Exhibit 99.1 News Release FOR IMMEDIATE RELEASE Media: Investor Relations: May 2, 2024 Kevin Gundersen Ivan Marcuse The Woodlands, TX (281) 719-4627 (281) 719-4637 NYSE: HUN Huntsman Announces First Quarter 2024 Earnings First Quarter Highlights · First quarter 2024 net loss attributable to Huntsman of $37 million compared to a net income of$153 million in the prior year period; first quarter 2024 diluted loss per share of $0.22 compared to a diluted income per share$0.83 in the prior year period. · First ...