The World Bank's Global Seaweed New and Emerging Markets Report 2023 (research by Hatch Innovation Services) sizes ten emerging seaweed markets at up to US$11.8 billion by 2030, with the nearest-term markets — biostimulants, animal feed, pet food and methane-reduction additives — at US$4.4 billion. Every one of those markets starts with the same step: turning wet, perishable coastal biomass into a stable, specified ingredient.

That step is where projects stall. Hatch and FAIRR point to reliable biomass supply as the sector's biggest bottleneck outside Asia — and biomass only becomes supply once it is harvested, stabilised and processed to a buyer's specification. Sirputis builds exactly that layer: seeding and harvesting equipment on the supply side, and modular seaweed processing equipment and biorefineries on the processing side.

Three things make this a seaweed biorefinery investment rather than a research bet. First, the equipment is already delivered and running — a 6,000 t/y design-capacity plant above the Arctic Circle, a pilot line for SINTEF, a seeder tested at sea. Second, modular deployment: a standard module is fabricated in Šiauliai and commissioned in months, so capacity follows demand instead of preceding it. Third, four revenue layers per module — equipment sale, protocol licence, service and monitoring, optional downstream upside — so growth does not require Sirputis to own every plant.

Blended finance and impact capital are the natural co-investors: the same modules that a processor buys are what a development funder pays for in a coastal programme, which is why both tracks sit on this page.