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China Oilfield Services Limited — Investor Relations & Filings

Ticker · 2883 HKEX Mining and quarrying
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Filings indexed 1,859 across all filing types
Latest filing 2026-04-29 Regulatory Filings
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
FINAL DIVIDEND FOR THE YEAR ENDED 31 DECEMBER 2025 (UPDATED)
Regulatory Filings
2026-04-29 English
Proxy Form for 2026 First H Shareholders Class Meeting
Proxy Solicitation & Information Statement Classification · 1% confidence The document is clearly a proxy form for the H Shareholders’ Class Meeting, providing shareholders with voting instructions and a proxy appointment form for resolutions (share buy-back mandates). It is part of materials sent to shareholders to solicit their votes at a meeting, matching the definition of a Proxy Solicitation & Information Statement (PSI).
2026-04-29 English
Proxy Form for 2025 Annual General Meeting
Proxy Solicitation & Information Statement Classification · 1% confidence The document is a proxy form for the 2025 Annual General Meeting enabling shareholders to appoint and instruct a proxy on resolutions. It is part of the materials sent to solicit votes rather than the meeting minutes, results, or the full AGM presentation. Therefore, it falls under Proxy Solicitation & Information Statement (PSI).
2026-04-29 English
NOTICE OF 2025 ANNUAL GENERAL MEETING
Proxy Solicitation & Information Statement Classification · 1% confidence The document is a formal notice of the company’s upcoming Annual General Meeting, including resolutions to be voted on, proxy appointment instructions, meeting venue/date, and related shareholder information. It is not the report itself nor an AGM presentation, but rather proxy solicitation and meeting materials. This aligns with the “Proxy Solicitation & Information Statement” category.
2026-04-29 English
CIRCULAR - FINANCIAL STATEMENTS AND AUDITOR REPORT; FINAL DIVIDEND DISTRIBUTION; THE BOARD REPORT; RE-APPOINTMENT OF AUDIT FIRMS; US DOLLAR LOANS EXTENSION BY WHOLLY-OWNED SUBSIDIARY AND GUARANTEE BY
Regulatory Filings
2026-04-29 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 a brief notice titled “Overseas Regulatory Announcement” by China Oilfield Services on the issuer’s website, with no substantive financial content, report detail, or attachments. It serves as a general regulatory notice without fitting any specific category, making it a fallback regulatory filing.
2026-04-22 English

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