Former Royal Air Force Deputy Force Commander Colin Sullivan MBE Joins Infleqtion as Managing Director, UK

Sullivan brings extensive strategic expertise in the defence and security sectors, combining decades of front-line military experience with senior leadership appointments across government and industry

OXFORD, England–(BUSINESS WIRE)–Infleqtion (the “Company”), a global leader in neutral atom-based quantum technology, announced the appointment of Colin Sullivan MBE as Managing Director of Infleqtion UK effective immediately. In this role, he will spearhead Infleqtion’s UK operations, advancing its mission to transform quantum research into deployable capabilities for defence, security, and commercial sectors. Sullivan is joining Infleqtion after the company announced in September that it plans to go public through a business combination with Churchill Capital Corp X (NASDAQ: CCCX) (“Churchill X”), a special purpose acquisition company.

Sullivan currently serves as the UK National Air and Space Delegate to the NATO Industry Advisory Group (NIAG), providing industrial insight, advice and guidance on strategic priorities for allied defence capabilities. He has held senior Royal Air Force appointments as Chief Operations Officer and Deputy Force Commander, as well as Senior Military Advisor to the UK’s defence research programme. Post-military service, Sullivan has held senior leadership appointments at Lockheed Martin UK and Boeing Defence UK. Most recently, Sullivan served as UK Chief Strategy Officer and Head of Government Affairs at HENSOLDT UK, leading UK business growth strategies, government and industry engagements.

This appointment builds on Infleqtion’s expanding footprint across the UK’s national quantum ecosystem. Infleqtion UK partners with government and industry stakeholders to deliver deployable quantum computing and quantum sensing capabilities. Infleqtion recently announced it was selected to accelerate performance of its SQALE neutral-atom platform at the National Quantum Computing Centre (NQCC), targeting a 10x–100x increase in gate execution rate in collaboration with leading UK institutions. In addition, Infleqtion has conducted UK-based field testing of its Tiqker optical-clock technology, including Royal Navy sea trials to evaluate resilient, GPS-free navigation on an autonomous maritime platform.

“The UK is building one of the world’s most ambitious national quantum programmes, and Infleqtion is committed to being a long-term partner to that mission,” said Matt Kinsella, CEO of Infleqtion. “With Colin leading Infleqtion UK, we will deepen our engagement across government, academia, and industry and continue to advance world-leading quantum computing and quantum sensing capabilities designed for operational deployment in the UK, and globally.”

“Quantum technology is critical to the future of defence, security and national resilience,” said Sullivan. “The UK is a global centre of excellence in quantum, and Infleqtion is committed to building enduring capability here, bridging the gap between technology and operational deployment. I’m delighted to have been asked to lead the expansion of the Infleqtion UK business and accelerate the transition to quantum computing and quantum sensing solutions.”

Sullivan holds a master’s degree in international relations (Defence Studies) from King’s College London and is a graduate of the Royal College of Defence Studies.

Infleqtion’s product portfolio includes quantum computers, quantum optical clocks, RF receivers, and inertial sensors, all engineered for real-world deployment and optimized with Infleqtion’s proprietary software. These systems are already in use by the U.S. Department of War, NASA, and the U.K. government, and also form elements of multiple collaborations with NVIDIA.

About Infleqtion

Infleqtion is a global leader in neutral-atom quantum technology. We design and build quantum computers, precision sensors, and quantum software for governments, enterprises, and research institutions. Our commercial portfolio includes quantum computers as well as quantum RF systems, quantum clocks, and inertial navigation solutions. Infleqtion is the partner of choice for governments and commercial customers seeking cutting-edge quantum capabilities. Infleqtion announced in September 2025 it plans to go public via a merger with Churchill X (NASDAQ: CCCX). For more information, visit Infleqtion.com or follow Infleqtion on LinkedIn, YouTube, and X.

About Churchill Capital Corp X

Churchill X (NASDAQ: CCCX) is a blank check company formed for the purpose of effecting a merger, amalgamation, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses. It may pursue an initial business combination target in any business or industry.

Additional Information About the Proposed Transaction and Where to Find It

The proposed transaction will be submitted to shareholders of Churchill X for their consideration. Churchill X has filed a registration statement on Form S-4 (the “Registration Statement”) with the U.S. Securities and Exchange Commission (the “SEC”), which includes and will include a preliminary proxy statement/prospectus and definitive proxy statement/prospectus, respectively, to be distributed to Churchill X’s shareholders in connection with Churchill X’s solicitation of proxies for the vote by Churchill X’s shareholders in connection with the proposed transaction and other matters described in the Registration Statement, as well as the prospectus relating to the offer of the securities to be issued to Infleqtion stockholders in connection with the completion of the proposed transaction. After the Registration Statement has been filed and declared effective, a definitive proxy statement/prospectus and other relevant documents will be mailed to Infleqtion stockholders and Churchill X shareholders as of the record date established for voting on the proposed transaction. Before making any voting or investment decision, Churchill X and Infleqtion shareholders and other interested persons are advised to read the preliminary proxy statement/prospectus and any amendments thereto and, once available, the definitive proxy statement/prospectus, as well as other documents filed with the SEC by Churchill X in connection with the proposed transaction, as these documents will contain important information about Churchill X, Infleqtion and the proposed transaction. Shareholders may obtain a copy of the preliminary proxy statement/prospectus, and the definitive proxy statement/prospectus, once available, as well as other documents filed by Churchill X with the SEC, without charge, at the SEC’s website located at www.sec.gov or by directing a written request to Churchill Capital Corp X, 640 Fifth Avenue, 12th Floor, New York, NY 10019.

Forward-Looking Statements

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These statements include: projections of market opportunity and market share; estimates of customer adoption rates and usage patterns; projections regarding the Company’s ability to commercialize new products and technologies; projections of development and commercialization costs and timelines; expectations regarding the Company’s ability to execute its business model and the expected financial benefits of such model; expectations regarding the Company’s ability to attract, retain and expand its customer base; the Company’s deployment of proceeds from capital raising transactions; the Company’s expectations concerning relationships with strategic partners, suppliers, governments, state-funded entities, regulatory bodies and other third parties; the Company’s ability to maintain, protect and enhance its intellectual property; future ventures or investments in companies, products, services or technologies; development of favorable regulations affecting the Company’s markets; the potential benefits of the proposed transaction and expectations related to its terms and timing; and the potential for the Company to increase in value. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as, and must not be relied on as, a guarantee, an assurance, a prediction or a definitive statement of fact or probability. Actual events and circumstances are difficult or impossible to predict and will differ from assumptions, many of which are beyond the control of the Company and Churchill X. These forward-looking statements are subject to known and unknown risks, uncertainties and assumptions that may cause the Company’s or Churchill X’s actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed or implied by such statements. Such risks and uncertainties include: that the Company is pursuing an emerging technology, faces significant technical challenges and may not achieve commercialization or market acceptance; the Company’s historical net losses and limited operating history; the Company’s expectations regarding future financial performance, capital requirements and unit economics; the Company’s use and reporting of business and operational metrics; the Company’s competitive landscape; the Company’s dependence on members of its senior management and its ability to attract and retain qualified personnel; the Company’s concentration of revenue in contracts with government or state-funded entities; the potential need for additional future financing; the Company’s ability to manage growth and expand its operations; potential future acquisitions or investments in companies, products, services or technologies; the Company’s reliance on strategic partners and other third parties; the Company’s ability to maintain, protect and defend its intellectual property rights; risks associated with privacy, data protection or cybersecurity incidents and related regulations; the use, rate of adoption and regulation of artificial intelligence and machine learning; uncertainty or changes with respect to laws and regulations; uncertainty or changes with respect to taxes, trade conditions and the macroeconomic environment; the combined company’s ability to maintain internal control over financial reporting and operate a public company; the possibility that required regulatory approvals for the proposed transaction are delayed or are not obtained, which could adversely affect the combined company or the expected benefits of the proposed transaction; the risk that shareholders of Churchill X could elect to have their shares redeemed, leaving the combined company with insufficient cash to execute its business plans; the occurrence of any event, change or other circumstance that could give rise to the termination of the business combination agreement; the outcome of any legal proceedings or government investigations that may be commenced against the Company or Churchill X; failure to realize the anticipated benefits of the proposed transaction; the ability of Churchill X or the combined company to issue equity or equity-linked securities in connection with the proposed transaction or in the future; and other factors described in Churchill X’s filings with the SEC. Additional information concerning these and other factors that may impact such forward-looking statements can be found in filings and potential filings by the Company, Churchill X or the combined company resulting from the proposed transaction with the SEC, including under the heading “Risk Factors.” If any of these risks materialize or assumptions prove incorrect, actual results could differ materially from the results implied by these forward-looking statements. In addition, these statements reflect the expectations, plans and forecasts of the Company’s and Churchill X’s management as of the date of this press release; subsequent events and developments may cause their assessments to change. While the Company and Churchill X may elect to update these forward-looking statements at some point in the future, they specifically disclaim any obligation to do so. Accordingly, undue reliance should not be placed upon these statements. In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based upon information available to us as of the date of this communication, and while we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete, and our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain and investors are cautioned not to unduly rely upon these statements. An investment in Churchill X is not an investment in any of our founders’ or sponsors’ past investments, companies or affiliated funds. The historical results of those investments are not indicative of future performance of Churchill X, which may differ materially from the performance of our founders’ or sponsors’ past investments.

Participants in the Solicitation

Churchill X, the Company and certain of their respective directors, executive officers and other members of management and employees may, under SEC rules, be deemed to be participants in the solicitation of proxies from Churchill X’s shareholders in connection with the proposed transaction. Information regarding the persons who may, under SEC rules, be deemed participants in the solicitation of Churchill X’s shareholders in connection with the proposed transaction will be set forth in proxy statement/prospectus when it is filed by Churchill X with the SEC. You can find more information about Churchill X’s directors and executive officers in Churchill X’s final prospectus related to its initial public offering filed with the SEC on May 15, 2025. Additional information regarding the participants in the proxy solicitation and a description of their direct and indirect interests will be included in the proxy statement/prospectus when it becomes available. Shareholders, potential investors and other interested persons should read the proxy statement/prospectus carefully when it becomes available before making any voting or investment decisions. You may obtain free copies of these documents from the sources described above.

No Offer or Solicitation

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Contacts

Tim Biba

Solebury Strategic Communications

tbiba@soleburystrat.com