Private company

A4 Holding

Logo: a4holding.it3

Group of society connected to the A4 roadway and controlled by Abertis founded in 20111

A4 Holding S.p.A. known as Gruppo A4 Holding (previously as Serenissima Group), is an Italian holding company based in Verona, Veneto region.2 Its revenue was €445 million in 2022.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 20, 2026.

Overview

2011Founded1

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A4 Holding S.p.A. known as Gruppo A4 Holding (previously as Serenissima Group), is an Italian holding company based in Verona, Veneto region. The company owned Autostrada Brescia Verona Vicenza Padova (100%), the operator of Brescia–Padua section of Autostrada A4 and Autostrada A31 (Rovigo via Vicenza to Piovene Rocchette), as well as an equity interests in Autostrada del Brennero, the operator of Autostrada A22 (Modena to Brenner Pass; 4.2327% stake via Serenissima Partecipazioni which A4 Holding owned 99.999% stake) and Autostrade Lombarde, the parent company of the operator of Autostrada A32

Corporate structure

A4 Holding is part of a group headed by Grupo ACS. 84 entities, 15 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Grupo ACS Madrid, Spain
    • Hochtief Essen, Germany
      • Abertis Madrid, Spain
        • A4 Holding Verona
        • Autostrada Brescia Verona Vicenza Padova Verona, Italy
        • Hispasat Subsidiary · Alcobendas, Spain
          • 3 more
        • RED DE CARRETERAS DE OCCIDENTE SAPI DE CV Subsidiary · 70% · Guadalajara, Mexico
          • 2 more
        • ABERTIS FRANCE Subsidiary · Issy-Les-Moulineaux, France
          • 1 more
        • ABERTIS INFRAESTRUCTURAS FINANCE B.V. Subsidiary · Amsterdam, Netherlands
        • Société des Autoroutes du Nord et de l'Est de la France Subsidiary · France
        • Torrespaña Owned · Madrid, Spain
      • Turner Construction New York, New York, United States
      • Flatiron Dragados Subsidiary · Broomfield
      • STONEFORT INSURANCE HOLDINGS S.A. Subsidiary · 100% · Steinfort, Luxembourg
      • Dornan Engineering Holdings Limited Subsidiary · Cork, Ireland
      • DORNAN ENGINEERING LIMITED Subsidiary · Cork, Ireland
      • Flatiron Holding, Inc. Subsidiary · Firestone, Colorado, United States
      • HOCHTIEF Americas GmbH Subsidiary · Essen, Germany
      • HOCHTIEF Asia Pacific GmbH Subsidiary · Essen, Germany
      • HOCHTIEF Europe GmbH Subsidiary · Essen, Germany
      • HOCHTIEF Insurance Broking and Risk Management Solutions GmbH Subsidiary · Essen, Germany
      • HOCHTIEF Projektentwicklung GmbH Subsidiary · Essen, Germany
      • NEXPLORE Technology Holding GmbH & Co. KG Subsidiary · Essen, Germany
      • The Turner Corporation Subsidiary · New York, New York, United States
      • Turner International LLC Subsidiary · New York, New York, United States
      • TURNER INTERNATIONAL PROFESSIONAL SERVICES LIMITED Subsidiary · Dublin, Ireland
      • Yorizon GmbH & Co. KG Subsidiary · Berlin, Germany
      • Radisson Blu Hotel Frankfurt Owned · Frankfurt, Germany
    • Hochtief CZ Prague 5, Czechia
      • Garden Center Invest Subsidiary · 100% · Czechia
    • Dragados Subsidiary · Madrid, Spain
    • ACS DIGITAL & ENERGY SL Subsidiary · Madrid, Spain
      • ACS DIGITAL INFRASTRUCTURE DEVELOPMENT SL Subsidiary · Madrid, Spain
    • ACS Portsmouth Holdings, LLC Subsidiary · Coral Gables, Florida, United States
    • ACS SERVICIOS COMUNICACIONES Y ENERGIA SA Subsidiary · Madrid, Spain
      • ELECTRICIDAD ELEIA, S.L. Subsidiary · Madrid, Spain
      • ENCLAVAMIENTOS Y SEÑALIZACIÓN FERROVIARIA ENYSE, S.A.U. Subsidiary · Alcobendas, Spain
      • KINCARDINE OFFSHORE WINDFARM LIMITED Subsidiary · Madrid, Spain
    • BINDING STATEMENT SA Subsidiary · Madrid, Spain
    • CANADIAN TURNER CONSTRUCTION COMPANY, LTD. Subsidiary · New York, New York, United States
    • CARIATIDE SA Subsidiary · Madrid, Spain
    • CLECE FS, S.A. Subsidiary · Madrid, Spain
    • DRAGADOS SOCIEDAD ANONIMA Subsidiary · Madrid, Spain
      • DRACE GEOCISA SA Subsidiary · Madrid, Spain
      • GEOTECNIA Y CIMIENTOS, S.A Subsidiary · Coslada, Spain
      • HYDRO MANAGEMENT, S.L. Subsidiary · Madrid, Spain
      • MANCHASOL-1 CENTRAL TERMOSOLAR UNO SL Subsidiary · Madrid, Spain
      • VIAS Y CONSTRUCCIONES, S.A. Subsidiary · Madrid, Spain
    • Flatiron Construction Corp. Subsidiary · Firestone, Colorado, United States
    • Flatiron Constructors, Inc. Subsidiary · Firestone, Colorado, United States
    • FLATIRON DRAGADOS USA, INC. Subsidiary · New York, New York, United States
    • FUNDING STATEMENT SA Subsidiary · Madrid, Spain
    • GLENROWAN SOLAR FINANCE PTY LTD Subsidiary · Sydney, Australia
    • HIDROGESTION SA Subsidiary · Rozas de Madrid, Las, Spain
    • HOCHTIEF Construction Management Middle East GmbH Subsidiary · Essen, Germany
    • HOCHTIEF Development Czech Republic s.r.o. Subsidiary · Praha 5, Czechia
    • HOCHTIEF Development Hungary Ingatlanfejlesztő és - hasznosító Kft. "végelszámolás alatt" Subsidiary · Budapest, Hungary
    • HOCHTIEF Engineering GmbH Subsidiary · Essen, Germany
    • HOCHTIEF Infrastructure GmbH Subsidiary · Essen, Germany
    • HOCHTIEF POLSKA SPOLKA AKCYJNA (HOCHTIEF POLSKA SPÓŁKA AKCYJNA) Subsidiary · Warszawa, Poland
    • HOCHTIEF PPP Solutions GmbH Subsidiary · Essen, Germany
    • HOCHTIEF Trade Solutions GmbH Subsidiary · Essen, Germany
    • and 15 more

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

Subsidiaries and ownership

Parent company

Owners

Subsidiaries

From Wikidata.1

Revenue over time

As stated on Wikidata, in the currency reported.

Revenue

  • 2022445.0M EUR1

Timeline

  1. 2011Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

  1. 1
  2. 2
  3. 3
    Company websiteA4 Holding logo