BALANCE SHEETS - PSO - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
CURRENT ASSETS
Cash and Cash Equivalents	$ 197	$ 203
Accounts Receivable:
Customers	1,166	1,100
Miscellaneous	60	64
Total Accounts Receivable	2,867	2,632
Fuel	576	749
Materials and Supplies	1,046	966
Risk Management Assets	352	210
Accrued Tax Benefits	85	38
Regulatory Asset for Under-Recovered Fuel Costs	426	446
Prepayments and Other Current Assets	212	287
TOTAL CURRENT ASSETS	6,052	5,789
PROPERTY, PLANT AND EQUIPMENT
Generation	28,388	24,830
Transmission	42,557	38,872
Distribution	33,364	31,062
Other Property, Plant and Equipment	8,635	7,491
Construction Work in Progress	7,635	6,347
Total Property, Plant and Equipment	120,579	108,602
Accumulated Depreciation and Amortization	28,205	26,186
TOTAL PROPERTY, PLANT AND EQUIPMENT – NET	92,374	82,416
OTHER NONCURRENT ASSETS
Regulatory Assets	4,804	5,129
Operating Lease Assets	661	580
Deferred Charges and Other Noncurrent Assets	4,402	3,873
TOTAL OTHER NONCURRENT ASSETS	16,034	14,873
TOTAL ASSETS	114,460	103,078
CURRENT LIABILITIES
Accounts Payable	3,429	2,638
Long-term Debt Due Within One Year	3,194	3,335
Risk Management Liabilities	132	100
Customer Deposits	507	455
Accrued Taxes	2,002	1,922
Accrued Interest	544	453
Obligations Under Operating Leases	100	92
Other Current Liabilities	1,898	1,490
TOTAL CURRENT LIABILITIES	13,314	13,009
NONCURRENT LIABILITIES
Long-term Debt	44,128	39,308
Deferred Income Taxes	10,951	9,972
Regulatory Liabilities and Deferred Investment Tax Credits	8,362	8,344
Asset Retirement Obligations	3,556	3,531
Obligations Under Operating Leases	578	504
Deferred Credits and Other Noncurrent Liabilities	905	801
TOTAL NONCURRENT LIABILITIES	68,890	63,045
TOTAL LIABILITIES	82,204	76,054
Rate Matters (Note 4)
Commitments and Contingencies (Note 6)
COMMON SHAREHOLDER’S EQUITY
Common Stock	3,523	3,472
Paid-in Capital	12,138	9,606
Retained Earnings	15,441	13,869
Accumulated Other Comprehensive Income (Loss)	36	(3)
TOTAL COMMON SHAREHOLDER’S EQUITY	31,138	26,944
TOTAL LIABILITIES AND EQUITY	114,460	103,078
PUBLIC SERVICE COMPANY OF OKLAHOMA
CURRENT ASSETS
Cash and Cash Equivalents	2	2
Advances to Affiliates	0	232
Accounts Receivable:
Customers	109	75
Affiliated Companies	45	33
Miscellaneous	4	0
Total Accounts Receivable	158	108
Fuel	3	17
Materials and Supplies	119	109
Risk Management Assets	42	21
Accrued Tax Benefits	8	36
Regulatory Asset for Under-Recovered Fuel Costs	37	65
Prepayments and Other Current Assets	14	18
TOTAL CURRENT ASSETS	383	608
PROPERTY, PLANT AND EQUIPMENT
Generation	4,365	2,772
Transmission	1,433	1,345
Distribution	3,987	3,699
Other Property, Plant and Equipment	1,292	550
Construction Work in Progress	635	379
Total Property, Plant and Equipment	11,712	8,745
Accumulated Depreciation and Amortization	2,748	2,213
TOTAL PROPERTY, PLANT AND EQUIPMENT – NET	8,964	6,532
OTHER NONCURRENT ASSETS
Regulatory Assets	637	528
Employee Benefits and Pension Assets	95	74
Operating Lease Assets	126	106
Deferred Charges and Other Noncurrent Assets	13	62
TOTAL OTHER NONCURRENT ASSETS	871	770
TOTAL ASSETS	10,218	7,910
CURRENT LIABILITIES
Advances from Affiliates	171	0
Long-term Debt Due Within One Year	51	126
Risk Management Liabilities	27	6
Customer Deposits	115	73
Accrued Taxes	37	33
Accrued Interest	67	33
Obligations Under Operating Leases	11	10
Other Current Liabilities	104	78
TOTAL CURRENT LIABILITIES	1,009	619
NONCURRENT LIABILITIES
Long-term Debt	3,475	2,730
Deferred Income Taxes	1,113	931
Regulatory Liabilities and Deferred Investment Tax Credits	717	690
Asset Retirement Obligations	136	119
Obligations Under Operating Leases	122	102
Deferred Credits and Other Noncurrent Liabilities	33	33
TOTAL NONCURRENT LIABILITIES	5,596	4,605
TOTAL LIABILITIES	6,605	5,224
Rate Matters (Note 4)
Commitments and Contingencies (Note 6)
COMMON SHAREHOLDER’S EQUITY
Common Stock	157	157
Paid-in Capital	1,718	1,042
Retained Earnings	1,736	1,484
Accumulated Other Comprehensive Income (Loss)	2	3
TOTAL COMMON SHAREHOLDER’S EQUITY	3,613	2,686
TOTAL LIABILITIES AND EQUITY	10,218	7,910
PUBLIC SERVICE COMPANY OF OKLAHOMA | Affiliated Entity
CURRENT LIABILITIES
Accounts Payable	87	59
PUBLIC SERVICE COMPANY OF OKLAHOMA | Nonrelated Party
CURRENT LIABILITIES
Accounts Payable	$ 339	$ 201