StockCIK 1845437

Net Power Inc. (NPWR): Insider Trades and Fund Holdings

In the past 12 months, Net Power Inc. insiders reported 0 open-market purchases worth $0 and 14 sales worth $4.66M; 0 of the sales were reported as made under a 10b5-1 trading plan.

0Insider buys, 12 months

$0Bought by insiders, 12 months

$4.66MSold by insiders, 12 months

1Tracked funds holding

Recent insider trades

Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Sep 10, 2026.

Recent NPWR insider trades
Filed	Traded	Insider	Role	Type	Shares	Price ($)	Value	Holding	Filing
Sep 10	Sep 9	Npeh, LLC10% owner	10% owner	▼ SELL	150,000	1.84	$276K	−17%	Form 4 ↗
Sep 10	Sep 9	8 Rivers Capital, LLC10% owner	10% owner (ind.)	▼ SELL	150,000	1.84	$276K	−17%	Form 4 ↗
Sep 10	Sep 8	Npeh, LLC10% owner	10% owner	▼ SELL	100,000	1.94	$194K	−10%	Form 4 ↗
Sep 10	Sep 8	8 Rivers Capital, LLC10% owner	10% owner (ind.)	▼ SELL	100,000	1.94	$194K	−10%	Form 4 ↗
Aug 27	Aug 25	8 Rivers Capital, LLC10% owner	10% owner (ind.)	▼ SELL	201,550	1.91	$384K	−16%	Form 4 ↗
Aug 27	Aug 25	Npeh, LLC10% owner	10% owner	▼ SELL	201,550	1.91	$384K	−16%	Form 4 ↗
Aug 27	Aug 26	8 Rivers Capital, LLC10% owner	10% owner (ind.)	▼ SELL	41,350	1.91	$79K	−4.0%	Form 4 ↗
Aug 27	Aug 26	Npeh, LLC10% owner	10% owner	▼ SELL	41,350	1.91	$79K	−4.0%	Form 4 ↗
Aug 14	Aug 14	8 Rivers Capital, LLC10% owner	10% owner (ind.)	▼ SELL	507,100	1.95	$991K	−29%	Form 4 ↗
Aug 14	Aug 14	Npeh, LLC10% owner	10% owner	▼ SELL	507,100	1.95	$991K	−29%	Form 4 ↗

Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings

All 14 NPWR insider trades →

Insiders who traded in the past year

Insider	Role	Buys	Bought	Sells	Sold	Latest
Npeh, LLC	10% owner	0	$0	7	$2.33M	Sep 10, 2026
8 Rivers Capital, LLC	10% owner	0	$0	7	$2.33M	Sep 10, 2026

Tracked funds that report NPWR

From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.

Fund	Quarter	Shares	Value	% of portfolio	Change
Renaissance Technologies	Q2 2026	354,206	$592K	0.00%	▼ −49.7%

Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings

Reading these numbers

Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →