Nexans S.A. is a global company in the cable and optical fibre industry headquartered in Paris, France.

[1][2] The group is active in four main business areas: buildings and territories (construction, local infrastructure, smart cities / grids, e-mobility), high voltage and projects (offshore wind farms, subsea interconnections, land high voltage), data and telecoms (telecom networks), data transmission, FTTx, LAN cabling, renewable energies, petroleum, railways and rolling stock, aeronautical and automation.

[3][4][5] It is the world's second largest manufacturer of cables after Prysmian S.p.A.[6] In 2017 the Group operated in 34 countries with over 26,000 employees and sales of around €6.4 billion.

[7] Nexans was founded in 2000 as a business unit of the telecommunications firm Alcatel after its acquisition of a number of companies in the cable sector.

[9] In 2020 Nexans shut down its Chester, New York factory and exited the US building wire market.