management for the year 2017 To: President Stock Exchange of Thailand The Company would like to clarify the following reasons for changes to profit (loss) in the consolidated financial statements for the year

since mid of the quarter)  Net profit was B127mn, decreasing 15.4% YoY – from Covid-19 pandemic and effect of new accounting standard adoption of Bt1.41mn.  Total revenue from core business was Bt729mn

Limited Ref: IR61/012 14 May 2018 Subject: Management Discussion and Analysis Quarter 1/2018 Ending 31 Mar 2018 To: President The Stock Exchange of Thailand Overview and factors affecting the future

Limited Ref: IR61/012 11 May 2018 Subject: Management Discussion and Analysis Quarter 1/2018 Ending 31 Mar 2018 To: President The Stock Exchange of Thailand Overview and factors affecting the future

23 April 2018 At: ACC/HO 016/61 Re: Management Discussion and Analysis for the three-month period ended 31 March 2018 To: President The Stock Exchange of Thailand During the first quarter of 2018 the

the Year as at 31 December 2017 To The President The Stock Exchange of Thailand We, ZEN Corporation Group Public Company Limited (“the Group”), are please to inform you our management discussion and

the Year as at 31 December 2017 (revised) To The President The Stock Exchange of Thailand We, ZEN Corporation Group Public Company Limited (“the Group”), are please to inform you our management

-4124 MMS-AC62/004 February 22, 2019 Subject Management discussion on 2018 operating results To The President of Stock Exchange of Thailand For 2018 operating performance, which was audited by the

Ref. PDI/BK-BS-011/2019 25th February 2019 Re: Management Discussion and Analysis (MD&A) For the year ended December 31, 2018 To: President The Stock Exchange of Thailand Due to depletion of Mae Sod

26 February 2019 Subject: Management Discussion and Analysis for the Year Ended December 31, 2018 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public Company Limited