In 2025, the UK investment market has experienced a string of down rounds, including from The Hut Group and Atom Bank, whilst the stock trading app Freetrade, which saw its value slashed by 65% in 2023, recently exited by acquisition.

This article examines which companies are bucking these trends and securing the highest valuations.

Top 10 most valuable UK companies

10. Paddle

Incorporated: 2012
Location: Islington
Industry: Payment processing
Latest post-money valuation: £941m

Paddle is a payment software provider that supports businesses with invoicing, payment processing, currency exchange, and customer analytics.

Since 2013, the company has raised £252m across eight equity fundraisings. Its most recent round in July 2025 raised $25.0m from CIBC Innovation Banking and other investors, while a $200m round in May 2022 set a post-money valuation of £941m.

In 2023, it reported turnover of £57.3m, up from £49.0m the previous year.

09. Zopa

Incorporated: 2017
Location: Southwark
Industry: Banking
Latest post-money valuation: £987m

Zopa operates a digital bank offering services such as personal loans, credit cards, and car financing.

Since 2006, the company has raised £805m across 16 equity fundraisings. Its latest round in March 2025 secured £80.0m from undisclosed investors, setting a post-money valuation of £987m. Earlier fundraisings include £220m in 2021, backed by SoftBank Vision Fund and Augmentum Fintech, and £140m in 2020.

In 2024, the business reported turnover of £299m, up from £224m in 2023.

08. LNT Care Developments

Incorporated: 2021
Location: Leeds
Industry: Property development and construction
Latest post-money valuation: £1.18b

LNT Care Developments operates across the care sector, spanning construction and development of care homes alongside the management of individual centres. The company also runs divisions in motorsport and weather protection product development.

In July 2025, it raised £98.6m from undisclosed investors, setting a post-money valuation of £1.18b.

07. Quantexa

Incorporated: 2016
Location: Tower Hamlets
Industry: Risk and compliance
Latest post-money valuation: £1.30b

Quantexa develops an AI-powered software platform that provides data management and risk analysis services.

Since 2017, the company has raised £421m across six equity fundraisings. Its latest round in March 2025 raised $175m, backed by AlbionVC, British Patient Capital, and Teachers’ Venture Growth, giving the company a post-money valuation of £1.30b.

In 2024, Quantexa reported turnover of £76.1m, up from £57.9m in 2023.

06. Isomorphic Labs

Incorporated: 2021
Location: Tower Hamlets
Industry: Biotechnology
Latest post-money valuation: £1.39b

Isomorphic Labs develops a drug design platform that uses AI models to support pharmaceutical development.

The company spun out from Google in February 2021 and is wholly owned by Isomorphic Holdings LLC. In March 2025, it raised $600m in a round backed by Alphabet, GV (Google Ventures), and Thrive Capital, giving it a post-money valuation of £1.39b.

05. Synthesia

Incorporated: 2017
Location: Camden
Industry: Marketing, branding, and advertising
Latest post-money valuation: £1.45b

Synthesia develops AI technology that enables businesses to generate video content by modelling the human face in motion.

A spinout from University College London in 2018, the company has raised £266m across seven equity fundraisings. Its most recent round in December 2024 raised £146m, backed by Atlassian Ventures, Firstmark Capital, GV (Google Ventures), MMC Ventures, NEA, PSP Growth, and World Innovation Lab, setting a post-money valuation of £1.45b.

In 2023, Synthesia reported turnover of £25.7m

04. CMR Surgical

Incorporated: 2014
Location: South Cambridgeshire
Industry: Robotics
Latest post-money valuation: £1.92b

CMR Surgical develops robotic medical devices for use in surgical procedures and also provides a surgical data platform.

Since 2014, the company has raised over £1.03b across nine equity fundraisings. Its most recent round in April 2025 raised £154m, backed by Ally Bridge Group, LGT Capital Partners, Lightrock, SoftBank Vision Fund, Tencent, and Trinity Capital, giving the company a post-money valuation of £1.92b.

03. Wayve

Incorporated: 2017
Location: Islington
Industry: Autonomous vehicles
Latest post-money valuation: £2.22b

Wayve develops software for self-driving cars, using artificial intelligence and machine learning to support autonomous vehicle systems.

Since 2017, the company has raised £1.01b across seven equity fundraisings. Its latest round in February 2024 secured $1.05b, backed by M12, NVIDIA, and SoftBank Vision Fund, giving the company a post-money valuation of £2.22b.

02. Inspired

Incorporated: 2016
Location: Westminster
Industry: Schools
Latest post-money valuation: £2.88b

Inspired operates a global group of independent private schools. Since 2016, the company has raised £493m across six equity fundraisings.

Recent activity includes a small round in May 2024, while earlier raises include €150m in 2022 backed by Stonepeak Infrastructure Partners, and €240m in 2019 supported by TA Associates and Warburg Pincus. Inspired’s most recently reported post-money valuation is £2.88b.

In 2024, Inspired reported turnover of £931m, up from £720m in 2023.

01. Cityfibre

Incorporated: 2018
Location: Westminster
Industry: Telecommunications infrastructure
Latest post-money valuation: £3.00b

CityFibre installs fibre optic infrastructure for communications across the UK. The company listed on AIM in 2014, raising £16.6m at admission.

Since then, it has secured £2.02b across five equity fundraisings. Its most recent round in June 2025 raised £500m, backed by Antin Infrastructure Partners, Goldman Sachs Alternatives, Interogo, and Mubadala Investment Company, giving the company a post-money valuation of £3.00b.

Advice from GS Verde Group

At GS Verde Group, we help businesses achieve value and long-term success by offering corporate advisory expertise all under one roof.

Our corporate finance team work together with our tax, accountancy and legal experts under one roof to provide a low risk, thorough valuation and due diligence process so that clients can achieve long-term growth with clarity and confidence.

Find out how our corporate finance team can help enhance your business’s valuation:

Welcome to GS Verde Corporate Finance

To find out more about the UK’s most valuable companies, visit:
The Top 10 Most Valuable UK Companies in 2025