Announced Information

Notice of transaction in shares of internal person-Mr. Le Xuan Man – Member of the Board of Directors – General Director of the Company -Subscription for 39,000 shares

Resolution of the Board of Directors No. 21/NQ-HĐQT, 22/NQ-HĐQT dated December 15, 2025

Resolution of the Board of Directors No. 20/NQ-HĐQT dated December 08, 2025

Resolution of the Board of Directors No. 19/NQ-HĐQT dated November 26, 2025.

Report on the Stock Trading Results of transaction in shares of internal person – Mr. Le Xuan Man – Member of the Board of Directors – General Director of the Company.

Notification of Changes to the Enterprise Registration Certificate of the Joint Stock Company (20th Amendment Registration)

Notice of the Trading Date for Shares with Amended Trading Registration (13/10/2025)

Decision on Approval of Changes in Share Trading Registration of BMK issued by the Hanoi Stock Exchange

Notice of transaction in shares of internal person-Mr. Le Xuan Man – Member of the Board of Directors – General Director of the Company

The Company has received a certificate of adjustment of registered share quantity

Disclosure of information on the signing of a Credit Line Agreement with SeABank – Vung Tau Branch

Black Cat received an official dispatch on the report on the results of issuing shares to pay dividends of BMK from the State Securities Commission.

Resolution of the Board of Directors approving the registration of charter capital change, change of the Company’s address, and amendment of the Company’s Charter

Report on the Stock Trading Results of transaction in shares of internal person – Mr. Le Xuan Man – Member of the Board of Directors – General Director of the Company

Notice of Change in the Number of Voting Shares

Report on ownership changes of major shareholders/investors holding 5% or more of shares - Mr. Le Xuan Man – Member of the Board of Directors – General Director of the Company

Disclosure of Information on the Signing of a Credit Facility Contract Appendix with MSB

Notice of transaction in shares of internal person-Mr. Le Xuan Man – Member of the Board of Directors – General Director of the Company

Notice regarding the record date for exercising the right to receive stock dividend for the fiscal year 2024

Notice regarding the share issuance for dividend payment for the fiscal year 2024

Disclosure of the Official Letter No. 3827/UBCK-QLCB dated July 25, 2025 from the State Securities Commission regarding the report on share issuance for dividend payment for the fiscal year 2024

Report on the Stock Trading Results of transaction in shares of internal person – Mr. Le Xuan Man – Member of the Board of Directors – General Director of the Company.

Report on trading results of shares of insiders - Mr. Le Xuan Man - Member of the Board of Directors - Director of the Company - replaces report No. 02062025

Report on results of Transaction in shares of internal person- Mr. Le Xuan Man - Member of the Board of Directors and General Director of the Company

Report on results of Transaction in shares of internal person- Mr. Le Xuan Man - Member of the Board of Directors and General Director of the Company

Disclosure of information regarding the adjustment of the Company's Organization Chart

Disclosure of extraordinary information regarding the signing of a Credit Grant Notification between Black Cat Insulation Technical Joint Stock Company and LPBank on May 7, 2025

Disclosure of information regarding the signing of a Credit Contract Appendix with SeABank.

Disclosure of the official trading on the UPCoM market

Disclosure of the first trading day and reference price

Disclosure of Stock Trading Registration

Disclosure of change in company seal format

Disclosure of Maximum Foreign Ownership Ratio

Securities Registration Certificate

Resolution and Announcement of the Shareholder List Closure