- SMM KOREA Co.,Ltd.
- Malaysian Electronics Materials SDN. BHD.
- Sumitomo Metal Mining Electronics Materials (Shanghai) Co.,Ltd.
- Taiwan Sumiko Materials Co., Ltd.
- Sumitomo Metal Mining Asia Pacific Pte.Ltd.
- M-SMM Electronics SDN.BHD.
- Sumiko Electronics Suzhou Co.,Ltd.
- Sumiko Electronics Taiwan Co.,Ltd.
- Sumiko Leadframe Chengdu Co.,Ltd.
- Sumiko Leadframe (Thailand) Co.,Ltd.
- Sumiko Precision Chengdu Co., Ltd.
- Dongguan Sumiko Electronic Paste Co.,Ltd.
- Shanghai Sumiko Electronic Paste Co., Ltd.
