Railways, underground
UK companies organised by the CorpSignals industry, segment, and subsegment taxonomy.
Company snapshot
What this shows: the size and current activity of this classification, plus recent formations, company age, revenue coverage, and trade participation.
All companies
5813
Active companies
3925
Formed in latest 12 months
261
Median active-company age
7.8 years
Revenue known
69
Importers
31
Exporters
17
Top values shown in the chart
| Category | Companies |
|---|---|
| All companies | 5,813 |
| Active companies | 3,925 |
| Formed in latest 12 months | 261 |
| Importers | 31 |
| Exporters | 17 |
Revenue coverage among active companies: 69 known, 3856 unknown (1.8%).
Company formations
What this shows: monthly incorporations and dissolutions from 1 January 2024, including companies of every current status.
Latest ten months shown in the chart
| Month | Formed | Dissolved |
|---|---|---|
| 2025-11 | 24 | 53 |
| 2025-12 | 18 | 65 |
| 2026-01 | 28 | 53 |
| 2026-02 | 11 | 53 |
| 2026-03 | 22 | 55 |
| 2026-04 | 17 | 53 |
| 2026-05 | 20 | 64 |
| 2026-06 | 24 | 53 |
| 2026-07 | 21 | 72 |
| 2026-08 | 9 | 51 |
Window: 2024-01 to 2026-08.
Company status
What this shows: all current Companies House status values. Companies House Active records with dormant accounts are shown as Dormant; the remaining Companies House Active records are shown as Active. Blank and missing values are combined as Unknown.
Top values shown in the chart
| Status | Companies |
|---|---|
| Active | 3,556 |
| Dissolved | 1,800 |
| Dormant | 369 |
| Liquidation | 85 |
| In Administration | 3 |
Active companies by UK region
What this shows: active companies with a known ITL2 region. The UK map falls back to a bar chart if map data cannot be loaded.
Top values shown in the chart
| ITL2 region | Companies |
|---|---|
| Outer London - East and North East | 481 |
| Inner London - East | 379 |
| Kent | 337 |
| Essex | 276 |
| Outer London - West and North West | 258 |
| South East Wales | 242 |
| Bedfordshire and Hertfordshire | 175 |
| Inner London - West | 117 |
| West Midlands | 117 |
| Greater Manchester | 111 |
Geography coverage: 3892 known, 33 unknown (99.2%).
Revenue ranges
What this shows: active companies grouped into the platform’s ordered estimated-revenue bands.
Top values shown in the chart
| Revenue range | Companies |
|---|---|
| 0-1m | 2,707 |
| 1m-15m | 283 |
| 15m-54m | 10 |
| 54m+ | 25 |
Revenue-range coverage: 3025 known, 900 unknown (77.1%).
Company size and employees
What this shows: active companies by published size category and by reported employee count.
Top values shown in the chart
| Company size | Companies |
|---|---|
| Micro | 1,779 |
| Small | 1,095 |
| Medium | 1 |
| Large | 38 |
| Holding | 1 |
| Dormant | 369 |
Company-size coverage: 3283 known, 642 unknown (83.6%).
Top values shown in the chart
| Employees | Companies |
|---|---|
| 0 | 647 |
| 1–9 | 2,200 |
| 10–49 | 42 |
| 50–249 | 10 |
| 250+ | 1 |
Employee coverage: 2900 known, 1025 unknown (73.9%).
Active-company age
What this shows: how long currently active companies have been incorporated.
Top values shown in the chart
| Age band | Companies |
|---|---|
| Under 1 year | 256 |
| 1–3 years | 545 |
| 3–5 years | 402 |
| 5–10 years | 1,605 |
| 10–20 years | 1,026 |
| 20+ years | 91 |
Incorporation-date coverage: 3925 known, 0 unknown (100.0%).
Classification breakdown
What this shows: active companies across the next taxonomy level; direct assignments are labelled separately. The top 20 are shown and remaining values are combined as Other.
Top values shown in the chart
| Classification | Companies |
|---|---|
| Directly assigned to this segment | 3,925 |
International trade
What this shows: active-company participation in imports and exports, followed by the ten HS2 categories involving the most distinct companies.
Top values shown in the chart
| Trade participation | Companies |
|---|---|
| Importer only | 18 |
| Exporter only | 4 |
| Both | 13 |
| Neither | 3,890 |
Top imports HS2 categories
Top values shown in the chart
| HS2 category | Companies | GBP | Available dates |
|---|---|---|---|
| 85 — Electrical machinery and equipment | 18 | £7,856,930,165 | 2016-01-01 – 2026-05-01 |
| 90 — Optical and medical tools and devices | 18 | £1,431,164,506 | 2016-02-01 – 2026-05-01 |
| 73 — Iron or Steel Products | 16 | £1,325,970,778 | 2016-01-01 – 2026-05-01 |
| 84 — Machinery, boilers, and mechanical appliances; parts | 15 | £6,418,192,006 | 2016-02-01 – 2026-05-01 |
| 86 — Railway and tramway vehicles and parts | 12 | £181,213,768 | 2016-02-01 – 2026-05-01 |
| 39 — Plastics and plastic products | 10 | £1,120,434,619 | 2016-04-01 – 2026-05-01 |
| 40 — Rubber and rubber products | 9 | £124,095,527 | 2016-05-01 – 2026-05-01 |
| 94 — Furniture, Lighting, and Prefabricated Buildings | 9 | £802,589,596 | 2017-07-01 – 2026-05-01 |
| 76 — Aluminum and aluminum products | 7 | £259,751,522 | 2022-01-01 – 2026-04-01 |
| 82 — Basic metal tools and utensils | 6 | £50,753,536 | 2018-02-01 – 2025-02-01 |
Top exports HS2 categories
Top values shown in the chart
| HS2 category | Companies | GBP | Available dates |
|---|---|---|---|
| 84 — Machinery, boilers, and mechanical appliances; parts | 14 | £1,971,876,206 | 2016-02-01 – 2026-05-01 |
| 85 — Electrical machinery and equipment | 9 | £1,969,305,656 | 2016-02-01 – 2026-05-01 |
| 86 — Railway and tramway vehicles and parts | 7 | £48,689,474 | 2017-08-01 – 2026-05-01 |
| 90 — Optical and medical tools and devices | 7 | £651,616,827 | 2019-04-01 – 2026-05-01 |
| 73 — Iron or Steel Products | 6 | £429,492,347 | 2016-02-01 – 2026-04-01 |
| 87 — Vehicles, parts, and accessories (not for trains or trams) | 6 | £335,437,572 | 2016-07-01 – 2026-01-01 |
| 82 — Basic metal tools and utensils | 4 | £20,594,441 | 2017-09-01 – 2025-09-01 |
| 39 — Plastics and plastic products | 3 | £349,930,765 | 2017-09-01 – 2025-09-01 |
| 72 — Iron and Steel | 3 | £29,826,405 | 2017-09-01 – 2025-02-01 |
| 83 — Miscellaneous metal items | 3 | £17,686,177 | 2017-12-01 – 2025-09-01 |
Business and digital traits
What this shows: active companies identified with selected ownership, business-model, and online-presence traits.
Values shown in the chart with data coverage
| Trait | Companies | Known | Unknown | Coverage |
|---|---|---|---|---|
| Family business | 196 | 3,697 | 228 | 94.2% |
| Holding company | 0 | 3,697 | 228 | 94.2% |
| Solo founder | 2,362 | 3,697 | 228 | 94.2% |
| Ecommerce | 1 | 17 | 3,908 | 0.4% |
| Website | 22 | 24 | 3,901 | 0.6% |
| 23 | 24 | 3,901 | 0.6% |
Leading active companies
What this shows: the ten active companies with the highest non-missing revenue, with company number used as the deterministic tie-breaker.
Top values shown in the chart
| Company | Revenue |
|---|---|
| Amey Rail Limited | £229,873,000 |
| Jss Rail Limited | £32,474,215 |
| Swietelsky Construction Company Ltd | £25,591,950 |
| 1st Inrail Limited | £24,620,628 |
| Porr Uk Ltd | £15,628,606 |
| Nge Contracting Limited | £2,964,480 |
| Colman Rail Services Limited | £1,675,183 |
| Ares Network Services Ltd | £464,937 |
| Flooring &more Ltd | £185,411 |
| Dawkins Rail And Construction Ltd | £117,305 |
Revenue coverage: 69 known, 3856 unknown (1.8%).
Related classifications
What this shows: sibling classifications ranked by distinct active companies, excluding the current node. The top 20 are shown and remaining values are combined as Other.
Top values shown in the chart
| Classification | Companies |
|---|---|
| Development | 117,527 |
| Domestic | 103,492 |
| Special construction | 68,929 |
| Finishing | 60,823 |
| Electrical installation | 60,734 |
| HVAC | 53,744 |
| Commercial | 45,066 |
| Other installation n.e.c. | 41,251 |
| Joinery | 24,377 |
| Other civil n.e.c. | 19,772 |
| Roofing | 19,044 |
| Painting | 18,362 |
| Floor/wall covering | 12,792 |
| Plastering | 10,210 |
| Glazing | 8,228 |
| Scaffolding | 7,393 |
| Site preparation | 5,793 |
| Machinery installation | 5,584 |
| Electric & telecom | 5,219 |
| Roads | 5,091 |
| Other | 6,333 |
SIC classification
SIC 42120 — Construction of railways and underground railways
Includes
construction of railways and subways
Excludes
installation of lighting and electrical signals, see ##43.21, architectural and engineering activities, see ##71.1, project management for construction, see ##71.1