Thai Oil Public : Submission of Thai Oil Public Company Limited and its subsidiaries' financial statements and MD&A for the second quarter year 2021

(Translation)

Ref. TBK 13/0373

August 10, 2021

Subject: Submission of Thai Oil Public Company Limited and its subsidiaries' financial statements and MD&A for the second quarter year 2021

To:President of The Stock Exchange of Thailand

Attachment: 1. A copy of financial statements and independent auditor's report of Thai Oil Public Company Limited and its subsidiaries for the second quarter year 2021 period ended June 30, 2021 with a copy of English translation

1. Management's Discussion and Analysis (MD&A) and the summary of consolidated financial performance for Thai Oil Public Company Limited and its subsidiaries for the second quarter year 2021 period ended June 30, 2021
2. Company's performance report (Form F45)

Dear Sirs,

Thai Oil Public Company Limited, (the Company) would like to submit the financial statements and consolidated financial statements for the second quarter year 2021 period ended June 30, 2021 reviewed by our certified public accountant and the Company's Audit Committee. In addition, the Company's Audit Committee has given approval to disclose to public our financial statements and MD&A, as per attachments.

Thaioil and Subsidiaries performance for the second quarter year 2021 period ended June 30, 2021 could be summarized as follows:

In Q2 / 2021, Thaioil and Subsidiaries reported the Accounting Gross Integrated Margin (Accounting GIM) at

10.0 US$/bbl and had the integrated intake of 273 thousand barrels per day, Thaioil and Subsidiaries registered sales revenue and EBITDA of THB 78, 120 million and THB 7, 003 million respectively. Aggregating with operating costs, financing costs, income tax expense, loss on foreign exchange, Thaioil and Subsidiaries had net profit of THB 2,123 million, or THB 1.04 per share including impact from stock gain before tax and write-down on crude and petroleum product inventory before tax of THB 3,712 million.

…/2

- 2 -

For 6 M/21, Thaioil and Subsidiaries reported loss on Accounting Gross Integrated Margin (Accounting GIM) at 10.1 US$/bbl. With the integrated intake of 275 thousand barrels per day, Thaioil and Subsidiaries registered sales revenue and EBITDA of THB 151, 570 million and THB 15, 275 million respectively. Aggregating with operating costs, financing costs, income tax expense and loss on foreign exchange, Thaioil and Subsidiaries had net profit of THB 5,483 million, or THB 2.69 per share.

As of June 30, 2021, Thaioil and Subsidiaries had total assets of THB 320,316 million, increasing from the year ended 2020 by THB 14,128 million mainly due to an increase in non-current assets, i.e. property, plant, and equipment, from investments in several projects as planned. For total liabilities of Thaioil and Subsidiaries, it increased by THB 15,684 million from the year ended 2 0 20 to THB 201,753 million due to higher current liabilities primarily in trade accounts payable tracking higher average crude oil price in June 2021 than December 2020. In addition, Thaioil and Subsidiaries had total equity of THB 1 18,564 million, decreasing by THB 1,554 million from the end of 2020 due to total comprehensive expense offsetting with dividends paid to non-controlling interests and shareholders of the Company.

Please be informed accordingly.

Yours truly,

Thai Oil Public Company Limited

-//-

Mr. Wirat Uanarumit

Chief Executive Officer and President

Investor Relations Section

Tel. [phone] Extension 42060 - 42063 / Fax. [phone]