Change in certificate of business registration – 31st amendment

‌CONG TY CO PM BY DJfNG

COTECCONS

So/ No.: 4264/2026/CV-CTD

CONG HOA HOI CHiJ NGHIA VIET NAM

Doc leap - Tir do - H9nh phfic

Independence - Freedom - I-happiness

TP. HP Chi Minh, ngây 26 thâng 05 nâni 2026 Ho Chi Minh city, May 26, 2026

THONG BAO THAY DOI GUY CH ING NHS DQG KY DOANH NGHIEP

Uy ban Ch*ng khofin Nha nirñ'c Viet Nam So Giao dich Chiing khoan Viet Nam

So Giao dcch Chii'ng khofin thanh pho Ho Chi Minh

Sd Giao dich Ch*ng khodn thdnh phñ Ha Noi

To:

Hocliiminli Stock Excluuige Nonoi Stock Exchange

Cñn ct theo Giay chñng nhñn dang ky doanh nghi p so 0303443233 ngay 25/05/2026, do So Tai chinh Thanh pho Ho Chi Minh cap, cliung tfii trfin tr9ng thong bao viec thay doi Giay chting nhan dang ky doanh nghi p ciia Cñng ty chung toi nhu sau:

Based on the Certificate of business registration No. 0303443233 on May 25, 2026 issued by Department of Finance o/ Ho Chi Minh City, we would like to announce the change in the Certfcate of business registration asfollows.'

• Ten to ch"ualNanie of organization: Cong ty Co phan Xay ding Coteccons

  
  
  

  - Mñ chtrng khoan/ Stock code.- CTD

• Dla chi/Address. 236/6 Dien Bién Phii, Phirong Gia Dinh, Thanh phñ Ho Chi Minh, Viet Nam

  - Dien thopi: (84) (28) 35142255 Fax: (84) (28) 35142277

• E-mail: bodsecreatary@coteccons.vn Website: coteccons.vn

1. Thñng tin trirérc khi thay dâillnformatian before cltange.'

   Von diéu le ciia Cñng ty la: 1.087.036.510.000 dong (Bang clifi: Mot nghin khñng tram tarn mmmi bay khñng tram ba miroi sau trieu nam tram muñi nghln dong).

   Charter capital of the Company is.' 1, 087, 036,510, 000 (In words.' One trillion eighty-seven billion third-six millionfive hundred ten thousand Vfetnamese Jong.

   - Tong so co ph$n: 108.703.651 cñ phan.

   Total nuntber ofshares: 108, 703, 651 shares.

2. Thñng tin sau khi thay do'i/lii/orma/ioii after cluinge.'

   Von diéu lq ciia Cñng ty la: 1.140.264.670.000 dong (Bang chit: Mot nghln mot tram bon muoi hai tram sau muoi bon trigu sau trim bay muoi nghin dong).

   Charter capital of the Company is: VND 1,140,264, d70,000 (In words: One trillion one hundred forty billion two hundred sixty-four iitillion six hundred seventy thousand Vietnaitiese dongj.

   COTECCi

   - Tong sñ co phan: 114.026.467 co phan.

   Total number ofshares.' 114, 026,467 shares.

3. Ly do thay doi: T$ng von dieu le do phat hanh co phiéu de tang von co phfin tiinguon von chñ st hFiu. Reasonfor clmnge.' ITlEFease in charter capital through the issuance o/shares to increase share capital from equity.

4. Ngiiy câ bieu 1¿c/Z'ffective date.' 25/05/2026

5. Ngay nhan dirqc Giay chiing nh{an diing doanh nghiep/fieceipz date of new certificate of business regictration: 25/05/2026

6. Thñng tin nay dñ dtr‹yc cong bo trén trang thñng tin di9n ti'r cua cñng ty vao ngay 26/05/2026 tpi duong dan https.'//coteccons.vn/investor-relations-vn//This information was published on the company's website on May 26, 2026, as in the link https://coteccons.vn7investor-relations-vn/.

Q.. ganizo/ion representative

ize

" gpdpg"" . quyén cong bo thfing tin

p' p,r information disclosure

.*'•

co cccoe

*.

‌_ e

e

s

y %

"t % % vz r r r rr

* -6 - -6; & D1 -6 - F &

* -6 D18 + - D1 ' 3 -6; & D1 -6 - F & &(

e J J K H K J KH J HIKO e e _ e J J K H K J KH J Jf J M HO e _ e e e

e J J K H K K KO e _

! "# $%

&'()( *+,- .+/- 0123 0145-6 7+8 *9-13 :1;-1 <1= >? @1A B+-13 C+,D E8F

GHIJ KLMNHO PQR STU VWWTT

eLf gHIJ KhO ijklmilnijloiijkpR qk

r st% uvwx yz{ | } | ~ } ~} } g J

_ ` abcO PQR STU VWWdd XYZ[]Y^

. -6 1 B D -61 - F D D F !=- F4 + D" 18+ D F F4 + !=- D +,

D F ! F4 + -61 - ?-6

IJL H % L&JO # $ $$$ g J e%J ` % L&JO | | ~} } ~

v u v vz% yx %

L gI K JO e

H H K JLO m

KL J J HJLO SP PV U QU

LH Jf J M HO U P U QTV

= D9 1 8 8 1 D8-

O U U P WPWS H O . E + 8 8 1 D8-

L bJLO L K L L H g J J K

G b L H J N O = 3 45-6 .::3 1 <1= '3 1 - 4 * +F @4 -63 0145-6 . -1 : 4-63 :1;-1 <1= >? @1A B+-13 C+,D E8F

a "b c NR d 9 efg fe ehihjkflmn

! "# $% & ' ((( (

STUV WXVYZ []^Y_W`

)* +! , + ++ - )* . / 0123 4

NO * P Q ' R*

56 7 8 9 8: .;<<;= > ? @A;BC D E FC G;H=;I3AJ4 3 .;<<;= > ?C KA4L <>

F( C KA4L <>

yrzrstuvw opxvw opq rstuvw opxvw