436 active UK companies are classified under transmission of electricity (SIC code 35120), a specialised sector. This sector falls under Section D — Electricity, gas, steam and air conditioning supply — of the UK Standard Industrial Classification. The sector has a relatively low 6.9% dissolution rate — 436 of 525 registrations remain active. The sector is experiencing rapid growth, with 121.2% of active businesses incorporated since 2020 — indicating strong recent demand. 103% of companies were formed after 2010, marking this as a sector with predominantly recent entrants. The average company age in this sector is 8.4 years. 56 large companies, 0 medium-sized firms operate in this sector. London leads with 28% of companies in this sector. Companies in this sector hold 7 government contracts valued at £3.2M.
Source: Companies House register via UVAGATRON, September 2026
A rapidly growing sector with 121.2% of active companies formed since 2020.
The transmission of electricity sector has a <Link href="/glossary/company-dissolution">6.9% dissolution rate</Link>. The average active company in this sector is 8.4 years old. Geographic concentration: 28% in LONDON.
Companies in the transmission of electricity sector have been awarded 7 government contracts worth £3.2M in total.
There are 436 active companies classified under SIC code 35120 (Transmission of electricity) in the UK, out of 525 total registered.
SIC code 35120 stands for "Transmission of electricity". It belongs to Section D — Electricity, gas, steam and air conditioning supply of the UK Standard Industrial Classification.
The largest concentrations are in LONDON (123), GLASGOW (13), CHELTENHAM (11).
The average active transmission of electricity company in the UK is 8.4 years old, with the oldest registration dating back to 1987.
Our database contains 3,840 data signals across 10 categories for active transmission of electricity companies. The largest category is Governance with 1,380 signals from 3 government sources.
5.9M companies, 50M+ signals from 53 government sources. Risk scores, director networks, entity analysis.