UK Court of Appeal Concludes Patent Case in Favour of Mara

Mara Renewables welcomes the UK Court of Appeal’s ruling in the long-running patent matter with dsm-firmenich, providing important clarity.

Today the UK Court of Appeal has dismissed dsm-firmenich’s appeal from a 2025 court judgment that one of its patents related to the production of microalgal docosahexaenoic acid (DHA) oil was invalid.

In the earlier March 2025 judgment, the UK High Court ruled that two of the three patents dsm-firmenich had asserted against Mara, relating to microalgal DHA oil, were invalid. A third patent was held to be valid, but that patent expired in 2023.

dsm-firmenich did not appeal the original invalidity decision on one patent but sought to overturn the invalidity decision on the second patent. As a result of the Court of Appeal’s ruling, the High Court’s original judgment stands, and the question of liability is now concluded in the United Kingdom.

“Mara appreciates the Court’s careful consideration of the issues over the lengthy course of these legal proceedings. We welcome the clarity this decision provides.” said Charles Perez, Vice President of Legal and Corporate Development at Mara.

Mara CEO and Board member Harry Boot added “Consumers benefit from having access to a broad range of great tasting, high quality precision fermentation derived omega-3 solutions and we believe we have the best tasting and highest quality omega-3 oil in the market, driven by the exceptional characteristics of our microalgal strains and our fermentation expertise. With this decision from the UK courts, we are now even more confident about Mara’s future.”

“With nearly 30 years of experience in omega-3 innovation, we remain committed to advancing sustainable, high-performance omega-3 solutions that support customer choices and innovation in the marketplace.”