---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-388649"
form_type: "8-K"
ticker: "AA"
cik: "0001675149"
company_name: "Alcoa Corp"
filed_at: "2026-09-11T12:18:22+00:00"
generated_at: "2026-09-11T12:25:09.754390+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# South32 shareholders to vote Oct 15 on sale of aluminium assets to Alcoa

## Summary
- South32 general meeting set for 15 Oct 2026 (AWST); Resolution 7 seeks approval of sale of aluminium value chain to Alcoa.
- Deal per Umbrella Implementation Deed dated 30 Jun 2026; announced 1 Jul 2026; covers bauxite, alumina, and aluminium ops excluding Mozal.
- Alcoa filed Form S-4 on 1 Sep 2026; prospectus declared effective and filed with SEC on 8 Sep 2026.
- South32 board unanimously recommends 'For' Resolution 7, absent superior proposal and subject to independent expert conclusion.

## SEC filing metadata
- accession: 0001193125-26-388649
- form_type: 8-K
- ticker: AA
- cik: 0001675149
- company_name: Alcoa Corp
- filed_at: 2026-09-11T12:18:22+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1675149/000119312526388649/0001193125-26-388649-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1675149/000119312526388649/d23778d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-388649
- JSON: https://secwatch.observer/filing/0001193125-26-388649.json
- Plain text: https://secwatch.observer/filing/0001193125-26-388649.txt

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