Pinnacle West Capital Corporation (PNW) | The Buildout — AI Infrastructure
The Verdict
Pinnacle West Capital Corporation is the parent of Arizona Public Service, a regulated electric utility that generates, transmits, and distributes electricity in Arizona. In the AI infrastructure buildout, APS is the franchise grid operator that data centers and semiconductor fabs, including TSMC's North Phoenix campus, plug into.
| Market Cap | — |
| Revenue (TTM) | $5.5B |
| Revenue Growth | +4.8% |
| EBITDA Margin (TTM) | 45.1% |
| Net Debt | $15.1B |
| Earnings Beats | 4 of 7 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- Weather-normalized sales grew 9.6% in Q2 2026, above the 4–6% 2026 guidance range.
- C&I sales grew 12.7% in Q2 on top of 14.6% in Q1, while TSMC's power contribution was still flat year over year.
- Committed large C&I load of about 4.5 GW ramps beyond 2030, roughly half the new 9,164 MW system peak.
- TSMC raised its Arizona commitment to $265 billion and up to 12 fabrication and packaging facilities; its prior commitment was already over 1 GW of demand.
- Transmission capital has doubled twice in five years, with new FERC formula rates effective June 2026.
What We’re Watching
- Rate case final decision expected before year-end 2026; management's goal is to earn within 50 bps of allowed ROE by 2029.
- IRP filing moved to end of October 2026; it should provide the first detailed timing for the 4.5 GW ramp and TSMC's incremental $100B.
- Subscription-model special-rate contracts were still not filed as of Q2 2026 despite the prior 2026 target.
- Cholla conversion adds up to roughly $440 million capex mostly in 2027–2028 but is not in current guidance; in-service targeted for 2029.
The demand thesis is strengthening: sales growth is running well above guidance, and the largest named customer's main load contribution is still ahead. The earnings translation is the weak point—Q2 EPS declined despite strong sales on higher interest, D&A, and a transmission true-up. The open question is whether the rate case order expected before year-end closes the regulatory lag enough to convert this growth into earnings.
Earnings Beat
Q2 2026 reported EPS was $1.43, down $0.15 year over year, while weather-normalized sales grew 9.6% and C&I sales rose 12.7%. Management attributed the EPS decline to higher interest expense, higher depreciation and amortization, and a lower transmission revenue true-up tied to 2025. Q2 revenue and gross margin are not disclosed in the source; Q1 FY2026 audited revenue was $1,149.6 million with a 62.0% gross margin.
| Metric | Q1 FY2026 | Q4 FY2025 | Q1 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $1.1B | $1.1B | $1.0B | +11.4% |
| Gross margin | 62.0% | 18.3% | 34.1% | +2790bps |
| EBITDA | $641M | $383M | $308M | +108.2% |
| EPS | $0.27 | $0.13 | $-0.04 | −791.0% |
| Weather-normalized sales growth | 9.6% | 9.4% | n/a | — |
| C&I sales growth | 12.7% | 14.6% | n/a | — |
On August 2, we reached a new all-time peak demand record of 9,164 megawatts, exceeding last year's record by more than 500 megawatts.— Ted Geisler, CEO, August 4, 2026
Management tone: Management's tone was confident on demand and execution but measured on near-term financials. In Q2, executives explicitly attributed the EPS decline to financing and cost items rather than demand, and they declined to raise 2026 sales guidance despite two quarters of roughly 9% growth.
Management Guidance
Management reaffirmed 2026 EPS guidance of $4.55–$4.75 and said the company expects to finish at the top end of that range. 2026 weather-normalized sales growth guidance remained 4–6%. Long-term sales growth through 2030 remained 5–7%, with no formal raise. The Cholla conversion's up to roughly $440 million incremental capex is not included in current guidance.
Trajectory
The revenue trajectory is accelerating on a year-over-year basis: TTM revenue reached $5,457.3 million with 4.8% year-over-year growth, and Q1 FY2026 revenue of $1,149.6 million grew 11.4% year over year. Q1 FY2026 gross margin expanded to 62.0% from 34.1% a year earlier, though the company notes a prior-year one-time item and weather affected comparisons. Weather-normalized sales growth has run 9.4% in Q1 and 9.6% in Q2 2026 against 4–6% guidance, with C&I growth of 14.6% and 12.7%.
The Model
The model projects FY+1 revenue of $5,750 million with EBITDA of $2,501 million (43.5% margin), and FY+2 revenue of $6,550 million with EBITDA of $3,046 million (46.5% margin). Near-term revenue anchors on the disclosed 4.5 GW committed large-load ramp and current sales growth above guidance; FY+2 reflects continuing load growth and the transmission-heavy capex cycle.
| Metric | FY2025 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $5.3B | $5.8B | $6.5B |
| YoY Growth | — | +7.7% | +13.9% |
| EBITDA | $2.1B | $2.5B | $3.0B |
| EBITDA Margin | 39.9% | 43.5% | 46.5% |
Projections are the median of 5 independent model runs. The model’s revenue sits 9.6% above analyst consensus.
Management reaffirmed 2026 EPS guidance of $4.55–$4.75 and said the company expects to finish at the top end of that range. 2026 weather-normalized sales growth guidance remained 4–6%. Long-term sales growth through 2030 remained 5–7%, with no formal raise. The Cholla conversion's up to roughly $440 million incremental capex is not included in current guidance.
What Could Go Right — and Wrong
- A constructive rate case includes a forward-looking formula rate that narrows regulatory lag toward the 50-basis-point goal by 2029.
- The October IRP quantifies TSMC's incremental $100 billion commitment and the 4.5 GW ramp with near-dated load timing.
- First subscription-model filings convert a portion of the roughly 20 GW uncommitted queue into committed load.
- TSMC's planned up to 12 facilities produce demand meaningfully above the prior >1 GW anchor.
- Transmission revenue continues to compound under the new June 2026 FERC formula rates.
- Rate case order is unsupportive, leaving the earned/allowed ROE gap in place.
- Interest expense and D&A continue to outgrow sales, further compressing earnings.
- Subscription-model contracts slip further, delaying conversion of the roughly 20 GW queue.
- TSMC or hyperscaler capital spending slows, cooling the committed large-load ramp.
- All-source RFP awards come in expensive, raising the cost of serving growth.
Looking Ahead
Over the next 12 months, the controlling milestones are the rate case—initial briefs August 27, 2026, reply briefs September 11, and a final decision expected before year-end—along with the October IRP and RFP awards later in 2026. In 2027, the first Halo Vista tenant is expected in H1 and TSMC Fab 2 volume production is expected in H2.
- Aug 27, 2026Rate case initial briefs due — First formal arguments in the pending Arizona rate case.
- Sep 11, 2026Rate case reply briefs due — Final briefing round before the recommended order.
- End of October 2026IRP filing — First detailed timing for the 4.5 GW committed ramp and TSMC build-out.
- Later 2026All-source RFP awards — Resource contracts for service beginning 2029–2031; tests cost.
- Before year-end 2026Final rate case decision — Determines revenue requirement and any lag-reduction mechanism.
- H1 2027Halo Vista first tenant — First tenant expected at the roughly 20,000-acre mixed-use development.
Financials
Annual Summary
| Metric | FY2024 | FY2025 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $5.1B | $5.3B | $5.5B | +4.2% |
| Gross Margin | 40.5% | 33.8% | 40.7% | 673bps |
| EBITDA | $2.0B | $2.1B | $16.5B | +8.1% |
| EBITDA Margin | 38.4% | 39.9% | 45.1% | +145bps |
| Net Income | $609M | $617M | $654M | +1.3% |
| Free Cash Flow | −$639M | −$820M | −$4.4B | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)40.7%
- EBITDA Margin (TTM)45.1%
- Net Margin (TTM)12.0%
- ROIC5.3%
- FCF Conversion-40.3%
- SBC / Revenue0.2%
The Company
Pinnacle West Capital Corporation is an investor-owned electric utility holding company based in Phoenix, Arizona. Its principal subsidiary, Arizona Public Service, is Arizona's largest and longest-serving electric company and serves 11 of Arizona's 15 counties. APS operates a regulated electricity segment covering generation, transmission, and distribution, with a fleet anchored by the three-unit Palo Verde nuclear station, natural gas, coal, and oil units.
APS is a single-segment regulated utility with roughly 6,200 MW of generating capacity serving about 1.5 million homes and businesses. It earns through regulated retail tariffs, FERC formula-rate transmission recovery, and special large-load contracts. Generation assets are concentrated in Arizona, with Palo Verde about 50 miles west of Phoenix.
Business Segments
Competitive Landscape
The 10-K says APS faces varying degrees of competition from other investor-owned electric and gas utilities in Arizona, and names Southwest Gas Corporation. The source also describes APS as the regulated franchise utility where new data centers and fabs must interconnect, though pricing and recovery are set by the Arizona Corporation Commission and FERC.
- Southwest Gas CorporationNamed in APS's 10-K as among other investor-owned electric and gas utilities competing with APS in Arizona.
Supply Chain
APS is the regulated utility of first connection for Arizona load. It owns generation and transmission, and buys fuel, gas transport, and some contracted resources from third parties. No neighbor named PNW directly in the supply-chain read-through.
More on PNW: Earnings recap