Directory

Aroundtown

CorporateReal EstateForeign

Aroundtown SA is a publicly listed real estate company, registered in Luxembourg and operationally headquartered in Berlin, focused on income-generating commercial and residential properties with value-add potential in central locations across top-tier European cities. Founded in 2004, the company is one of the largest commercial real estate operators in Europe and is listed on the Frankfurt Stock Exchange as a component of the MDAX index. Its portfolio spans properties primarily in Germany and the Netherlands.

Arqit Quantum

ScaleupCybersecurityQuantumBritish

Quantum-safe encryption company providing symmetric key agreement and Encryption Intelligence cryptographic discovery/migration tooling to help organisations transition to post-quantum cryptography; listed on Nasdaq (ARQQ).

Arrival

StartupFinanceProptechBritish

Set up your new home in under 3 minutes. We combine electricity, gas, water and council tax into one simple monthly payment.

Artificial

ScaleupFinanceAIBritish

Artificial Labs builds digital broking and underwriting technology for the specialty and commercial insurance market, headquartered in London and backed by a $45M Series B round closed in 2026.

Artificial Societies

StartupAIBritish

Synthetic-persona simulation platform: builds networks of AI personas to simulate how target audiences respond to campaigns, products and messaging.

Artsect

CommunityCrypto & Web3British

ArtSect Gallery - London's leading NFT gallery and decentralized arts organisation. Curating immersive NFT exhibitions, digital art, and blockchain art in Hackney Wick and across the UK.

Arāya Sie Fund

VCFinanceAIBritish

Joint pre-seed/seed VC fund by Arāya Ventures and Sie Ventures backing women-led startups in healthcare, fintech, deeptech, and climate across the UK and Europe.

Arāya Ventures

VCFinanceAIBritish

London-based early-stage venture capital firm founded in 2022, investing pre-seed and seed across AI, healthtech, fintech, commerce, and future of work.

Asana

CorporateSaaSForeign

Work management software for teams and AI agents. Plan, automate, and execute critical workflows together.

Ascension

VCSaaSAIBritish

Ascension is a London-based pre-seed and seed-stage venture capital firm, founded in 2015, that backs ambitious technology founders across the UK, Europe, and North America. It is one of the most active seed-stage investors in London and invests through generalist and thesis-driven funds, including impact-focused vehicles targeting social inequality and the cost of living crisis. The firm has backed over 300 portfolio companies since inception.

Ashurst

Professional ServicesLegalBritish

Ashurst is a British multinational law firm headquartered in London, founded in 1822, with over 2,800 employees across 30 offices in 18 countries. The firm specialises in mergers and acquisitions, corporate and structured finance, investment funds, energy, infrastructure, and dispute resolution, serving corporates, financial institutions, and governments globally. As of 2026, Ashurst and Perkins Coie have voted to merge, creating a combined firm of approximately 3,000 attorneys.

Aspirity Partners

PEFinanceAIBritish

London-based pan-European private equity firm targeting growth buyouts in Financial Technology & Services and Enterprise Technology & Connectivity Services, investing €50–150m per deal.

Aspora

StartupFinanceBritish

Send money to India at Google-matching rates, lowest fees, transparent and instant transfers. Aspora is the trusted global finance app built for the Indian diaspora

Astellas Pharma Inc.

CorporateBiotech & Life SciencesDeep TechForeign

Astellas Pharma is a Japanese multinational pharmaceutical company focused on oncology, urology, immunology, and rare diseases, with a significant UK clinical and commercial presence.

Asterix Health

StartupBiotech & Life SciencesSaaSBritish

London healthtech connecting GMC-registered remote GPs to NHS primary care practices via its DoctorOS platform, raising £2.1m pre-seed in 2026.

AstronauTx

ScaleupBiotech & Life SciencesDeep TechBritish

Develops small-molecule therapeutics for Alzheimer's disease and neurodegeneration by restoring astrocyte function and correcting disrupted brain physiology.

Astronomer

ScaleupAISaaSForeign

Apache Airflow® orchestrates the world’s data, ML, and AI pipelines. Astro is the best way to build, run, and observe them at scale.

Atheni

StartupAISaaSBritish

London-based AI adoption platform delivering personalised, role-specific guidance to help businesses embed tools like ChatGPT, Claude, and Copilot into daily workflows.

Atla AI

StartupAIBritish

Evaluation and improvement layer for AI agents; builds LLM-judge models that automatically detect, diagnose and fix agent failures. YC S23 company.

Atlantic Bridge

VCAIDefenceForeign

Atlantic Bridge is a global growth equity technology firm with over €1.2 billion of assets under management across eight funds. The firm invests in deep technology companies in Europe, the UK and the United States, with a cross-border value-add strategy and offices in Dublin, London, Munich, Paris and Palo Alto.

Atlassian

CorporateSaaSForeign

Atlassian is a global enterprise software company founded in Sydney, Australia in 2002, best known for its collaboration and developer tooling products including Jira, Confluence, Trello, and Bitbucket. It serves hundreds of thousands of organisations worldwide and is publicly listed on Nasdaq (TEAM). The company has a UK registered office in London and operates globally across more than a dozen countries.

Atlassian Ventures

CorporateSaaSAIForeign

Corporate venture arm of Atlassian investing $1–5M in seed-to-Series B enterprise software and SaaS startups building on or alongside the Atlassian platform.

Atomico

VCAIFinanceBritish

Atomico is a founder-built European venture capital firm, founded in 2006 and headquartered in London. The firm invests in ambitious technology entrepreneurs across Europe and beyond, with a focus on areas including digital infrastructure, enterprise AI, frontier tech, fintech, medtech and climate. It has backed companies such as Klarna, DeepL and Hinge Health.

Attio

ScaleupSaaSAIBritish

The system for revenue teams to build pipeline, accelerate deals, and grow accounts around the clock.