NET Power Inc.
Ownership
Ownership Structure
Who owns NET Power Inc. (NPWR)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 52.3% of the shares are freely tradable; institutional investors hold 42.1%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Share Andrew L. | 11.04 | 9,767,500 | +0.0 | 06/30/2026 |
| HITE Hedge Asset Management MLP | 3.22 | 2,852,670 | +3.2 | 06/30/2026 |
| Adage Capital Partners Gp LLC | 3.21 | 2,840,000 | +84.4 | 06/30/2026 |
| BlackRock Inc | 2.42 | 2,142,916 | +7.4 | 03/31/2026 |
| Vanguard Capital Management, LLC | 1.86 | 1,643,795 | +0.0 | 03/31/2026 |
| Sourcerock Group LLC | 1.58 | 1,400,110 | -6.9 | 06/30/2026 |
| Cohen & Steers Inc | 1.00 | 888,954 | -0.4 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Defiance AI & Power Infrastructure ETF | 1.94 | 1,713,512 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 1.51 | 1,336,582 | +0.0 | 08/31/2026 |
| iShares Russell 2000 ETF | 1.18 | 1,043,285 | -0.6 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| 8 Rivers Capital, LLC | 10% Owner | 750,000 | 1,200,000 $ | Sep 9, 2026 | indirect |
| Npeh, Llc | 10% Owner | 750,000 | 1,200,000 $ | Sep 9, 2026 | direct |
| Peterson Carol R. | Director | 176,151 | 281,842 $ | Jun 3, 2026 | direct |
| Veltmann Alejandra | Director | 176,151 | 281,842 $ | Jun 3, 2026 | direct |
| Kelliher Joseph T | Director | 176,151 | 281,842 $ | Jun 3, 2026 | direct |
| Alexander Ralph | Director | 176,151 | 281,842 $ | Jun 3, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 9, 2026 | 8 Rivers Capital, LLC | 10% Owner | Sell | 150,000 | 1.84 | 276,075 |
| Sep 9, 2026 | Npeh, Llc | 10% Owner | Sell | 150,000 | 1.84 | 276,075 |
| Sep 8, 2026 | 8 Rivers Capital, LLC | 10% Owner | Sell | 100,000 | 1.94 | 193,520 |
| Sep 8, 2026 | Npeh, Llc | 10% Owner | Sell | 100,000 | 1.94 | 193,520 |
| Aug 26, 2026 | Npeh, Llc | 10% Owner | Sell | 41,350 | 1.91 | 79,078 |
| Aug 26, 2026 | 8 Rivers Capital, LLC | 10% Owner | Sell | 41,350 | 1.91 | 79,078 |
| Aug 25, 2026 | Npeh, Llc | 10% Owner | Sell | 201,550 | 1.91 | 384,255 |
| Aug 25, 2026 | 8 Rivers Capital, LLC | 10% Owner | Sell | 201,550 | 1.91 | 384,255 |
| Aug 14, 2026 | Npeh, Llc | 10% Owner | Sell | 507,100 | 1.95 | 990,518 |
| Aug 14, 2026 | 8 Rivers Capital, LLC | 10% Owner | Sell | 507,100 | 1.95 | 990,518 |
| Aug 13, 2026 | Npeh, Llc | 10% Owner | Sell | 200,000 | 1.62 | 323,840 |
| Aug 13, 2026 | 8 Rivers Capital, LLC | 10% Owner | Sell | 200,000 | 1.62 | 323,840 |
| Aug 12, 2026 | Npeh, Llc | 10% Owner | Sell | 50,000 | 1.63 | 81,575 |
| Aug 12, 2026 | 8 Rivers Capital, LLC | 10% Owner | Sell | 50,000 | 1.63 | 81,575 |
| Jun 3, 2026 | Peterson Carol R. | Director | Other | 71,770 | 0.00 | – |
| Jun 3, 2026 | Veltmann Alejandra | Director | Other | 71,770 | 0.00 | – |
| Jun 3, 2026 | Kelliher Joseph T | Director | Other | 71,770 | 0.00 | – |
| Jun 3, 2026 | Alexander Ralph | Director | Other | 71,770 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 25, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.