What Changed
Price Move History
- Daily moves over 5%
- 0 252 sessions, September 25, 2025 to September 25, 2026
- Largest daily move
- -2.9% close of July 29, 2026
- 1-year change
- +6.6% closing prices, September 25, 2025 to September 25, 2026
- 5-year change
- +26.5% closing prices, September 24, 2021 to September 25, 2026
Company Description
Pinnacle West Capital Corporation (NYSE: PNW) is an energy holding company based in Phoenix, Arizona. According to company disclosures and recent news releases, it has consolidated assets measured in the tens of billions of dollars, approximately 6,500 megawatts of generating capacity and thousands of employees in Arizona and New Mexico. Its principal subsidiary is Arizona Public Service Company (APS), which provides retail electricity service to about 1.4 million homes and businesses in Arizona.
Core business and utility operations
Pinnacle West’s primary business is conducted through APS, a vertically integrated electric utility. APS serves customers in multiple Arizona counties and delivers electricity across a large service territory that includes the Phoenix metropolitan area. The company’s generating capacity is supported by a diverse fleet of resources, and APS describes its energy mix as including nuclear power from the Palo Verde Generating Station, natural gas, coal, solar, wind and energy storage resources.
APS reports that its energy portfolio is more than half supplied by clean resources, with clean energy accounting for about 54% of its total energy mix. Nuclear generation from Palo Verde is highlighted as a foundational, carbon-free resource that operates around the clock and supplies a significant portion of Arizona’s electricity. Coal and natural gas provide additional baseload and flexible capacity, while solar, wind and storage contribute to meeting demand and supporting clean energy objectives.
Nuclear and clean energy profile
Pinnacle West’s industry classification includes nuclear electric power generation, and APS holds an ownership interest in Palo Verde Generating Station, which is described in company communications as one of the nation’s largest energy producers. Palo Verde has been in operation for decades and has operating licenses extending into the mid-2040s. APS emphasizes Palo Verde’s role in supplying reliable, carbon-free energy and supporting a strong regional grid.
APS has stated an aspirational goal to be carbon-neutral by 2050. The company has also indicated that it is updating its clean energy goals from a zero-carbon framing to a carbon-neutral approach, with an emphasis on balancing reliability and affordability. Clean resources, including nuclear and renewables, are combined with dispatchable resources such as natural gas to meet customer needs during periods when solar and wind output is limited.
Service territory and demand growth
Through APS, Pinnacle West serves approximately 1.4 million residential and business customers in Arizona. APS reports serving customers in 11 of Arizona’s 15 counties and notes that its service area includes some of the fastest-growing regions in the United States. Company news releases describe robust customer growth and sales growth, driven in part by population increases, economic development and high summer temperatures that elevate electricity usage.
APS has reported multiple years of record peak demand, with new all-time peak loads set during recent summers. These records are attributed to strong customer growth and high temperatures. To address this growth, APS plans infrastructure investments and resource additions, including new generation projects and transmission and distribution upgrades, as outlined in company announcements.
Generation mix and planned investments
APS describes its energy portfolio as a balanced mix that includes:
- Nuclear generation from Palo Verde Generating Station.
- Natural gas plants that provide flexible, on-demand capacity, particularly during peak hours and extreme temperatures.
- Coal resources that contribute baseload capacity, with some changes over time such as operations ceasing at certain plants like Cholla, as referenced in financial discussions.
- Solar and wind resources that contribute renewable energy to the grid.
- Energy storage resources that help integrate renewables and support reliability.
APS has discussed plans to add thousands of megawatts of new resources over a multi-year period to support Arizona’s rapid growth and maintain service during high-demand conditions. Company communications describe projects scheduled to come online in future years, including APS-owned resources and a proposed natural gas facility known as the Desert Sun Power Plant near Gila Bend, Arizona. This plant is described as a two-phase project intended to add up to 2,000 megawatts of reliable, flexible generation to the system, with a subscription model for extra-large energy users in one of the phases.
Regulated utility context and financial profile
Pinnacle West is a regulated utility holding company whose common stock trades on the New York Stock Exchange under the symbol PNW. The company provides regular financial updates through quarterly earnings releases and associated investor presentations, which are referenced in its Form 8-K filings. These materials discuss factors affecting results, such as weather, customer growth, operations and maintenance expenses, depreciation, interest costs and tax items.
Company disclosures highlight that Pinnacle West and APS are subject to regulatory oversight, including rate-setting and other decisions that affect cost recovery and returns on capital investment. The company also outlines a variety of risks and uncertainties in its public filings, including economic conditions in Arizona, fuel and water supply availability, regulatory and legislative developments, climate and weather-related impacts, nuclear operations, and capital market conditions.
Dividend and capital structure
Pinnacle West’s board of directors regularly declares quarterly dividends on its common stock, as documented in multiple news releases. These announcements specify the per-share dividend amount, record date and payment date. The company also engages in capital markets transactions, including the issuance of notes and the use of forward sale agreements, as described in its Form 8-K filings related to underwriting agreements, supplemental indentures and amendments to forward sale arrangements.
Through these financing activities, Pinnacle West supports its capital expenditure plans for generation, transmission and distribution infrastructure, while also maintaining its dividend policy. The company’s filings and press releases provide details on specific offerings and agreements, as well as references to its shelf registration statements.
Community, customer programs and assistance
In addition to its core utility operations, APS and Pinnacle West describe a range of customer and community-focused programs. APS references demand-side management, energy efficiency and renewable energy programs designed to help customers manage energy use and reduce overall demand. These initiatives are presented as part of APS’s broader growth strategy and its approach to supporting clean energy development.
APS also outlines multiple customer assistance programs aimed at helping households manage bills and maintain service during periods of financial stress or extreme weather. These include rate plan options, billing programs and financial assistance offerings for eligible customers. APS partners with numerous community organizations and nonprofits across Arizona to provide utility bill assistance, air conditioner repair and replacement, housing support and heat relief services, as described in company communications.
Strategic themes and risk considerations
Pinnacle West’s public statements emphasize several ongoing themes:
- Reliability and resiliency of the electric grid amid rapid customer and load growth.
- Affordability for residential and business customers, including approaches such as having extra-large users fund certain infrastructure under a “growth pays for growth” model.
- Balanced energy mix that combines clean resources with dispatchable generation to meet demand in all conditions.
- Long-term planning for generation, transmission and fuel supply, including participation in natural gas pipeline expansion projects.
The company’s SEC filings list numerous risk factors that could affect operations and financial results, including weather variability, economic trends, regulatory and judicial decisions, environmental requirements, nuclear facility risks, fuel and purchased power costs, and the performance of assets in various trusts and benefit plans.
Position within the utilities sector
Within the utilities sector, Pinnacle West is focused on electric service in the Southwest, primarily through APS’s operations in Arizona. Its business model centers on regulated electric utility activities, including generation, transmission and distribution, supported by a mix of nuclear, fossil and renewable resources. The company’s disclosures underscore its role in meeting the energy needs of a fast-growing region while managing regulatory, environmental and operational considerations.
Frequently asked questions (FAQ)
The following questions and answers summarize key aspects of Pinnacle West Capital Corporation based on its public statements and filings.
Stock Performance
Pinnacle West Capital Corporation (PNW) closed at $91.74 on September 25, 2026. Over the past 12 months, the price has gained 6.6%.
PNW Metrics & Rankings
Price returns through September 25, 2026. Month-to-date and YTD include the first trading day. Ranking links may use different dates.
Latest News
Pinnacle West Capital Corporation has 10 recent news articles. Of the recent coverage, 5 articles coincided with positive price movement and 5 with negative movement. Key topics include earnings, conferences, earnings date, dividends. View all PNW news →
SEC Filings
Pinnacle West Capital Corporation has filed 10 recent SEC filings, including 3 Form 8-K, 2 Form 4, 2 Form 144, 1 Form SCHEDULE 13G. The most recent filing was submitted on September 4, 2026. SEC filings provide transparency into a company's financial condition, material events, and regulatory compliance. View all PNW SEC filings →
Insider Radar
Insider selling at Pinnacle West Capital Corporation over the past 90 days can reflect routine portfolio management, scheduled trading plans (Rule 10b5-1), tax planning, or compensation-related dispositions rather than a directional view on the stock.
Financial Highlights
Pinnacle West Capital Corporation generated $5.3B in revenue in FY2025, retaining a 63.8% gross margin, operating income reached $1.1B (20.0% operating margin), and net income was $631.6M, reflecting a 11.8% net profit margin. Diluted earnings per share stood at $5.05. The company generated $1.8B in operating cash flow. With a current ratio of 0.54, short-term liquidity bears monitoring.
Upcoming Events
Construction begins
Operations begin
Cholla units conversion
Pipeline in-service
Phase 1 service start
Pinnacle West Capital Corporation has 5 upcoming scheduled events. The next event, "Construction begins", is scheduled for January 1, 2028 (in 461 days). Investors can track these dates to stay informed about potential catalysts that may affect the PNW stock price.
Short Interest History
Short interest in Pinnacle West Capital Corporation (PNW) currently stands at 9.7 million shares, up 18.1% from the previous reporting period, representing 8.1% of the float. Since September 2025, short interest has increased by 89.4%. The 9.7 days to cover indicates moderate liquidity for short covering.
Days to Cover History
Days to cover for Pinnacle West Capital Corporation (PNW) currently stands at 9.7 days, up 33.3% from the previous period. This moderate days-to-cover ratio suggests reasonable liquidity for short covering, requiring about a week of average trading volume. The days to cover has increased 107.3% over the past year, indicating either rising short interest or declining trading volume. The ratio has shown significant volatility over the period, ranging from 3.1 to 9.7 days.
PNW Company Profile & Sector Positioning
Pinnacle West Capital Corporation (PNW) operates in the Utilities - Regulated Electric industry within the broader Utilities sector and is listed on the NYSE. Among dividend-paying stocks, PNW ranks #824 by dividend yield.
Investors comparing PNW often look at related companies in the same sector, including Oklo Inc. (OKLO), Evergy, Inc. (EVRG), Alliant Energy Corporation (LNT), Edison International (EIX), and Korea Electric Power Corp (KEP). Comparing financial metrics, valuation ratios, and stock performance across these peers can help investors evaluate PNW's relative position within its industry.