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, June 11, 2026 – Coteccons Construction Joint Stock Company (HOSE: CTD) has once again been honored among Vietnam’s Top 50 Corporate Sustainability Awards (Top50 CSA) 2026, organized by Nhip Cau Dau Tu Magazine. The year 2026 marks the fifth edition of the award program and the fourth consecutive year that Coteccons has been recognized in this prestigious ranking, maintaining its strong track record across all three Environmental, Social, and Governance (ESG) pillars. Ms. Dinh Thi Hong Tham, Corporate Affairs Director, representing Coteccons, received the award This year, Coteccons was recognized in two key categories: S – Human Capital Strategy for Sustainable Development G – Excellence in Corporate Governance Being acknowledged simultaneously in these two categories reflects a clear evolution in the company’s ESG approach—from strategic commitment to practical execution aligned with international standards, with a strong focus on the two most critical foundations of sustainable development: people and governance. With its multi-layered assessment framework, Top 50 CSA not only recognizes outcomes but also evaluates how effectively enterprises integrate ESG principles into their strategies and operations. As ESG increasingly becomes a market standard, this recognition highlights Coteccons’ capability to transform ESG commitments into sustainable value for communities, long-term benefits for the business, and positive impacts across its ecosystem. Staying the Course on ESG: From Commitment to Execution Through People and Governance In an industry facing ongoing workforce challenges and increasingly stringent operational standards, Coteccons has chosen a foundational approach: transforming both people and systems rather than

Ho Chi Minh City, June 5, 2026 – At the Hubexo Asia Awards 2026, Coteccons Construction Joint Stock Company (HOSE: CTD) was once again recognised among the Top 10 Contractors in Vietnam 2026. This marks the third consecutive year that Coteccons has earned a place on the prestigious list, reaffirming the Company’s industry-leading position and outstanding construction capabilities. Ms. Dinh Thi Hong Tham – Corporate Affairs Director, representing Coteccons, received the Top 10 Contractors in Vietnam 2026 award at the Hubexo Asia Awards Representatives of Coteccons joined other outstanding companies honoured at the Hubexo Asia Awards 2026 The Hubexo Asia Awards is one of Asia’s most prestigious accolades in architecture and construction. Organised by Hubexo, a pioneer in the regional construction ecosystem, since 2005, the awards celebrate organisations that deliver outstanding projects while advancing innovation and sustainable development across key Asian markets, including Hong Kong SAR, Indonesia, Malaysia, the Philippines, Singapore, Thailand, and Vietnam. Notably, the Top 10 Contractors in Vietnam category was only introduced in 2024. Coteccons secured a place in the Top 10 from the inaugural year and has maintained its position for three consecutive years, demonstrating its excellence in construction execution, project management, and leadership within Vietnam’s construction industry. According to Hubexo’s evaluation criteria, the Top 10 Contractors are ranked based on the total value of projects under construction during the most recent calendar year, with additional weighting applied to projects that achieve recognised green building certifications. Projects in the industrial, hospitality, and office sectors are

Coteccons Shareholders’ Day 2026 offers an opportunity for Coteccons’ Leadership to provide updates on business performance, share the Company’s strategic direction, as well as engage directly with shareholders and investors through an open discussion and Q&A session. Coteccons cordially invites shareholders and investors to participate in the program and share valuable insights that contribute to the Company’s sustainable growth and development. Please find detailed information about Shareholders’ Day 2026, taking place on June 15, 2026, below:  Detailed access links for the Coteccons Shareholders’ Day 2026, taking place at 2:00 PM on June 15, 2026, are as follows: 1/ MS Teams – Vietnamese session: Here – English session: Here 2/ YouTube – Vietnamese session: Here – English session: Here 3/ Facebook: Vietnamese session: Here We look forward to your participation in the event!

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