8 Rivers Capital, LLC insider trades
8 Rivers Capital, LLC has filed 18 Form 4s with the SEC that we hold, all for Net Power Inc. (NPWR), as 10% owner. Across all of them we count 0 purchases worth $0 and 44 sales worth $12.3M reported on Form 4. In the last 12 months: 0 purchases ($0) and 35 sales ($9.0M). The largest single trade was a sale of 160,521 shares of Net Power Inc. worth $1.3M, dated 2024-09-05. Of 4 sales filed since we began reading the 10b5-1 checkbox, 0 (0%) were marked as made under a 10b5-1 trading plan. The first filing on our record is dated 2024-09-06 and the latest 2026-09-10.
Net Power Inc. (NPWR)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2024-09-04 | S, sale reported on Form 4 | 83,325 | $674.9K | 2024-09-06 |
| 2024-09-05 | S, sale reported on Form 4 | 160,521 | $1.3M | 2024-09-06 |
| 2024-09-06 | S, sale reported on Form 4 | 66,825 | $526.6K | 2024-09-06 |
| 2024-09-09 | S, sale reported on Form 4 | 60,022 | $456.2K | 2024-09-11 |
| 2024-09-10 | S, sale reported on Form 4 | 300 | $2.2K | 2024-09-11 |
| 2024-09-11 | S, sale reported on Form 4 | 21,155 | $154.0K | 2024-09-11 |
| 2024-09-12 | S, sale reported on Form 4 | 2,315 | $16.8K | 2024-09-16 |
| 2024-09-13 | S, sale reported on Form 4 | 1,340 | $9.7K | 2024-09-16 |
| 2024-09-16 | S, sale reported on Form 4 | 36,752 | $259.1K | 2024-09-16 |
| 2025-10-31 | S, sale reported on Form 4 | 18,116 | $73.4K | 2025-11-04 |
| 2025-11-03 | S, sale reported on Form 4 | 8,477 | $33.9K | 2025-11-04 |
| 2025-11-17 | S, sale reported on Form 4 | 338,653 | $951.6K | 2025-11-19 |
| 2025-11-19 | S, sale reported on Form 4 | 250,000 | $642.5K | 2025-11-19 |
| 2025-12-04 | S, sale reported on Form 4 | 65,000 | $191.1K | 2025-12-08 |
| 2025-12-05 | S, sale reported on Form 4 | 105,000 | $305.6K | 2025-12-08 |
| 2025-12-08 | S, sale reported on Form 4 | 140,000 | $393.4K | 2025-12-08 |
| 2025-12-19 | S, sale reported on Form 4 | 100,000 | $234.0K | 2025-12-23 |
| 2025-12-22 | S, sale reported on Form 4 | 100,000 | $226.0K | 2025-12-23 |
| 2025-12-23 | S, sale reported on Form 4 | 130,000 | $282.1K | 2025-12-23 |
| 2026-01-14 | S, sale reported on Form 4 | 135,000 | $369.9K | 2026-01-16 |
| 2026-01-15 | S, sale reported on Form 4 | 135,000 | $346.9K | 2026-01-16 |
| 2026-01-16 | S, sale reported on Form 4 | 230,000 | $604.9K | 2026-01-16 |
| 2026-01-29 | S, sale reported on Form 4 | 54,780 | $128.7K | 2026-02-02 |
| 2026-02-19 | S, sale reported on Form 4 | 125,000 | $267.5K | 2026-02-23 |
| 2026-02-20 | S, sale reported on Form 4 | 63,517 | $128.9K | 2026-02-23 |
| 2026-07-21 | S, sale reported on Form 4 | 80,000 | $122.4K | 2026-07-23 |
| 2026-07-22 | S, sale reported on Form 4 | 90,000 | $137.3K | 2026-07-23 |
| 2026-07-23 | S, sale reported on Form 4 | 39,142 | $59.0K | 2026-07-23 |
| 2026-07-28 | S, sale reported on Form 4 | 55,858 | $82.2K | 2026-07-30 |
| 2026-07-29 | S, sale reported on Form 4 | 45,000 | $63.3K | 2026-07-30 |
| 2026-07-30 | S, sale reported on Form 4 | 155,000 | $221.4K | 2026-07-30 |
| 2026-08-04 | S, sale reported on Form 4 | 120,000 | $184.7K | 2026-08-06 |
| 2026-08-05 | S, sale reported on Form 4 | 140,000 | $211.5K | 2026-08-06 |
| 2026-08-06 | S, sale reported on Form 4 | 89,255 | $134.4K | 2026-08-06 |
| 2026-08-07 | S, sale reported on Form 4 | 60,345 | $92.1K | 2026-08-11 |
| 2026-08-10 | S, sale reported on Form 4 | 55,400 | $86.1K | 2026-08-11 |
| 2026-08-11 | S, sale reported on Form 4 | 35,000 | $56.0K | 2026-08-11 |
| 2026-08-12 | S, sale reported on Form 4 | 50,000 | $81.6K | 2026-08-14 |
| 2026-08-13 | S, sale reported on Form 4 | 200,000 | $323.8K | 2026-08-14 |
| 2026-08-14 | S, sale reported on Form 4 | 507,100 | $990.5K | 2026-08-14 |
| 2026-08-25 | S, sale reported on Form 4 | 201,550 | $384.3K | 2026-08-27 |
| 2026-08-26 | S, sale reported on Form 4 | 41,350 | $79.1K | 2026-08-27 |
| 2026-09-08 | S, sale reported on Form 4 | 100,000 | $193.5K | 2026-09-10 |
| 2026-09-09 | S, sale reported on Form 4 | 150,000 | $276.1K | 2026-09-10 |
Counted from the Form 4 filings this reporting owner (SEC CIK 1981100) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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