Wikipedia

Hochtief

Hochtief AG is a global provider of infrastructure technology and construction services, with locations in North America, Australia, and Europe. The Essen based company is primarily active in the fields of high tech, energy transition, and sustainable infrastructure. With the international projects making up 95% of the company's revenue, Hochtief was among the largest international construction firms in 2023.[4][5]

Hochtief AG
Company typePublic Subsidiary
FWB: HOT
MDAX Component
ISINDE0006070006 Edit this on Wikidata
IndustryConstruction
Founded1873; 151 years ago (1873)[1]
HeadquartersEssen, Germany
ProductsConstruction services, project management
RevenueIncrease €27.756 billion (2023)[2]
Increase €523 million (2023)[2]
Decrease €314 million (2023)[2]
Total assetsIncrease €19 billion (2023)[2]
Total equityDecrease €1.266 billion (end 2023)[2]
Number of employees
41,575 (end 2023)[2]
ParentACS Group (75.71%)[3]
Websitehochtief.com
The façade of the greater temple at Abu Simbel, moved to escape the rising Nile. The cliff behind the temple is artificial, and was created to allow the temple to be moved to a higher location.

In Australia, the group is active through its subsidiary Cimic (100% since 2022).[6] Via its wholly owned subsidiary Turner Hochtief is a leader in commercial construction in the United States.[7] Since June 2018, Hochtief has held a 20% stake in Abertis. Abertis directly owns 99.1% of the toll road operator Abertis Infraestructuras.[6]

Since ACS Group first acquired shares in Hochtief in 2005, it has increased its shareholding to 75.71% in 2023.[8]

History

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Founding and early years

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In 1873, brothers Philipp Helfmann (a bricklayer) and Balthasar Helfmann (a locksmith), originally from Kelsterbach, founded the company Gebrüder Helfmann in Frankfurt am Main. While Balthasar was responsible for the completion of construction contracts, Philipp developed the financing side of the business.[9] Their first major contract was for the University of Giessen in 1878.[10] By the 1880s, the company had begun to produce its own construction materials but was still only a regional player. Shortly after the death of Balthasar, Philipp Helfmann transformed the company into a joint-stock corporation for building construction and civil engineering named Aktiengesellschaft für Hoch- und Tiefbauten (Construction and Civil Engineering Corporation) in 1896, just before the German Stock Exchange Act came into force.[11]

A major development was the contract for the spa in Bad Orb in 1899, where the order included not just construction of the buildings, but also provision of infrastructure like roads and gardens, arrangement of finances for the project, and maintenance of some responsibilities for operation after the construction. Also in 1899, another turnkey project, a new grain silo in Genoa, Italy, was both the firm's first international venture and its first project using reinforced concrete. Philipp Helfmann died in the same year, with his son-in-law, Hans Weidmann, taking over as Chief Executive.[9]

After the Helfmann brothers

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Shaft XII at Zollverein colliery was named Schacht "Albert Vögler". The Bauhaus-influenced design combined function with aesthetics.
 
Share of the Hochtief AG, issued 4. July 1927
 
Echelsbach Bridge, completed 1929

The firm grew rapidly, but was not comparable with the major German construction companies of the era. In 1921, it attracted investment from the industrialist Hugo Stinnes (described by Time as the "New Emperor of Germany" for his wealth and influence) and in 1922, the firm moved its base to Essen as part of its integration into the Stinnes group.[12] Stinnes planned to use Hochtief for all his construction projects, while Hochtief saw an opportunity to profit from the Treaty of Versailles, organising the delivery of construction materials to France as part of German reparations for World War I. Stinnes died in 1924,[13] and within a year his industrial empire collapsed. With the help of several banks, the company (now known as Hochtief Aktiengesellschaft für Hoch- und Tiefbauten vorm. Gebrüder Helfmann) avoided insolvency. In the aftermath of the Stinnes collapse, the major utility RWE and electrical equipment producer AEG became major shareholders in Hochtief, and Hans Weidmann stepped down in 1927.[9][14]

A series of major construction projects ensued, including the Echelsbach Bridge (then Germany's largest single span reinforced concrete bridge),[15] the Schluchsee dam and work on the Zollverein colliery.[16]

From Nazi Germany to Reconstruction

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A reconstruction of the layout of the Führerbunker in Berlin, built by Hochtief in 1943. Hitler committed suicide here during the Battle of Berlin in 1945.

From 1933 onwards, the structures of the Third Reich influenced Hochtief’s business activities.[17] Jewish members of the Supervisory Board were expelled under the Nuremberg Laws in 1935. In 1937, CEO Eugen Vögler joined the Nazi Party (NSDAP) and served as leader of the Construction Industry Group as well as an honorary squad leader of the Hitler Youth.[18] The construction business flourished under the four year plan, with its vast public works programme, including the Autobahn network, and the industrial build-up in preparation for war, for example the construction of a new truck factory for Opel in Brandenberg. Hochtief also worked on a new centre for Nazi rallies in Nuremberg. In 1936, it moved its Essen headquarters from the Pferdemarkt to its current location on Rellinghauser Straße. As war became imminent, the company began work on the Westwall defensive network.[19] During World War II, it worked on the Atlantic Wall defences, and a range of infrastructure projects across German-dominated Europe. Hochtief also constructed buildings for Hitler himself, notably his Bavarian Alpine retreat, the Berghof, his Wolf's Lair headquarters in Rastenburg, and the Führerbunker in Berlin, where Hitler ultimately committed suicide.[9][20]

After 1939, the firm began to use forced labour extensively on its projects, as did many other German industrial concerns at the time. Hochtief's slave workers suffered from malnutrition, beating and constant abuse.[21][22]

Reconstruction and international expansion

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Historic entrance to the former company headquarters
 
Headquarters of the Group in Essen

1945–1966

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After the collapse in 1945, Hochtief lost both its international business and its branches in East Germany.[23] Under the leadership of the new CEO, Artur Konrad, operations continued.[24]

 
The old and new positions of the Abu Simbel temples

One of the first major contracts was for a university hospital in Bonn, between 1946 and 1949. The introduction of the Deutsche Mark in 1948 and the beginning of the Wirtschaftswunder brought more new work.[25]

Josef Müller took over as CEO in 1950. A decision was made to undertake more international projects, following a period of essentially domestic work after World War II. This included a series of power infrastructure works in Turkey and bridge and smelting works construction in Egypt during the early 1950s. Many projects from this period were undertaken outside of the First World, often funded from development aid budgets.[26]

The company gained international recognition for the relocation of the Abu Simbel rock temple (from November 1963 to September 1968, planned by Walter Jurecka, former head of the international division) and the Mandulis Temple of Kalabsha (1961 to 1963). These UNESCO World Heritage sites had to be relocated due to the construction of the Aswan High Dam.[27][28]

 
The radical Messe Torhaus in Frankfurt, with its "Guillotine"

1967–1989

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From 1967 onwards, the company’s focus shifted away from purely construction services towards turnkey construction and related services, exemplified by the Hilton Hotel in Athens.[29]

By the mid-1970s, the international business accounted for only a small portion of the company’s activities. Most work was domestic, driven by Germany's strong economic growth, with a particular strength in power plant construction. This included the construction of the Federal Republic of Germany's first nuclear power plant, Kahl Nuclear Power Plant, near Dettingen am Main.[30][31] The construction contract had been awarded by AEG, which had been commissioned by the utility company RWE to build the plant. The plant began to feed its electricity to the grid in June 1961.[32][33] By contrast, the first East German nuclear plant, at Rheinsberg, was connected to the grid in 1966.[34] During the 1960s and 1970s, the company also executed significant transport infrastructure projects. Notable examples include the Raúl Uranga Subfluvial Tunnel in Argentina, the Elbe Tunnel in Hamburg, and the Bosphorus Bridge in Istanbul.[35]

After the 1973 oil crisis, the company benefited from the unexpected wealth of oil-exporting countries. By 1980, foreign work accounted for more than 50% of Hochtief's business. A major factor was the contract for the turnkey construction of King Abdulaziz International Airport (completed in 1981), the largest airport in Saudi Arabia, located in Jeddah, and the most valuable contract Hochtief had ever been involved with.[36] The aesthetics of the architecture of the airport is highly rated, and it has several unusual features, including Terminal Three, used only during the Hajj, reserved for pilgrims travelling to Mecca. It has a tent-shaped fibreglass roof, contains a mosque, can accommodate 80,000 travellers at once, and is believed to be the largest terminal in the world.[37]

 
When the Messeturm in Frankfurt was completed in 1991, it was Europe's tallest building.

1990–2007

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After German reunification, the company benefited from the construction boom, although by 1993, slowing economic growth led to increased competitive pressure. Under the leadership of Hans-Peter Keitel initially,[38] and from 2007 Herbert Lütkestratkötter, the company underwent a restructuring.[39] While construction remained the core business, Hochtief also began offering additional services as a construction provider, including the planning, financing, and operation of buildings. Acquisitions were made to support these new business areas.[40] To further this, Hochtief founded new companies and acquired Australia's Leighton Holdings and the US-based Turner Construction.[41]

In 2004, Hochtief transitioned from a subsidiary to a publicly traded company: the sale of the majority shareholder RWE’s shares gave Hochtief a new international shareholder structure.[42] By 2005, around 80% of the company was in free float.[43] Through the acquisition of service companies Siemens Gebäudemanagement[44] and Lufthansa Gebäudemanagement,[45] Hochtief Facility Management, a subsidiary, expanded from 800 to approximately 4,500 employees in 2004. In 2007, Hochtief acquired Flatiron, a provider of infrastructure projects in the United States.[46] Hochtief is also represented in the Gulf region through the Habtoor Leighton Group, a Leighton subsidiary.[47]

Loss of independence

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In 2005, August von Finck, through his Custodia Holding, acquired a stake in the company, which was increased to 25.08% in 2006.[48][49] In March 2007, the Spanish construction group Actividades de Construcción y Servicios (ACS) purchased Custodia’s shares for €72 per share, with the transaction amounting to over €1.26 billion.[50] Subsequently, ACS acquired more shares, holding 29.9% by September 2010.[51] On 16 September 2010, ACS announced a public takeover bid for the remaining shares, offering an exchange of eight ACS shares for five Hochtief shares. On 29 November, BaFin approved ACS’s takeover of Hochtief. In December, Qatar Holding from the Emirate of Qatar subscribed to a reserved capital increase, acquiring nearly 9.1% of the shares. After improving the offer to nine ACS shares for five Hochtief shares, ACS announced in January 2011 that it held over 30% of Hochtief’s shares following the conclusion of the takeover bid.[52][53] By June 2011, ACS held slightly over 50% of Hochtief’s shares,[54] as shares held by Hochtief itself were voting shares attributed to ACS.

Restructuring and reorganisation

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In May 2013, Hochtief sold its airports division to Canada's Public Sector Pension Investment Board for €1.1 billion.[55] At the same time, Hochtief began restructuring its loss-making European activities in 2013: The Group spun off the construction business, which had previously been bundled into one unit, into four largely autonomous companies and cut up to 1,000 jobs, primarily in Germany.[56]

In February 2014, the 50% stake in the real estate company Aurelis Real Estate, a former subsidiary of Deutsche Bahn, was sold to an investor consortium led by the private equity firm Grove.[57] Further sales of smaller business units followed. In May 2015, Hochtief’s offshore business was sold to GeoSea, a subsidiary of the DEME Group.[58] However, Hochtief strengthened its activities in the Asia-Pacific region, increasing its stake in the listed Australian subsidiary Leighton Holdings Limited from approximately 58% to 69.62% in 2014.[59]

As part of the reorganisation, the company was renamed from Leighton Holdings to Cimic Group in April 2015.[60]

Developments from the 2020s onwards

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In 2022, Juan Santamaría Cases assumed his position as CEO of the company, succeeding Marcelino Fernández Verdes.[61] In 2023, Hochtief, together with EWE, was awarded funding under the German government's Deutschlandnetz initiative to establish and operate charging points for electric vehicles.[62]

Organisation

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Hochtief is an Aktiengesellschaft. Its shares are traded on all German stock exchanges, including the Frankfurt Stock Exchange and Börse München, using the Xetra system. In the 2023 financial year, Hochtief generated revenue of €27.8 billion, with the majority of earnings coming from Hochtief Americas. During the same financial year, 41,575 employees worked for the group.

Shareholder structure

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Shareholders as of September 2024:

  • Grupo ACS – 75.71%
  • Floating share – 21.07%
  • Treasury shares – 3.21%

Company structure

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The Hochtief Group operates three divisions with subsidiaries and additionally holds a 20% stake in Abertis HoldCo, S.A.:

Hochtief
Turner Construction Cimic Group Engineering and Construction Abertis

Turner is an American construction management company.[63] It is primarily involved in the delivery of healthcare and education facilities, airports, sports venues, and office buildings.[64] Additionally, Turner is increasingly active in the construction of technical facilities, such as factories for electric vehicles and battery recycling, as well as data centres, including those for the internet company Meta.[65][66][67]

Cimic operates in the Asia-Pacific region, providing construction services for sectors such as education, healthcare, power and energy, transportation, tunnelling, and water.[68][69] Cimic is also active in natural resources, holding stakes in service providers Thiess and Sedgman.[70]

Engineering and Construction encompasses Hochtief's construction activities and PPP business in Europe, along with the civil engineering company Flatiron in North America. In Europe, Hochtief operates in Germany, Poland, the Czech Republic, Austria, the UK, Scandinavia, and the Netherlands.[71]

Hochtief holds a stake in Abertis, a toll road operator with approximately 8,000 kilometres of toll roads in Europe and South America. Abertis operates mainly in France, Spain, Brazil, Chile, the United States, Mexico, and Puerto Rico.[72]

Subsidiaries include Flatiron, CPB Contractors, Leighton Asia (active in Hong Kong and other Southeast Asian countries),[73] and Hochtief Infrastructure.[74]

Products and services

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The company is mainly active in construction and civil engineering (buildings, bridges, tunnels, etc.). In addition to executing construction projects, Hochtief is also involved in planning and, in some cases, acts as a co-investor. Furthermore, Hochtief is active in the construction and operation of environmental technology facilities, as well as the expansion of digital infrastructure.[66][75][67]

The corporate group also provides services such as organising and consulting on real estate and infrastructure facilities.[5][6]

Urban and social infrastructure

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Hochtief develops and constructs neighbourhoods and districts that include residential properties, as well as public and commercial facilities.[5][76]

Energy infrastructure and digital infrastructure

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Hochtief delivers construction and infrastructure services for energy systems, from generation to utilization, and supports digital infrastructure projects like data centers and telecom networks.[63][66][75]

Hochtief is active in the energy infrastructure sector through subsidiaries such as Flatiron in the USA and Canada, CPB Contractors in Australia, Leighton Asia in Hong Kong and Southeast Asia, as well as Hochtief Infrastructure in Germany.[6]

Transport infrastructure

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In the field of transport infrastructure, the company constructs bridges, railways, stations, airports, and ports, as well as roads, tunnels, and motorways both domestically and internationally, often within the framework of concession models such as public-private partnerships.[6]

Hochtief holds a 20% stake in the internationally operating toll road operator Abertis, which owns approximately 8,000 kilometres of toll roads across several countries.[72]

Mining operations

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Hochtief is involved in the mining business through Cimic and holds a stake in Thiess, a contract miner. In October 2020, Cimic sold 50% of its stake in its mining subsidiary Thiess to the Elliott Fund Management;[77] in April 2024, Cimic increased its shareholding back to 60%.[78]

Timeline of notable construction projects

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The Commerzbank Tower surpassed the Messeturm
 
Elbphilharmonie
 
Franfurt Airport

Projects Hochtief has been involved in include the Elbphilharmonie in Hamburg, the Gotthard Base Tunnel in Switzerland and the project planning of the Burj Khalifa in Dubai. Hochtief has also worked on various airports, such as those in Frankfurt, Athens, and Warsaw, as well as several expansions of the German motorways. International bridge construction projects include the Øresund Bridge and the Bosphorus Bridge.[79][80]

The company is also working on the Chacao Channel bridge due to be completed in 2025.[104]

Sustainability

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In 2022, Hochtief published its Sustainability Plan 2025, aiming for the company’s operations to become climate-neutral by 2045.[105] Additionally, the company is listed in the Dow Jones Sustainability Index by S&P Global.[106]

Bibliography

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  • Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. ISBN 978-3-492-04270-3.

Notes and references

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  1. ^ "Hochtief Konzern Geschichte". Hochtief.
  2. ^ a b c d e f "Hochtief Group Report 2023". Hochtief. Retrieved 30 September 2023.
  3. ^ "ACS Actividades de Construccion y Servicios company: Shareholders, managers and business summary – Bolsa de Madrid: ACS - 4-Traders". 4-traders.com.
  4. ^ "ENR's 2023 Top 250 International Contractors". Engineering News-Record. Retrieved 30 September 2024.
  5. ^ a b c "Hochtief AG, Essen". North Data (in German). Retrieved 30 September 2024.
  6. ^ a b c d e "Konzernabschluss zum Geschäftsjahr vom 1.1.2023 bis zum 31.12.2023" [Annual Report 2023]. Unternehmensregister. 18 March 2024.
  7. ^ "ENR 2023 Top 400 Contractors 1–100". Engineering News-Record. Retrieved 30 September 2024.
  8. ^ "Group Report 2023" (PDF). Handelsblatt. 22 February 2024. p. 61.
  9. ^ a b c d "History". Hochtief. Retrieved 26 September 2024.
  10. ^ a b "University of Giessen". Hochtief. Retrieved 26 September 2024.
  11. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. pp. 45f. ISBN 978-3-492-04270-3.
  12. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. p. 92. ISBN 978-3-492-04270-3.
  13. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. p. 81. ISBN 978-3-492-04270-3.
  14. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. p. 113. ISBN 978-3-492-04270-3.
  15. ^ "Echelsbach Bridge". Hochtief. Retrieved 26 September 2024.
  16. ^ "Zollverein Colliery in Essen". Hochtief. Retrieved 26 September 2024.
  17. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. p. 123. ISBN 978-3-492-04270-3.
  18. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. pp. 129–143. ISBN 978-3-492-04270-3.
  19. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. pp. 157–169. ISBN 978-3-492-04270-3.
  20. ^ "Vorbunker und Führerbunker". Berliner Unterwelten e.V (in German). 18 August 2013. Archived from the original on 18 August 2013. Retrieved 26 September 2024.
  21. ^ Belle Millo, ed. (2010). Voices of Winnipeg Holocaust Survivors. Belle Millo. p. 166. ISBN 978-0-9691256-9-3.
  22. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. pp. 181–195. ISBN 978-3-492-04270-3.
  23. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. pp. 205–207. ISBN 978-3-492-04270-3.
  24. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. p. 218. ISBN 978-3-492-04270-3.
  25. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. pp. 259–268. ISBN 978-3-492-04270-3.
  26. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. p. 260. ISBN 978-3-492-04270-3.
  27. ^ "Es ist spät für Abu Simbel". Die Zeit (in German). 6 December 1963. ISSN 0044-2070. Retrieved 30 September 2024.
  28. ^ Spencer, Terence (2 December 1966). The Race to Save Abu Simbel Is Won. Life. pp. 33–36.
  29. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. pp. 281f. ISBN 978-3-492-04270-3.
  30. ^ a b c From the master-builder to the construction corporation (1966–1989), Page 2/3, Hochtief history website. Retrieved 16 February 2006
  31. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. p. 286. ISBN 978-3-492-04270-3.
  32. ^ History of Nuclear Power Archived 20 November 2005 at the Wayback Machine, German Atomic Energy Forum Archived 16 January 2007 at the Wayback Machine. Retrieved 16 February 2006
  33. ^ "Anfang und Ende des ersten deutschen Meilers". Focus Online (in German). 14 March 2016. Retrieved 30 September 2024.
  34. ^ Nuclear Power in Germany, Nuclear Issues Briefing Paper 46, Jan 2009 Archived 20 February 2009 at the Wayback Machine, World Nuclear Association[1] . Retrieved 12 January 2009
  35. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. p. 292. ISBN 978-3-492-04270-3.
  36. ^ "Airport in Jeddah". Hochtief. Retrieved 26 September 2024.
  37. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. pp. 286–292. ISBN 978-3-492-04270-3.
  38. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. p. 303. ISBN 978-3-492-04270-3.
  39. ^ Heise, Stephanie; Heise, Harald (11 April 2011). "Herbert Lütkestratkötter: Der tragische Abgang des Hochtief-Chefs". Wirtschaftswoche (in German). Retrieved 30 September 2024.
  40. ^ Pohl, Manfred; Siekmann, Birgit (2000). Hochtief und seine Geschichte: von den Brüdern Helfmann bis ins 21. Jahrhundert. München Zürich: Piper. p. 310. ISBN 978-3-492-04270-3.
  41. ^ Sigrist, Damian (18 August 1999). "Hochtief schliesst eine Lücke". Finanz und Wirtschaft (in German). Retrieved 30 September 2024.
  42. ^ "Hochtief mit neuem Chef und alter Strategie". Neue Zürcher Zeitung (in Swiss High German). 23 November 2006. ISSN 0376-6829. Retrieved 30 September 2024.
  43. ^ "Übernahmegerüchte treiben Aktie des Baukonzerns Hochtief". Die Welt (in German). 10 August 2005. Retrieved 30 September 2024.
  44. ^ "Baukonzern Hochtief kauft das Gebäudemanagement von Siemens". Die Welt (in German). 16 December 2003. Retrieved 30 September 2024.
  45. ^ "Gebäudemanagement: Lufthansa verkauft Geschäftsfeld". Frankfurter Allgemeine Zeitung (in German). 5 May 2004. Retrieved 30 September 2024.
  46. ^ Wnuck, Corinna (25 September 2007). "Hochtief übernimmt Flatiron Construction in den USA". Finance (in German). Retrieved 30 September 2024.
  47. ^ Maurer, Peter (11 December 2013). "Hochtief-Tochter baut Wohnhochhäuser in Dubai". Immobilien Zeitung (in German). Retrieved 30 September 2024.
  48. ^ Damm, Christoph (27 November 2018). "So verworren ist das Firmenimperium des geheimnisvollen Milliardärs, der die AfD unterstützt haben soll". Business Insider (in German). Retrieved 30 September 2024.
  49. ^ "Hochtief – Custodia Holding erhöht Anteil auf 25,08 %". Finanznachrichten (in German). 9 February 2006. Retrieved 30 September 2024.
  50. ^ "ACS wird Mehrheitsaktionär von Hochtief". Neue Zürcher Zeitung (in Swiss High German). 22 March 2007. ISSN 0376-6829. Retrieved 30 September 2024.
  51. ^ Maier, Jutta (3 February 2019). "Machtwechsel bei Hochtief". Frankfurter Rundschau (in German). Retrieved 30 September 2024.
  52. ^ "ACS bei Hochtief (fast) am Ziel". n-tv (in German). 3 February 2011. Retrieved 30 September 2024.
  53. ^ "Übernahme des Baukonzerns Hochtief: ACS nimmt Hürde von 30 Prozent". Frankfurter Allgemeine Zeitung (in German). 4 January 2011. Retrieved 30 September 2024.
  54. ^ Wiggins, Jenny (27 May 2011). "Leighton hopes ASC stays aloof". Australian Financial Review. Retrieved 30 September 2024.
  55. ^ Ludwig Burger (7 May 2013). "Hochtief sells airport unit to Canada's PSP Investments for $1.4 billion". Reuters.
  56. ^ Gassmann, Michael (28 February 2014). "Hochtief baut immer noch um". Die Welt (in German). Retrieved 30 September 2024.
  57. ^ "Hochtief trennt sich von Aurelis". Legal Tribune Online (in German). 7 February 2014. Retrieved 30 September 2024.
  58. ^ "Hochtief verkauft Offshore-Sparte an GeoSea". Legal Tribune Online (in German). 26 May 2015. Retrieved 30 September 2024.
  59. ^ "Hochtief bid for Leighton falls short". The Australian. 12 May 2014.
  60. ^ Wiggins, Jenny (20 March 2015). "Leighton to change name to CIMIC in wake of corruption allegations". Australian Financial Review. Retrieved 30 September 2024.
  61. ^ Becker, Annette (19 July 2022). "Hochtief-Chef Fernández räumt das Feld". Börsen-Zeitung (in German). Retrieved 30 September 2024.
  62. ^ "Elektrofahrzeuge: Zehn Unternehmen dürfen Deutschlandnetz stricken". Energie & Management (in German). 7 September 2023. Retrieved 30 September 2024.
  63. ^ a b Meinke, Ulf (23 February 2024). "Neue Hochtief-Zentrale in Essen". Westfälische Rundschau (in German). p. 8.
  64. ^ "Ein Stadion für New York". Süddeutsche Zeitung (in German). 18 April 2023. p. 14.
  65. ^ "Hochtief-Tochter errichtet US-Rechenzentrum für Meta". Handelsblatt (in German). 26 January 2024. Retrieved 26 September 2024.
  66. ^ a b c Jansen, Jonas; Theile, Gustav (23 May 2023). "Wettlauf im Batteriewerksbau". Frankfurter Allgemeine Zeitung (in German). p. 20.
  67. ^ a b "Wie sich ein Rechenzentrum rechnet". Rheinische Post (in German). 14 April 2023. p. 26.
  68. ^ Meinke, Ulf (22 February 2024). "Neue Hochtief-Zentrale in Essen: Pläne nicht aufgegeben". Westdeutsche Allgemeine Zeitung (in German). Retrieved 26 September 2024.
  69. ^ "Cimic mit Großauftrag". Frankfurter Allgemeine Zeitung (in German). 5 December 2023. p. 19.
  70. ^ Jansen, Jonas; Hein, Christoph (13 July 2020). "Schwarzes Gold lockt Hochtief". Frankfurter Allgemeine Zeitung (in German). p. 18.
  71. ^ "Locations and regional contact persons". Hochtief. Retrieved 26 September 2024.
  72. ^ a b Müller, Benedikt (30 October 2018). "Mautstraßen statt Pullover". Süddeutsche Zeitung (in German). p. 20.
  73. ^ "Auf vier Prozent bauen". Wirtschaftswoche (in German). 7 June 2024. p. 78.
  74. ^ Feldhaus, Friedhelm (21 November 2023). "Hochtief realisiert ÖPP Schulzentrum Süd im niedersächsischen Lehrte". Immobilien Zeitung (in German). Retrieved 26 September 2024.
  75. ^ a b "ACS-Tochter Hochtief steigert Gewinn und Umsatz". Süddeutsche Zeitung (in German). 22 February 2024. Retrieved 30 September 2024.
  76. ^ "Activities". Hochtief. Retrieved 30 September 2024.
  77. ^ "Hochtief subsidiary CIMIC enters sale agreement with Elliott for 50% of Thiess". Hochtief. 19 October 2020. Retrieved 30 September 2024.
  78. ^ "Hochtief-Aktie unter Druck". Finanzen (in German). 24 April 2024. Retrieved 30 September 2024.
  79. ^ "Viele Aufträge für Hochtief". Frankfurter Allgemeine Zeitung (in German). 24 February 2023.
  80. ^ Bühren, Katja (28 September 2012). "Hochtief baut Passagierterminal am Warschauer Flughafen um". Immobilien Zeitung (in German). Retrieved 30 September 2024.
  81. ^ Zollverein coal mine in Essen, 1929-1931, Hochtief history website. Retrieved 16 February 2006; further information Archived 27 December 2005 at the Wayback Machine on http://www.worldheritagesite.org/ accessed 16 February 2006
  82. ^ The Echelsbach Bridge, Hochtief history website. Retrieved 16 February 2006; Echelsbach Bridge at Structurae. Retrieved 16 February 2006
  83. ^ Under the influence of the Stinnes Group, (1921-1933), Page 5/6, Hochtief history website. Retrieved 16 February 2006
  84. ^ Albert Canal in Belgium, 1930–1934, Hochtief history website. Retrieved 16 February 2006
  85. ^ Politicization of the construction industry (1933–1945), Page 3/4, Hochtief history website. Retrieved 16 February 2006
  86. ^ a b Reconstruction (1945–1966), Page 3/3, Hochtief history website. Retrieved 16 February 2006
  87. ^ Paraná Tunnel in Argentina, 1961–1962, Hochtief history website. Retrieved 6 February 2006
  88. ^ The rescue of Abu Simbel, 1963–1968, Hochtief website. Retrieved 16 February 2006
  89. ^ Elbe tunnel in Hamburg, 1969–1975 and 1997–2003, Hochtief history website. Retrieved 16 February 2006
  90. ^ Bosphorus Bridge in Turkey, 1970–1974, Hochtief history website. Retrieved 16 February 2006
  91. ^ a b From the master-builder to the construction corporation (1966–1989), Page 3/3, Hochtief history website. Retrieved 16 February 2006
  92. ^ Exhibition center tower in Frankfurt am Main, 1988–1991, Hochtief history website. Retrieved 16 February 2005; Messe Tower at Structurae
  93. ^ Warsaw International Airport, 1990–1992, Hochtief history website. Retrieved 16 February 2006
  94. ^ Commerzbank in Frankfurt am Main, 1994–1996, Hochtief website. Retrieved 16 February 2006; Commerzbank Tower at Structurae
  95. ^ System leadership and the public-private partnership from 1990 onwards, Page 2/5, Hochtief history website. Retrieved 16 February 2006
  96. ^ The Kadinsky-Klee House, Hochtief website. Retrieved 16 February 2005; Restoration, Hochtief website. Retrieved 16 February 2006; Bauhaus and its sites Archived 30 August 2006 at the Wayback Machine, http://www.worldheritagesite.org/. Retrieved 16 February 2006
  97. ^ Website of Dr. Klaus Dierks [2], first Deputy Minister for Works, Transport and Communication in independent Namibia, involved in the planning and negotiations for the bridge. Retrieved 15 February 2005.
  98. ^ The Opera Krakowska: "About us" Access date: 9 July 2009
  99. ^ "Футбольный клуб "Днепр"". Archived from the original on 5 October 2008. Retrieved 13 October 2008.
  100. ^ "Scotland's Queensferry Crossing welcomes first traffic". The Engineer. 30 August 2017. Retrieved 30 September 2024.
  101. ^ Webb, Alex (30 June 2015). "Hochtief-Led Group Seals $1.5 Billion Riyadh Airport Contract". bloomberg.com. Retrieved 7 April 2016.
  102. ^ Hillemacher, Monika (17 June 2021). "Im Ausland bauen deutsche Firmen Brücken und grüne Hochhäuser". Immobilien Zeitung (in German). Retrieved 30 September 2024.
  103. ^ "Hochtief-Tochter Cimic baut Metrostation in Sydney". Süddeutsche Zeitung (in German). 17 September 2019. Retrieved 30 September 2024.
  104. ^ "Chacao Channel bridge". Conference: 6th International Conference on Case Histories in Geotechnical EngineeringAt: Arlington, VA. 1 August 2008. Retrieved 3 May 2021.
  105. ^ "Hochtief ist weltweiter Branchenführer für Nachhaltigkeit". Deal Magazin (in German). 12 December 2022. Retrieved 26 September 2024.
  106. ^ Göbel, Vanessa (18 December 2023). "Diese Unternehmen sind führend im Dow Jones Sustainability Index". Markenartikel Magazin (in German). Retrieved 26 September 2024.
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