Exhibit 99.1 Icahn Enterprises L.P. (Nasdaq: IEP) Today Announced Its First Quarter 2024 Financial Results Sunny Isles Beach, Fla, May 8, 2024 – · First quarter net loss attributable to IEP of $38 million, an improvement of$232 million over prior year quarter · First quarter Adjusted EBITDA attributable to IEP of $134 million, an increase of$39 million over prior year quarter · Indicative Net Asset Value was approximately $5 billion as of March 31, 2024, an increase of$194 million compared to December 31 ...