Exhibit 99.1 Alto Ingredients, Inc. Reports First Quarter 2024 Results – Improved Q1 2024 Gross Profit by $0.8 Million, Net Loss by$1.4 Million and Adjusted EBITDA by $3.4 Million over Q1 2023 – Pekin, IL, May 6, 2024 – Alto Ingredients, Inc. (NASDAQ: ALTO), a producer and distributor of renewable fuel and essential ingredients and the largest producer of specialty alcohols in the U.S., reported its financial results for the quarter ended March 31, 2024. For the first quarter of 2024, gross loss improved b ...