HKE Holdings Limited, together with its subsidiaries, provides integrated design and building services in Hong Kong, Chinese Mainland, Singapore, and Malaysia. It operates through four segments: Engineering Business, FinTech Platform Business, Trading and Asset Management Business, and Investment Holding. The company offers radiation shielding works for hospitals and clinics, maintenance and other services, installation of mechanical and electrical systems, and sells tools and materials. It also provides financial technology solutions, including virtual assets trading platforms, digital and alternative assets, brokerage, and listed securities and bond services, as well as blockchain-based technology, custody infrastructure, compliance frameworks, cybersecurity protections, and risk management solutions.