PNW · 8-K · 20260804PR000040

Interest Rate Pressure

PINNACLE WEST CAPITAL CORP · 2026-08-04 · Importance 48 · Surprise 40

Higher interest charges were a primary factor reducing second-quarter 2026 results by approximately $14 million versus the prior year. Quarterly interest charges increased to $133.6 million from $113.5 million, an increase of approximately 17.7% year over year. The increase indicates continued pressure from the cost of debt capital and financing requirements.

Key facts

• The 2026 quarterly results reflect a decrease of about $14 million primarily as a result of higher interest charges; higher depreciation and amortization; and lower transmission service revenues. source