Costain Ltd

Unknown

Company number00610201

Company typeUnknown

JurisdictionUnknown

IncorporatedInvalid Date

Concentration risk

Buyer concentrationHigh risk

77%

Top 3 buyers account for 77% of total contract value

Sector concentrationHigh risk

100%

Top 2 sectors represent 100% of portfolio

Single buyer dependencyHigh risk

41%

Largest buyer (National Highways) represents 41% of total value

Route to marketHigh risk

100%

100% of contract value via direct award

Contract renewal windowHigh risk

11 in 24mo

11 contracts due for renewal in next 24 months

New buyer acquisitionLow risk

6 in 24mo

6 new buying relationships in last 24 months

Buyer breakdown41 buyers

Total buyers41

Top 5 concentration92%

Returning buyers35

New buyers (24 mo)6

Top buyers by contract value

National Highways

£1.9bn43 contracts

Sellafield LtdNew

£982m1 contract

Transport for London

£701m3 contracts

HS2

£409m2 contracts

National Highways Limited

Sector breakdown1 sectors

100%

Other

Stable

Contract value£4.6bn

Contracts131

Buyers41

Contract patterns

Avg contract value£35m

Avg duration2yr 1mo

Renewal rate46%

Total contracts131

Awards by year

2022£108m

2023£26m

2024£6m

2025£1.5bn

2026£824m

Buyer	Sector	Contracts	Total value	% of portfolio	Latest award
National Highways	Other	43	£1.9bn	41.0%	2025-10-22
Sellafield LtdNew	Other	1	£982m	21.1%	2025-10-10
Transport for London	Other	3	£701m	15.1%	2026-04-22
HS2	Other	2	£409m	8.8%	2025-01-06
National Highways Limited	Other	14	£297m	6.4%	2026-05-13
Lancashire County Council	Other	3	£210m	4.5%	2022-01-12
Nuclear Restoration Services LtdNew	Other	2	£72m	1.5%	2026-02-09
Espo	Other	7	£30m	0.6%	2021-10-25
DfTc - Department for Transport	Other	10	£24m	0.5%	2025-04-15
Crown Commercial Service	Other	3	£7m	0.1%	2023-03-01
Department for Energy Security & Net ZeroNew	Other	1	£6m	0.1%	2024-12-09
Cabinet Office	Other	1	£3m	0.1%	2020-12-29
Ministry of Defence	Other	1	£2m	0.0%	2021-03-18
Highways Agency	Other	2	£511k	0.0%	2016-09-29
Department for Business, Energy & Industrial Strategy	Other	1	£327k	0.0%	2022-09-05
The Water Services Regulation Authority	Other	3	£318k	0.0%	2021-06-28
Swindon Borough Council	Other	2	£188k	0.0%	2025-01-24
LondonWaste Limited	Other	1	£150k	0.0%	2016-09-26
Civil Aviation Authority	Other	3	£136k	0.0%	2021-03-06
EAST WEST RAILWAY COMPANY LIMITED	Other	1	£95k	0.0%	2021-10-25
Office of Rail and Road	Other	1	£60k	0.0%	2023-12-11
Community Health Partnerships Limited	Other	1	£36k	0.0%	2022-03-07
Department for Transport	Other	2	£11k	0.0%	2020-04-30
Port of DoverNew	Other	1	£0k	0.0%	2026-05-04
Wirral CouncilNew	Other	2	£0k	0.0%	2026-03-19
NATIONAL GRID ELECTRICITY TRANSMISSION PLCNew	Other	2	£0k	0.0%	2026-01-29
West Yorkshire Combined Authority	Other	1	£0k	0.0%	2017-07-14
MAG AIRPORT LIMITED	Other	1	£0k	0.0%
DESNZ & DSIT Group Commercial	Other	2	£0k	0.0%
High Speed Two (HS2) Ltd	Other	1	£0k	0.0%
Network Rail Infrastructure Ltd	Other	1	£0k	0.0%
Southern Water Services Ltd.	Other	1	£0k	0.0%
NORTHUMBRIAN WATER LIMITED	Other	1	£0k	0.0%
Magnox Limited	Other	1	£0k	0.0%
NATIONAL GRID UK LIMITED	Other	2	£0k	0.0%
Nuclear Restoration Services Limited	Other	2	£0k	0.0%
UNITED UTILITIES WATER LIMITED	Other	1	£0k	0.0%
THAMES WATER UTILITIES LIMITED	Other	1	£0k	0.0%
The Department for Business, Energy and Industrial Strategy	Other	1	£0k	0.0%
Sellafield Limited	Other	1	£0k	0.0%
City of Bradford Metropolitan District Council	Other	1	£0k	0.0%