Transaction · 0001104659-26-106788

8 Rivers Capital, LLC

8 Rivers Capital, LLC, 10%, reported an open-market or private sale at Net Power Inc. involving 150000.000000 shares for an estimated $276075.00. Reported holdings after the transaction were 750000.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code S10%
NPWRNet Power Inc.
Trade date
Sep 09, 2026
Filing date
Sep 10, 2026
View on SEC Insider profile
Estimated value-$276kShares × reported price
Shares traded150k$1.84 per share
Holdings after750kIndirect · By: NPEH, LLC
% of reported position traded16.67%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 900,000 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

NPWR price since this filing

Daily closing prices, with the filing date and available return windows
NPWR · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago -13.7%1w ago -2.7%1d ago +4.4%
Returns since7d +0.0%30d -32.4%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001104659-26-106788
Class A Common Stock
Transaction date
Sep 09, 2026
Filed Sep 10, 2026, 10:01 PM · 1d delay
Shares
150,000 sh
$1.84 per share
Estimated value
-$276k
Computed from shares × price
Holdings after
750,000 sh
Indirect · By: NPEH, LLC

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Selling Repeat Seller
Filing-only score

+4 points

Compact filing score computed from stored Form 4 facts. Version v1.

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

How this score is calculated
  • timely_filing+4 points

    reporting_delay_days = 1

    Filing reported within two business days of the transaction.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector No10% YesOther No
Footnotes & amended
  1. F1

    The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $1.87 to $2.00. NPEH, LLC ("NPEH"), will provide up…

  2. F2

    The price reported reflects the weighted average sales price. The shares of Class A Common Stock were sold in multiple trades at prices ranging from $1.77 to $1.885. NPEH will provide upon request to…

  3. F3

    As manager and holder of approximately 90.9% of the outstanding equity in NPEH, 8 Rivers Capital, LLC ("8 Rivers") may be deemed to be a beneficial owner of the securities directly owned by NPEH. 8 Ri…

  4. F4

    Damian R. Beauchamp ("Mr. Beauchamp") independently indirectly owns approximately 63.70% of 8 Rivers, and Mr. Beauchamp directly owns approximately 3.83% of 8 Rivers. Accordingly, Mr. Beauchamp may be…

Original filing · 0001104659-26-106788
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