earnings	15,369.3	13,869.2
TOTAL LIABILITIES, MEZZANINE EQUITY AND TOTAL EQUITY	110,253.5	103,078.0
AEPTCo
CURRENT ASSETS
Advances to Affiliates	67.6	30.4
Accounts Receivable:
Customers	42.5	58.9
Miscellaneous	0.0	1.3
Total Accounts Receivable	197.2	194.3
Prepayments and Other Current Assets	5.1	11.1
TOTAL CURRENT ASSETS	269.9	235.8
TRANSMISSION PROPERTY
Transmission Property	15,925.1	14,913.4
Other Property, Plant and Equipment	545.8	516.1
Construction Work in Progress	2,097.6	1,965.4
Total Property, Plant and Equipment	18,568.5	17,394.9
Accumulated Depreciation and Amortization	1,839.8	1,578.4
TOTAL PROPERTY, PLANT AND EQUIPMENT – NET	16,728.7	15,816.5
OTHER NONCURRENT ASSETS
Regulatory Assets	64.1	0.4
Deferred Property Taxes	95.5	308.9
Deferred Charges and Other Noncurrent Assets	50.4	8.7
TOTAL OTHER NONCURRENT ASSETS	210.0	318.0
TOTAL ASSETS	17,208.6	16,370.3
CURRENT LIABILITIES
Accounts Payable	354.1	360.5
Long-term Debt Due Within One Year	0.0	90.0
Accrued Taxes	401.1	665.9
Accrued Interest	74.1	44.9
Obligations Under Operating Leases	1.3	1.3
Other Current Liabilities	28.6	44.5
TOTAL CURRENT LIABILITIES	1,077.0	1,408.8
NONCURRENT LIABILITIES
Long-term Debt	6,240.4	5,678.1
Deferred Income Taxes	1,480.4	1,278.6
Regulatory Liabilities	675.6	878.4
Obligations Under Operating Leases	1.7	1.2
Deferred Credits and Other Noncurrent Liabilities	20.5	174.3
TOTAL NONCURRENT LIABILITIES	8,418.6	8,010.6
TOTAL LIABILITIES	9,495.6	9,419.4
Rate Matters (Note 4)
Commitments and Contingencies (Note 5)
MEMBER’S EQUITY
Paid-in Capital	4,934.0	3,100.6
Retained Earnings	1,733.9	3,850.3
TOTAL MEMBER’S EQUITY	6,667.9	6,950.9
Noncontrolling Interest	1,045.1	0.0
TOTAL EQUITY	7,713.0	6,950.9
TOTAL LIABILITIES, MEZZANINE EQUITY AND TOTAL EQUITY	17,208.6	16,370.3
AEPTCo | Affiliated Entity
Accounts Receivable:
Affiliated Companies	154.7	134.1
CURRENT LIABILITIES
Advances from Affiliates	108.9	84.7
Accounts Payable	$ 108.9	$ 117.0