Summary
UK-based Luminance secured $40 million in Series B funding, bringing total funding to $90 million at the time. The investment accelerated development of the company's Legal Pre-trained Transformer model trained on 150 million legal documents.
Legal AI company Luminance raised $40 million in Series B funding in April 2024, accelerating development of its specialized contract AI platform.
Funding details:
- Amount: $40 million Series B
- Previous funding: $50 million prior to this round
- Total at time of round: $90 million
- Subsequent raise: $75 million Series C in February 2025, bringing total to $165 million
Technical differentiation: Luminance's core technology is the Legal Pre-trained Transformer (LPT), a proprietary AI model designed specifically for legal work:
- Trained on more than 150 million verified legal documents
- Many training documents are not publicly available
- Understands over 80 languages
- Uses "Panel of Judges" architecture for contract analysis
Product capabilities:
- Contract Generation: Drafting new agreements
- Contract Review: Identifying risks and issues
- Contract Negotiation: Tracking redlines and changes
- Post-Execution Analysis: Portfolio-wide analytics
Company background: Founded in 2015 by Cambridge academics Adam Guthrie and Dr. Graham Sills, Luminance was seed-funded by the late Dr. Mike Lynch, founder of Autonomy. The company has grown to serve more than 700 clients across 70+ countries.
Notable clients include:
- AMD
- Hitachi
- LG Chem
- SiriusXM
- Rolls-Royce
- Lamborghini
Strategic expansion: The Series B funding supported:
- Madrid office opening in Europe
- NTT DATA adoption across 10 European countries
- Continued development of LPT model capabilities
The funding positioned Luminance as one of the best-capitalized specialized legal AI companies in Europe, setting the stage for the subsequent $75 million Series C round.