STS Holding S.A.

Director's Dealing • Aug 25, 2023

Notifications of transactions pursuant to Art. 19of MAR

The Management Board of STS Holding S.A. (the"Company") informs that on 24 August 2023 it has received notificationsdated 24 August 2023 of transactions relating to the Company's financialinstruments from persons performing managerial functions, i.e. (i) MJFoundation Fundacja Rodzinna as an entity closely related to a personperforming managerial functions Mr. Mateusz Juroszek, (ii)FundacjaZbigniewa Juroszka Fundacja Rodzinnaas anentity closely related to a person performing managerial functions Mr.Zbigniew Juroszek, (iii) Fundacja Marcina Walczysko Fundacja Rodzinna asan entity closely related to a person performing managerial functionsMr. Marcin Walczysko, (iv) Fundacja Zdzisława Kostrubały FundacjaRodzinna as an entity closely related to a person performing managerialfunctions Mr. Zdzisław Kostrubała.

Attached, the Company's Management Board provides thefull text of the received notices.Legalbasis: Art. 19 ust. 1 MAR - Information on transactions performed bypersons performing managerial functions and closely related persons