Form4insider filings, from the source

Company · CIK 0001845437 · SIC 3620 — Electrical Industrial Apparatus · NYSE

Net Power Inc. · NPWR

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $939k · 2net −$939k
$10k$10k$100k$100k$1M$1MbuyssalesAug 28Sep 2Sep 7Sep 12Sep 18Sep 23Sep 28

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 8, 2026 SForm 4 →Sep 10, 6:01 pm EDT8 Rivers Capital, LLC +110% Owner250,000$1.88$469,595750,000−25.0%
Sep 8, 2026 SForm 4 →Sep 10, 6:00 pm EDTNPEH, LLC10% Owner250,000$1.88$469,595750,000−25.0%

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.