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

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According to the referral from the Stock Exchange of Thailand (SET) and the SEC’s further investigation, (1) Polyplex Corporation Limited (PCL), which directly holds 16.5 percent of PTL shares and

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Our Ref : No.V 009 /2018 February 26,2019 Subject : Explanation for operation of the year 2018 Attn : Managing Director The Stock Exchange of Thailand Varopakorn Public Company Limited would like to

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established by the Stock Exchange of Thailand and holds shares not less than seventy five percent of total sold shares of such company, whereby such company obtains an approval from the SEC to undertake back