Pinnacle West Capital entered this earnings day with the stock slightly on the back foot, down over the past week and month, yet it finished today modestly higher at US$101.45. That small 0.6% gain understates the real story. The headline from this quarter is a profit squeeze. Quarterly earnings per share of about US$1.47 on revenue of roughly US$1.46b came alongside management’s reminder of higher interest expense and heavier depreciation. For a regulated utility that investors often treat as a bond proxy, those financing and cost pressures are the number to focus on next.

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Q2 2026 Earnings Summary

• Revenue, Q2 2026 vs. Q2 2025: US$1,455.7m vs. US$1,358.8m (up about 7%)
• Net Income, Q2 2026 vs. Q2 2025: US$178.6m vs. US$192.6m (down about 7%)
• Basic EPS, Q2 2026 vs. Q2 2025: US$1.47 vs. US$1.61 (down about 9%)
• Net Profit Margin, trailing 12 months vs. prior year: 11.5% vs. 11.0% (slight improvement)

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Pinnacle West bullish story leans on real demand

Bulls argue Pinnacle West Capital is a regulated growth utility riding Arizona’s population boom and industrial build out, with grid and rate modernization helping keep earnings on track. The quarter gives that story some real backing. Weather adjusted sales grew 9.6% and customer numbers increased 2.1%, with residential usage up 5.6% and commercial and industrial demand up 12.7%. Management linked that strength directly to data centers and semiconductor activity, which lines up with the narrative around TSMC and the 4.5 GW plus queue. Reliability held through record heat with a new peak of 9,164 MW, suggesting the recent generation and transmission projects are doing their job. Reaffirmed full year EPS guidance at the upper end of US$4.55 to US$4.75 also points to management confidence that current capital and regulatory plans can absorb higher depreciation and interest for now.

Bear case highlights cost squeeze and regulatory lag risks

The bearish view is that heavy fossil linked capex, regulatory lag and rising financing costs will squeeze Pinnacle West Capital’s earnings before new rates catch up. Q2 plays directly into that concern. EPS of US$1.43 declined year on year despite strong load growth because interest expense and depreciation on new plants stepped up and transmission revenue timing moved against the company. Management reiterated that meaningful rate relief is only expected after the Q4 commission decision and will initially rely on older test year data. That fits the risk that margins stay tight during the heaviest part of the capital cycle. The announced Cholla coal to gas conversion, with about US$440m of potential extra capex, reinforces questions about long lived gas exposure and possible stranded asset risk if decarbonization policies or relative economics shift faster than expected.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.