Interim Results Investor Q&A

Costain Group PLC

16 August 2023

Investor Presentation via Investor Meet Company

Interim Results Investor Q&A

Costain Group PLC ("Costain") announces that Alex Vaughan, CEO, and Helen Willis, CFO, will be hosting an investor Q&A session relating to the Interim Results via Investor Meet Company on 24 August 2023 at 10:00am BST.

The Q&A session is open to all existing and potential shareholders. Questions can be submitted pre-event via the Investor Meet Company dashboard up until 9:00am the day before the meeting or at any time during the live presentation.

Investors can sign up to Investor Meet Company for free and add to meet Costain via:

https://www.investormeetcompany.com/costain-group-plc/register-investor

Investors who already follow Costain on the Investor Meet Company platform will automatically be invited.

Costain will issue its results for the six months to 30 June 2023 on 23 August 2023.

Enquiries

Notes to editors

Costain helps to improve people's lives by creating connected, sustainable infrastructure that enables people and the planet to thrive. We shape, create and deliver pioneering solutions that transform the performance of the infrastructure ecosystem across the UK's transport, energy, water, and defence markets.

We are organised around our customers anticipating and solving their challenges and helping to improve performance. By bringing together our unique mix of construction, consulting and digital experts we engineer and deliver sustainable, efficient and practical solutions.