---
schema_version: "secwatch.filing_event.v1"
accession: "0000764622-26-000040"
form_type: "8-K"
ticker: "PNW"
cik: "0000764622"
company_name: "PINNACLE WEST CAPITAL CORP"
filed_at: "2026-08-04T12:18:37+00:00"
generated_at: "2026-08-04T12:20:35.454607+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Pinnacle West Q2 net income $178.6M ($1.43 EPS) vs $192.6M ($1.58) YoY; reaffirms FY2026 guidance $4.55-$4.75

## Summary
- Net income $178.6M ($1.43 diluted EPS) vs $192.6M ($1.58) in Q2 2025, down ~$14M.
- Higher interest charges, depreciation, and lower transmission revenues drove decline; partially offset by weather, customer growth, lower O&M.
- Residential customer growth 2.1%; weather-normalized sales up 5.6%; total sales up 9.6% due to early summer heat.
- Reaffirmed 2026 EPS guidance $4.55-$4.75 on weather-normalized basis.
- Announced plan to convert two retired coal units at Cholla to natural gas (380 MW) by 2029, subject to regulatory approvals.

## SEC filing metadata
- accession: 0000764622-26-000040
- form_type: 8-K
- ticker: PNW
- cik: 0000764622
- company_name: PINNACLE WEST CAPITAL CORP
- filed_at: 2026-08-04T12:18:37+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/764622/000076462226000040/0000764622-26-000040-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/7286/000076462226000040/pnw-20260804.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000764622-26-000040
- JSON: https://secwatch.observer/filing/0000764622-26-000040.json
- Plain text: https://secwatch.observer/filing/0000764622-26-000040.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.