Topsoe

Topsoe is a Danish industrial technology company founded in 1940 by chemist and engineer Haldor Topsøe. Historically known as Haldor Topsøe, the company develops heterogeneous catalysts, catalytic process technologies, engineering services, and technologies intended to reduce emissions and support the energy transition. Its work spans refining, chemicals, fertilizers, hydrogen, ammonia, methanol, clean fuels, fuel cells, and industrial emissions control. The company operates across the industrial value chain rather than functioning primarily as a consumer-facing product brand. It supplies catalysts and process designs that help customers convert feedstocks into useful products or remove pollutants from industrial exhaust. Its technologies can process hydrocarbon feedstocks such as natural gas as well as renewable inputs including electricity, waste, and bio-based materials. Areas of particular importance include ammonia synthesis, hydroprocessing, ultra-low-sulfur diesel, renewable fuels, hydrogen production, and emissions treatment. Topsoe's modern strategic focus is the decarbonization of sectors that are difficult to electrify directly. These include iron and steel, chemicals, cement, aviation, shipping, trucking, and the production of clean fuels. The company has developed solid oxide electrolysis cell technology, including high-temperature solid oxide electrolyzer systems designed to produce hydrogen and other products with potentially improved electrical efficiency when suitable heat is available. It also remains a major participant in catalyst technologies used in ammonia production, an industry with direct relevance to global fertilizer supply and potential future uses of ammonia as an energy carrier. Topsoe's headquarters and principal research facilities are in Kongens Lyngby, north of Copenhagen. Catalyst manufacturing has historically been associated with facilities in Frederikssund, Denmark, and Bayport in the United States. The company has maintained offices and commercial activities in numerous countries, including Argentina, Australia, Bahrain, Brazil, Canada, China, India, Indonesia, Iran, Malaysia, Mexico, Saudi Arabia, and the United States. It collaborates with the Technical University of Denmark, and its research has been reported in scientific and engineering publications. The business has undergone several ownership and strategic changes. It became a public limited company in 1972 through a 50/50 ownership arrangement involving Haldor Topsøe and the Italian engineering company Snamprogetti. The founder's interests later repurchased the shares held through the Italian group in 2007. In 2019, Singaporean investment company Temasek acquired a 30 percent stake. The company adopted the shorter Topsoe name in 2022, reflecting a broader identity around catalytic and energy-transition technologies. In the same year, it announced what was described as the world's largest electrolyzer order at that time, involving 5 GW of solid-oxide electrolysis capacity. Topsoe is privately held and does not publish a public stock ticker. Its current business identity combines long-established catalyst expertise with newer technologies for hydrogen, renewable fuels, and industrial decarbonization. The company has also faced criticism over the sustainability implications of projects involving palm-oil-derived sustainable aviation fuel and over its participation in European policy lobbying concerning green-hydrogen targets and public investment.

Topsoe was established in 1940 by Dr. Haldor Topsøe in Denmark. During the Second World War, the young company obtained permission to use laboratories associated with the Polytechnic Educational Establishment. In 1943 it moved to facilities in Hellerup, north of Copenhagen, gaining access to equipment that allowed it to broaden its research and consulting work. During the war it provided consultancy services to Swedish companies, with some of the company's Swedish contacts arranged through the Wallenberg group. The company began commercial catalyst production during the 1940s. In 1944 it produced its first small batch of sulfuric-acid catalysts. In 1948 it completed development of its first nickel catalyst and began working with Vargöns AB in Sweden on an ammonia-synthesis catalyst. These activities established the combination of fundamental catalysis research, catalyst manufacturing, and industrial process development that became central to the company's business. After the war, Topsoe participated in technical-development projects in Mexico connected with American financial and development networks. The work included involvement in planning aspects of Mexico's technical development and contact with agronomist Norman Borlaug's wheat experiments in the Sonora region. From the 1950s, the company also renewed scientific and engineering contacts with institutions in the Soviet Union and remained active in international catalysis networks. In 1955 Topsoe established the French subsidiary Haldor Topsøe S.A. and opened a Paris office. The company participated in a range of industrial projects, including the construction of a heavy-water plant in northern France. In 1958 it acquired the Linderupgaard estate near Frederikssund, Denmark; the site subsequently became an important catalyst-production location. International expansion continued in North America. Topsoe opened Haldor Topsoe Inc. in New York in 1961 and acquired land in Houston, Texas, in 1965. The Houston office later became the company's principal United States base, and the office was moved there from New York in 1971. Topsoe also delivered process designs and technologies for major ammonia plants in several countries. The ownership structure changed in 1972, when the business became a public limited company owned equally by Haldor Topsøe and the Italian engineering company Snamprogetti. The headquarters moved from Vedbæk to Søborg in 1973 and then to its present location in Kongens Lyngby in 1974. During the 1980s, Topsoe opened offices in Delhi and Beijing. During the 1990s it added offices and departments in Russia and the United States, including locations in Moscow, Yaroslavl, and Los Angeles. In 2007, Haldor Topsøe repurchased the shares held by the Italian group, which had become part of Saipem through its acquisition of Snamprogetti. The transaction returned the company to the control of the founder's interests. That year, the subsidiary Topsoe Fuel Cell began construction of a Danish production facility for high-temperature solid oxide fuel cells. The fuel-cell initiative extended Topsoe's expertise from industrial catalysts into electrochemical technologies for generating electricity and heat. Topsoe subsequently changed the composition of parts of its catalyst business. In 2017, Umicore agreed to acquire Haldor Topsoe's heavy-duty diesel and stationary catalyst businesses. In 2019, Topsoe sold a 30 percent stake to Singaporean investment company Temasek. Haldor Topsøe, who had remained chairman from the company's foundation, died in 2013 at the age of 99. On 2 June 2020, Roeland Baan succeeded Bjerne S. Clausen as president and chief executive officer. In 2022 the company adopted the shorter Topsoe name. The rebrand coincided with a stronger emphasis on technologies for decarbonizing heavy industry, transport, clean fuels, hydrogen, and ammonia. In September of that year, Topsoe announced a 5 GW solid-oxide electrolysis order, described in the reference material as the largest hydrogen-electrolysis order then recorded. Topsoe's current activities combine catalyst manufacturing, process-plant design, technical services, and research into solid oxide electrolysis. Its principal facilities remain centered in Denmark, with additional manufacturing and commercial operations abroad. The company works with universities and industrial customers and continues to position catalysis as a tool for reducing emissions while enabling production of fuels, chemicals, fertilizers, hydrogen, and other industrial materials. Its transition-focused strategy has also generated criticism, particularly concerning the environmental effects of palm-oil feedstocks and the role of corporate lobbying in shaping European hydrogen policy.

1. 2022Haldor Topsøe brand renamed Topsoe

   The company adopted Topsoe as its shorter corporate and brand name.

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2. 2022Large solid-oxide electrolysis order announced

   Topsoe announced a 5 GW solid-oxide electrolysis order described as the world's largest at the time.

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3. 2020Roeland Baan becomes chief executive

   Roeland Baan took over as president and chief executive officer on 2 June 2020.

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4. 2019Temasek acquires minority stake

   Singaporean investment company Temasek acquired a 30 percent stake in Topsoe.

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5. 2017Heavy-duty diesel and stationary catalyst businesses sold

   Umicore agreed to acquire Topsoe's heavy-duty diesel and stationary catalyst activities.

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6. 2007Founder interests repurchase Italian group's stake

   Haldor Topsøe bought back the shares held through the Italian contracting group.

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7. 2007Fuel-cell production initiative launched

   Topsoe Fuel Cell began construction of a Danish plant for high-temperature solid oxide fuel cells.

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8. 1972Conversion to a public limited company

   Ownership changed to a 50/50 structure involving Haldor Topsøe and Snamprogetti.

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9. 1958Frederikssund production site acquired

   Topsoe acquired the Linderupgaard estate near Frederikssund, later used for catalyst production.

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10. 1955French subsidiary established

    Haldor Topsøe S.A. was established in France and an office opened in Paris.

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11. 1948Nickel and ammonia-catalyst development

    The company completed its first nickel catalyst and began cooperation on ammonia-synthesis catalyst development with Vargöns AB.

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12. 1944First sulfuric-acid catalyst batch

    Topsoe produced its first small batch of sulfuric-acid catalysts.

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13. 1940Company founded by Haldor Topsøe

    Haldor Topsøe founded the Danish catalysis and industrial-technology company.

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A science-led industrial catalyst and process-technology provider focused on hard-to-abate sectors and the global energy transition.

• Hydroprocessing catalystsRefining and clean fuels

  Catalyst systems used to remove sulfur and other impurities from refinery streams and to upgrade hydrocarbon or renewable feedstocks. They support production of ultra-low-sulfur diesel and other cleaner fuels, and form part of Topsoe's longstanding refining and process-technology portfolio.

• Ammonia synthesis catalysts and process technologyFertilizer and chemicals1948

  Catalysts and plant technologies for ammonia production. Topsoe has worked on ammonia synthesis since the late 1940s and supplies technologies relevant to conventional fertilizer production as well as emerging projects involving lower-carbon hydrogen and ammonia.

• Solid oxide electrolyzer cellsHydrogen and electrolysis

  High-temperature electrolysis technology designed to convert electricity and water into hydrogen. Solid oxide systems can use available heat alongside electrical energy and are aimed at industrial applications, including large-scale hydrogen and e-fuel projects.

• Emission-control catalystsEnvironmental technology

  Catalyst technologies intended to reduce pollutants from industrial and transport-related exhaust streams. The portfolio has included stationary and heavy-duty applications, although Topsoe's former heavy-duty diesel and stationary catalyst businesses were sold to Umicore in 2017.

• Sulfuric-acid catalystsChemical-process catalysts1944

  One of Topsoe's earliest commercial catalyst lines, with the first small production batch reported in 1944. These catalysts support sulfuric-acid manufacturing and represent the company's early transition from research and consultancy into industrial catalyst supply.

• Solid oxide fuel-cell technologyFuel cells2007

  High-temperature solid oxide fuel-cell technology developed through Topsoe Fuel Cell. The initiative included a Danish production plant intended for applications requiring electricity and heat, including buildings, hospitals, supermarkets, and vehicles.

• 2022Rebrand from Haldor Topsøe to TopsoeStrategy

  The company was broadening its identity beyond its historical catalyst business toward hydrogen, electrolysis, clean fuels, and industrial decarbonization.

  What changed. The company adopted Topsoe as its corporate and brand name.

  Aftermath. The shorter name emphasized the company's energy-transition strategy while retaining continuity with the Haldor Topsøe heritage.

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• 2022Large-scale solid-oxide electrolysis commitmentProduct launch

  Topsoe was expanding its high-temperature electrolysis business for industrial hydrogen and related energy-transition applications.

  What changed. Topsoe announced a 5 GW solid-oxide electrolysis order, described as the largest hydrogen-electrolysis order at that time.

  Aftermath. The announcement reinforced Topsoe's positioning as a supplier of large-scale electrolysis technology for hard-to-abate sectors.

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• 2019Minority investment by TemasekM&A

  Topsoe sought investment while remaining a privately held industrial technology company.

  What changed. Singaporean investment firm Temasek acquired a 30 percent stake in Topsoe.

  Aftermath. The investment brought a major international institutional shareholder into the ownership structure.

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• 2017Sale of heavy-duty diesel and stationary catalyst businessesM&A

  Topsoe reshaped its catalyst portfolio while Umicore expanded its emissions-control activities.

  What changed. Umicore agreed to acquire Topsoe's heavy-duty diesel and stationary catalyst businesses.

  Aftermath. The divestment narrowed Topsoe's direct exposure to those catalyst applications while supporting a greater strategic emphasis on process technology and energy-transition markets.

  Enterprise value. DKK 900 million plus an earn-out (2017 transaction announcement)

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• 2007Repurchase of the Italian group's stakeM&A

  Topsoe had become jointly owned by Haldor Topsøe and Snamprogetti in 1972; Snamprogetti was later acquired by Saipem.

  What changed. Haldor Topsøe bought back all shares held by the Italian contracting group, returning the company to the control of the founder's interests.

  Aftermath. The transaction restored founder-family control before the later minority investment by Temasek.

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• 2022Criticism of palm-oil-based sustainable aviation fuel projectControversy

  Topsoe's investment in a planned Manaus, Brazil, facility producing sustainable aviation fuel from palm oil was criticized by Danish media and environmental experts. Critics argued that palm-oil cultivation can contribute to deforestation, biodiversity loss, and climate emissions, and that sustainability certification would not necessarily resolve the underlying feedstock concerns.

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• 2022Criticism of green-hydrogen lobbyingControversy

  Corporate Observatory Europe criticized Topsoe's participation in European Union-level lobbying concerning higher green-hydrogen targets and expanded public funding for hydrogen infrastructure. The criticism focused on the possibility that policy emphasis and funding could be diverted toward hydrogen projects rather than nearer-term emissions-reduction measures.

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• 2022Topsoe wins major solid-oxide electrolysis order

  Topsoe announced an order involving 5 GW of solid-oxide electrolysis capacity, described in the reference material as the largest hydrogen-electrolysis order at that time.

  Product launchOther
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1. Topsoe
2. Topsoe official website