NPWR
NET Power Inc.Marquee-fund ownership over time
This quarter's activity
New positions opened
Positions exited
None.
Current holders
Sorted by tenure (longest first)| Fund | First disclosed | Held | Entry price | Latest close | Return on entry |
|---|---|---|---|---|---|
| Greenlight Capital | Q3 2023 | 11Q | $0.00 | $1.98 | — |
| Citadel Advisors re-entered | Q3 2024(8Q snapshot) | 7Q | $8.21 | $1.98 | -76% |
| Two Sigma Investments re-entered | Q3 2024(8Q snapshot) | 7Q | $0.00 | $1.98 | — |
| D.E. Shaw re-entered | Q3 2024(8Q snapshot) | 7Q | $8.21 | $1.98 | -76% |
| Millennium Management | Q3 2024(8Q snapshot) | 7Q | $8.21 | $1.98 | -76% |
| Point72 Asset Management re-entered | Q2 2025(8Q snapshot) | 4Q | $1.62 | $1.98 | +22% |
| AQR Capital Management | Q3 2025(8Q snapshot) | 3Q | $2.49 | $1.98 | -20% |
| Renaissance Technologies | Q1 2026(8Q snapshot) | 1Q | $2.06 | $1.98 | -4% |
“Return on entry” is the price-only move from the fund's first disclosure to today — it ignores any adds, trims, or dividends. A fund that built its position over multiple quarters has a true cost basis somewhere between entry price and latest close; this figure is the upper bound.
Past holders
Funds that exited at some point| Fund | Last entry | Exited | Entry → Exit | Return |
|---|---|---|---|---|
| Third Point | Q3 2023 | Q3 2025 | → $2.49 | -83% |
Insider activity
Form 4 — officers, directors, 10%+ ownersFiled within two business days of each transaction by anyone with material insider status at NET Power Inc.. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.
30d / 90d windows measured from May 14, 2026 — the most recent Form 4 on file — not from today.
- Form 40001104659-26-061387May 14, 2026
- Form 40001104659-26-061386May 14, 2026
- Form 4/Aamend0001104659-26-060274May 13, 2026
- Form 4/Aamend0001104659-26-060272May 13, 2026
- Form 40001104659-26-025970Mar 10, 2026
- Form 40001104659-26-025969Mar 10, 2026
- Form 40001104659-26-024242Mar 5, 2026
- Form 40001104659-26-024241Mar 5, 2026
- Form 40001104659-26-022378Mar 2, 2026
- Form 40001104659-26-022377Mar 2, 2026
- Form 40001104659-26-018703Feb 23, 2026
- Form 40001104659-26-018702Feb 23, 2026
- Form 40001104659-26-017183Feb 18, 2026
- Form 40001104659-26-017182Feb 18, 2026
- Form 40001104659-26-014480Feb 12, 2026
Fundamentals
XBRL · NET Power Inc.Annual figures sourced directly from NET Power Inc.'s 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.
Recent SEC filings
10-K · 10-Q · 8-K · 13D/G · proxyThe most recent material filings for NET Power Inc. — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.
- 8-KMaterial eventJun 5, 2026
- 10-QQuarterly reportMay 11, 2026
- 8-KMaterial eventMay 11, 2026
- DEF 14AProxy statementApr 23, 2026
- 8-KMaterial eventApr 13, 2026
- 10-KAnnual reportMar 9, 2026
- 8-KMaterial eventMar 9, 2026
- 8-KMaterial eventJan 5, 2026
- 10-QQuarterly reportNov 13, 2025
- 8-KMaterial eventNov 13, 2025
- 10-QQuarterly reportAug 11, 2025
- 8-KMaterial eventAug 11, 2025
- 8-KMaterial eventJul 15, 2025
- 8-KMaterial eventJun 20, 2025
- 8-KMaterial eventJun 6, 2025
Trade history
Every open→close lifecycle across tracked funds| Fund | Open date | Close date | Open price | Close price / current | Return |
|---|---|---|---|---|---|
| Citadel Advisors | Q2 2026 | open | $2.13 | $1.98 | -7% |
| Point72 Asset Management | Q1 2026 | open | $2.12 | $1.98 | -7% |
| Renaissance Technologies | Q1 2026 | open | $2.06 | $1.98 | -4% |
| Citadel Advisors | Q4 2025 | Q1 2026 | $2.82 | $2.12 | -25% |
| D.E. Shaw | Q3 2025 | open | $2.49 | $1.98 | -20% |
| AQR Capital Management | Q3 2025 | open | $2.49 | $1.98 | -20% |
| Point72 Asset Management | Q2 2025 | Q4 2025 | $1.62 | $2.82 | +74% |
| Two Sigma Investments | Q1 2025 | open | $7.74 | $1.98 | -74% |
| Citadel Advisors | Q3 2024 | Q3 2025 | $8.21 | $2.49 | -70% |
| Two Sigma Investments | Q3 2024 | Q1 2025 | $0.00 | — | +0% |
| D.E. Shaw | Q3 2024 | Q2 2025 | $8.21 | $1.62 | -80% |
| D.E. Shaw | Q3 2024 | open | $0.00 | — | +0% |
| Millennium Management | Q3 2024 | open | $8.21 | $1.98 | -76% |
| Third Point | Q3 2023 | Q3 2025 | $14 | $2.49 | -83% |
| Greenlight Capital | Q3 2023 | open | $0.00 | — | +0% |
- Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
- Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
- “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
- Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
- Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.