Exhibit 99.1

Infleqtion and Churchill Capital Corp X Announce Confidential Submission of Draft

Registration Statement on Form S-4 in Connection with Proposed Business

Combination

FOR IMMEDIATE RELEASE

BOULDER, Colo. & NEW YORK | November 4, 2025 | Infleqtion, a global leader in neutral-atom–based quantum technology, and Churchill Capital Corp X (NASDAQ: CCCX), a publicly traded special purpose acquisition company, today announced the confidential submission of a draft registration statement on Form S-4 (the “Registration Statement”) with the U.S. Securities and Exchange Commission (“SEC”) on October 29, 2025. The submission of the Registration Statement marks an important milestone toward the completion of the previously disclosed proposed business combination between Infleqtion and Churchill Capital Corp X (“Churchill X”).

Infleqtion translates quantum technology into solutions that expand human potential. Infleqtion designs, builds, and sells quantum computers, precision sensors, and software to governments, enterprises, and research institutions. As a first mover in neutral atom technology – a leading quantum modality recognized for scalability, flexibility, and cost efficiency – Infleqtion has built a commercial platform that is practical, differentiated, and ready to scale. This approach uniquely enables Infleqtion to power both quantum computing and precision sensing from a single product architecture. The company’s product portfolio includes quantum computers, quantum 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 in collaboration with NVIDIA, and by the U.S. Department of Defense, NASA, and the U.K. government.

As announced on September 8, 2025, Infleqtion intends to become a publicly traded company through the proposed business combination. Upon closing, Infleqtion will become the first publicly listed neutral-atom quantum technology company and the only public company with commercial leadership across both quantum computing and precision sensing.

Infleqtion is already well-capitalized, and the proposed business combination is expected to deliver over $540 million in gross proceeds (assuming no redemptions by shareholders of amounts held in trust by Churchill Capital Corp X), including more than $125 million of incremental capital raised through a common stock PIPE at the transaction valuation from leading existing and new institutional investors. Proceeds from the proposed business combination will accelerate Infleqtion’s technology roadmap and product commercialization, expanding applications across artificial intelligence, national security, and space, and unlocking additional real-world use cases.

Since announcing the proposed business combination with Churchill X, Infleqtion has continued to advance its technology leadership:

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Achieved 12 logical qubits with error detection and loss correction—surpassing its prior 2026 target and positioning the company ahead of schedule on its roadmap to deliver 1,000 logical qubits by 2030.

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Expanded collaboration with NVIDIA to bring Infleqtion’s NVQLink quantum architecture to GPU-accelerated AI systems, with installation of an NVQLink-enabled Sqale quantum computer underway at the Illinois Quantum & Microelectronics Park.

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Demonstrated the world’s first quantum optical clock for underwater autonomous navigation, in partnership with the Royal Navy—advancing GPS-free positioning capabilities.

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Announced a strategic partnership with Silicon Light Machines to enhance quantum computer performance through next-generation optical technologies.

Upon closing, the combined company will operate as “Infleqtion, Inc.” and is expected to be listed on a leading North American exchange under the ticker symbol “INFQ.” The business combination remains subject to approval by Churchill X shareholders, the Registration Statement being declared effective by the SEC, and other customary closing conditions. The business combination is expected to close in Q1 of 2026, assuming no extended federal government shutdown.

About Infleqtion

Infleqtion is a global leader in neutral-atom quantum technology. Infleqtion designs and builds quantum computers, precision sensors, and quantum software for governments, enterprises, and research institutions. Infleqtion’s 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 Capital Corp X (NASDAQ: CCCX). For more information, visit Infleqtion.com or follow Infleqtion on LinkedIn, YouTube, and X.

About Churchill Capital Corp X

Churchill X 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 intends to file a registration statement on Form S-4 with the SEC, which will include preliminary and definitive proxy statements 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 to be 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, once available, 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 or 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

This press release includes “forward-looking statements” within the meaning of the federal securities laws. Forward-looking statements may be identified by the use of words such as “estimate,” “plan,” “project,” “forecast,” “intend,” “will,” “expect,” “anticipate,” “believe,” “seek,” “target,” “continue,” “could,” “may,” “might,” “possible,” “potential,” “predict” or similar expressions that predict or indicate future events or trends or that are not statements of historical matters. The company has based these forward-looking statements on current expectations and projections about future events. 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

This press release does not constitute an offer to sell or the solicitation of an offer to buy any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. This press release is not, and under no circumstances is to be construed as, a prospectus, an advertisement or a public offering of the securities described herein in the United States or any other jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended, or exemptions therefrom. INVESTMENT IN ANY SECURITIES DESCRIBED HEREIN HAS NOT BEEN APPROVED BY THE SEC OR ANY OTHER REGULATORY AUTHORITY NOR HAS ANY AUTHORITY PASSED UPON OR ENDORSED THE MERITS OF THE OFFERING OR THE ACCURACY OR ADEQUACY OF THE INFORMATION CONTAINED HEREIN. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

Contact

Tim Biba

Solebury Strategic Communications

tbiba@soleburystrat.com

Churchill Capital Corp X/Cayman 8-K