NOTES TO THE FINANCIAL STATEMENTS FOR THE FINANCIAL YEAR ENDED 31 DECEMBER 2022 9 INVESTMENT IN SUBSIDIARIES (CONTINUED) Details of subsidiaries are as follows (continued): Group’s effective interest 2022 % 2021 % Country of incorporation Principal activities # Wasco Engineering International Ltd. 100 100 British Virgin Islands Leasing of compressors and power generators, designing, engineering and fabrication and sale of gas processing and compression systems and gas based power generators; and servicing and selling parts of oil and gas processing and compression systems * WEGL Services India Private Limited -y 100 India Dormant * PT Wasco Engineering International 100 100 Indonesia Dormant * WS Engineering & Fabrication Pte. Ltd. 100 100 Singapore Design, engineering and fabrication of oil and gas processing and compression systems and equipment * WEGL Offshore Investments Pte. Ltd. (formerly known as MMA Offshore Holdings Pte. Ltd.) 100a - Singapore Investment holding * WEGL investments Pte. Ltd. (formerly known as MMA Offshore Investments Pte. Ltd.) 100a - Singapore Investment holding * PT Wasco Resources Indonesia (formerly known as PT Jaya Asiatic Shipyard) 100a - Indonesia Investment and property holding ~ Wasco Engineering Australia Pty. Ltd. 100 100 Australia Dormant * WS Engineering Equipment Pte. Ltd. 100 100 Singapore Leasing of equipment and provision of operation and maintenance, and other related services to the oil and gas industry ~ Mackenzie Hydrocarbons (Australia) Pty. Ltd. 100 100 Australia Provision of engineering consultancy and fabrication services * WS Engineering Technologies Pte. Ltd. 92 92 Singapore Engineering and fabrication of oil and gas systems and equipment # PT. Wasco Engineering Indonesia 92 92t Indonesia Provision of engineering, design, fabrication and construction services for oil and gas industry Wah Seong Corporation Berhad Annual Report 2022 146
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