Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Net Power Inc.

CIK 0001845437NPWRNPWR-WT· quarter ending 2026-06-30

Shares outstanding

224,858,561

as of 2026-08-11 · 10-Q cover page, filed 2026-08-13

Held by 13F filers

38,420,554

43.4% of Common Class A

Holders

120

+7 vs 2026-03-31 · 19 new, 12 exited

Value

$64.1M

shares +9.1% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-13, as of 2026-08-11)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common Class A	NPWR · NYSE	88,480,681	38,420,554	43.4%	120	64107A105
Common Class B	not listed	136,377,880	—	—

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	64107A105	COM CL A	120	38,420,554	88,480,681	43.4%	$64.1M	4 call / 3 put	13DG	holders →
	64107A113	*W EXP 06/08/202not common	22	10,515,313	—	—	$3.2M	1 call / 0 put	prefix	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (120 of 120 · 64107A105)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	Share Andrew L.	9,767,500	11.04%	$16.3M	—
2	HITE Hedge Asset Management LLC	2,852,670	3.22%	$4.8M	+89,246 (+3.2%)
3	ADAGE CAPITAL PARTNERS GP, L.L.C.	2,840,000	3.21%	$4.7M	+1,300,000 (+84.4%)
4	BlackRock, Inc.	2,416,294	2.73%	$4.0M	+273,378 (+12.8%)
5	PEAK6 LLC	1,985,754	2.24%	$3.3M	-2,461 (-0.1%)
6	VANGUARD CAPITAL MANAGEMENT LLC	1,802,372	2.04%	$3.0M	+158,577 (+9.6%)
7	Defiance ETFs, LLC	1,555,837	1.76%	$2.6M	+1,022,584 (+191.8%)
8	Tidal Investments LLC	1,546,562	1.75%	$2.6M	+1,013,309 (+190.0%)
9	Sourcerock Group LLC	1,400,110	1.58%	$2.3M	-104,016 (-6.9%)
10	GEODE CAPITAL MANAGEMENT, LLC	1,006,014	1.14%	$1.7M	+145,628 (+16.9%)
11	COHEN & STEERS, INC.	888,954	1.00%	$1.5M	-3,186 (-0.4%)
12	GSA CAPITAL PARTNERS LLP	851,296	0.96%	$1.4M	+665,056 (+357.1%)
13	Argentarii, LLC	746,799	0.84%	$1.2M	-1,850 (-0.2%)
14	TWO SIGMA INVESTMENTS, LP	660,570	0.75%	$1.1M	-419,711 (-38.9%)
15	STATE STREET CORP	624,238	0.71%	$1.0M	+10,704 (+1.7%)
16	UBS Group AG	610,961	0.69%	$1.0M	+241,088 (+65.2%)
17	D. E. Shaw & Co., Inc.	412,502	0.47%	$689K	+177,105 (+75.2%)
18	TUDOR INVESTMENT CORP ET AL	397,515	0.45%	$664K	-33,638 (-7.8%)
19	AQR CAPITAL MANAGEMENT LLC	385,283	0.44%	$643K	+231,790 (+151.0%)
20	RENAISSANCE TECHNOLOGIES LLC	354,206	0.40%	$592K	-349,594 (-49.7%)
21	NORTHERN TRUST CORP	334,814	0.38%	$559K	+42,790 (+14.7%)
22	VANGUARD PORTFOLIO MANAGEMENT LLC	324,611	0.37%	$542K	+59,912 (+22.6%)
23	Nuveen, LLC	288,876	0.33%	$482K	-424,884 (-59.5%)
24	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	288,276	0.33%	$481K	+18,758 (+7.0%)
25	VANGUARD FIDUCIARY TRUST CO	282,441	0.32%	$472K	+33,418 (+13.4%)
26	MORGAN STANLEY	270,736	0.31%	$452K	+86,941 (+47.3%)
27	BOOTHBAY FUND MANAGEMENT, LLC	263,298	0.30%	$440K	-32,653 (-11.0%)
28	SUSQUEHANNA INTERNATIONAL GROUP, LLP	261,027	0.30%	$436K	+89,603 (+52.3%)
29	FEDERATED HERMES, INC.	248,208	0.28%	$415K	+6,616 (+2.7%)
30	SHELTON CAPITAL MANAGEMENT	200,300	0.23%	$335K	—
31	DIMENSIONAL FUND ADVISORS LP	163,443	0.18%	$273K	+60,322 (+58.5%)
32	GOLDMAN SACHS GROUP INC	151,365	0.17%	$253K	-109,200 (-41.9%)
33	SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC	141,882	0.16%	$237K	-42,201 (-22.9%)
34	Janney Montgomery Scott LLC	133,000	0.15%	$222K	—
35	Caption Management, LLC	122,452	0.14%	$204K	+102,574 (+516.0%)
36	ALLIANCEBERNSTEIN L.P.	117,680	0.13%	$184K	+16,000 (+15.7%)
37	SIR Capital Management, L.P.	109,651	0.12%	$183K	+6,473 (+6.3%)
38	LOS ANGELES CAPITAL MANAGEMENT LLC	96,430	0.11%	$161K	NEW
39	MOORE CAPITAL MANAGEMENT, LP	85,000	0.10%	$142K	—
40	Bank of New York Mellon Corp	83,821	0.09%	$140K	-225 (-0.3%)
41	SIMPLEX TRADING, LLC	77,604	0.09%	$130K	NEW
42	XTX Topco Ltd	73,944	0.08%	$123K	+61,854 (+511.6%)
43	HRT FINANCIAL LP	60,620	0.07%	$101K	NEW
44	LPL Financial LLC	57,074	0.06%	$95K	+4,049 (+7.6%)
45	DEUTSCHE BANK AG\	56,064	0.06%	$94K	+1,887 (+3.5%)
46	Qube Research & Technologies Ltd	55,825	0.06%	$93K	+19,248 (+52.6%)
47	RHUMBLINE ADVISERS	53,919	0.06%	$90K	+4,805 (+9.8%)
48	IMC-Chicago, LLC	41,449	0.05%	$69K	NEW
49	OSAIC HOLDINGS, INC.	40,785	0.05%	$68K	-200 (-0.5%)
50	MILLENNIUM MANAGEMENT LLC	37,844	0.04%	$63K	-644,861 (-94.5%)
51	WELLS FARGO & COMPANY/MN	35,383	0.04%	$59K	+6,568 (+22.8%)
52	Jain Global LLC	34,819	0.04%	$58K	NEW
53	Russell Investments Group, Ltd.	33,503	0.04%	$56K	+30,691 (+1091.4%)
54	SIG BROKERAGE, LP	31,942	0.04%	$53K	—
55	CANADA PENSION PLAN INVESTMENT BOARD	29,700	0.03%	$50K	NEW
56	LMR Partners LLP	28,794	0.03%	$48K	-7,078 (-19.7%)
57	Quadrature Capital Ltd	26,934	0.03%	$45K	NEW
58	BANK OF AMERICA CORP /DE/	26,930	0.03%	$45K	-8,153 (-23.2%)
59	Virtu Financial LLC	26,027	0.03%	$43K	NEW
60	Cambridge Investment Research Advisors, Inc.	22,678	0.03%	$38K	NEW
61	TWO SIGMA SECURITIES, LLC	22,060	0.02%	$37K	NEW
62	Invesco Ltd.	22,043	0.02%	$37K	+10,759 (+95.3%)
63	CAPTRUST FINANCIAL ADVISORS	19,846	0.02%	$33K	+5,428 (+37.6%)
64	CITIGROUP INC	19,652	0.02%	$33K	+18,066 (+1139.1%)
65	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	19,454	0.02%	$32K	+4,335 (+28.7%)
66	Polymer Capital Management (US) LLC	18,731	0.02%	$31K	-32,195 (-63.2%)
67	GROUP ONE TRADING LLC	18,672	0.02%	$31K	+3,905 (+26.4%)
68	Mariner, LLC	18,552	0.02%	$31K	NEW
69	JPMORGAN CHASE & CO	18,211	0.02%	$30K	+1,309 (+7.7%)
70	INTEGRITY ALLIANCE, LLC.	17,400	0.02%	$29K	—
71	Kapstone Financial Advisors LLC	17,395	0.02%	$29K	—
72	PRICE T ROWE ASSOCIATES INC /MD/	17,028	0.02%	$29K	—
73	Legacy Advisors, LLC	16,413	0.02%	$27K	+20 (+0.1%)
74	Engineers Gate Manager LP	16,261	0.02%	$27K	-14,689 (-47.5%)
75	IEQ CAPITAL, LLC	16,207	0.02%	$27K	NEW
76	MERCER GLOBAL ADVISORS INC /ADV	16,047	0.02%	$27K	NEW
77	Point72 Asset Management, L.P.	15,340	0.02%	$26K	-18,751 (-55.0%)
78	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	13,528	0.02%	$21K	NEW
79	SEI INVESTMENTS CO	12,854	0.01%	$21K	—
80	ROYAL BANK OF CANADA	12,831	0.01%	$21K	+8,363 (+187.2%)
81	Creative Planning	12,217	0.01%	$20K	NEW
82	Private Advisor Group, LLC	12,200	0.01%	$20K	—
83	Vanguard Global Advisers, LLC	12,172	0.01%	$20K	—
84	Aigen Investment Management, LP	11,812	0.01%	$20K	NEW
85	Focus Partners Wealth	10,863	0.01%	$18K	NEW
86	INTECH INVESTMENT MANAGEMENT LLC	10,786	0.01%	$18K	—
87	TRUIST FINANCIAL CORP	10,000	0.01%	$17K	—
88	BARCLAYS PLC	8,948	0.01%	$15K	+109 (+1.2%)
89	Arax Advisory Partners	8,943	0.01%	$15K	+8,822 (+7290.9%)
90	Tower Research Capital LLC (TRC)	7,332	0.01%	$12K	-3,301 (-31.0%)
91	LANARK FINANCIAL, INC.	6,340	0.01%	$11K	—
92	NEW YORK STATE COMMON RETIREMENT FUND	5,100	0.01%	$9K	—
93	FIFTH THIRD BANCORP	5,000	0.01%	$8K	—
94	Police & Firemen's Retirement System of New Jersey	4,252	0.00%	$7K	—
95	Legal & General Group Plc	3,095	0.00%	$5K	—
96	Quarry LP	2,257	0.00%	$4K	NEW
97	Ameritas Investment Partners, Inc.	2,072	0.00%	$3K	—
98	FMR LLC	1,951	0.00%	$3K	-91 (-4.5%)
99	JONES FINANCIAL COMPANIES LLLP	1,800	0.00%	$3K	-1,277 (-41.5%)
100	EverSource Wealth Advisors, LLC	1,692	0.00%	$3K	+764 (+82.3%)
101	Allworth Financial LP	1,545	0.00%	$3K	+1,220 (+375.4%)
102	Blue Trust, Inc.	1,390	0.00%	$2K	—
103	McMillan Office, Inc.	1,000	0.00%	$2K	—
104	Sterling Capital Management LLC	733	0.00%	$1K	-566 (-43.6%)
105	Essential Partners LLC	711	0.00%	$1K	-2,047 (-74.2%)
106	ROTHSCHILD INVESTMENT LLC	550	0.00%	$919	+404 (+276.7%)
107	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	549	0.00%	$917	-1,749 (-76.1%)
108	Fortitude Family Office, LLC	545	0.00%	$910	+247 (+82.9%)
109	Capital Analysts, LLC	522	0.00%	$1K	—
110	Rialto Wealth Management, LLC	299	0.00%	$500	+62 (+26.2%)
111	Farther Finance Advisors, LLC	275	0.00%	$459	+99 (+56.3%)
112	NISA INVESTMENT ADVISORS, LLC	229	0.00%	$382	-202 (-46.9%)
113	IFP Advisors, Inc	106	0.00%	$177	-9 (-7.8%)
114	SJS Investment Consulting Inc.	57	0.00%	$96	+46 (+418.2%)
115	True Wealth Design, LLC	50	0.00%	$84	+38 (+316.7%)
116	Clearstead Advisors, LLC	26	0.00%	$44	-163 (-86.2%)
117	Caitong International Asset Management Co., Ltd	10	0.00%	$17	-710 (-98.6%)
118	SBI Securities Co., Ltd.	5	0.00%	$8	—
119	JPL Wealth Management, LLC	5	0.00%	$9	NEW
120	Optiver Holding B.V.	4	0.00%	$7	-296 (-98.7%)

Exited since 2026-03-31 (12 filers; largest 12 shown)

CenterBook Partners LP	−437,771
CITADEL ADVISORS LLC	−218,981
Squarepoint Ops LLC	−166,242
Empowered Funds, LLC	−155,000
JANE STREET GROUP, LLC	−52,548
Family Manage LLC	−26,233
OXFORD ASSET MANAGEMENT LLP	−19,566
SUMMIT SECURITIES GROUP LLC	−19,263
MANUFACTURERS LIFE INSURANCE COMPANY, THE	−12,447
CWM, LLC	−9,199
Sunbelt Securities, Inc.	−37
MAI Capital Management	−21

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
8RCH, LLC	SCHEDULE 13D/A	2026-08-17	2026-08-13	0	0%
8 RIVERS CAPITAL, LLC	SCHEDULE 13D/A	2026-08-17	2026-08-13	18,972,780	17.86%
DAMIAN BEAUCHAMP	SCHEDULE 13D/A	2026-08-17	2026-08-13	18,972,780	17.86%
NPEH, LLC	SCHEDULE 13D/A	2026-08-17	2026-08-13	18,972,780	17.86%
Cynda Beauchamp	SCHEDULE 13D/A	2025-11-04	2025-11-02	0	0%
ARECA, INC.	SCHEDULE 13D/A	2025-10-29	2025-10-27	0	0%
CHAMAEDOREA, INC.	SCHEDULE 13D/A	2025-10-29	2025-10-27	0	0%
TILLANDSIA, INC.	SCHEDULE 13D/A	2025-10-29	2025-10-27	0	0%
SK INC.	SCHEDULE 13D/A	2025-08-01	2025-07-30	0	0%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.