Page 1 of 4 T.K.S. TECHNOLOGIES % GP Y18 Y17 As Reported Total GP 21.3% 23.9% Company 24.1% 23.9% TBSP 16.9% - Company reported %Gross Profit Margin for year 2018 of 21.3%, while showed of 23.9% in

Page 1 of 3 T.K.S. TECHNOLOGIES % GP Q1’19 Q1’18 As Reported Total GP 25.0% 23.0% Company 27.1% 23.0% TBSP 22.2% - For the 1st quarter 2019, consolidated %GP reported at 25.0%, while showed of 23.0

Page 1 of 3 T.K.S. TECHNOLOGIES Business Overview T.K.S. Technologies Public Company Limited (“company”) reported total revenues from sales of THB 312 mil. for the 1st quarter 2018, which dropped of

1 -Translation- Ref :IR 62/023 December 23, 2019 Subject: Change in Shareholding Structure of Subsidiary Company (edit) To: President, The Stock Exchange of Thailand T.K.S. Technologies Public

1 -Translation- Ref :IR 62/023 December 23, 2019 Subject: Change in Shareholding Structure of Subsidiary Company (edit no.2 ) To: President, The Stock Exchange of Thailand T.K.S. Technologies Public

Page 1 of 3 T.K.S. TECHNOLOGIES Unit: % Y2019 Y2018 As Reported (% to Sales) Gross profit margin 21.3% 21.0% TKS 23.4% 23.6% TBSP 18.6% 16.9% Gross profit margin in 2019 was 21.3% in comparison to

T.K.S. TECHNOLOGIES 1 March 2021 Re: Management Discussion and Analysis for the period ended 31 December 2020 To: President The Stock Exchange of Thailand T.K.S. Technologies Public Company Limited

Page 1 of 4 T.K.S. TECHNOLOGIES THB million 1H18 1H17 %Chg As Reported Total Revenues 900 653 38% Company 624 653 -4% TBSP 276 - 100% 2Q18 Key Highlight On April 4, 2018, the Company had acquired the

Page 1 of 5 T.K.S. TECHNOLOGIES Business Overview 3Q19 and 9M19 Performance 3Q19 THB million Q3 19 Q3 19 %Chg As Reported Total Revenues 624.4 603 3.6% Company 362.1 337 7.5% TBSP 262.0 266 (1.4

T.K.S. TECHNOLOGIES 11 August 2020 Re: Management Discussion and Analysis for Quarter 2/2020 To: President The Stock Exchange of Thailand T.K.S. Technologies Public Company Limited (“TKS”) and its