In 2017, the Group had three customers, all in the Commercial segment, that each accounted for at least 10% of total revenue (2016: three customers, 2015: one customer in Pipeline R&D):
| 2017 | 2016 | 2015 | ||||||||||
| Customer A (Pipeline R&D) | - | - | 11 | % | ||||||||
| Customer B (Commercial) | 20 | % | 20 | % | - | |||||||
| Customer C (Commercial) | 17 | % | 15 | % | - | |||||||
| Customer D (Commercial) | 13 | % | 10 | % | - | |||||||