GigCapital7 Corp. Announces Non-Redemption Agreements Funding in the Approximate Amount of at Least $19.3 Million in Conjunction with the Anticipated Closing of the Business Combination with Hadron Energy, Inc.

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NEW YORK — GigCapital7 Corp. (Nasdaq: GIG) (“GigCapital7” or the “Company”) today announced that it has directly solicited and entered into non-redemption agreements (each a “Non-Redemption Agreement” and together the “Non-Redemption Agreements”) with a few public stockholders, pursuant to which such stockholders have agreed not to exercise redemption rights in connection with the proposed business combination between GigCapital7 and Hadron Energy, Inc. (“Hadron”) with respect to an aggregate of 1,800,000 Class A ordinary shares of the Company, representing approximately $19.3 million of the funds held in the Company’s trust account, and with the possibility for additional Non-Redemption Agreements, and that will be moved into the Hadron Energy balance sheet at the closing of the business combination. These NRA funds are being added to approximately $7.6 million that have already been funded on a SAFE bridge note over the last few months to Hadron Energy, for a total equity raise by GigCapital7 into Hadron Energy of about $26.9 million, which far exceeds the Business Combination Agreement’s announced minimum cash condition on closing of $20 million.

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The Non-Redemption Agreements were entered into in anticipation of the closing of the business combination contemplated by the Business Combination Agreement, dated as of September 27, 2025, as amended, by and among GigCapital7, Hadron Energy and MMR Merger Sub, Inc. The extraordinary general meeting of shareholders of GigCapital7 to approve the business combination is scheduled for May 7, 2026, with the deadline for submission of redemption requests set for 5:00 p.m., Eastern Time, on May 5, 2026.

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Additional information regarding the Non-Redemption Agreement will be provided in a Current Report on Form 8-K to be filed by GigCapital7 with the U.S. Securities and Exchange Commission.

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About Hadron Energy, Inc.

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Hadron is a pioneer in MMR technology. Designed to deliver 10 MWe of continuous power, the Halo MMR is smaller, more cost-effective, and faster to deploy than other proposed nuclear power solutions. The reactor’s vessel, core, and containment shell are fully truck-transportable, enabling deployment across AI data centers, industrial hubs, remote communities, and infrastructure facilities where traditional power solutions cannot deliver. Hadron is advancing the Halo MMR through an integrated program of technical development, NRC licensing engagement, and a growing portfolio of strategic supply chain and deployment partnerships. For more information, please visit www.hadronenergy.com.

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About GigCapital7 Corp.

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GigCapital7 Corp. is a Private-to-Public Equity (PPE)™ company, also known as a special purpose acquisition company (SPAC), with a Mentor-Investor™ methodology and a mission to partner with a high technology differentiating company to forge a successful path to the public markets through a business combination. Like all other GigCapital Private-to-Public Equity (PPE) entities, it aimed to partner with an innovative company with exceptional leaders in order to create an industry-leading partnership that will be successful for years to come, and hence is combining with Hadron Energy, Inc.

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Private-to-Public Equity (PPE)™ and Mentor-Investor™ are trademarks of GigManagement, LLC, a member entity of GigCapital Global and affiliate of GigCapital7 Corp., used pursuant to agreement.

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Forward-Looking Statements

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This press release includes certain statements that may be considered forward-looking statements within the meaning of the federal securities laws. Forward-looking statements include, without limitation, statements about future events or Hadron’s or GigCapital7’s future financial or operating performance. For example, statements regarding the benefits of the business combination between the parties and the anticipated timing of, and the funds expected to be available upon, the completion of the business combination are all forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may,” “should,” “could,” “might,” “plan,” “possible,” “project,” “strive,” “budget,” “forecast,” “expect,” “intend,” “will,” “estimate,” “anticipate,” “believe,” “predict,” “potential” or “continue,” or the negatives of these terms or variations thereof or similar terminology.

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These forward-looking statements regarding future events and the future results of Hadron and GigCapital7 are based upon estimates and assumptions that, while considered reasonable by Hadron, GigCapital7, and their respective management teams, are inherently uncertain and subject to risks, variability and contingencies, many of which are beyond Hadron’s or GigCapital7’s control. Factors that may cause actual results to differ materially from current expectations include, but are not limited to: the occurrence of any event, change or other circumstances that could give rise to the termination of the business combination agreement or other definitive agreements in connection thereto; the outcome of any legal proceedings that may be instituted against Hadron, GigCapital7 or others following the announcement of the business combination and any definitive agreements with respect thereto; the inability to complete the business combination due to the failure to obtain consents and approvals of the shareholders of GigCapital7; failure to obtain financing to complete the business combination or to satisfy other conditions to closing; delays or failures to obtain necessary regulatory approvals required to complete the business combination or related transactions; changes to the proposed structure of the business combination as a result of applicable laws, regulations or conditions; projections, estimates and forecasts of revenue and other financial and performance metrics; projections about industry trends and market opportunity; expectations relating to the demand for Hadron’s Halo MMR; Hadron’s ability to scale and grow its business; the cash position of Hadron following closing of the business combination; the ability to meet listing standards in connection with, and following, the consummation of the business combination the risk that the business combination disrupts current plans and operations of Hadron as a result of the announcement and consummation of the business combination; the ability to recognize the anticipated benefits of the business combination, which may be affected by, among other things, competition, the ability of Hadron to successfully commercialize its Halo MMR, and Hadron’s ability to source and maintain key relationships with management and key employees; costs related to the business combination; changes in applicable laws and regulations; political and economic developments and market volatility; the risk that Hadron does not ever enter into any definitive agreements in connection with commercialization of its technology; the risk that Hadron is pursuing an emerging market; and other risks and uncertainties set forth under “Risk Factors” and other documents filed, or to be filed, with the SEC by GigCapital7 and/or Hadron, including the registration statement that Hadron and GigCapital7 filed in connection with the business combination (the “Registration Statement”).