NPWR · Net Power Inc. · Shareholders & Ownership

$0.85 -0.04 (-4.44%) Q2 2026 earnings call transcript

Russell 2000 member Rebalance outlook locked

Market Cap

$200.93M

224.86M

Volume · Oct 29 351K Avg daily vol (3M) 718.29K

Every disclosed holder of NPWR in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns NPWR

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	119	38,609,995	17.17%	Yes
Insiders (Forms 3, 4, 5)	0	0	0.00%	No
13D/G-only blocks	3	25,974,583	11.55%	Yes
Remaining	—	160,273,983	71.28%	Rest
Registered funds (N-PORT, not summed)	78	8,306,647	3.69%	No

Shares outstanding: 224,858,561, the issuer's latest cover-page count restated onto today's split basis.

Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of NPWR

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BEAUCHAMP DAMIAN R. Insider CIK 1973442 · Jul 30, 2025 10% Owner, issuer-wide, not summed	26,729,880	11.89%	—	Jul 30, 2025	10% Owner, issuer-wide, not summed
2	Share Andrew L. 13F CIK 1693672 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	9,767,500	4.34%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
3	J. Kyle Derham 13G CIK 1845421 · Unknown · Dec 31, 2023 Rule 13d-1(d), exempt investor	4,601,303	2.05%	—	Dec 31, 2023	Rule 13d-1(d), exempt investor
4	HITE Hedge Asset Management LLC 13F CIK 1568939 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,852,670	1.27%	+89,246	Jun 30, 2026	carried, not yet filed for the newest quarter
5	ADAGE CAPITAL PARTNERS GP, L.L.C. 13F CIK 1165408 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,840,000	1.26%	+1,300,000	Jun 30, 2026	carried, not yet filed for the newest quarter
6	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	2,416,294	1.07%	+273,378	Jun 30, 2026	carried, not yet filed for the newest quarter
6.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	1,059,221	0.47%	+155,490	Jun 30, 2026	iShares Trust, not summed
6.2	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	357,978	0.16%	+29,888	Jun 30, 2026	iShares Trust, not summed
6.3	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	99,401	0.04%	+69,366	Jun 30, 2026	Quantitative Master Series LLC, not summed
6.4	iShares Russell Small/Mid-Cap Index Fund Fund S000050373 · Registered fund · Jul 31, 2026 BlackRock Funds, not summed	4,000	0.00%	0	Jul 31, 2026	BlackRock Funds, not summed
6.5	BlackRock Small Cap Index V.I. Fund Fund S000059910 · Registered fund · Jun 30, 2026 BlackRock Variable Series Funds, Inc., not summed	2,585	0.00%	0	Jun 30, 2026	BlackRock Variable Series Funds, Inc., not summed
7	KENSICO CAPITAL MANAGEMENT CORP 13G CIK 1113000 · Registered investment adviser · Dec 31, 2023 Rule 13d-1(b), qualified institution	2,400,500	1.07%	—	Dec 31, 2023	Rule 13d-1(b), qualified institution
8	PEAK6 LLC 13F CIK 1389958 · Broker-dealer · Jun 30, 2026 carried, not yet filed for the newest quarter	1,985,754	0.88%	-2,461	Jun 30, 2026	carried, not yet filed for the newest quarter
9	Beauchamp Cynda Insider CIK 2079418 · Nov 2, 2025 10% Owner, issuer-wide, not summed	1,847,130	0.82%	—	Nov 2, 2025	10% Owner, issuer-wide, not summed
10	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,802,372	0.80%	+158,577	Jun 30, 2026	carried, not yet filed for the newest quarter
11	Defiance AI & Power Infrastructure ETF Fund S000090210 · Registered fund · Aug 31, 2026 Tidal Trust II, not summed	1,713,512	0.76%	+493,764	Aug 31, 2026	Tidal Trust II, not summed
12	Defiance ETFs, LLC 13F CIK 1732541 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,555,837	0.69%	+1,022,584	Jun 30, 2026	carried, not yet filed for the newest quarter
13	Tidal Investments LLC 13F CIK 1600064 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,546,562	0.69%	+1,013,309	Jun 30, 2026	carried, not yet filed for the newest quarter
14	Sourcerock Group LLC 13F CIK 1822531 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,400,110	0.62%	-104,016	Jun 30, 2026	carried, not yet filed for the newest quarter
15	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,336,582	0.59%	+236,590	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
16	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,006,014	0.45%	+145,628	Jun 30, 2026	carried, not yet filed for the newest quarter
17	COHEN & STEERS, INC. 13F CIK 1284812 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	888,954	0.40%	-3,186	Jun 30, 2026	carried, not yet filed for the newest quarter
17.1	Cohen & Steers Future of Energy Fund, Inc. Fund S000042155 · Registered fund · May 31, 2026 Cohen & Steers Future of Energy Fund, INC, not summed	160,804	0.07%	0	May 31, 2026	Cohen & Steers Future of Energy Fund, INC, not summed
18	GSA CAPITAL PARTNERS LLP 13F CIK 1362033 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	851,296	0.38%	+665,056	Jun 30, 2026	carried, not yet filed for the newest quarter
19	8 Rivers Capital, LLC Insider CIK 1981100 · Sep 9, 2026 10% Owner, issuer-wide, not summed	750,000	0.33%	-250,000	Sep 9, 2026	10% Owner, issuer-wide, not summed
19.1	8 Rivers Capital, LLC 13D CIK 1981100 · Unknown · Aug 13, 2026 Item 4 purpose: Other	18,972,780	8.44%	-1,722,100	Aug 13, 2026
20	NPEH, LLC Insider CIK 1981772 · Sep 9, 2026 10% Owner, issuer-wide, not summed	750,000	0.33%	-250,000	Sep 9, 2026	10% Owner, issuer-wide, not summed
21	Argentarii, LLC 13F CIK 2030055 · Registered investment adviser · Sep 30, 2026	746,799	0.33%	0	Sep 30, 2026
22	COHEN & STEERS INFRASTRUCTURE FUND INC Fund · Registered fund · Jun 30, 2026 COHEN & STEERS INFRASTRUCTURE FUND INC, not summed	731,336	0.33%	—	Jun 30, 2026	COHEN & STEERS INFRASTRUCTURE FUND INC, not summed
23	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	660,570	0.29%	-419,711	Jun 30, 2026	carried, not yet filed for the newest quarter
24	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	624,238	0.28%	+10,704	Jun 30, 2026	carried, not yet filed for the newest quarter
24.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	11,800	0.01%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
24.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	898	0.00%	0	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
25	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	610,961	0.27%	+241,088	Jun 30, 2026	carried, not yet filed for the newest quarter
26	ALLEN BRIAN F. Insider CIK 1975816 · Apr 2, 2025 COO and President, issuer-wide, not summed	568,939	0.25%	+119,862	Apr 2, 2025	COO and President, issuer-wide, not summed
27	Shuman Ned Leland Insider CIK 2137194 · May 18, 2026 Chief Financial Officer, issuer-wide, not summed	529,801	0.24%	0	May 18, 2026	Chief Financial Officer, issuer-wide, not summed
28	PATEL AKASH S. Insider CIK 1979780 · Apr 3, 2025 Chief Financial Officer, issuer-wide, not summed	457,790	0.20%	-182,658	Apr 3, 2025	Chief Financial Officer, issuer-wide, not summed
29	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	442,118	0.20%	-1,594	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
30	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	412,502	0.18%	+177,105	Jun 30, 2026	carried, not yet filed for the newest quarter
31	TUDOR INVESTMENT CORP ET AL 13F CIK 923093 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	397,515	0.18%	-33,638	Jun 30, 2026	carried, not yet filed for the newest quarter
32	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	385,283	0.17%	+231,790	Jun 30, 2026	carried, not yet filed for the newest quarter
32.1	AQR Small Cap Multi-Style Fund Fund S000040064 · Registered fund · Jun 30, 2026 AQR Funds, not summed	16,252	0.01%	—	Jun 30, 2026	AQR Funds, not summed
33	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	354,206	0.16%	-349,594	Jun 30, 2026	carried, not yet filed for the newest quarter
34	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	334,814	0.15%	+42,790	Jun 30, 2026	carried, not yet filed for the newest quarter
34.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	23,388	0.01%	-2,011	Jun 30, 2026	Northern Funds, not summed
35	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	324,611	0.14%	+59,912	Jun 30, 2026	carried, not yet filed for the newest quarter
36	Nuveen, LLC 13F CIK 1871926 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	288,876	0.13%	-424,884	Jun 30, 2026	carried, not yet filed for the newest quarter
36.1	Nuveen Equity Index Fund Fund S000005360 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	220,291	0.10%	-451,871	Jul 31, 2026	TIAA-CREF Funds, not summed
36.2	Nuveen Small Cap Blend Index Fund Fund S000005367 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	55,731	0.02%	+26,987	Jul 31, 2026	TIAA-CREF Funds, not summed
37	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	288,276	0.13%	+18,758	Jun 30, 2026	carried, not yet filed for the newest quarter
37.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · Aug 31, 2026 SCHWAB STRATEGIC TRUST, not summed	179,741	0.08%	-1,599	Aug 31, 2026	SCHWAB STRATEGIC TRUST, not summed
37.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	107,089	0.05%	+22,244	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
38	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	282,441	0.13%	+33,418	Jun 30, 2026	carried, not yet filed for the newest quarter
39	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	270,736	0.12%	+86,941	Jun 30, 2026	carried, not yet filed for the newest quarter
40	BOOTHBAY FUND MANAGEMENT, LLC 13F CIK 1549230 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	263,298	0.12%	-32,653	Jun 30, 2026	carried, not yet filed for the newest quarter
41	SUSQUEHANNA INTERNATIONAL GROUP, LLP 13F CIK 1446194 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	261,027	0.12%	+89,603	Jun 30, 2026	carried, not yet filed for the newest quarter
42	FEDERATED HERMES, INC. 13F CIK 1056288 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	248,208	0.11%	+6,616	Jun 30, 2026	carried, not yet filed for the newest quarter
43	MRA Advisory Group 13F CIK 1841816 · Unknown · Sep 30, 2026	214,893	0.10%	+214,893	Sep 30, 2026
44	SHELTON CAPITAL MANAGEMENT 13F CIK 1002784 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	200,300	0.09%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
44.1	Shelton Sustainable Equity Fund Fund S000039758 · Registered fund · May 31, 2026 SHELTON FUNDS, not summed	200,000	0.09%	0	May 31, 2026	SHELTON FUNDS, not summed
45	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	200,079	0.09%	+44,170	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
46	Alexander Ralph Insider CIK 1358507 · Jun 3, 2026 Director, issuer-wide, not summed	176,151	0.08%	+71,770	Jun 3, 2026	Director, issuer-wide, not summed
47	Kelliher Joseph T Insider CIK 1464551 · Jun 3, 2026 Director, issuer-wide, not summed	176,151	0.08%	+71,770	Jun 3, 2026	Director, issuer-wide, not summed
48	PETERSON CAROL R. Insider CIK 1973456 · Jun 3, 2026 Director, issuer-wide, not summed	176,151	0.08%	+71,770	Jun 3, 2026	Director, issuer-wide, not summed
49	Veltmann Alejandra Insider CIK 1564633 · Jun 3, 2026 Director, issuer-wide, not summed	176,151	0.08%	+71,770	Jun 3, 2026	Director, issuer-wide, not summed
50	Horstman Marc Insider CIK 2070734 · Apr 15, 2025 Chief Operating Officer, issuer-wide, not summed	167,659	0.07%	—	Apr 15, 2025	Chief Operating Officer, issuer-wide, not summed

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 185 holders

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Key facts CIK 1845437 CUSIP 64107A105 13F (30d) 13 filings 13 filers Visit website Investor relations