NPWR NET Power Inc.
NET Power Inc. (NPWR) Institutional Ownership
What the institutions did with NPWR last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Argentarii, LLC | 746.8K | 54.9% |
| MRA Advisory Group | 214.9K | 15.8% |
| WOLVERINE ASSET MANAGEMENT LLC | 171.7K | 12.6% |
| DIMENSIONAL FUND ADVISORS LP | 109.5K | 8.0% |
| Clear Harbor Asset Management, LLC | 27.5K | 2.0% |
| INTEGRITY ALLIANCE, LLC. | 17.4K | 1.3% |
| Legacy Advisors, LLC | 16.4K | 1.2% |
| SIMPLEX TRADING, LLC | 11.4K | 0.8% |
| Cambridge Investment Research Advisors, Inc. | 11.3K | 0.8% |
| Dynamic Advisor Solutions LLC | 10.4K | 0.8% |
| TRUIST FINANCIAL CORP | 10.0K | 0.7% |
| LANARK FINANCIAL, INC. | 6.3K | 0.5% |
| CITIGROUP INC | 2.1K | 0.2% |
| EverSource Wealth Advisors, LLC | 1.0K | 0.1% |
| Essential Partners LLC | 901 | 0.1% |
| Sterling Capital Management LLC | 823 | 0.1% |
| Fortitude Family Office, LLC | 523 | 0.0% |
| GAMMA Investing LLC | 446 | 0.0% |
| SBI Securities Co., Ltd. | 405 | 0.0% |
| NISA INVESTMENT ADVISORS, LLC | 229 | 0.0% |
| Farther Finance Advisors, LLC | 116 | 0.0% |
| IFP Advisors, Inc | 85 | 0.0% |
| Caitong International Asset Management Co., Ltd | 34 | 0.0% |
| SJS Investment Consulting Inc. | 8 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| MRA Advisory Group | New | 0 | 214.9K | +214.9K |
| SIMPLEX TRADING, LLC | Reduced | 77.6K | 11.4K | -66.2K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 163.4K | 109.5K | -54.0K |
| Clear Harbor Asset Management, LLC | New | 0 | 27.5K | +27.5K |
| CITIGROUP INC | Reduced | 19.7K | 2.1K | -17.6K |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | Sold Out | 13.5K | 0 | -13.5K |
| Creative Planning | Sold Out | 12.2K | 0 | -12.2K |
| Cambridge Investment Research Advisors, Inc. | Reduced | 22.7K | 11.3K | -11.3K |
| WOLVERINE ASSET MANAGEMENT LLC | Increased | 168.9K | 171.7K | +2.8K |
| Blue Trust, Inc. | Sold Out | 1.4K | 0 | -1.4K |
| EverSource Wealth Advisors, LLC | Reduced | 1.7K | 1.0K | -658 |
| GAMMA Investing LLC | New | 0 | 446 | +446 |
| SBI Securities Co., Ltd. | Increased | 5 | 405 | +400 |
| Essential Partners LLC | Increased | 711 | 901 | +190 |
| Farther Finance Advisors, LLC | Reduced | 275 | 116 | -159 |
| Sterling Capital Management LLC | Increased | 733 | 823 | +90 |
| True Wealth Design, LLC | Sold Out | 50 | 0 | -50 |
| SJS Investment Consulting Inc. | Reduced | 57 | 8 | -49 |
| Caitong International Asset Management Co., Ltd | Increased | 10 | 34 | +24 |
| Fortitude Family Office, LLC | Reduced | 545 | 523 | -22 |
| IFP Advisors, Inc | Reduced | 106 | 85 | -21 |
| Legacy Advisors, LLC | Reduced | 16.4K | 16.4K | -20 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.