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COSTAIN GROUP PLC — Investor Relations & Filings

Ticker · COST ISIN · GB00B64NSP76 LEI · 213800PKIJBZ2EDTKC88 IL Construction
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Filings indexed 996 across all filing types
Latest filing 2026-06-10 Transaction in Own Shar…
Country GB United Kingdom
Listing IL COST

About COSTAIN GROUP PLC

https://www.costain.com/

Costain Group PLC is an infrastructure solutions company that provides engineering, construction, consulting, and digital services. The company specializes in delivering complex projects and transforming the performance of infrastructure across its core markets: road, rail, integrated transport, energy, water, and defence & nuclear energy. By integrating its diverse expertise, Costain engineers and delivers connected, sustainable solutions designed to address critical national challenges. Its services span the entire asset lifecycle, from initial concept and design to construction, asset optimization, and technology deployment.

Recent filings

Filing Released Lang Actions
Transaction in Own Shares
Transaction in Own Shares Classification · 91% confidence The document is an RNS announcement from Costain Group PLC detailing the number of shares repurchased under its buyback programme, the dates, volumes, prices, and cancellation intention. This matches the definition for a share buyback (“Transaction in Own Shares”).
2026-06-10 English
Holding(s) in Company
Major Shareholding Notification Classification · 95% confidence The document is a TR-1 form (“Standard form for notification of major holdings”) disclosing details of a threshold crossing in share ownership and voting rights. This aligns exactly with major shareholding notifications under DTR. There is no discussion of financial results, management changes, or other corporate events. Therefore, it is classified as a Major Shareholding Notification (MRQ).
2026-06-09 English
Costain wins place on £700m TfL framework
Regulatory Filings Classification · 82% confidence The document is a press release published via RNS announcing that Costain has been selected on a TfL framework. It contains no financial statements, legal notices, voting results, or management changes, and it is not an earnings release, interim/annual report, or presentation. It is a general corporate announcement distributed through the regulatory news service and does not fit any more specific category, making it a Regulatory Filing (RNS).
2026-06-09 English
Transaction in Own Shares
Transaction in Own Shares Classification · 95% confidence The document is a Regulatory News Service (RNS) announcement titled “Transaction in own shares.” It provides detailed daily and aggregated data on Costain Group PLC’s share repurchases under a buyback programme, with volumes, prices, and cancellation intent. This is a classic share buyback report rather than a regulatory filing of a new capital issue or a broader financial report. Accordingly, it fits the “Transaction in Own Shares” category.
2026-06-03 English
Total Voting Rights
Regulatory Filings Classification · 87% confidence The document is an RNS announcement under the FCA’s Disclosure Guidance and Transparency Rule 5.6.1(R) notifying the market of the company’s total issued share capital and voting rights as at a specific date. It does not announce financial results, a report publication, nor does it describe a shareholder crossing thresholds or a share issue; instead, it is a routine regulatory compliance notice. Therefore, it falls under the general “Regulatory Filings” category (RNS).
2026-06-01 English
Group of companies' accounts made up to 2025-12-31
Annual Report Classification · 95% confidence The document is titled “Annual Report and Accounts 2025” and contains extensive sections typical of a full-year corporate annual report: strategic review, governance, chair’s statement, CEO review, sustainability disclosures, full financial statements (income statement, balance sheet, cash flow, notes), and five-year financial summary. It is not an announcement of a report or a certification; it is the full report itself. Therefore it matches the Annual Report category. FY 2025
2026-05-31 English

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