Vinythai Public Company Limited

Attachment 1

-Information of Directors, Management, Empowered Persons and Company Secretary-

1 Vinythai Public Company Limited

1. Resume of Directors as of 31 December 2020 Proportion of Family’s Work Experience in the past 5 years Shareholding Relationship Age (%) between Name-Surname / Position Educational Qualification C = Common Managemen (Year) Shares Period Position Company t D = Debentures Mr. Kazuaki Koga / 61 - Bachelor of Laws, The University - - Positions in Listed Company on SET (1) Chairman of the Board of Directors, of , 27 Apr 2017 – Present • Chairman of the Board of Directors, and • Vinythai Public Company Limited Chairman of Nomination & Chairman of Nomination & Remuneration Remuneration Committee, and Committee authorized to sign to bind the Positions in Non-Listed Company on SET (2) Company 17 Mar 2015 – Present • Commissioner • PT Asahimas Chemical, Indonesia 1 Jan 2015 – Present • Executive Officer, GM of Essential Chemicals • AGC Inc., Japan General Div. Chemicals Company Mr. Wiboon Chuchepchunkamon / 58 - Master of Management, Sasin - - Positions in Listed Company on SET (2) Graduate Institute of Business 22 Nov 2019 – Present • • Vinythai Public Company Limited Vice Chairman of the Board of Administration of Chulalongkorn Vice Chairman of the Board of Directors, Directors, Member of Nomination & University Member of Nomination & Remuneration Remuneration Committee and - Master of Science, Petroleum and Committee Petrochemical, Petroleum and authorized to sign to bind the Petrochemical College, 1 Oct 2020 – Present • Senior Executive Vice President – Downstream • PTT Global Chemical Public Company Limited Company Chulalongkorn University Petrochemical Business - Bachelor of Engineering, 1 Oct 2019 – 30 Sep 2020 • Acting Senior Executive Vice President – • PTT Global Chemical Public Company Limited Electrical Engineering, Chulalongkorn University Downstream Petrochemical Business 1 Jan 2018 – 30 Sep 2019 • Senior Vice President – Polymers Business Unit • PTT Global Chemical Public Company Limited Certificate: 1 Jul 2017 – 31 Dec 2017 • Senior Vice President – Downstream • PTT Global Chemical Public Company Limited - Role of Chairman, Thai Institute Petrochemical Business of Directors Association (IOD) 1 Jan 2016 – 30 Jun 2017 • Senior Vice President – EO-Based • PTT Global Chemical Public Company Limited - The Executive Program in Energy Literacy for a Sustainable Future, Performance Business Unit TEA, Class 13, 2019 Thailand 1 Oct 2015 – 31 Dec 2015 • Vice President – EO-Based Performance • PTT Global Chemical Public Company Limited Energy Academy Business Unit - Director Certification Program

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Proportion of Family’s Work Experience in the past 5 years Shareholding Relationship Age (%) between Name-Surname / Position Educational Qualification C = Common Managemen (Year) Shares Period Position Company t D = Debentures (DCP) Class 219/ 2016, Thai 15 Feb 2013 – 30 Sep 2015 • Vice President, Production – Olefins II • PTT Global Chemical Public Company Limited Institute of Directors Association 1 Jan 2013 – 14 Feb 2013 • Vice President, Production – LLDPE 1 • PTT Global Chemical Public Company Limited (IOD) - Stanford – NUS Executive Positions in Non-Listed Company on SET (14) Program in International 26 Mar 2019 – Present • Chairman • Revolve Group Limited Management, the Republic of Singapore 15 Nov 2019 – Present • Chairman • GC Oxirane Company Limited - Harvard – Leadership 1 Oct 2019 – Present • Chairman • GC Glycol Company Limited Development, Shanghai, the 14 Nov 2019 – Present • Director • GC-M PTA Company Limited People’s Republic of China 14 Nov 2019 – Present • Director • Thai PET Resin Company Limited

9 Oct 2019 – Present • Director • Solution Creation Company Limited 1 Oct 2019 – Present • Director • PTT Phenol Company Limited 17 Oct 2018 – Present • Director • HMC Polymers Company Limited 19 Jun 2018 – Present • Director • Kuraray GC Advance Materials Company Limited 9 Jan 2018 – Present • Director • GC Marketing Solutions Company Limited 7 May 2019 – 10 Nov 2019 • Chairman • GC Styrenics Company Limited 1 Jan 2018 – 31 Oct 2019 • Chairman • GC Logistics Solutions Company Limited 1 Jan 2018 – 31 Oct 2019 • Chairman • PL Global Transport Company Limited 22 Jan 2016 – 15 Jul 2017 • Director / Managing Director • TOC Glycol Company Limited

Mrs. Warawan Tippawanich / 57 - Master of Business Administration, - - Positions in Listed Company on SET (2) Director and Chairperson of the Chulalongkorn University 23 Nov 2020 – Present • Director and Chairperson of the Business • Vinythai Public Company Limited Business Advisory Committee and - Bachelor of Science (Chemical Advisory Committee* authorized to sign to bind the Engineering), Chulalongkorn 1 Oct 2019 – Present • Executive Vice President – Corporate Strategy • PTT Global Chemical Public Company Limited Company University 1 Jan 2015 – 30 Sep 2019 • Senior Vice President – Corporate Affairs and • PTT Global Chemical Public Company Limited Corporate Secretary Certificate:

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Proportion of Family’s Work Experience in the past 5 years Shareholding Relationship Age (%) between Name-Surname / Position Educational Qualification C = Common Managemen (Year) Shares Period Position Company t D = Debentures - Board Matters and Trends (BMT), Positions in Non-Listed Company on SET (12) * appointed as Director and - Class 2/2017 15 Sep 2020 – Present • Director • PTTGC International Private Limited, Singapore - Company Secretary Program Chairperson of the Business 1 Sep 2020 – Present • Director • GC International Corporation (CSP), Class 57/2014 Advisory Committee, with effect on 16 Nov 2019 – Present • Director • PTTGC America Corporation - Board Reporting Program (BRP), November 23, 2020 16 Nov 2019 – Present • Director • PTTGC America LLC - Class 15/2014 11 Nov 2019 – Present • Director • GC Polyols Company Limited - Company Reporting Program 1 Nov 2019 – Present • Director • GC Ventures Company Limited (CRP), Class 10/2014 1 Nov 2019 – Present • Director • GC Ventures America Corporation - Director Certification Program 9 Apr 2018 – Present • Director • Solution Creation Company Limited (DCP), Class 190/2014, Thai 24 Dec 2019 – 9 Nov 2020 • Director • GC-M PTA Company Limited Institute of Directors Association 24 Dec 2019 – 9 Nov 2020 • Director • Thai PET Resin Company Limited (IOD) Jan 2015 – 11 Nov 2019 • Director • GC Glycol Company Limited - Leadership Development Program Sep 2017 – 14 Sep 2019 • Director • Sarn Palung Social Enterprise Company Limited (LDP) 2 and (LDP) 3, PTT 26 Jan 2015 – 1 Mar 2017 • Director • PTTGC International Private Limited, Singapore Leadership and Learning Institute

Associate Professor Danuja 67 - Doctor of Philosophy (Business - - Positions in Listed Company on SET (1) Kunpanitchakit, Ph.D. / Administration), University of 29 Aug 2019 – Present • Member of Nomination and Remuneration • Vinythai Public Company Limited Independent Director, Chairperson of Wisconsin-Madison, USA Committee Audit Committee, and Member of - Master of Business Administration 28 Nov 2017 – Present • Independent Director and Chairperson of Audit • Vinythai Public Company Limited Nomination and Remuneration (Accounting), University of Committee Committee Wisconsin-Madison, USA 25 May 2012 – 27 Nov 2017 • Independent Director and Member of Audit • Vinythai Public Company Limited - Bachelor of Accountancy (First Committee Class Honors, Gold Medal), Chulalongkorn University Positions in Non-Listed Company on SET (6)

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Proportion of Family’s Work Experience in the past 5 years Shareholding Relationship Age (%) between Name-Surname / Position Educational Qualification C = Common Managemen (Year) Shares Period Position Company t D = Debentures Certificate: 29 Jun 2020 – Present • Honorable Committee Member of the University • Chulalongkorn University - Certificate in Director Council Accreditation Program (DAP) 26 Apr 2019 – Present • Independent Director and Chairperson of Audit • Capital Nomura Securities Public Company Class 98/2012, Thai Institute of Committee Limited Directors Association (IOD) 8 Mar 2018 – Present • Member of Good Governance and Social • Thai Public Broadcasting Service (ThaiPBS) - Certificate in Audit Committee Responsibility Committee Program (ACP) Class 44/2013, 24 Jul 2018 – Present • Member of Financial Management Committee • Thai Public Broadcasting Service (ThaiPBS) Thai Institute of Directors 27 Jul 2017 – Present • Honorable Committee Member in Accounting • Federation of Accounting Professions Association (IOD) 4 Jan 2017 – Present • Member of Audit Subcommittee • Deposit Protection Agency - Risk Management for Corporate 27 Feb 2014 – 26 Feb 2020 • Member of Audit Committee • Bank of Thailand Leaders (RCL) 16/2019, Thai 1 Apr 2008 – 17 May 2016 • Vice President (Finance and Accounting) • Chulalongkorn University Institute of Directors Association (IOD) - IT Governance and Cyber Resilience Program 15/2020, Thai Institute of Directors (IOD) Mr. Pipop Pruecksamars / 73 - Bachelor of Industrial Engineering, - - Positions in Listed Company on SET (2) Independent Director and Member of Chulalongkorn University 29 Aug 2019 – Present • Independent Director and Member of Audit • Vinythai Public Company Limited Audit Committee Certificate: Committee - Graduate Diploma, Environmental 28 Nov 2017 – 28 Aug 2019 • Independent Director, Member of Audit • Vinythai Public Company Limited Technology and Management, Committee, and Member of Nomination & Asian Institute of Technology Remuneration Committee - Certificate, Program for 24 Apr 2008 – 27 Nov 2017 • Independent Director, Chairman of Audit • Vinythai Public Company Limited Management Development, Committee and Member of Nomination &

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Proportion of Family’s Work Experience in the past 5 years Shareholding Relationship Age (%) between Name-Surname / Position Educational Qualification C = Common Managemen (Year) Shares Period Position Company t D = Debentures Harvard University Remuneration Committee - Certificate in Audit Committee 1 Jan 2000 – 28 Feb 2005 • Director and Public Affairs Manager • Esso (Thailand) Public Company Limited Program (ACP) Class 23/2008, Thai Institute of Directors Positions in Non-Listed Company on SET (3) Association (IOD) 1 Mar 2005 – 31 Dec 2009 • Executive Director • Petroleum Institute of Thailand - Certificate in Director 1 Oct 1997 – 28 Feb 2005 • Chairman and Managing Director • Exxon Mobil Chemical (Thailand) Co., Ltd. Certification Program (DCP) Class 1 Sep 1994 – 30 Sep 1997 • Managing Director • Thai Petroleum Pipeline Co., Ltd. 124/2009, Thai Institute of Directors Association (IOD) - Certificate in Role of the Chairman Program (RCP) Class 28/2012, Thai Institute of Directors Association (IOD) Mr. Pote Videtyontrakich / 67 - M.B.A., Harvard Business School, - - Positions in Listed Company on SET (1) Independent Director and Member of U.S.A. 3 Aug 1999 – Present • Independent Director and Member of Audit • Vinythai Public Company Limited Audit Committee - B.A. in Economics, Yale Committee University, U.S.A. Certificate: Positions in Non-Listed Company on SET (3) - Certificate in Chairman 2000, Mar 2019 – Present • Director • Hasfarm Holding Limited Class 2/2001, Thai Institute of Sep 2014 – Present • Director • Viet-Uc Seafood Joint Stock Company Director Association (IOD) Feb 2002 – Present • Managing Director • Private Equity (Thailand) Company Limited - Certificate in Director Certification Program (DCP), Class 57/2005, Thai Institute of Director

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Proportion of Family’s Work Experience in the past 5 years Shareholding Relationship Age (%) between Name-Surname / Position Educational Qualification C = Common Managemen (Year) Shares Period Position Company t D = Debentures Association (IOD) - Certificate in Capital Market Academy (CMA 16) (April – August 2013) Mr. Andre van der Heyden / 73 - Master of Metallurgical - - Positions in Listed Company on SET (2) Independent Director Engineering, Universite 29 Apr 2010 – Present • Independent Director • Vinythai Public Company Limited Catholique de Louvain, Belgium 16 Apr 2008 – 13 Dec 2011 • Managing Director • Padaeng Industry Public Company Limited 16 Nov 2000 – 30 Oct 2004 • Managing Director • Padaeng Industry Public Company Limited Positions in Non-Listed Company on SET (3) 1 Dec 2005 – 10 May 2010 • Co-owner / Executive Director • Mali Mining & Metallurgy Pte., Ltd., Singapore 1 Nov 2004 – 30 Nov 2005 • Project Director • Tenango Mining Co., Guatemala 1 May 1993 – 15 Nov 2000 • Senior Vice President • UM Zinc/Umicore, Belgium Mr. Hiroaki Sano / 55 - Bachelor of Economics, Kobe - - Positions in Listed Company on SET (1) Director, Managing Director, and University, Japan 22 Feb 2017 – Present • Director, Managing Director, and Member of • Vinythai Public Company Limited Member of Business Advisory Business Advisory Committee Committee, and authorized to sign to Positions in Non-Listed Company on SET (6) bind the Company 3 Apr 2018 – Present • Director • Thai Refined Salt Co., Ltd. 4 Apr 2017 – Present • Director • Pimai Salt Company Limited 27 Feb 2017 – Present • Chairman • Advanced Biochemical (Thailand) Co., Ltd. 22 Feb 2017 – 30 Oct 2019 • Chairman • Vinythai Holding Pte. Ltd., Singapore 22 Feb 2017 – 19 Nov 2018 • Chairman • Solvay Biochemicals (Taixing) Co., Ltd., China 1 Jan 2017 – 21 Feb 2017 • Deputy General Manager, Strategy & Planning • AGC Inc., Japan Office, Corporate Planning Div. 21 Feb 2012 – 31 Dec 2016 • Deputy General Manager, Corporate Planning • AGC Inc., Japan

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Proportion of Family’s Work Experience in the past 5 years Shareholding Relationship Age (%) between Name-Surname / Position Educational Qualification C = Common Managemen (Year) Shares Period Position Company t D = Debentures Group / Office of President 5 Jun 2011 – 20 Feb 2012 • Senior Manager, Corporate Planning Group/ • AGC Inc., Japan Office of President Mr. Yoshihisa Horibe / 55 - Bachelor of Economics, The - - Positions in Listed Company on SET (1) Director, and Member of Business University of Tokyo, Japan 26 Apr 2018 – Present • Director, and Member of Business Advisory • Vinythai Public Company Limited Advisory Committee, and authorized Committee to sign to bind the Company 22 Feb 2017 – 25 Apr 2018 • Director, and Business Director • Vinythai Public Company Limited Positions in Non-Listed Company on SET (12) 21 Jan 2020 – Present • Senior Manager, Essential Chemicals General • AGC Inc., Essential Chemicals, Southeast Asia Division, Chemicals Company Regional Office 4 Apr 2018 – Present • Director • AGC Chemicals (Thailand) Co., Ltd. 3 Apr 2018 – Present • Director • Thai Refined Salt Co., Ltd. 4 Apr 2017 – Present • Director • Pimai Salt Company Limited 6 Apr 2018 – 6 Apr 2020 • Director • AGC Chemicals Vietnam Co., Ltd. 3 Apr 2018 – 17 Mar 2020 • Director • PT Asahimas Chemical, Indonesia 1 Apr 2018 – 20 Jan 2020 • General Manager, Chlorine & Alkali Southeast • AGC Inc., Essential Chemicals, Southeast Asia Asia Div. AGC Chemicals Regional Office 1 Apr 2017 – 9 Mar 2020 • Director • PT Riken Asahi Plastics Indonesia 27 Feb 2017 – 26 March 2018 • Managing Director • Advanced Biochemical (Thailand) Co., Ltd. 22 Feb 2017 – 30 March 2018 • Director • Advanced Biochemical Europe 22 Feb 2017 – 19 Nov 2018 • Director • Solvay Biochemicals (Taixing) Co., Ltd., China 5 Oct 2015 – 21 Feb 2017 • Director • PT Asahimas Chemical, Indonesia 24 Jan 2013 – 4 Oct 2015 • Director, Business Planning, Essential • AGC Inc., Japan Chemicals Div., Business Management

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Proportion of Family’s Work Experience in the past 5 years Shareholding Relationship Age (%) between Name-Surname / Position Educational Qualification C = Common Managemen (Year) Shares Period Position Company t D = Debentures General Div. Chemicals Company 13 Feb 2011 – 23 Jan 2013 • Director, Strategic Planning Div. • AGC (China) Holdings Co., Ltd., China Mr. Masahiko Fukamachi / 58 - Bachelor of Law, Hitotsubashi - - Positions in Listed Company on SET (1) Director and authorized to sign to bind University, Tokyo, Japan 26 Apr 2018 – Present • Director • Vinythai Public Company Limited the Company Positions in Non-Listed Company on SET (6) 27 Mar 2018 – Present • Director • Pimai Salt Co., Ltd. 13 Mar 2018 – Present • Vice Chairman • Thai Refined Salt Co., Ltd. 1 Mar 2018 – Present • Member of the Board and President • AGC Chemicals (Thailand) Co., Ltd. 1 Mar 2018 – Present • Member of the Board and President • Surisa Ltd. 9 Apr 2017 – 21 Feb. 2018 • Chief Financial Officer • CMC ICOS Biologics Inc., USA 21 Jan 2017 – 8 Apr 2017 • General Manager, Bioscience Div., Life Science • AGC Inc., Japan General Division 21 Jul 2016 – 20 Jan 2017 • General Manager, Planning & Coordination • AGC Inc., Japan Group, Finance & Accounting Division 1 Oct 2013 – 20 Jul 2016 • General Manager, Business Administration • AGC Inc., Japan Office Service Center, Building & Industry Glass Company, Japan/Asia Pacific

Mr. Ryutaro Yamaki / 56 - Master of Science, Graduate - - Positions in Listed Company on SET (1) Director, and authorized to sign to School of Science, The University 22 Nov 2019 – Present • Director • Vinythai Public Company Limited bind the Company of Tokyo, Japan Positions in Non-Listed Company on SET (3) 3 Aug 2020 – Present • Director • AGC Chemicals (Thailand) Co., Ltd. 1 Oct 2019 – Present • Senior Manager, Essential Chemicals, General • AGC Inc., Essential Chemicals, Southeast Asia Div., AGC Chemicals Regional Office

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Proportion of Family’s Work Experience in the past 5 years Shareholding Relationship Age (%) between Name-Surname / Position Educational Qualification C = Common Managemen (Year) Shares Period Position Company t D = Debentures 21 Oct 2018 – 30 Sep 2019 • GM, Production Planning & Management Div., • AGC Inc., Japan AGC Chemicals 1 Jan 2016 – 20 Oct 2018 • GM, Sales & Supply Chain Management Div., • AGC Inc., Japan AGC Chemicals 21 Apr 2010 – 31 Dec 2015 • GL, Business Coordination Group, Essential • AGC Inc., Japan Chemicals, General Div., AGC Chemicals

Ms. Duangkamol Settanung / 61 - Master of Business Administration, - - Positions in Listed Company on SET (5) Director and Chairperson of the Thammasat University 1 Dec 2018 – 30 Sep 2020 • Senior Executive Vice President • PTT Public Company Limited

Business Advisory Committee and - Bachelor of Science in Statistics 17 Feb 2016 – 30 Sep 2020 • Director, and Chairperson of the Business • Vinythai Public Company Limited authorized to sign to bind the (1st Class Honors), Kasetsart Advisory Committee* Company University 1 Nov 2015 – 30 Sep 2020 • Executive Vice President, Finance and • PTT Global Chemical Public Company Limited Certificate: Accounting

- Capital Market Academy Oct 2011 – Nov 2015 • Senior Executive Vice President, Corporate • IRPC Public Company Limited * resigned from the positions in Leadership Program, Class 26, Accounting and Finance Vinythai on 30 September 2020 Capital Market Academy 1 Mar 2011 – 30 Nov 2018 • Executive Vice President • PTT Public Company Limited

- Director Certification Program Feb 2011 – Oct 2011 • Executive Vice President, Finance & Accounting• PTT Aromatics and Refining Public Company (DCP) Class 155/2012, Thai Limited Institute of Directors Association Oct 2010 – Jan 2011 • Senior Vice President, Finance & Accounting • PTT Aromatics and Refining Public Company (IOD) Limited

- Certification Program for Dec 2007 – Sep 2010 • Vice President, Corporate Strategy • PTT Aromatics and Refining Public Company “Leadership Development Program Limited III (LDP III)” PTT Leadership and Learning Institute, 2014 Positions in Non-Listed Company on SET (9)

- Certificate Program for GE : PTT 31 Oct 2019 – 30 Sep 2020 • Director • PTTGC International (USA) Inc

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Proportion of Family’s Work Experience in the past 5 years Shareholding Relationship Age (%) between Name-Surname / Position Educational Qualification C = Common Managemen (Year) Shares Period Position Company t D = Debentures Executive Program, GE U.S.A., 2 Mar 2018 – 30 Sep 2020 • Chairman • GC Treasury Center Company Limited 2012 2 Jun 2017 – 30 Sep 2020 • Director • GC Polyols Company Limited

- Accounting Standard-Business 19 Apr 2016 – 30 Sep 2020 • Director • PTT Phenol Company Limited Combination, 2019 2 Mar 2016 – 30 Sep 2020 • Director • Emery Specialty Chemicals Sdn Bhd 2 Mar 2016 – 30 Sep 2020 • Director • Emery Oleochemicals (M) Sdn Bhd 18 Jan 2016 – 30 Sep 2020 • Director • PTTGC America LLC 18 Jan 2016 – 30 Sep 2020 • Director • PTTGC America Corporation 18 Jan 2016 – 30 Sep 2020 • Director • PTTGC International Private Limited Mr. Sompot Cheeranorawanich / 54 - B.Sc. Mahidol University C : 3,990 - Positions in Listed Company on SET (1) - Vice President Corporate Affairs Shares 1 Jan 2011 – Present • Vice President Corporate Affairs and • Vinythai Public Company Limited and Communications Certificate: (0.0%) Communications - Company Secretary - Certificate in Company Secretary • Company Secretary Program (CSP), 2/2002, Thai 1 Nov 2002 – 31 Dec 2010 • Assistant Vice President Corporate Affairs and • Vinythai Public Company Limited Institute of Directors Association Communication (IOD) 1995 – 2004 • Occupational Health and Safety Management • Vinythai Public Company Limited - Certificate in Directors Representative, and Safety and Environment Certification Program (DCP) Class Department Manager 184/2014, Thai Institute of Directors (IOD) Positions in Non-Listed Company on SET (9) 1 Jan 2017 – 31 Dec 2019 • Chairman • Asia Pacific Vinyl Network (APVN) 1 Jun 2017 – 12 Jun 2019 • Chairman • Occupational Health and Safety, Mahidol University Alumni Association 30 Nov 2015 – Present • Director of Educator Scholarship Fund • Mahidol University Development, Faculty of Public Health

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Proportion of Family’s Work Experience in the past 5 years Shareholding Relationship Age (%) between Name-Surname / Position Educational Qualification C = Common Managemen (Year) Shares Period Position Company t D = Debentures 31 Aug 2015 – Present • Chairman of Environmental and Safety Sub- • Thai Industrial Estate Foundation Committee 20 Jun 2013 – Present • Director • Advanced Biochemical (Thailand) Co., Ltd 23 Feb 2010 – 19 Jun 2013 • Company Secretary • Advanced Biochemical (Thailand) Co., Ltd. 1 Oct 2009 – 31 Dec 2016 • Vice Chairman • Asia Pacific Vinyl Network (APVN) 21 Feb. 2008 – 26 Feb 2020 • Vice Chairman of Plastic Industry Club • The Federal of Thai Industries (FTI) 22 Feb 2008 – Present • Director of Petrochemical Industry Club • The Federal of Thai Industries (FTI) 19 Feb 2004 – 20 Feb 2020 • Director of Club • The Federal of Thai Industries (FTI) 22 Mar 2004 – Present • Director of PTIT Standing Committee on • Petroleum Institute of Thailand (PTIT) Refining and Petrochemical Industry 27 Mar 2008 – Present • Vice Chairman • Hazardous Substance Logistics Association (HASLA) 13 Oct 2003 – Present • Vice Chairman • Marine Science and Conservation Foundation (Vinythai Coral Foundation)

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Resume of Management as of 31 December 2020 Proportion of Family’s Work Experience in the past 5 years Shareholding Relationshi Age (%) p between Name-Surname / Position Educational Qualification (Year) C = Common Manageme Period Position Company Shares nt D = Debentures Mr. Hiroaki Sano / See details above Managing Director

Mr. Masaru Orihara / 56 - Master of Science in Engineering, - - 16 Aug 2017 – Present • Operation Director • Vinythai Public Company Limited Operation Director Graduate School of Keio University, 21 Apr 2015 – 15 Aug 2017 • Member of the Board, and Chief • AGC SEIMI Chemical Co., Ltd., Japan Tokyo, Japan Technology Officer 1 Jan 2013 – 20 Apr 2015 • General Manager, Commodity Chemical • AGC Inc., Japan Div., Chiba Plant 21 Apr 2011 – 31 Dec 2012 • General Manager, Purchase & Planning • AGC Inc., Japan Improvement Office, Chiba Plant 21 Mar 2009 – 20 Apr 2011 • General Manager, Technology Dept., • AGC Inc., Japan Commodity Chemical Div., Chiba Plant

• • Mr. Masaki Takahashi / 49 - Bachelor of Arts in Economics, - - 26 Mar 2018 – Present Business Director Vinythai Public Company Limited Business Director Graduate School of Chuo University, 26 Mar 2018 – Present • Managing Director • Advanced Biochemical (Thailand) Co., Ltd. Tokyo, Japan 21 Mar 2014 – 25 Mar 2018 • Leader of Chlor-Alkali Business Group, • AGC Inc., Japan Chlor-Alkali Division 21 Feb 2012 – 20 Mar 2014 • Manager of Chlor-Alkali Business Group, • AGC Inc., Japan Chlor-Alkali Division 21 Sep 2007 – 20 Feb 2012 • Division Manager, Sales & Marketing • PT Asahimas Chemical., Indonesia Division 21 Jul 2005 – 20 Sep 2007 • Manager, Fluorchemicals Group, • AGC Inc., Japan Sales Office

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Proportion of Family’s Work Experience in the past 5 years Shareholding Relationshi Age (%) p between Name-Surname / Position Educational Qualification (Year) C = Common Manageme Period Position Company Shares nt D = Debentures • • Mr. Shuichi Iguchi / 56 - Bachelor, - - Dec 2020 – Present Project Director Vinythai Public Company Limited Project Director School of Engineering, Feb 2020 – Dec 2020 • Senior Manager, Plant Engineering Div. • AGC Inc., Japan Department of Mechanical Technology Management General Div. Engineering, July 2019 – Jan 2020 • Leader - Essential Chemical Engineering • AGC Inc., Japan Meiji University, Tokyo, Japan Div, Technology Management General Div July 2016 – Jun 2019 • Leader – Global Group, • AGC Inc., Japan Plant Engineering Div. Technology Management General Div. Mar 2016 – May 2016 • Director – Production Management Div. • AGC Inc. Japan Technology Management General Div. Nov 2013 – Feb 2016 • Director – ASC Phase 6 Group, • AGC Inc., Japan Technology Management General Div. Mrs. Jamjuree Sirovetnukul / 56 - Master of Finance, East Texas State - - 1 Nov 2011 – Present • Vice President Finance and Accounting • Vinythai Public Company Limited Vice President Finance and University, Texas, USA 20 Jun 2013 – Present • Director • Advanced Biochemical (Thailand) Co., Ltd. Accounting - Bachelor of Finance, Thammasat 8 Dec 2011 – Present • Director • Pimai Salt Co., Ltd. University 12 Sep 2012 – 30 Oct 2019 • Director / Managing Director • Vinythai Holding Pte. Ltd. - Bachelor of Accounting, Sukhothai 3 Jul 2013 – 19 Nov 2018 • Director • Solvay Biochemicals (Taixing) Co., Ltd. Thammathirat University. 1 Jan. 2010 – 31 Oct 2011 • Chief Finance Officer/ 3S Asia Hub Shared • Solvay Asia Pacific Co., Ltd. Service Head 1 Jun 2007 – 31 Dec 2010 • Chief Finance Officer / Head of Shared • Solvay (Thailand) Ltd. Service (Thailand) 1 Jun 2002 – 31 May 2007 • Finance and Accounting Director • Lockton Insurance Brokers (Thailand) Co., Ltd.

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Mr. Sompot Cheeranorawanich / Vice President Corporate Affairs and See details above Communications - Company Secretary Mr. Apichart Kijjaroenvisal/ 54 - Bachelor of Chemical Engineering, - - 1 Jul 2017 – Present • Plant Manager • Vinythai Public Company Limited Plant Manager Chulalongkorn University 1 Apr 2014 – 30 Jun 2017 • Deputy Plant Manager • Vinythai Public Company Limited 1 Oct 2009 – 31 Mar 2014 • Senior Development New Production ECH • Vinythai Public Company Limited Department Mr. Boonchana Mangkonkarn / 54 Bachelor of Science in - - 1 Jul 2018 – present • Vice President-Purchasing and Supply • Vinythai Public Company Limited Vice President – Purchasing & Chemical Engineering 1 Apr 2014 – 30 Jun 2018 Chain Supply Chain Chulalongkorn University 1 Jan 2010 – 31 Mar 2014 • Assistant Vice President – Supply Chain • Vinythai Public Company Limited • Senior Department Manager-Supply Chain • Vinythai Public Company Limited

Miss Thippawan Thammakesorn/ 48 - Master of Business Administration - - 1 Aug 2020 – present • Deputy Accounting Department Manager • Vinythai Public Company Limited Deputy Accounting Department (Industrial Administration and 1 Jul 2019 – 31 Jul 2020 • Senior Accounting Division Manager • Vinythai Public Company Limited Manager Development) at Kasetsart 1 Jan 2012 – 30 Jun 2019 • Accounting Division Manager • Vinythai Public Company Limited University - Bachelor of Accounting, Ramkhamhaeng University

Miss Ratchada Srithongpoeng/ 40 - Master of Finance & Business - - 15 Oct 2020 - Present • Deputy Finance Department Manger • Vinythai Public Company Limited Deputy Finance Department Economics, University of Adelaide, Mar 2017 - 14 Oct 2020 • Finance Division Manager • Vinythai Public Company Limited Manager Australia Jan 2015 – Mar 2017 • Investor Relations Specialist • Thaicom Public Company Limited - Bachelor of Accounting, Bangkok Apr 2012 – Dec 2015 • Corporate Finance Manager • Berli Jucker Public Company Limited University

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Attachment 1

1.2 Roles and Responsibilities of Company Secretary

In order to comply with Section 89/15 and Section 89/16 of the Securities and Exchange Act (no.4), B.E. 2551 (2008) which is enforced on 31 August 2551, the Board of Directors has appointed the Vice President of Corporate Affairs and Communications as a Corporate Secretary. In performing this duty, the Corporate Secretary has the following roles and responsibilities

1. Arranging meetings for the Board of Directors, Sub-Committees and Annual General Meeting as well as ensuring that all resolutions have been implemented and complied with the Company's Articles of Association. 2. Ensuring the compliance of the Company and the Board of Directors with the relevant laws, rules and regulations, resolutions of both the Board and AGM's meetings including corporate governance practices. 3. Providing support for Directors and Executives to attend training courses in their relevant areas. 4. Arranging Director's training/orientation and advising for newly appointed Directors. 5. Informing Directors and Executives of any changes in regulations related to them. 6. Evaluating the performance of the Board of Directors. 7. Preparing and keeping important documents of the Company. 8. Ensuring that the directors and executives have filed report on their interest and related persons' interest, as required by laws 9. Keeping reports on interest filed by directors and executives, and presenting copies of such reports to Chairman of the Board and Chairperson of the Audit Committee, as specified by laws 10. Contacting/coordinating with the regulator such as The Stock Exchange of Thailand and ensuring that corporate information disclosures to regulatory agencies are in accordance with the laws and regulations 11. Communicating with shareholders on their legitimate rights and on the Company’s information, and serving as a communication center between shareholders and directors and executives 12. Performing other works as assigned by Board of Directors

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Vinythai Public Company Limited

2. Information of Director’s/Management’s/Controlling Person’s Position in Associated or Related Company

List of Company Assoc Other Company or Related Company Name iated Comp Vinythai any 1 2 3 4 5 6 7 8 Pimai PTTG ABT AGC JP AGC RO ACTH ASC ACVN Rapindo Salt C Mr. Kazuaki Koga X, / O O Mr. Wiboon Chuchepchunkamon V, / O Ms. Warawan Tippawamich* / O Associate Professor Danuja // Kunpanitchakit, Ph.D. Mr. Pipop Pruecksamars // Mr. Pote Videtyontrakich // Mr. Andre R. van der Heyden /// Mr. Hiroaki Sano @, / / X Mr. Yoshihisa Horibe / / O / /1 /2 /3 Mr. Masahiko Fukamachi / / @, / Mr. Ryutaro Yamaki / O / Ms. Duangkamol Settanung**** / O1 Mr. Sompot Cheeranorawanich O / Mr. Masaru Orihara O Mr. Shuichi Iguchi O Mr. Masaki Takahashi O @ Mrs. Jamjuree Sirovetnukul O / / Mr. Apichart Kijjaroenvisal O Mr. Boonchana Mangkonkarn O Miss Thippawan Thammakesorn** O Miss Ratchada Srithongpoeng*** O Mr. Kittipong Jamsak***** O Position Remark: X = Chairman / = Director O = Management V = Vice Chairman // = Independent Director / Audit Committee @ = Managing Director /// = Independent Director

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Vinythai Public Company Limited

* = appointed as the directorship in Vinythai Public Company Limited with effect on 23 Nov 2020 ** = appointed as the management in Vinythai Public Company Limited with effect on 1 Aug 2020 *** = appointed as the management in Vinythai Public Company Limited with effect on 15 Oct 2020 **** = resigned from the directorship in Vinythai Public Company Limited with effect on 30 Sep 2020

***** = transfered to other position in Vinythai Public Company Limited with effect on 30 Oct 2020

/1 = resigned from the directorship in PT Asahimas Chemical, Indonesia with effect on 17 Mar 2020 /2 = resigned from the directorship in AGC Chemicals Vietnam Co., Ltd. with effect on 6 Apr 2020 /3 = resigned from the directorship in PT Riken Asahi Plastics Indonesia with effect on 9 Apr 2020

O1 = resigned from the management in PTT Global Chemical Public Company Limited with effect on 30 Sep 2020

Other Company or Related Company 1. PTT Global Chemical Public Company Limited (PTTGC) 2. Advanced Biochemical (Thailand) Company Limited (ABT) 3. AGC Inc., Japan (AGC JP) 4. AGC Inc., Essential Chemicals, Southeast Asia Regional Office (AGC RO) 5. AGC Chemicals (Thailand) Co., Ltd. (ACTH) 6. PT Asahimas Chemical, Indonesia (ASC) 7. AGC Chemicals Vietnam Co., Ltd. (ACVN) 8. PT Riken Asahi Plastics Indonesia (Rapindo)

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