* The 5-Year EBITDA Growth Rate is the 5-year average EBITDA per share growth rate. While the denominator is a percentage, we use the whole number as opposed to the decimal form for the calculation. For example, 5% would be shown as 5 as opposed to 0.05. If it's smaller than or equal to 0, then the PEG Ratio is not calculated.
The historical rank and industry rank for Pinnacle West Capital's PEG Ratio or its related term are showing as below:
STU:PWC'
s PEG Ratio Range Over the Past 10 Years
Min: 2.84 Med: 8.21 Max: 26.79
Current: 4.09
During the past 13 years, Pinnacle West Capital's highest PEG Ratio was 26.79. The lowest was 2.84. And the median was 8.21.
STU:PWC's PEG Ratio is ranked worse than 72% of 300
companies
in the Utilities - Regulated industry
Industry Median: 1.71
vs STU:PWC: 4.09
Peter Lynch thinks a company with a P/E ratio equal to its growth rate is fairly valued.
Pinnacle West Capital (STU:PWC) PEG Ratio Explanation
To compare stocks with different growth rates, Peter Lynch invented a ratio called PEG Ratio. PEG Ratio is defined as the P/E ratio divided by the growth ratio. He thinks a company with a P/E ratio equal to its growth rate is fairly valued. Still he said he would rather buy a company growing 20% a year with a P/E of 20, instead of a company growing 10% a year with a P/E of 10.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
For the Utilities - Regulated Electric subindustry, Pinnacle West Capital's PEG Ratio, along with its competitors' market caps and PEG Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Pinnacle West Capital PEG Ratio vs Utilities - Regulated Industry
For the Utilities - Regulated industry and Utilities sector, Pinnacle West Capital's PEG Ratio distribution charts can be found below:
* The bar in red indicates where Pinnacle West Capital's PEG Ratio falls into.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
* Note: The 5-Year EBITDA Growth Rate is the 5-year average EBITDA per share growth rate. While the denominator is a percentage, we use the whole number as opposed to the decimal form for the calculation. For example, 5% would be shown as 5 as opposed to 0.05. If it's smaller than or equal to 0, then the PEG Ratio is not calculated.
Pinnacle West Capital (STU:PWC) has a PEG Ratio of 4.14 as of Jul. 05, 2026. Price-earnings to growth ratio is the ratio of price-earnings to a company's earnings growth rate. View historical data on Pinnacle West Capital and its competitors. This is 50% below median its historical median of 8.21. Over the past decade, Pinnacle West Capital's PEG Ratio has ranged from 2.84 to 26.79. According to the industry distribution chart, Pinnacle West Capital ranks #216 out of 300 companies in the Utilities - Regulated industry, placing it in the top 72%.
Is Pinnacle West Capital's PEG Ratio too high?
Pinnacle West Capital's current PEG Ratio of 4.14 is 50% below median its 10-year median of 8.21. Over the past 10 years, this metric has ranged from a low of 2.84 to a high of 26.79. The Utilities - Regulated industry median PEG Ratio is 1.71. Pinnacle West Capital's value of 4.14 is 142.1% above this industry median. Based on the distribution chart, Pinnacle West Capital ranks #216 out of 300 companies in the Utilities - Regulated industry, which is below the industry midpoint. Overall, Pinnacle West Capital has a GF Score™ of 78/100, reflecting its overall financial health beyond just this single metric.
How does Pinnacle West Capital's PEG Ratio compare to OGE and IDA?
According to the Utilities - Regulated industry distribution chart, Pinnacle West Capital ranks #216 out of 300 companies for PEG Ratio. This places Pinnacle West Capital in the lower half of its industry. The industry median PEG Ratio is 1.71. Pinnacle West Capital's value of 4.14 is 142.1% above this benchmark. Historically, Pinnacle West Capital's own PEG Ratio has ranged from 2.84 to 26.79 over the past decade. While the company's 10-year median is 8.21 vs. the industry median of 1.71, Pinnacle West Capital has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good PEG Ratio for an Utilities - Regulated company?
The median PEG Ratio among Utilities - Regulated companies is 1.71, based on 300 companies in the industry. Companies in the top quartile (top 25%) have a PEG Ratio significantly above this median, while those in the bottom quartile fall well below. However, PEG Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Pinnacle West Capital's current PEG Ratio of 4.14 is 142.1% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high PEG Ratio mean?
A high PEG Ratio can signal that a stock is expensive relative to its fundamentals. Price-earnings to growth ratio is the ratio of price-earnings to a company's earnings growth rate. View historical data on Pinnacle West Capital and its competitors. For the Utilities - Regulated industry, the median PEG Ratio is 1.71 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Pinnacle West Capital's current PEG Ratio is 4.14, which is 50% below median its own 10-year median of 8.21. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Pinnacle West Capital stock overvalued right now?
Pinnacle West Capital (STU:PWC) has a current PEG Ratio of 4.14. The stock's GF Value™ is €78.08, compared to a current price of €94.88 — trading 21.5% above its estimated fair value. The current PEG Ratio is 4.14, which is 50% below median its 10-year median of 8.21 and 142.1% above the Utilities - Regulated industry median of 1.71. Pinnacle West Capital's overall GF Score™ is 78/100 with 14 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is PEG Ratio calculated?
PEG Ratio is calculated from a company's financial statements. For Pinnacle West Capital (STU:PWC), the current PEG Ratio is 4.14 as of Jul. 05, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Pinnacle West Capital (STU:PWC) Overvalued in 2026?
Based on GuruFocus' analysis, Pinnacle West Capital stock appears to be overvalued.
The current stock price of €94.88 is trading 21.5% above its estimated GF Value™ of €78.08.
Key valuation signals for STU:PWC:
PEG Ratio: 4.14 (50% below median its 10-year median of 8.21)
GF Value™: €78.08 vs. price of €94.88 (21.5% above fair value)
Industry Position: 142.1% above the Utilities - Regulated median (#216 of 300)
No single metric tells the full story. See the STU:PWC stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Pinnacle West is a holding company whose principal subsidiary is Arizona Public Service, a vertically integrated electric utility serving approximately 1.4 million customers across a 35,000-square-mile territory in central Arizona, including the Phoenix area. APS owns or leases 6.5 gigawatts of power generation capacity, including a 29% ownership stake in one of the largest nuclear plants in the US, Palo Verde. Half of the electricity that APS supplies to customers comes from clean energy sources, including nuclear.
78GF Score
Get the complete analysis for STU:PWC
PEG Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
STU:PWC has been successfully added to your 
