Costain Group Ownership

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

Recent Insider Transactions

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 5JY?
Owner Type	Number of Shares	Ownership Percentage
Public Companies	487,466	0.177%
Individual Insiders	827,985	0.301%
Private Companies	1,541,868	0.56%
Employee Share Scheme	4,104,840	1.49%
VC/PE Firms	23,543,208	8.55%
Institutions	244,982,119	88.9%

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

Top Shareholders

Top 25 shareholders own 84.81% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
11.6%	UBS Asset Management AG	31,684,146	€46.4m	1,810%	no data
8.64%	Gresham House Asset Management Limited	23,543,208	€34.5m	-0.52%	1.87%
7.84%	Hargreaves Lansdown Asset Management Ltd.	21,382,389	€31.3m	-5.28%	0.08%
5.82%	Ennismore Fund Management Limited	15,853,406	€23.2m	-25.4%	6.5%
5.54%	Amundi Asset Management SAS	15,104,034	€22.1m	-19.3%	no data
5.29%	BlackRock, Inc.	14,412,589	€21.1m	-8.53%	no data
5.1%	Aberdeen Group Plc	13,902,836	€20.4m	-8.46%	0.01%
5.07%	J O Hambro Capital Management Limited	13,821,863	€20.3m	-5.87%	0.18%
4.92%	Perpetual Limited	13,408,080	€19.6m	0%	0.35%
3.25%	Artemis Investment Management LLP	8,858,419	€13.0m	29.2%	0.05%
2.39%	HBOS Investment Fund Managers Limited	6,502,835	€9.5m	-3.34%	0.07%
2.15%	Fidelity International Ltd	5,864,907	€8.6m	-45.1%	no data
2.13%	Barclays Bank PLC, Wealth and Investment Management Division	5,817,196	€8.5m	-9.89%	0.07%
1.97%	Acadian Asset Management LLC	5,381,104	€7.9m	47.7%	0.02%
1.66%	Premier Fund Managers Ltd.	4,527,843	€6.6m	15.5%	0.09%
1.57%	Legal & General Investment Management Limited	4,273,660	€6.3m	4.44%	no data
1.51%	Costain Group, Employee Trust	4,104,840	€6.0m	-0.06%	no data
1.21%	Charles Stanley & Co. Ltd, Asset Management Arm	3,310,525	€4.9m	-1.08%	0.04%
1.17%	Dimensional Fund Advisors LP	3,182,793	€4.7m	-3.68%	no data
1.12%	Goldman Sachs Group, Investment Banking and Securities Investments	3,063,406	€4.5m	-39.4%	no data
1.07%	Stonehage Fleming (Uk) Limited	2,920,786	€4.3m	-18.2%	0.14%
1.04%	Morgan Stanley, Investment Banking and Brokerage Investments	2,828,421	€4.1m	15.1%	no data
1.01%	F Van Lanschot Bankiers NV, Asset Management Arm	2,763,036	€4.0m	0%	0.97%
0.86%	Teviot Partners LLP	2,335,000	€3.4m	1.17%	1.66%
0.85%	HSBC Global Asset Management (UK) Limited	2,312,189	€3.4m	-3.36%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2025/05/23 10:54
End of Day Share Price	2025/05/23 00:00
Earnings	2024/12/31
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

Costain Group PLC is covered by 12 analysts. 5 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
Edward Hugh Prest	Berenberg
Maximillian Hayes	Cavendish
David Buxton	Cavendish