Exhibit 99.1 FOR IMMEDIATE RELEASE Investor Contact Media Contact Paul T. Luther Rob Morrison (412) 553-1950 (412) 553-2666 Paul.Luther@howmet.com Rob.Morrison@howmet.com Howmet Aerospace Reports First Quarter 2024 Results Record Quarterly Revenue, Up 14% Year Over Year; Strong Profit and Cash from Operations $150 Million Deployed for Common Stock Repurchases Full Year 2024 Guidance Increased First Quarter 2024 GAAP Financial Results · Revenue of$1.82 billion, up 14% year over year, driven by commercial ae ...