G.F.W. Energy XII, L.P. NPWR — NET POWER INC

Ownership history in G.F.W. Energy XII, L.P.  ·  10 quarters on record

AI Ownership Summary

G.F.W. Energy XII, L.P. reported NET POWER INC (NPWR) in 10 quarterly 13F filings from 2023 Q4 through 2025 Q3. Peak portfolio weight reached 98.97% in 2024 Q3. The latest visible filing shows NPWR at 89.04% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this NPWR ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was G.F.W. Energy XII, L.P.'s position in NET POWER INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2025 Q3

NPWR was reported at 89.04% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
98.97% in 2024 Q3

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2025 Q3

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

NPWR stock page G.F.W. Energy XII, L.P. fund profile G.F.W. Energy XII, L.P. full holdings
How G.F.W. Energy XII, L.P. held NPWR — position size vs. price
% of Fund (quarterly)    NPWR price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 8 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q3 UNCHANGED — — — 118,729 — 0% 89.04% $357.4M 2025-11-14 (Est.) $2.82
2025 Q2 UNCHANGED — — — 118,729 — 0% 2.25% $293K 2025-08-14 $2.49
2025 Q1 REDUCED 72.4% -6.1% ✅ 118,729 -311,113 -72.4% 89.46% $312.3M 2025-05-15 $1.62
2024 Q4 REDUCED 57.0% -75.2% ✅ 429,842 -570,158 -57.0% 98.53% $4.6M 2025-02-14 $7.74
2024 Q3 UNCHANGED — — — 1,000,000 — 0% 98.97% $7.0M 2024-11-14 $13.10
2024 Q2 UNCHANGED — — — 1,000,000 — 0% 18.94% $9.8M 2024-08-14 $8.21
2024 Q1 UNCHANGED — — — 1,000,000 — 0% 98.63% $11.4M 2024-05-15 $11.88
2023 Q4 UNCHANGED — — — 1,000,000 — 0% 5.47% $10.1M 2024-02-14 $8.11
2 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding NPWR

As of 2026 Q1 — sorted by position size

Share Andrew L. 3Y 7Y 7.11% Argentarii, LLC 0.41% HITE Hedge Asset Management LLC 3Y 7Y 0.24% Sourcerock Group LLC 3Y 0.09% CenterBook Partners LP 3Y 0.04% GSA CAPITAL PARTNERS LLP 3Y 7Y 0.02% SIR Capital Management, L.P. 3Y 7Y 0.02% Kapstone Financial Advisors LLC 3Y 0.01% OXFORD ASSET MANAGEMENT LLP 3Y 7Y 0.01% Defiance ETFs, LLC 0.01%

FAQ About G.F.W. Energy XII, L.P. and NPWR

These are the practical questions this page is built to answer before you even open the full history table.

How long has G.F.W. Energy XII, L.P. reported owning NPWR?

G.F.W. Energy XII, L.P. reported NPWR across 8 quarterly 13F filings, from 2023 Q4 through 2025 Q3.

What was the largest reported NPWR position in G.F.W. Energy XII, L.P.'s portfolio?

The largest reported portfolio weight for NPWR was 98.97% in 2024 Q3.

What is the latest reported NPWR position on this page?

The most recent filing on this page is 2025 Q3, when G.F.W. Energy XII, L.P. reported 118,729 shares, equal to 89.04% of portfolio, with an estimated market value of $357.4M.

What does the chart on this NPWR ownership page compare?

The chart compares G.F.W. Energy XII, L.P.'s quarterly NPWR portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did G.F.W. Energy XII, L.P. time their NPWR position?

Based on 13F filing dates vs. subsequent NPWR price moves, G.F.W. Energy XII, L.P. correctly timed 1 out of 3 reported position changes (33%). The annualised alpha on NPWR relative to SPY over the holding period was -60.0%.

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