8. Staff costs
The table below summarizes the number of our employees on 31 December 2019 and 2018:
|
2019 |
2018 |
|---|---|---|
Number of employees on 31 December |
1,003 |
725 |
Total |
1,003 |
725 |
The average number of employees during the years 2019 and 2018 was:
|
Year ended 31 December |
|
|---|---|---|
|
2019 |
2018 |
Executive officers |
5 |
5 |
Research and development |
667 |
553 |
Corporate and support |
193 |
119 |
Total |
865 |
677 |
Their aggregate remuneration comprised:
|
Year ended 31 December |
|
|---|---|---|
(thousands of €) |
2019 |
2018 |
Wages and salaries |
(116,408) |
(61,619) |
Social security costs |
(16,858) |
(11,003) |
Retirement benefit costs |
(4,715) |
(2,994) |
Other personnel costs |
(39,109) |
(27,375) |
Total personnel costs |
(177,090) |
(102,991) |
The other personnel costs mainly related to costs for warrants granted of €32.5 million (2018: €21.3 million). For the costs of warrants granted, see note 28.