Quantinuum Partners with Microsoft in New Phase of Reliable Quantum Computing with Breakthrough Demonstration of Reliable Logical Qubits

Quantinuum’s latest generation quantum computer with Microsoft’s qubit-virtualization system demonstrate logical qubits with 800x better logical error rates than physical error rates

April 3, 2024

Broomfield, Colorado, and London, UK, April 3rd, 2024 Quantinuum, the world’s largest integrated quantum computing company, together with Microsoft, has achieved a breakthrough in making fault tolerant quantum computing a reality, by demonstrating the most reliable logical qubits with active syndrome extraction, an achievement previously believed to be years away from realization.

A collaboration between Quantinuum's team in the USA and UK and Microsoft's quantum computing team has led to the creation of four logical qubits that demonstrate error rates 800 times lower than corresponding physical error rates. Impressively, the joint team demonstrated the ability to run 14,000 independent instances of a quantum circuit error-free. Breakthroughs of this magnitude have the potential to significantly accelerate progress towards the ultimate goal of achieving universal fault tolerant quantum computing, potentially shortening the timeline to tackling real-world problems and revolutionizing fields like materials science and drug discovery. 

The achievement stems from the industry leading fidelity, scalability, and flexibility of Quantinuum's 32-qubit H2 quantum processor, Powered by Honeywell, combined with Microsoft’s highly innovative error correction capabilities. The joint team created four logical qubits using 30 of the 32 physical qubits available on the H2, leading to the creation of what both companies herald as the most "reliable logical qubits". They also successfully demonstrated syndrome extraction, another critical milestone that is necessary for fault tolerant quantum computing. More details of the results can be reviewed here.

"The result announced today further cements Quantinuum's position at the forefront of universal fault tolerant quantum computing. Today’s achievement was only possible using Quantinuum’s H2 quantum computer, with its unparalleled 99.8% two-qubit gate fidelities; the 32 qubits in our QCCD architecture; and all-to-all qubit connectivity. Building on the exceptional performance of our current systems, we will continue to innovate to make universal fault tolerant quantum computing a reality sooner than previously imagined.” - Dr. Rajeeb Hazra, CEO, Quantinuum.

In the new era described by Microsoft as “Level 2 Resilient”, quantum computing is capable of dealing with the issues caused by errors, and can begin to tackle meaningful challenges, such as modelling the states of molecules and materials, simulating systems in condensed matter physics, and exploring solutions to problems across many fields. Based on Microsoft’s exacting criteria, the demonstration of multiple, entangled logical qubits, with the logical qubits outperforming the physical qubits marks a long-anticipated transition into this second phase of quantum computing.

“This is an important breakthrough for quantum computing. The collaboration between Quantinuum and Microsoft has established a crucial step forward for the industry and demonstrated a critical milestone on the path to hybrid classical-quantum supercomputing capable of transforming scientific discovery.” - Dr. Krysta Svore – Distinguished Engineer and VP of Advanced Quantum Development for Microsoft Azure Quantum

“As leaders, we will continue to innovate more rapidly than the competition, with hardware innovations and developing applications to take advantage of the new era of truly logical qubits. We will continue to ensure that our customers are the first to benefit from these and future breakthroughs. I am excited to see how they take advantage of reliable quantum computing, to generate more powerful solutions than ever to their most challenging problems.” - Ilyas Khan, Vice-Chairman and Chief Product Officer, Quantinuum

About Quantinuum 

Quantinuum, the world’s largest integrated quantum company, pioneers powerful quantum computers and advanced software solutions. Quantinuum’s technology drives breakthroughs in materials discovery, cybersecurity, and next-gen quantum AI. With almost 500 employees, including 370+ scientists and engineers, Quantinuum leads the quantum computing revolution across continents.

The Honeywell trademark is used under license from Honeywell International Inc. Honeywell makes no representations or warranties with respect to this service.

About Quantinuum

Quantinuum, the world’s largest integrated quantum company, pioneers powerful quantum computers and advanced software solutions. Quantinuum’s technology drives breakthroughs in materials discovery, cybersecurity, and next-gen quantum AI. With over 500 employees, including 370+ scientists and engineers, Quantinuum leads the quantum computing revolution across continents. 

May 8, 2026
Honeywell Announces Quantinuum’s Filing of Registration Statement for Proposed Initial Public Offering

Source: PRNewswire - Honeywell

Charlotte, N.C., May 8th, 2026 — Honeywell (NASDAQ: HON) today announced that Quantinuum, a leading, full-stack quantum computing company, has publicly filed a registration statement on Form S-1 with the U.S. Securities and Exchange Commission (the “SEC”) relating to a proposed initial public offering of shares of its Class A common stock.

The number of shares to be offered and the price range for the proposed offering have not yet been determined. Quantinuum intends to list its Class A common stock on the Nasdaq Global Select Market under the ticker symbol “QNT.”

J.P. Morgan and Morgan Stanley (in alphabetical order) are acting as joint lead active book-running managers for the proposed offering. Jefferies and Evercore ISI are also acting as active book-running managers.

The proposed offering is subject to market conditions, and there can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering.

The proposed offering will be made available only by means of a prospectus. Copies of the preliminary prospectus, when available, may be obtained from: J.P. Morgan Securities LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717 or by email at prospectus-eq_fi@jpmchase.com and postsalemanualrequests@broadridge.com; Morgan Stanley & Co. LLC, 180 Varick Street, 2nd Floor, New York, NY 10014, Attention: Prospectus Department or by email at prospectus@morganstanley.com; Jefferies LLC, Attn: Equity Syndicate Prospectus Department, 520 Madison Avenue, New York, New York 10022, by telephone at (877) 821-7388 or by email at Prospectus_Department@Jefferies.com; or Evercore Group L.L.C., Attention: Equity Capital Markets, 55 East 52nd Street, 35th Floor, New York, NY 10055, by telephone at 888-474-0200 or by email at ecm.prospectus@evercore.com.

The registration statement relating to these securities has been filed with the SEC but has not yet become effective. These securities may not be sold, nor may offers to buy be accepted, prior to the time the registration statement becomes effective. This press release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. Any offers, solicitations or offers to buy, or any sales of securities will be made in accordance with the registration requirements of the Securities Act of 1933, as amended.

About Honeywell

Honeywell is an integrated operating company serving a broad range of industries and geographies around the world. Our business is aligned with three powerful megatrends – automation, the future of aviation and energy transition – underpinned by our Honeywell Accelerator operating system and Honeywell Forge IoT platform. As a trusted partner, we help organizations solve the world's toughest, most complex challenges, providing actionable solutions and innovations through our Aerospace Technologies, Industrial Automation, Building Automation and Energy and Sustainability Solutions business segments that help make the world smarter, safer, as well as more secure and sustainable. For more news and information on Honeywell, please visit www.honeywell.com/newsroom.

About Quantinuum

Quantinuum is a leading quantum computing company offering a full-stack platform designed to make quantum computing deployable in real-world environments. The company has commercially deployed multiple generations of quantum systems built on the well-established QCCD architecture, which it has implemented with novel designs and capabilities to achieve the industry’s highest accuracy levels based on average two-qubit gate fidelity as of December 31, 2025. Quantinuum has active engagements with market leaders across pharmaceuticals, material science, financial services, and government and industrial markets. Quantinuum’s headquarters is in Broomfield, Colorado, with additional facilities across the United States, United Kingdom, Germany, Japan, and Singapore.

Contacts:

Media
Stacey Jones
(980) 378-6258
Stacey.Jones@honeywell.com

Investor Relations
Mark Macaluso
(704) 627-6118
Mark.Macaluso@honeywell.com

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May 5, 2026
Quantinuum and BMW Group Expand Landmark Quantum Computing Collaboration with New Multi-Year Partnership
  • The companies plan to continue their co-creation partnership to advance future mobility
  • BMW to access the latest generations of Quantinuum systems throughout the partnership
  • Advanced materials science research supports a range of next-generation technologies

Broomfield, Colorado, May 5th, 2026 — Quantinuum and BMW Group have formally expanded their ongoing collaboration into a multi-year partnership with a mission to unlock future mobility by applying quantum computing toward advanced materials science.

Since 2021, Quantinuum and BMW Group have been collaborating on joint research focused on tackling complex challenges in industrial chemistry to support the advancement of next-generation mobility. The collaboration has progressed from foundational algorithm development to advanced simulations of molecular systems, allowing the researchers to unlock insights into catalytic activity, reaction pathways, and material performance in energy-relevant environments.

The companies have now agreed to extend the work, positioning the alliance to become one of the longest-sustained commitments between a commercial enterprise and a quantum computing provider to date.

“Quantinuum is focused on driving commercial adoption of quantum computing through close collaboration with industry leaders on high-impact applications," said Dr. Rajeeb Hazra, President and CEO of Quantinuum. “Our expanded partnership with the BMW Group underscores this focus, and we’re excited to scale the meaningful work we’ve been advancing together.”

Researchers at BMW Group are utilizing Quantinuum's trapped-ion architecture, which provides the high-fidelity operations necessary to accurately simulate molecular systems, particularly electrochemical processes that play a critical role across a range of technologies relevant to sustainable mobility and the design and optimization of fuel cells.

Under the terms of the agreement, BMW Group will leverage successive generations of Quantinuum’s quantum computers. This includes the current Helios system and upcoming generations, Sol (planned for 2027) and Apollo (planned for 2029). This will enable the teams to validate progress at each stage while scaling toward industrially meaningful solutions.

“We have been exploring quantum computing for many years,” said Dr. Martin Tietze, Vice President of New Technologies at BMW Group. “Together with partners such as Quantinuum, we translate advances in quantum hardware into real‑world applications, including materials optimization, supporting the development of future vehicle generations.”

Quantinuum’s progress toward large-scale, fault-tolerant systems helps to ensure that as the hardware reaches milestones in performance, BMW can apply that computational power to catalyst chemistry research, targeting critical oxygen reduction reaction processes at platinum catalysts to potentially lower costs and improve energy efficiency.

The companies broke new ground in 2024, alongside another commercial partner, as the first to simulate catalytic performance using a quantum computer with results published in Nature Partner Journal.

Beyond its technical achievements, the collaboration has evolved into a deeply connected, cross-disciplinary effort, bringing together quantum scientists, chemists, and engineers in a sustained partnership that reflects both the complexity of the challenge and the scale of the ambition.

About Quantinuum

Quantinuum is a leading quantum computing company offering a full-stack platform designed to make quantum computing deployable in real-world environments. The company has commercially deployed multiple generations of quantum systems built on the well-established QCCD architecture, which it has implemented with novel designs and capabilities to achieve the industry’s highest accuracy levels based on average two-qubit gate fidelity.[i] Quantinuum has active engagements with market leaders across pharmaceuticals, material science, financial services, and government and industrial markets.

The company has a global workforce of approximately 700 employees, including top scientists and researchers. Over 70% of its technology team hold PhDs or Master's degrees. Quantinuum’s headquarters is in Broomfield, Colorado, with additional facilities across the United States, United Kingdom, Germany, Japan, and Singapore.  

For more information, please visit www.quantinuum.com.

[i] As of December 31, 2025.

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April 22, 2026
Honeywell Announces Quantinuum’s Confidential Submission of Draft Registration Statement for Proposed Initial Public Offering

Source: PRNewswire - Honeywell

Charlotte, N.C., April 22nd, 2026 — Honeywell (NASDAQ: HON) today announced that Quantinuum LLC (“Quantinuum” or the “Company”), which is majority owned by Honeywell, confidentially submitted a draft registration statement on Form S-1 to the U.S. Securities and Exchange Commission (the “SEC”) on February 17, 2026, 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.

This press release is being made pursuant to, and in accordance with, Rule 135 under the Securities Act of 1933, as amended (the “Securities Act”), and shall not constitute an offer to sell, or the solicitation of an offer to buy, any securities. Any offers, solicitations or offers to buy, or any sales of securities, will be made in accordance with the registration requirements of the Securities Act.

Contacts:

Media
Stacey Jones
(980) 378-6258
Stacey.Jones@honeywell.com

Investor Relations
Mark Macaluso
(704) 627-6118
Mark.macaluso@honeywell.com

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