Report 18/2023 Notification of a transaction pursuant to Art. 19 of MAR

Management Board of STS Holding S.A. _the "Company"_ informs that it hasreceived from a person performing managerial functions and an entityclosely related to a person performing managerial functions anotifications of transactions relating to the Company's financialinstruments. The Management Board of the Company is enclosing the fulltext of the notifications received.

Legal basis: Art. 19. sec. 3 of MAR - information on transactionsperformed by persons performing managerial functions in connection withthe share donation agreement, the Family Foundation in organisation is adonee.