Sustainability Report

Overview

The report covers Costain Group's 2025 performance, highlighting a 41% year-on-year emissions reduction and restated historic GHG data. It reports 175,078 tCO2e total emissions, including 166,965 tCO2e Scope 3, and describes a value-chain net-zero pathway reaching 2045. It also highlights 7,500 volunteering hours and 20,000 people reached through the C160 campaign.

Document

Report type: Sustainability Report
Class: Dedicated
Scope: Full report
Fiscal year: 2025
Period: 1 January 2025 – 31 December 2025
Publication date: 2 April 2026
Language: English
Pages
File size
Restatement: Disclosed

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Standards

GRI
SASB
TCFD
ISSB
ESRS
Integrated Reporting Framework
GHG Protocol
EU Taxonomy
CDP

Commitments

UN Global Compact
UN Guiding Principles
Science Based Targets initiative

Ratings

GRI level
SBTi status
CDP score

Materiality

Assessment
Basis

Assurance

Provider
Level
Standard
Scope
Statement included
Metrics assured

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