BOD’s decision regarding acquisition of Bauer VN & selecting E&Y for auditing FY2026 financial statements

‌CONG TY CCt PHiYN BY DQG CONG HOA HOI CHiJ NGHIA VIET NAM

COTECCONS Doc leap - Ttr do - Hanh phfic

COTECCONS CONSTRUCTION THE SOCIALIST REPUBLIC OF VIETNAM

JOINT STOCK COMPANY Independence - Freedom - Happiness

So/ No. 0if2025/CV-CTD TP. Ho Chi Minh, ngây 30 thâng 12 nâm 2025 Ho 6'/ii Minh cin, December 30, 20-*5

CONG BE TTfONG TIN BAT THIS G

EXTRAORDINARY INFORMATION DISCLOSURE

Kinh gñi/ To: - Uy Ban Ch rug Khofin nha nwé'c/ State Securities Commission of Vietnam

- SP Giao dicli Ch rug lthoan Viet Nam/ Ser Giao dich Chirng khoén tlianh pho Ho Chi Minh/ Vietnam Exchange/ Hochiminh Stoch Exchange

1. Ten to chic/Name or organization: Cfing ty Co phan Xñy Dirng Coteccons/ Coteccons Construction Joint Stock Company

   Ma chung khoan/ Stock code: CTD

   Dla chi/Address.' 236/6 Dign Bién Phii, P. Gia Dlnh, TP. HCM

   Di n thoai lien h / Tel.: (84) (28) 35142255 - Fax: (84) (28) 35142277

   - E-mai1: bodsecretary@coteccons.vn

2. N{oi dung thñng tin cñng bo/ Contents of disclosure:

   Ngh| quyét H i dong quan tri so 29/2025fNQ-HDQT ngñy 30/12/2025 ve viec phé duyet chu birong mua 100% von gop ciia Cñng ty TNHH GEO Foundations Viet Nam (Ten cñ: Cñng ty TNHH Bauer Viet Nam).

   Resolution of the Board ofDirectors No. 29/2025fNQ-HDQT dated 30 December 2025 on the approval of the policy to acquire 100% of the coiiti'ibuted capital of GEO Foundations Vietiiam Company Limited (former name: Bauer Vietnam Company Limited).

   Nghi quyet Hoi dong quan tr| so 30/2025/NQ-HDQT ngay 30/12/2025 vé viec phé duyet don v| kiem toan Bao cao tai chinh cho nam tai chinh 2026 ciia Cñng ty Co phan Xay ding Coteccons.

   
   
   
   
   
   

   Resolution of the Board ofDirectors No. 30/2025fNQ-HDQT dated 30 December 2025 on the approval of the auditing finn for the financial statements for the fiscal year 2026 of Coteccons Construction Joint Stock Company.

3. Thong tin ndy dii duqc cñng bo trén trang thñng tin dien tir cña cñng ty vao ngay 30/12/2025 tai duong d : https://coteccons.vn/investor-relations-vn// This information was published on the company's website on December 30, 2025, as in the link https://www.coteccons.vn/en/investor-relations/.

Chung tñi xin cam két cac thñng tin cñng bo trén dfiy la dung sq th"at va hoan toan chiu trach nhiem triroc phap lu{at ve n i dung cac thong tin da cñng bo/ We hereby certify that the information provided is true and correct and we bear the full responsibility to the law.

n to chirc epresentative

cñng bo thñng tin zeB BPliigi ormatioii disc losiire

DINH THI HONG THAM

Tizi free dlitli kéuu' Atiiir/ierl dncuitiera:

- Nhic myc 2/ As item 2

1

‌CONG TY CO PHAN BY DQG COTECCONS

Sñ/No. : 29/2025/NQ-HDQT

CONG HOA HOI CHU NGHfA VI SET NAM

Doc lfip - T* do - Hanh phlic

SOCL4LIST REPUBLIC OF VIETNAM

In Jepen Jence - Freedom - Happiness

Tp.Ho Chi Minh, ngâyW. thang 42 nâm 2025 Ho Chi Minh City, k£ .be.. £.0.., 2025

NGH] QUYFT

HQI DONG QUAN TRI. CUA CONG TY CO PHN BY DQG COTECCONS

BOARD OF DIRECTOR OF COTECCOHS COHSTR UCTION POINT STOCK COMPANY

• Cân ct vâo Ltipt Doanh Nghiép st 59/20207QHI4,-Pursuant to the Lasv on Enterprises No. 59/2020/QIII4;

• Cân ct Diéii L I: cña Câng ty CA phân Xây dimg Coteccons,

Pursuant to the Charter' of Coteccons Construction Joint Stock Company;

Chn ci'i Bién ban ting h9p kién H@i ding qiiân v i st I9/BBH-HD QT ngây b./ 2025 cña Câng iy Câ

phân Xây dyng Coteccons.

In pursuant to Minutes of Written opinion collection of the Board of Director s No. I 97BBH-HDQT dafed

.$0../.M2025 of Coteccons Construction Joint Stock Company.

C0NGl

"COTECC

qto3^43

1. Thñng tin Cñng ty diroc mua lai

   Infornuuion on the ACQuired Co Pany

   1. Ten Cfing ty: Cñng ty TNHH GEO Foundations Viet Nam (Ten cñ: Cfing ty TNHH Bauer Viet Nam) Company name.-GEO Foundation Vietnam Company Limited (Former name.' Bauer Kfemam Company Limfted).

   2. Mii sñ thué: 0304742518

      Tax code. 0304742518

   3. Linh vqc kinh doanh chinh: Thi cñng nén mfing.

      Main business activities. Foundation construction works.

2. Muc dich mua lai

Mo r9ng host ding cua Coteccons trong linli vyc thi cfing, da dang hfia hoat dong kinh doanh cot Iñi, nhñm tiing thém nguon doanh thu cho todn tjp doan va nang cao nhñn dijn thirong higu cña Coteccons trén thi trtiñng.

Expanding Coteccons' operational arms into foundation engineering, creating synergistic diversification to enhance the Group's revenue, strengthen overall execution capabilities, and elevate Coteccons ' brandpositioning.

1

Ngi dung d{ich sang tiéng Anh chi sir dung cho mqc dich thñng tin. Trong truhng h9p cb sq mfiu thufin giiia noi dung tiéng Vigt van9i dung tiéng Anh, n9i dung tiéng Viet sé dugc uu tién âp ding.

The English translation isfor informational purposes only. In case of any discrepancy beñveen the Vietnamese and English version, the Vietnamese version shall prevail.

*Luu j: Thoi diem Cñng ty GEO Foundations tro thanh Cñng ty Con cua Coteccons la thñi diem cac bén hoñn tat giao d|ch, cdc dieu kien tién quyet dirqc hoñn thñnh vñ cac bén hoan tat cac nghia •u aria minh theo cac hqp dong, giao d|ch duqc ki két.

*Note: The point at which GEO Foundations becomes a subsidiary o/ Coteccons is when all parties have concluded the h-ansaction, satisJie‹:1 the prerequisite conditions, andfulfilled thefr contractual obligations as outlined in the signed contracts, agreements.

Dieu 2. Uy quyen Arff€fe 2. Autltorization

Giao va uy quyen cho Ong Bolat Duisenov - Chñ t|ch Hoi dong quñn trt kj ket cac Hpp dong, Viin ban va thqc hien cac thu Eye can thiét nhñm hoan tat giao d'ich quy dinh tai Dien 1 Nghi quyét nay, dong thdi da:qQ quyén uy quyen lai cho nhñn vién cua Cong ty de there hijn cac cong viec néu trén.

Authorize Mr. Bolat Duisenov - Chairman of the Board of Directors to execute all contracts and documents and carry out the necessaiy procedures to complete the transaction stipulated in Article 1 o/ this Resolution, and to/urther delegate such authority to employees o/the Company%r theperformance o/ the aforesaid tasks.

Dieu 3. Hiéu lore thi hanh

Ngh| Quyét nñy co hieu ldc ké tit ngñy ky.

This Resolution takes effectfroiii the signing ‹:late

Cac thanh vién Hoi dong Quñn tr|, Ban Tñng Giam Doc, cac thanh vién/phfing/ban cfi lién quan c Cñng ty va ca nhan néu trén chiu trdch nhiem thqc hien Ngh'i Quyét nñy.

The members of the Boated of Directors, the Board of Management, relevant meziibers7depariments of the Company and the mentioned-above individual shall be responsible to implement this Resolution.

Nat rift)n/ Copy and seitd to:

• Nhu Dieu 3/ As article 3,'

• Luu tit Cñng Ty/ Kept at the Company

THAY T HOI DONG QUAN TRI.

CO PHAN XY 0DkG

C0TECC0N5

BOLAT DUISENOV

2

N9i dung d!ch sang tiéng Anh chi sir dqng cho mqc dlch thong tin. Trong triidng hpp ch sq mñu thuñn giiia noi dung tiéng Viet vân§i dung tiéng Anh, n6i dung tiéng Viet se duqc uu tién âp dqng.

The English translation isfor informational ptirposes only. In case of any discrepancy beHveen the Vietnamese and English version, the Vietnamese version shallprevail.

‌CONG TY CA PEAN

BY D{fNG COTECCONS

cozEccous cous+nvc+ioo

SolNo. : 30/2025/NQ-HDQT

CONG I-fOA Xii HOI CH 1 NGI-HA VIET NAM

Doc lap - Tu' do - Hanh phuc

SOCZdLIST REPf/BLIC OF VIETHAM

ImteyenJence - Freeitom - Hnypiness

Tp.Hâ Chi Minh, ngâ ... things.. nâm 2025 Ho Chi Minh City, M.H.d..., 2025

NGHI QUYET

HQI DONG QUAN TRI. CUA CONG TY CO PHAN BY DQG COTECCONS

RESOLUTION

BOARD OFDIRT 'O OF COTECCOHS COHSTR UCTIOH JOINT STOCK COMPAW

• Cdn cir vbo Lull Doanh Nghipp so 59/2020/QHI4,' Pui'suant to fee Law on Enterprises No. 59/2020/QH14,-

• Cân cñDiéii Le ciia Câng ty CAphdn Xây dirng Cofeccons,-

  Pia'stiant to ltte Chpi'ler of Coteccons Construction Joint Stock Company;

• Cân cir Nghi qtiyet Dqi hgi ding c@ dâng ffiiztzitg iiién ed 07/2025/NQ-DHCD ngây 20/10/2025;

  Purstiant to the Resolution of the Annual General Meeting of Shai-eholders No. 07/2025/NQ-DHCD dated October- 20', 2025;

• Cân cir Bién bân ting hop j kien Hpi ding qiiân tri st I97BBH-HDQT ngây /(E2025 ciia Câng fy CA phdn Xây d rrig Coteccons.

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C0Tfl

In pta-suant to Minutes of Wi-ilten opinion collection of the Board of Dii-ectors No. 19/BBH-HDQT dated I)..fM/2025 of Coteccons Construclion Joint Stock Company.

QUYET DjNH/ DECIDES:

Dieu 1. Phé duyet dirn vi kiem todn Bfio cao t3i ehinh cho niim tñi chinh 2026 ciia Cñng ty Co pha

Xay d*ng Coteccons ("Coteccons")

Article 1. To approve the selection of f/ie niidi/ing firm for ltte fiscal year 2026 of Coteccons Costi-uctioii JSP ("Coteccons")

1. Cñn cir theo Nghi quyet Dqi h9i ding co dñng thuñng nién nam tai chinh 2025 so 07/2025/NQ-DHCD ngay 20/10/2025 va de nghJ ciia Ban Kiem soat, Hoi ding Quñn tri thfing qua viec lira chpn Cñng ty TNHH Ernst & Young Vijt Nam (E&Y) lñm dat vi kiem toan Béo cao tñi chinli cho nâm tai chinh 2026 cho Coteccons.

   Pursuant io The Resolution oflhe Annual General Meeting ofShai•eholdei sfor the Fiscal Year 2024, No. 07720257DHCD Jated 2071072025, and the recoiitntendation ofBoard o/SiipervfSors, the Board o/Directors has approveJ the selectioit ofEi-nst & Young Vietnaiit Limited (E&Y) as the audfting finnfor Coteccons'financial stateiitents for the Fiscal Year 2026.

2. Giao cho Ban Tong Giam doc trien khai ky ket hpp ding vñi Cong ty kiem toan voi E&Y, bao cao két qua kiem toan h-uñc H i dong quñn tr| vâ Dai h9i dong co dâng theo dung quy dinh.

The Board ofManagewent is authorized to sign the contract with E& Yaiidresponsible/or ref›orting the auditecl results to the Board of Direcfoi-s and General Meeting of Shareholder-s in accoi-dance with legislations and regulations.

Dieu 2. Hien lire thi hñnh

Article 2. Effectivenesc

Nghi Quyet nay co hieu lqc ke tir ngay ky.

This Resolution takes effectfrom the signing date

1

N8i dung djch sang tieng Anh chl sir dung cho inpc dlcli thfing tin. Trong tryñng h9p cb str inau thuan giiia n9i dung tieng Viet vâ not dung tieng Anh, ngi dung tiéng Viet sé duqc uu tien ép dqng.

The English translation isfor- infoi-mational pwposes only. In case of any discrepancy betweeit the Vietnamese and English vei'sion. the Vietnaiiiese version shall pi-evail.

Cac tliñnli vién Hoi ding Quan fi-|, Ban Tong Giéin Doc, cac thanh vién/plifing/ban co lien quan cua Cong ty va ca nhan néu trén cliiu trach nhiem tlitrc hien Nghi Quyét my.

The itientbei-s o/ the BoarJ of Directors, the Board ofMaitagentent, i•elevaii/ itteiitbers/departiitents of the Coiiipany anJ the iiientioned-above individual shall be responsible fo iitipleiiient this Lesolillfott.

- Nhir Dieu 2/ As article 2,'

- Luu t91 Cñng Ty/ Kept at the Company

THAY MAT HOI DQNG QUAN TRI,

A ¥$Y0UNG

° C0TECC0N8

AT DUISENOV

2

Noi dung d|ch sang tieng Anh chI sit dpng cho muc dlch th8ng tin. Trong trii6ng hqp c6 sq mñu thiiñn giCia n9i dung tieng Vijt vñ npi dung tieng Anh, n9i dung tiéng Viét st diiqc tru tién âp dqng.

The English frons/ofioii is%r informational piiI'poses only. In case of any disci'epancy behveen the Vietnamese and English vei'sion, the Vietnamese vei-sion shallprevail.