A UK company that owns what it operates.
PureTensor Ltd is the infrastructure company: it owns the NVIDIA Blackwell-generation compute estate, operates it in the United Kingdom, and delivers managed AI services to regulated British organisations. It is founder-led and founder-funded.
The company was incorporated in January 2026 (initially under the name Varangian Group Ltd, renamed PureTensor Ltd in March 2026 when the brand was consolidated). Its sole director and controlling shareholder is the founder, Heimir Helgason.
Registered details
- Legal name
- PureTensor Ltd
- Registered in
- England and Wales
- Company number
- 16957867
- VAT number
- GB 514 7995 57
- Office
- 2 Portman Street, Marylebone, London W1
- Registered office
- 71-75 Shelton Street, Covent Garden, London WC2H 9JQ
- Incorporated
- January 2026
- Operations
- United Kingdom (Thames Valley data corridor)
- Disaster recovery
- Iceland
Entity structure
PureTensor Ltd and PureTensor, Inc. (a Delaware corporation headquartered in Mountain View, California) are independent companies under common founder ownership. Neither is a subsidiary of the other; there is no corporate parent. The division of labour is simple: the Ltd owns and operates the UK compute estate and serves UK clients; the Inc is a US research laboratory that publishes its engineering at puretensor.ai.
Two companies exist because two jurisdictions do different work: research partnerships and publishing sit naturally in the US; owning hardware, employing engineers, and contracting with regulated clients under UK law sits naturally in a UK company. Your contract is with PureTensor Ltd, governed by the law of England and Wales.
Team
PureTensor Ltd is operated by the people named on this site — no outsourced NOC, no ticket queue between you and the engineers who run your environment. Founder and team profiles are on the about section of the main page.
We are building the team: platform engineering, regulated-sector delivery, and operations. Introduce yourself via the contact form.