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

15 May 2019 Subject: Management Discussion and Analysis for the 3-Month Period Ended March 31, 2019 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public Company Limited

14 November 2018 Subject: Management Discussion and Analysis for the Nine-Month Period Ended September 30, 2018 To: Directors and Managers The Stock Exchange of Thailand Halcyon Technology Public

will face challenges from 1) Economic volatility, low interest, and high liquidity, 2) Aging society which requires long-term investment, and 3) Technology that will change the capital market

) Elevate standards for the supervision of gatekeepers to prevent inappropriate conduct, and (3) Leverage technology to broaden access to financial information of small-and medium-sized listed firms

online platforms compared with other jurisdictions in the region. The discussions also covered the adoption of technology and innovation in the financial landscape and the future of the financial system

% Million Baht % Million Baht % Revenues from main business EMS business 476 24% 524 33% (48) (9%) Telecommunication business 396 20% 58 4% 338 583% Related technology business 166 9% 191 12% (25) (13

: 0107545000021 4. Details of the Acquired Assets Energy Revolution Company Limited (“REV”) Business Type : Operate the business of energy-saving technology business regarding cooling tower cooling systems in the

Limited (“REV”) Business Type : Operate the business of energy-saving technology business regarding cooling tower cooling systems in the industrial sector Established Date : April 21, 2015 Registered

due to the higher revenue from related technology business and the lower revenue from EMS business. The Group’s profit for the third quarter of 2018 amounted to Baht 137 million, which was increased by