ASE Technology Holding Co., Ltd., together with its subsidiaries, provides semiconductor manufacturing services in assembly and testing in the United States, Taiwan, Europe, Asia, and internationally. It operates through Packaging, Testing, EMS, and Others segments. The company offers semiconductor packaging, production of interconnect materials, front-end engineering testing, wafer probing, and final testing services, as well as integrated solutions for EMS (electronic manufacturing services) in relation to computing, peripherals, communications, industrial, automotive, and server applications. It also provides turnkey services, which comprise packaging, testing, and direct shipment of semiconductors to end users; wirebonding, including lead frame-based packages and substrate-based packages; advanced packages; heterogeneous integration; and other test-related services. In addition, the company engages in the social; marketing and sales; information software; leasing and investing; after-sales service and sales support; leasing of properties; development, construction, sale, and management of real estate properties; management of parking lot; leasing of properties for shopping center; and management of commercial complex services and department store trading activities. Further, it undertakes production of substrates; investment advisory and warehousing management; design and manufacturing of electronic components and new electronic applications; technical advisory services; management, training, and consulting of organization and human resources; projection of plastic; manufacturing and sale of antennas, RF amplifiers and wave straps, PCBs, and tuners; and research and development activities. ASE Technology Holding Co., Ltd. was founded in 1984 and is based in Kaohsiung, Taiwan.