The firm saw its portion of total spend jump 60% from £337m to £541m in 2016/17.
The uplift saw Costain’s total slice of the spending pie rise from around 5% to 7.4%.
Carillion Construction also retained its second ranking this year achieving a 6% uplift of work.
| Network Rail’s top 20 suppliers |
| Supplier |
Spend 2016/17 |
Spend 2015/16 |
% of total spend |
| Costain |
£541m |
£337m |
7.4% |
| Carillion Construction |
£372m |
£352m |
5.1% |
| Siemens Rail Automation |
£291m |
£306m |
4.0% |
| EDF Energy Customers |
£287m |
£307m |
3.9% |
| ABC Electrification |
£206m |
£113m |
2.8% |
| Colas Rail |
£204m |
£175m |
2.8% |
| Balfour Beatty Rail |
£204m |
£241m |
2.8% |
| Amalgamated Construction |
£184m |
£211m |
2.5% |
| J Murphy & Sons |
£175m |
£175m |
2.4% |
| Amey Rail |
£174m |
£173m |
2.4% |
| Alstom Transport UK |
£143m |
N/A |
1.9% |
| BAM Nuttall |
£133m |
£149m |
1.8% |
| Babcock Rail |
£131m |
£119m |
1.8% |
| Morgan Sindall |
£110m |
£89m |
1.5% |
| AmeyInabensa |
£100m |
N/A |
1.4% |
| Capita Business Services |
£95m |
N/A |
1.3% |
| Geoffrey Osborne |
£90m |
£84m |
1.2% |
| Atkins |
£83m |
£124m |
1.1% |
| VolkerFitzpatrick |
£83m |
£85m |
1.1% |
| Skanska BAM Northern Hub JV |
£79m |
N/A |
1.1% |
ABC Electrification benefitted from the focus on electrification work across the rail network with its invoiced revenue almost doubling to over £200m.
The top 20 suppliers shared out £3.69bn, up from £3.1bn previously, which accounted for half of Network Rail’s supplier spend.
 May 2025.gif)