UK SIC 2007 code in Section D: Electricity, gas, steam and air conditioning supply

35120 Transmission of electricity

SIC 35120 is the UK code for transmission of electricity. Companies House accepts it when you register a company or file a confirmation statement.

Code: 35120 (UK SIC 2007, Companies House list)
Section: Section D: Electricity, gas, steam and air conditioning supply
Division: 35 Electricity, gas, steam and air conditioning supply
SIC 2026: 35.13 Transmission of electricity (1:1)
Closest US NAICS: 221111, 221112, 221113, 221114 and 6 more

Activities ONS lists under 35120

The ONS index assigns these 1 activities to this code. If one describes your company, this is the code to use.

Electricity transmission system operation (power station to substation)

Source: ONS UK SIC 2007 alphabetical index.

What changes in SIC 2026

ONS published UK SIC 2026 in 2026. Its correspondence table maps this code's class (35.12) to:

SIC 2026 code	Heading	Link type
35.13	Transmission of electricity	1:1

"1:1" means the class carries over unchanged in scope; other link types mean it was split or merged. Companies House still uses SIC 2007, so keep filing with 35120 until it announces a switch.

Source: ONS correspondence table, SIC 2007 to SIC 2026.

Closest US NAICS codes

Matched through the shared international class (ISIC Rev. 4). Treat these as a starting point and read the definition before using one.

Similar codes to compare

Data last changed November 14, 2026. Source: Companies House condensed SIC list. How this page is built.