Producer
Topsoe A/S
Danish specialty chemicals and catalysts company (Nasdaq Copenhagen: TOP, hybrid listing January 2025); ~40% of all global ULSD is produced using Topsoe's TK-series hydrotreating catalysts. Founded in the 1940s by Haldor Topsoe; family-controlled. Three critical catalyst lines: (1) Haber-Bosch ammonia synthesis catalysts (KM1) for fertilizer production; (2) Hydrotreating catalysts (CoMo/NiMo) for ULSD and gasoline desulfurization; (3) Solid oxide electrolysis cells (SOEC) for green hydrogen production — 500 MW SOEC facility operational in Herning, Denmark; 1 GW plant planned in Virginia, USA. Bayport, Texas catalyst plant in addition to Frederikssund Denmark primary site.
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Inputs supplied
3
Goods downstream
2
Facilities
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Stories
What they make
2 inputs Topsoe A/S supplies
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Goods downstream
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Where they make it
2 facilities
Topsoe Bayport Texas Catalyst Plant →
USTexas · manufacturing
Topsoe North American catalyst manufacturing facility in Bayport, Texas (Houston Ship Channel area). Produces hydrotreating catalysts for U.S. refinery market. Serves as regional backup/supplement to Frederikssund Denmark primary production. Source: https://www.topsoe.com/solutions/outputs/conventional-fuels/hydrotreating
Topsoe Catalyst Manufacturing — Frederikssund →
DKCapital Region · manufacturing
Topsoe primary hydrotreating catalyst manufacturing facility in Frederikssund, Denmark (~30 km west of Copenhagen). P6 production unit added specifically for ULSD catalysts. Also produces Haber-Bosch ammonia synthesis catalysts (KM1 series) from the same site — the world's most critical diesel desulfurization catalyst and the most critical ammonia synthesis catalyst are both made in Frederikssund. Source: https://www.topsoe.com/blog/2014/03/haldor-topsoe-expands-catalyst-plant-frederikssund
What else they do
Business segments
The company's full revenue map — where this supply-chain role fits within their broader business.
Hydrotreating Catalysts (TK-Series — ULSD World Leader)
35%Ammonia Synthesis Catalysts (KM-Series — Feeds Half Humanity)
28%Solid Oxide Electrolysis (SOEC — Green Hydrogen)
18%Methanol, Sulfur, and Process Technologies
19%
Intelligence
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Did you know2024
Topsoe (Frederikssund, Denmark) is the only company in the world that simultaneously holds dominant positions in three entirely separate energy chemical markets: (1) ~40% of global ULSD is produced using Topsoe TK-series hydrotreating catalysts — the chemistry that removes sulfur from diesel and gasoline; (2) Topsoe's KM1 iron-based catalyst is foundational to Haber-Bosch ammonia synthesis, underpinning global fertilizer production; (3) Topsoe's SOEC (solid oxide electrolysis cell) technology is one of the leading approaches for industrial-scale green hydrogen production — 500 MW operational in Herning, Denmark, 1 GW planned in Virginia, USA. A single family-controlled Danish company is a critical node in fossil fuel desulfurization, food production (via fertilizer), and the clean energy transition simultaneously.
Topsoe ↗Capacity2023
Topsoe's Solid Oxide Electrolysis Cell (SOEC) technology represents the most efficient form of water electrolysis for green hydrogen production. SOEC operates at 700-900°C using oxygen-ion conducting ceramics (yttria-stabilized zirconia); at this elevated temperature, part of the energy input can come from cheap waste heat rather than expensive electricity — achieving >90% electrical efficiency vs ~70-75% for PEM or alkaline electrolysis. Topsoe completed the world's largest SOEC production facility in Herning, Denmark (500 MW/year capacity) and announced a 1 GW facility in Virginia, USA. A refinery catalyst company building the world's most efficient hydrogen electrolyzers is one of the most unexpected clean energy supply chain pivots of the 2020s — the same electrochemistry expertise that develops catalysts for fossil fuel processing has been repurposed for green hydrogen manufacturing.
Topsoe A/S ↗Origin2023
Topsoe A/S was founded in 1940 in Copenhagen, Denmark by Haldor Topsoe — a physical chemist who had developed expertise in industrial catalysis. The founding was driven by Denmark's need for synthetic ammonia during WWII when natural resources were cut off. The family has controlled the company continuously for 85 years (the Topsoe Foundation holds majority control); Topsoe listed on Nasdaq Copenhagen in January 2025 in a hybrid IPO that maintained family control while providing liquidity. The company grew to become one of the world's most respected catalysis research organizations — with approximately 600 R&D scientists (one of the highest ratios of scientists to total employees in the chemical industry) developing catalysts for ammonia synthesis, refinery desulfurization, methanol synthesis, and now solid oxide electrolysis for green hydrogen.
Topsoe A/S ↗