Announcement PDF Ocean Sciences Ltd | ASX: OSS | 21 October 2026 Ocean Sciences Ltd | ACN 009 104 330 Page 1 of 2 OCEAN SCIENCES SECURES FIRST COMMERCIAL SALE OF SPINOSUM SEAWEED TO CHINA Highlights • First commercial sale of Spinosum seaweed, expanding the Company's seaweed trading operations beyond Cottonii. • Purchase order for 25 metric tonnes of Spinosum seaweed from an existing Chinese customer. • Shipment has arrived in China - delivery to the customer subject to customs clearance and inspection. • Spinosum provides access to the iota-carrageenan market, a distinct market segment from the kappa-carrageenan market supplied by Cottonii. • Expansion into Spinosum broadens the Company's product oIering, addressable customer base and commercial growth opportunities. Ocean Sciences Ltd (ASX: OSS) (OSS, Ocean Sciences or Company) a leading commercial seaweed supply, research and development company, is pleased to advise that its Indonesian operating subsidiary, PT BPH Global Indonesia, has secured its first commercial sale of Eucheuma spinosum (Spinosum) seaweed, marking an important milestone in the expansion of the Company's seaweed trading operations. The Company has received a purchase order from an existing Chinese customer, Greenwich (China) Technology Development Limited, for the supply of 25 metric tonnes of Indonesian Spinosum seaweed. The shipment has arrived at Xiamen Port, China, following which it will be subject to the applicable customs inspection and clearance procedures before delivery to the customer. Expansion of Seaweed Trading Operations To date, the Company's seaweed trading activities have focused on Kappaphycus alvarezii (Cottonii), which is primarily used in the production of kappa-carrageenan. The addition of Spinosum represents a significant expansion of the Company's commercial product oXering. Spinosum is the principal raw material used in the production of iota-carrageenan, a distinct form of carrageenan utilised in a range of applications including dairy desserts, plant-based food products, personal care products and pharmaceuticals. Ocean Sciences Ltd | ASX: OSS | 21 October 2026 Ocean Sciences Ltd | ACN 009 104 330 Page 2 of 2 Cottonii and Spinosum are the two principal commercially cultivated carrageenan-producing seaweed species, together accounting for approximately 90% of the seaweed used in global carrageenan production. By expanding its trading activities to include Spinosum, Ocean Sciences is positioning itself to service a broader range of customers across the global carrageenan industry, leveraging its established Indonesian seaweed procurement network, quality control processes and export infrastructure. Managing Director of Ocean Sciences Ltd, Matthew Leonard, commented: "The Company's first commercial sale of Spinosum represents another important step in the development of our Indonesian seaweed trading business. Having established our trading operations around Cottonii, the addition of Spinosum enables us to participate in a separate and significant segment of the global carrageenan market. We believe that broadening our product oXering will create further opportunities to expand our customer base, increase trading volumes and strengthen our position as a supplier of Indonesian seaweed to international markets.” The Company will continue to pursue opportunities to expand its trading activities across both Cottonii and Spinosum as part of its broader strategy to develop a diversified and scalable international seaweed business. – ENDS – Authorised for release by: The Board of Ocean Sciences Ltd Corporate Media and Investor Relations Francesco Cannavo Peter Taylor Chairman, Ocean Sciences Ltd peter@nwrcommunications.com.au