Pinnacle West Capital Corporation (PNW) Stock Price & How to Invest
Last updated July 2026
Short answer
PNW is Pinnacle West Capital, the Phoenix holding company whose only meaningful asset is Arizona Public Service, the regulated electric utility serving about 1.46 million Arizona customers. It is a rate-base compounding story with an unusually fast-growing service territory, and its next twelve months hinge almost entirely on one thing: how the Arizona Corporation Commission rules on the rate case now awaiting decision.
PNW stock price
As of 2026-08-21, Pinnacle West Capital Corporation (PNW) last closed at $99.30, up 8.9% over the past year. Over the past 52 weeks it has traded between $85.87 and $109.37.
Prices are daily closing prices from Yahoo Finance and may be delayed. For the live quote, check your broker or Pinnacle West Capital Corporation's investor relations page. Walnut is informational, not investment advice.
What does Pinnacle West Capital Corporation (PNW) do?
Pinnacle West Capital Corporation (NYSE: PNW) is a holding company, and essentially all of its earnings come from Arizona Public Service, the largest electric utility in Arizona. APS serves roughly 1.46 million retail customers across most of the state, owns and operates the Palo Verde Generating Station (the largest nuclear plant in the United States by output), and earns a regulated return on its transmission, distribution and generation investment. Rates are set by the Arizona Corporation Commission for retail service and by FERC for transmission. In the twelve months through June 2026 the company produced about $5.55 billion of operating revenue and roughly $640 million of net income attributable to common shareholders, on total assets of about $32.6 billion.
The investment picture is a mismatch between demand and rates. Weather-normalized retail sales rose about 9.6% in the second quarter of 2026, with commercial and industrial volumes up roughly 13.6% year to date as semiconductor fabs and large data centers ramp inside the service territory, and management has raised its long-term sales growth target to 5% to 7% through 2030. Rate base has grown to roughly $13.3 billion on the ACC side, yet the rates currently in effect were set from a test year ended June 30, 2022 against an approved rate base of about $10.36 billion at a 9.55% allowed ROE. That gap is regulatory lag, and it is why 2026 EPS guidance of $4.55 to $4.75 sits below the $5.05 the company reported for 2025 even as volumes surge. APS has asked for roughly $692 million of additional revenue requirement at a 10.70% ROE; Commission staff has countered near $506 million at 9.55% to 9.80%. A decision is expected around December 2026.
What's driving Pinnacle West Capital Corporation (PNW)?
1. The 2025 rate case and the formula rate proposal
Docket E-01345A-25-0105 is the central variable. In its rejoinder testimony APS sought a total revenue requirement increase of about $691.6 million (a net revenue increase near $609 million after adjustor transfers, or roughly a 14.69% day-one bill impact) on a 10.70% ROE, a 0.90% fair value increment and a 52.35% common equity layer, while ACC staff surrebuttal landed at about $506.5 million and an ROE range of 9.55% to 9.80%. APS is also asking for a Formula Rate Adjustment Mechanism that would true rates up annually whenever the earned ROE falls outside a 40 basis point band, which would compress the lag that has been holding earned returns below authorized. Hearings began May 18, 2026, initial briefs were due August 27 with reply briefs September 11, and the company estimates a final decision in December 2026.
2. Load growth that is unusually concentrated in large customers
APS reported a 2025 system peak of about 8.6 GW against roughly 4.5 GW of committed new load and an uncommitted pipeline management sizes near 20 GW. Retail customer growth of about 2.1% is only part of it; the swing factor is extra high load factor commercial and industrial customers, which management expects to contribute 4 to 6 points of the 5% to 7% long-term sales growth. Ten consecutive quarters have come in at or above the original 4% to 6% guidance range, so this is a demonstrated trend rather than a projection, though it also concentrates counterparty and rate-design risk in a handful of very large accounts.
3. A capital plan that turns demand into rate base
APS has guided to roughly $10.35 billion of capital spending across 2025 to 2028, at about $2.60 billion in 2026 and stepping to $2.70 billion by 2028, which excludes up to about $440 million for converting the retired Cholla plant to 380 MW of gas generation. On top of that sit up to 2 GW of announced new gas generation, roughly $200 million spent buying out a sale-leaseback on close to 100 MW of Palo Verde capacity plus about $500 million of added nuclear capital over ten years, and a transmission plan the company sizes above $6 billion cumulatively through 2035. Guided ACC rate base moves from about $13.33 billion at the end of 2025 toward roughly $15.7 billion in 2028, with the FERC-jurisdictional piece going from about $2.82 billion to $4.0 billion.
4. Transmission earning a materially higher return
The FERC formula transmission rate that took effect June 1, 2026 carries a 10.75% allowed ROE on a 51.99% equity layer against roughly $2.81 billion of rate base, more than 100 basis points above the ACC-authorized retail return and recovered through an annual formula rather than a litigated case. As transmission grows toward the guided $4.0 billion of rate base, a larger share of the company's earnings comes from the jurisdiction with the faster and cleaner recovery mechanism, which changes the blended quality of the earnings stream even if the headline ACC outcome disappoints.
What are the risks to Pinnacle West Capital Corporation (PNW)?
The single largest risk is regulatory. Arizona corporation commissioners are elected, a 14.69% day-one bill increase is a politically difficult ask, and the gap between what APS requested and what staff recommended is wide enough that the outcome materially changes the earnings trajectory; the company has been on the wrong end of Arizona rate decisions before. Financing is the second issue: capital spending of roughly $2.6 billion a year against about $640 million of trailing earnings means continuous debt and equity issuance, with interest expense net of AFUDC guided to $415 million to $435 million for 2026 and average diluted shares guided to 123.8 million against roughly 119.4 million a year earlier, so dilution is a live drag on per-share results. Earnings are extremely seasonal because the territory is summer-peaking, which leaves the first quarter near breakeven and makes a mild summer expensive. Palo Verde concentrates operational, outage and nuclear regulatory risk in one asset, and planned outages are a scheduled drag on specific quarters. Drought and water supply, wildfire exposure, and the durability of large data center and manufacturing load commitments round out the list, and the dividend at roughly 78% of the 2026 guidance midpoint leaves modest headroom for the low single digit dividend growth the company has been delivering.
What is the Pinnacle West Capital Corporation (PNW) forecast?
13 analysts publish price targets on PNW, averaging $106.08 against a $99.38 price as of August 2026, or +6.7%. The published targets run from $87.00 to $129.00, a moderate spread, and the ratings split 4 buy, 11 hold, 1 sell. Over the last six months there have been 7 raises and 4 cuts among the published actions. A price target is what an analyst published on a date, not a prediction, and sell-side ratings skew positive across the whole market.
Read the full PNW forecast and price target for the target table, the recent rating actions by firm, and how the consensus has shifted.
Is PNW a buy or a sell?
We give no verdict on Pinnacle West Capital Corporation. Both cases are real, which is why the question is contested at all, so here is the strongest version of each.
The case for buying. The 2025 rate case and the formula rate proposal. Docket E-01345A-25-0105 is the central variable. The most optimistic published target, $129.00, assumes this works close to its best case.
The case against. The single largest risk is regulatory. The most pessimistic target, $87.00, is roughly what PNW is worth if this bites instead.
Read the full bull and bear case on PNW, including what would have to change to break either one. Walnut is not an investment adviser.
How is Pinnacle West Capital Corporation (PNW) valued? (approximate, August 2026)
A simple financial snapshot. These are approximations and refresh quarterly; for current figures see Pinnacle West Capital Corporation's investor relations page or your broker.
- Revenue (TTM): ~$5.55B (FY2025 $5.34B; 2026 guidance $5.56B to $5.66B)
- Diluted EPS (TTM): ~$5.21 (FY2025 $5.05; 2026 guidance $4.55 to $4.75)
- Net income to common (TTM): ~$640M
- Market cap: ~$12.0B (~$99 per share, ~121.2M shares outstanding)
- P/E: ~19x trailing, ~21x on the 2026 guidance midpoint of $4.65
- Dividend: ~$3.64 annualized (~$0.91 quarterly), ~3.7% yield, ~78% of the 2026 guidance midpoint
The trailing multiple understates the forward one because 2025 included an El Dorado investment gain and favorable weather that do not repeat, so the stock is closer to 21 times guided 2026 earnings than to 19 times. Against a $32.6 billion balance sheet carrying roughly $10.6 billion of long-term debt (including current maturities) and about $7.0 billion of common equity, the valuation reflects a long-term EPS growth target of 5% to 7% off the original 2024 midpoint rather than the 9%-plus sales growth being reported. The difference between those two numbers is regulatory lag and financing cost, which is exactly what the pending rate case and the proposed formula rate mechanism are meant to address.
Who competes with Pinnacle West Capital Corporation (PNW)?
Regulated electrics with large-load growth stories
Xcel Energy, Southern Company, Duke Energy, NextEra Energy, Entergy and Evergy are all pitching investors on data center and manufacturing load driving rate base. They are larger and mostly multi-state, which dilutes single-regulator risk in a way Pinnacle West cannot; the trade is that PNW's growth is more concentrated and therefore more visible in the numbers when it works.
Southwest and adjacent regional utilities
Edison International in California, Sempra in California and Texas, Fortis-owned Tucson Electric Power in southern Arizona, and IIF-owned El Paso Electric are the nearest geographic peers, though the last two are not separately listed. Salt River Project, a public power entity, competes directly with APS for Arizona economic development load without being investable at all, which is a structural feature of the territory rather than a temporary one.
Income substitutes
Broad utility funds such as XLU and VPU, plus investment grade corporate and Treasury yields, are what a PNW position competes with for the same dollar. A single-state regulated utility with a roughly 3.7% yield and mid-single-digit growth is priced against those alternatives, so moves in long rates tend to matter to the share price as much as anything happening in Phoenix.
What stocks are similar to Pinnacle West Capital Corporation (PNW)?
Other names that sit close to PNW: same theme, named as a direct competitor, or held beside it in the same funds. Each entry says which. Worth a look if you are thinking about diversification within a thesis rather than concentration on one ticker.
How to invest in Pinnacle West Capital Corporation (PNW)
There are three common ways to get PNW exposure. Buy shares (or fractional shares) directly at any major broker. Hold an ETF that includes it, which spreads the position across many companies. Or build it into a focused thematic portfolio, so PNW sits alongside other stocks that express the same thesis.
Walnut takes the portfolio route. Describe a thesis where PNW fits (for example “AI infrastructure” or “dividend-growth large-caps”) and the AI proposes 5 to 6 constituents with target weights. You review the plan and fund it through your own broker when you're ready.
New to this? Start with how to invest in stocks, see how to analyze a stock with AI, or compare the best AI stock analyzers.
The bottom line on Pinnacle West Capital Corporation (PNW)
Pinnacle West is a single-state regulated utility where demand growth is running far ahead of what current rates were set to recover, so the December rate decision, not the sales trend, is what determines whether the growth turns into earnings.
More on Pinnacle West Capital Corporation (PNW)
Whether PNW is worth buying today depends more on your time horizon and what you already hold than on any single call. We walk through valuation, what would have to go right, and the risks in is PNW a buy or a sell?, and where the stock could go from here in the PNW stock forecast.
For income investors, whether PNW pays a dividend and how the payout looks is covered in does PNW pay a dividend? And to weigh PNW against a peer, read the full side-by-side comparisons: PNW vs XEL and PNW vs DUK.
Wondering how PNW fits the portfolio you already own? Walnut is an AI investing app that connects your brokerage read-only and answers questions like that about your actual holdings: overlap, concentration, and how each position tracks the S&P 500. Compare the best AI portfolio analyzers or see the best AI investing apps in 2026.
Investing in Pinnacle West Capital Corporation with AI
Connect the broker you already use and ask Walnut's AI how PNW fits what you actually hold: whether you own it already through a fund, what it would do to your concentration, and how it has tracked the S&P 500. Read-only by default, and you approve anything before it reaches your broker.
FAQ
What does Pinnacle West Capital actually do?
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It is a holding company whose earnings come almost entirely from Arizona Public Service, the state's largest electric utility. APS serves about 1.46 million retail customers, owns generation, transmission and distribution assets, and operates the Palo Verde nuclear station. Revenue is set by regulators rather than by market pricing, so results follow rate base, allowed return and volumes.
Why is 2026 EPS guidance lower than what the company earned in 2025?
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2025 benefited from an El Dorado investment gain and favorable weather that are not assumed to repeat, and 2026 carries higher depreciation and property taxes on a much larger plant balance, higher financing costs, and a larger share count (123.8 million average diluted shares guided versus roughly 119.4 million a year earlier). Guidance of $4.55 to $4.75 sits below the $5.05 reported for 2025 despite retail sales growing at high single digits.
What is the pending APS rate case and when is it decided?
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Docket E-01345A-25-0105 at the Arizona Corporation Commission. APS's rejoinder position seeks about $691.6 million of additional revenue requirement at a 10.70% ROE with a 0.90% fair value increment, roughly a 14.69% day-one bill impact, while Commission staff recommended near $506.5 million at 9.55% to 9.80%. Hearings began May 18, 2026, briefs ran through September, and the company estimates a final decision in December 2026.
What dividend does PNW pay?
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About $0.91 per share quarterly, roughly $3.64 annualized, which works out near a 3.7% yield at recent prices. Growth has been low single digit for several years because the payout already runs around 78% of the 2026 guidance midpoint and the capital plan absorbs the rest of the cash. A larger rate case outcome would create more headroom; a smaller one would not.
How much are data centers really contributing?
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Commercial and industrial sales were up about 13.6% year to date through the second quarter of 2026, and management attributes 4 to 6 points of its 5% to 7% long-term sales growth target to extra high load factor customers. Against a 2025 system peak near 8.6 GW, APS reports roughly 4.5 GW of committed new load and an uncommitted pipeline it sizes around 20 GW. Part of the rate case is a rate design change that would directly assign generation costs to those customers.
Does Pinnacle West own nuclear plants?
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APS operates and holds a stake in the Palo Verde Generating Station in Arizona, the largest nuclear plant in the United States by annual output. The company recently spent about $200 million buying out a sale-leaseback covering close to 100 MW of that capacity and plans roughly $500 million of additional Palo Verde capital over ten years. Palo Verde is also the source of the scheduled outages that make certain quarters look weak.
What are the biggest risks to the story?
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An unfavorable or delayed Arizona rate decision, since elected commissioners are being asked to approve a double-digit bill increase. Beyond that: continuous equity and debt issuance to fund about $2.6 billion of annual capital spending, heavy summer seasonality that makes weather a real earnings variable, concentration of operational risk in Palo Verde, drought and wildfire exposure in the territory, and the possibility that committed large-customer load arrives slower than planned.
How would someone hold PNW in a portfolio?
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It trades on the NYSE as a single common share class, so it can be bought through any brokerage that offers US-listed equities, including fractionally at brokers that support it. In practice PNW tends to be held as a rate-sensitive income position rather than a growth position, and investors tracking it usually watch the ACC docket calendar, the quarterly weather-normalized sales figure and the earned versus authorized ROE gap rather than the headline revenue line.
Walnut is informational, not investment advice. Financial figures on this page are approximations; always verify current numbers with Pinnacle West Capital Corporation's investor relations page or your broker before making investment decisions.