According to MMI, the top 50 EMS companies are the below, 6 EMS companies in the top 50 are from Taiwan. 5 EMS companies in top top 50 are from Hong Kong.
Hon Hai Precision Industry (Foxconn ) — New Taipei, Taiwan
Pegatron — Taipei, Taiwan
Flex — Singapore
Jabil — St. Petersburg, FL
Wistron — Taoyuan, Taiwan
Sanmina — San Jose, CA
Celestica — Toronto, Canada
New Kinpo Group — New Taipei, Taiwan
Universal Scientific Industrial Co. — Shanghai, China
Venture — Singapore
Plexus — Neenah, WI
Benchmark Electronics — Angleton, TX
Shenzhen Kaifa — Shenzhen, China
Zollner Elektronik Group — Zandt, Germany
SIIX — Osaka, Japan
Fabrinet — Pathumthani, Thailand
UMC Electronics — Saitama, Japan
Integrated Micro-Electronics, Inc. — Laguna, Philippines