หน้า 1 จาก 1 Translation August 8, 2018 Subject: Management explanation and analysis for Quarter ended 30 June 2018 Attn: The Managing Director, the Stock Exchange of Thailand Pacific Pipe Public

OHTL Public Company Limited and its subsidiaries Management Discussion and Analysis for the second quarter ended 30 June 2018 (Unit: Thousand Baht) Quarter 2 2018 Quarter 2 2017 Increased/ (Decreased

August 10, 2018 SET-18-AC-002 Dear The President The Stock Exchange of Thailand Subject: Clarification of Result’s Operation for the three months ended 30 June 2018 According to the resolution of

No.021/2018 August 14, 2018 Subject: Report the operating result for the 2nd Quarter ended June 30, 2018 and the explanation for the causes of change more than 20% in the Company’s performance To

November 8, 2018 SET-18-AC-003 Dear The President The Stock Exchange of Thailand Subject: Clarification of Result’s Operation for the three months ended 30 September 2018 According to the resolution

หน้า 1 จาก 1 Translation November 12, 2018 Subject: Management explanation and analysis for Quarter ended 30 September 2018 Attn: The Managing Director, the Stock Exchange of Thailand Pacific Pipe

set-q3-61 (Translation) LEE 13/2018 14 November 2018 Subject : Management Discussion and Analysis for the third quarter ended September 30, 2018 To : President of The Stock Exchange of Thailand We

its subsidiaries for the six-month period ended 30 June 2018 represented a loss of Baht 259.31 million. Compared to the same period of 2017, the loss was Baht 482.86 million (restated), a decrease loss

its subsidiaries for the nine-month period ended 30 September 2018 represented a loss of Baht 354.36 million. Compared to the same period of 2017, the loss was Baht 2,027.96 million (restated), a

I - Translation - Ref : LPH/SET 2019/012 November 13, 2019 Subject : Clarification on the Operating Results for the three-month period ended September 30, 2019 (Q3/2019) To : President The Stock