Fremantle Seaweed

Based in Fremantle, Australia, Fremantle Seaweed specializes in cultivating red seaweed to provide sustainable feed solutions aimed at reducing methane emissions in livestock, particularly cattle. Fremantle Seaweed focuses on the cultivation of Asparagopsis, a red seaweed known for its significant methane emission reduction capabilities. The company was established with the aim of addressing environmental challenges posed by livestock farming. Fremantle Seaweed is headquartered in Fremantle, Australia.

The latest funding activity includes a Seed round in December 2025, where Fremantle Seaweed raised USD 2. 3 mn from Third Hemisphere and Hill Tribe Family Office, contributing to a total of USD 2. 3 mn raised to date. Fremantle Seaweed specializes in the cultivation of the red seaweed Asparagopsis, scientifically validated by CSIRO to reduce methane emissions from cattle and other ruminant livestock by over 80%.

The company's core product is designed to be integrated into livestock diets, providing a sustainable solution for greenhouse gas emissions in agriculture. This product is targeted at cattle farmers and livestock producers in key markets such as the United States, Brazil, and Australia, focusing on eco-friendly practices to meet regulatory standards. Fremantle Seaweed generates revenue through direct sales and partnerships within the agricultural sector, particularly through B2B transactions with cattle farmers and livestock producers. The company supplies Asparagopsis as a feed supplement, with pricing based on volume agreements.

This model fosters long-term relationships with clients dedicated to sustainable practices, driving demand for its flagship offerings. In December 2025, Fremantle Seaweed secured USD 2. 3 mn in Seed funding intended to support the development of its 3,000ha North-West Hub. The company plans to expand its product offerings and is currently engaged in developing new solutions aimed at further reducing methane emissions.

Additionally, Fremantle Seaweed aims to penetrate new markets, particularly in regions with intensive beef production, to bolster its client base and enhance its impact on greenhouse gas emissions reduction.