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Mostostal Warszawa

One of Poland's largest construction companies, listed on the Warsaw Stock Exchange and part of the Acciona group.

Last updated September 26, 2026

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Overview

Mostostal Warszawa S.A. is a major Polish construction company headquartered in Warsaw. It operates as a general contractor across all key sectors of the construction market, both in Poland and abroad. The company is part of the Mostostal Warszawa Capital Group, which includes subsidiaries such as AMK Kraków S.A. (design and engineering), Mostostal Kielce S.A. (steel structures), and Mostostal Płock S.A. (specialist construction). The group employs approximately 1,535 people and has been active in the market for 81 years (as of the official website's current statement). Mostostal Warszawa was formed in 1951 as part of the state-run Mostostal association. It began undertaking projects outside Poland in 1973. In 1991 it was privatised, and in 1993 it was listed on the Warsaw Stock Exchange. In 1994 the Mostostal Warszawa Capital Group was established. In 1999 the Spanish construction group Acciona acquired a majority stake in the company, and it remains the majority shareholder. The company's core business areas include general construction (residential, office, public buildings, production halls, warehouses), industrial construction (large-volume industrial facilities, technological installations, steel structures for heavy industry), infrastructure and road construction (bridges, viaducts, flyovers, multi-level intersections, underground structures including tunnels and metro facilities), environmental construction (execution and supply of equipment for environmental protection facilities, including energy-related objects), and power engineering construction (turnkey construction of fossil-fuel-based energy facilities). The group also has extensive equipment and technical facilities, including its own production workshops equipped with advanced technological devices. Mostostal Warszawa is currently involved in major projects such as the construction of Terminal T6, where piling works for the main reinforced concrete structure have begun. The company continues to be a significant player in the Polish construction sector.

History

Mostostal Warszawa was established in 1951 as part of the state-owned Mostostal association, with its seat in Warsaw. The company initially focused on general construction within Poland. In 1973, it began undertaking construction projects outside Poland, marking its entry into international markets. Following the political and economic transformations in Poland, the company was privatised in 1991. In 1993, it was listed on the Warsaw Stock Exchange, becoming a publicly traded company. In 1994, the Mostostal Warszawa Capital Group was formed, consolidating several subsidiaries under a holding structure. In 1999, the Spanish construction and infrastructure group Acciona acquired a majority stake in the company, integrating it into a larger international group. Since then, Mostostal Warszawa has continued to operate as a major general contractor in Poland and abroad, expanding its portfolio to include industrial, infrastructure, environmental, and power engineering construction. The group's subsidiaries include AMK Kraków S.A. (design and engineering), Mostostal Kielce S.A. (steel structures), and Mostostal Płock S.A. (specialist construction). As of 2020, the shareholder structure included Acciona as the majority shareholder. The company remains active, employing around 1,535 people and participating in significant projects such as the construction of Terminal T6.

  • 1999

    Spanish group Acciona acquired a majority stake.

  • 1994

    Mostostal Warszawa Capital Group formed.

  • 1993

    Listed on the Warsaw Stock Exchange.

  • 1991

    Company privatised.

  • 1973

    Began construction projects outside Poland.

  • 1951

    Company formed as part of the Mostostal association, based in Warsaw.

Products and positioning

One of the largest construction companies in Poland, operating as a general contractor in all key sectors of the construction market.

  • General construction

    Residential buildings and estates, office and public utility buildings, production halls and warehouse facilities.

  • Industrial construction

    Large-volume industrial facilities: production and warehouse halls, technological installations and steel structures for heavy industry.

  • Infrastructure and road construction

    Construction of bridges, viaducts, flyovers, multi-level intersections, and underground structures including tunnels and metro facilities.

  • Environmental construction

    Execution and supply of equipment for environmental protection facilities, including energy-related objects.

  • Power engineering construction

    Turnkey construction of energy facilities based on fossil fuels.

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