UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
CURRENT REPORT
Pursuant to Section 13 or Section 15(d) of the
Securities Exchange Act of 1934
Date of Report (Date of earliest event reported):
May 18, 2026 (May 15, 2026)
PLUM ACQUISITION CORP. IV
(Exact name of registrant as specified in its
charter)
| Cayman Islands |
|
001-42472 |
|
98-1795710 |
(State or other jurisdiction of
incorporation or organization) |
|
(Commission File Number) |
|
(I.R.S. Employer
Identification Number) |
|
2021 Fillmore St. #2089
San Francisco, California |
|
94115 |
| (Address of principal executive offices) |
|
(Zip Code) |
Registrant’s telephone number, including
area code: (929) 529-7125
Not Applicable
(Former name or former address, if changed since
last report)
Check the appropriate box below if the Form 8-K
filing is intended to simultaneously satisfy the filing obligation to the registrant under any of the following provisions:
| ☒ |
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |
| |
|
| ☐ |
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |
| |
|
| ☐ |
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |
| |
|
| ☐ |
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) |
Securities registered pursuant to Section 12(b) of the Act:
| Title of each class |
|
Trading Symbol(s) |
|
Name of each exchange on which registered |
| Units, each consisting of one Class A ordinary share, par value $0.0001 per share, and one-half of one redeemable warrant |
|
PLMKU |
|
Nasdaq Global Market |
| Class A ordinary shares, par value $0.0001 per share, included as part of the units |
|
PLMK |
|
Nasdaq Global Market |
| Warrants included as part of the units, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 |
|
PLMKW |
|
Nasdaq Global Market |
Indicate by check mark whether the registrant
is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934.
Emerging growth company ☒
If an emerging growth company, indicate by check
mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting
standards provided pursuant to Section 13(a) of the Exchange Act.
Item 1.01. Entry into a Material Definitive Agreement.
As previously disclosed,
on March 8, 2026, Plum Acquisition Corp. IV, a Cayman Islands exempted company (which will transfer by way of continuation from the Cayman
Islands to the State of Delaware and domesticate as a Delaware corporation prior to the Closing (as defined below)) (“Plum IV”),
Plum IV Merger Sub, Inc., a Delaware corporation and a direct wholly owned subsidiary of Plum IV (“Merger Sub”), and
Controlled Thermal Resources Holdings Inc., a Delaware corporation (the “Company”) entered into a Business Combination
Agreement (the “Business Combination Agreement”, and the transactions contemplated thereby, the “Transactions”),
pursuant to which, among other things and subject to the terms and conditions contained therein, Merger Sub will merge with and into the
Company, with the Company continuing as the surviving company.
On May 15, 2026, Plum
IV, the Company and Merger Sub entered into an amendment to the Business Combination Agreement (the “BCA Amendment”),
which amends the Business Combination Agreement to, among other things, (i) extend the date by which the Company is required to deliver
financial statements and pro forma financial information of the Company required to be included in the proxy statement/prospectus from
May 15, 2026 to June 15, 2026 and June 30, 2026, respectively; (ii) extend the date by which Plum IV, the Company and Merger Sub are required
to make any filings or applications required under antitrust laws with respect to the Transactions from April 17, 2026 to July 31, 2026;
and (iii) extend the dates by which the Company is required to deliver certain material consents from May 7, 2026 to the dates listed
on Schedule 8.01(m) to the Business Combination Agreement.
The foregoing description
of the form of the BCA Amendment does not purport to be complete and is qualified in its entirety by reference to the full text of the
BCA Amendment, a copy of which is filed as Exhibit 10.1 to this Current Report on Form 8-K (“Current Report”), and
incorporated herein by reference.
Additional Information
and Where to Find It
In connection with the
Transactions, Plum IV and the Company intend to file with the SEC a registration statement on Form S-4 (the “Registration Statement”),
which will include a preliminary proxy statement of Plum IV as well as a preliminary prospectus relating to the offer of securities to
be issued to the stockholders of the Company (the “Proxy Statement/Prospectus”). After the Registration Statement
is declared effective, a definitive proxy statement and other relevant documents will be mailed to shareholders of Plum IV as of the
record date to be established for voting on the Transactions and other matters as described in the Proxy Statement/Prospectus. Plum IV
will also file other documents regarding the Transactions with the SEC. This Current Report does not contain all of the information that
should be considered concerning the Transactions and is not intended to form the basis of any investment decision or any other decision
in respect of the Transactions. BEFORE MAKING ANY VOTING OR INVESTMENT DECISION, SHAREHOLDERS OF PLUM IV AND OTHER INTERESTED PARTIES
ARE URGED TO READ, WHEN AVAILABLE, THE PRELIMINARY PROXY STATEMENT/PROSPECTUS, AND AMENDMENTS THERETO, AND THE DEFINITIVE PROXY STATEMENT/PROSPECTUS
AND ALL OTHER RELEVANT DOCUMENTS FILED OR THAT WILL BE FILED WITH THE SEC IN CONNECTION WITH PLUM IV’S SOLICITATION OF PROXIES
FOR THE EXTRAORDINARY GENERAL MEETING OF ITS SHAREHOLDERS TO BE HELD TO APPROVE THE TRANSACTIONS AND OTHER MATTERS AS DESCRIBED IN THE
PROXY STATEMENT/PROSPECTUS BECAUSE THESE DOCUMENTS WILL CONTAIN IMPORTANT INFORMATION ABOUT PLUM IV, the Company AND THE TRANSACTIONS.
Investors and security holders will also be able to obtain copies of the Registration Statement and the Proxy Statement/Prospectus and
all other documents filed or to be filed with the SEC by Plum IV, without charge, once available, on the SEC’s website at www.sec.gov
or by directing a request to: Plum Acquisition Corp. IV, 2021 Fillmore St., #2089, San Francisco, California 94115, Attention: Kanishka
Roy, or by email at plumir@icrinc.com.
Participants in
the Solicitation
Plum IV, the Company
and their respective directors and executive officers may be deemed participants under SEC rules in the solicitation of proxies from Plum
IV’s shareholders in connection with the Transactions. A list of the names of such directors and executive officers and information
regarding their interests in the Transactions and their ownership of Plum IV’s securities is, or will be, contained in Plum IV’s
filings with the SEC. Additional information regarding the interests of the persons who may, under SEC rules, be deemed participants in
the solicitation of proxies from Plum IV’s shareholders in connection with the Transactions, including the names and interests of
the Company’s directors and executive officers, will be set forth in the Proxy Statement/Prospectus, which is expected to be filed
by Plum IV and the Company with the SEC. Investors and security holders may obtain free copies of these documents as described above.
No Offer or Solicitation
This Current Report is
for informational purposes only and is not a proxy statement or solicitation of a proxy, consent or authorization with respect to any
securities or in respect of the Transactions and shall not constitute an offer to sell or exchange, or a solicitation of an offer to buy
or exchange the securities of Plum IV or the Company, or any commodity or instrument or related derivative, nor shall there be any sale
of any such securities in any state or jurisdiction in which such offer, solicitation, sale or exchange would be unlawful prior to registration
or qualification under the securities laws of any such state or jurisdiction. This Current Report 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 the Securities Act
or an exemption therefrom. Investors should consult with their counsel as to the applicable requirements for a purchaser to avail itself
of any exemption under the Securities Act.
Forward-Looking
Statements
This Current Report and
the exhibits attached hereto contain certain forward-looking statements within the meaning of the U.S. federal securities laws with
respect to the Transactions and the parties thereto. All statements contained in this Current Report other than statements of historical
fact, including, without limitation, statements regarding the Transactions between Plum IV and the Company; the anticipated benefits and
timing of the Transactions; expected trading of the combined company’s securities on the Nasdaq; the building of the Company’s
flagship Hell’s Kitchen Project; the anticipated benefits and timing of the Company’s flagship Hell’s Kitchen Project,
the combined company’s future financial performance; the ability of the combined company to execute its business strategy, its market
opportunity and positioning; and other statements regarding management’s intentions, beliefs, or expectations with respect to the
combined company’s future performance, are forward-looking statements.
Forward-looking statements
are often identified by the use of words such as “anticipate,” “believe,” “continue,” “could,”
“estimate,” “expect,” “intend,” “may,” “might,” “plan,” “potential,”
“predict,” “project,” “should,” “will,” “would,” and similar expressions,
but the absence of these words does not mean that a statement is not forward-looking.
These forward-looking
statements are based on the current expectations and assumptions of Plum IV and the Company and are subject to risks and uncertainties
that could cause actual results to differ materially from those expressed or implied by such forward-looking statements. Such risks and
uncertainties include, but are not limited to: (1) the occurrence of any event, change or other circumstances that could give rise to
the termination of the Business Combination Agreement; (2) the outcome of any legal proceedings that may be instituted against the parties
following the announcement of the Transactions and any definitive agreements with respect thereto; (3) the inability to complete the Transactions,
including due to failure to obtain approval of the shareholders of Plum IV and the Company or other conditions to closing; (4) the risk
that the Transactions may not be completed by Plum IV’s business combination deadline and the potential failure to obtain an extension
of the business combination deadline if sought by Plum IV; (5) the inability to maintain the listing of Plum IV’s securities or
to obtain or maintain the listing of the combined company’s securities on the Nasdaq, the New York Stock Exchange, or another national
securities exchange following the Transactions; (6) the risk that the Transactions disrupts the Company’s current plans, business
relationships, performance, operations and business generally as a result of the announcement and consummation of the Transactions; (7)
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, geopolitical tensions, and macro-economic and social environments affecting its business;
(8) the ability to recognize the anticipated benefits of the Transactions, which may be affected by, among other things, competition,
the ability of the combined company to grow and manage growth profitably and retain its key employees; (9) costs related to the Transactions;
(10) changes in applicable laws or regulations; (11) risks related to the Company’s business, including fluctuations in demand and
prices for lithium and other critical minerals, competition within the industry, the risks inherent in development projects and exploration
activities, potential delays or cost overruns in capital expenditures, the ability to secure necessary raw materials, compliance with
regulatory requirements, environmental and safety obligations, economic and market conditions, and political or geopolitical developments;
and (12) other risks detailed from time to time in Plum IV’s filings with the SEC, including the Registration Statement and related
documents filed or to be filed in connection with the Transactions.
The foregoing list
of risk factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties
described in the “Risk Factors” section of Plum IV’s Annual Report on Form 10-K filed with the SEC on March 31,
2026, Plum IV’s Quarterly Report on Form 10-Q filed with the SEC on May 15, 2026, subsequent Quarterly Reports on Form 10-Q and the
Registration Statement and Proxy Statement/Prospectus that will be filed by Plum IV and the Company, and other documents filed by
Plum IV from time to time with the SEC, as well as the list of risk factors included herein. These filings identify and address
other important risks and uncertainties that could cause actual results to differ materially from those contained in the
forward-looking statements. Additional risks and uncertainties not currently known or that are currently deemed immaterial may also
cause actual results to differ materially from those expressed or implied by such forward-looking statements. Readers are cautioned
not to put undue reliance on forward-looking statements, and none of the parties or any of their representatives assumes any
obligation and do not intend to update or revise these forward-looking statements, each of which is made only as of the date of this
Current Report.
Item 9.01. Financial Statements and Exhibits.
(c) Exhibits.
| Exhibit No. |
|
Description |
| 10.1† |
|
Amendment No. 1 to the
Business Combination Agreement, dated May 15, 2026, by and among Plum Acquisition Corp. IV, Plum IV Merger Sub Inc. and Controlled
Thermal Resources Holdings Inc. |
| 104 |
|
Cover Page Interactive Data File (embedded within the Inline XBRL document) |
| † |
Certain of the exhibits and schedules to this exhibit have been omitted in accordance with Regulation S-K Item 601(b)(2). The Registrant agrees to furnish supplementally a copy of all omitted exhibits and schedules to the SEC upon its request. |
SIGNATURE
Pursuant to the requirements
of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto
duly authorized.
| Date: May 18, 2026 |
PLUM ACQUISITION CORP. IV |
| |
|
|
| |
By: |
/s/ Kanishka Roy |
| |
Name: |
Kanishka Roy |
| |
Title: |
Chief Executive Officer |
