ASE Technology Holding Co., Ltd., together with its subsidiaries, provides semiconductor manufacturing services in the United States, Taiwan, rest of Asia, Europe, and internationally. It operates through Packaging, Testing, EMS, and Others segments. The company offers semiconductor packaging, interconnect materials production, 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, such as packaging, testing, and direct shipment of semiconductors to end users; wire bonding, including lead frame and substrate-based packages; advanced packages; heterogeneous integration; and other test-related services. In addition, the company engages in the 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, as well as offers social, marketing and sales, information software, leasing and investing, and after-sales and sales support services. Further, it engages in the substrates production; investment advisory and warehousing management; design and manufacturing of electronic components and new electronic applications; technical advisory; management, training, and consulting of organization and human resources; projection of plastic; manufacture and sale of antennas, RF amplifiers and wave straps, PCBs, and tuners; and research and development activities. The company was founded in 1984 and is based in Kaohsiung, Taiwan.