DOĞAN ŞİRKETLER GRUBU HOLDİNG A.Ş. Özel Durum Açıklaması (Genel) 20 Nisan 2026

Our 75% subsidiary Gümüştaş Mining is pleased to announce the completion of the updated Mineral Resource Estimate for its 100% owned Bolkar 1 and Bolkar 2 polymetallic projects, located in the Bolkar region of Niğde, Türkiye. The report has been prepared in compliance with the National Resources and Reserves Reporting Committee (UMREK) Code. 

Key highlights from the resource estimate include:

• Total Mineral Resources: A total of 12.7 Million Tonnes (Measured + Indicated +  Inferred) has been identified across the Bolkar 1 and Bolkar 2 assets. 
• Average Grades: The  combined resource averages 23.0% ZnEq, including 4.3% Zn, 2.5% Pb,  1.2 g/t Au, and 97.1 g/t Ag.
• Compliance & Methodology: The report was compiled under the direction of Mr. Philippe A.  Baudry of SLR, a Professional Member of YERMAM and a "Competent  Person" (CP) as defined by the UMREK Code. 

These results confirm the Bolkar project as a high-grade polymetallic asset and provide a robust foundation for our future production and development strategy. As disclosed to the public on March 3, 2026, the annual capital expenditure (CAPEX) guidance for our subsidiary, Gümüştaş Mining, has been increased to USD 70 million for 2026. 

Respectfully announced to the public and our shareholders.