6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 

of the Securities Exchange Act of 1934

For the month of January 2021

Commission File Number 1-14966

CNOOC Limited

(Translation of registrant’s name into English)

65th Floor

Bank of China Tower

One Garden Road

Central, Hong Kong

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x    Form 40-F ¨ 

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ¨    No x

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): Not applicable

Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	CNOOC Limited
By:	/s/ Xiaonan Wu
Name:	Xiaonan Wu
Title:	Joint Company Secretary

Date: January 22, 2021

EXHIBIT INDEX

Exhibit No.	Description
99.1	Voluntary Announcement

EX-99.1

Exhibit 99.1

Hong Kong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement, make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arising from or in reliance upon the whole or any part of the contents of this announcement.

(Incorporated in Hong Kong with limited liability under the Companies Ordinance) 

(Stock Code: 00883)

VOLUNTARY ANNOUNCEMENT

This announcement is made by CNOOC Limited (the “Company”) on a voluntary basis.

The board of directors of the Company (the “Board”) has noted the decrease in the price of the shares of the Company (the “Shares”) on The Stock Exchange of Hong Kong Limited on 22 January 2021.

The Company noted news reports regarding removal of the Company from certain indexes and disposal of the Shares by certain funds. Having made such enquiry with respect to the Company as is reasonable in the circumstances, the Board confirms that it is not aware of any information which must be announced to avoid a false market in the Company’s securities or of any inside information that needs to be disclosed under Part XIVA of the Securities and Futures Ordinance (Chapter 571 of the Laws of Hong Kong).

Shareholders of the Company and prospective investors are advised to exercise caution when dealing in the Shares.

By Order of the Board 

CNOOC Limited 

Wu Xiaonan 

Joint Company Secretary

Hong Kong, 22 January 2021

As at the date of this announcement, the Board comprises:  

Executive Directors Xu Keqiang Hu Guangjie   Non-executive Directors Wang Dongjin (Chairman) Li Yong (Vice Chairman) Wen Dongfen   Independent Non-executive Directors
Chiu Sung Hong Lawrence J. Lau Tse Hau Yin, Aloysius Qiu Zhi Zhong