Who owns NET Power Inc, from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
8 RIVERS CAPITAL, LLC: 17.9% · 18,972,780 shares — NPEH, LLC: 17.9% · 18,972,780 shares — DAMIAN BEAUCHAMP: 17.9% · 18,972,780 shares
8 RIVERS CAPITAL, LLC: 25.6% · 26,729,880 shares — NPEH, LLC: 25.6% · 26,729,880 shares — SK INC.: 0.0% · 0 shares
Every institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of NET Power Inc they hold. Together these 150 managers report 47.78% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| Share Andrew L. | $16.3M | 9,767,500 | 8.43% | 11.05% | June 30, 2026 |
| HITE Hedge Asset Management LLC | $4.76M | 2,852,670 | 0.26% | 3.23% | June 30, 2026 |
148 more institutional holders behind a free account
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Sign up freeFunds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 93 funds hold 8.56% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND | $2.23M | 0.00% | 1.51% | June 30, 2026 |
| iShares Russell 2000 ETF | $1.41M | 0.00% | 1.02% | March 31, 2026 |
91 more funds behind a free account
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