Changes in Sub. S — hldr's Int (Section 138 of CA 2016) — TAN SRI ONG LEONG HUAT @ WONG JOO HWA

Changes in Sub. S-hldr's Int (Section 138 of CA 2016) OSK HOLDINGS BERHAD Particulars of substantial Securities Holder Name TAN SRI ONG LEONG HUAT @ WONG JOO HWA Nationality/Country of incorporation Malaysia Descriptions (Class) Ordinary Shares Details of changes No Date of change No of securities Type of Transaction Nature of Interest 1 14 Sep 2026 123,000 Acquired Indirect Interest Name of registered holder RHB Nominees (Tempatan) Sdn. Bhd. — OSK Equity Holdings Sdn. Bhd. Description of "Others" Type of Transaction 2 15 Sep 2026 30,000 Acquired Indirect Interest Name of registered holder RHB Nominees (Tempatan) Sdn. Bhd. — OSK Equity Holdings Sdn. Bhd. Description of "Others" Type of Transaction Circumstances by reason of which change has occurred Acquisition of Shares from Open Market Nature of interest Indirect Interest Direct (units) 81,263,791 Direct (%) 2.627 Indirect/deemed interest (units) 1,554,297,141 Indirect/deemed interest (%) 50.25 Total no of securities after change 1,635,550,932 Date of notice 18 Sep 2026 Date notice received by Listed Issuer 18 Sep 2026 Remarks: The direct and indirect interests of Tan Sri Ong Leong Huat @ Wong Joo Hwa are as follows: — Direct Int