Kulthorn Kirby Co., Ltd.

Name	Mr. Sutee Simakulthorn *
Age	56
Nationality	Thai
Position	Chairman of the board of directors/Acting President
Date of appointment as director	25 April 2018
Number of ordinary share held in the company	32,124,655 shares
Number of ordinary share held in the company	2.14164 %
Educational background	- Master Degree in Science in Management, Purdue University, U.S.A. - Bachelor Degree in Engineering, Chulalongkorn University
IOD training	Director Certification Program (DCP) / 2003
Position in the company	None
Positions held in other listed companies	None
Other position, present	Chairman/Managing Director - Kulthorn Premier Co., Ltd. Chairman - Kulthorn Kirby Foundry Co., Ltd. - Kulthorn Steel Co., Ltd. - Kulthorn Materials and Controls Co., Ltd. - Kulthorn Metal Products Co., Ltd. - Kulthorn Research and Development Co., Ltd. Director - Suzhon Kulthorn Magnet Wire Co., Ltd.
Work experience	1998 - Present To work in Kulthorn Kirby Public Company Limited 2003 - 10 April 2018 Director, Kulthorn Kirby Public Company Limited

Name	Mr Sutas Simakulthorn
Age	53
Nationality	Thai
Position	Director
Date of appointment as director	12 May 2021
Number of ordinary share held in the company	42,295,530 shares
Number of ordinary share held in the company	2.81970 %
Educational background	– Master of Business Administration (MBA), University of Southern California, USA. – Bachelor Degree in Engineering, Chulalongkorn University
IOD training	None
Position in the company	None
Positions held in other listed companies	None
Other position, present	Director – Kulthorn Premier Co., Ltd. – Kulthorn Steel Co., Ltd. – Kulthorn Materials and Controls Co., Ltd. – Kulthorn Metal Products Co., Ltd. – Kulthorn Research and Development Co., Ltd. – Thai Compressor Manufacturing Co., Ltd Managing Director – Kulthorn Co., Ltd. – Kulthorn Electric Co., Ltd
Work experience	2009 Present Managing Director – Kulthorn Co., Ltd. 2003- 2009 Executive Vice President – Thai Compressor Manufacturing Co., Ltd. 2002-2003 Vice President – Kulthorn Co., Ltd. 1997-2000 Engineering – Mitsubishi Heavy Industries, Japan 2997 Engineering – Thai Compressor Manufacturing Co., Ltd.

Name	Mrs. Supanee Chantasasawat*
Age	57
Nationality	Thai
Position	Director
Date of appointment as director	10 July 2024
Number of ordinary share held in the company	7,251,122
Number of ordinary share held in the company	0.48341 %
Educational background	– SASIN Graduate Institute of Business Administration Chulalongkorn University, MBA (Marketing) – Chalalongkorn University, Bachelor of Accountancy
IOD training	2012 - 2013 Specialist Bar on Intellectual Property
Position in the company	Executive Vice President (Marketing)
Positions held in other listed companies	None
Other position, present	None
Work experience	2018 – July 2019 Chief Strategy Officer Kulthorn Kirby Public Company 2012 – 2018 Executive Chairperson Kulthorn Group of Companies 1998 – 2012 Sales and Marketing Director Kulthorn Group of Companies 1994 – 1998 Procter & Gamble Manufacturing (Thailand) Assistant Brand Manager 1991 – 1992 Industrial Finance corporation of Thailand (IFCT) Credit Officer Social Activies 2018 National Legislative Assembly Working Group on Waste of Electrical and Electronics Equipment Law-Committee Member 2010 – Present Federation of Thai Industry • Member of the Board (2012 – 2014) • Air Conditioning Club Vice Chairman (2010 – Present) • Electrical, Electronic and Telecommunication Club Board Member (2018 – Present)

Name	Mr. Tawatchai Jaranakarun
Age	71
Nationality	Thai
Position	Independent Director / Chairman of the Audit Committee
Date of appointment as director	16 December 1998
Number of ordinary share held in the company	1,430 shares (holding by spouse)
Number of ordinary share held in the company	0.0001 %
Educational background	- Bachelor Degree in Law, Ramkhamkaeng University - Thai Barrister at Law - Capital Market Academy 17
IOD training	Director Accreditation Program (DAP) / 2004
Position in the company	None
Positions held in other listed companies	None
Other position, present	Lawyer by profession
Work experience	1978 - Present Lawyer 1977 - 1978 Official Receiver, Ministry of Justice 1976 - 1977 Land officer, Department of Land, Ministry of Interior

Name	Mr. Somlak Jiamtiranat
Age	76
Nationality	Thai
Position	Independent Director/Member of the Audit Committee
Date of appointment as director	28 April 2010
Number of ordinary share held in the company	None
Number of ordinary share held in the company
Educational background	Bachelor Degree in Electrical Engineering (Communication) Chulalongkorn University
IOD training	Director Certification Program (DCP) / 2003
Position in the company	None
Positions held in other listed companies	None
Other position, present	Director - Champ Alliance Co., Ltd. - Champ Supply Center Co., Ltd. - Green Estate and K. Holding Group Co., Ltd.
Work experience	Member, Science and Technology Committee President, Crown Seal Public Company Limited. Managing Director, Siam NEC Co., Ltd. Managing Director, Siam Compressor Industry Co., Ltd.

Name	Mr Paiboon Boonpermvitaya
Age	70
Nationality	Thai
Position	Director
Date of appointment as director	11 June 2026
Number of ordinary share held in the company	2,178,825 shares
Number of ordinary share held in the company	0.145 %
Educational background	Bachelor Degree in Industrial Engineering, King Mongkut’s University of Technology Thonburi
IOD training	Director Certification Program (DCP) / 2011
Position in the company	None
Positions held in other listed companies	None
Other position, present	Advisor
Work experience	2025 – Present To work in Kulthorn Kirby Public Company Limited

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Company Structure :

Company StructureBoard of Director

Mr. Sutee Simakulthorn *

Mr Sutas Simakulthorn

Mrs. Supanee Chantasasawat*

Mr. Tawatchai Jaranakarun

Mr. Somlak Jiamtiranat

Mr Paiboon Boonpermvitaya