Filed by Spring Valley Acquisition Corp. III
pursuant to Rule 425 under the Securities Act
of 1933
and deemed filed pursuant to Rule 14a-12
under the Securities Exchange Act of 1934
Subject Company: Spring Valley Acquisition Corp.
III
Commission File No. 001-42822
Subject Company: General Fusion Inc.
Date: June 9, 2026
This filing relates to the proposed transactions
pursuant to the terms of that certain Business Combination Agreement, dated January 21, 2026 (the “Business Combination Agreement”),
among Spring Valley Acquisition Corp. III, an exempted company limited by shares incorporated under the Laws of the Cayman Islands (“SVAC”);
General Fusion Inc., a British Columbia limited company (“General Fusion” or the “Company”), and 1573562 B.C.
Ltd., a British Columbia limited company (“NewCo”), pursuant to which, among other things, (i) SVAC will continue from the
Cayman Islands to British Columbia, (ii) NewCo will amalgamate with and into General Fusion (the “Amalgamation”), with NewCo
surviving the Amalgamation as a wholly-owned subsidiary of SVAC, pursuant to an arrangement under the applicable provisions of the Business
Corporations Act (British Columbia) and the plan of arrangement attached as an exhibit to the Business Combination Agreement,
and (iii) SVAC will change its name to “General Fusion Group Ltd.”
On June 9, 2026, the following press release
was issued on behalf of General Fusion:
General Fusion Named World’s Top GreenTech
Company of 2026 by TIME
Recognition highlights the Company’s progress
toward commercial fusion energy as it advances plans to become a public company
VANCOUVER, British Columbia – June 9,
2026 – General Fusion Inc. (“General Fusion” or the “Company”) has ranked first on TIME’s prestigious
list of the World’s Top GreenTech Companies of 2026, a recognition for its innovation in fusion energy. The honor comes as General
Fusion advances toward becoming a publicly listed company through its previously announced proposed business combination with Spring Valley
Acquisition Corp. III (“Spring Valley”) (NASDAQ: SVAC).
“Being named TIME’s top GreenTech
company of 2026 is a testament to the incredible work of our team and a recognition of our innovative approach to transforming the world’s
energy supply through fusion energy,” said Greg Twinney, Chief Executive Officer of General Fusion. “For more than 20 years,
we have been building and proving our technology. That experience has led to LM26, our world-first Magnetized Target Fusion demonstration
machine, now in operation. We’re on the path to industry-defining technical milestones to deliver practical fusion power in the
next decade.”
“We are honored to receive this recognition
at a pivotal moment in our journey to become the first publicly traded pure-play fusion company,” Twinney added. “Fusion has
the potential to reshape global energy markets, but success depends on practical engineering, disciplined investment, and a clear path
to commercialization. This award reflects our approach to developing fusion power plants that can deliver reliable, zero-carbon energy
at scale.”
Selected from more than 8,300 applicants worldwide,
General Fusion was recognized by TIME and Statista Inc. for the transformative potential of its technology, which uniquely addresses critical
barriers to practical fusion energy. Once commercialized, fusion has the potential to be a long-term solution to rising electricity demand,
energy security concerns, and decarbonization goals. The full list of honorees was announced today on TIME’s website. Statista publishes
global industry rankings and company lists with leading media partners, drawing on research from statista.com, its data and business intelligence
platform.
Quick Facts:
| · | General Fusion’s Magnetized Target Fusion
(“MTF”) is designed to solve significant barriers to commercializing fusion energy at a time when electricity demand is surging,
and nations around the world are racing to commercialize fusion power. |
| · | As a technology, MTF aims to achieve fusion in
a practical way, avoiding superconducting magnets and high-powered lasers, while enabling the use of existing materials for durable machines
that would produce cost-effective energy. |
| · | In early 2025, General Fusion announced that
it had designed, built, and begun operating its world-first Lawson Machine 26 (“LM26”) fusion demonstration machine in under
two years. LM26 is the first MTF demonstration machine to be built at a commercially relevant scale. It mechanically compresses plasma
with a lithium liner at 50% commercial-scale diameter. |
| · | LM26 aims to achieve key fusion technical milestones:
plasma heating to 1 keV (10 million degrees Celsius), then 10 keV (100 million degrees Celsius), and ultimately the Lawson criterion,
the combination of fusion parameters that can produce net fusion energy in the plasma. |
About General Fusion
General Fusion is pursuing a fast and practical
approach to commercial fusion energy and is headquartered in Vancouver, Canada. The Company was established in 2002 and is funded by
a global syndicate of leading energy venture capital firms, industry leaders, and technology pioneers. Learn more at www.generalfusion.com.
General Fusion announced in January 2026 that it plans to go public through the Proposed Business Combination with Spring Valley Acquisition
Corp. III (NASDAQ: SVAC).
About Spring Valley Acquisition Corp. III
Spring Valley Acquisition Corp. III is a part
of a family of investment vehicles formed for the purpose of acquiring or merging with a business focused on the Power infrastructure
and Decarbonization sectors. Over the past 5 years, Spring Valley has raised $920 million in four IPOs. Spring Valley I successfully
completed its business combination with NuScale Power Corporation, a leading U.S. small modular reactor (“SMR”) technology
company, and Spring Valley II successfully completed its business combination with Eagle Nuclear Energy Corp., a next-generation nuclear
energy company with rights to the largest open pit-constrained measured and indicated uranium deposit in the United States. SVAC maintains
a corporate website at https://sv-ac.com.
Cautionary Note Regarding Forward-Looking Statements
Certain statements included in this document
are not historical facts but are forward-looking statements for purposes of the safe harbor provisions under the United States Private
Securities Litigation Reform Act of 1995. All statements other than statements of historical facts contained in this document are forward-looking
statements. Any statements that refer to projections, forecasts or other characterizations of future events or circumstances, including
any underlying assumptions, are also forward-looking statements. In some cases, you can identify forward-looking statements by words
such as “estimate,” “plan,” “project,” “forecast,” “intend,” “expect,”
“anticipate,” “believe,” “seek,” “strategy,” “future,” “opportunity,”
“may,” “target,” “should,” “will,” “would,” “will be,” “will
continue,” “will likely result,” “preliminary,” or similar expressions that predict or indicate future
events or trends or that are not statements of historical matters, but the absence of these words does not mean that a statement is not
forward-looking. Forward-looking statements include, without limitation, SVAC’s, General Fusion’s, or their respective management
teams’ expectations concerning General Fusion’s plan to go public through a business combination with SVAC and expected benefits
or timing thereof (the transactions contemplated by the business combination, collectively, the “Proposed Business Combination”);
the outlook for General Fusion’s business, including its ability to commercialize MTF or any other fusion technology on its expected
timeline or at all; statements regarding the current and expected results of General Fusion’s LM26 program; the ability to execute
General Fusion’s strategies, including on any expected timeline or anticipated cost basis; projected and estimated financial performance;
anticipated industry trends; future capital expenditures; government regulation of fusion energy; and environmental risks; as well as
any information concerning possible or assumed future results of operations of General Fusion. The forward-looking statements are based
on the current expectations of the respective management teams of SVAC and General Fusion, as applicable, and are inherently subject
to uncertainties and changes in circumstance and their potential effects. There can be no assurance that future developments will be
those that have been anticipated. These forward-looking statements involve a number of risks, uncertainties or other assumptions that
may cause actual results or performance to be materially different from those expressed or implied by these forward-looking statements.
These risks and uncertainties include, but are not limited to, (i) the risk that the Proposed Business Combination may not be completed
in a timely manner or at all, which may adversely affect the price of SVAC’s securities; (ii) the failure to satisfy the conditions
to the consummation of the Proposed Business Combination, including the adoption of the business combination agreement, dated January
21, 2026, among General Fusion, SVAC, and the other party thereto (the “Business Combination Agreement”) by the shareholders
of SVAC and the receipt of regulatory approvals; (iii) market risks; (iv) the occurrence of any event, change or other circumstance that
could give rise to the termination of the Business Combination Agreement; (v) the effect of the announcement or pendency of the Proposed
Business Combination on General Fusion’s business relationships, performance, and business generally; (vi) risks that the Proposed
Business Combination disrupts current plans of General Fusion and potential difficulties in its employee retention as a result of the
Proposed Business Combination; (vii) the outcome of any legal proceedings that may be instituted against General Fusion or SVAC related
to the Business Combination Agreement or the Proposed Business Combination; (viii) failure to realize the anticipated benefits of the
Proposed Business Combination; (ix) the inability to maintain the listing of SVAC’s securities or to meet listing requirements
and maintain the listing of the combined company’s securities on Nasdaq; (x) the risk that the Proposed Business Combination may
not be completed by SVAC’s business combination deadline and the potential failure to obtain an extension of the business combination
deadline if sought by SVAC; (xi) the risk that the price of the combined company’s securities may be volatile due to a variety
of factors, including changes in laws, regulations, technologies, natural disasters, national security tensions, and macro-economic and
social environments affecting its business; (xii) laws and regulations governing General Fusion’s research and development activities,
and changes in such laws and regulations; (xiii) any failure to commercialize MTF on the expected timeline or at all, including any failure
to achieve the objectives of the LM26 program; (xiv) environmental regulations and legislation; (xv) the effects of climate change, extreme
weather events, water scarcity, and seismic events, and the effectiveness of strategies to deal with these issues; (xvi) fluctuations
in currency markets; (xvii) General Fusion’s ability to complete and successfully integrate any future acquisitions; (xviii) increased
competition in the fusion industry; (xix) limited supply of materials and supply chain disruptions; and (xx) the risk that the proposed
private placement of convertible preferred shares and warrants by General Fusion (the “PIPE Financing”) may not be completed,
or that other capital needed by the combined company may not be raised on favorable terms, or at all, including as a result of the restrictions
agreed to in connection with the PIPE Financing. The foregoing list is not exhaustive, and there may be additional risks that neither
SVAC nor General Fusion presently know or that SVAC and General Fusion currently believe are immaterial. You should carefully consider
the foregoing factors, any other factors discussed in this document and the other risks and uncertainties described in the “Risk
Factors” section of SVAC’s final prospectus for its initial public offering, which was filed with the SEC on September 4,
2025 (the “Final Prospectus”); the risks described in the joint registration statement on Form F-4 filed by General Fusion
and SVAC, as amended (the “Registration Statement”), which includes a preliminary proxy statement/prospectus, or to be described
in any amendment or supplement thereto; and those discussed and identified in filings made with the SEC by SVAC from time to time. General
Fusion and SVAC caution you against placing undue reliance on forward-looking statements, which reflect current beliefs and are based
on information currently available as of the date a forward-looking statement is made. Forward-looking statements set forth in this document
speak only as of the date of this document. Neither General Fusion nor SVAC undertakes any obligation to revise forward-looking statements
to reflect future events, changes in circumstances, or changes in beliefs. In the event that any forward-looking statement is updated,
no inference should be made that General Fusion or SVAC will make additional updates with respect to that statement, related matters,
or any other forward-looking statements. Any corrections or revisions and other important assumptions and factors that could cause actual
results to differ materially from forward-looking statements, including discussions of significant risk factors, may appear, up to the
consummation of the Proposed Business Combination, in SVAC’s public filings with the SEC, which are or will be (as applicable)
accessible at www.sec.gov, and which you are advised to review carefully.
Important Information for Investors and Shareholders
In connection with the Proposed Business Combination,
General Fusion and SVAC filed with the SEC the Registration Statement, which includes a preliminary prospectus with respect to SVAC’s
securities to be issued in connection with the Proposed Business Combination and a preliminary proxy statement in connection with SVAC’s
solicitation of proxies for the vote by SVAC’s shareholders with respect to the Proposed Business Combination and other matters
described in the Registration Statement (the “Proxy Statement”). After the SEC declares the Registration Statement effective,
SVAC plans to file the definitive Proxy Statement with the SEC and to mail copies to SVAC’s shareholders as of a record date to
be established for voting on the Proposed Business Combination. This document does not contain all the information that should be considered
concerning the Proposed Business Combination and is not a substitute for the Registration Statement, Proxy Statement or for any other
document that SVAC has filed or may file with the SEC. Before making any investment or voting decision, investors and security holders
of SVAC and General Fusion are urged to read the Registration Statement and the Proxy Statement, and any amendments or supplements thereto,
as well as all other relevant materials filed or that will be filed with the SEC in connection with the Proposed Business Combination
as they become available because they will contain important information about General Fusion, SVAC and the Proposed Business Combination.
Investors and security holders are able to obtain free copies of the Registration Statement, the Proxy Statement and all other relevant
documents filed or that will be filed with the SEC by SVAC through the website maintained by the SEC at www.sec.gov. In addition,
the documents filed by SVAC may be obtained free of charge from SVAC’s website at https://sv-ac.com or by directing a request
to Spring Valley Acquisition Corp. III, Attn: Corporate Secretary, 2100 McKinney Avenue, Suite 1675, Dallas, Texas 75201. The information
contained on, or that may be accessed through, the websites referenced in this document is not incorporated by reference into, and is
not a part of, this document.
Participants in the Solicitation
General Fusion, SVAC and their respective directors,
executive officers and other members of management and employees may, under the rules of the SEC, be deemed to be participants in the
solicitations of proxies from SVAC’s shareholders in connection with the Proposed Business Combination. For more information about
the names, affiliations and interests of SVAC’s directors and executive officers, please refer to the Final Prospectus and the Registration
Statement, Proxy Statement and other relevant materials filed or to be filed with the SEC in connection with the Proposed Business Combination
when they become available. Additional information regarding the participants in the proxy solicitation and a description of their direct
and indirect interests, which may, in some cases, be different than those of SVAC’s shareholders generally, will be included in
the Registration Statement and the Proxy Statement, when they become available. Shareholders, potential investors and other interested
persons should read the Registration Statement and the Proxy Statement carefully, when they become available, before making any voting
or investment decisions. You may obtain free copies of these documents from the sources indicated above.
No Offer or Solicitation
This document shall not constitute a “solicitation”
as defined in Section 14 of the Securities Exchange Act of 1934, as amended. This document shall not constitute an offer to sell or exchange,
the solicitation of an offer to buy or a recommendation to purchase, any securities, or a solicitation of any vote, consent or approval,
nor shall there be any sale, issuance or transfer of securities in any jurisdiction in which such offer, solicitation or sale may be unlawful
under the laws of such jurisdiction. No offering of securities in the Proposed Business Combination shall be made except by means of a
prospectus meeting the requirements of the Securities Act of 1933, as amended, or an exemption therefrom.
Investor Relations Contact:
You can contact General Fusion’s Investor
Relations team by email at: investors@generalfusion.com.
If you are based in North America, you may also
leave a toll-free voicemail at +1 (833) 717-1519. Callers outside North America can reach us at +1 (236) 253-6968.
Media Relations Contact:
media@generalfusion.com
1-866-904-0995
***
On June 9, 2026, General Fusion posted the following communication
on its LinkedIn, X, Facebook, and Instagram accounts:
#1 in the world.
General Fusion has been named the World’s Top GreenTech Company
by TIME Magazine!
Selected from more than 8,300 applicants worldwide, General Fusion
was recognized by @ TIME and @ Statista Inc. for the transformative potential of its technology, which uniquely
addresses critical barriers to practical fusion energy.
Once commercialized, fusion has the potential to be a long-term solution to rising
electricity demand, energy security concerns, and decarbonization goals.
“We are honored to receive this recognition
at a pivotal moment in our journey to become the first publicly traded pure-play fusion company,” said Greg Twinney, CEO of
General Fusion. “Fusion has the potential to reshape global energy markets, but success depends on practical engineering, disciplined
investment, and a clear path to commercialization. This award reflects our approach to developing fusion power plants that can deliver
reliable, zero-carbon energy at scale.”
Read more: [link to news release]

***
Additional Information and Where to Find It
In connection with the transactions contemplated
by the Business Combination Agreement (the “Proposed Business Combination”), the Company and SVAC filed their joint registration
statement on Form F-4 (as amended, the “Registration Statement”) with the U.S. Securities and Exchange Commission (the “SEC”),
which includes a preliminary prospectus with respect to SVAC’s securities to be issued in connection with the Proposed Business
Combination and a preliminary proxy statement in connection with SVAC’s solicitation of proxies for the vote by SVAC’s shareholders
with respect to the Proposed Business Combination and other matters to be described in the Registration Statement (the “Proxy Statement”).
After the SEC declares the Registration Statement effective, SVAC plans to file the definitive Proxy Statement with the SEC and to mail
copies to SVAC’s shareholders as of a record date to be established for voting on the Proposed Business Combination. This document
does not contain all the information that should be considered concerning the Proposed Business Combination and is not a substitute for
the Registration Statement, Proxy Statement or for any other document that SVAC has filed or may file with the SEC. Before making any
investment or voting decision, investors and security holders of SVAC and General Fusion are urged to read the Registration Statement
and the Proxy Statement, and any amendments or supplements thereto, as well as all other relevant materials filed or that will be filed
with the SEC in connection with the Proposed Business Combination as they become available because they will contain important information
about General Fusion, SVAC and the Proposed Business Combination. Investors and security holders are able to obtain free copies of the
Registration Statement, the Proxy Statement and all other relevant documents filed or that will be filed with the SEC by SVAC through
the website maintained by the SEC at www.sec.gov. In addition, the documents filed by SVAC may be obtained free of charge from SVAC’s
website at https://sv-ac.com or by directing a request to Spring Valley Acquisition Corp. III, Attn: Corporate Secretary, 2100 McKinney
Avenue, Suite 1675, Dallas, Texas 75201. The information contained on, or that may be accessed through, the websites referenced in
this document is not incorporated by reference into, and is not a part of, this document.
Participants in the Solicitation
General Fusion, SVAC and their respective directors,
executive officers and other members of management and employees may, under the rules of the SEC, be deemed to be participants in
the solicitations of proxies from SVAC’s shareholders in connection with the Proposed Business Combination. For more information
about the names, affiliations and interests of SVAC’s directors and executive officers, please refer to the final prospectus from
SVAC’s initial public offering, which was dated September 3, 2025 and filed with the SEC on September 4, 2025 (the “Final
Prospectus”) and the Registration Statement, Proxy Statement and other relevant materials filed or to be filed with the SEC
in connection with the Proposed Business Combination when they become available. Additional information regarding the participants in
the proxy solicitation and a description of their direct and indirect interests, which may, in some cases, be different than those of
SVAC’s shareholders generally, will be included in the Registration Statement and the Proxy Statement, when they become available.
Shareholders, potential investors and other interested persons should read the Registration Statement and the Proxy Statement carefully,
when they become available, before making any voting or investment decisions. You may obtain free copies of these documents from the sources
indicated above.
No Offer or Solicitation
This document shall not constitute a “solicitation”
as defined in Section 14 of the Securities Exchange Act of 1934, as amended. This document shall not constitute an offer to sell
or exchange, the solicitation of an offer to buy or a recommendation to purchase, any securities, or a solicitation of any vote, consent
or approval, nor shall there be any sale, issuance or transfer of securities in any jurisdiction in which such offer, solicitation or
sale may be unlawful under the laws of such jurisdiction. No offering of securities in the Proposed Business Combination shall be made
except by means of a prospectus meeting the requirements of the Securities Act of 1933, as amended, or an exemption therefrom.
Cautionary Note Regarding Forward-Looking Statements
Certain statements included in this document are
not historical facts but are forward-looking statements for purposes of the safe harbor provisions under the United States Private Securities
Litigation Reform Act of 1995. All statements other than statements of historical facts contained in this document are forward-looking
statements. Any statements that refer to projections, forecasts or other characterizations of future events or circumstances, including
any underlying assumptions, are also forward-looking statements. In some cases, you can identify forward-looking statements by words such
as “estimate,” “plan,” “project,” “forecast,” “intend,” “expect,”
“anticipate,” “believe,” “seek,” “strategy,” “future,” “opportunity,”
“may,” “target,” “should,” “will,” “would,” “will be,” “will
continue,” “will likely result,” “preliminary,” or similar expressions that predict or indicate future events
or trends or that are not statements of historical matters, but the absence of these words does not mean that a statement is not forward-looking.
Forward-looking statements include, without limitation, SVAC’s, General Fusion’s, or their respective management teams’
expectations concerning the Proposed Business Combination and expected benefits or timing thereof; the outlook for General Fusion’s
business, including its ability to commercialize magnetized target fusion (“MTF”) or any other fusion technology on its expected
timeline or at all; statements regarding the current and expected results of General Fusion’s Lawson Machine (“LM26”)
program; the ability to execute General Fusion’s strategies, including on any expected timeline or anticipated cost basis; projected
and estimated financial performance; anticipated industry trends; future capital expenditures; government regulation of fusion energy;
and environmental risks; as well as any information concerning possible or assumed future results of operations of General Fusion. The
forward-looking statements are based on the current expectations of the respective management teams of SVAC and General Fusion, as applicable,
and are inherently subject to uncertainties and changes in circumstance and their potential effects. There can be no assurance that future
developments will be those that have been anticipated. These forward-looking statements involve a number of risks, uncertainties or other
assumptions that may cause actual results or performance to be materially different from those expressed or implied by these forward-looking
statements. These risks and uncertainties include, but are not limited to, (i) the risk that the Proposed Business Combination may
not be completed in a timely manner or at all, which may adversely affect the price of SVAC’s securities; (ii) the failure
to satisfy the conditions to the consummation of the Proposed Business Combination, including the adoption of the Business Combination
Agreement by the shareholders of SVAC and the receipt of regulatory approvals; (iii) market risks; (iv) the occurrence of any
event, change or other circumstance that could give rise to the termination of the Business Combination Agreement; (v) the effect
of the announcement or pendency of the Proposed Business Combination on General Fusion’s business relationships, performance, and
business generally; (vi) risks that the Proposed Business Combination disrupts current plans of General Fusion and potential difficulties
in its employee retention as a result of the Proposed Business Combination; (vii) the outcome of any legal proceedings that may be
instituted against General Fusion or SVAC related to the Business Combination Agreement or the Proposed Business Combination; (viii) failure
to realize the anticipated benefits of the Proposed Business Combination; (ix) the inability to maintain the listing of SVAC’s
securities or to meet listing requirements and maintain the listing of the combined company’s securities on Nasdaq; (x) the
risk that the Proposed Business Combination may not be completed by SVAC’s business combination deadline and the potential failure
to obtain an extension of the business combination deadline if sought by SVAC; (xi) the risk that the price of the combined company’s
securities may be volatile due to a variety of factors, including changes in laws, regulations, technologies, natural disasters, national
security tensions, and macro-economic and social environments affecting its business; (xii) laws and regulations governing General
Fusion’s research and development activities, and changes in such laws and regulations; (xiii) any failure to commercialize
MTF on the expected timeline or at all, including any failure to achieve the objectives of the LM26 program; (xiv) environmental
regulations and legislation; (xv) the effects of climate change, extreme weather events, water scarcity, and seismic events, and
the effectiveness of strategies to deal with these issues; (xvi) fluctuations in currency markets; (xvii) General Fusion’s
ability to complete and successfully integrate any future acquisitions; (xviii) increased competition in the fusion industry; (xix) limited
supply of materials and supply chain disruptions; and (xx) the risk that the proposed private placement of convertible preferred
shares and warrants by General Fusion (the “PIPE Financing”) may not be completed, or that other capital needed by the combined
company may not be raised on favorable terms, or at all, including as a result of the restrictions agreed to in connection with the PIPE
Financing. The foregoing list is not exhaustive, and there may be additional risks that neither SVAC nor General Fusion presently know
or that SVAC and General Fusion currently believe are immaterial. You should carefully consider the foregoing factors, any other factors
discussed in this document and the other risks and uncertainties described in the “Risk Factors” section of the Final Prospectus
and the risks described in the Registration Statement, which includes a preliminary proxy statement/prospectus, or to be described in
any amendment or supplement thereto; and those discussed and identified in filings made with the SEC by SVAC from time to time. General
Fusion and SVAC caution you against placing undue reliance on forward-looking statements, which reflect current beliefs and are based
on information currently available as of the date a forward-looking statement is made. Forward-looking statements set forth in this document
speak only as of the date of this document. Neither General Fusion nor SVAC undertakes any obligation to revise forward-looking statements
to reflect future events, changes in circumstances, or changes in beliefs. In the event that any forward-looking statement is updated,
no inference should be made that General Fusion or SVAC will make additional updates with respect to that statement, related matters,
or any other forward-looking statements. Any corrections or revisions and other important assumptions and factors that could cause actual
results to differ materially from forward-looking statements, including discussions of significant risk factors, may appear, up to the
consummation of the Proposed Business Combination, in SVAC’s public filings with the SEC, which are or will be (as applicable) accessible
at www.sec.gov, and which you are advised to review carefully.