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View Thamesgate Group's top competitors like Anglian Water Services, Buro Happold, and O2 (Telefónica UK).

O2 (Telefónica UK)
O2 is the commercial brand of Telefónica UK Limited and is a leading digital communications company with the highest customer satisfaction for any mobile provider according to Ofcom. With over 23 million customers, O2 runs 2G, 3G, 4G and 5G networks across the UK, as well as operating O2 Wifi and owning half of Tesco Mobile. O2 has over 450 retail stores and sponsors The O2, O2 Academy venues and the England rugby team. Read more about O2 at http://www.o2.co.uk/news. We believe that by thinking big we will create new possibilities for people and the planet. If you believe anything is possible and if you like to make things happen, then this is the place.
UK
Private
$7.3B Revenue
http://www.o2.co.uk/
5.4K Employees
Thames Water
Thames Water is the UK’s biggest water and wastewater services provider, providing 2.7 billion litres of drinking water and safely removing 4.6 billion litres of wastewater every day. Our people provide essential services around the clock to c.16 million customers across London, the Thames Valley, and surrounding areas. In 2025, we started the biggest upgrade to our network in 150 years, which will see a record-breaking investment of over £20 billion, fixing leaks, reducing pollution and protecting water quality, over the next five years. In 2024/25, we invested £2.2 billion, and we will continue to spend wisely on improving resilience, service, and efficiency, as well as provide more support for customers in vulnerable circumstances. We also have additional responsibilities to society and the natural environment. What we do and how we do it delivers significant public value, which is why we have ambitious plans to self-generate more of our own power, reduce our carbon emissions and increase biodiversity across our sites.
UK
Private
$3.2B Revenue
http://www.thameswater.co.uk
7K Employees
Buro Happold
We are an international, integrated consultancy of engineers,designersand advisers. For over 45 years, we have built an unrivalled reputation by delivering creative, value-led solutions for the benefit of people, places and planet. Described by our clients as 'passionate', 'innovative' and 'collaborative', Buro Happold is synonymouswith the delivery of exceptionally complex projects on every continent, working with the world's leading architectural practices and organisations, such as the United Nations, UNESCO and C40 Cities. Through our global community of driven, world-leading engineering, advisory and design professionals, we are acting to address major challenges in an ever-evolving world.
Bath, GB
Private
$634M Revenue
http://www.burohappold.com
3.8K Employees
G2 Leader Summer 2026 G2 Best Est ROI Mid-Market Summer 2026 G2 Easiest Admin Mid-Market Summer 2026 G2 Most Implementable Summer 2026 G2 Best Results Mid-Market Summer 2026 G2 Lead Capture Mid-Market Summer 2026 Inc Fastest Growing Private Companies 2026 Inc Best Workplace 2026
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