Quantinuum raises $600 Million Series B with Nvidia Connections

An IPO is set for the next 18 months most likely.

Quantinuum

I hope you had a good summer, this Newsletter is back to its normal cadence. There have been several Quantum startup funding rounds (during the last few weeks) I’d like to track and catch up on. Honeywell spin-out Quantinuum certainly is among those I’m most bullish about (a list that has been whittled down considerably in the past couple of years) in the current Quantum winter.

Honeywell confirmed Quantinuum has raised $600 million in equity funding at a pre-money valuation of $10 billion. This is a Quantum startup I’m dying to go IPO. The current Quantum startups that are public, are very underwhelming inspite of their meme like stock actions.

Quantinuum uses trapped-ion QCCD (Quantum Charge-Coupled Device) architecture for its qubits, achieving high fidelities and all-to-all connectivity.

I won’t say this is the best approach to Qubits, but for scale it’s certainly an approach to watch.

The valuation is certainly interesting and ambitious: at a pre-money equity valuation of $10 billion! Perhaps what I like the most about it is that Nvidia participated. The round was announced on September 4, 2025, and included new investors such as Quanta Computer, NVentures (NVIDIA’s venture capital arm), QED Investors, MESH, and Korea Investment Partners, alongside reinvestments from existing shareholders like JPMorgan Chase, Mitsui & Co., Amgen, Cambridge Quantum Holdings, Serendipity Capital, and Honeywell, which remains the majority shareholder.

NVIDIA’s venture capital arm does their due diligence fairly well as I have witnessed over the last three years related to AI chip and Generative AI startups. So there’s that!

The other notable thing is there’s a lot of new investors: New investors including Quanta Computer (Taiwan), NVentures, and QED Investors joined existing backers such as JPMorgan, Mitsui, Amgen, and Honeywell, with Honeywell and Cambridge Quantum remaining the largest shareholders.

Nvidia and Quantinuum

In 2022, Quantinuum became the first company to bring Nvidia’s CUDA-Q to its Quantum systems, establishing a pioneering collaboration with Nvidia.

The round also includes participation from new investors MESH and Korea Investment Partners.

Quantinuum continues increasing its commercial momentum and earning global recognition. The company will work with NVIDIA as a founding collaborator on breakthroughs at the NVIDIA Accelerated Quantum Research Center.

This gives Quantinuum (that already had) a bit more added credibility.

Towards Helios 🔆

This capital raise will support Quantinuum’s advancement of quantum computing at scale, which includes continued progress toward the upcoming launch of Helios, the company’s next generation quantum computing system that is expected to launch this year. It will also support Quantinuum’s path to becoming the first to perform universal fault-tolerant computing.