Management Name : Mr WILLIAM LEWIS STONE | Type of securities : Common share | Methods of Acquisition / Disposition : Buy | Transaction Date : 11/12/2015

Management Name : Mr WILLIAM LEWIS STONE | Type of securities : Common share | Methods of Acquisition / Disposition : Buy | Transaction Date : 21/06/2016

the same period of the year earlier and has gross profit margin of 31.89%. because the company has improved the structure within the organization. The company has administrative expenses of THB 3.56

progresses in the areas of market supervision and development, such as quality enhancement of IPO issuers and listed companies, legal enforcement in various cases, and improved transparency and fairness in

Attn : The Directors and The MAI Manager Ref: Dimet AC 1802/001 February 13, 2018 Attention: The Directors and The MAI Manager The Stock Exchange of Thailand Subject: Report on improved Q.2’s

margin of (11.49%). because the company has improved the structure within the organization The company has administrative expenses of THB 7.62 million, increase of THB 1.17 million or 18.03% compared to

decreased year-on-year, attributable to improved efficiency as well as on-going cost reduction and cost control. Hence, gross profit margin improved from 7.0% of sales in Q1 2016 to 7.7% of sales in Q1 2017

committees and/or delegated person to disposition of the common shares held in Prinda Public Company Limited (“PRINDA”), which is manufacturing, trading and transporting of brick, stone and sand for

company, while the company still has improved on the inventory cost management as well as sales mix management in each product category efficiently, and strictly controlled on the selling and administrative

in Malaysia. Cost of sales and services increased by only 1.2 percent while sales have increased by over 3 percent. As a result, gross profit margin as percentage of sales continuously improved, from