ty le keo nha cai 5 COTECCONS ANNOUNCES DECISION TO PARTICIPATE IN GIA BINH INTERNATIONAL AIRPORT PROJECT AND UPDATES PUBLIC BOND ISSUANCE DOCUMENTATION FOR 2025

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COTECCONS ANNOUNCES INTENTION TO PARTICIPATE IN GIA BINH INTERNATIONAL AIRPORT PROJECT AND UPDATES PUBLIC BOND ISSUANCE DOCUMENTATION FOR 2025

Ho Chi Minh City, December 5, 2025 – Coteccons Construction Joint Stock Company (HOSE: CTD) has announced three significant resolutions related to its strategy to participate in a key national infrastructure project and ty le keo nha cai 5 ongoing process of finalizing documentation for its 2025 public bond issuance.

Coteccons Approved to Enter into Contracts with Consortium for Gia Binh International Airport Project

ty le keo nha cai 5 Board of Directors of Coteccons issued Resolution No. 28A/2025/NQ-HĐQT dated December 5, 2025, approving ty le keo nha cai 5 Company’s intention to sign contracts with ty le keo nha cai 5 Consortium of General Contractors for ty le keo nha cai 5 execution of critical packages and components of ty le keo nha cai 5 Gia Binh International Airport Project.

Gia Binh International Airport is a national priority project, expected to become one of Vietnam’s largest airports, designed to meet ICAO’s 4F standards. Given its complexity and scale, ty le keo nha cai 5 project requires contractors with extensive experience, deep knowledge of international standards, and proven capability in delivering mega projects in Vietnam.

Coteccons Updates Progress on Adjusting 2025 Public Bond Offering Documentation

ty le keo nha cai 5 Board of Directors also approved Resolutions No. 26 and 27 dated December 5, 2025, concerning adjustments to certain details in ty le keo nha cai 5 documentation for ty le keo nha cai 5 2025 public bond offering.

Previously, Coteccons submitted its bond issuance dossier to ty le keo nha cai 5 State Securities Commission and disclosed information on October 13, 2025, in compliance with regulations. ty le keo nha cai 5 Company is currently refining, adjusting, and supplementing information as guided by ty le keo nha cai 5 regulatory authority.

These adjustments aim to ensure ty le keo nha cai 5 issuance documentation is complete, transparent, compliant with risk management standards, and aligned with prevailing legal requirements, thereby facilitating ty le keo nha cai 5 upcoming public offering process.

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Ho Chi Minh City, January 30, 2026 – Coteccons Construction Joint Stock Company (HOSE: CTD) announces its business results for ty le keo nha cai 5 second quarter of fiscal year 2026 (accounting period from October 1, 2025 to December 31, 2025), continuing to deliver strong growth in both revenue and profit. ty le keo nha cai 5 consolidated results for Q2 and ty le keo nha cai 5 first six months of FY2026 are as follows: Net revenue for Q2 reached VND 10,007 billion, an increase of ~45% YoY (vs. VND 6,886 billion). Six-month accumulated revenue reached VND 17,459 billion, up ~50% (vs. VND 11,645 billion), completing ~58% of ty le keo nha cai 5 FY2026 Annual Operating Plan (AOP FY26). Gross profit for Q2 reached VND 371 billion, ty le keo nha cai 5 highest level over ty le keo nha cai 5 past 28 quarters, representing an ~84% increase YoY (vs. VND 202 billion). Gross profit for ty le keo nha cai 5 first half of ty le keo nha cai 5 fiscal year reached VND 693 billion, up ~72% (vs. VND 403 billion). Net profit after tax for Q2 reached VND 228 billion, up ~115% YoY (vs. VND 106 billion). Six‑month accumulated net profit reached VND 523 billion, an increase of ~165% YoY (vs. VND 198 billion), achieving ~75% of AOP FY26. Net profit margin for Q2 reached 2.28% (+0.73 percentage points YoY); six‑month net profit margin reached 2.99% (+1.30 percentage points YoY). These positive results stem from Coteccons’ consistent execution of ty le keo nha cai 5 six strategic priorities set at ty le keo nha cai 5 beginning of ty le keo nha cai 5 fiscal year, notably Strategic Pillar No. 4: Effectively improve profit margin through cost optimization and revenue scaling. Within this pillar, ty le keo nha cai 5 Supply Chain

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Ho Chi Minh City, December 19, 2025 – Coteccons Construction Joint Stock Company (HOSE: CTD) has officially approved ty le keo nha cai 5 acquisition of 100% equity in GEO Foundations Vietnam (formerly Bauer Vietnam), a company with 100% foreign investment in Vietnam by BAUER SPEZIALTIEFBAU GMBH (Germany), one of ty le keo nha cai 5 global pioneers in specialized foundation engineering. This acquisition marks a strategic move for Coteccons to strengthen its core technical capabilities, expand its BuildTech ecosystem, and accelerate its growth strategy in anticipation of ty le keo nha cai 5 public investment cycle for 2026–2030. BAUER, headquartered in Schrobenhausen (Germany), is a world leader in specialized foundation engineering and underground construction. BAUER SPEZIALTIEFBAU GMBH boasts over 50 years of deep expertise, having executed thousands of complex projects worldwide and set high technical standards for modern foundation construction. GEO Foundations Vietnam inherits ty le keo nha cai 5 full technological platform, processes, and quality standards from its parent company in Germany. Established in 2006, ty le keo nha cai 5 company has achieved significant milestones by participating in large-scale projects across various sectors, including oil refineries, shopping centers, high-rise residential buildings, commercial-service complexes, key infrastructure, and government projects. Not only has GEO Foundations Vietnam been entrusted with some of ty le keo nha cai 5 most prestigious projects in Vietnam, but it also strictly adheres to BAUER’s international technical standards in every project. With a team of experienced engineers and managers both locally and internationally, ty le keo nha cai 5 company is committed to delivering superior construction quality and services that meet ty le keo nha cai 5 most demanding client requirements. GEO Foundations Vietnam has participated in approximately 60 infrastructure, industrial, and high-rise projects,

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