21. Related parties

Note 1.2 provides information about the Group’s structure, including details of the subsidiaries and the holding company. The following provides the total amount of transactions that have been entered into with related parties for the relevant financial period.

The Company engages GrayMatters Consulting BV, a management entity for the purpose of providing key management services to the Company. This management entity is considered a related party, as it provides key management services and exercises key management functions.

The aggregate amount of expense recognized in the unaudited condensed consolidated interim financial statements related to this related party was €0.3 million and €0.4 million in the six months ended June 30, 2026 and 2025, respectively.

The outstanding balances payable to key management personnel, or entities which they control, as per June 30, 2026 and December 31, 2025 were €1.0 million and €1.6 million, respectively.