NPWR
NET Power Inc. · Manufacturing · Market cap $91.1M
Insiders sold $7.6M net in the last 90 days ·2 sellers, 0 buyers· latest Form 4 filed Sep 10, 2026
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$38.2M
reported sales (SEC code S)
Unique Insiders
3
in the rolling window
Latest filing
Sep 10, 2026
8 Rivers Capital, LLC
NET Power Inc. (NPWR) has 61 SEC Form 4 filings (139 transaction rows) in the rolling window, disclosed by 3 distinct insiders. Most recent filing: Sep 10, 2026.
Inside the rolling window, 3 insiders at NET Power Inc. reported no open-market purchases and 121 open-market sales totaling $38.2M. The most active filer is 10% Owner 8 Rivers Capital, LLC with 60 filings. Insiders have net sold $9.7M over the trailing 6 months. The most recent open-market filing is a sale of 100,000 shares by 10% Owner 8 Rivers Capital, LLC, dated Sep 8, 2026, worth $194K.
- Industry:Industrial - Machinery
- CEO:Daniel Joseph Rice
- Employees:54
- HQ:Durham, NC, US
- IPO:2021-08-06
| Source | |||||||
|---|---|---|---|---|---|---|---|
| 10% Owner | Sale | 100,000 | $194K | Sep 10 | -43.4% | SEC ↗ | |
| 10% Owner | Sale | 150,000 | $276K | Sep 10 | -43.4% | SEC ↗ | |
| 10% Owner | Sale | 100,000 | $194K | Sep 10 | -43.4% | SEC ↗ | |
| 10% Owner | Sale | 150,000 | $276K | Sep 10 | -43.4% | SEC ↗ | |
| 10% Owner | Sale | 201,550 | $384K | Aug 27 | -45.5% | SEC ↗ | |
| 10% Owner | Sale | 41,350 | $79K | Aug 27 | -45.5% | SEC ↗ | |
| 10% Owner | Sale | 201,550 | $384K | Aug 27 | -45.5% | SEC ↗ | |
| 10% Owner | Sale | 41,350 | $79K | Aug 27 | -45.5% | SEC ↗ | |
| 10% Owner | Sale | 50,000 | $82K | Aug 14 | -47.2% | SEC ↗ | |
| 10% Owner | Sale | 200,000 | $324K | Aug 14 | -47.2% | SEC ↗ | |
| 10% Owner | Sale | 507,100 | $991K | Aug 14 | — | SEC ↗ | |
| 10% Owner | Sale | 50,000 | $82K | Aug 14 | — | SEC ↗ | |
| 10% Owner | Sale | 200,000 | $324K | Aug 14 | — | SEC ↗ | |
| 10% Owner | Sale | 507,100 | $991K | Aug 14 | — | SEC ↗ | |
| 10% Owner | Sale | 60,345 | $92K | Aug 11 | — | SEC ↗ | |
| 10% Owner | Sale | 55,400 | $86K | Aug 11 | — | SEC ↗ | |
| 10% Owner | Sale | 35,000 | $56K | Aug 11 | — | SEC ↗ | |
| 10% Owner | Sale | 60,345 | $92K | Aug 11 | — | SEC ↗ | |
| 10% Owner | Sale | 55,400 | $86K | Aug 11 | — | SEC ↗ | |
| 10% Owner | Sale | 35,000 | $56K | Aug 11 | — | SEC ↗ | |
| 10% Owner | Sale | 120,000 | $185K | Aug 6 | — | SEC ↗ | |
| 10% Owner | Sale | 140,000 | $211K | Aug 6 | — | SEC ↗ | |
| 10% Owner | Sale | 89,255 | $134K | Aug 6 | — | SEC ↗ | |
| 10% Owner | Sale | 120,000 | $185K | Aug 6 | — | SEC ↗ | |
| 10% Owner | Sale | 140,000 | $211K | Aug 6 | — | SEC ↗ |
Earnings: last 7 quarters
Frequently asked questions
How many SEC Form 4 insider filings does NPWR have?
NET Power Inc. (NPWR) has 61 SEC Form 4 filings (139 transaction rows) in the rolling 365-day window, disclosed by 3 distinct insiders. Most recent filing: Sep 10, 2026.
When was the most recent SEC Form 4 filing for NPWR?
The most recent Form 4 filing for NPWR on Tracefour is dated Sep 10, 2026.
Who is the most active insider at NPWR?
The most active SEC Form 4 filer at NPWR in the rolling window is 10% Owner 8 Rivers Capital, LLC, with 60 filings.
What is the net insider flow at NPWR over the last 6 months?
Over the trailing 180 days, insiders at NPWR have net sold $9.7M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at NPWR in the current window?
Inside the rolling window, insiders at NPWR bought $0 and sold $38.2M based on SEC Form 4 filings.
Can I get alerts for NPWR insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at NET Power Inc. (NPWR). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
NET Power Inc. is in the Manufacturing sector.