Comparable stake leader
SK INC.
SEC ownership of Net Power Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001845437.
Disclosed value leader
SK INC.
Comparable rows
2/50
Latest evidence
08 Sep 2026
- Public ticker
- NPWR, NPWR-WT on NYSE
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
SK INC.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
2 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
SK INC.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
08 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001845437
- Issuer location
- Houston, TX
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Net Power Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
SK INC.
Disclosed value leader
SK INC.
Comparable rows
2/50
Latest evidence
08 Sep 2026
13D/G
3/4/5
13F
Lead comparable stake: 26%
48 rows are not safely comparable across share classes.
13D/G row: SK INC.
Showing 1-8 of 50 holder rows.
Quick read
SK INC. leads the comparable SEC ownership view at 26%.
2 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens SK INC.'s linked filing trail.
Comparable ownership
Top 2
SK INC.
26%
8 Rivers Capital, LLC
18%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| SK INC. |
13D/G
8 RIVERS CAPITAL, LLC
|
26%
Reported 13D/G
· 30 Jul 2025
|
$88,475,903
26,729,880 shares
|
$0 | 30 Jul 2025 |
| 8 Rivers Capital, LLC |
13D/G
3/4/5
10%+ Owner
|
18%
Reported 13D/G
· 13 Aug 2026
|
$31,684,543
18,972,780 shares
|
-$2,875,907 | 13 Aug 2026 |
| CONSTELLATION ENERGY GENERATION LLC |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$7,559,050
500,000 shares
|
— | 08 Jun 2023 |
| Damian R. Beauchamp |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
$1,380,375
45,209,760 shares
mixed-class rows
|
-$4,839,990 | 08 Sep 2026 |
| NPEH, LLC |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
$1,380,375
18,479,880 shares
mixed-class rows
|
-$19,363,366 | 08 Sep 2026 |
| Daniel J. Rice IV |
3/4/5
Chief Executive Officer, Director, 10%+ Owner
|
—
mixed-class rows
|
$38,583
25,972,500 shares
mixed-class rows
|
— | 08 Jun 2023 |
| OCCIDENTAL PETROLEUM CORP /DE/ |
3/4/5
Director, 10%+ Owner
|
—
mixed-class rows
|
—
89,553,242 shares
mixed-class rows
|
— | 08 Jun 2023 |
| Andrew L. Share |
13F
Individual
|
—
denominator unverified
|
$16,311,725
9,767,500 shares
|
— | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$44,976,863.
Buys
$0
Insiders: 0
Sells
$44,976,863
Insiders: 4
Net
-$44,976,863
Shares: -18,292,916
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 18,292,916
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 6,405,000 | $0 | $10,970,635 | -$10,970,635 |
| 3-6 | 0 | 1,545,000 | $0 | $3,549,334 | -$3,549,334 |
| 6-9 | 0 | 2,300,000 | $0 | $4,970,435 | -$4,970,435 |
| 9-12 | 0 | 8,042,916 | $0 | $25,486,458 | -$25,486,458 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 30 reporting-owner rows connected to Net Power Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
30
Largest Forms 3/4/5 holder
Kyle Derham
Net 12M change
-$43,640,141
Latest report
08 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Kyle Derham | Director | $13,217,341 | Mixed | 16 Aug 2023 | ||
| Akash S. Patel | Chief Financial Officer | $10,073,392 | Mixed | 02 Apr 2025 | ||
| CONSTELLATION ENERGY GENERATION LLC | 10%+ Owner | $7,559,050 | Mixed | 08 Jun 2023 | ||
| Brock Forrest | Chief Technology Officer | $4,705,556 | Mixed | 08 Jun 2023 | ||
| James Mahon | General Counsel and Secretary | $4,674,899 | Mixed | 12 Sep 2023 | ||
| Brian F. Allen | COO and President | $2,169,145 | Mixed | 02 Apr 2025 | ||
| 8 Rivers Capital, LLC | 10%+ Owner | $1,380,375 | -$19,363,366 | -93% | Filing P/S | 08 Sep 2026 |
| NPEH, LLC | 10%+ Owner | $1,380,375 | -$19,363,366 | -93% | Filing P/S | 08 Sep 2026 |
| Damian R. Beauchamp | 10%+ Owner | $1,380,375 | -$4,839,990 | -78% | Filing P/S | 08 Sep 2026 |
| Kelliher Joseph T. | Director | $67,605 | Mixed | 03 Jun 2026 | ||
| Daniel J. Rice IV | Chief Executive Officer, Director, 10%+ Owner | $38,583 | Mixed | 08 Jun 2023 | ||
| Kelly Rosser | Chief Accounting Officer | $5,684 | Filing P/S | 02 Apr 2025 | ||
| Marc Horstman | Chief Operating Officer | $3,560 | Mixed | 02 Jun 2025 | ||
| SK INC. | 10%+ Owner | $0 | Mixed | 30 Jul 2025 | ||
| Cynda Beauchamp | 10%+ Owner | $0 | -$73,419 | -100% | Mixed | 31 Oct 2025 |
| Carol R. Peterson | Director | Mixed | 03 Jun 2026 | |||
| Alejandra Veltmann | Director | Mixed | 03 Jun 2026 | |||
| Ralph Alexander | Director | Mixed | 03 Jun 2026 | |||
| Carrie M. Fox | Director | Mixed | 08 Jun 2023 | |||
| James Wilmot Rogers | Chief Accounting Officer | Mixed | 08 Jun 2023 |
Recent insider transactions for Net Power Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -16.7% | $276,075 | $1.84 | -150,000 | 750,000 | 09 Sep 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -16.7% | $276,075 | $1.84 | -150,000 | 750,000 | 09 Sep 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -16.7% | $276,075 | $1.84 | -150,000 | 750,000 | 09 Sep 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -10% | $193,520 | $1.94 | -100,000 | 900,000 | 08 Sep 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -10% | $193,520 | $1.94 | -100,000 | 900,000 | 08 Sep 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -10% | $193,520 | $1.94 | -100,000 | 900,000 | 08 Sep 2026 | Direct |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -3.97% | $79,078 | $1.91 | -41,350 | 1,000,000 | 26 Aug 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -3.97% | $79,078 | $1.91 | -41,350 | 1,000,000 | 26 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -3.97% | $79,078 | $1.91 | -41,350 | 1,000,000 | 26 Aug 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -16.2% | $384,255 | $1.91 | -201,550 | 1,041,350 | 25 Aug 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -16.2% | $384,255 | $1.91 | -201,550 | 1,041,350 | 25 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -16.2% | $384,255 | $1.91 | -201,550 | 1,041,350 | 25 Aug 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -29% | $990,518 | $1.95 | -507,100 | 1,242,900 | 14 Aug 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -29% | $990,518 | $1.95 | -507,100 | 1,242,900 | 14 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -29% | $990,518 | $1.95 | -507,100 | 1,242,900 | 14 Aug 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -10.3% | $323,840 | $1.62 | -200,000 | 1,750,000 | 13 Aug 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -10.3% | $323,840 | $1.62 | -200,000 | 1,750,000 | 13 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -10.3% | $323,840 | $1.62 | -200,000 | 1,750,000 | 13 Aug 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -2.5% | $81,575 | $1.63 | -50,000 | 1,950,000 | 12 Aug 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -2.5% | $81,575 | $1.63 | -50,000 | 1,950,000 | 12 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -2.5% | $81,575 | $1.63 | -50,000 | 1,950,000 | 12 Aug 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -1.72% | $55,990 | $1.60 | -35,000 | 2,000,000 | 11 Aug 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -1.72% | $55,990 | $1.60 | -35,000 | 2,000,000 | 11 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -1.72% | $55,990 | $1.60 | -35,000 | 2,000,000 | 11 Aug 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -2.65% | $86,075 | $1.55 | -55,400 | 2,035,000 | 10 Aug 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -2.65% | $86,075 | $1.55 | -55,400 | 2,035,000 | 10 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -2.65% | $86,075 | $1.55 | -55,400 | 2,035,000 | 10 Aug 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -2.81% | $92,080 | $1.53 | -60,345 | 2,090,400 | 07 Aug 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -2.81% | $92,080 | $1.53 | -60,345 | 2,090,400 | 07 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -2.81% | $92,080 | $1.53 | -60,345 | 2,090,400 | 07 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -3.98% | $134,436 | $1.51 | -89,255 | 2,150,745 | 06 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -3.98% | $134,436 | $1.51 | -89,255 | 2,150,745 | 06 Aug 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -3.98% | $134,436 | $1.51 | -89,255 | 2,150,745 | 06 Aug 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -5.88% | $211,456 | $1.51 | -140,000 | 2,240,000 | 05 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -5.88% | $211,456 | $1.51 | -140,000 | 2,240,000 | 05 Aug 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -5.88% | $211,456 | $1.51 | -140,000 | 2,240,000 | 05 Aug 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -4.8% | $184,728 | $1.54 | -120,000 | 2,380,000 | 04 Aug 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -4.8% | $184,728 | $1.54 | -120,000 | 2,380,000 | 04 Aug 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -4.8% | $184,728 | $1.54 | -120,000 | 2,380,000 | 04 Aug 2026 | Direct |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -5.84% | $221,402 | $1.43 | -155,000 | 2,500,000 | 30 Jul 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -5.84% | $221,402 | $1.43 | -155,000 | 2,500,000 | 30 Jul 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -5.84% | $221,402 | $1.43 | -155,000 | 2,500,000 | 30 Jul 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -1.67% | $63,328 | $1.41 | -45,000 | 2,655,000 | 29 Jul 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -1.67% | $63,328 | $1.41 | -45,000 | 2,655,000 | 29 Jul 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -1.67% | $63,328 | $1.41 | -45,000 | 2,655,000 | 29 Jul 2026 | By: NPEH, LLC |
| Npeh, Llc | NPWR | Class A Common Stock | Sale | -2.03% | $82,229 | $1.47 | -55,858 | 2,700,000 | 28 Jul 2026 | Direct |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -2.03% | $82,229 | $1.47 | -55,858 | 2,700,000 | 28 Jul 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -2.03% | $82,229 | $1.47 | -55,858 | 2,700,000 | 28 Jul 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -1.4% | $58,971 | $1.51 | -39,142 | 2,755,858 | 23 Jul 2026 | By: NPEH, LLC |
| 8 Rivers Capital, LLC | NPWR | Class A Common Stock | Sale | -1.4% | $58,971 | $1.51 | -39,142 | 2,755,858 | 23 Jul 2026 | By: NPEH, LLC |
* marks a reported price that did not pass the local price check.