Company: GIGGU
Filing Date: 2025-10-30
Form Type: 425
Source: 0001193125-25-257513
Chunk: 0

Company: GigCapital7 Corp.
Filing Date: 2025-10-30
Form: 425
Chunk 0
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Filed by GigCapital7 Corp.

Pursuant to Rule 425 under the Securities Act of 1933

Commission File No.: 001-42262

Subject Company: GigCapital7 Corp.

Behind the
Technology: How Hadron Energy’s ‘Halo’ Microreactor is Designed to Deliver 24/7 Clean Power

SAN FRANCISCO, CA – Hadron
Energy, Inc. (“Hadron”), an advanced nuclear technology company, today revealed new details about the engineering and safety innovations powering its flagship 10 megawatt-electric (“MWe”) Micro-Modular Reactor
(“MMR”), the “Hadron Halo”.

The Hadron Halo is a compact, factory-built light-water reactor that will deliver continuous,
carbon-free power for up to 10 years without refueling with a 50-year useful life.Unlike experimental designs that rely on unproven coolants or fuels, the Hadron Halo uses familiar pressurized-water reactor (“PWR”) technology, the same proven foundation that powers every operating commercial reactor in the United States and 95% of all commercial nuclear power plants worldwide (1).
By building on this mature platform, Hadron combines many decades of safety data, licensing, operating, and an existing global supply chain with a new, modular architecture engineered for simplicity and speed.

“Most so-called next-generation reactors have never been deployed commercially at scale and are still
reinventing the wheel (2),” said Ross Ridenoure, Chief Nuclear Officer of Hadron Energy. “Our approach is different. We took the most commonly used reactor type in the world and reduced its size to a transportable scale. By utilizing
already-approved and familiar light-water reactor technology into our design, we believe this will create shorter licensing timelines, lower costs, and faster deployment of reliable clean power.”

Each Hadron Halo unit will produce 10 MWe and occupy less than one acre, a fraction of the land required for wind or solar projects of similar output. The
sealed reactor core will operate at lower power density than traditional plants, which will reduce mechanical stress and extend component life. All primary-loop equipment, including the reactor core, pumps, and steam generator, is housed inside a
single pressure vessel. This configuration minimizes external piping and will virtually eliminate the possibility of a large-break coolant accident.

The
Hadron Halo will be fueled by Low-Enriched Uranium Plus (LEU+), a slightly higher-enriched version of standard commercial nuclear fuel that is already