---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-267154"
form_type: "8-K"
ticker: "KALU"
cik: "0000811596"
company_name: "KAISER ALUMINUM CORP"
filed_at: "2025-11-05T23:59:59+00:00"
generated_at: "2026-05-17T00:28:23.044140+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Kaiser Aluminum closes $500M 5.875% senior notes due 2034; proceeds to redeem 4.625% 2028 notes

## Summary
- Closed offering of $500M aggregate principal of 5.875% senior notes maturing March 1, 2034.
- Interest payable semiannually on March 1 and Sept 1, first payment March 1, 2026.
- Net proceeds, with revolver borrowings/cash, to redeem all outstanding 4.625% senior notes due 2028.
- Notes redeemable at issuer's option on or after March 1, 2029 at specified prices.
- Up to 40% of notes may be redeemed before March 1, 2029 with equity offering proceeds at 105.875%.

## SEC filing metadata
- accession: 0001193125-25-267154
- form_type: 8-K
- ticker: KALU
- cik: 0000811596
- company_name: KAISER ALUMINUM CORP
- filed_at: 2025-11-05T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/811596/000119312525267154/0001193125-25-267154-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/811596/000119312525267154/d78226d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-267154
- JSON: https://secwatch.observer/filing/0001193125-25-267154.json
- Plain text: https://secwatch.observer/filing/0001193125-25-267154.txt

## Key facts
- Debt Financings
  KAISER ALUMINUM CORP incurred senior notes of $500,000,000 aggregate principal amount with Computershare Trust Company, N.A. at 5.875% per annum maturing March 1, 2034.
  - Instrument: senior notes
  - Principal: $500,000,000 aggregate principal amount
  - Counterparty: Computershare Trust Company, N.A.
  - Rate: 5.875% per annum
  - Maturity: March 1, 2034
  - Event: incurrence
  source text: issued $500,000,000 aggregate principal amount of its 5.875% Senior Notes due 2034
  evidence_url: https://www.sec.gov/Archives/edgar/data/811596/000119312525267154/0001193125-25-267154-index.htm

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