€7M Seed for Dionymer

Bordeaux, France, February 2, 2026 – Dionymer, a French industrial biotechnology company specializing in the development of biodegradable polymer materials derived from biowaste, announces a €7 million Seed funding round.

This round includes investments from UI Investissement, BNP Paribas Développement, BPI France (French Tech Seed), NACO (M Capital), as well as all its historical investors—IRDI, Aquiti, AFI Ventures, and Resiliance—who are renewing their support. The circular materials (PHA—Poly Hydroxy Alcanoates) produced by Dionymer in powder and pellet form have demonstrated optimal performance and provide a sustainable industrial alternative to replace polluting petrochemical polymers, addressing the transition challenges in the cosmetics, plastics, coatings, and textiles sectors.

This funding round follows the successful scaling of its technology, increasing production from 10 kg/year to 1 ton/year thanks to the installation of its preindustrial pilot in Mérignac, and achieving commercial readiness in its initial target markets. With this new funding, Dionymer is strengthening its R&D capabilities, launching the commercialization of its materials, and preparing for the next key phase of its industrialization: the implementation of an industrial demonstrator capable of producing 100 tons of biopolymers per year.

Since its inception, Dionymer has followed a rigorous industrial and commercial roadmap. The company is on a clear and controlled path toward building, in France, a plant with a capacity of at least 1,000 tons per year of biodegradable polymers derived from biowaste by 2030.

Thomas HENNEBEL, CEO Dionymer:"This fundraising round validates our industrial roadmap and gives usthe means to accelerate the market launch of high-performance,competitive circular materials. We are now entering the industrial demonstration phase with a clear ambition: to scale up and meet ourcustomers’ concrete needs."