---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-26-105485"
form_type: "8-K"
ticker: "PLMK"
cik: "0002030482"
company_name: "Plum Acquisition Corp, IV"
filed_at: "2026-10-01T13:16:28+00:00"
generated_at: "2026-10-12T14:18:54.396800+00:00"
event_type: "debt"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Plum IV and CTR announce agreements to convert ~$205M convertible debt to equity ahead of proposed business combination

## Summary
- CTR's outstanding convertible notes expected to total about $245M at closing; ~$205M expected to convert to equity and ~$40M into a new planned PIPE.
- Combined company expected to operate as Controlled Thermal Resources and list on Nasdaq under ticker CTRH; deal expected to close in Q4 2026.
- CTR plans Stage 1 Power as a 50 MW geothermal facility with commercial operation in 2028, plus Stage 1 Lithium targeting 25,000 metric tons annually in 2030.
- CTR plans ~650 MW of renewable baseload geothermal generation and has invested ~$310M in Hell's Kitchen development to date.
- Plum IV CEO Kanishka Roy says the steps simplify CTR's balance sheet ahead of proposed listing; CTR CEO Rod Colwell cites greater flexibility for Stage 1 project financing.

## SEC filing metadata
- accession: 0001213900-26-105485
- form_type: 8-K
- ticker: PLMK
- cik: 0002030482
- company_name: Plum Acquisition Corp, IV
- filed_at: 2026-10-01T13:16:28+00:00
- event_type: debt
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2030482/000121390026105485/0001213900-26-105485-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2030482/000121390026105485/ea0307325-8k425_plum4.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-26-105485
- JSON: https://secwatch.observer/filing/0001213900-26-105485.json
- Plain text: https://secwatch.observer/filing/0001213900-26-105485.txt

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