Pinnacle West Capital Corporation Value Investment Research Report

Hunting ten-year five-baggers among great growth stocks — pressing the upside question: "Can it get much bigger?"

• QHow high is its market ceiling? Is it enlarging an existing pie, or creating an entirely new market?5/10

  A

  Bottom line: PNW's ceiling is about taking a few more slices from an existing pie that is growing but still bounded. It is not creating a new market. The company is expanding a relatively fast-growing electricity sales territory in Arizona, not opening a new category. Measured against Baillie Gifford LTGG's yardstick of finding great growth stocks that can rise 5 times in 10 years, this ceiling is only respectable, not close to a blue-sky opportunity.

  Start with what it actually does. APS is a regulated regional electric utility that supplies power to about 1.4 million retail customers across 11 counties in Arizona. Nearly all of its revenue comes from electricity sales and related transmission and distribution assets within this legally franchised service territory. That means its market boundary is locked in from the beginning by 2 things: the physical scope of its service area, and the return regulators allow it to earn on its rate base. It cannot sell the same product worldwide at near-zero marginal cost like a software company, and it cannot cross into another utility's grid to take customers. Growth can only come from more electricity consumption and more investment within the same patch of land.

  This pie is indeed getting larger, which is PNW's bright spot compared with many mature utilities. Continued in-migration to Arizona, data centers, and high-load commercial and industrial customers are pushing APS's load curve upward. The company disclosed that in 2025 it achieved 2.0% residential sales growth and 7.5% commercial and industrial (C&I) sales growth, and raised its long-term weather-normalized retail sales growth guidance to 5%–7% and extended it through 2030. The main driver is very large-load customers such as data centers. The report also states that the company's service territory is one of the faster-growing regions in the United States. So this is an "incremental market within a mature industry", with more volume growth than a typical no-growth utility.

  But the absolute height of the ceiling must be discounted honestly. First, 5%–7% electricity sales growth is only low single-digit growth by technology-growth standards. It can support a decent compounding rate, but not the exponential expansion required for a 5 times return in 10 years. Second, whether volume growth becomes shareholder return depends on whether regulators allow these investments into the rate base and grant a reasonable ROE. Part of the incremental pie is taken by regulators and customers. Third, data center load is a real driver, but it also creates the opposite risk that large customers may build their own power supply and bypass the grid, which the report identifies as a clear uncertainty.

  The honest conclusion is this: PNW's ceiling is an existing pie that is growing, but at a moderate pace and with ownership of the upside constrained by regulation. It is enlarging an existing market rather than creating a new one. The scale is enough to support steady defensive returns, but it does not have the kind of blue-sky upside Baillie Gifford seeks.

  Jun 10, 2026
• QCan its revenue at least double over the next 5 years? Is growth mainly driven by volume, price, or new businesses?3/10

  A

  Bottom line: PNW's revenue is highly unlikely to double over the next 5 years. Extrapolating its own disclosed long-term growth rate of 5%–7% implies cumulative 5-year growth of only about 30%–40%, an order of magnitude below the roughly 15% annualized growth needed to double. Growth is mainly driven by volume, with price as a secondary contributor, and with almost no true new-business driver. This is a case where Baillie Gifford's hard test of "doubling revenue in 5 years" clearly shows PNW does not qualify, and that needs to be acknowledged plainly.

  First, set out the base and growth rate. The company reported 2025 operating revenue of $5.34 billion. To double within 5 years to about $10.7 billion, it would need to compound at roughly 15% for 5 consecutive years. The company's own long-term weather-normalized retail sales growth guidance is 5%–7%, extended through 2030, and its long-term EPS growth target is also 5%–7%. Even using the 7% high end for 5 straight years, cumulative growth is only about 40%. The conclusion is direct: PNW is nowhere near the doubling threshold.

  Now break down the 3 growth sources to see the engine structure:

  Volume is the main engine, and its quality is decent. Arizona in-migration, data centers, and high-load C&I customers are real sources of electricity-volume growth. The company has posted 9 consecutive quarters of weather-normalized retail sales growth at or above the 4%–6% range, and 7.5% C&I sales growth in 2025 is direct evidence of volume growth. This is the most solid part of its growth story.

  Price is the auxiliary engine, but it is firmly held back by the regulatory gate. PNW cannot raise prices on its own; it can only recover costs through rate cases. The pending 2025 rate case requests a net revenue increase of about $694 million, a first-day bill impact of about 14.75%, and an ROE of 10.70% (note: the report text's "net revenue increase of about $611 million and ROE of 10.75%" differs from the company's latest filing basis; $694 million/10.70% should be used). This potential price increase can contribute revenue from the second half of 2026, but the amount, timing, and ROE are all decided by the Arizona Corporation Commission (ACC), creating meaningful lag and uncertainty. The price leg is borrowed; it cannot run by itself.

  New business is basically absent. PNW has no independently scalable second growth pole. Its "new" activity is at most putting more capital expenditure, including about $10.35 billion of planned APS investment during 2025–2028, into generation, transmission, and distribution assets, then recovering that through rates. In substance, this is capital expansion of the existing regulated business, not a new category.

  One adverse signal cannot be ignored: the company's 2026 EPS guidance is $4.55–$4.75, below $5.05 in 2025. This shows the growth path is not a smooth upward line; financing dilution and cost-recovery lag can absorb earnings in some years. Overall, this is a business of steady, moderate volume growth and regulated revenue expansion. A 5-year revenue doubling is not on the table.

  Jun 10, 2026
• QAfter 5 years, what will take over as the next growth engine? Does that "second curve" exist today?4/10

  A

  Bottom line: PNW has no "second curve" in the traditional sense. Its next growth engine is still an extension of the same main curve: keep investing in Arizona's grid, then recover that investment through rates. If the question is whether a new growth pole already exists today and can take over after 5 years, the answer is no. From Baillie Gifford's perspective of whether the second curve already exists today, PNW is a classic single-curve company with no independent second pole. That needs to be acknowledged without inventing a curve that is not there.

  First define what counts as a second curve: Baillie Gifford is looking for a new growth pole that differs from the current core business, can independently take over after the core slows, and already has visible early form today, such as a cloud business inside an e-commerce company. By that standard, PNW's cards do not qualify.

  The "future growth" it talks about most often, load expansion from data centers and high-load C&I customers, is not a second curve in substance. It is the same regional electricity-sales curve being pulled steeper by external demand. The company raised long-term retail sales growth to 5%–7% and extended it through 2030, and C&I sales grew 7.5% in 2025. That makes the main curve steeper; it does not create a new curve. The monetization model is unchanged: invest into the rate base and earn a regulator-authorized return.

  Its capital plan, including about $10.35 billion of APS investment during 2025–2028 and more than $6 billion of cumulative potential transmission investment by 2035 as described in the report text, is also not a second curve. It thickens the main curve. More transmission, distribution, and gas-fired generation assets all return to the same regulated rate-recovery logic, with the same profit model as today.

  The areas that might truly count as "new" are either not materially present or not scaled at PNW. Unlike some peers, it does not have meaningful unregulated renewable development, storage commercialization, or an independent energy-services business that can scale on its own. The report also provides no evidence of any new business line that can contribute profit independently. In other words, what takes over 5 years from now will still be the same machine: Arizona keeps growing, APS keeps investing, and the ACC keeps approving rates.

  Add the implied question Baillie Gifford really cares about: what keeps it alive when the main curve slows? PNW's answer is not to switch to a new category. It is to rely on regulation and geographic tailwinds to keep the main curve growing moderately for as long as possible. The ceiling for that path is determined by 2 things: how long Arizona's population and business cycle can stay strong, and whether the ACC continues allowing investment into the rate base with a reasonable ROE. The current ACC-authorized ROE is 9.55%, while the 2025 rate case requests 10.70%.

  The honest conclusion: PNW is a single-engine business with no second curve. Its endurance does not come from a new engine, but from how long the growth-state and regulatory framework around the main engine can persist. For defensive investors, that is stable enough. For Baillie Gifford-style growth hunters, it lacks the critical upside option.

  Jun 10, 2026
• QWhat is its core competitive advantage? Will this moat widen or narrow over the next 3 to 5 years?5/10

  A

  Bottom line: PNW's core moat is the institutional barrier created by its legal franchise territory plus regulator-authorized returns. Inside its own service area, there is almost no second grid that can compete with it, and switching costs are close to infinite. But over the next 3 to 5 years this moat is likely to be stable rather than widening. The height of the wall, meaning the licensed monopoly, is hard to breach; the width of the returns shareholders can capture inside the wall is entirely in regulators' hands. Viewed through Baillie Gifford's question of whether the moat will widen or narrow, this is a special moat whose width is stable but whose return capture depends on third-party discretion. It cannot be treated like a consumer brand moat that widens as more people use it.

  The source of the moat is clear and real. APS is the sole electric provider within its legally defined service area across 11 Arizona counties, supported by franchise rights, generation/transmission/distribution permits, nuclear qualifications at Palo Verde, and the ACC/FERC rate framework. This is extremely hard to replicate. You cannot build a parallel grid covering the Phoenix metro area to take its customers, and users have almost no option to "switch electric companies". The report rightly rates switching costs as strong, patents/licenses/regulatory barriers as strong, and scale advantages as medium-strong. I agree with those qualitative judgments; the evidence is solid.

  But whether the moat will widen or narrow has to be answered on 2 levels. That is the key to this question:

  First level: the physical and legal moat is basically unchanged. Franchise territory, grid assets, and nuclear qualifications are structural and will not be eroded within 3 to 5 years. The only marginal threats are distributed generation, storage, and large customers' self-supply eating into edge load. The report lists these as risks, but they do not pose a substantive short-term threat to the monopoly position. This layer is stable.

  Second level: the returns moat can widen or narrow, depending on regulation. This is the most distinctive feature of PNW's moat. Its "earnings width" is not decided by the company. In 2022, the company came under earnings pressure from an unfavorable rate decision, a history also noted in the report, and it did not recover until new retail rates took effect in March 2024 with an ACC-authorized ROE of 9.55%. The pending 2025 rate case requests a net revenue increase of about $694 million, an ROE of 10.70%, and a formula rate adjustment mechanism (FRAM) to reduce regulatory lag (the report text's "611 million/10.75%" differs from the company's disclosed filing basis and the official filing should be used). If the ACC grants a favorable outcome, the returns moat will widen; if the result is conservative, the ROE is low, or the formula rate mechanism fails, the width will narrow. This layer is decided by regulators.

  So the honest judgment is that I do not think PNW's moat is clearly widening. A more accurate definition is: the moat is stable, with significant regulatory variability. It has a real moat, which is its hardest strength, but that moat creates a right to stable returns, not ever-expanding excess returns. For a Baillie Gifford investor, a moat that cannot be continuously widened by the company's own efforts and whose return ceiling is institutionally capped is less attractive. It can defend; it cannot attack.

  Jun 10, 2026
• QIf its core business is disrupted, does it have the genes to reinvent itself? How does it handle mistakes and bad news?4/10

  A

  Bottom line: PNW has weak "reinvention genes", but for a regulated utility that is not a fatal flaw because its core business is very unlikely to be destroyed by disruption. Its way of handling mistakes and bad news is compliant, transparent, and process-driven through regulation. It is steady, but not bold. Viewed through Baillie Gifford's question of whether a company can reinvent itself when its core business is disrupted, PNW requires first clarifying that it is not really in a disruption-prone industry, then evaluating its correction culture honestly.

  First address the hidden premise: if the core business is disrupted, does it have reinvention genes? Frankly, the probability of an electric utility being disrupted wholesale is very low. Electricity is a necessity, the distribution grid is a physical monopoly asset, and no technology can make Phoenix stop needing APS power overnight. The real "disruption-like" threats are gradual: distributed solar, storage, and large customers' self-supply eating into edge load. The report lists these as risks. PNW's response to this kind of slow erosion is not to turn itself into another company, but to adjust its capital structure, pursue rate mechanisms, and expand grid investment within the existing framework. That is sound adaptation, but it is not the kind of regenerative ability Baillie Gifford admires, where a company can be reborn after its core is hit. PNW does not have that gene, and largely does not need it. But if the business model were structurally weakened, its room to maneuver would be limited.

  What can be judged more concretely is how it treats mistakes and bad news. There is real evidence:

  Positive evidence 1: governance does not simply protect insiders. The report discloses that the company has anti-hedging and anti-pledging policies and a clawback mechanism that complies with NYSE rules, along with share ownership requirements for executives and directors. In addition, for certain 2025 O&M incentive metrics, the board did not automatically adjust them even though favorable adjustments were permitted. That suggests the board does not fully accommodate management. It is a credible signal that bad news is not simply polished away.

  Positive evidence 2: it discloses risks and past setbacks candidly. The report notes that the company directly lists in investor materials the factors that could harm performance: whether rate recovery is timely and sufficient, whether data center load materializes, whether large customers build their own power supply, climate and wildfire risks, nuclear operations, interest rates, and financing capacity. It also does not avoid the history of earnings pressure from an unfavorable rate decision in 2022. Putting bad news on the table and then using it to push the 2025 new rate case and a formula rate adjustment mechanism (FRAM) to repair regulatory lag is a mature posture of acknowledging problems and correcting them institutionally.

  Positive evidence 3: there are no obvious accounting red flags. The company is continuously audited by Deloitte. The report judges that financial-statement complexity comes from normal industry items such as regulatory assets/liabilities, nuclear decommissioning trusts, and fuel deferrals, not accounting tricks. Not hiding and not manipulating are the baseline of a correction culture, and PNW meets that baseline.

  The honest conclusion: by Baillie Gifford standards, PNW's reinvention gene is weak. It is a company that operates steadily within a fixed framework and corrects course through regulatory processes rather than bold transformation. The good news is that its industry can persist for a long time without dramatic reinvention. The bad news is that if the business model were ever structurally eroded by distributed energy, it lacks the aggressive gene to rebuild from scratch. For growth investors looking for transformation under stress, this is a neutral-to-weak trait.

  Jun 10, 2026
• QDoes management, especially the founder, have a long-term view and interests deeply aligned with the company? Is it willing to sacrifice current profit for outcomes 5 to 10 years from now?4/10

  A

  Bottom line: PNW's management is a rational, compliant, and transparent professional management team, but it is not an owner group deeply aligned with shareholders. Directors and executives collectively own very little stock, and there is no founder structure. By Baillie Gifford standards, that is a clear negative. The company is indeed willing to invest capital for the long term and sacrifice near-term cash, but that is more the industry destiny of a regulated utility than an active long-termist choice. This question requires separating passive long-term investment imposed by the industry from active long-term vision by management.

  Start with alignment of interests, the dimension Baillie Gifford cares about most. The evidence is unfavorable. The report discloses that as of March 12, 2026, all directors and executives together held only about 229,500 shares, a very small proportion of total shares outstanding of about 121 million shares. The CEO personally owned about 37,600 shares. At the current share price of about $102.65 as of June 9, 2026, with a market capitalization of about $12.4 billion, the CEO's personal stake is worth only about $3.8 million. For the CEO of a listed electric utility, that is not "having personal net worth tied to the company and sharing the fate of ordinary shareholders". The company has ownership guidelines of 5 times salary for the CEO and 2 times or 1 times for other executives, and all NEOs are compliant, but this is a compliance floor, not an owner mentality of heavily owning the company's stock. There is no founder and no controlling shareholder with deep alignment. Baillie Gifford would deduct points directly here, and I fully agree with the report's judgment.

  Now consider long-term vision and willingness to sacrifice current profit for 5 to 10 years out. The answer is yes, but partly because the industry forces it. The company completed a CEO transition in 2025, with Ted Geisler taking over. The strategic focus is expanding the grid, balancing reliability and affordability, and improving investment recovery speed. Capital allocation best shows the willingness to spend now for the long term: the company prioritizes cash toward the about $10.35 billion APS capital plan for 2025–2028. It knows this will keep full-scope free cash flow negative and require new debt and equity financing, but it still invests. This is indeed spending first for future rate base and load growth. A direct supporting point: 2026 EPS guidance of $4.55–$4.75 is below $5.05 in 2025, and management did not cut investment just to protect short-term EPS. But objectively, this heavy investment is the required path for a utility to put assets into the rate base and earn returns. It is determined by industry structure and should not all be credited as active management long-termism.

  The incentive design has positives. The report notes that annual cash incentives are not purely EPS-driven; they also include operating dimensions such as reliability, customer experience, and safety. The 2026 long-term incentive design de-emphasized the old MW installation metric and shifted to a mixed set of metrics more closely tied to reliability and affordability. That shows the board's incentive direction is healthy and does not encourage management to play short-term number games.

  The honest conclusion: management is trustworthy, rational, transparent, and its capital allocation fits utility logic. Those points pass. But on Baillie Gifford's core standard of deep alignment between management interests and the company, PNW is clearly weak. This is a qualified professional management team, not an owner team that has staked its fate on the company. For Baillie Gifford-style investors, that is a real weakness and should not be dressed up.

  Jun 10, 2026
• QIf it disappeared tomorrow, how much would customers miss it? Is its growth model sustainable and not dependent on harming society or regulation?6/10

  A

  Bottom line: if APS disappeared tomorrow, its 1.4 million customers would miss it immediately, severely, and without substitute, because electricity is a necessity and there is no second grid to replace it. That is the strongest side of its indispensability. But its growth model is also highly dependent on regulatory permission and customers' bill tolerance, which makes it a double-edged sword. It does not profit by harming society, but every dollar of growth must pass through regulators and bill-paying residents. Its sustainability is constrained by the political and social tolerance for price increases. Viewed through Baillie Gifford's dual lens of indispensability plus social/regulatory sustainability, PNW is extremely strong on indispensability, while its growth not depending on harm to society and regulation is merely qualified and constrained.

  Start with indispensability. This is PNW's hardest strength. APS supplies power to about 1.4 million retail customers across 11 Arizona counties. In the hot Phoenix metro area, electricity for air conditioning is directly linked to residents' safety. Customer dependence is not a matter of "liking to use it"; it is that they cannot live without it. There is no second grid substitute, and switching costs are close to infinite, which the report accurately rates as strong. From this angle, the degree to which customers would miss it if it disappeared is far beyond any consumer brand. But Baillie Gifford's deeper point should be stated honestly: this indispensability comes from monopoly and necessity, not from customer love created by a superior product. Customers will not willingly pay more for electricity because they love APS. The report rates brand advantage as weak, and that is exactly the point. Customers are forced to depend on it, not emotionally attached to it.

  Now consider whether growth is sustainable and not dependent on harming society or regulation. This part needs more care and has to be viewed from both sides:

  The company itself does not profit by harming society. Power supply is a public service with strong positive externalities, supporting Arizona's population inflow as well as data centers and commercial and industrial development. The company's strategy explicitly puts affordability alongside reliability, and its 2026 long-term incentives also de-emphasized MW installation and shifted toward reliability and affordability metrics. Directionally, it is actively trying to manage bill impact for customers, which is healthy.

  But its growth is naturally tied to regulation and customer bills, so sustainability depends on social tolerance. Its growth model is: invest into the rate base, recover from customers through rate cases, and earn an authorized ROE. The pending 2025 rate case requests a net revenue increase of about $694 million, a first-day bill impact of about 14.75%, and an ROE of 10.70% (the report text's "611 million/10.75%" differs from company disclosures; the official filing basis should be used). A 14.75% bill increase is not small. It means growth requires repeatedly persuading the ACC and bill-paying public to accept higher rates. If the increase reaches the limit of social tolerance, or regulators become more conservative because of public pressure, as happened when the company came under pressure from an unfavorable rate decision in 2022, growth will be held back. In other words, it does not harm society, but it needs continuing permission from society and regulators to grow. That is an endogenous constraint that is always hanging overhead.

  The honest conclusion: customers would miss APS intensely, and its indispensability is top tier. But that indispensability comes from monopoly rather than love, and its growth is permanently constrained by the gate of regulation plus bill tolerance. This is not a business that profits by harming society, but neither is it a business that can expand freely outside society and regulation. For Baillie Gifford-style long-term investors, this sustainable-but-constrained trait is neutral: stable enough, but lacking autonomous growth freedom.

  Jun 10, 2026
• QWhat are the unit economics of this business, including gross margin and incremental returns? Do they improve or deteriorate as scale increases? Where does the money it earns go?5/10

  A

  Bottom line: PNW's unit economics are a classic heavy-asset model with a mid-level net margin, incremental returns capped by regulated ROE, and no obvious improvement in unit economics as scale increases. The more it grows, the more cash it needs, rather than the more profitable it becomes. Nearly all the money it earns goes back into capital expenditure, with debt and equity issuance filling the gap. Viewed through Baillie Gifford's lens of unit economics, incremental returns, scale effects, and where the money goes, PNW is clearly weak on this dimension. It is not a compounding machine whose margins improve as scale rises.

  Start with the absolute level of unit economics. The company reported 2025 net income of $616.5 million and revenue of $5.34 billion, implying a net margin of about 11.5%. That is normal for a regulated utility, neither high nor low. The key is not gross margin, but the fact that the profit ceiling of the business is locked by regulated ROE. APS's returns are determined by ACC-authorized ROE of 9.55% and FERC-authorized ROE of 10.75%, and the 2025 rate case requests only a 10.70% ROE. This means that for every dollar it invests into the rate base, the return regulators allow it to earn is bounded. Incremental return on capital, one of the metrics Baillie Gifford cares about most, has an inherent ceiling of about 9.5%–10.7%, and the return left to shareholders after financing costs is thinner.

  Now consider whether unit economics improve or deteriorate with scale. The answer is basically unchanged, and even more cash-hungry. This is where PNW looks least like a high-quality growth stock. Compare the numbers: from 2021 to 2025, revenue rose from about $3.8 billion to $5.34 billion, but EPS of $5.05 in 2025 was still below $5.47 in 2021, a comparison also shown in the report text. Scale increased, yet per-share earnings did not. The reason is that growth comes with heavy capital expenditure, recovery lag, and share dilution. Scale economies are almost absent here. A grid is not software. Serving one more customer often requires more lines and more capacity, not the benefit of zero marginal cost.

  The clearest evidence is where the earned money goes: almost entirely into capital expenditure, and even that is not enough, requiring debt and equity issuance. The cash-flow picture disclosed in the report is clear. 2025 operating cash flow was about $1.805 billion, while capital expenditure was about $2.625 billion, resulting in negative full-scope free cash flow (operating cash flow minus capital expenditure) for several consecutive years, about -$820 million in 2025, with the sequence shown in the report. The priority for cash is: first pour money into capital expenditure, including about $10.35 billion for APS during 2025–2028; then maintain and grow the dividend, with an annualized dividend of $3.64 per share; then rely on new debt and equity financing to fill the cash gap, with the report disclosing that about $1.0–$1.2 billion of holding-company equity financing will still be needed during 2026–2028. There is almost no sign of meaningful share repurchases at materially undervalued prices. This confirms the core judgment: the more it grows, the more cash it needs in the short to medium term, rather than the more profitable it becomes.

  The honest conclusion: PNW's unit economics are a heavy-asset model with a mid-level net margin, regulated caps on incremental returns, no improvement from scale, and profits heavily consumed by capital expenditure and dilution. It can generate stable accounting earnings, but it cannot produce the compounding effect Baillie Gifford seeks, where the business gets larger, unit economics improve, and free cash flow gushes. On this dimension, the plain fact is that it is weak.

  Jun 10, 2026
• QWhat conditions would need to hold at the same time for it to rise 5 times in 10 years? Are those conditions realistic? What expectations are embedded in today's share price?2/10

  A

  Bottom line: for PNW to rise 5 times in 10 years, or about 17.5% annualized, a string of low-probability events would have to happen at the same time. That is not realistic. At today's share price of about $102.65, the market already embeds an optimistic combination: a favorable rate-case outcome, successful delivery of 5%–7% growth, and no valuation compression. It is not priced for a 5 times outcome, but a lot of good news is already in the price, leaving buyers with a thin margin of safety. Viewed through Baillie Gifford's question of what must be true for a 5 times return in 10 years and what today's price implies, PNW is a case where a 5 times return is nearly impossible and the current price already looks full. The arithmetic has to be stated honestly.

  Start with the hard math. The current share price is about $102.65 as of June 9, 2026, with a market capitalization of about $12.4 billion. A 5 times return in 10 years means the share price reaching about $513 and a compound annual return of about 17.5%. Break that return into 3 pieces: dividend yield, earnings growth, and valuation change.

  Condition 1: earnings growth must far exceed the company's own guidance. The company's long-term EPS growth target is only 5%–7%. Even if it hits 7% for all 10 years, EPS only roughly doubles. Add a dividend yield of about 3.66%, and with no valuation change the 10-year total return would be only a bit more than a double, far short of 5 times. To get to 5 times, EPS growth would need to stay in the high double digits for a long period. For a regulated utility whose incremental returns are capped by ACC 9.55%/requested 10.70% ROE, that is almost impossible.

  Condition 2: valuation must expand sharply, but the stock is not cheap today. The current P/E is about 18.9 times, around the high side of the peer median (the report lists peer forward P/E: AEE 19.4x, XEL 22.9x, ES 14.6x). Utility P/E multiples are unlikely to rise sustainably above 30 times. The valuation expansion leg is weak, and compression risk is more relevant.

  Condition 3: financing and regulation must have zero misses for 10 straight years. To support a 5 times return, every rate case would need to grant generous ROE, the about $10.35 billion 2025–2028 capital plan would need to enter the rate base efficiently, interest rates and capital markets would need to cooperate continuously, data center load would need to materialize in full, and no major wildfire or nuclear incident could occur. So many variables lining up for 10 years is highly unlikely.

  So the condition list for a 5 times return is unrealistic. That needs to be said plainly.

  Now answer the more important implied question: what expectations are embedded in today's share price? The current market price is not pricing a 5 times outcome, but it is already full:

  First, the payoff signal is unfavorable. PNW's dividend yield is about 3.66%, which is actually below the roughly 4.54% yield on the 10-year U.S. Treasury at the same time. Buyers receive less immediate cash return than a risk-free Treasury while taking regulatory and financing uncertainty. That shows the market is paying a premium for future growth, not offering a defensive discount.

  Second, the share price is near its 52-week high. At about $102.65, it is near the top of the 52-week range of $85.32–$104.92. The report's reasonable intrinsic value range is $85–$100, and its ideal buying range is $75–$85. The current price is already at the upper end of the reasonable range or the lower edge of the optimistic range.

  Third, the market has already pulled forward a favorable rate-case outcome. The current price embeds a sequence of good news: a relatively smooth 2025 rate case, delivery of long-term 5%–7% growth, and no valuation compression. If any link undershoots expectations, the lack of a margin of safety means the share-price correction could be painful.

  The honest conclusion: a 5 times return in 10 years is an unrealistic hope for PNW. Its growth ceiling and regulatory constraints cannot support that multiple. Today's price of about $102.65 already reflects most optimistic assumptions and does not leave buyers with a meaningful margin of safety. This is the core reason the report gives a Watch rating rather than Buy, and I fully agree.

  Jun 10, 2026
• QWhy has the market not realized all this yet? Is it because investors do not understand it, look down on it, or cannot look far enough ahead? What could become the narrative inflection point?3/10

  A

  Bottom line: for PNW, this question needs to be inverted. The market has not misunderstood, dismissed, or failed to look far enough ahead. The opposite is true: the market has already recognized its growth attributes quite fully, even a little optimistically, pushing the stock to the upper end of its reasonable range near the 52-week high. So there is no hidden mispricing waiting to be discovered. The real narrative inflection point is a two-way event triggered by regulation: the final outcome of the 2025 rate case. Viewed through Baillie Gifford's question of why the market has not realized the story and what could trigger a narrative inflection, PNW is a case with no positive perception gap, and the answer is neutral or even slightly negative. We should not invent an undervaluation story for it.

  First answer directly whether the market does not understand it, looks down on it, or cannot look far enough ahead. None of the 3 holds:

  It is not because investors do not understand it. Regulated utilities are among the most thoroughly researched and well-covered sectors on Wall Street. PNW has broad sell-side coverage, and its investor materials disclose the key issues in detail: data center load, rate cases, and capital plans are all laid out. Its business model is simple enough that the report gives it a 4/5 score for understandability. There is no real comprehension barrier.

  It is not because investors look down on it. The market is not discounting it; it is giving PNW a peer-median-to-high valuation, with a P/E of about 18.9 times, above ES at 14.6x and close to AEE at 19.4x. Its share price is near the top of its 52-week range of $85.32–$104.92, and its market capitalization is about $12.4 billion. That is being favored, not ignored.

  It is not because investors cannot look far enough ahead. The market has already priced in the forward growth narrative of Arizona in-migration, data center high-load demand, and 5%–7% long-term growth. The evidence is that its dividend yield is about 3.66%, below the roughly 4.54% 10-year Treasury yield. The market is willing to accept an immediate yield below the risk-free rate precisely because it is paying a premium for future growth. That is looking too far and pricing the stock fully, not failing to look far enough.

  So the honest conclusion is that PNW does not have hidden value the market has failed to realize. If there is something the market may not have fully appreciated, it is actually the negative side: full-scope free cash flow has been negative for years, growth depends heavily on external financing and dilution (about -$820 million in 2025, as shown in the report), and incremental returns are capped by regulated ROE. These less glamorous truths may not be fully reflected in the optimism, but that points to an expensive stock, not a stock waiting to rise.

  Now answer the implied question: what could become the narrative inflection point? There is a clear event-driven, two-way inflection point: the ACC's final ruling on the 2025 APS rate case, in which the company requests a net revenue increase of about $694 million, a first-day bill impact of about 14.75%, an ROE of 10.70%, and a formula rate adjustment mechanism (FRAM). The report text's "611 million/10.75%" differs from the company's disclosed basis, so the official filing should be used.

  Upside inflection: if the ACC grants an outcome close to the request, including a higher ROE and FRAM implementation to reduce regulatory lag, it would validate the growth narrative, support the current price, and potentially open some upside.

  Downside inflection, which must be taken just as seriously: if the ruling is conservative, with a lower ROE, no FRAM, or a slower recovery schedule, the "regulated growth stock" narrative could quickly turn into a story of spending more, recovering slowly, and issuing more dilutive financing. Since there is no margin of safety at the current price, the correction could be painful. Other possible negative inflection points include load growth staying below the 4%–6% target for consecutive periods, a credit-rating downgrade, large C&I customers canceling projects or shifting to self-supply, or a major wildfire/nuclear incident.

  The honest conclusion: the answer for PNW is not that the market has missed it and the value is waiting to be discovered. It is that the market has largely understood the story, the price is full, and a regulatory event will confirm or refute the narrative. The true inflection point is the 2025 rate-case decision. It is two-way, with potential to validate the upside or expose the downside. This is also the fundamental logic behind the report's Watch rating and its recommendation to wait for a better price or more clarity on the rate case. I agree with that judgment.

  Jun 10, 2026