The company was founded in 1891 by
Hans Peter Prior, who would later become chairman of the Danish industry council, under the name of
Nordisk Elektrisk Ledningstraad og Kabel-Fabrik. It quickly expanded, buying up other companies. A new factory on
Ryesgade was inaugurated. In 1898, it was named
Nordiske Kabel og Traadfabrik, from which is derived its current name: NKT. A new cable factory was constructed at La Cour Vej in 1907 and a new head office was constructed next to the factory in the 1930s. Over the next decades the company was active in a number of sectors outside the cable industry, including
glass,
aluminium,
steel,
nails, fasteners etc., primarily for the Danish market. In the 1960s, NKT started recycling scrap from cable production in its facility in
Stenlille, Denmark. The company introduced lead-free cables and halogen and PVC-free cables as part of a renewed environmental focus in the 1990s. In 1990 the current company structure was established. Over the next 10 years, a series of mergers and sell offs were made with the aim of concentrating on a smaller number of core businesses. NKT Holding sold the electricity distribution manufacturer Lauritz Knudsen to Schneider in 1999, the semi-conductor manufacturer GIGA to
Intel in 2000, and the underwater pipe manufacturer NKT Flexibles in 2012. In 1999 NKT acquired German cable manufacturer Felten & Guilleaume, doubling the production capacity and adding businesses in the
Czech Republic,
China, and
Austria. NKT headquarters subsequently moved to
Cologne. In 2013, NKT acquired Swedish cable manufacturer Ericsson Cables in
Falun,
Sweden. In 2016, the NKT Board of Directors announced the intent to split NKT Holding A/S into two separately listed companies, NKT (incl. NKT Photonics) and
Nilfisk, as a consequence of the acquisition of ABB HV Cables business. The split took place in October 2017. In 2017, NKT acquired Swedish-Swiss High-Voltage Cable Manufacturer, ABB HV Cables from the ABB Group including the high-voltage plant in
Karlskrona and the cable-laying vessel NKT Victoria along with offices in
Karlskrona,
Alingsås, and part of the offices in
Malmö,
Rotterdam and
Mannheim. In 2024, NKT sold NKT Photonics to focus 100% on electricity cables. In the same year, NKT acquired SolidAl, a Portugal-based power cable manufacturer, adding medium- and high-voltage capacity to meet the growing demand from grid upgrades and renewable energy projects across Europe. ==Business areas==