Allseas Group S.A.

Switzerlandallseas.com

Swiss offshore contractor specializing in subsea pipeline installation.

Projects Allseas is involved in

chemXplore tracks 2 projects involving Allseas, of which one is active.

Allseas's role on them: EPCI.

1 Under Construction

1 new construction.

Expected to start operating
2026
none
2027
1 project
2028
none
2029
none
2030
none
2031
none
What moved recently
  • 22 August 2026 Equinor Troll Phase 3 Stage 2 Gas Expansion · Operational / Completed · Norway

Contractors, licensors, and offtakers are recorded on this project For subscribers

Targeting: Carbon dioxide (1)

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Latest news on Allseas

25 August 2026
Equinor: Troll Phase 3 Stage 2 boosts gas supply to Troll A

Stage 2 began production on 22 August, accelerating 55 billion scm from Troll West, coming online early and several hundred million NOK below the original cost estimate.

16 July 2026
Gasunie positions the Netherlands as Europe’s CO₂ hub

Five connected CCS projects (Porthos, Aramis, CO₂next, DRC, DSC) will capture, transport and store CO₂ under the North Sea and link industry across the Netherlands, Belgium and Germany.

17 November 2025
Aramis Initiates Offshore Pipeline Tender

Tender opened for 200 km CO2 pipeline, linking Maasvlakte to offshore storage, aiding decarbonization. Further tenders for installation and design to follow. Operational by 2030.

14 August 2025
Porthos CO2 Pipeline Installed Offshore

A 20-km CO2 pipeline is laid and entrenched under the North Sea, connecting Rotterdam's port to storage reservoirs over 3 km below the seabed.

17 December 2024
Aramis: D-HUBN CO2 Distribution Platform

D-HUBN is an offshore platform for CO2 distribution, using hybrid energy. It coordinates CO2 transport to storage sites, focusing on safety and efficient operations.

19 December 2023
Air Liquide to Build CO₂ Capture Unit in Rotterdam

The new unit will use Cryocap™ technology to capture CO₂ from a hydrogen plant, transport it via Porthos, and store it in North Sea gas fields, reducing emissions by 2.5 million tons annually.

18 November 2023
Porthos Launches First CO2 Storage Project in Rotterdam

Porthos will invest €1.3 billion in a CO2 transport and storage system in Rotterdam, operational by 2026. It will store 2.5 Mton CO2 annually for 15 years, aiding Dutch climate goals.

Where its projects are

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