---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-124814"
form_type: "8-K"
ticker: "NPWR"
cik: "0001845437"
company_name: "NET Power Inc."
filed_at: "2026-11-10T13:00:36+00:00"
generated_at: "2026-11-10T13:05:26.641442+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# NET Power board amends Marc Horstman's option terms; 240,000 shares at $2.13 exercisable longer after exit

## Summary
- Board approved Nov 4, 2026 the Option Amendment the Compensation Committee adopted in October 2026, applying it to President and COO Marc Horstman's stock option.
- Horstman's option covers 240,000 Class A shares at $2.13, granted June 2, 2025, fully vested June 2, 2026 and expiring June 2, 2030; share count, strike and vesting unchanged.
- Under the amendment, an other-than-cause termination keeps the option vesting on schedule and exercisable until expiration; resignation exercise window rises to 90 days from 30.
- Termination for cause still forfeits the option whether or not vested; death and disability treatment unchanged. Amendment to be filed with the Form 10-Q for the quarter ended Sept 30, 2026.
- Applies to time-vesting options on the standard form under the NET Power Inc. 2023 Omnibus Incentive Plan, excluding holders who resigned before the committee adopted it.

## SEC filing metadata
- accession: 0001104659-26-124814
- form_type: 8-K
- ticker: NPWR
- cik: 0001845437
- company_name: NET Power Inc.
- filed_at: 2026-11-10T13:00:36+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1845437/000110465926124814/0001104659-26-124814-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1845437/000110465926124814/tm2629334d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-124814
- JSON: https://secwatch.observer/filing/0001104659-26-124814.json
- Plain text: https://secwatch.observer/filing/0001104659-26-124814.txt

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