Aurotek Corporation

Taiwan's largest test and measurement company listed on TWSE. Chroma produces power supply test systems, battery test solutions, LED/display testing, and automated test equipment for semiconductor and EV industries.

World-leading semiconductor probe station manufacturer. MPI produces advanced probe systems for wafer-level testing, thermal characterization, and RF/mmWave testing. Essential equipment for semiconductor fabs and research labs.

One of the world's largest LED and optoelectronic component manufacturers. Everlight produces infrared sensors, ambient light sensors, proximity sensors, and photointerrupters widely used in industrial automation and factory equipment.