All Rankings

Top Series B Companies in the UK 2026

Private companies headquartered in the United Kingdom whose latest recorded round was Series B, ranked by disclosed lifetime funding.

Known total funding for 100 of 100 ranked companies: $14.2B.

Showing top 100 matching companies · Ranked by total funding raised

Use company data through the API.
Example request
curl "https://indexed.vc/api/v1/companies?countries=United+Kingdom&operatingStatus=active&sort=total_funding_raised&order=desc&limit=100" -H "X-API-Key: YOUR_API_KEY"

The API has no funding stage filter, so this includes every stage, not only Series B.

The API has no company type filter, so public companies can appear; this list counts private companies only.

The API cannot leave out companies whose latest round is a grant; this list does.

Data from Indexed.vcUpdated

Methodology: up to 100 active companies matching this list's filters are ordered by disclosed total funding in USD. Companies whose latest round is one of: Grant are excluded. Totals include recorded grants and other qualifying funding, not just equity. Open a company profile for its funding summary and available detail. How this data is built.

51
Causaly

Causaly is an AI platform for life sciences research that enables scientists to rapidly discover ...

London, United Kingdom51–200Artificial Intelligence, Biotech
Series BTotal funding$78.0MJul 2023
52
Navro

Navro helps businesses smoothly navigate their growth into foreign markets by providing them with...

London, United Kingdom51–200Fintech, Payments
Series BTotal funding$76.7MApr 2025
53
Ieso Digital Health

Digital mental health company delivering online CBT therapy; rebranded as Mindler in August 2025 ...

Cambridge, United Kingdom51–200Healthcare, SaaS
Series BTotal funding$76.5MNov 2021
54
Superscript

UK insurtech broker offering flexible, digital-first insurance products for SMEs, sole traders, a...

London, United Kingdom51–200Fintech, Insurtech
Series BTotal funding$75.2MJan 2023
55
Omnea

Omnea is the agentic operating system for procurement, helping teams surface savings they couldn'...

London, United Kingdom51–200Artificial Intelligence
Series BTotal funding$75.0MSep 2025
56
Forest

Forest offers shared electric bikes across London through an app, with pay-as-you-go rides, prepa...

London, United Kingdom11–50Hardware, Mobility
Series BTotal funding$72.9MApr 2026
57
Orca AI

Orca AI is on a mission to empower shipping with data-driven technologies and automation for navi...

London, United Kingdom51–200Artificial Intelligence, Insurtech
Series BTotal funding$72.5MMay 2025
58
Addionics

Addionics develops Smart 3D Porous Current Collectors, a battery platform technology designed for...

London, United Kingdom11–50Climate Tech
Series BTotal funding$72.0MJul 2024
59
Cyted

Cyted provides non-endoscopic diagnostics that combine minimally invasive cell collection with mo...

Cambridge, United Kingdom11–50Biotech, Healthcare
Series BTotal funding$71.8MAug 2025
60
Lifebit Biotech

LifeBit enables companies to do DNA analysis at scale.

London, United Kingdom51–200Artificial Intelligence, Data & Analytics
Series BTotal funding$70.8MSep 2021
61
Aave

Aave is a decentralised non-custodial liquidity protocol where suppliers earn interest and borrow...

London, United Kingdom51–200DeFi, Crypto & Web3
Series BTotal funding$70.7MOct 2021
62
Speechmatics

Deep learning and speech recognition experts

Cambridge, United Kingdom51–200Artificial Intelligence, Natural Language Processing
Series BTotal funding$70.0MJun 2022
63
FINBOURNE

Investment data management platform

London, United Kingdom201–500Fintech, SaaS
Series BTotal funding$70.0MJun 2024
64
Hack The Box

Hack The Box is an AI-powered cybersecurity upskilling and readiness platform trusted by 1,500+ o...

Folkestone, United Kingdom201–500Cybersecurity
Series BTotal funding$69.5MJan 2023
65
Artificial Labs

Provides digital underwriting and placement technology for insurance carriers and brokers, simpli...

London, United Kingdom51–200Artificial Intelligence, Insurance
Series BTotal funding$67.9MFeb 2026
66
Robin AI

AI-powered contract software and legal services for enterprise contract review and management.

London, United Kingdom11–50Artificial Intelligence, SaaS
Series BTotal funding$67.5MNov 2024
67
Orbital Industries

Uses an AI platform to design and commercialize advanced materials and climate technologies for i...

London, United Kingdom11–50Advanced Manufacturing, Artificial Intelligence
Series BTotal funding$66.0MMay 2026
68
RedSift

Open cloud platform for real-time data processing.

London, United Kingdom51–200Cybersecurity, SaaS
Series BTotal funding$64.8MFeb 2022
69
PQShield

PQShield is a post-quantum cryptography company providing quantum-safe security solutions across ...

Oxford, United Kingdom51–200Cybersecurity
Series BTotal funding$64.0MJun 2024
70
Sharegain

Securities Lending as a Service (SLaaS) fintech enabling retail-facing financial institutions to ...

London, United Kingdom51–200Fintech
Series BTotal funding$64.0MFeb 2022
71
SatVu

Space tech company providing high-resolution thermal satellite imagery and video for sustainabili...

London, United Kingdom11–50Climate Tech, Space Tech
Series BTotal funding$63.6MFeb 2026
72
FabricNano

Transforms industrial chemical processes into cell-free biomanufacturing using enzymatic catalysi...

London, United Kingdom1–10Biotech, Synthetic Biology
Series BTotal funding$62.5MSep 2022
73
Allplants

Plant-based meal delivery company offering natural, ready-in-minutes meals available at major UK ...

London, United Kingdom1–10E-Commerce
Series BTotal funding$61.9MOct 2021
74
Amphista Therapeutics

Develops targeted protein degradation medicines for serious diseases.

Cambridge, United Kingdom51–200Biotech, Healthcare
Series BTotal funding$60.5MMar 2021
75
Unify.ai

LLM routing platform that helps developers find and access the best AI model for any task via a u...

London, United Kingdom1–10Artificial Intelligence, Developer Tools
Series BTotal funding$58.6MMay 2025