After the Trump administration's investment, the largest IPO of quantum computing in the US is coming!
Honeywell-backed company Quantinuum plans to raise $1.05 billion through its initial public offering.
The quantum computing leader supported by Honeywell International Inc. (HON.US), Quantinuum (QNT.US), officially submitted its initial public offering (IPO) pricing document to the U.S. Securities and Exchange Commission (SEC) this Tuesday, planning to issue approximately 21 million shares of stock at a price of $45 to $50 per share, with a maximum fundraising size of up to $1.05 billion. If calculated at the upper limit of the issuance range, the company's total market value would reach approximately $12.7 billion, making it the largest IPO in the history of the quantum computing field.
This is not a typical tech company going public. Quantinuum's IPO is taking place at a symbolically significant time: after two years of skyrocketing, the quantum computing sector is entering a period of fluctuation and differentiation, with the Trump administration just announcing an investment of over $2 billion in the quantum computing industry, and the "quantum intelligence fusion" of AI and quantum computing being highly anticipated by the global tech community. With multiple narratives overlaid, this IPO has become a key window to observe the technology realization, valuation logic evolution, and capital exit path of the entire quantum computing industry.
Quantinuum completed a $600 million equity financing in September 2025, valuing the company at $10 billion at that time. From the $10 billion valuation last fall to the $12.7 billion upper limit valuation of this IPO, the valuation has increased by approximately 27% in just 8 months. This increase reflects not only the continued heat in the quantum computing sector but is also closely related to recent policy catalysis.
Of particular note are the equity structure and governance framework. According to the S-1 filing, Honeywell International Inc. currently holds about 55% of Quantinuum's shares, Cambridge Quantum affiliated entities own about 36%, and minority investors hold the remaining 11%. After the IPO, Honeywell International Inc. will retain approximately 49.1% of the combined voting rights, essentially remaining the controlling shareholder.
The company has adopted an "Up-C" listing structure: the listing entity Quantinuum Inc. acts as the holding company, with its only asset being the management interest in the operating entity Quantinuum Holdings, LLC. This structure also includes a Tax Receivable Agreement (TRA), which requires the listed company to pay 85% of the actual cash tax savings resulting from the IPO and future share exchanges to "continuing common equity holders" (mainly Honeywell International Inc. and Cambridge Quantum affiliates). The document suggests that this payment will be "substantial."
Additionally, the company has established a "Transaction Committee," without the committee's recommendation, the board of directors may not approve acquisitions, significant debt financing, or changes in business scope exceeding $10 million, and the committee must have at least one vote from a director designated by Honeywell International Inc. Vimal Kapur, CEO of Honeywell International Inc., personally serves as the chairman of the Quantinuum board, with the CEO being Rajeeb Hazra, who previously served at Intel Corporation for many years.
These institutional arrangements mean that post-IPO Quantinuum will be a typical "controlled company" - Honeywell International Inc. maintains significant influence through voting rights and governance structure, and public shareholder's influence will be relatively limited. In addition, fundraising of approximately $1 billion corresponding to a valuation of around $12.7 billion implies a relatively small free float in the market. Some analysts point out that when control is concentrated and the free float is thin, investors usually demand a discount and stock prices can be greatly affected by the news.
Technology Roadmap: The "2029 Promise" of the Apollo System
As of March 31, the company reported a net loss of $136.6 million for the three months, with revenue of $5.2 million, compared to a net loss of $30.5 million and revenue of $19.1 million in the same period last year. However, the core story that Quantinuum is telling to investors is not about current revenue and profit, but a clear roadmap to a "fault-tolerant quantum computer."
The company's three-generation technology evolution path is: Helios (2025, 98 physical quantum bits) Apollo (2029, hundreds of logical quantum bits) Lumos (2033, utility-scale). CEO Rajeeb Hazra explicitly stated in a letter to investors, "We believe we are executing a roadmap aimed at launching the first commercial-scale, fully fault-tolerant quantum computer - the Apollo system by the end of this decade."
Apollo is positioned as a full-stack fault-tolerant quantum computer, aiming to achieve a "commercial inflection point" in material discovery with a capability of millions of gate operations. Lumos is designed as a utility-scale system with over 1 million physical quantum bits. Whether Apollo can be delivered as planned in 2029 will be a key industry benchmark for the ion trap technology roadmap.
The core technology route adopted by Quantinuum is the Quantum Charge-Coupled Device (QCCD) ion trap architecture, which currently leads in two-qubit gate fidelity internationally. The company has demonstrated 48 fully error-corrected logical quantum bits on the Helios system (using the Iceberg encoding scheme), with a fidelity of 99.99% and a coding rate close to 2:1 - for reference, Alphabet Inc. Class C's 2024 Willow chip's error-correcting coding rate is approximately 100:1. This means that for every approximately two physical quantum bits, one logical quantum bit can be encoded, far surpassing peers in efficiency.
In terms of commercial deployment, Quantinuum has accumulated several notable partnership cases. The company has signed multi-year commercial agreements with BMW Group, with BMW becoming its long-term strategic customer in the automotive industry and securing priority usage rights for multiple generations of quantum computers, focusing on accelerating the development of advanced materials such as high-fidelity molecular simulation for fuel cell catalysts. In addition, companies such as Dow and Mitsui have also become early users and partners. The company's business strategy is clear - before the commercial fault-tolerant Apollo system is ready, it intends to verify its technological capabilities, accumulate industry know-how, and build an ecosystem barrier by collaborating with industry giants.
In the risk factors section, the company openly acknowledges several key challenges: manufacturing processes have not reached mass production levels, and they currently rely on a single supplier for multiple critical materials and systems. Additionally, three of the company's four commercial quantum computing systems are located in Colorado, with the fourth deployed in Japan, and the fifth planned to be deployed in Singapore later this year - the high geographical concentration implies potential risks from Geo Group Inc and operational risks.
Industry Ecology: Quantum Stocks' Roller Coaster Market, Bubbles, AI, and Government Investment Narratives
Quantinuum's IPO is not an isolated event but is happening amid significant volatility in the quantum computing sector. In 2025, D-Wave Quantum (QBTS.US) saw its stock price surge over 200%, continuing the astonishing increase of over 800% the previous year. Rigetti Computing (RGTI.US) accumulated nearly 3000% growth from the beginning of 2023 to the end of 2025. The quantum computing sector reached a phase peak in October 2025 before entering a correction.
However, in 2026, the sector experienced noticeable selling pressure. The stock prices of IonQ, Rigetti, and D-Wave fell by over 30% at the beginning of 2026. As of the latest data, D-Wave has a market value of approximately $10.8 billion, Rigetti around $8.8 billion, and even Quantum Computing (QUBT.US) with revenues in the millions has a market value of $2.78 billion. These companies share the common characteristics of high valuation, low revenue, and continued losses, with their valuation logic heavily relying on technology roadmap narratives rather than current financial performance.
Given this backdrop, Quantinuum's IPO at a valuation of $12.7 billion is essentially a "second pricing" in a track that has already been hyped. Calculated based on revenue of $30.93 million in 2025, its Price-to-Sales ratio exceeds 400 times - far surpassing most AI software companies.
One of the important logics supporting the high valuation of quantum computing is its deep integration prospects with artificial intelligence.
NVIDIA Corporation CEO Jensen Huang stated at the 2026 GTC conference that the "quantum computing inflection point has arrived" and released the world's first open-source quantum AI model series called Ising, stating that "AI is crucial for realizing practical quantum computing." Liu Qingfeng, Chairman of iFlytek Co., Ltd., stated at the 2026 Smart Quantum Summit that in the next five years, AI will drive quantum computing to a new level, and quantum computing will also support AI, marking the true beginning of the "age of deep integration of AI + quantum."
Two main trends are interwoven in evolution: "AI for quantum computing" - using AI technology to optimize quantum bit control, dynamic error correction, and system calibration to accelerate quantum hardware engineering processes; "quantum computing for AI" - with traditional computing facing bottlenecks in computing power and energy consumption in AI training and reasoning, quantum computing is expected to fundamentally surpass the performance limits of traditional computing. This narrative of "quantum intelligence fusion" provides quantum computing companies with a value imagination space beyond the hardware itself.
The "National-level Venture Capital" of the Trump Administration
The most milestone policy event occurred in the same week as Quantinuum submitting its IPO pricing document. On May 21, the Trump administration announced that the Department of Commerce would provide over $2 billion in support funding to nine quantum computing companies in aggregate, sourced from a special appropriation for early-stage technology projects in the 2022 "CHIPS Act."
The key feature of this funding is that it is the first time the U.S. government has adopted a "funds for equity" model in technology support - providing non-controlling minority ownership as a condition for funding to ensure that taxpayers can share the returns when the technology matures and companies grow. The Department of Commerce stated that the "structure of these transactions will ultimately benefit taxpayers."
The distribution of funds is as follows: IBM received $1 billion (the largest single grant) for establishing the first dedicated quantum chip foundry subsidiary in Albany, New York; Graphcore received $375 million; Quantinuum, Rigetti, D-Wave, Atom Computing, Inflation, and PsiQuantum each received $100 million, while the startup Diraq received $38 million. This allocation plan shows that the U.S. government is pursuing both "key breakthroughs" (with a heavy investment in IBM's quantum chip manufacturing capability) and "diverse development" (covering a wide range of technologies such as superconducting, ion trap, neutral atom, silicon spin, and photonics).
Viewing Quantinuum's IPO in this policy context, its strategic significance is even more prominent - the company is not only one of the quantum computing core enterprises supported by the government, but will also soon become a pure quantum target for public investors. This dual identity of "backed by the national team + market pricing" may provide an additional safety cushion for its IPO pricing and post-listing performance.
Quantinuum's IPO will be the most concentrated pricing event in the quantum computing investment theme of 2026. This IPO will ultimately be a test of "patient capital" - whether the capital market is willing to pay for a deep tech item at a valuation of tens of billions of dollars, which may take a decade to fulfill its core promises. In the lingering afterglow of the AI bull market and strong government support, the answer may lean towards optimism in the short term. However, as an old saying on Wall Street goes: the market is a voting machine in the short term, but a weighing machine in the long term. The true IPO story of Quantinuum may only come on the day when the Apollo system is truly operational, ushering in a final reassessment of its valuation.
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