---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-095989"
form_type: "8-K"
ticker: "PNW"
cik: "0000764622"
company_name: "PINNACLE WEST CAPITAL CORP"
filed_at: "2026-08-13T20:37:47+00:00"
generated_at: "2026-08-13T20:39:06.068472+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# APS issues $700M in notes: $100M 5.50% due 2035, $600M 6.25% due 2056

## Summary
- Arizona Public Service issued $100M of 5.50% Notes due 2035 and $600M of 6.25% Notes due 2056.
- Underwriting agreement dated August 10, 2026; total offering $700M under existing S-3 shelf.
- Estimated issuance expenses of $1,811,500, including $1.6M rating agency fees.
- Ninth and Thirty-Fourth Supplemental Indentures filed for the new notes.

## SEC filing metadata
- accession: 0001104659-26-095989
- form_type: 8-K
- ticker: PNW
- cik: 0000764622
- company_name: PINNACLE WEST CAPITAL CORP
- filed_at: 2026-08-13T20:37:47+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/764622/000110465926095989/0001104659-26-095989-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/7286/000110465926095989/tm2622461d5_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-095989
- JSON: https://secwatch.observer/filing/0001104659-26-095989.json
- Plain text: https://secwatch.observer/filing/0001104659-26-095989.txt

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