(Translation) UAC.CS/010/2019 May 10, 2019 Subject: Explanation of the operating results for the first quarter period ended March 31, 2019 To: President The Stock Exchange of Thailand Attachment

November 14, 2019 Subject : Management Discussion and Analysis for Nine-month and 3nd quarter ended November 30, 2019 Attention : President The Stock Exchange of Thailand 1. Operating Performance 1.1

-Translation- 1 -Translation- Ref. NCH 008/2020 February 28, 2020 Subject: Management Discussion and Analysis Yearly Ending 31 Dec 2019 Attention: President The Stock Exchange of Thailand N.C

Stock Exchange of Thailand The Board of Directors Meeting of KGI Securities (Thailand) Plc (“the Company”), No. 4/2017, held on 22nd August 2017, has approved the audited financial statements including

February 27, 2019 Subject : Management Discussion and Analysis for year and 4th quarter ended December 31, 2018 Attention : President The Stock Exchange of Thailand 1. Operating Performance 1.1

August 14, 2019 Subject : Management Discussion and Analysis for Six-month and 2nd quarter ended June 30, 2019 Attention : President The Stock Exchange of Thailand 1. Operating Performance 1.1

Microsoft Word - MD&A 1Q2018-E R.doc Ref: CSO 024/2018 Date: 14th May 2018 Subject: Management Discussion and Analysis Quarter 1 Ending 31st March 2018 Attention: President The Stock Exchange of

Page 1 of 2 T.K.S. TECHNOLOGIES % GP Q1’20 Q1’19 As Reported (% to Sales) Total GP 21.7% 25.1% Company 19.4% 27.1% TBSP 22.6% 21.6% For the 1st quarter 2020, consolidated %GP reported at 21.7%, while

August 11, 2020 Subject : Management Discussion and Analysis for Six-month and 2nd quarter ended June 30, 2020 Attention : President The Stock Exchange of Thailand Operating Performance 1. Revenues

- Translation - Ref : LPH/SET 2020/012 August 14, 2020 Subject : Clarification on the Operating Results for the 3-month and 6-month period ended June 30, 2020 (Q2/2020) To : President The Stock