TGS Successfully Commenced an Active North Europe Summer Season

Oslo, Norway (May 9 2025) – TGS, a leading provider of energy data and intelligence, is pleased to announce a significant increase in acquisition activity in Northern Europe this summer. TGS has deployed a total of four acquisition vessels in the region; three seismic vessels and one offshore wind vessel, doubling the Company’s capacity compared to 2024.

All the three seismic streamer vessels have successfully mobilized, according to plan, and are currently engaged in production on 4D seismic contracts. These vessels will continue with additional 4D programs. TGS has been awarded a total of seven 4D contracts in Northern Europe this summer, amounting to approximately 280 acquisition days. Towards the end of the season TGS will acquire multi-client data.

In addition to the ongoing 4D acquisition projects, the Ramform Vanguard mobilized for an offshore wind site characterization contract offshore the UK in late Q1 for a repeat customer. The project is progressing as planned. Following completion of the current project, Ramform Vanguard will undertake another offshore wind site characterization contract, also offshore UK.

As announced in November 2024, TGS’ node-on-a-rope crew was scheduled to mobilize for a contract in Northern Europe early April and the crew successfully completed the project in May according to plan.

Carel Hooijkaas, EVP Operations in TGS, commented, "We are excited about TGS high acquisition activity level in Northern Europe this summer. The successful mobilization of our vessels and the strong contract portfolio underscore our commitment to supporting the energy companies and meeting the evolving needs of the industry. With our Ramform acquisition platform, GeoStreamer technology and our Ultra High Resolution 3D technology for offshore wind site characterization I am confident we will deliver high-quality geoscience data to our clients."

For more information, visit TGS.com or contact:

Bård Stenberg
VP IR & Communication
Mobile: +47 992 45 235
investor@tgs.com

About TGS
TGS provides advanced data and intelligence to companies active in the energy sector. With leading-edge technology and solutions spanning the entire energy value chain, TGS offers a comprehensive range of insights to help clients make better decisions. Our broad range of products and advanced data technologies, coupled with a global, extensive and diverse energy data library, make TGS a trusted partner in supporting the exploration and production of energy resources worldwide. For further information, please visit www.tgs.com (https://www.tgs.com/).

Forward Looking Statement

All statements in this press release other than statements of historical fact are forward-looking statements, which are subject to a number of risks, uncertainties and assumptions that are difficult to predict and are based upon assumptions as to future events that may not prove accurate. These factors include volatile market conditions, investment opportunities in new and existing markets, demand for licensing of data within the energy industry, operational challenges, and reliance on a cyclical industry and principal customers. Actual results may differ materially from those expected or projected in the forward-looking statements. TGS undertakes no responsibility or obligation to update or alter forward-looking statements for any reason