Pinnacle West brought in more revenue and kept less of it.
In the three months ended June 30, revenue rose 7.1% to $1.5 billion from $1.4 billion a year earlier. Operating income edged down to $305.7 million, and diluted EPS fell 9.5% to $1.43. The business grew at the top line; the earnings attached to that growth did not.
The margin moved from 22.6% to 21.0%. Diluted shares also rose 2.2%, which spread the lower operating result across more shares. Cash fell from $18.8 million to $9.1 million, leaving the latest reported period with a very specific tension: more customer revenue, less room showing up in the headline profit and cash figures.
Pinnacle West says the pressure is partly financing-related. Interest charges, net of the allowance for funds used during construction, were $18 million higher for the three months, primarily because debt balances were higher. The company also reported $5 million less in other income and expense, primarily from lower PSA interest income and higher other expenses.
The cash numbers add another layer. Operating cash flow fell $34 million to $629 million, with the company pointing to higher fuel and purchased-power payments, higher interest paid on debt, and higher tax payments. Electric-revenue receipts rose $61 million, but that increase did not fully offset the outflows.
Pinnacle West described the operating-cash change this way:
"Pinnacle West’s consolidated net cash provided by operating activities was $629 million in 2026 compared to $663 million in 2025, a decrease of $34 million in net cash provided, primarily due to $68 million in higher payments for fuel and purchased power costs, $35 million in higher interest paid on debt, net of amounts capitalized, and $14 millio n higher payments for other taxes paid; partially offset by $61 million higher cash receipts from electric revenues and $22 million in higher working capital, net."
10-Q 2026-08-04
The plain-English version is less dramatic than the EPS line, but more useful: customer receipts improved while the cost of serving and financing the system took a larger bite.
Financing cash also declined, to $574 million from $605 million. The consolidated comparison was shaped by a $775 million net decrease in short-term borrowings, partly offset by $297 million more in long-term borrowings. That is a change in funding mix, not a clean cash-generation story.
"Pinnacle West’s consolidated net cash provided by financing activities was $574 million in 2026 compared to $605 million in 2025, a decrease of $31 million in net cash provided primarily due to a net decrease of $775 million in short-term borrowings; partially offset by a $450 million decrease in long-term debt repayments and a $297 million increase in long-term borrowings."
10-Q 2026-08-04
Pinnacle West's annual results show a business that has expanded revenue from $3.6 billion in 2017 to $5.3 billion in 2025, while its latest annual operating margin reached 20.0%. The filing history also repeatedly links revenue growth to commercial and industrial customers, including new data centers and large manufacturing customers. That demand may be arriving, but this report shows the financing bill arriving alongside it.
At the latest annual balance-sheet snapshot, net debt was $9.2 billion. Pinnacle West's next quarterly report would add the missing comparison: whether interest charges and operating cash flow continue at these latest levels as the borrowing mix changes.
The unresolved tension is simple: revenue is growing, but profit and cash are not keeping pace.
Pinnacle West's August 4, 2026 10-Q reports higher revenue alongside lower operating income, EPS, and operating cash flow.