Boskalis
Boskalis is a Dutch maritime infrastructure company specializing in dredging, offshore energy, heavy marine transport and related services.
Last updated August 31, 2026
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Overview
Boskalis is a Netherlands-based maritime infrastructure and services group whose roots are in dredging. The company develops, constructs and maintains infrastructure connected with ports, waterways, coastlines, offshore energy and land reclamation. Its activities include capital and maintenance dredging, marine transport, heavy lifting, salvage, offshore installation, cable laying, harbor towage and specialized support for energy and civil-engineering projects. Through its Boskalis and associated specialist businesses, the group combines a large dredging fleet with heavy-transport vessels, offshore construction assets, tugs and other marine equipment. The business began in 1910 as Johannes Kraaijeveld en van Noordenne, founded by Johannes Kraaijeveld and Eliza van Noordenne. During the 1930s it became associated with the Bos and Kalis names and adopted the name NV Baggermaatschappij Bos & Kalis. Its early growth was tied to Dutch water-management and land-reclamation work, including participation in the Zuiderzee project. An international orientation developed through work in the United Kingdom and West Africa, including a relationship with Westminster Dredging Company established in 1933. Boskalis became a public company in 1970 and received the royal designation in 1978. After difficult economic and political conditions in the 1980s, it concentrated on its core dredging activities. In the 1990s, the company expanded internationally through acquisitions and major infrastructure projects. It participated in the reclamation and development of land for Hong Kong’s Chek Lap Kok airport, supported multi-year development work in Singapore, and contributed to port construction at Ras Laffan in Qatar. From the 2000s onward, Boskalis broadened its maritime capabilities. It acquired or integrated businesses involved in marine transport, heavy lift and civil engineering, including Dockwise and MNO Vervat, while also acquiring Smit International after a prolonged approach. The company later sold its interest in Archirodon and divested several harbor-towage interests as part of a sharper focus on selected maritime markets. Its project portfolio has included port deepening in Australia, port development in Abu Dhabi, the Suez Canal expansion and major reclamation schemes in the Philippines. It has also supported offshore wind projects, particularly through installation and subsea cable-laying work; offshore wind became a major contributor to its offshore-energy revenue. Boskalis became privately controlled after HAL Investments completed a 2022 offer that obtained more than 95 percent of the shares. The company was subsequently delisted from Euronext Amsterdam. It continues to operate internationally in dredging, marine infrastructure, offshore energy and heavy marine services. The group’s work is typically project-based and equipment-intensive, requiring specialized vessels, engineering capability, marine logistics and the ability to execute large, complex contracts in environmentally and operationally demanding locations.
History
Boskalis traces its origins to 1910, when Johannes Kraaijeveld and Eliza van Noordenne established Johannes Kraaijeveld en van Noordenne in the Netherlands. During the 1930s, the business was taken over by figures associated with the Bos and Kalis families and renamed NV Baggermaatschappij Bos & Kalis. The company participated in Dutch water-management works, notably the Zuiderzee project, and began building an international presence. A 1931 contract for dredging Bromborough Dock in England and a 1933 partnership with Westminster Dredging Company helped open commercial opportunities in the United Kingdom and West Africa. Boskalis became a public company in 1970 and was granted the designation Royal in 1978. During the economically difficult 1980s, it narrowed its emphasis to dredging and related maritime work. In the 1990s, it resumed expansion through acquisitions and international projects. Its activities included land reclamation for Hong Kong’s Chek Lap Kok airport, participation in Singapore development programs and work connected with the construction of a gas and container port at Ras Laffan in Qatar. The company also acquired a 40 percent interest in Archirodon Group, later selling that holding in 2013. The company entered the twenty-first century with increasingly broad maritime and infrastructure capabilities. Around 2000, it explored a possible combination with Hollandsche Beton Groep, but the proposed transaction did not proceed. By the middle of the decade, Boskalis was undertaking major Australian port-deepening and harbor-expansion work as well as a large port-development contract in Abu Dhabi. It also expanded through maritime acquisitions. A prolonged effort to acquire Smit International culminated in an agreed offer in 2010. MNO Vervat was acquired in 2011, and Dockwise, a heavy marine transport company, was acquired in 2013. These transactions broadened the group beyond conventional dredging into specialized transport, salvage, offshore support and marine construction. Boskalis has since worked on major international projects such as the Suez Canal expansion, for which Egypt signed a large dredging contract involving Boskalis and other multinational firms. The company also became an important contractor in offshore wind, using installation vessels and cable-laying ships to connect offshore generation assets with onshore electricity networks. By 2024, offshore wind-related work accounted for about half of the company’s offshore-energy revenues, according to the supplied reference material. In 2019, Boskalis announced a program to sell its worldwide harbor-towage interests, reflecting a strategic focus on dredging, offshore energy, heavy marine transport and selected maritime services. Its specialist capabilities received international attention in 2021 when Boskalis tugboats assisted in the operation that freed the Ever Given from the Suez Canal. The group has also participated in major contemporary projects including Malmporten in Sweden and the New Manila International Airport reclamation project in the Philippines. HAL Investments approached Boskalis in early 2022 and completed a transaction valued in the reference material at approximately €4.3 billion. After HAL obtained more than 95 percent of the shares, Boskalis was delisted from Euronext Amsterdam and ceased to be a publicly traded company. The brand remains active as an international maritime infrastructure business, combining dredging, reclamation, offshore wind, heavy transport and marine services.
- 2022
Delisted after HAL takeover
[1]HAL Investments acquired more than 95 percent of Boskalis shares, after which the company was delisted from Euronext Amsterdam.
- 2021
Ever Given salvage assistance
[1]Boskalis tugboats assisted the operation to free the Ever Given from the Suez Canal.
- 2013
Dockwise acquired
[1]Boskalis acquired Dockwise, strengthening its heavy marine transport business.
- 2010
Smit International acquisition agreed
[1]Boskalis reached agreement on the acquisition of Smit International.
- 1978
Royal designation
[1]The company received the Dutch royal designation.
- 1970
Public listing
[1]Boskalis became a public company.
- 1933
Westminster partnership
[1]A partnership with Westminster Dredging Company expanded international business opportunities, particularly in West Africa.
- 1931
Bromborough Dock contract
[1]The company signed a contract to dredge Bromborough Dock in England.
- 1910
Company founded
[1]Johannes Kraaijeveld and Eliza van Noordenne founded the business that became Boskalis.
Products and positioning
A technically advanced international maritime infrastructure specialist with large-scale dredging, heavy-transport and offshore-energy capabilities.
Maritime infrastructure
Dredging
Boskalis’ core business covers capital dredging for new ports, waterways and reclamation sites, together with maintenance dredging that preserves navigable depth. The work combines dredgers, survey systems, marine logistics, disposal or beneficial reuse of sediment, and project engineering. It has supported major port, waterway and reclamation programs across multiple continents.
Civil engineering
Land reclamation
The company creates and stabilizes new land using dredged sand and other marine-material handling techniques. Reclamation services support airports, ports, industrial zones, coastal defenses and urban expansion. Notable referenced work includes projects associated with Hong Kong’s Chek Lap Kok airport, Singapore development programs and the New Manila International Airport.
Offshore energy
Offshore wind installation
Boskalis provides marine construction and installation services for offshore wind farms. Its capabilities include foundation and component logistics, offshore installation support and subsea cable laying. Cable-laying vessels connect offshore wind generation sites to land-based grids. Offshore wind has become a significant component of the group’s offshore-energy activities.
Marine transport · 2013
Heavy marine transport
Through Dockwise and related capabilities, Boskalis transports oversized ships, offshore structures and other heavy project cargo by sea. The service uses specialized semi-submersible vessels and project planning to load, transport and discharge assets that cannot be moved economically by conventional shipping.
Maritime services
Marine salvage and emergency response
Boskalis’ maritime-services portfolio includes salvage, wreck removal, towage and emergency response. Its specialist vessels and crews can support refloating, towing and marine recovery operations. The group’s role in the 2021 Ever Given incident demonstrated the public visibility of these capabilities.
Controversies
Brand decisions
2022
HAL Investments takeoverM&ABackground
HAL Investments approached Boskalis with a takeover offer after Boskalis had operated as a listed Dutch company for decades.
Action taken
HAL completed the offer and obtained more than 95 percent of Boskalis shares, enabling the company to be delisted from Euronext Amsterdam.
Aftermath
Boskalis became privately controlled by HAL Investments and no longer had a public Euronext Amsterdam ticker.
Transaction valuation. (2022)
2019
Divestment of harbor-towage interestsStrategyBackground
Boskalis reviewed its portfolio of harbor-towage activities across several regions.
Action taken
The company announced the sale of interests in Saam Smit Towage, Kotug Smit Towage and Keppel Smit Towage.
Aftermath
The move reduced the group’s exposure to harbor towage and sharpened its focus on dredging, offshore energy, heavy transport and selected maritime services.
Recent events
- Unconfirmed
Reported
Boskalis acquires the Southern Ocean vessel[3]
Boskalis said it has acquired the Southern Ocean, a large DP2 construction support vessel previously jointly owned by Oceanteam and Bourbon.
- Unconfirmed
Reported
Boskalis acquires Ardent Americas[4]
Royal Boskalis Westminster N.V. reported that it had acquired Ardent Americas LLC, a U.S. provider of maritime emergency response services.
- Unconfirmed
Reported
Boskalis acquires remaining stake in Horizon Group[5]
Royal Boskalis Westminster acquired the remaining 37.5% stake in Horizon Group, following its earlier acquisition of 62.5%.
Sources5 sources
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