COTECCONS PROVIDES UPDATE ON CHANGES IN MAJOR SHAREHOLDER OWNERSHIP

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 sustainable development of the community and the economy.

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Ho Chi Minh City, July 8, 2026 – Within the framework of Solar & Storage Live Vietnam 2026, Ms. Nguyen Trinh Thuy Trang, Deputy CEO of Coteccons, participated in the panel discussion titled “Not Green, Not Filled: The New Rules of Vietnam’s Real Estate Market.” During the session, the Coteccons representative shared perspectives on the role of general contractors in delivering green buildings, narrowing the gap between design and operations, and fostering a proactive mindset in response to increasingly stringent sustainability requirements and the Net Zero agenda. Green buildings must be planned from the very beginning According to Ms. Nguyen Trinh Thuy Trang, the key to achieving genuine green building standards does not lie in the construction phase itself, but rather in the earliest stages of project conception. As a general contractor, Coteccons adopts the Design & Build and Early Involvement Contractor models, working alongside developers from the planning stage to optimize design solutions, material selection, MEP systems, construction methods, and long-term operational strategies. “If the goal is to develop a green building, planning must begin from the outset to avoid having to make changes during construction. Otherwise, the costs can become significantly higher.” Ms. Nguyen Trinh Thuy Trang, Deputy CEO of Coteccons, speaking at the panel discussion “Not Green, Not Filled: The New Rules of Vietnam’s Real Estate Market” Early engagement in the design process not only helps optimize investment value through value engineering but also enables all stakeholders to establish a long-term development strategy for the project.

On July 6, 2026, Coteccons was once again recognized as a company meeting the 2026 Information Disclosure Standards under the IR Awards, marking the sixth consecutive year that the Company has fully complied with the stringent information disclosure requirements of Vietnam’s stock market. This achievement reaffirms Coteccons’ steadfast commitment to maintaining high standards of corporate governance, strengthening Investor Relations (IR), and building long-term trust with shareholders, business partners, and the investment community. The IR Awards, organized annually since 2011 by Vietstock, in collaboration with the Vietnam Association of Financial Executives (VAFE) and FiLi – Finance and Life e-Magazine, honor listed companies that meet the market’s information disclosure standards. The evaluation is conducted through a comprehensive and objective survey based on prevailing legal regulations on information disclosure, while also serving as the foundation for identifying companies with outstanding Investor Relations (IR) practices. The 2026 IR Awards Survey assessed 685 listed companies on the HOSE and HNX exchanges during the period from May 1, 2025, to April 30, 2026. The results showed that only 459 companies, representing 67% of the total, fully satisfied the evaluation criteria and were recognized as meeting the 2026 Information Disclosure Standards. This year’s survey applied more stringent requirements, particularly regarding bilingual information disclosure under Circular No. 68/2024/TT-BTC, which amends and supplements several provisions of Circular No. 96/2020/TT-BTC, reflecting the Vietnamese capital market’s continuous efforts to enhance transparency standards. Maintaining this recognition for six consecutive years demonstrates Coteccons’ consistent commitment to building a transparent governance system, ensuring

Hanoi, June 26, 2026 – At the Vietnam Business Forum 2026, themed “Innovation for Growth, Green for Sustainability,” Coteccons and Unicons were honored in the Top 10 Vietnam Green ESG Companies 2026 – Construction industry (ESG10). This marks the second consecutive year that both companies have been included in the prestigious ranking, reaffirming their unwavering commitment to ESG practices and demonstrating that sustainable development has been consistently embedded throughout the Coteccons ecosystem. Mr. Nguyen Viet Thang, Corporate Governance Manager, received the award on behalf of Coteccons Representatives of Coteccons together with other distinguished enterprises honored at the award ceremony The Top 10 Vietnam Green ESG Companies 2026 (ESG 10) program is jointly researched and published annually by Viet Research and Finance & Investment Newspaper under the Ministry of Finance. The program recognizes pioneering enterprises that effectively integrate Environmental, Social and Governance (ESG) principles into their business strategies, contributing to the promotion of responsible growth and enhancing the long-term competitiveness of Vietnamese businesses in the global economy. The ESG10 framework is developed based on internationally recognized ESG assessment methodologies, including the Dow Jones Sustainability Index (DJSI), MSCI ESG Ratings, Sustainalytics ESG Risk Ratings, Bloomberg ESG Data Service, and Corporate Knights Global 100, while being adapted to Vietnam’s business environment. Companies are comprehensively evaluated based on sustainable business performance, ESG strategies and commitments, environmental practices, social responsibility, and corporate governance. This recognition carries even greater significance as Vietnam accelerates its green growth agenda toward achieving net-zero emissions by 2050, while ESG standards

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