Eurostar Group is a holding company created by SNCF Voyageurs, Caisse de dépôt et placement du Québec, NMBS/SNCB, and Federated Hermes Infrastructure in 2022 with the aim of merging the operations of Thalys and Eurostar high-speed rail services between France, United Kingdom, Belgium, Netherlands, and Germany.

[2] In September 2019, Eurostar and Thalys shareholders introduced a plan to merge the two companies, a project named Green Speed.

The project aims at reducing costs, and at providing a more seamless experience to passengers, with the use of a single ticketing system and loyalty program.

[6] In April 2022, the new holding company, Eurostar Group, was established in Belgium.

It is owned by the previous shareholders of Eurostar and Thalys, with SNCF retaining its majority stake.