China Oilfield Services Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

DB:CO9 Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
09 Apr 25	Sell€2,859,874	Fidelity International Ltd	Company	4,540,000	€0.63
28 Feb 25	Buy€915,215	BlackRock, Inc.	Company	1,151,960	€0.79
18 Feb 25	Sell€2,320,657	Fidelity International Ltd	Company	2,852,000	€0.81
16 Dec 24	Sell€927,148	Fidelity International Ltd	Company	1,120,000	€0.83
14 Nov 24	Sell€2,373,172	BlackRock, Inc.	Company	2,711,640	€0.88
14 Oct 24	Sell€2,284,175	BlackRock, Inc.	Company	2,653,544	€0.86
12 Sep 24	Buy€953,797	Fidelity International Ltd	Company	1,310,000	€0.73
11 Sep 24	Sell€1,421,386	Fidelity International Ltd	Company	1,882,000	€0.76
05 Sep 24	Buy€40,672	Fidelity International Ltd	Company	52,000	€0.78
02 Sep 24	Sell€152,051	Fidelity International Ltd	Company	182,000	€0.84
29 Aug 24	Buy€887,852	Fidelity International Ltd	Company	1,058,000	€0.84
19 Jul 24	Sell€1,037,086	Fidelity International Ltd	Company	1,274,000	€0.81
14 May 24	Buy€4,018,781	BlackRock, Inc.	Company	3,920,000	€1.03

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of CO9?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	19,300	0.000404%
Institutions	1,069,410,347	22.4%
General Public	1,291,313,053	27.1%
Private Companies	2,410,849,300	50.5%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 69.96% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
50.5%	China National Offshore Oil Corporation	2,410,849,300	€3.1b	0%	no data
3.75%	Fidelity International Ltd	178,716,000	€230.3m	-9.93%	0.06%
2.89%	China Securities Finance Corp, Asset Management Arm	137,982,876	€177.8m	0%	0.31%
2.43%	BlackRock, Inc.	115,916,337	€149.3m	-2.69%	no data
1.69%	The Vanguard Group, Inc.	80,722,531	€104.0m	0.79%	no data
1.36%	Hermes Investment Management Limited	65,036,000	€83.8m	0%	0.32%
0.71%	Fullgoal Fund Management Co. Ltd.	33,746,900	€43.5m	0%	0.08%
0.7%	Harvest Fund Management Co. Ltd.	33,378,353	€43.0m	0%	0.07%
0.6%	Penghua Fund Management Co., Ltd.	28,418,732	€36.6m	0%	0.18%
0.58%	Dimensional Fund Advisors LP	27,908,934	€36.0m	2.33%	no data
0.55%	JPMorgan Chase & Co, Brokerage and Securities Investments	26,236,988	€33.8m	0%	0.01%
0.49%	Zheshang Fund Management Co., Ltd.	23,275,700	€30.0m	0%	1.67%
0.44%	JP Morgan Asset Management	21,172,153	€27.3m	-0.21%	no data
0.4%	Norges Bank Investment Management	18,876,278	€24.3m	0%	no data
0.39%	T. Rowe Price Group, Inc.	18,530,674	€23.9m	-48.5%	no data
0.34%	Allianz Asset Management GmbH	16,346,000	€21.1m	0%	0.01%
0.3%	Zhong Ou Fund Management Co., Ltd	14,226,705	€18.3m	0%	0.1%
0.29%	China Universal Asset Management Company Ltd.	13,776,661	€17.7m	0%	0.05%
0.27%	JOHCM (USA) Inc	12,728,384	€16.4m	0%	0.16%
0.25%	China Merchants Fund Management Company Ltd.	12,087,976	€15.6m	11.3%	0.08%
0.25%	E Fund Management Co., Ltd.	11,765,076	€15.2m	-3.59%	0.01%
0.21%	Huatai-PineBridge Fund Management Co., Ltd.	10,229,400	€13.2m	-7.85%	0.03%
0.19%	Pictet Asset Management Limited	8,885,000	€11.4m	0%	no data
0.18%	Geode Capital Management, LLC	8,823,672	€11.4m	1.52%	no data
0.18%	Tianhong Asset Management Co., Ltd.	8,432,486	€10.9m	0%	0.08%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2025/05/07 23:12
End of Day Share Price	2025/05/07 00:00
Earnings	2025/03/31
Annual Earnings	2024/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

China Oilfield Services Limited is covered by 54 analysts. 10 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Clement Chen	Barclays
Yong Liang Por	BNP Paribas Securities (Asia)
Cho Ming Lau	BOCI Research Ltd.