---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-008397"
form_type: "8-K"
ticker: "PLMK"
cik: "0002030482"
company_name: "Plum Acquisition Corp, IV"
filed_at: "2026-01-28T23:59:59+00:00"
generated_at: "2026-05-16T07:08:54.227619+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "medium"
source: SEC EDGAR
---

# Plum IV and American Critical Resources announce LOI for business combination

## Summary
- Non-binding LOI for SPAC merger with ACR, subsidiary of Controlled Thermal Resources.
- ACR's Hell's Kitchen project in CA targets 50 MW geothermal power and ~100,000 tpa lithium.
- Presentation cites 12 years development, $285M invested, Stage 1 shovel-ready.
- No definitive agreement; completion subject to due diligence, board/regulatory approvals.
- ACR integrates geothermal power with direct lithium extraction for critical minerals.

## SEC filing metadata
- accession: 0001213900-26-008397
- form_type: 8-K
- ticker: PLMK
- cik: 0002030482
- company_name: Plum Acquisition Corp, IV
- filed_at: 2026-01-28T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: medium
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2030482/000121390026008397/0001213900-26-008397-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2030482/000121390026008397/ea0274337-8k425_plum4.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-008397
- JSON: https://secwatch.observer/filing/0001213900-26-008397.json
- Plain text: https://secwatch.observer/filing/0001213900-26-008397.txt

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