---
schema_version: "secwatch.filing_event.v1"
accession: "0001845437-26-000002"
form_type: "8-K"
ticker: "NPWR"
cik: "0001845437"
company_name: "NET Power Inc."
filed_at: "2026-01-05T23:59:59+00:00"
generated_at: "2026-05-16T11:42:52.216278+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Net Power withdraws MISO interconnection request on higher upgrade costs

## Summary
- On Dec 29, 2025, notified MISO of intent to withdraw interconnection request due to significantly higher anticipated network upgrade costs.
- Company retains its site lease in northern MISO and is evaluating alternative development options for clean firm power generation.
- No significant costs capitalized for the MISO Interconnection Request; withdrawal not expected to materially impact financial condition or results.
- Management assessing alternatives to develop clean firm power at the site despite the setback.

## SEC filing metadata
- accession: 0001845437-26-000002
- form_type: 8-K
- ticker: NPWR
- cik: 0001845437
- company_name: NET Power Inc.
- filed_at: 2026-01-05T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1845437/000184543726000002/0001845437-26-000002-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1845437/000184543726000002/netpower-8xkremisointercon.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001845437-26-000002
- JSON: https://secwatch.observer/filing/0001845437-26-000002.json
- Plain text: https://secwatch.observer/filing/0001845437-26-000002.txt

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