Quantinuum plans to raise as much as USD$1.05 billion through a Nasdaq initial public offering (IPO), positioning the company for what could become the largest traditional IPO yet for a quantum computing firm.
The company updated its SEC filing Tuesday and said it intends to offer about 21 million shares priced between USD$45 and USD$50 each. Additionally, the shares are expected to trade under the ticker QNT on the Nasdaq exchange.
At the top of the proposed range, Quantinuum could achieve a fully diluted valuation near USD$12.7 billion, according to Reuters figures referenced in the filing. Furthermore, the IPO would represent one of the most significant public market debuts in the emerging quantum computing sector.
Traditional IPOs generally involve stricter regulatory scrutiny than special purpose acquisition company mergers. Consequently, institutional investors often view them as more credible pathways to public markets.
Quantinuum emerged in 2021 after Honeywell International Inc. (NASDAQ: HON) merged Honeywell Quantum Solutions with Cambridge Quantum. The transaction combined Honeywell’s trapped-ion quantum hardware with Cambridge Quantum’s software and algorithm business.
The updated filing provides investors with one of the clearest financial pictures yet of a major standalone quantum computing company. In addition, it outlines Quantinuum’s revenue growth, operational losses and research ambitions.
Quantinuum reported USD$30.9 million in revenue during 2025, compared with USD$23 million one year earlier. Meanwhile, the company generated USD$5.2 million in revenue during the quarter ended March 31, 2026.
The company also reported substantial losses as it continued expanding research and development programs. According to the filing, Quantinuum posted a net loss of USD$192.6 million in 2025.
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Quantinuum generated USD$79.3M in bookings in 2025
That figure increased from a USD$144.1 million loss recorded during 2024. Furthermore, the filing disclosed that Quantinuum has accumulated a total deficit of approximately USD$1.5 billion since inception.
Executives said the company still requires significant investment to support scaling efforts, engineering work and commercialization activities. Quantinuum also disclosed that its predecessor organizations invested roughly USD$2 billion into quantum computing research over the past decade.
Quantinuum generated USD$79.3 million in bookings during 2025. Bookings refer to signed customer agreements that could convert into future revenue over time.
The company operates across several business lines, including quantum computing access, cybersecurity tools, software platforms and professional services. Furthermore, cybersecurity products represented a meaningful share of recent revenue.
Quantinuum markets quantum-resistant encryption systems designed to protect communications from future quantum-enabled cyber threats. Furthermore, the company said customers span industries including finance, aerospace, pharmaceuticals, energy and defense.
Quantum computing differs substantially from traditional computing systems. Conventional computers rely on bits that exist as either zeroes or ones.
Quantum computers instead use quantum bits, known as qubits, that can exist in multiple states simultaneously. Consequently, researchers believe quantum systems could eventually solve highly complex problems far faster than conventional machines.
Scientists and corporations continue exploring quantum computing applications in chemistry, logistics, machine learning and cybersecurity. However, researchers still face major technical barriers before the technology becomes commercially widespread.
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Honeywell to retain substantial control post IPO
Quantinuum builds its systems using trapped-ion technology. The architecture relies on electrically charged atoms controlled through electromagnetic fields.
The company said this design prioritizes fidelity, which refers to computational accuracy. Additionally, Quantinuum stated that it aims to scale these systems toward larger and more reliable quantum computers.
The filing devoted considerable attention to fault tolerance and error correction. Quantum computers naturally experience computational errors because qubits remain highly sensitive to environmental disturbances.
Quantinuum said it continues developing logical qubits designed to reduce those errors and improve reliability. Furthermore, the company believes strong error correction remains essential for handling commercially useful workloads.
Chief executive Rajeeb Hazra leads the company after previously serving as an executive at Intel. Meanwhile, Honeywell chairman and chief executive Vimal Kapur currently chairs Quantinuum’s board.
The filing also revealed that Honeywell will retain substantial control after the IPO closes. According to the prospectus, Honeywell is expected to control approximately 49.1 per cent of Quantinuum’s voting power following the offering.
Cambridge Quantum will maintain roughly 32.5 per cent voting power after the IPO. Founder Ilyas Khan remains the company’s largest individual shareholder.
Based on the proposed offering price, Khan’s personal stake could exceed USD$2 billion. Furthermore, Reuters previously reported that Quantinuum raised USD$600 million during a 2025 financing round valuing the company near USD$10 billion.
Quantinuum plans to use IPO proceeds for working capital, capital expenditures and additional research efforts. The company also intends to fund broader corporate operations and commercialization initiatives.
JPMorgan Chase & Co. (NYSE: JPM), Morgan Stanley (NYSE: MS) and Goldman Sachs Group Inc. (NYSE: GS) will serve as lead book-running managers for the offering.
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Final pricing could occur in early June
The IPO arrives during a period of rising investor interest in quantum technologies. Additionally, governments and private companies have increased spending on advanced computing infrastructure during the past several years.
Reuters reported that the United States government recently announced support for several domestic quantum initiatives tied to CHIPS-related programs and strategic investments. Meanwhile, market sources told Reuters that investor demand for the Quantinuum offering appears strong ahead of final pricing.
According to people familiar with the process, final pricing could occur around June 3 or June 4 before trading begins on Nasdaq. However, Quantinuum acknowledged that the industry still faces substantial technical and commercial uncertainty.
The filing said the company competes against businesses pursuing superconducting, neutral atom, silicon-based and photonic quantum architectures. Quantinuum has also identified supply chain management, system scaling and application development as continuing industry-wide challenges.
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