| THOMSON, Jon ACTIVE | Secretary | 01 Mar 2021 | | | | Wework C/O Sumco Europe Sales Plc, 30 Churchill Place 1st - 10th Floor, London, E14 5RE, United Kingdom |
| DORMAN, Paul Richard ACTIVE | Director | 22 Jun 2021 | | England | March 1963 | Wework C/O Sumco Europe Sales Plc, 30 Churchill Place 1st - 10th Floor, London, E14 5RE, United Kingdom |
| KATO, Chiaki ACTIVE | Director | 29 Apr 2024 | | Japan | December 1965 | Sumco Corporation, Seavans North, 1-2-1 Shibaura Minato-Ku, Tokyo, 105-8634, Japan |
| NISHIOKA, Yoichi ACTIVE | Director | 27 Mar 2026 | | Japan | February 1971 | Sumco Corporation, Seavans North, 1-2-1 Shibaura Minato-Ku, Tokyo, 105-8634, Japan |
| KUWAHARA, Akihiko RESIGNED | Secretary | 01 May 2017 | 01 May 2019 | | | Level 32, 25 Canada Square, London, E14 5LQ, United Kingdom |
| MACHIDA, Norihisa RESIGNED | Secretary | 01 May 2019 | 01 Mar 2021 | | | Level 32, 25 Canada Square, Canary Wharf, London, E14 5LQ, United Kingdom |
| MEYER, Janine Marjorie RESIGNED | Secretary | | 01 Jan 1998 | | | 9 Rookery Close, Kennington, Ashford, Kent, TN24 9RP |
| MUSTAFA, Shamsudin RESIGNED | Secretary | 14 Feb 2001 | 01 May 2017 | | | Level 32, 25 Canada Square, London, E14 5LQ, United Kingdom |
| YOSHIMOTO, Yoshihiro RESIGNED | Secretary | 01 Jan 1998 | 14 Feb 2001 | | | Flat 8 Block B, 11 Sheldon Square, Paddington Central, London, W2 6DQ |
| AWA, Toshihiro RESIGNED | Director | 01 Jan 2012 | 17 Jun 2022 | Japan | January 1962 | Level 32, 25 Canada Square, London, E14 5LQ, United Kingdom |
| FUJISAWA, Masahiro RESIGNED | Director | 07 May 2002 | 25 Apr 2008 | | August 1947 | 720 - 119 Hananoi, Kashiwa - Shi, Chiba, 277 - 0812, Japan |
| GILL, Robert John RESIGNED | Director | 01 Feb 2002 | 24 Mar 2004 | | November 1944 | Flat 3 Regents Park House, 105 Park Road, London, NW8 7JP |
| HIROE, Motoji RESIGNED | Director | 01 Feb 2002 | 25 Apr 2003 | | June 1942 | 7-14-9 Shindaiji-Kitamachi, Chofu, Tokyo 182-0011, FOREIGN, Japan |
| HIROSE, Yutaka RESIGNED | Director | 01 Sep 2001 | 01 Feb 2002 | | June 1946 | 2 34 11 Shimoigusa, Suginami Ku, Tokyo, FOREIGN, Japan |
| HORIGUCHI, Hitoshi RESIGNED | Director | 27 Nov 1995 | 30 Jun 2000 | | April 1939 | 21 Godolphin House, 76-84 Fellows Road, London, NW3 3LG |
| INOUE, Fumio RESIGNED | Director | 25 Apr 2008 | 28 Mar 2014 | Japan | August 1957 | 1, Sheldon Square, London, W2 6TT, United Kingdom |
| ISHITOYA, Soichi RESIGNED | Director | 01 Jul 2001 | 01 Aug 2003 | | July 1947 | 26 Hunter Lodge, Carlton Gate, London, W9 3TQ |
| KATSUBE, Kazuo RESIGNED | Director | 01 Jul 2000 | 01 Apr 2003 | | May 1944 | Flat 22 Provost Court, Eton Road, London, NW3 4SR |
| KOBAYASHI, Tamio RESIGNED | Director | 26 Apr 2005 | 25 Apr 2008 | | April 1952 | 1-9-18 Hirose-Dai, Sayama-Shi, Saitama, 350-1328, Japan |
| KUBOZOE, Shinichi RESIGNED | Director | 28 Mar 2014 | 29 Apr 2024 | Japan | August 1962 | Sumco Corporation, Seavans North, 1-2-1 Shibaura Minato-Ku, Tokyo, 105-8634, Japan |
| NAGANO, Kazuie RESIGNED | Director | 30 Jun 1998 | 12 Nov 2001 | | November 1940 | 3 - 16 Hachiyama Cho Shibuya Ku, Tokyo 150 0035, Japan, FOREIGN |
| OSUMI, Tokuyashu RESIGNED | Director | | 30 Jun 1998 | | March 1935 | 1-9-4 Tukushigdoka, Kashiwa, Chiba, FOREIGN, Japan |
| RYUTA, Jiro RESIGNED | Director | 27 Apr 2011 | 01 Jan 2012 | Japan | February 1960 | 1, Sheldon Square, London, W2 6TT, United Kingdom |
| SASAKI, Yasuharu RESIGNED | Director | 17 Jun 2022 | 27 Mar 2025 | Japan | August 1961 | Sumco Corporation, Seavans North, 1-2-1 Shibaura Minato-Ku, Tokyo, 105-8634, Japan |
| SHIBUYA, Shigetoshi RESIGNED | Director | 01 Sep 2001 | 01 Mar 2006 | | February 1945 | Tamagawa Haimu 1 901 2 24 10, Shimomaruko Ota Ku, Tokyo, FOREIGN, Japan |
| SUMIYA, Hidemi RESIGNED | Director | 28 Apr 2004 | 26 Apr 2005 | | January 1951 | 19-20 Seijoh, 1-Chome,, Setagaya-Ku, Tokyo 157-0066, FOREIGN, Japan |
| SWANTKO, James Theodore RESIGNED | Director | 01 Apr 2017 | 22 Jun 2021 | United States | February 1954 | Level 32, 25 Canada Square, London, E14 5LQ, United Kingdom |
| TAKAHASHI, Kazutami RESIGNED | Director | 01 Mar 2006 | 27 Apr 2011 | England | December 1949 | 18, Boydell Court, St. John's Wood Park, London, NW8 6NJ, United Kingdom |
| YADA, Ginji RESIGNED | Director | 27 Mar 2025 | 27 Mar 2026 | Japan | May 1968 | Sumco Corporation, Seavans North, 1-2-1 Shibaura Minato-Ku, Tokyo, 105-8634, Japan |
| YAMADA, Takashi RESIGNED | Director | 25 Apr 2008 | 31 Mar 2017 | Japan | April 1957 | Level 32, 25 Canada Square, London, E14 5LB, United Kingdom |
| YOSHIDA, Tsugio RESIGNED | Director | 25 Mar 2004 | 01 Mar 2006 | | May 1948 | 56 Buttermere Court, Boundary Road, London, NW8 6NS |
| YOSHIMOTO, Yoshihiro RESIGNED | Director | | 01 Sep 2001 | England | August 1941 | Flat 8 Block B, 11 Sheldon Square, Paddington Central, London, W2 6DQ |