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NPWR

NET Power Inc.
$1.65 -0.02 (-1.20%) At close · Jul 2
Market Cap
$370.86M
Shares
224,761,681

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 112
Total Value: $55,748,631
Total Shares: 35,736,341
Showing 1–100 of 119 holdings by value · page 1 of 2

Institutional Ownership Trend

12 quarters

Holder Concentration

Across 112 13F filers · Δ vs Dec 31, 2025
Top Holder
27.3%
Jun 2023 → Mar 2026 · range 27.3% – 39.9%
−1.6 pts
Top 5
52.1%
Jun 2023 → Mar 2026 · range 52.1% – 78.4%
−1.0 pts
Top 10
68.5%
Jun 2023 → Mar 2026 · range 68.5% – 95.8%
−2.7 pts
HHI
999
Jun 2023 → Mar 2026 · range 999 – 2,066
Broadly held−88

Quarterly Activity

vs Dec 31, 2025
New
16
Increased
40
Decreased
31
Sold Out
19
Unchanged
25
Holder count: -3
Institutional value: -27.6%
Shares held: +5.8%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mid HITE Hedge Asset Management LLC +2,014,333 2,763,424
Large PEAK6 LLC +940,476 2,287,515
Large RENAISSANCE TECHNOLOGIES LLC +609,200 703,800
Small Argentarii, LLC +485,142 748,649
Mega TWO SIGMA INVESTMENTS, LP +351,822 1,080,281

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega MILLENNIUM MANAGEMENT LLC −1,593,887 682,705
Mid CenterBook Partners LP −1,410,302 437,771
Mega JANE STREET GROUP, LLC −675,212 127,748
Large Empowered Funds, LLC −289,734 155,000
Large Point72 Asset Management, L.P. −206,881 34,091

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 1,643,795 $2,564,320
Mid Defiance ETFs, LLC 533,253 $831,874
Mega VANGUARD FIDUCIARY TRUST CO 249,023 $388,475
Mid GSA CAPITAL PARTNERS LLP 186,240 $290,534
Mid SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 184,083 $287,169

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 2,017,263 $4,599,358
Mega WELLINGTON MANAGEMENT GROUP LLP 274,327 $625,464
Large TWO SIGMA ADVISERS, LP 102,400 $233,472
Micro Worth Venture Partners, LLC 80,250 $182,970
Mid Quantbot Technologies LP 60,215 $137,290
Filter: New 16 Increased 40 Reduced 31 Sold out 19 Unchanged 25
Showing 100 of 119
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Small Share Andrew L. $15,237,300 27.33% 9,767,500
Mid HITE Hedge Asset Management LLC $4,310,941 7.73% 2,763,424
Mega BlackRock, Inc. $3,342,947 6.00% 2,142,916
Large PEAK6 LLC $3,101,615 5.56% 1,988,215
Mega VANGUARD CAPITAL MANAGEMENT LLC $2,564,320 4.60% 1,643,795
Large ADAGE CAPITAL PARTNERS GP, L.L.C. $2,402,400 4.31% 1,540,000
Mid Sourcerock Group LLC $2,346,436 4.21% 1,504,126
Mega TWO SIGMA INVESTMENTS, LP $1,685,238 3.02% 1,080,281
Large COHEN & STEERS, INC. $1,391,738 2.50% 892,140
Mega GEODE CAPITAL MANAGEMENT, LLC $1,342,201 2.41% 860,386
Small Argentarii, LLC $1,167,892 2.09% 748,649
Mega Nuveen, LLC $1,113,465 2.00% 713,760
Large RENAISSANCE TECHNOLOGIES LLC $1,097,928 1.97% 703,800
Mega MILLENNIUM MANAGEMENT LLC $1,065,019 1.91% 682,705
Mega STATE STREET CORP $957,113 1.72% 613,534
Mid Defiance ETFs, LLC Mutual Fund $831,874 1.49% 533,253
Large Tidal Investments LLC $831,874 1.49% 533,253
Mid CenterBook Partners LP $682,922 1.23% 437,771
Large TUDOR INVESTMENT CORP ET AL $672,598 1.21% 431,153
Mega UBS Group AG $577,001 1.04% 369,873
Large PEAK6 LLC $466,908 0.84% 299,300
Mid BOOTHBAY FUND MANAGEMENT, LLC $461,683 0.83% 295,951
Mega NORTHERN TRUST CORP Bank $455,555 0.82% 292,024
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $420,448 0.75% 269,518
Mega GOLDMAN SACHS GROUP INC $406,481 0.73% 260,565
Mega VANGUARD FIDUCIARY TRUST CO Bank $388,475 0.70% 249,023
Large FEDERATED HERMES, INC. $376,883 0.68% 241,592
Mega D. E. Shaw & Co., Inc. $367,219 0.66% 235,397
Mega CITADEL ADVISORS LLC $341,610 0.61% 218,981
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $335,712 0.60% 215,200
Mid SHELTON CAPITAL MANAGEMENT $312,468 0.56% 200,300
Mid GSA CAPITAL PARTNERS LLP $290,534 0.52% 186,240
Mid SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC $287,169 0.52% 184,083
Mega MORGAN STANLEY $286,717 0.51% 183,795
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $267,421 0.48% 171,424
Large Squarepoint Ops LLC $259,337 0.47% 166,242
Large Empowered Funds, LLC $241,800 0.43% 155,000
Mega AQR CAPITAL MANAGEMENT LLC $239,446 0.43% 153,493
Mega CITADEL ADVISORS LLC $214,188 0.38% 137,300
Large Janney Montgomery Scott LLC $207,480 0.37% 133,000
Mid SIR Capital Management, L.P. $160,957 0.29% 103,178
Mega DIMENSIONAL FUND ADVISORS LP $160,867 0.29% 103,121
Mega ALLIANCEBERNSTEIN L.P. $158,620 0.28% 101,680
Mid MOORE CAPITAL MANAGEMENT, LP $132,600 0.24% 85,000
Mega Bank of New York Mellon Corp Bank $131,111 0.24% 84,046
Mega JANE STREET GROUP, LLC $97,812 0.18% 62,700
Mega DEUTSCHE BANK AG\ Bank $84,516 0.15% 54,177
Mega LPL Financial LLC $82,719 0.15% 53,025
Mega JANE STREET GROUP, LLC $81,974 0.15% 52,548
Small Polymer Capital Management (US) LLC $79,444 0.14% 50,926
Mega RHUMBLINE ADVISERS $76,617 0.14% 49,114
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $68,172 0.12% 43,700
Large OSAIC HOLDINGS, INC. $63,936 0.11% 40,985
Large Qube Research & Technologies Ltd $57,060 0.10% 36,577
Large LMR Partners LLP $55,960 0.10% 35,872
Mega BANK OF AMERICA CORP /DE/ Bank $54,729 0.10% 35,083
Large Point72 Asset Management, L.P. $53,181 0.10% 34,091
Mid SIG BROKERAGE, LP Broker-Dealer $49,829 0.09% 31,942
Mid Engineers Gate Manager LP $48,282 0.09% 30,950
Mega WELLS FARGO & COMPANY/MN $44,951 0.08% 28,815
Small Family Manage LLC $40,923 0.07% 26,233
Large Caption Management, LLC $31,009 0.06% 19,878
Small OXFORD ASSET MANAGEMENT LLP $30,522 0.05% 19,566
Small SUMMIT SECURITIES GROUP LLC Broker-Dealer $30,050 0.05% 19,263
Small INTEGRITY ALLIANCE, LLC. $27,144 0.05% 17,400
Small Kapstone Financial Advisors LLC $27,136 0.05% 17,395
Mega CITADEL ADVISORS LLC $26,988 0.05% 17,300
Mega PRICE T ROWE ASSOCIATES INC /MD/ $26,563 0.05% 17,028
Mega JPMORGAN CHASE & CO $26,366 0.05% 16,902
Small Legacy Advisors, LLC $25,573 0.05% 16,393
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $23,585 0.04% 15,119
Mid GROUP ONE TRADING LLC $23,036 0.04% 14,767
Large CAPTRUST FINANCIAL ADVISORS $22,492 0.04% 14,418
Large SEI INVESTMENTS CO $20,052 0.04% 12,854
Mega JANE STREET GROUP, LLC $19,500 0.03% 12,500
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $19,417 0.03% 12,447
Mid Private Advisor Group, LLC $19,032 0.03% 12,200
Mega Vanguard Global Advisers, LLC $18,988 0.03% 12,172
Mid XTX Topco Ltd $18,860 0.03% 12,090
Mega Invesco Ltd. $17,602 0.03% 11,284
Mid INTECH INVESTMENT MANAGEMENT LLC $16,826 0.03% 10,786
Mid Tower Research Capital LLC (TRC) $16,587 0.03% 10,633
Large TRUIST FINANCIAL CORP $15,600 0.03% 10,000
Large CWM, LLC $14,350 0.03% 9,199
Mega BARCLAYS PLC $13,787 0.02% 8,839
Small NBC SECURITIES, INC. Broker-Dealer $9,890 0.02% 6,340
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $7,956 0.01% 5,100
Large FIFTH THIRD BANCORP Bank $7,800 0.01% 5,000
Mega ROYAL BANK OF CANADA Bank $6,969 0.01% 4,468
Large Police & Firemen's Retirement System of New Jersey Pension $6,633 0.01% 4,252
Mega Legal & General Group Plc $4,828 0.01% 3,095
Large JONES FINANCIAL COMPANIES LLLP $4,800 0.01% 3,077
Large Russell Investments Group, Ltd. $4,386 0.01% 2,812
Small Essential Partners LLC $4,302 0.01% 2,758
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $3,584 0.01% 2,298
Mid Ameritas Investment Partners, Inc. $3,232 0.01% 2,072
Mega FMR LLC $3,185 0.01% 2,042
Mega CITIGROUP INC $2,474 0.00% 1,586
Mid Blue Trust, Inc. $2,168 0.00% 1,390
Mid Sterling Capital Management LLC $2,026 0.00% 1,299
Key facts CIK 1845437 CUSIP 64107A105 Visit website Investor relations

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