China Oilfield Services Limited
China Oilfield Services Limited is number 992 in the 311 Titans Index of the world's largest companies, with reported revenue of about $7.0bn in 2025. It is headquartered in Tianjin, China.
Part of the 311 Titans Index (311institute.com). Last updated .
Ownership
China Oilfield Services Limited is a listed subsidiary: its largest shareholder, 中国海洋石油集团有限公司, holds 50.86% (as of 2026-06-30). Some of its revenue may also be counted in its parent group's total.
Other Titans in China
- PetroChina Company Limited (#9)
- China Petroleum and Chemical Corporation (#10)
- China State Construction Engineering Corporation Limited (#15)
- JD.com, Inc. (#33)
- China State Railway Group (#34)
- China Railway Group Limited (#38)
- China Mobile Limited (#41)
- Alibaba Group (#42)
- China Railway Construction Corporation Limited (#43)
- Foxconn Industrial Internet Co., Ltd (#49)
- Tencent Holdings Limited (#59)
- China Communications Construction Company Limited (#63)
- Xiamen C and D Inc. (#73)
- SAIC Motor Corporation Limited (#74)
- Power Construction Corporation of China, Ltd. (#75)
- BYD Company (#91)
- Wuchan Zhongda Group Co., Ltd. (#93)
- Shandong Weiqiao Pioneering Group (#94)
- Jiangxi Copper Company Limited (#99)
- China Telecom Corporation Limited (#106)
- Midea Group Co., Ltd. (#116)
- Metallurgical Corporation of China Ltd. (#118)
- China Energy Engineering Corporation Limited (#120)
- Contemporary Amperex Technology Co., Limited (#132)
- Xiamen Xiangyu Co., Ltd. (#136)
- CNOOC Limited (#139)
- China United Network Communications Limited (#144)
- Meituan (#157)
- Zijin Mining Group Co., Ltd. (#159)
- Xiamen ITG Group Corp., Ltd. (#163)
Related
Questions and answers
How big is China Oilfield Services Limited?
China Oilfield Services Limited reported revenue of about $7.0bn in 2025, ranking number 992 in the 311 Titans Index.
Where is China Oilfield Services Limited headquartered?
China Oilfield Services Limited is headquartered in Tianjin, China.
Source: official filing (filing), retrieved 5 October 2026. Revenue converted to US dollars at the ECB average rate for the financial year.
© 311 Institute 2026. Facts from official filings, Wikidata (CC0) and the sources linked on this page. The selection, classification and links are the proprietary work of the 311 Institute, protected by copyright and database rights.