8-K: Pinnacle West Q3 Earnings Rise, 2025 Outlook Boosted

Pinnacle West Capital Corp. reported increased third-quarter net income and raised its 2025 earnings guidance, driven by robust customer growth and strong retail sales in Arizona.

Summary

• Consolidated net income attributable to common shareholders for Q3 2025 was $413.2 million, or $3.39 per diluted share, up from $395.0 million, or $3.37 per share, in Q3 2024.
• Year-to-date 2025 earnings were 2.4% lower than the first nine months of 2024.
• Q3 2025 results benefited from increased customer usage, 2.4% customer growth, 5.4% weather-normalized sales growth, higher transmission service revenues, lower operations and maintenance expenses, higher AFUDC, and lower depreciation and amortization.
• These positives were partially offset by unfavorable weather effects compared to Q3 2024, higher interest charges, lower pension and other post-retirement non-service credits, and higher income taxes.
• Arizona Public Service (APS) customers set an all-time record peak demand of 8,631 megawatts (MW) on August 7, 2025.
• APS plans to invest over $2.5 billion annually through 2028 for infrastructure additions and upgrades.
• A proposed natural gas power plant, the Desert Sun Power Plant near Gila Bend, Arizona, is planned to add up to 2,000 MW of generation, with Phase One expected by late-2030.
• The company is expanding community support with an additional $3 million in shareholder funds for utility bill assistance and other programs, bringing total heat relief support since 2021 to $6.1 million.
• Pinnacle West adjusted its 2025 consolidated earnings guidance upward to a range of $4.90 to $5.10 per diluted share.
• The company estimates its 2026 consolidated earnings will be within a range of $4.55 to $4.75 per diluted share on a weather-normalized basis.

Sentiment

Score: 8

Explanation: The company reported strong Q3 financial results with increased net income and diluted EPS, driven by robust customer growth and sales. The upward revision of 2025 earnings guidance signals confidence. Significant planned infrastructure investments, including a new 2,000 MW power plant, address the rapid growth in Arizona, a top-ranked economic development region. While year-to-date earnings are slightly lower and 2026 guidance is below 2025, the overall strategic direction, operational performance, and commitment to community support present a very positive outlook.

Positives

• Consolidated net income attributable to common shareholders increased to $413.2 million in Q3 2025 from $395.0 million in Q3 2024.
• Diluted earnings per share rose to $3.39 in Q3 2025 from $3.37 in Q3 2024.
• Customer growth was robust at 2.4% during the quarter, driven by Arizona's rapid population and economic expansion.
• Weather-normalized retail sales growth reached 5.4% in Q3 2025, with residential sales growth of 4.3%.
• Arizona Public Service (APS) customers set an all-time record peak demand of 8,631 megawatts (MW) on August 7, 2025, demonstrating strong demand for electricity.
• Operating performance and customer reliability remained strong, with the diverse generation fleet performing well.
• Operations and maintenance expenses decreased in Q3 2025 to $299.6 million from $308.1 million in Q3 2024.
• Depreciation and amortization expenses decreased in Q3 2025 to $224.6 million from $229.5 million in Q3 2024, partly due to Cholla operations ceasing.
• The 2025 consolidated earnings guidance was adjusted upward to a range of $4.90 to $5.10 per diluted share.
• APS intends to invest more than $2.5 billion annually through 2028 for infrastructure additions and upgrades.
• Plans for a proposed natural gas power plant, the Desert Sun Power Plant, capable of adding up to 2,000 MW of reliable and flexible generation, with Phase One by late-2030.
• Expanded community support efforts by granting an additional $3 million in shareholder funds to nonprofit organizations for utility bill assistance and other programs.
• Maricopa County was named the top U.S. region for economic development by Site Selection Magazine, and Phoenix is among the top 20 tech markets in North America.
• The company maintains healthy investment-grade credit ratings (APS: Baa1/BBB+/BBB+; Pinnacle West: Baa2/BBB+/BBB).
• Optimized financing plan supports a balanced capital structure and expanded capital investment.

Negatives

• Earnings through the first three quarters of 2025 were 2.4% lower than in the first nine months of 2024.
• Unfavorable weather effects compared to the record-setting Q3 2024 partially offset positive factors.
• Higher interest charges, increasing to $125.2 million in Q3 2025 from $109.9 million in Q3 2024.
• Lower pension and other post-retirement non-service credits, net, decreasing to $2.8 million in Q3 2025 from $12.2 million in Q3 2024.
• Higher income taxes due to higher pre-tax income and lower tax credits.
• The estimated 2026 consolidated earnings guidance of $4.55 to $4.75 per diluted share is lower than the updated 2025 guidance of $4.90 to $5.10.
• Higher than previously forecasted operations and maintenance expenses partially offset positive customer and sales growth for the 2025 guidance adjustment.

Risks

• Uncertainties associated with the current and future economic environment, including economic growth rates, labor market conditions, tariffs, inflation, supply chain delays, increased expenses, volatile capital markets, or other unpredictable effects.
• Current and future economic conditions in Arizona, such as the housing market and overall business and regulatory environment.
• Ability to manage capital expenditures and operations and maintenance costs while maintaining reliability and customer service levels.
• Ability to meet current and anticipated future needs for generation and associated transmission facilities in our region, including due to unprecedented demand from high load customers.
• The direct or indirect effect on our facilities or business from cybersecurity threats or intrusions, data security breaches, terrorist attack, physical attack, severe storms, or other catastrophic events, such as fires, explosions, pandemic health events, or similar occurrences.
• Variations in demand for electricity, including those due to weather, seasonality (including large increases in ambient temperatures), the general economy or social conditions, customer and sales growth (or decline), the effects of energy conservation measures and distributed generation, and technological advancements.
• The potential effects of climate change on our electric system, including as a result of weather extremes, such as prolonged drought and high temperature variations in the area where APS conducts its business.
• Power plant and transmission system performance and outages.
• Competition in retail and wholesale power markets.
• Regulatory and judicial decisions, developments, and proceedings.
• New legislation, ballot initiatives, and regulation or interpretations of existing legislation or regulations, including those relating to tax, environmental requirements, regulatory and energy policy, nuclear plant operations, and potential deregulation of retail electric markets.
• Fuel and water supply availability.
• Ability to achieve timely and adequate rate recovery of costs through rates and adjustor recovery mechanisms, including returns on and of debt and equity capital investment.
• Ability to meet renewable energy and energy efficiency mandates and recover related costs.
• Ability to achieve clean energy goal to be carbon-neutral by 2050 and, if this goal is achieved, the impact of such achievement on us, our customers, and our business, financial condition, and results of operations.
• Risks inherent in the operation of nuclear facilities, including spent fuel disposal uncertainty.
• The development of new technologies which may affect electric sales or delivery, including as a result of delays in the development and application of new technologies.
• The cost of debt, including increased cost as a result of rising interest rates, and equity capital and ability to access capital markets when required.
• Environmental, economic, and other concerns surrounding coal-fired generation, including regulation of greenhouse gas emissions (GHG).
• Volatile fuel and purchased power costs.
• The investment performance of the assets of nuclear decommissioning trust, captive insurance cell, coal mine reclamation escrow, pension, and other postretirement benefit plans, and the resulting impact on future funding requirements.
• The liquidity of wholesale power markets and the use of derivative contracts in business.
• Potential shortfalls in insurance coverage.
• New accounting requirements or new interpretations of existing requirements.
• Generation, transmission, and distribution facilities and system conditions and operating costs.
• The willingness or ability of counterparties, power plant participants, and power plant landowners to meet contractual or other obligations or extend the rights for continued power plant operations.
• Restrictions on dividends or other provisions in credit agreements and Arizona Corporation Commission (ACC) orders.

Future Outlook

Pinnacle West adjusted its 2025 consolidated earnings guidance upward to a range of $4.90 to $5.10 per diluted share. The company estimates its 2026 consolidated earnings will be within a range of $4.55 to $4.75 per diluted share on a weather-normalized basis. A long-term EPS growth target of 5%-7% off the original 2024 midpoint is maintained. APS intends to invest more than $2.5 billion annually through 2028 for infrastructure additions and upgrades. Plans include a proposed natural gas power plant, the Desert Sun Power Plant, capable of adding up to 2,000 MW, with Phase One expected to enter service by late-2030. Retail customer growth is projected at 1.5%-2.5% for 2026, and weather-normalized retail electricity sales growth is expected to be 4.0%-6.0% for 2026 and 5%-7% through 2030. The company is focused on cost control, aiming for core operations and maintenance expenses to remain flat with a rapidly growing customer base. An optimized financing plan is in place to support a balanced capital structure and expanded, accretive capital investment, while maintaining solid investment-grade credit ratings. Significant additional load opportunities, including approximately 20 GW of uncommitted load, are being prepared for. Transmission expansion is expected to drive over $6 billion in cumulative capital expenditures between 2025 and 2034.

Management Comments

• "Driven by one of the fastest-growing service territories in the country and the third-hottest Arizona summer on record, we experienced an increase in retail sales that helped contribute to solid third-quarter financial results." Ted Geisler, Chairman, President and Chief Executive Officer.
• "Our employees continued to do what they do best: maintaining reliable electric service for our 1.4 million customers." Ted Geisler.
• "Our diverse generation fleet — including critical baseload generating plants like Palo Verde and Four Corners — performed well, ensuring we met our customers energy needs." Ted Geisler.
• "As more people and businesses choose to move to Arizona, the company remains focused on delivering safe, reliable and resilient energy to power the states future — supporting customers, communities and the economy, alike." Ted Geisler.
• "Natural gas plays a vital role in providing around-the-clock reliability, especially during peak hours when solar and wind resources are unavailable." Ted Geisler.
• "While summer has ended and temperatures have begun to cool off, some of our customers continue to face economic hardships that make it a challenge to pay their bills or make repairs to vital heating and cooling equipment. As a result, we are partnering with community nonprofits that can provide much-needed assistance directly to our customers who need it most." Ted Geisler.
• "By investing in both infrastructure and community partnerships, APS is helping power Arizona now and into the future." Ted Geisler.

Industry Context

Arizona, particularly Maricopa County, is experiencing rapid population and economic growth, ranking among the highest in the U.S. for population gains and as the top U.S. region for economic development. Phoenix is noted for its tech momentum and advanced manufacturing boom, placing it among the top 20 tech markets in North America and the #1 best-positioned industrial real estate market. This growth is driving unprecedented energy demand, including from extra-large energy users like data centers and manufacturers, necessitating significant infrastructure investment and new generation capacity. The company emphasizes the critical role of natural gas in providing around-the-clock reliability, especially when intermittent solar and wind resources are unavailable, aligning with broader industry discussions on energy transition and grid stability. The expansion of community support and utility bill assistance programs reflects an industry trend of addressing customer affordability and economic hardships, particularly after periods of high energy consumption.

Comparison to Industry Standards

• Maricopa County was ranked the top U.S. region for economic development by Site Selection Magazine in 2025.
• The U.S. Census Bureau ranked Maricopa County third among U.S. counties for population growth since 2016.
• Phoenix is listed among the top 20 tech markets in North America, according to CBRE's 2025 Scoring Tech Talent Report.
• Phoenix is ranked #1 as the best-positioned industrial real estate market by Commercial Caf Report.
• Arizona State University was ranked #1 in Innovation for the 11th straight year by U.S. News and World Report.
• Phoenix housing is considered affordable compared to major cities in the region.
• APS's residential customer growth of 2.4% in Q3 2025 compares favorably to the national average residential growth of 2.0% from the 2025 Itron Annual Energy Survey Report.

Corporate Governance

Legal Proceedings

• 2025 APS rate case application (Docket number: E-01345A-25-0105) is ongoing, with testimony and hearings scheduled through Q4 2026.
• Power Supply Adjustor (PSA) proceedings (E-01345A-22-0144) for rate resets.
• Transmission Cost Adjustor proceedings (E-01345A-22-0144) for rate adjustments.
• Lost Fixed Cost Recovery (LFCR) proceedings (E-01345A-25-0155) for annual filings and approvals.
• ACC Inquiry Into Nuclear Issues (E-00000A-25-0026), including workshops.
• Resource Comparison Proxy (RCP) proceedings (E-01345A-25-0093) for updated calculations.
• Test Year Rules (Regulatory Lag) (AU-00000A-23-0012), related to the ACC's adopted Formula Rates Policy Statement.
• 2026 Renewable Energy Standard (RES) Implementation Plan (E-01345A-25-0140) and 2026 Demand Side Management (DSM) Implementation Plan (E-01345A-25-0106) filings.
• ACC Inquiry Into Natural Gas Infrastructure (G-00000A-25-0029), including workshops.
• ACC Inquiry Into Data Center Rate Classifications (E-00000A-25-0069).

Stakeholder Impact

• Shareholders: Directly impacted by the positive Q3 financial results, the upward revision of 2025 earnings guidance, and the long-term growth strategy, as well as the planned equity raise.
• Customers (Residential and Business): Benefit from continued reliable electric service, significant infrastructure investments to meet growing demand, and expanded community programs offering utility bill assistance. They will also be affected by proposed rate case changes and the "growth pays for growth" strategy for extra-large users.
• Employees: The company's strong operating performance and commitment to maintaining reliable service imply stable employment and continued focus on operational excellence.
• Communities: Benefit from the company's expanded community support efforts, including $3 million in additional shareholder funds for nonprofits providing essential assistance.
• Extra-Large Energy Users (e.g., data centers, manufacturers): Targeted by specific infrastructure investments like Phase Two of the Desert Sun Power Plant, which will be paid for through a proposed subscription model, ensuring they bear the costs of their high energy demands.

Next Steps

• APS intends to invest more than $2.5 billion annually through 2028 for infrastructure additions and upgrades.
• The proposed Desert Sun Power Plant's Phase One is expected to enter service by late-2030.
• A conference call and webcast to discuss financial results and outlook was held on November 3, 2025.
• For the 2025 Rate Case (E-01345A-25-0105), Staff and Intervenor Direct Testimony are due March 2 and March 18, 2026, respectively, with APS Rebuttal Testimony due April 3, 2026.
• The 2025 Rate Case hearing is scheduled to begin May 18, 2026, with a Final Decision expected in Q4 2026.
• The Power Supply Adjustor (PSA) reset is to be filed on November 26, 2025, with a new rate effective March 1, 2026.
• The Transmission Cost Adjustor is to be filed on May 15, 2026, for a June 1, 2026, effective date.
• The 2026 Lost Fixed Cost Recovery (LFCR) is to be filed on July 31, 2026, with an expected effective date of November 1, 2026 (if approved).
• An updated Resource Comparison Proxy (RCP) calculation is to be filed on May 1, 2026, effective September 1, 2026.
• The 2027 Renewable Energy Standard (RES) Implementation Plan is to be filed on July 1, 2026.
• The 2026 Demand Side Management (DSM) Implementation Plan is to be filed (date TBD).
• A second ACC Nuclear Issues workshop is to be held (date TBD).
• A new gas pipeline, supporting the Desert Sun Power Plant, is expected to be in service by late 2029.
• Sundance Expansion (90 MW) and Ironwood Solar (168 MW) projects are expected to enter service in 2026.
• The Redhawk Expansion (397 MW) project is expected to enter service in 2028.
• Major transmission projects, including Sundance to Milligan (~23 mi/230kV) by 2027, Pinnacle Peak to Ocotillo (~100 mi/230kV) by 2029, and Cotton Transmission Corridor projects by 2030 and 2032, are in development.

Key Dates

Recommendation

Pinnacle West Capital Corporation delivered strong third-quarter results, exceeding prior year performance and prompting an upward revision of its 2025 earnings guidance. The company operates in a high-growth service territory, Arizona, which is experiencing significant population and economic expansion, particularly in tech and advanced manufacturing. This growth underpins robust customer additions and sales, driving substantial planned infrastructure investments of over $2.5 billion annually through 2028, including a major new natural gas power plant. While 2026 guidance is lower, this is often a function of regulatory cycles and specific one-off items, and the long-term EPS growth target of 5%-7% remains attractive. The company's proactive capital planning, commitment to reliability, and strong credit ratings position it well for sustained growth and shareholder value creation in a critical utility market.

Keywords

Pinnacle West Capital Corporation, Arizona Public Service Company, PNW, Utility, Electric Power, Q3 2025 Earnings, Financial Results, EPS Guidance, Customer Growth, Retail Sales, Infrastructure Investment, Natural Gas Power Plant, Desert Sun Power Plant, Arizona Economy, SEC Filing, 8-K, Energy Demand, Rate Case, Capital Expenditures, Renewable Energy, Corporate Governance, Risk Management