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China Oilfield Services Limited — Investor Relations & Filings

Ticker · 2883 HKEX Mining and quarrying
Open in API
Filings indexed 1,859 across all filing types
Latest filing 2026-03-16 Capital/Financing Update
Country HK Hong Kong
Listing HKEX 2883

About China Oilfield Services Limited

http://www.cosl.com.cn

China Oilfield Services Limited (COSL) is a large-scale integrated oilfield service provider and the core services arm of the CNOOC Group. COSL offers comprehensive solutions spanning all phases of oil and gas exploration, development, and production, primarily focusing on the Asian offshore market. Its operations are divided into four major segments: geophysical services, drilling services, well services (including oilfield technology development and well testing), and marine support services. COSL utilizes a diverse fleet of assets, including jack-up, semi-submersible, and land drilling rigs, to deliver specialized technical solutions.

Recent filings

Filing Released Lang Actions
NOTICE OF LISTING ON THE STOCK EXCHANGE OF HONG KONG LIMITED - CNY5,000,000,000 1.95% GUARANTEED NOTES DUE 2029 ISSUED BY COSL SINGAPORE CAPITAL LTD. AND UNCONDITIONALLY AND IRREVOCABLY GUARANTEED BY
Capital/Financing Update Classification · 1% confidence The document is a formal notice regarding the listing of debt securities (guaranteed notes) on the Stock Exchange of Hong Kong. It details the issuer, the guarantor, the principal amount, and the expected effective date of the listing. This falls under the category of financing and capital structure updates, specifically related to debt issuance and listing, which is best classified as CAP (Capital/Financing Update).
2026-03-16 English
2025 ANNUAL RESULTS PRESENTATION
Report Publication Announcement Classification · 1% confidence The document is an announcement regarding the scheduling and logistics of an upcoming 2025 annual results presentation. It does not contain the actual financial results or the full report itself. According to the 'Menu vs Meal' rule, an announcement regarding the timing or publication of a report or presentation is classified as a Report Publication Announcement (RPA).
2026-03-12 English
VOLUNTARY ANNOUNCEMENT - ISSUE OF CNY5,000,000,000 1.95% GUARANTEED NOTES DUE 2029
Capital/Financing Update Classification · 1% confidence The document is a formal announcement by China Oilfield Services Limited regarding the issuance of CNY 5,000,000,000 in guaranteed notes. It details the subscription agreement, principal terms of the notes (interest rate, maturity, redemption clauses), and the intended use of proceeds. This falls under the category of corporate financing and capital structure updates, which is defined as 'Capital/Financing Update' (CAP).
2026-03-10 English
VOLUNTARY ANNOUNCEMENT - PROPOSED ISSUANCE OF GUARANTEED NOTES
Capital/Financing Update Classification · 1% confidence The document is a voluntary announcement by China Oilfield Services Limited regarding the 'Proposed Issuance of Guaranteed Notes'. It details the company's intent to conduct an international offering of debt securities, the proposed use of proceeds for refinancing, and the listing application process. This falls squarely under the definition of a capital or financing update, as it relates to the company's fundraising and capital structure activities.
2026-03-09 English
NOTICE OF BOARD MEETING
Report Publication Announcement Classification · 1% confidence The document is a short announcement (1443 characters) from China Oilfield Services Limited notifying shareholders and the public of an upcoming board meeting to approve annual results and discuss dividends. It does not contain the actual financial results or the report itself, but rather serves as a notification of the event. According to the 'Menu vs Meal' rule, this is a report publication or event announcement, which fits the 'Report Publication Announcement' (RPA) category.
2026-03-05 English
An announcement has just been published by the issuer in the Chinese section of this website, a corresponding version of which may or may not be published in this section.
Regulatory Filings Classification · 1% confidence The document is very short (592 characters) and explicitly states that it is an 'Overseas Regulatory Announcement' regarding the publication of another document on the issuer's website. It does not contain the actual financial report or substantive data, but rather serves as a notification of a filing. Per the 'Menu vs Meal' rule, this is a regulatory announcement/notification, which fits the RNS category.
2026-03-03 English

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