Q2 2026 Earnings

Reported July 30, 2026

Quarter Comparison

Revenue

Operating Income

Net Margin

Income Statement

Balance Sheet

Operating metrics disclosed this quarter

Read from the filing itself — XBRL does not carry these, so no standard financial dataset has them.

Commercial and Industrial Sales-Volume Change
11.8%
Customer Demand AEP uses sales volumes by customer class as a way to measure drivers of customer demand. Through the first half of 2026, AEP experienced higher customer demand, driven primarily by new data processing load added in the commercial and industrial customer classes. This growth was partially offset by weather-related impacts in the residential class, including favorable weather in the first and second quarters of 2025 and normal weather through the first half of 2026. The table below shows the percentage change in sales volume by customer class. (a) Percentage change for the three months ended June 30, 2026 as compared to the three months ended June 30, 2025. Load figures are billed and accrued retail sales excluding firm wholesale load. (b) Percentage change for the six months ended June 30, 2026 as compared to the six months ended June 30, 2025. Load figures are billed and accrued retail sales excluding firm wholesale load. Image transcription from https://www.sec.gov/Archives/edgar/data/4904/000000490426000059/aep-20260630_g1.jpg: Percentage Change in Sales Volume | Total Retail | QTD (a) 8.2% | YTD (b) 7.4% | Residential | QTD (a) (0.9)% | YTD (b) (3.8)% | Commercial and Industrial | QTD (a) 11.8% | YTD (b) 12.7%.
Residential Sales-Volume Change
-0.9%
Customer Demand AEP uses sales volumes by customer class as a way to measure drivers of customer demand. Through the first half of 2026, AEP experienced higher customer demand, driven primarily by new data processing load added in the commercial and industrial customer classes. This growth was partially offset by weather-related impacts in the residential class, including favorable weather in the first and second quarters of 2025 and normal weather through the first half of 2026. The table below shows the percentage change in sales volume by customer class. (a) Percentage change for the three months ended June 30, 2026 as compared to the three months ended June 30, 2025. Load figures are billed and accrued retail sales excluding firm wholesale load. (b) Percentage change for the six months ended June 30, 2026 as compared to the six months ended June 30, 2025. Load figures are billed and accrued retail sales excluding firm wholesale load. Image transcription from https://www.sec.gov/Archives/edgar/data/4904/000000490426000059/aep-20260630_g1.jpg: Percentage Change in Sales Volume | Total Retail | QTD (a) 8.2% | YTD (b) 7.4% | Residential | QTD (a) (0.9)% | YTD (b) (3.8)% | Commercial and Industrial | QTD (a) 11.8% | YTD (b) 12.7%.

Total Retail Sales-Volume Change

8.2%

Customer Demand AEP uses sales volumes by customer class as a way to measure drivers of customer demand. Through the first half of 2026, AEP experienced higher customer demand, driven primarily by new data processing load added in the commercial and industrial customer classes. This growth was partially offset by weather-related impacts in the residential class, including favorable weather in the first and second quarters of 2025 and normal weather through the first half of 2026. The table below shows the percentage change in sales volume by customer class. (a) Percentage change for the three months ended June 30, 2026 as compared to the three months ended June 30, 2025. Load figures are billed and accrued retail sales excluding firm wholesale load. (b) Percentage change for the six months ended June 30, 2026 as compared to the six months ended June 30, 2025. Load figures are billed and accrued retail sales excluding firm wholesale load. Image transcription from https://www.sec.gov/Archives/edgar/data/4904/000000490426000059/aep-20260630_g1.jpg: Percentage Change in Sales Volume | Total Retail | QTD (a) 8.2% | YTD (b) 7.4% | Residential | QTD (a) (0.9)% | YTD (b) (3.8)% | Commercial and Industrial | QTD (a) 11.8% | YTD (b) 12.7%.

AEP Consolidated Commercial and Industrial Energy Sales Volume

36.9K

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of KWh Energy Sales for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,119 | | | | 6,299 | | | | 12,651 | | | | 13,310 Commercial | | | 12,961 | | | | 11,042 | | | | 25,738 | | | | 20,630 Industrial | | | 8,104 | | | | 7,048 | | | | 14,976 | | | | 13,804 Miscellaneous | | | 171 | | | | 172 | | | | 337 | | | | 344 Total Retail (a) | | | 27,355 | | | | 24,561 | | | | 53,702 | | | | 48,088 Wholesale (b) | | | 256 | | | | 464 | | | | 899 | | | | 1,131 Total KWhs | | | 27,611 | | | | 25,025 | | | | 54,601 | | | | 49,219 (a) Represents energy delivered to distribution customers. (b) Primarily Ohio’s contractually obligated purchases of OVEC power sold to PJM. Derived: 7,238 VIU commercial + 8,584 VIU industrial + 12,961 T&D commercial + 8,104 T&D industrial = 36,887 million KWh.

AEP Consolidated Residential Energy Sales Volume

12.6K

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of KWh Energy Sales for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,119 | | | | 6,299 | | | | 12,651 | | | | 13,310 Commercial | | | 12,961 | | | | 11,042 | | | | 25,738 | | | | 20,630 Industrial | | | 8,104 | | | | 7,048 | | | | 14,976 | | | | 13,804 Miscellaneous | | | 171 | | | | 172 | | | | 337 | | | | 344 Total Retail (a) | | | 27,355 | | | | 24,561 | | | | 53,702 | | | | 48,088 Wholesale (b) | | | 256 | | | | 464 | | | | 899 | | | | 1,131 Total KWhs | | | 27,611 | | | | 25,025 | | | | 54,601 | | | | 49,219 (a) Represents energy delivered to distribution customers. (b) Primarily Ohio’s contractually obligated purchases of OVEC power sold to PJM. Derived: 6,443 million KWh VIU residential + 6,119 million KWh T&D residential = 12,562 million KWh.

AEP Consolidated Retail Energy Sales Volume

50.2K

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of KWh Energy Sales for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,119 | | | | 6,299 | | | | 12,651 | | | | 13,310 Commercial | | | 12,961 | | | | 11,042 | | | | 25,738 | | | | 20,630 Industrial | | | 8,104 | | | | 7,048 | | | | 14,976 | | | | 13,804 Miscellaneous | | | 171 | | | | 172 | | | | 337 | | | | 344 Total Retail (a) | | | 27,355 | | | | 24,561 | | | | 53,702 | | | | 48,088 Wholesale (b) | | | 256 | | | | 464 | | | | 899 | | | | 1,131 Total KWhs | | | 27,611 | | | | 25,025 | | | | 54,601 | | | | 49,219 (a) Represents energy delivered to distribution customers. (b) Primarily Ohio’s contractually obligated purchases of OVEC power sold to PJM. Derived: 22,832 million KWh VIU total retail + 27,355 million KWh T&D total retail = 50,187 million KWh.

AEP Consolidated Total Energy Sales Volume

54.0K

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of KWh Energy Sales for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,119 | | | | 6,299 | | | | 12,651 | | | | 13,310 Commercial | | | 12,961 | | | | 11,042 | | | | 25,738 | | | | 20,630 Industrial | | | 8,104 | | | | 7,048 | | | | 14,976 | | | | 13,804 Miscellaneous | | | 171 | | | | 172 | | | | 337 | | | | 344 Total Retail (a) | | | 27,355 | | | | 24,561 | | | | 53,702 | | | | 48,088 Wholesale (b) | | | 256 | | | | 464 | | | | 899 | | | | 1,131 Total KWhs | | | 27,611 | | | | 25,025 | | | | 54,601 | | | | 49,219 (a) Represents energy delivered to distribution customers. (b) Primarily Ohio’s contractually obligated purchases of OVEC power sold to PJM. Derived: 26,382 million KWh VIU total + 27,611 million KWh T&D total = 53,993 million KWh.

AEP Consolidated Wholesale Energy Sales Volume

3.8K

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of KWh Energy Sales for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,119 | | | | 6,299 | | | | 12,651 | | | | 13,310 Commercial | | | 12,961 | | | | 11,042 | | | | 25,738 | | | | 20,630 Industrial | | | 8,104 | | | | 7,048 | | | | 14,976 | | | | 13,804 Miscellaneous | | | 171 | | | | 172 | | | | 337 | | | | 344 Total Retail (a) | | | 27,355 | | | | 24,561 | | | | 53,702 | | | | 48,088 Wholesale (b) | | | 256 | | | | 464 | | | | 899 | | | | 1,131 Total KWhs | | | 27,611 | | | | 25,025 | | | | 54,601 | | | | 49,219 (a) Represents energy delivered to distribution customers. (b) Primarily Ohio’s contractually obligated purchases of OVEC power sold to PJM. Derived: 3,550 million KWh VIU wholesale + 256 million KWh T&D wholesale = 3,806 million KWh.

Coal-Fired Owned Generation Capacity

10.2K

The rules and environmental control requirements discussed below will have a material impact on AEP’s operations. As of June 30, 2026, AEP owned generating capacity of approximately 26,500 MWs, of which approximately 10,200 MWs were coal-fired. In April 2024, the Federal EPA announced four major new rules directed at fossil-fuel electric generation facilities. The Federal EPA administration has proposed to revise or repeal portions of those new rules. Management continues to evaluate the impacts of the rules that are currently in effect on the plans for the future of AEP’s generating fleet, in particular, the economic feasibility of making the requisite environmental investments in AEP’s fossil generation fleet. AEP continues to refine the cost estimates of complying with these rules to identify the best alternative for promoting compliance with all of the rules while meeting AEP’s obligations to provide reliable and affordable electricity.

Owned Generation Capacity

26.5K

Owned Generation Capacity Added

1.0K

AEP continues to secure resources to support forecasted load requirements in its regulated jurisdictions including: • The addition of 1,013 MWs of owned generating capacity in 2026. • Signing agreements in 2026 to acquire 1,838 MWs in additional generation facilities. • Requests for proposals seeking approximately 12,100 MWs of generating capacity. • Capacity purchase agreements to satisfy capacity reserve margins to serve customers. • Long-term transmission construction partnership with a major U.S.-based infrastructure services company. PJM Proposed Reforms In July 2026, the PJM Board approved near-term resource adequacy reforms intended to address projected reliability concerns associated with significant forecasted load growth and capacity shortages. The package directs PJM to seek FERC approval of a Reliability Backstop Procurement mechanism and an Interim Resource Adequacy Service for new large load customers that do not provide sufficient capacity resources to meet their resource adequacy needs. The reforms also include the creation of a Large Load Registry and new requirements for electric distribution utilities to provide information regarding certain large load interconnection requests. PJM expects to conduct a centralized procurement process beginning in September 2026. Fixed Resource Requirement entities are excluded from the Reliability Backstop Procurement targets and associated cost allocation. AEP's Fixed Resource Requirement operating companies within PJM also may be affected in their role as electric distribution utilities. Under the proposed framework, beginning June 1, 2027, electric distribution utilities would be required to administer an Interim Resource Adequacy Service for certain new large load customers that do not provide sufficient capacity resources to meet applicable reliability requirements. The proposal also requires electric distribution utilities to administer a FERC-approved compensation mechanism for qualifying large load customers that are directed to reduce their electricity consumption. The PJM proposal also includes provisions intended to mitigate impacts associated with a transmission owner's withdrawal from PJM. Under the proposal, a withdrawing transmission owner that participates in the Reliability Backstop Procurement program could be required to satisfy certain future obligations associated with resources procured through that program or charges allocated to load on an accelerated basis prior to withdrawal, or otherwise provide for continued payment of such obligations through the applicable commitment term. These provisions are intended to prevent costs associated with committed reliability resources from being shifted to remaining PJM participants. 4 PJM has not yet filed the proposal with the FERC, and the ultimate form of any approved tariff revisions, implementation requirements, cost recovery mechanisms and operational impacts remains uncertain. At this time, AEP cannot predict the outcome of the FERC proceeding or estimate the potential impact, if any, that any final approved provisions may have on its financial condition, results of operations or cash flows. AEP will continue to monitor the proceeding. Customer Demand AEP uses sales volumes by customer class as a way to measure drivers of customer demand. Through the first half of 2026, AEP experienced higher customer demand, driven primarily by new data processing load added in the commercial and industrial customer classes. This growth was partially offset by weather-related impacts in the residential class, including favorable weather in the first and second quarters of 2025 and normal weather through the first half of 2026. The table below shows the percentage change in sales volume by customer class. (a) Percentage change for the three months ended June 30, 2026 as compared to the three months ended June 30, 2025. Load figures are billed and accrued retail sales excluding firm wholesale load. (b) Percentage change for the six months ended June 30, 2026 as compared to the six months ended June 30, 2025. Load figures are billed and accrued retail sales excluding firm wholesale load. 5 New Generation Resources The growth of AEP’s regulated generation portfolio reflects the Company’s focus on meeting increasing customer demand for power while balancing cost and reliability. Acquired Generation Facilities In March 2026, I&M acquired the Oregon Clean Energy Center (Oregon Plant). In May 2026, APCo acquired the Grover Hill Wind Project (Grover Hill Wind). These transactions reflect the Companies’ focus on securing necessary generation to meet future customer demand. See the “Acquisitions” section of Note 6 for additional information. The table below summarizes these acquisitions: Company | | | Plant Name | | | Fuel Type | | | Location | | | Acquisition Date | | | Net Maximum Capacity (in MWs) I&M | | | Oregon Plant | | | Natural Gas | | | Oregon, OH | | | March 2026 | | | 870 APCo | | | Grover Hill Wind | | | Wind | | | Paulding County, OH | | | May 2026 | | | 143 Total Acquired Generation Facilities | | | | | | | 1,013

Coal-Fired Share of Owned Generation Capacity

38.5%

Active Significant Generation RFP Capacity

12.1K

Approved Owned Renewable and Storage Capacity Pipeline

884

Significant Approved Renewable Generation and Storage Filings AEP received approval from various state regulatory commissions to acquire approximately 884 MWs of owned renewable generation and storage facilities, totaling approximately $2.3 billion. The Financial Condition section below includes the estimated cost of these facilities in the Budgeted Capital Expenditures. In addition, AEP received approval from various state regulatory commissions for 924 MWs of renewable PPAs. The following table summarizes regulatory approvals received for active renewable projects that are not yet in service as of June 30, 2026: Company | | | Generation Type | | | Expected Commercial Operation | | | Owned/PPA | | | Generating Capacity (in MWs) APCo | | | Solar | | | 2026-2028 | | | PPA | | | 343 I&M | | | Wind | | | 2026-2030 | | | PPA | | | 401 I&M | | | Solar | | | 2027 | | | PPA | | | 180 I&M | | | Solar | | | 2029 | | | Owned | | | 245 PSO (a) | | | Wind | | | 2026 | | | Owned | | | 265 PSO (a) | | | Solar | | | 2027 | | | Owned | | | 150 PSO | | | BESS | | | 2027-2028 | | | Owned | | | 224 Total Approved Renewable Projects | | | | | 1,808 (a) PSO has one wind project and one solar project under construction.

Approved Renewable PPA Capacity Pipeline

924

Total Approved Renewable and Storage Capacity Pipeline

1.8K

AEP Texas Incremental Load Under Letters of Agreement

Large Load Interconnections in Texas In June 2025, Texas Senate Bill 6 (SB 6) became effective and was signed into law by the Governor of Texas. SB 6 establishes a standardized process for connecting large load customers within ERCOT in a manner intended to support economic development in Texas while reducing the potential for stranded infrastructure costs. The new legislation establishes criteria for new large load interconnections and directs the PUCT to ensure that these large load customers pay a reasonable share of allocated transmission costs. The PUCT continues its rulemaking efforts to implement SB 6, including provisions related to large load interconnection standards, load forecasting, reliability requirements and transmission cost allocation. AEP Texas has executed Letters of Agreement for approximately 45 gigawatts of incremental load by 2030, including approximately 40 gigawatts of prospective load seeking consideration under ERCOT’s Batch Zero process, a one-time transitional interconnection process established by ERCOT and approved by the PUCT in 2026. The ERCOT Batch Zero process is designed to evaluate qualifying large load interconnection requests on a system-wide basis, allocate available transmission capacity, identify necessary transmission upgrades and require financial commitments from participating customers. The process applies primarily to large electric loads of 75 MW or greater and serves as the precursor to ERCOT's future recurring batch interconnection framework. In July 2026, AEP Texas received approximately $2 billion of financial security in the form of cash collateral, corporate or parental guarantees and letters of credit for the 40 gigawatts of prospective load seeking consideration for participation in the Batch Zero process. ERCOT is expected to identify projects eligible for participation in Batch Zero, while the PUCT is expected to issue additional SB 6 rulemaking guidance in August 2026. ERCOT expects to provide load ramp information to eligible Batch Zero projects in April 2027, enabling large load customers to determine whether to proceed with an interconnection agreement and reserve its electric capacity. These activities are expected to provide greater clarity regarding large load interconnection requirements, transmission infrastructure needs and the timing and scale of future load growth. However, the amount, timing and cost responsibility associated with these prospective large load interconnections remain subject to ongoing ERCOT and PUCT actions.

T&D Eastern Region Actual Cooling Degree Days

309

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of Heating and Cooling Degree Days for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 88 | | | | 118 | | | | 1,663 | | | | 1,735 Normal – Heating 132 | | | | 133 | | | | 1,698 | | | | 1,700 Actual – Cooling 362 | | | | 374 | | | | 381 | | | | 382 Normal – Cooling 352 | | | | 348 | | | | 357 | | | | 352 Western Region Actual – Heating 2 | | | | 21 | | | | 632 | | | | 966 Normal – Heating 34 | | | | 34 | | | | 911 | | | | 903 Actual – Cooling 820 | | | | 772 | | | | 941 | | | | 831 Normal – Cooling 742 | | | | 738 | | | | 777 | | | | 771 Summary of Heating and Cooling Degree Days for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 132 | | | | 170 | | | | 1,996 | | | | 2,077 Normal – Heating 172 | | | | 173 | | | | 1,991 | | | | 1,993 Actual – Cooling 309 | | | | 336 | | | | 321 | | | | 342 Normal – Cooling 325 | | | | 323 | | | | 328 | | | | 325 Western Region Actual – Heating 1 | | | | 4 | | | | 144 | | | | 296 Normal – Heating 4 | | | | 4 | | | | 215 | | | | 208 Actual – Cooling 900 | | | | 992 | | | | 1,124 | | | | 1,153 Normal – Cooling 919 | | | | 909 | | | | 1,035 | | | | 1,021

T&D Eastern Region Actual Heating Degree Days

132

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of Heating and Cooling Degree Days for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 88 | | | | 118 | | | | 1,663 | | | | 1,735 Normal – Heating 132 | | | | 133 | | | | 1,698 | | | | 1,700 Actual – Cooling 362 | | | | 374 | | | | 381 | | | | 382 Normal – Cooling 352 | | | | 348 | | | | 357 | | | | 352 Western Region Actual – Heating 2 | | | | 21 | | | | 632 | | | | 966 Normal – Heating 34 | | | | 34 | | | | 911 | | | | 903 Actual – Cooling 820 | | | | 772 | | | | 941 | | | | 831 Normal – Cooling 742 | | | | 738 | | | | 777 | | | | 771 Summary of Heating and Cooling Degree Days for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 132 | | | | 170 | | | | 1,996 | | | | 2,077 Normal – Heating 172 | | | | 173 | | | | 1,991 | | | | 1,993 Actual – Cooling 309 | | | | 336 | | | | 321 | | | | 342 Normal – Cooling 325 | | | | 323 | | | | 328 | | | | 325 Western Region Actual – Heating 1 | | | | 4 | | | | 144 | | | | 296 Normal – Heating 4 | | | | 4 | | | | 215 | | | | 208 Actual – Cooling 900 | | | | 992 | | | | 1,124 | | | | 1,153 Normal – Cooling 919 | | | | 909 | | | | 1,035 | | | | 1,021

T&D Western Region Actual Cooling Degree Days

900

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of Heating and Cooling Degree Days for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 88 | | | | 118 | | | | 1,663 | | | | 1,735 Normal – Heating 132 | | | | 133 | | | | 1,698 | | | | 1,700 Actual – Cooling 362 | | | | 374 | | | | 381 | | | | 382 Normal – Cooling 352 | | | | 348 | | | | 357 | | | | 352 Western Region Actual – Heating 2 | | | | 21 | | | | 632 | | | | 966 Normal – Heating 34 | | | | 34 | | | | 911 | | | | 903 Actual – Cooling 820 | | | | 772 | | | | 941 | | | | 831 Normal – Cooling 742 | | | | 738 | | | | 777 | | | | 771 Summary of Heating and Cooling Degree Days for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 132 | | | | 170 | | | | 1,996 | | | | 2,077 Normal – Heating 172 | | | | 173 | | | | 1,991 | | | | 1,993 Actual – Cooling 309 | | | | 336 | | | | 321 | | | | 342 Normal – Cooling 325 | | | | 323 | | | | 328 | | | | 325 Western Region Actual – Heating 1 | | | | 4 | | | | 144 | | | | 296 Normal – Heating 4 | | | | 4 | | | | 215 | | | | 208 Actual – Cooling 900 | | | | 992 | | | | 1,124 | | | | 1,153 Normal – Cooling 919 | | | | 909 | | | | 1,035 | | | | 1,021

T&D Western Region Actual Heating Degree Days

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of Heating and Cooling Degree Days for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 88 | | | | 118 | | | | 1,663 | | | | 1,735 Normal – Heating 132 | | | | 133 | | | | 1,698 | | | | 1,700 Actual – Cooling 362 | | | | 374 | | | | 381 | | | | 382 Normal – Cooling 352 | | | | 348 | | | | 357 | | | | 352 Western Region Actual – Heating 2 | | | | 21 | | | | 632 | | | | 966 Normal – Heating 34 | | | | 34 | | | | 911 | | | | 903 Actual – Cooling 820 | | | | 772 | | | | 941 | | | | 831 Normal – Cooling 742 | | | | 738 | | | | 777 | | | | 771 Summary of Heating and Cooling Degree Days for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 132 | | | | 170 | | | | 1,996 | | | | 2,077 Normal – Heating 172 | | | | 173 | | | | 1,991 | | | | 1,993 Actual – Cooling 309 | | | | 336 | | | | 321 | | | | 342 Normal – Cooling 325 | | | | 323 | | | | 328 | | | | 325 Western Region Actual – Heating 1 | | | | 4 | | | | 144 | | | | 296 Normal – Heating 4 | | | | 4 | | | | 215 | | | | 208 Actual – Cooling 900 | | | | 992 | | | | 1,124 | | | | 1,153 Normal – Cooling 919 | | | | 909 | | | | 1,035 | | | | 1,021

VIU Eastern Region Actual Cooling Degree Days

362

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of Heating and Cooling Degree Days for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 88 | | | | 118 | | | | 1,663 | | | | 1,735 Normal – Heating 132 | | | | 133 | | | | 1,698 | | | | 1,700 Actual – Cooling 362 | | | | 374 | | | | 381 | | | | 382 Normal – Cooling 352 | | | | 348 | | | | 357 | | | | 352 Western Region Actual – Heating 2 | | | | 21 | | | | 632 | | | | 966 Normal – Heating 34 | | | | 34 | | | | 911 | | | | 903 Actual – Cooling 820 | | | | 772 | | | | 941 | | | | 831 Normal – Cooling 742 | | | | 738 | | | | 777 | | | | 771 Summary of Heating and Cooling Degree Days for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 132 | | | | 170 | | | | 1,996 | | | | 2,077 Normal – Heating 172 | | | | 173 | | | | 1,991 | | | | 1,993 Actual – Cooling 309 | | | | 336 | | | | 321 | | | | 342 Normal – Cooling 325 | | | | 323 | | | | 328 | | | | 325 Western Region Actual – Heating 1 | | | | 4 | | | | 144 | | | | 296 Normal – Heating 4 | | | | 4 | | | | 215 | | | | 208 Actual – Cooling 900 | | | | 992 | | | | 1,124 | | | | 1,153 Normal – Cooling 919 | | | | 909 | | | | 1,035 | | | | 1,021

VIU Eastern Region Actual Heating Degree Days

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of Heating and Cooling Degree Days for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 88 | | | | 118 | | | | 1,663 | | | | 1,735 Normal – Heating 132 | | | | 133 | | | | 1,698 | | | | 1,700 Actual – Cooling 362 | | | | 374 | | | | 381 | | | | 382 Normal – Cooling 352 | | | | 348 | | | | 357 | | | | 352 Western Region Actual – Heating 2 | | | | 21 | | | | 632 | | | | 966 Normal – Heating 34 | | | | 34 | | | | 911 | | | | 903 Actual – Cooling 820 | | | | 772 | | | | 941 | | | | 831 Normal – Cooling 742 | | | | 738 | | | | 777 | | | | 771 Summary of Heating and Cooling Degree Days for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 132 | | | | 170 | | | | 1,996 | | | | 2,077 Normal – Heating 172 | | | | 173 | | | | 1,991 | | | | 1,993 Actual – Cooling 309 | | | | 336 | | | | 321 | | | | 342 Normal – Cooling 325 | | | | 323 | | | | 328 | | | | 325 Western Region Actual – Heating 1 | | | | 4 | | | | 144 | | | | 296 Normal – Heating 4 | | | | 4 | | | | 215 | | | | 208 Actual – Cooling 900 | | | | 992 | | | | 1,124 | | | | 1,153 Normal – Cooling 919 | | | | 909 | | | | 1,035 | | | | 1,021

VIU Western Region Actual Cooling Degree Days

820

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of Heating and Cooling Degree Days for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 88 | | | | 118 | | | | 1,663 | | | | 1,735 Normal – Heating 132 | | | | 133 | | | | 1,698 | | | | 1,700 Actual – Cooling 362 | | | | 374 | | | | 381 | | | | 382 Normal – Cooling 352 | | | | 348 | | | | 357 | | | | 352 Western Region Actual – Heating 2 | | | | 21 | | | | 632 | | | | 966 Normal – Heating 34 | | | | 34 | | | | 911 | | | | 903 Actual – Cooling 820 | | | | 772 | | | | 941 | | | | 831 Normal – Cooling 742 | | | | 738 | | | | 777 | | | | 771 Summary of Heating and Cooling Degree Days for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 132 | | | | 170 | | | | 1,996 | | | | 2,077 Normal – Heating 172 | | | | 173 | | | | 1,991 | | | | 1,993 Actual – Cooling 309 | | | | 336 | | | | 321 | | | | 342 Normal – Cooling 325 | | | | 323 | | | | 328 | | | | 325 Western Region Actual – Heating 1 | | | | 4 | | | | 144 | | | | 296 Normal – Heating 4 | | | | 4 | | | | 215 | | | | 208 Actual – Cooling 900 | | | | 992 | | | | 1,124 | | | | 1,153 Normal – Cooling 919 | | | | 909 | | | | 1,035 | | | | 1,021

VIU Western Region Actual Heating Degree Days

Heating Degree Days and Cooling Degree Days Heating degree days and cooling degree days are metrics commonly used in the utility industry as a measure of the impact of weather on revenues. In general, degree day changes in the Eastern Region have a larger effect on revenues than changes in the Western Region due to the relative size of the two regions and the number of customers within each region. The actual heating degree days are calculated on a 55-degree temperature base and the actual cooling degree days are calculated on a 65-degree temperature base for Registrant Subsidiaries except AEP Texas. AEP Texas’ actual heating degree days are calculated on a 55-degree temperature base and actual cooling degree days are calculated on a 70-degree temperature base. 19 VERTICALLY INTEGRATED UTILITIES Summary of KWh Energy Sales for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in millions of KWhs) Retail: Residential | | | 6,443 | | | | 6,372 | | | | 15,316 | | | | 15,776 Commercial | | | 7,238 | | | | 6,297 | | | | 14,065 | | | | 12,193 Industrial | | | 8,584 | | | | 8,595 | | | | 16,582 | | | | 16,696 Miscellaneous | | | 567 | | | | 569 | | | | 1,101 | | | | 1,102 Total Retail | | | 22,832 | | | | 21,833 | | | | 47,064 | | | | 45,767 Wholesale (a) | | | 3,550 | | | | 3,443 | | | | 7,095 | | | | 8,234 Total KWhs | | | 26,382 | | | | 25,276 | | | | 54,159 | | | | 54,001 (a) Includes off-system sales, municipalities and cooperatives, unit power and other wholesale customers. Summary of Heating and Cooling Degree Days for Vertically Integrated Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 88 | | | | 118 | | | | 1,663 | | | | 1,735 Normal – Heating 132 | | | | 133 | | | | 1,698 | | | | 1,700 Actual – Cooling 362 | | | | 374 | | | | 381 | | | | 382 Normal – Cooling 352 | | | | 348 | | | | 357 | | | | 352 Western Region Actual – Heating 2 | | | | 21 | | | | 632 | | | | 966 Normal – Heating 34 | | | | 34 | | | | 911 | | | | 903 Actual – Cooling 820 | | | | 772 | | | | 941 | | | | 831 Normal – Cooling 742 | | | | 738 | | | | 777 | | | | 771 Summary of Heating and Cooling Degree Days for Transmission and Distribution Utilities Three Months Ended June 30, | | | Six Months Ended June 30, 2026 | | | 2025 | | | 2026 | | | 2025 (in degree days) Eastern Region Actual – Heating 132 | | | | 170 | | | | 1,996 | | | | 2,077 Normal – Heating 172 | | | | 173 | | | | 1,991 | | | | 1,993 Actual – Cooling 309 | | | | 336 | | | | 321 | | | | 342 Normal – Cooling 325 | | | | 323 | | | | 328 | | | | 325 Western Region Actual – Heating 1 | | | | 4 | | | | 144 | | | | 296 Normal – Heating 4 | | | | 4 | | | | 215 | | | | 208 Actual – Cooling 900 | | | | 992 | | | | 1,124 | | | | 1,153 Normal – Cooling 919 | | | | 909 | | | | 1,035 | | | | 1,021