Cambridge-based Quantinuum Secures £445m from NVentures and Quanta Computer
This article covers an equity raise on 4 September 2025 by Cambridge-based quantum computing firm Quantinuum, led by CEO Rajeeb Hazra. The company raised £445m, with Nvidia’s venture arm NVentures as lead investor and Quanta Computer as another key backer.
What does Quantinuum do?
Helios is a cloud accessible quantum computer provided by Quantinuum as hardware as a service. It lets researchers and businesses run simulations and optimisation tasks that require large computational power.
Why is Quantinuum useful?
Problem
Many industries and researchers face limits of classical computers for complex chemistry, logistics and drug discovery simulations. Powerful quantum hardware is scarce and often costly to access for most users.
Solution
Quantinuum offers Helios as Hardware-as-a-Service and cloud access to advanced quantum computing systems. It supports hybrid quantum-classical computing to improve simulations, optimisation and drug discovery work.
How much did Quantinuum raise?
Quantinuum raised £445m ($600m) in an equity round, taking its pre-money valuation to £7.4bn ($10bn); the round included new investors NVentures and Quanta Computer alongside existing backers.
Who invested in Quantinuum?
The key investors include:
- NVentures: Nvidia’s venture arm that backs companies advancing AI and high-performance computing.
- Quanta Computer: Taiwanese electronics giant contributing manufacturing and hardware supply-chain expertise.
- J.P. Morgan Chase: global bank whose participation signals financial-sector interest and potential commercial partnerships.
- Mitsui: Japanese trading and investment conglomerate, providing industrial networks and access to Asian markets.
- Amgen: pharmaceutical major with interests in computational drug discovery and strategic biotech collaborations.
- Honeywell: legacy shareholder that spun out the original quantum division, supplying industrial-scale experience in hardware and systems integration.
- IBM: established quantum computing company and investor, lending software expertise and enterprise cloud integration credibility.
If you're researching potential backers in this space:
- Explore our list of hardware venture capital firms in the UK
- Browse our directory of hardware angel investors in the UK
Who founded Quantinuum?
Rajeeb Hazra is the CEO of Quantinuum.
Where is Quantinuum based?
Quantinuum is based in Cambridge, UK.
What sector is Quantinuum in?
Quantinuum operates in the quantum computing sector. The sector builds computers using quantum physics to solve very hard problems faster than classical machines.
Key trends and challenges in quantum computing:
Commercialisation and hybrid computing
Hybrid quantum-classical approaches are emerging, combining classical GPUs with quantum processors for molecule simulation in drug discovery.
Hardware scaling and error correction
Qubit counts are growing from tens to hundreds, but high error rates still prevent large-scale, fault-tolerant computing.
Access and ecosystem readiness
Cloud access and hardware rental services broaden users, yet skilled talent shortages and weak standards slow adoption.
For a deeper look at innovation in this space, see the hardware startups in the UK.
They've invested in Quantinuum
Get to know these hardware investors
| Investors | Investment Focus | Startup Investments | Round Size | Connect |
|---|---|---|---|---|
 NVentures( ) | ||||
NVentures( ) | ||||
 Quanta Computer( ) | ||||
 JP Morgan( ) | ||||
 Sumitomo Mitsui Banking Corporation( ) | ||||
 Amgen( ) | ||||
 Honeywell( ) | ||||
IBM( ) | ||||
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