Haldor Topsøe (company)  Haldor Topsøe is a Danish catalysis company founded in 1940 by Haldor Topsøe (1913–2013). The company has approximately 2,300 employees, of which 1,700 work in Denmark. Haldor Topsøe specialises in the production of heterogeneous catalysts and the design of process plants based on catalytic processes. Focus areas include the fertiliser industry, chemical and petrochemical industries, and the energy sector (refineries and power plants). Haldor Topsøe A/S is one of the world's leading companies within the field of heterogeneous catalysis, and over 50 per cent of the ammonia used for fertilizer on a worldwide scale is made with the help of technology from Haldor Topsøe. 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 the United States. The company has offices in Argentina, Bahrain, Brazil, Canada, China, India, Indonesia, Iran, Malaysia, Mexico, Russia, Saudi Arabia and the United States. Haldor Topsøe's catalysts and technologies are used to clean oil and ensure more environmentally friendly fuels, for cleaning power industry flue gasses, for converting hydrocarbon feedstocks such as natural gas and LPG into ammonia, hydrogen and methanol, and for reducing emission 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, 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. Haldor Topsøe A/S was founded in 1940 by 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.