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American Critical Resources and Plum Acquisition Corp. IV Announce Letter of Intent for Proposed Business Combination

American Critical Resources (ACR) | Dec. 19, 2025

By Victor Perez

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American Critical Resources (ACR) and Plum Acquisition Corp. IV have signed a non-binding letter of intent for a proposed business combination aimed at advancing U.S. energy and critical minerals security. ACR is primarily focused on developing geothermal lithium resources at the Salton Sea in California to generate renewable energy and lithium carbonate. The collaboration with Plum IV is anticipated to expedite ACR's development timeline and bolster its positioning in the U.S. energy and minerals sector.

Strategic Importance of ACR

ACR's undertaking at Hell's Kitchen in California holds strategic significance for energy security and critical minerals in the U.S. The project is crucial for reducing dependence on foreign sources and enhancing domestic resource capabilities.

Partnerships and Investments

The project has successfully attracted over US$285 million in private investments, showcasing investor confidence in ACR's vision and execution capabilities. Additionally, ACR has demonstrated progress in its minerals extraction processes, signaling operational viability.

Additional Critical Minerals

ACR's research efforts extend beyond lithium to identify and extract other critical minerals essential for U.S. national security. Diversifying mineral extraction aligns with national interests, fortifying the country's resource base and resilience against supply chain vulnerabilities.

  • The proposed business combination signifies a strategic convergence between U.S. policy objectives and private sector initiatives in the energy and minerals domain. ACR's proactive approach to partnering with Plum IV reflects a strategic intent to leverage external expertise and capital market access for accelerated growth. The collaboration is poised to enhance ACR's competitive edge and innovation capabilities, positioning the entity as a key player in advancing U.S. energy security and minerals independence.

The collaboration between American Critical Resources and Plum Acquisition Corp. IV represents a significant leap towards strengthening U.S. energy and minerals leadership. By aligning with national priorities in energy security and defense, the partnership aims to drive sustainable shareholder value creation. ACR's strategic initiatives underscore a proactive response to increasing demand for renewable energy sources and critical minerals, aligning with broader sustainability and national security imperatives.