---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-070960"
form_type: "8-K"
ticker: "PNW"
cik: "0000764622"
company_name: "PINNACLE WEST CAPITAL CORP"
filed_at: "2026-06-05T20:02:53+00:00"
generated_at: "2026-06-05T20:04:55.160850+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Pinnacle West issues $500M 4.650% Senior Notes due 2029

## Summary
- Issued $500,000,000 principal amount of 4.650% Senior Notes maturing June 1, 2029.
- Underwriting agreement dated June 1, 2026; offered under existing shelf registration (No. 333-277448).
- Estimated total offering expenses of $1,304,241, including $1,125,000 in rating agency fees.
- No specific use of proceeds disclosed in the filing.

## SEC filing metadata
- accession: 0001104659-26-070960
- form_type: 8-K
- ticker: PNW
- cik: 0000764622
- company_name: PINNACLE WEST CAPITAL CORP
- filed_at: 2026-06-05T20:02:53+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/764622/000110465926070960/0001104659-26-070960-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/764622/000110465926070960/tm2616946d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-070960
- JSON: https://secwatch.observer/filing/0001104659-26-070960.json
- Plain text: https://secwatch.observer/filing/0001104659-26-070960.txt

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