Company: GIGGU
Filing Date: 2025-09-29
Form Type: 425
Source: 0001193125-25-221783
Chunk: 255

Company: GigCapital7 Corp.
Filing Date: 2025-09-29
Form: 425
Chunk 255
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 in pre-application activities. Shortly thereafter, the company filed their Regulatory Engagement Plan (REP) and Quality
Assurance Program Description (QAPD) to the NRC.

Over the last year, Samuel Gibson, Hadron’s Founder and Chief Executive Officer, has assembled a
highly experienced management team with over 140 years of combined nuclear expertise across nuclear engineering, core design, system safety and reactor operations. In addition, the team brings a long history of regulatory compliance experience and
successful project oversight. For more information about Hadron’s management team, please visit https://www.hadronenergy.com/.

“Hadron has made meaningful progress withtheir differentiated and innovative MMR
design, and we are thrilled to be partnering with the company as it embarks on the journey as a public company, executing again our Mentor-Investor methodology. We are confident in their
product and believe there are robust opportunities for deployment as the demand for energy grows at a rapid clip,” said Dr. Avi Katz, Executive Chairman and CEO of GIG and Founding Managing Partner of GIG’s sponsor group, GigCapital
Global. “The need for clean, baseload energy is critical to enable the technologies and initiatives that will not only drive economic growth, prosperity and competitiveness, but will also promote sustainable solutions for current and future
generations and serve as a foundation for both energy security and national security. Hadron is poised to move quickly to execute on its ambitious business plan, making it the ideal strategic partner to
high-end users of electricity. We have high confidence in the proposed transaction between GIG and Hadron, and we are looking forward to jointly building a company that will deliver meaningful value and
purpose for the world-wide communities and for its partners and stakeholders for years to come.”

Transaction Summary

The proposed Business Combination contemplates that the existing security holders of Hadron will receive 100 million shares of GIG stock, valuing the
public Hadron prior to the raising of any public capital at approximately $1.2 billion. Upon closing of the Business Combination, it is anticipated that Hadron will have access to approximately $200 million in cash from the GIG trust
account after the payment of transaction expenses and assuming no redemptions by GIG’s public shareholders.

Hadron’s existing management team
will continue to lead the combined company following the completion of the Business Combination. Hadron’s security holders will roll 100% of their equity holdings into the new public company. Additionally, GIG’s sponsor and certain key