Player · Civil contractor
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Costain
Every fact on this page is free. Exact values, dates, award detail and the procurement route open in the United Kingdom edition — one edition is free with one email. Open your free edition · Open this record in the Atlas
- Kind
- Civil contractor
- Markets
- 1
- Positions held
- 3
UK infrastructure and systems contractor.
- Kind
- Civil contractor
- Headquarters
- United Kingdom
- Ownership
- Listed
- Segments
- Civil works, Electrification, Digital operations
- Present in
- United Kingdom
Footprint
United Kingdom
| Kind | Where | Detail | Sources |
|---|---|---|---|
| Headquarters | England | Maidenhead; SCS JV (34%) on HS2 London tunnels; HS2 tunnel and lineside M&E (≥£400m, from 2025); HS2 high-voltage power JV with Siemens Mobility |
|
Positions held
Phase
- awarded by HS2 Ltd — SCS JV (34%); tunnel and lineside M&E systems (≥, from Q1 2025); HV power supply JV with Siemens Mobility (active · since 2025)
- in JV with Siemens Mobility — HS2 high-voltage power supply systems JV (225 km) (active · since 2024)
- in JV with Skanska — Skanska Costain STRABAG JV (34/34/32) — HS2 London tunnels and approaches (active)
- Contract detail and values (1)In the United Kingdom edition See a fully open example
Sources for these relationships (3)
- ● Costain · Costain wins major HS2 rail systems tunnel and lineside M&E contract (£400m minimum) (published 2024 · checked 2026-09-06)
- ● Costain · Siemens Mobility and Costain JV wins HS2 high-voltage power supply contract (published 2024 · checked 2026-09-06)
- ● Skanska UK · HS2 Main Works (Skanska Costain STRABAG JV, 34/34/32) (checked 2026-09-06)
Competes with
Other civil contractor players present in the same markets.
| Player | HQ | Markets | Positions |
|---|---|---|---|
| Skanska | Sweden | United States, United Kingdom | 18 |
| VINCI | France | European Union, United States, United Kingdom | 16 |
| Dragados | Spain | European Union, United States, United Kingdom, Canada | 11 |
| Balfour Beatty | United Kingdom | United States, United Kingdom | 5 |
| Mace | United Kingdom | United Kingdom | 2 |
| BAM Nuttall | Netherlands | United Kingdom | 1 |
| Kier | United Kingdom | United Kingdom | 1 |
| Laing O'Rourke | United Kingdom | United Kingdom | 1 |
1 source · primary
- ● Costain · Costain wins major HS2 rail systems tunnel and lineside M&E contract (£400m minimum) (published 2024 · checked 2026-09-06)
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Compiled by Watchtower to editorial standards the Managing Partner sets and enforces. Public record only — every datum carries its source.