---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-399499"
form_type: "8-K"
ticker: "AA"
cik: "0001675149"
company_name: "Alcoa Corp"
filed_at: "2026-09-23T20:33:30+00:00"
generated_at: "2026-09-23T20:34:13.331970+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Alcoa closes $2.6B senior notes offering to fund South32 acquisition cash consideration

## Summary
- Issued $1.5B of 6.625% notes due 2034 and $1.1B of 6.875% notes due 2036 via Alcoa subsidiaries.
- Net proceeds fund ~$3.1B cash portion of acquisition of South32's bauxite, alumina, aluminum assets.
- Terminated all remaining commitments under 364-day bridge term loan facility tied to acquisition.
- Acquisition still subject to South32 shareholder approval, regulatory approvals, other customary conditions.
- Special mandatory redemption of notes required if acquisition not completed by June 29, 2027 (or extended).

## SEC filing metadata
- accession: 0001193125-26-399499
- form_type: 8-K
- ticker: AA
- cik: 0001675149
- company_name: Alcoa Corp
- filed_at: 2026-09-23T20:33:30+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 2.03, 7.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1675149/000119312526399499/0001193125-26-399499-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1675149/000119312526399499/aa-20260923.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-399499
- JSON: https://secwatch.observer/filing/0001193125-26-399499.json
- Plain text: https://secwatch.observer/filing/0001193125-26-399499.txt

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