COMSA Corporación companies specialise in the construction and maintenance of railway infrastructure and superstructure (for conventional rail, high-speed rail, tramways, metros and regional rail); engineering, installation and maintenance of overhead contact lines and AC and DC traction substations; engineering, design, development, installation and maintenance of railway safety and communication systems and network management systems and control centres; railway traction; manufacture and supply of ballast; construction of concrete sleepers for main track and sidings, as well as construction for civil engineering and building works; engineering projects and construction management. COMSA Corporación is also present in the field of railway concessions, full maintenance of railway vehicles as well as the renting of high-tech machinery.

Top products: INFRASTRUCTURE: 1. Underground works of the Barcelona Cercanías R2 line as it passes through the town centre of Montcada i Reixac (Spain). 2. Project for the expansion of the Yellow and Green Lines of the Lisbon Metro (Portugal). ELECTRIFICATION: 3. Overhead electric contact line of La Robla - Campomanes split section for the León - Asturias high-speed line (Pajares By-pass) (Spain). MAINTENANCE: 4. Comprehensive maintenance of Line 2 of the Lima and Callao Metro (Perú).

Spain: With over 130 years of history, COMSA Corporación specialises in turnkey railway projects covering construction, facilities, systems, and maintenance for high-speed, trams, metropolitan, and regional railways. Currently, the group is executing the underground works of the R2 line of Barcelona Suburban Railways as it passes through the urban area of Montcada i Reixac, which also includes the construction of the new station for the municipality. Additionally, the group is also responsible for significant projects such as the remodelling and expansion of the lobby of Chamartín station in Madrid and the construction of four additional tracks for high-speed trains, as well as the construction of the AVE station in La Sagrera, Barcelona, and Sector 3 of the Mondragón-Elorrio-Bergara line, part of the Basque Y. Within the framework of the Mediterranean Corridor development, COMSA is implementing standard gauge on the Martorell – Sant Vicenç de Calders section.

Furthermore, its engineering business has developed the construction project for the overhead contact line and associated systems between Plasencia and Bifurcación Peñas Blancas on the Madrid-Extremadura high-speed line, as well as the overhead line equipment of the La Robla – Campomanes stretch of the León – Asturias high-speed line (Pajares By-Pass), which consists of a dual electrification system comprising a 25 kV catenary and a double 20 kV high-voltage line for the supply of safety facilities, independent from the catenary. The group has also completed the comprehensive renovation of the catenary between Maçanet and Caldes de Malavella and the maintenance of the overhead contact line, substations, stations, and associated systems of FGV in Alicante.

Regarding its activities on conventional lines, the company continues to construct the new railway access to Terminal 1 of Barcelona-El Prat Airport, as well as the remodelling of the Pobla Larga-Silla section of Valencia's suburban train network, among other projects.

In the suburban area, COMSA Corporación has continued the construction of the Altza-Galtzaraborda section of the San Sebastián Metro (Gipuzkoa) and is progressing with works on the central section of L9 of the Barcelona Metro. It also undertook the renovation works for the Barceloneta-Verdaguer section of Line 4 of the Barcelona Metro. Additionally, it continues to develop contracts for the conditioning and adaptation of infrastructure, electrical installations, and systems on the metros of Madrid, Barcelona, Valencia, Sevilla, and Málaga.

On the other hand, its concessions area continues to operate the Málaga Metro, which set a record of 13.6 million passengers in 2023, and the Barcelona Tram, of which, also at the end of the year, it carried out the connection along the Diagonal between Glòries and Verdaguer.

Europe: Endorsed by its high specialisation and century-old experience, COMSA Corporación has invested in markets with high opportunities for the development of new infrastructures and the modernisation of existing ones. In this regard, it continues to work on the remodelling and electrification of the railway between the provinces of Vinkovci and Vukovar (Croatia).

In Portugal, COMSA and its subsidiary in the country, FERGRUPO, are tackling the expansion project of the Yellow and Green lines of the Lisbon Metro, which includes the construction of a new 1.9 km stretch between the Rato and Cais de Sodré stops. Additionally, they continue with the renovation works of the Beira Alta line, Pampilhosa - Santa Comba Dão section, and the construction of the Mealhada variant.

America: During the past fiscal year, COMSA Corporación's subsidiary, GMF, strengthened its railway business in Latin America. By the end of 2023, the company was awarded the comprehensive maintenance contract for Line 2 of the Lima and Callao Metro, expanding its contract portfolio to Peru. In Mexico, the group is also working on the rehabilitation of tracks and systems for Line 1 of the Mexico City Metro, as well as the construction of sections 5.2 and 5.3 of the Tren Maya.

In 2023 COMSA Corporación invested more than 8.5 million euros in R&D&i activities. Among the most outstanding projects in which the group is participating is 5GMed, where COMSA is part of the consortium of companies that is carrying out the deployment of 5G technology to guarantee the connectivity of the Spanish and southern French rail network. It is also worth mentioning its presence in the Safe4RAIL-3 programme, which is working on the development of technologies and devices for the next generation of the Train Control and Monitoring System (TCMS).

Finally, as a member of the European Smart Green Rail (eSGR) consortium, the company participates in 4 of the 6 projects funded by the first call published by Europe's Rail Joint Undertaking, an EU initiative that succeeds Shift2Rail and of which it is a founding partner. These projects are R2DATO, IAM4RAIL, Rail4EARTH and FutuRe.

As a company specialised in the development of railway infrastructures, COMSA Corporación is a member of the Board of In-Move by Railgrup and forms part of the Spanish Railway Technology Platform (PTFE), integrated into the European Rail Research Advisory Council (ERRAC).