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Plum Acquisition Corp. IV announced it has entered into a definitive business combination agreement with Controlled Thermal Resources Holdings Inc. (CTR), an emerging U.S. developer of geothermal power and critical minerals. The deal would make CTR a public company listed on Nasdaq under the ticker “CTRH”.
CTR’s Hell’s Kitchen Project in California is designed to supply up to 650 MW of renewable baseload power and about 100,000 metric tons per year of lithium carbonate at full scale, plus large volumes of potash and other critical minerals. CTR has raised over US$285 million in private capital, completed a definitive feasibility study for Stage 1, secured a conditional use permit, and invested about $185 million in long‑lead equipment. The transaction, unanimously approved by both boards, is expected to close in the second half of 2026, subject to shareholder approvals, regulatory clearances, and other customary conditions, with a pro forma enterprise value of roughly $4.7 billion and CTR holders expected to own about 90.6% of the combined company.
Plum Acquisition Corp. IV filed a current report describing its ongoing discussions with American Critical Resources, LLC (ACR), a subsidiary of Controlled Thermal Resources Holdings Inc., under a non-binding letter of intent for a potential business combination.
The company furnished an ACR investor presentation as Exhibit 99.1, providing an overview of ACR. The filing stresses that there is no assurance a definitive agreement will be reached or that any transaction will be completed, as it would require due diligence, negotiated terms, shareholder and regulatory approvals, and other customary conditions.
If a definitive agreement is later signed, a registration statement on Form S-4 with a proxy statement/prospectus would be prepared for Plum shareholders. The report also includes extensive forward-looking statement and risk factor language and clarifies that it is not an offer or solicitation to buy or sell securities.
Plum Acquisition Corp. IV filed a current report describing its ongoing discussions for a potential business combination with American Critical Resources, LLC (ACR), a subsidiary of Controlled Thermal Resources Holdings Inc. The parties currently have only a non-binding letter of intent, not a definitive merger agreement.
The company furnished an ACR overview investor presentation as Exhibit 99.1 under Regulation FD. The report stresses there is no assurance a definitive agreement will be reached or that any transaction will close, noting numerous required conditions, including due diligence, board and equity holder approvals, regulatory clearances and financing.
Plum Acquisition Corp. IV filed its quarterly report showing it remains a pre-revenue SPAC focused on completing an initial business combination. The company reported net income of $1,679,645, driven by $1,913,171 of interest on funds invested in its trust account, offset by $236,000 in general and administrative expenses.
Following its January 2025 IPO of 17,250,000 units at $10.00 each, Plum held $179,493,580 in the trust account as of September 30, 2025 and had $469,208 in cash for working capital. The filing notes a $6,900,000 deferred underwriting fee and 8,961,438 warrants outstanding with an exercise price of $11.50 per share. Management disclosed substantial doubt about the company’s ability to continue as a going concern if no business combination is completed within the 18‑month combination period ending July 16, 2026. As of November 12, 2025, Class A shares outstanding were 18,492,875 and Class B were 5,750,000.