Regulated electric utility serving 1.4M customers in Arizona via subsidiary APS. Owner/operator of Palo Verde nuclear plant. AGI Score: 9/10. The first regulated utility in our analysis -- the framework here applies to ALL utilities (OGE, D, ED, AEP, AES). | Analysis date: 2026-03-12
PNW scored 9/10 on AGI impact -- one of the highest among regulated utilities. Arizona (especially Phoenix metro) is a top-3 data center growth market in the US, alongside Northern Virginia and Dallas-Fort Worth. APS is already seeing incremental large load requests that "far exceed available generation and transmission resource capacity" (10-K, direct quote). The company is building 2,000 MW of new gas generation, has a new "subscription model" where data centers fund their own infrastructure, and projects 5-7% annual load growth through 2030 (vs the typical utility 1-2%). At P/TB of 1.73 and 18% from 52-week low, it may not be cheap enough yet -- but understanding the regulated utility model here is worth more than the single stock.
Understanding how a regulated utility makes money is essential before analyzing ANY utility (PNW, OGE, D, ED, AEP, AES). The model is fundamentally different from every other type of business. Once you understand it, utility investing becomes much simpler -- and you'll see why data centers are such a massive catalyst.
A regulated utility does NOT operate in a free market. It is a legal monopoly granted by the state. In exchange for being the sole provider of electricity in a territory, the utility agrees to:
The regulator (in Arizona's case, the Arizona Corporation Commission or ACC) determines how much the utility can charge customers. This is done through rate cases -- formal proceedings where the utility requests a rate increase and proves its costs.
Where:
The key insight: The utility's earnings are driven by the SIZE of the rate base multiplied by the allowed ROE. Want to grow earnings? Grow the rate base. The allowed ROE is set by regulators and changes slowly. The rate base grows when the utility invests in infrastructure.
| Factor | Normal Utility Growth | Data Center-Driven Growth |
|---|---|---|
| Load growth | 1-2% per year | 5-7% per year |
| Rate base growth | 5-6% per year | 8-12% per year |
| EPS growth | 5-7% per year | 7-10% per year |
| CapEx required | Moderate | Massive (generation, transmission, distribution) |
| Capital needs | Fund from earnings | Dilutive equity issuance likely |
The catch: utilities can only earn the returns regulators allow, and rate cases take 1-2 years to process. The utility spends money NOW but doesn't get to charge for it until the rate case is decided. This gap is called regulatory lag. PNW is trying to address this with a Formula Rate Adjustment Mechanism (FRAM) that automatically adjusts rates annually between rate cases.
This makes utilities the SAFEST category in the stock market. The downside is that the upside is also capped by regulation. You can't earn monopoly profits -- you earn the allowed return. The exception is when rate base growth accelerates dramatically, which is exactly what data centers do.
Pinnacle West is a holding company. Its only significant subsidiary is Arizona Public Service Company (APS), Arizona's largest electric utility. Everything flows through APS.
| Attribute | Detail |
|---|---|
| Customers | ~1.4 million retail customers |
| Service Territory | 11 of Arizona's 15 counties, including Phoenix metro |
| Employees | 6,610 |
| Generation Capacity (owned/leased) | 6,257 MW regulated |
| Key Asset: Palo Verde Nuclear | ~1,146 MW entitlement (29.1% ownership), largest US nuclear plant |
| Rate Base (2025) | $12.5 billion (original cost) |
| Total Assets | $30.0 billion |
| Regulator | Arizona Corporation Commission (ACC) |
| FY End | December 31 |
APS is actively building new generation to meet data center and manufacturing demand:
| Category | MW | Status |
|---|---|---|
| Existing owned/leased capacity | 6,257 | Operating |
| Battery storage (procured via 2023 ASRFP) | 3,606 | Coming online 2026-2028 |
| Solar (procured via 2023 ASRFP) | 2,649 | Coming online 2026-2028 |
| Natural gas (procured via 2023 ASRFP) | 517 | Coming online 2026-2028 |
| Wind (procured via 2023 ASRFP) | 500 | Coming online 2026-2028 |
| Redhawk combustion turbines | 397 | Expected 2028 |
| Sundance combustion turbines | 90 | In service 2025 |
| Planned new flexible gas generation | 2,000 | For data centers + growth |
| Gas tolling agreement extension | 600 | 2027, extended to 2038 |
PNW has developed something genuinely novel for the utility industry: a subscription model for large load customers. This is critical and worth understanding in detail:
Why this matters: Traditional utility capex is funded by ALL ratepayers, creating political tension when big new customers require billions in infrastructure. The subscription model separates data center infrastructure costs from regular customers. This is politically smart -- it removes the main objection to serving data centers (that regular customers would pay higher rates). It also de-risks the investment for PNW because the customer is contractually committed before the utility builds.
APS has created a formal queue for large load customers. The 10-K states: "These incremental requests for service by large load customers far exceed available generation and transmission resource capacity in the Southwest region for the foreseeable future."
The queue "identifies and prioritizes projects while maintaining system reliability and affordability for existing APS customers." This is exactly the dynamic we described in our data-center-power knowledge: demand far outstrips supply, creating a structural scarcity that benefits the utility.
| Metric | Value | Source |
|---|---|---|
| 2026 retail electricity sales growth | 4.0-6.0% | PNW projection |
| Average annual growth through 2030 | 5.0-7.0% | PNW projection |
| Data center/manufacturing contribution to 2026 growth | 3.0-5.0% | PNW projection |
| Data center/manufacturing contribution to avg growth thru 2030 | 4.0-6.0% | PNW projection |
| 3-year average retail electricity sales growth (through 2025) | 3.9% | Historical (weather-adjusted) |
| Typical US utility load growth | 1-2% | Industry average |
| Year | Revenue ($M) | Operating Inc ($M) | Net Income ($M) | EPS (Diluted) | Dividend/Share | Payout Ratio |
|---|---|---|---|---|---|---|
| 2016 | $3,498* | $802* | $487* | $4.35* | $2.78 | 64% |
| 2017 | $3,498* | $761* | $489* | $4.35* | $2.98 | 69% |
| 2018 | $3,691* | $823* | $511* | $4.54* | $3.08 | 68% |
| 2019 | $3,614* | $785* | $478* | $4.24* | $3.17 | 75% |
| 2020 | $3,587 | $788 | $570 | $5.05 | $3.29 | 65% |
| 2021 | $3,804 | $805 | $636 | $5.62 | $3.35 | 60% |
| 2022 | $4,324 | $732 | $501 | $4.42 | $3.43 | 78% |
| 2023 | $4,696 | $825 | $519 | $4.56 | $3.47 | 76% |
| 2024 | $5,125 | $1,012 | $626 | $5.39 | $3.53 | 65% |
| 2025 | $5,340 | $1,068 | $632 | $5.18 | $3.58 | 69% |
* Years 2016-2019: XBRL revenue data shows APS subsidiary only in some years; consolidated figures approximated from 10-K filings. EPS figures use diluted shares outstanding from XBRL. Revenue accounting change in 2020.
Key observations:
| Item | FY2020 | FY2022 | FY2024 | FY2025 | 5yr Change |
|---|---|---|---|---|---|
| Total Assets | $20.0B | $22.7B | $26.1B | $30.0B | +50% |
| PP&E (net) | $13.7B | $14.5B | $16.8B | $18.4B | +34% |
| Stockholders' Equity | $5.8B | $6.2B | $6.9B | $7.1B | +22% |
| Long-Term Debt | $6.3B | $7.7B | $8.1B | $9.2B | +46% |
| Total Debt | $6.3B | $7.7B | $8.1B | $14.3B | +127% |
| Goodwill | $0 | None | |||
| Intangible Assets | $283M | $259M | $591M | $576M | Software |
| Cash | $60M | $5M | $4M | $7M | Minimal |
| Debt-to-Equity | 1.09x | 1.25x | 1.17x | 1.30x | Rising |
Stockholders' Equity: $7,087M - Goodwill: $0 - Intangibles: $576M = Tangible Book Value: $6,511M
Tangible Book per Share: $6,511M / 120.9M shares = $53.86/share
Current Price / Tangible Book: $101 / $53.86 = 1.87x. Not cheap by absolute standards, but in line with utilities with above-average growth (typical range: 1.3-2.5x for utilities).
| Year | Operating CF | CapEx | Free Cash Flow | Dividends Paid* | FCF After Divs |
|---|---|---|---|---|---|
| 2020 | $966M | ($1,327M) | ($361M) | ($371M) | ($732M) |
| 2021 | $860M | ($1,473M) | ($613M) | ($378M) | ($991M) |
| 2022 | $1,241M | ($1,707M) | ($466M) | ($388M) | ($854M) |
| 2023 | $1,208M | ($1,846M) | ($638M) | ($394M) | ($1,032M) |
| 2024 | $1,610M | ($2,249M) | ($639M) | ($402M) | ($1,041M) |
| 2025 | $1,805M | ($2,625M) | ($820M) | ($420M*) | ($1,240M) |
*Dividends estimated from per-share rate x average shares outstanding
This is normal for a high-growth utility. CapEx ($2.6B) far exceeds operating cash flow ($1.8B). The ~$800M annual FCF deficit must be funded by issuing new debt and new equity. PNW opened a $900M ATM (at-the-market) equity program in November 2024 and has ~$700M remaining. They also do equity infusions into APS (limited to 2.5% of APS total assets per year on a 3-year rolling average).
Implication: Fast rate base growth requires capital. Capital comes from debt (increasing leverage) and equity (diluting existing shareholders). This is the fundamental trade-off of a high-growth utility: faster rate base growth = faster earnings growth, but also more dilution. The net benefit to shareholders depends on whether the return on new investment (9-10% ROE) exceeds the cost of new capital (WACC 7.6%).
| Category | 2026E | 2027E | 2028E | 3-Year Total |
|---|---|---|---|---|
| Gas & Other Generation | $635M | $550M | $490M | $1,675M |
| Nuclear Generation | $170M | $185M | $215M | $570M |
| Renewables & Storage | $20M | $5M | $5M | $30M |
| Distribution | $765M | $795M | $750M | $2,310M |
| Transmission | $550M | $695M | $860M | $2,105M |
| Other | $460M | $420M | $380M | $1,260M |
| Total APS CapEx | $2,600M | $2,650M | $2,700M | $7,950M |
On June 13, 2025, APS filed for a net base rate increase of $579.5 million (13.99% increase). This addresses a total base revenue deficiency of $662.4 million. The hearing is scheduled for May 2026, with new rates expected in the second half of 2026.
| Item | Detail |
|---|---|
| Net rate increase requested | $579.5M (13.99%) |
| Total revenue deficiency | $662.4M (offset by adjustor transfers) |
| Proposed Rate Base | $12.5 billion (original cost) |
| Proposed ROE | 10.70% (vs current 9.55%) |
| Proposed WACC | 7.63% |
| Capital Structure: Debt | 47.65% at 4.26% |
| Capital Structure: Equity | 52.35% at 10.70% |
| FRAM proposal | Formula Rate Adjustment Mechanism to reduce regulatory lag |
| Effective date requested | Second half 2026 |
| Hearing date | May 2026 |
| Item | Requested | Approved (Feb 2024) |
|---|---|---|
| Revenue increase | -- | $491.7M |
| ROE | -- | 9.55% |
| Fair value increment return | -- | 0.25% |
| Effective fair value rate of return | -- | 4.39% |
| Rates effective | -- | March 2024 |
The most important item in the 2025 Rate Case is the FRAM (Formula Rate Adjustment Mechanism). If approved, this would allow APS to automatically adjust rates annually between rate cases, reducing regulatory lag from 2-3 years to ~1 year. This would significantly improve PNW's ability to earn its allowed ROE in a fast-growth environment. The ACC approved a formula rate policy statement in December 2024, but a lawsuit challenging its authority was filed in March 2025. The legal outcome is uncertain.
APS filed a 2026 Ten-Year Transmission Plan with the ACC, projecting:
| Metric | Value |
|---|---|
| Current Annual Dividend | $3.64/share |
| Current Yield | 3.6% |
| Payout Ratio (FY2025) | ~69% |
| 5-Year Dividend CAGR | ~1.7% |
| 10-Year Dividend CAGR | ~2.5% |
| Year | Annual DPS | YoY Growth |
|---|---|---|
| 2020 | $3.29 | -- |
| 2021 | $3.35 | 1.8% |
| 2022 | $3.43 | 2.4% |
| 2023 | $3.47 | 1.2% |
| 2024 | $3.53 | 1.7% |
| 2025 | $3.58 | 1.4% |
| 2026 (annualized) | $3.64 | 1.7% |
Floor price confidence: VERY HIGH. This is the safest category of company to invest in.
The core driver for a utility is Rate Base x Allowed ROE = Earnings on Equity. Let's project forward:
| Scenario | Rate Base (2030E) | Allowed ROE | Equity Portion | Earnings on Equity | Net Income* | Shares* | EPS |
|---|---|---|---|---|---|---|---|
| Base Case | $20B | 9.5% | 52% | $988M | $890M | 135M | $6.59 |
| Bull Case | $25B | 10.5% | 52% | $1,365M | $1,230M | 140M | $8.79 |
| Maximum Bull | $30B | 10.5% | 52% | $1,638M | $1,475M | 145M | $10.17 |
*Net income adjusted down ~10% for parent-level costs. Shares assume continued equity issuance (~3-4%/year dilution).
Now let's compute the bull case market cap:
| Scenario | 2030 EPS | P/E Multiple | 2030 Stock Price | 2030 Market Cap |
|---|---|---|---|---|
| Base Case (20x P/E) | $6.59 | 20x | $132 | $17.8B |
| Bull Case (22x P/E) | $8.79 | 22x | $193 | $27.0B |
| Maximum Bull (25x P/E) | $10.17 | 25x | $254 | $36.8B |
Plus dividends: At $3.64/share growing ~3-5%/year, you'd collect roughly $22-25/share in cumulative dividends over 5 years.
| 2030 Scenario | 2030 Price + Divs | 10x Entry Price | vs Current ($101) |
|---|---|---|---|
| Base Case ($132 + $22 divs) | $154 | $15.40 | -85% |
| Bull Case ($193 + $24 divs) | $217 | $21.70 | -79% |
| Maximum Bull ($254 + $25 divs) | $279 | $27.90 | -72% |
To get 10x, you need to buy at $15-28/share. PNW was last at $28 in... never. The 52-week low is $85. The all-time low (in recent decades) was around $50-60. A regulated utility simply cannot drop to $15-28 unless there is a catastrophic, company-specific event (like PG&E's wildfire liability, which is unique to California).
This is the fundamental truth about utilities: they are 2-3x investments, not 10x investments. The guaranteed rate of return caps the upside just as it floors the downside. What you get is:
That's not 10x. But it might be the best risk-adjusted return in the market if bought at the right price.
| Level | Price | P/E (FY25) | Yield | P/TB | Rationale |
|---|---|---|---|---|---|
| Very Safe (Floor) | $50-60 | 10-12x | 6.0-7.3% | 0.93-1.11x | Trough P/E for utilities, at or below tangible book. Would require severe recession + regulatory problems. You almost cannot lose money here. |
| Attractive Entry | $70-80 | 13-15x | 4.6-5.2% | 1.30-1.49x | Below historical average multiple, meaningful yield. Good risk/reward. 5-year total return ~12-18% annually. |
| Fair Value | $95-105 | 18-20x | 3.5-3.8% | 1.76-1.95x | Current range. Priced for normal utility growth. If data center thesis plays out, upside surprise. If not, fair return. |
Current price ($101) is at fair value. You're not getting a discount for the data center optionality -- the market already knows about Arizona's data center growth. To get an attractive entry, you'd want a pullback to $70-80, which could happen in a market sell-off, a rate case disappointment, or general utility sector rotation.
| Risk | Severity | Probability | Impact |
|---|---|---|---|
| Rate case disappointment (lower ROE approved) | Medium | 30% | EPS growth slows, stock drops 10-15% |
| Data center demand doesn't materialize as projected | Medium | 20% | Rate base growth slower, capex wasted, stranded costs |
| Equity dilution exceeds earnings growth | Medium | 25% | EPS stagnates despite revenue growth |
| Interest rate environment stays high | Medium | 35% | Cost of debt rises, squeezes earnings |
| Arizona wildfire risk (PG&E-style liability) | High if hit | 5% | Catastrophic but very unlikely -- Arizona is desert, less wildfire exposure than CA |
| FRAM lawsuit blocks formula rates | Medium | 40% | Regulatory lag persists, harder to earn allowed ROE |
| Water scarcity in Arizona (Palo Verde needs water) | Medium | 10% | Long-term operational risk, but Palo Verde uses treated wastewater, not potable water |
| Political/regulatory hostility to utilities | Low | 10% | ACC composition changes, less favorable treatment |
How PNW compares to other utilities with high AGI scores in our universe:
| Ticker | Name | AGI Score | P/TB | Div Yield | P/E | Data Center Exposure |
|---|---|---|---|---|---|---|
| PNW | Pinnacle West | 9 | 1.73 | 3.6% | 20x | Phoenix metro -- top 3 DC market |
| OGE | OGE Energy | 9 | ~1.5 | ~4.0% | ~17x | Oklahoma -- growing DC presence |
| D | Dominion Energy | 9 | ~1.8 | ~4.5% | ~18x | Northern Virginia -- #1 DC market globally |
| ED | Consolidated Edison | 9 | ~1.6 | ~3.5% | ~18x | NYC metro -- large but constrained market |
| AEP | American Electric Power | 9 | ~1.9 | ~3.7% | ~17x | Ohio, Virginia -- significant DC presence |
| AES | AES Corporation | 7 | ~1.3 | ~6.0% | ~9x | More diversified, international exposure |
The 10x question for utilities: Bull case for PNW: $25-40B market cap. 10x entry: $2.5-4B. Utilities rarely trade at these distressed levels -- PNW's current ~$10B market cap is 2.5-4x above the 10x entry zone. The only way to get 10x from a utility is to buy during a severe crisis (like PG&E post-wildfire at $4/share). Under normal conditions, utilities are 2-3x investments at best. The value is in the safety and the income, not the growth.
| Year | Basic Shares (M) | Diluted Shares (M) | YoY Dilution |
|---|---|---|---|
| 2020 | 112.7 | 112.9 | -- |
| 2021 | 112.9 | 113.2 | 0.2% |
| 2022 | 113.2 | 113.4 | 0.2% |
| 2023 | 113.4 | 113.8 | 0.4% |
| 2024 | 113.8 | 116.2 | 2.1% |
| 2025 | 119.7 | 122.0 | 5.0% |
Note: Dilution accelerated sharply in 2024-2025 as PNW issued equity via the ATM program to fund capex. 5% dilution in 2025 is significant -- it means net income grew 1% but EPS actually fell 4%. Expect continued 3-5% annual dilution as long as the high-capex regime persists.