Accredited Body: DQS GmbH, August-Schanz-Straße 21, 60433 Frankfurt am Main, Germany Administrative Office: DQS Holding GmbH, Konrad-Adenauer-Allee 8-10, 61118 Bad Vilbel, Germany 1 / 2

CERTIFICATE

This is to certify that

SUBOR BORU Sanayi ve Ticaret A.S. Merkez

Acıbadem Mahallesi Sokullu Sokak no: 12 34718 İstanbul, Kadıköy Turkey with the organizational units/sites as listed in the annex

has implemented and maintains an Information Security Management System.

Scope: Glass Fiber Reinforced Plastic Pipe systems and logistics, storage, accounting, finance, human resources, sales, marketing quality management and information processing, activities related to these operations with customs and foreign trade activities; logistics, warehousing, accouting, finance and information technologies’ assests and information security activities to keep information assets. Statement of applicability: BGYS Uygulanabilirlik Bildirgesi, version 2020-05-26

Through an audit, documented in a report, it was verified that the management system fulfills the requirements of the following standard:

ISO / IEC 27001 : 2013 Equivalent to: DIN EN ISO / IEC 27001 : 2017

Certificate registration no.

Valid from

Valid until

Date of certification

067680 ISMS17

2021-01-13

2024-01-12

2021-01-13

DQS GmbH

Markus Bleher Managing Director

Annex to certificate Registration No. 067680 ISMS17 SUBOR BORU Sanayi ve Ticaret A.S. Merkez

Acıbadem Mahallesi Sokullu Sokak no: 12 34718 İstanbul, Kadıköy Turkey

This annex (edition: 2021-01-13) is only valid in connection with the above-mentioned certificate. 2 / 2

Location

067681 SUBOR BORU Sanayi ve Ticaret A.S. Factory Ahmetler Mahallesi Şehit Mustafa Geyve Caddesi No: 45 54300 Karapürcek, Sakarya Turkey