Transmark Holdings N.V. is the holding company of an international group of companies including Transmark N.V. (with its direct subsidiaries Transmark Services B.V., Transmark Renewable Products B.V., Transmark Subsea AS), and Dearman Engine Company Ltd. The primary activity of these companies is the co-ordination of the international and national activities of Transmark Holdings N.V. with regard to the exploration of geothermal energy, the trade of industrial components and subsea systems, the execution of directional drilling activities and the development and commercialisation of a zero emission engine. The company and its subsidiaries are operational in The Netherlands, The United Kingdom, Norway, Turkey and Chile.

The company is 100% family owned and is registered in Amsterdam, The Netherlands.
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