Perdana Petroleum Berhad is an investment holding company, which is engaged in the provision of administrative and management services to its subsidiaries. The Company provides offshore marine services for the upstream oil and gas industry. It is involved in the provision of vessels for the upstream oil and gas industry, ranging from towing, mooring, and anchoring of non-self-propelled marine vessels; transportation of drilling equipment, production chemicals and project materials to engineering and workshop facilities onboard. It owns and operates a fleet of vessels that’s consist of anchor handling tug supply vessels, accommodation workboats and work barges to support a range of offshore activities from exploration, development, facilities installation, hook-up and commissioning, production, operation, and maintenance. Its subsidiaries include Intra Oil Services Berhad, Ampangship Marine Sdn. Bhd., Perdana Nautika Sdn. Bhd., Perdana Neptune Limited, and Perdana Pluto Limited.