China Oilfield Services Ownership

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

Recent Insider Transactions

SEHK:2883 Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
27 Oct 25	BuyHK$13,193,857	Fidelity International Ltd	Company	1,836,000	HK$7.19
10 Oct 25	BuyHK$6,542,211	Invesco Ltd.	Company	940,000	HK$6.96
09 Apr 25	SellHK$24,510,109	Fidelity International Ltd	Company	4,540,000	HK$5.40
28 Feb 25	BuyHK$7,406,182	BlackRock, Inc.	Company	1,151,960	HK$6.43
18 Feb 25	SellHK$18,874,256	Fidelity International Ltd	Company	2,852,000	HK$6.62
16 Dec 24	SellHK$7,573,104	Fidelity International Ltd	Company	1,120,000	HK$6.76
14 Nov 24	SellHK$19,538,999	BlackRock, Inc.	Company	2,711,640	HK$7.21

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 2883?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	19,300	0.000404%
Institutions	1,141,692,682	23.9%
General Public	1,203,022,718	25.2%
Private Companies	2,426,857,300	50.9%

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

Top Shareholders

Top 25 shareholders own 72.15% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
50.9%	China National Offshore Oil Corporation	2,426,857,300	HK$31.7b	0.66%	no data
3.8%	Fidelity International Ltd	181,230,000	HK$2.4b	1.41%	0.06%
2.89%	China Securities Finance Corporation Limited	137,982,876	HK$1.8b	0%	0.31%
2.64%	BlackRock, Inc.	125,824,425	HK$1.6b	4.59%	no data
1.91%	Invesco Ltd.	91,284,000	HK$1.2b	0%	0.02%
1.78%	The Vanguard Group, Inc.	84,716,631	HK$1.1b	1.65%	no data
1.37%	Hermes Investment Management Limited	65,538,000	HK$856.0m	0%	0.4%
0.79%	Dimensional Fund Advisors LP	37,724,934	HK$492.7m	3.66%	0.01%
0.71%	Fullgoal Fund Management Co. Ltd.	33,746,900	HK$440.8m	0%	0.08%
0.69%	Harvest Fund Management Co. Ltd.	32,838,353	HK$428.9m	-1.01%	0.07%
0.62%	JPMorgan Chase & Co.	29,710,988	HK$388.1m	0%	no data
0.53%	Penghua Fund Management Co., Ltd.	25,069,732	HK$327.4m	0%	0.14%
0.49%	Zheshang Fund Management Co., Ltd.	23,275,700	HK$304.0m	0%	1.85%
0.44%	JP Morgan Asset Management	21,171,268	HK$276.5m	0.06%	no data
0.41%	Norges Bank Investment Management	19,448,587	HK$254.0m	3.03%	no data
0.3%	Zhong Ou Fund Management Co., Ltd	14,226,705	HK$185.8m	0%	0.09%
0.29%	China Universal Asset Management Company Ltd.	13,663,361	HK$178.5m	0%	0.05%
0.27%	China Merchants Fund Management Company Ltd.	13,038,776	HK$170.3m	4.57%	0.09%
0.26%	E Fund Management Co., Ltd.	12,242,776	HK$159.9m	6.48%	0.01%
0.21%	Huatai-PineBridge Fund Management Co., Ltd.	10,229,400	HK$133.6m	0%	0.03%
0.2%	JOHCM (USA) Inc	9,402,288	HK$122.8m	-1.51%	0.16%
0.18%	Geode Capital Management, LLC	8,784,128	HK$114.7m	1.4%	no data
0.18%	Goldman Sachs Asset Management, L.P.	8,473,319	HK$110.7m	0%	no data
0.18%	Tianhong Asset Management Co., Ltd.	8,432,486	HK$110.1m	0%	0.07%
0.17%	National Council for Social Security Fund	8,000,038	HK$104.5m	0%	0.01%

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2025/11/07 02:29
End of Day Share Price	2025/11/07 00:00
Earnings	2025/09/30
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 43 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
Yiming Wang	BofA Global Research
Kin Wing Fung	China Galaxy International Securities (Hong Kong)