---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-123850"
form_type: "8-K"
ticker: "PLMK"
cik: "0002030482"
company_name: "Plum Acquisition Corp, IV"
filed_at: "2025-12-19T23:59:59+00:00"
generated_at: "2026-05-16T12:39:00.445644+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Plum IV and American Critical Resources sign non-binding LOI for business combination

## Summary
- ACR targets up to 100,000 metric tons annual lithium carbonate from Hell's Kitchen project at Salton Sea, CA.
- Project expected to deliver 50 MW renewable baseload electricity; over $285M in private investment secured to date.
- Definitive Feasibility Study validated by Baker Hughes; Idaho National Laboratory identifies additional critical minerals.
- No definitive agreement yet; transaction subject to due diligence, board/shareholder approvals, and regulatory clearances.

## SEC filing metadata
- accession: 0001213900-25-123850
- form_type: 8-K
- ticker: PLMK
- cik: 0002030482
- company_name: Plum Acquisition Corp, IV
- filed_at: 2025-12-19T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2030482/000121390025123850/0001213900-25-123850-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2030482/000121390025123850/ea0270332-8k425_plum4.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-123850
- JSON: https://secwatch.observer/filing/0001213900-25-123850.json
- Plain text: https://secwatch.observer/filing/0001213900-25-123850.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.