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Yong Fang Yi
President at
RS TECHNOLOGIES CO., LTD.
Net worth: 547 M $ as of 31/05/2026
Profile
Yong Fang Yi currently works at LE System Co., Ltd., as Chief Executive Officer & Representative Director, RSTEC Semiconductor Taiwan Co. Ltd., as Chairman from 2015, Beijinng GRINM RS Semicondactor Materials Co., Ltd., as Chairman from 2018, RS Technologies Co. Ltd., as President & Representative Director from 2010, and DG Technologies Co., Ltd., as Director from 2019.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
RS TECHNOLOGIES CO. LTD. 43.82% | 31/12/2025 | 11,655,000 ( 43.82% ) | 545 M $ | 31/05/2026 |
Sanden Corp.
 Sanden Corp. Industrial MachineryProducer Manufacturing Manufactures, develops, and sells automobile equipment 1.79% | 31/12/2025 | 2,005,500 ( 1.79% ) | 2 M $ | 31/05/2026 |
Yong Fang Yi active positions
| Companies | Position | Start |
|---|---|---|
| RS TECHNOLOGIES CO., LTD. | President | 10/12/2010 |
RSTEC Semiconductor Taiwan Co. Ltd.
 RSTEC Semiconductor Taiwan Co. Ltd. SemiconductorsElectronic Technology Manufactures devices related to semiconductors | Chairman | 01/12/2015 |
Beijinng GRINM RS Semicondactor Materials Co., Ltd. | Chairman | 01/01/2018 |
DG Technologies Co. Ltd.
 DG Technologies Co. Ltd. Industrial MachineryProducer Manufacturing Manufactures and sells consumable parts for semiconductor manufacturing equipment | Director/Board Member | 01/01/2019 |
LE System Co., Ltd.
 LE System Co., Ltd. Electrical ProductsProducer Manufacturing Develops, manufactures and sells redox flow batteries | Chief Executive Officer | - |
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
15
1st degree connections
5
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 5 |
|---|---|
RS Technologies Co. Ltd.
 RS Technologies Co. Ltd. Industrial MachineryProducer Manufacturing Engages in silicon wafer reclaim and wafer oxide film coating services as well as semiconductor wafer manufacturing consulting services | Producer Manufacturing |
LE System Co., Ltd.
LE System Co., Ltd. Electrical ProductsProducer Manufacturing Develops, manufactures and sells redox flow batteries | Producer Manufacturing |
RSTEC Semiconductor Taiwan Co. Ltd.
RSTEC Semiconductor Taiwan Co. Ltd. SemiconductorsElectronic Technology Manufactures devices related to semiconductors | Electronic Technology |
Beijinng GRINM RS Semicondactor Materials Co., Ltd. | |
DG Technologies Co. Ltd.
DG Technologies Co. Ltd. Industrial MachineryProducer Manufacturing Manufactures and sells consumable parts for semiconductor manufacturing equipment | Producer Manufacturing |
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