Ho Chi Minh City, May 12, 2026 – Coteccons Construction Joint Stock Company (HoSE: CTD) hereby provides an update on the ownership of the Korea Investment Management (KIM) group, which currently holds a 4.13% stake in the Company, based on the latest disclosed transaction reports in accordance with regulatory requirements. This marks the eighth ownership update since KIM became a major shareholder of Coteccons in June 2024, including four increases and four decreases in its ownership ratio. Over the years, Coteccons has received strong support from both domestic and international institutional investors throughout its restructuring journey, as well as in enhancing operational efficiency and strengthening corporate governance. The Company remains on track to achieve its 2026 business plan, recording positive year-on-year growth in both revenue and profit, with approximately 80% of its annual revenue target and 92% of its profit after tax target already fulfilled. At the same time, Coteccons continues to receive favorable assessments from reputable financial institutions and securities firms, and has been consistently included in the Vietnam Sustainability Index (VNSI) by HoSE for multiple consecutive years. About Coteccons Coteccons is a Vietnam’s leading construction company, with more than two decades of experience in delivering large-scale and complex projects. With its aspiration to become an Industry Leader, Coteccons aims to lead not only through business performance but also by elevating industry standards and promoting sustainable development. The Company is committed to creating safer, more comfortable, and more meaningful living and working spaces, thereby contributing positively to the