This bill, titled the Domestic Organic Investment Act of 2025, amends the Agricultural Marketing Act of 1946 to establish the Domestic Organic Investment Program . The program's primary purpose is to significantly increase the capacity and efficiency of the domestic organic product supply chain for producers, handlers, suppliers, and processors. It aims to modernize systems, improve compliance with regulatory standards, and expand infrastructure for storage, processing, aggregation, and distribution of certified organic products. The program will provide grants to eligible entities , which include certified organic producers, producer cooperatives, commercial entities, and Tribal governments, or those in transition to certification. These grants can support projects such as expanding storage and processing capacity or acquiring equipment, with maximum awards of $2,000,000 for expansion projects and $100,000 for equipment-only projects. Applicants are generally required to provide matching funds, though waivers may be available for beginning farmers, ranchers, and veterans, and the Secretary of Agriculture is authorized to appropriate necessary funds for fiscal years 2026 through 2030.