Trapped-ion quantum computing company Quantinuum, which is majority owned by Honeywell, will soon begin the process of going public.
According to Honeywell, Quantinuum plans to make a confidential submission of a draft registration statement on Form S-1 to the U.S. Securities and Exchange Commission (the “SEC”) relating to the proposed initial public offering of Quantinuum’s common stock. The number of shares to be offered and the price range for the proposed offering have not yet been determined. The offering is subject to market and other conditions and the completion of the SEC’s review process.
Quantinuum, which offers full-stack solutions, was formed in 2021 through the merger of hardware provider Honeywell Quantum Solutions and software developer Cambridge Quantum Computing. Since then, the company has raised approximately US$900 million excluding Honeywell’s own US$300 million. This includes US$600 million in September 2025 at a pre-money valuation of US$10 billion, which saw funds like NVentures (NVIDIA’s venture capital arm) and Korea Investment Partners join JPMorganChase, Mitsui, Amgen, and others.
Last week, another developer of quantum computers, Infleqtion, also announced its intention to go public. Singapore-based quantum software firm, Horizon Quantum, also made a similar announcement in December 2025.
