The Domestic Organic Investment Act of 2025 establishes the Domestic Organic Investment Program within the Agricultural Marketing Act of 1946. This program aims to significantly increase the capacity of the domestic organic product supply chain for producers, handlers, suppliers, and processors. Its objectives include modernizing manufacturing and tracking systems, improving compliance with regulatory requirements, and expanding infrastructure for storage, processing, aggregation, and distribution of certified organic products. The program also seeks to facilitate market development for domestically produced organic goods and address supply chain bottlenecks, ultimately reducing reliance on organic imports. Under the program, the Secretary of Agriculture will provide grants to eligible entities, which include certified organic producers, cooperatives, commercial entities, and Tribal governments, or those in transition to certification. These grants can fund projects such as capacity expansion for storage, processing, and distribution (up to $2,000,000) or equipment-only projects (up to $100,000). Recipients are generally required to provide matching funds of 50% for capacity expansion or 25% for equipment-only projects, though these requirements may be waived or lowered for beginning farmers, ranchers, and veterans. The Act authorizes appropriations for fiscal years 2026 through 2030 to carry out these initiatives.