13 new companies under SIC 42120: Construction of railways and underground railways
13 UK companies registered with SIC 42120 in the last
Part of Construction
Recently Registered
17503512 · London
17491457 · Wetherby
17485603 · Crewe
17476918 · Brighton
17477876 · Harrow
17474209 · Faversham
17472145 · Worksop
SC902914 · Motherwell
17459670 · Swansea
17454272 · London
17452354 · Sandbach
17449367 · Slough
17446818 · Luton
Track newly registered UK construction of railways and underground railways companies at Companies House. This page lists recent incorporations and formation trends for Construction of railways and underground railways.
51 new Construction of railways and underground railways companies were registered in the last 90 days - about 1 a day.
Monthly registrations over recent complete months have ranged from 12 to 40.
Last month's registrations were down 10% versus the month before.
A sample of this week's matching leads
- L T CONSTRUCTION SERVICES LIMITEDIncorporated 2026-09-30 · Wetherby
- RAIL BASED CONTRACTING SERVICES LTDIncorporated 2026-09-28 · Crewe
- ADD22 LTDIncorporated 2026-09-23 · Harrow
- AH RAIL AND CIVILS LIMITEDIncorporated 2026-09-23 · Brighton
- FRESH RAIL LTDIncorporated 2026-09-22 · Faversham
- RB RAIL LIMITEDIncorporated 2026-09-21 · Worksop
NewcoSignal monitors Companies House daily and emails you new construction of railways and underground railways companies as they are registered.
Get these leads freeRelated SIC codes
- SIC 41100 - Development of building projects
- SIC 41201 - Construction of commercial buildings
- SIC 41202 - Construction of domestic buildings
- SIC 42110 - Construction of roads and motorways
- SIC 42130 - Construction of bridges and tunnels
- SIC 42210 - Construction of utility projects for fluids
- SIC 42220 - Construction of utility projects for electricity and telecommunications
- SIC 42910 - Construction of water projects
Frequently Asked Questions
What is SIC code 42120?
SIC code 42120 is the UK Standard Industrial Classification code for "Construction of railways and underground railways". Every company registered at Companies House must declare at least one SIC code describing its main business activity.
How many new companies register with SIC code 42120 each week?
Use the date range filter above to see the exact count of new registrations for SIC code 42120 over your chosen period. Volume varies by sector and economic conditions.
Can I set up alerts for new SIC 42120 companies?
Yes. Save a search in NewcoSignal filtered to the industry category that includes SIC code 42120 and receive a weekly or daily email digest of every new matching company. Available on all plans including the free tier.
Are newly registered SIC 42120 companies good B2B leads?
New company registrations under any SIC code represent businesses that are actively choosing their first suppliers - accountant, insurance, IT support, software, and more. Being first in touch with newly incorporated businesses before competitors reach them is a significant commercial advantage.
What is the difference between a UK SIC code and a US NAICS code?
UK SIC codes (like 42120) are used by Companies House to classify business activities in Great Britain. NAICS codes are the equivalent classification used in the United States, Canada, and Mexico. The two systems cover similar industries but with different structures and numbering. Use the SIC to NAICS converter to find the nearest North American equivalent for any UK SIC code.