7. Staff costs

7. Staff costs

The table below summarizes the number of our employees on 31 December 2017 and 2016:

 

2017

2016

Number of employees on 31 December

600

508

Total

600

508

The average number of employees during the years 2017 and 2016 was:

 

Year ended 31 December

 

2017

2016

Executive officers

5

4

Research and development

461

385

Corporate and support

90

79

Total

556

468

Their aggregate remuneration comprised:

 

Year ended 31 December

(thousands of €)

2017

2016

Wages and salaries

(46,677)

(34,857)

Social security costs

(9,081)

(7,328)

Pension costs

(2,175)

(1,728)

Other personnel costs

(16,465)

(9,617)

Total personnel costs

(74,398)

(53,530)

The other personnel costs mainly related to costs for warrants granted of €11.8 million (2016: €6.6 million). For the costs of warrants granted, see note 29.