page 1/6 (TRANSLATION) Ref. WINNER 0004/2019 February 26, 2019 Re Management Discussion and Analysis (MD&A) for the year 2018 and for the year 2017_revised To The President The Stock Exchange of

[COMPANY NAME] Ref.: EFORL IR008/2019 March 7, 2019 Subject: Management Discussion and Analysis Yearly Ending 31 December, 2018 To President The Stock Exchange of Thailand 1. Overview financial

page 1/6 (TRANSLATION) Ref. WINNER 0004/2019 February 26, 2019 Re Management Discussion and Analysis (MD&A) for the year 2018 and for the year 2017_revised 2 To The President The Stock Exchange of

คำอธิบายและการวิเคราะห์ของฝ่ายจัดการ 9 May 2019 Re: To clarify the financial statements as of 31 March 2019 To: President The Stock Exchange of Thailand WHA Corporation Public Company Limited (the

efficiently. Return on equity was 44.5% increasing YoY, due to net profit and treasury stock. Quarter Quarter Quarter 1/2018 4/2018 1/2019 Current ratio 0.59 0.58 0.63 Debt to Equity ratio 1.77 2.13 1.75

already registered the changes to the Department of Business Development, Ministry of Commerce on April 17, 2019. In this regard, the Company still uses the same stock symbol “RATCH”. Management Discussion

(Translation) May 15, 2019 Ref: SET-2019-008 Re: Management Discussion and Analysis for Quarter 1’ 2019 Attn. to: President The Stock Exchange of Thailand Filter Vision Public Company Limited and its

3344 Fax. 66 2 654 3323 No. PACE IR2019/004 Date: 15 May 2019 Subject: Explanation of the Operating Results for the three-month period ended 31 March 2019 changing over 20% To: The President The Stock

1 (Translation) MD. 134/2019 August 7, 2019 Re: Management Discussion and Analysis For the Operating Results ended June 30, 2019 To: President The Stock Exchange of Thailand Management Discussion and

Quarter of 2019 and 6-months period ending 30 June 2019 To The President The Stock Exchange of Thailand We, ZEN Corporation Group Public Company Limited (“the Group”), are pleased to provide you our