---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-049467"
form_type: "8-K"
ticker: "PNW"
cik: "0000764622"
company_name: "PINNACLE WEST CAPITAL CORP"
filed_at: "2025-05-15T23:59:59+00:00"
generated_at: "2026-05-21T06:39:39.011973+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Pinnacle West issues $800M in senior notes: $400M at 4.90% due 2028, $400M at 5.15% due 2030

## Summary
- Issued $400M of 4.90% Senior Notes due 2028 and $400M of 5.15% Senior Notes due 2030.
- Underwriting agreement and sixth supplemental indenture filed as exhibits to the 8-K.
- Estimated offering expenses total approximately $1.13 million, per Exhibit 99.1.

## SEC filing metadata
- accession: 0001104659-25-049467
- form_type: 8-K
- ticker: PNW
- cik: 0000764622
- company_name: PINNACLE WEST CAPITAL CORP
- filed_at: 2025-05-15T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/764622/000110465925049467/0001104659-25-049467-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/764622/000110465925049467/tm2513558d4_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-049467
- JSON: https://secwatch.observer/filing/0001104659-25-049467.json
- Plain text: https://secwatch.observer/filing/0001104659-25-049467.txt

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