7. Staff costs
The table below summarizes the number of our employees on 31 December 2018 and 2017:
|
2018 |
2017 |
Number of employees on 31 December |
725 |
600 |
Total |
725 |
600 |
The average number of employees during the years 2018 and 2017 was:
|
Year ended 31 December |
|
|
2018 |
2017 |
Executive officers |
5 |
5 |
Research and development |
553 |
461 |
Corporate and support |
119 |
90 |
Total |
677 |
556 |
Their aggregate remuneration comprised:
|
Year ended 31 December |
|
(thousands of €) |
2018 |
2017 |
Wages and salaries |
(61,619) |
(46,677) |
Social security costs |
(11,003) |
(9,081) |
Retirement benefit costs |
(2,994) |
(2,175) |
Other personnel costs |
(27,375) |
(16,465) |
Total personnel costs |
(102,991) |
(74,398) |
The other personnel costs mainly related to costs for warrants granted of €21.3 million (2017: €11.8 million). For the costs of warrants granted, see note 28.