4.3.33Independent Auditor’s Fees and Services

Auditor fees, included in other operating costs, relate to services provided by Deloitte in 2024 and PwC in 2023. The Company‘s external auditor's fees for each respective year are as follows:

in thousands of US$

2024

2023

Audit of financial statements

4,030

3,789

Out of which:

- invoiced by Deloitte Accountants B.V.

2,941

-

- invoiced by Deloitte network firms

1,089

-

- invoiced by PwC Accountants N.V.

-

2,367

- invoiced by PwC network firms

-

1,422

Tax advisory services by Deloitte network firms

17

-

Tax advisory services by PwC network firms

-

34

Other assurance services by Deloitte network firms

308

-

Other assurance services by PwC network firms

-

153

Total

4,355

3,976

Total audit fees increased mainly due to the new scope of the audit of financial statements following the award of new projects for the company and the increased regulatory environment relating to tax and CSRD.

In both 2024 and 2023, the other assurance services were mainly related to the review of the Company sustainability report. No other non-assurance services were conducted.