NET Power Inc. (NPWR) has 12 known insider and institutional holders on record. The largest holder is 8 Rivers Capital, LLC with 3,400,000 shares. Other notable holders include NPEH, LLC and SK INC..
Over the last 12 months, insiders have made 103 transactions in NPWR stock — 9 buys (valued at RSU Award) and 90 sells (valued at $39.75M). Insider selling has exceeded buying during this period.
NPWR Insider Ownership
Top Holder
8 Rivers Capital, LLC
3,400,000 shares
Buys (12 mo)
9
$0.00 value
Sells (12 mo)
90
$39.75M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
8 Rivers Capital, Llc |
10 Percent Owner |
3,400,000 |
2026-03-10 |
|
| 2 |
Npeh, Llc |
10 Percent Owner |
3,400,000 |
2026-03-10 |
|
| 3 |
Sk Inc. |
10 Percent Owner |
2,500,000 |
2024-05-28 |
|
| 4 |
Beauchamp Cynda |
10 Percent Owner |
1,847,130 |
2025-11-04 |
|
| 5 |
Allen Brian F. |
COO and President |
170,009 |
2025-04-04 |
|
| 6 |
Patel Akash S. |
Chief Financial Officer |
151,208 |
2025-04-04 |
|
| 7 |
Veltmann Alejandra |
Director |
104,381 |
2025-06-05 |
|
| 8 |
Peterson Carol R. |
Director |
104,381 |
2025-06-05 |
|
| 9 |
Kelliher Joseph T |
Director |
104,381 |
2025-06-05 |
|
| 10 |
Alexander Ralph |
Director |
104,381 |
2025-06-05 |
|
| 11 |
Rosser Kelly |
Chief Accounting Officer |
71,567 |
2025-04-07 |
|
| 12 |
Horstman Marc |
Chief Operating Officer |
1,845 |
2025-06-04 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-06 |
Npeh, Llc |
10 Percent Owner |
Conversion (Buy) |
3,000,000 |
- |
- |
| 2026-03-06 |
8 Rivers Capital, Llc |
10 Percent Owner |
Conversion (Buy) |
3,000,000 |
- |
- |
| 2026-03-03 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
100,000 |
$2.04 |
$204.25K |
| 2026-03-03 |
8 Rivers Capital, Llc |
10 Percent Owner |
Informative Sell |
100,000 |
$2.04 |
$204.25K |
| 2026-03-02 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
79,858 |
$2.05 |
$163.77K |
| 2026-02-27 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
4,744 |
$2.00 |
$9.49K |
| 2026-02-26 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
1,881 |
$2.00 |
$3.76K |
| 2026-03-02 |
8 Rivers Capital, Llc |
10 Percent Owner |
Informative Sell |
79,858 |
$2.05 |
$163.77K |
| 2026-02-27 |
8 Rivers Capital, Llc |
10 Percent Owner |
Informative Sell |
4,744 |
$2.00 |
$9.49K |
| 2026-02-26 |
8 Rivers Capital, Llc |
10 Percent Owner |
Informative Sell |
1,881 |
$2.00 |
$3.76K |
| 2026-02-20 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
63,517 |
$2.03 |
$129.23K |
| 2026-02-19 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
125,000 |
$2.14 |
$267.64K |
| 2026-02-20 |
8 Rivers Capital, Llc |
10 Percent Owner |
Informative Sell |
63,517 |
$2.03 |
$129.23K |
| 2026-02-19 |
8 Rivers Capital, Llc |
10 Percent Owner |
Informative Sell |
125,000 |
$2.14 |
$267.64K |
| 2026-02-18 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
75,000 |
$2.07 |
$155.19K |
| 2026-02-13 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
100,000 |
$2.14 |
$214.14K |
| 2026-02-18 |
8 Rivers Capital, Llc |
10 Percent Owner |
Informative Sell |
75,000 |
$2.07 |
$155.19K |
| 2026-02-13 |
8 Rivers Capital, Llc |
10 Percent Owner |
Informative Sell |
100,000 |
$2.14 |
$214.14K |
| 2026-02-12 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
150,000 |
$2.03 |
$304.61K |
| 2026-02-11 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
60,000 |
$2.02 |
$121.35K |
| 2026-02-10 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
40,000 |
$2.08 |
$83.21K |
| 2026-02-12 |
8 Rivers Capital, Llc |
10 Percent Owner |
Informative Sell |
150,000 |
$2.03 |
$304.61K |
| 2026-02-11 |
8 Rivers Capital, Llc |
10 Percent Owner |
Informative Sell |
60,000 |
$2.02 |
$121.35K |
| 2026-02-10 |
8 Rivers Capital, Llc |
10 Percent Owner |
Informative Sell |
40,000 |
$2.08 |
$83.21K |
| 2026-01-29 |
Npeh, Llc |
10 Percent Owner |
Informative Sell |
54,780 |
$2.35 |
$128.65K |
