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Masashi Semba
Director/Board Member at
Vertex Co., Ltd.(Vertex)
Net worth: 10 M $ as of 30/05/2026
Profile
Masashi Semba currently works at Vertex Co., Ltd.(Vertex), as Director & Vice President from 2017.
Mr. Semba also formerly worked at Haneda Concrete Industrial Co., Ltd., as President & Representative Director from 2002 to 2014, Haneda Zenith Holdings Co., Ltd., as Representative Director & Vice President, and Vertex Corp., as Director & Vice President from 2018 to 2020.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
VERTEX CORP. 1.78% | 30/03/2025 | 1,030,000 ( 1.78% ) | 10 M $ | 30/05/2026 |
Masashi Semba active positions
| Companies | Position | Start |
|---|---|---|
Vertex Co., Ltd.(Vertex)
 Vertex Co., Ltd.(Vertex) Construction MaterialsNon-Energy Minerals Manufactures concrete products | Director/Board Member | 31/03/2014 |
Former positions of Masashi Semba
| Companies | Position | End |
|---|---|---|
Haneda Concrete Industrial Co., Ltd.
 Haneda Concrete Industrial Co., Ltd. Construction MaterialsNon-Energy Minerals Manufactures and wholesales concrete products, machinery and equipment rental, and construction materials | President | 31/03/2014 |
| VERTEX CORPORATION | Director/Board Member | - |
Haneda Zenith Holdings Co., Ltd.
 Haneda Zenith Holdings Co., Ltd. Construction MaterialsNon-Energy Minerals Operates a holding company which engages in the manufacture and sale of concrete products | Director/Board Member | - |
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
8
1st degree connections
4
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 4 |
|---|---|
Haneda Concrete Industrial Co., Ltd.
Haneda Concrete Industrial Co., Ltd. Construction MaterialsNon-Energy Minerals Manufactures and wholesales concrete products, machinery and equipment rental, and construction materials | Non-Energy Minerals |
Haneda Zenith Holdings Co., Ltd.
Haneda Zenith Holdings Co., Ltd. Construction MaterialsNon-Energy Minerals Operates a holding company which engages in the manufacture and sale of concrete products | Non-Energy Minerals |
Vertex Co., Ltd.(Vertex)
Vertex Co., Ltd.(Vertex) Construction MaterialsNon-Energy Minerals Manufactures concrete products | Non-Energy Minerals |
Vertex Corp.
 Vertex Corp. Construction MaterialsNon-Energy Minerals Operates as a holding company through its subsidiaries manufactures secondary concrete products | Non-Energy Minerals |
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