Topsoe (previously Haldor Topsøe) is a Danish company founded in 1940 by Haldor Topsøe. The company has approximately 2,300 employees, of which 1,700 work in Denmark. Topsoe develops solutions for a decarbonized world, supplying technology, catalysts, and services for the global energy transition. The company specializes in carbon emission reduction technologies. That includes proprietary Solid oxide electrolyzer cell (SOEC) high-temperature electrolysis technology, the production of heterogeneous catalysts and the design of process plants based on catalytic processes. Focus areas include hard-to-abate sectors such as heavy industry (steel and iron, chemicals, cement), long-haul transportation (aviation, shipping, trucking) and clean fuels (bio-diesel and ultra-low-sulfur diesel (ULSD). Topsoe works within the field of heterogeneous catalysis, and over 50 per cent of the ammonia used for fertilizer worldwide is made with the help of technology from Topsoe. The headquarters and main research labs are located in Lyngby, a northern suburb of Copenhagen, Denmark, manufacturing of catalysts is carried out in Frederikssund, Denmark and Bayport Industrial District in the United States. The company has offices in Argentina, Australia, Bahrain, Brazil, Canada, China, India, Indonesia, Iran, Malaysia, Mexico, Saudi Arabia and the United States. Topsoe's catalysts and technologies are used for converting renewable feedstocks such as renewable electricity and waste or hydrocarbon feedstocks such as natural gas into ammonia, hydrogen, diesel and methanol. Other main business areas are to clean oil and ensure more environmentally friendly fuels, cleaning industry flue gasses, and reducing emissions from industry. In chemical plants catalysts and processes optimize resources, ensuring highly efficient energy processes. The company frequently collaborates with the Technical University of Denmark and its research has been regularly published in scientific journals. The founder, Dr. Haldor Topsøe, died on 20 May 2013 after a short illness, just four days before his 100th birthday. He was the chairman of the company from its founding until his death. Jeppe Christiansen is now chairman of the board. Bjerne S. Clausen was president and CEO until June 2020. On June 2, 2020, Roeland Baan took over as president and CEO. History Topsoe was founded in 1940 by Dr. Haldor Topsøe. During World War II, the company got permission to use the labs at the Polytechnic Educational Establishment, and in 1943 they moved to facilities in Hellerup, north of Copenhagen. The move meant that the company could expand its field of work because of the access to additional equipment. During the war, Topsoe worked