Net Power Inc.
NPWR- Exchange
- NYSE
- Industry
- Electrical Industrial Apparatus
- SEC CIK
- 0001845437
In the last 90 days, Net Power Inc. insiders filed 0 open-market purchases and 7 sales; 120 institutions reported holding it in 13F filings for Q2 2026, worth $64.1M in total; no superinvestor holds it.
Other share classesNPWR.WT
Q4 2025 vs. Q3 2025
How the institutions holding Net Power Inc. changed between Q3 2025 and Q4 2025.
All holders in Q4 2025All holders in Q3 2025
| Measure | Q3 2025 | Of which not filed for Q4 2025 | Q4 2025 | Change |
|---|---|---|---|---|
| Holders | 100 | 4 | 114 | +18 |
| Shares | 32.5M | 151.9K | 33.4M | +1.04M (+3.2%) |
| Value | $97.7M | $457.3K | $76.1M | −$21.2M (−21.8%) |
4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.
New holders (28)
Institutions that held Net Power Inc. at the end of Q4 2025 but not at the end of Q3 2025.
Sold out (10)
Institutions that held Net Power Inc. at the end of Q3 2025 and filed for Q4 2025 without it.
| Institution | Shares, Q3 2025 | Value, Q3 2025 |
|---|---|---|
| Walleye Capital LLC | 284,932 | $857.6K |
| Ardsley Advisory Partners LP | 107,817 | $324.5K |
| HRT Financial LP | 105,663 | $318.0K |
| Squarepoint Ops LLC | 98,700 | $297.1K |
| Citadel Advisors LLC | 73,044 | $219.9K |
| Simplex Trading, LLC | 47,571 | $143.0K |
| SG Americas Securities, LLC | 34,911 | $105.0K |
| Sanctuary Advisors, LLC | 10,735 | $32.3K |
| Rockefeller Capital Management L.P. | 110 | $331 |
| Versant Capital Management, Inc | 103 | $310 |
Not filed for Q4 2025 yet (4)
Institutions that held Net Power Inc. at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q3 2025 | Value, Q3 2025 |
|---|---|---|
| G.F.W. Energy XII, L.P. | 118,729 | $357.4K |
| Stonegate Investment Group, LLC | 30,000 | $90.3K |
| West Oak Capital, LLC | 2,500 | $7.50K |
| Promus Capital, LLC | 718 | $2.16K |