Announcement PDF Ocean Sciences Ltd | ASX: OSS | 1 October 2026 Ocean Sciences Ltd Page 1 of 3 Ocean Sciences Finalises Development Plan for Takalar Seaweed Innovation Centre Highlights • Ocean Sciences Ltd has finalised the development plan for its Seaweed Innovation and Application Centre in Takalar Regency, South Sulawesi. • The plan establishes a staged pathway covering regulatory approvals, construction and fit-out, operational commissioning and commencement of activities at the Centre. • Planned infrastructure includes onshore seaweed cultivation tanks, existing in-ground aquaculture pools, seaweed production and processing facilities and a working laboratory. • The Centre is intended to integrate the Company’s cultivation, production and research activities at a single site and progressively bring selected externally conducted R&D activities in-house. • The Company intends to update the market as material construction, regulatory and operational milestones are achieved. The Board of Ocean Sciences Ltd (ASX: OSS) (OSS, Ocean Sciences or Company) a leading commercial seaweed supply, research and development company, is pleased to advise that it has finalised the development plan for the Company’s Seaweed Innovation and Application Centre at Laikang Village, Takalar Regency, South Sulawesi (Centre). The plan follows the recently announced extension of the approximately 3.4-hectare site lease until April 2031, providing medium-term certainty to develop and operate the Centre. At the end of the extended term, the Company may seek a further five-year extension or purchase the site on terms to be agreed with the lessor. Development Plan The development plan establishes three principal workstreams for the development and commissioning of the Centre: • Regulatory Approvals The Company is progressing the approvals required for the development and operation of the Centre. Applications are planned for the approvals applicable to the Centre’s final design and activities, including: Ocean Sciences Ltd | ASX: OSS | 1 October 2026 Ocean Sciences Ltd Page 2 of 3 • environmental approval; • building approval; • certification of proper function following construction; • aquaculture and fisheries business approvals; and • installation and testing of cultivation, processing and laboratory equipment. The precise approvals required, and their timing, will depend on the final design, scale and activities undertaken at the Centre. • Construction and Fit-Out Subject to receipt of the applicable approvals, the construction program is intended to include: • site preparation and supporting infrastructure; • construction and installation of onSshore seaweed cultivation tanks; • establishment of seaweed production, drying, processing and storage facilities; • construction and fit-out of the working laboratory; • installation of utilities and water-management systems; and • installation and testing of cultivation, processing and laboratory equipment. Construction will be staged to align expenditure and site activity with regulatory approvals and operational priorities. • Operational Commissioning Following construction and fit-out, the Company intends progressively to: • commission the cultivation tanks and supporting systems; • commence cultivation and production activities; • commission the laboratory and its equipment; • implement operating, safety and environmental procedures; • engage students and other participants under the Company’s collaboration with the Maritime Institute of Technology and Business Balik Diwa Makassar; and • transfer selected currently out-sourced research and development activities to the Centre. Market Updates The development plan provides management with a structured implementation framework and establishes measurable construction, regulatory and operational milestones. The Company intends to inform the market as material milestones are achieved, including receipt of key approvals, Ocean Sciences Ltd | ASX: OSS | 1 October 2026 Ocean Sciences Ltd Page 3 of 3 commencement and completion of principal construction stages, installation and commissioning of material equipment and commencement of operations at the Centre. – 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