SET LETTER Q2-2017 -1- Ref. POL. 103/2017 August 15, 2017 Re: Clarification of the Performance of S & P Syndicate Public Company Limited Dear The President The Stock Exchange of Thailand S & P

set-q3-60 (Translation) LEE 21/2017 14 November 2017 Subject : Management Discussion and Analysis for the third quarter ended September 30, 2017 To : President of The Stock Exchange of Thailand We

set-q4-60 (Translation) Ref.No.LEE 02/2018 27 February, 2018 Subject : Management Discussion and Analysis for the year ended December 31, 2017 To : President of The Stock Exchange of Thailand We

set-q4-61 (Translation) Ref.No.LEE 02/2019 27 February, 2019 Subject : Management Discussion and Analysis for the year ended December 31, 2018 To : President of The Stock Exchange of Thailand We

set-q1-62 (Translation) Ref.No.LEE 07/2019 May 14, 2019 Subject : Management Discussion and Analysis for the first quarter ended March 31, 2019 To : President of The Stock Exchange of Thailand We

set-q1-61 (Translation) Ref.No.LEE 09/2018 May 14, 2018 Subject : Management Discussion and Analysis for the first quarter ended March 31, 2018 To : President of The Stock Exchange of Thailand We

set-q2-61 (Translation) LEE 10/2018 14 August 2018 Subject : Management Discussion and Analysis for the second quarter ended June 30, 2018 To : President of The Stock Exchange of Thailand We submit

set-q3-61 (Translation) LEE 13/2018 14 November 2018 Subject : Management Discussion and Analysis for the third quarter ended September 30, 2018 To : President of The Stock Exchange of Thailand We

+ 66 (2) 6452828, + 66 (2) 6452829 VAT ID 0107538000151 Thailand W www.wiik-hoeglund.com LWH/SET/19/01/LT001 January 4, 2019 Subject: Information on the investment in WOG ITR Water Solution Company

+ 66 (2) 6452828, + 66 (2) 6452829 VAT ID 0107538000151 Thailand W www.wiik-hoeglund.com LWH/SET/19/01/LT001 วนัที 4 มกราคม เรือง สารสนเทศการลงทุนในบริษทั ดบัเบิลยโูอจี ไอทีอาร์ วอเตอร์ โซลูชนั จาํกดั