to: • Decrease in financial cost of THB 17 Million consequent to debt reduction programme. • Net gain from exchange rate of THB 71 Million resulting from the strengthen in Thai Baht, whilst last year

2019 Change % Change Revenue from sales & service 411.58 719.81 -308.23 -42.8% Other income 5.01 5.57 -0.56 -10.1% Total revenue 416.59 725.38 -308.79 -42.6% Cost of goods sold & service 383.13 638.35

1,465.51 -535.02 -36.5% Other income 3.28 4.68 -1.60 -34.2% 8.14 9.94 -1.80 -18.1% Total revenue 522.19 750.37 -228.18 -30.4% 938.63 1,475.45 -536.82 -36.4% Cost of goods sold & service 454.43 658.94 -204.51

34.7% Sales and service income 7,792.1 5,770.0 2,022.0 35.0% Other income 86.0 78.8 7.1 9.0% Cost of sales and services 6,782.4 5,192.1 1,590.2 30.6% Gross Profit 1,009.7 577.9 431.8 74.7% Gross Profit

entering high season in late of Q2/2020. Combined with this quarter being the first quarter to realize full performance of the Hydropower Plant project, “Nam San 3B” . As for the projects in Japan, they

1 25 May 2020 Subject: Notification on Resolution of the Board of Directors’ Meeting No. 5/2020, Change of Directors and Directors’ Power, Entering into Connected Transaction, Entering into Transaction on Acquisition of Assets and Determination of the 2020 Annual General Meeting of Shareholders To: Director and Manager The Stock Exchange of Thailand Enclosure 1. Information Memorandum on the Acquisition of Assets (Schedule 1) and the Entry into Connected Transaction of Nation Broadcasting Corpor...

% 19% PCBA (Cambodia) 0% 0% 0% 0% 0% IC (Ayutthaya, Thailand) 34% 34% 34% 36% 35% IC (Jiaxing, China) 5% 5% 5% 5% 5% HMT (Ohio, USA) 7% 5% 5% 5% 4% 100% 100% 100% 100% 100% Gross Profit / Cost of Sales

% 18% 18% PCBA (Cambodia) 0% 0% 0% 0% 0% IC (Ayutthaya, Thailand) 37% 33% 34% 34% 36% IC (Jiaxing, China) 7% 6% 5% 5% 5% HMT (Ohio, USA) 4% 5% 5% 5% 5% 100% 100% 100% 100% 100% Gross Profit / Cost of

100.0 15,659 100.0 Sales Revenues 20162017 * Note Please find further information in the consolidated financial statements. 2 Analysis of Costs and Expenses 1. In 2017, Cost of sales was 15,317 MTHB

Investment n/a Ranking by Industry Business 4/ Business Providing civil engineering and geotechnical works that require expertise and high technology such as underground and open excavation general civil works