Who are we?

An Engineering Group and World Leader in Underground Storage for Liquid, Liquefied and Gaseous Hydrocarbons, CO2, Effluents, and other products such as CAES or Hydrogen.

Our corporate video about our services and expertise

Download our corporate brochure         Download our Activity Report

Founded in 1965, Geostock, whose shareholders are  Entrepose Group (Vinci Group) (90%) and Total (10%) owns subsidiaries and interests all over the world, offering their know-how in the field of underground storage.


A  Worldwide Organization

With a network of companies close to their clients, we are able to provide all the resources and expertise necessary to solve your problems quickly while providing top quality service.

Our subsidiaries and interests

UGS GmbH Germany
Geostock Sandia LLC – USA
Geostock Asia PTE Ltd – Singapore
Geostock do Brasil Ltda – Rio de Janeiro
Geostock de México SA de CV – México
Geogreen S.A. – France
Geosud S.A. – France


With strong Commitments

All personnel from Geostock companies work together to provide the best solutions to our clients while remaining committed to our Values and Principles, and our Safety and Quality Policies.

Our values

Are based on the Confidence that has been built over the history and that will be further developped in the future with all our stakeholders.

Our principles

  • Health, Safety, Security and Environmental Protection: a priority in all Geostock activities for design, construction and operation,
  • Customers through Professionalism, Technical Excellence, Audacity and Innovation,
  • Development of our main asset: Human Resources with a high level of Ethics and Integrity.