0001675149 2026-09-09 2026-09-09 0001675149 false 8-K 2026-09-09 ALCOA CORPORATION DE 1-37816 81-1789115 201 Isabella Street, Suite 500 Pittsburgh PA 15212-5858 412 315-2900 Not applicable true false false false Common Stock, par value $0.01 per share AA NYSE false