(including in the case of acquisition through the chain principle) 8. Type of securities subject to the reporting obligation for this acquisition or disposition: 8.1 Shares ( ) Common shares ( ) Preferred

the chain principle) 8. Type of securities subject to the reporting obligation for this acquisition or disposition: 8.1 Shares ( ✔ ) Common shares ( ) Preferred shares 8.2 Convertible securities

offering of warrant to purchase ordinary shares of the Company to existing shareholders and joint ventures in subsidiary. (Edited) To: The President The Stock Exchange of Thailand Enclosure 1. Capital

2018, the six offenders with personal relationships or connection through financial routes, stocks, business or related persons, colluded by dividing tasks to place orders to buy and sell PRINC shares in

increased when comparing with cash or equate with cash by 34 MB and increased 13 MB of account receivable and inventory stocks and decreased 9 MB and decreased of other debtor from the nullification of shares

decreased when comparing with cash or equate with cash by 32 MB and increased 6 MB of account receivable and increased of the inventory stocks by 15 MB and decreased of other debtor from the nullification of

and increased 6 MB of account receivable and increased of the inventory stocks by 15 MB and decreased of other debtor from the nullification of shares agreement between UBIS and RF Vision Co.,Ltd by 320

stocks by the reporter, triggering a tender offer. Last updated on 31 March 2022

. Revised version: new report submitted by the reporter to replace theold one. Chain principle: indirect acquisition of stocks by the reporter, triggering a tender offer. Last updated on 31 March 2022

investments and fair value gains however totalled Baht 113.48 million, an increase of Baht 41.53 million or equivalent to 57.72%, due to the increase of the price of stocks listed on stock exchange of Thailand