13F Insight
DOSSIER · 13F Holders · Q1 2026
NPWR

NET POWER INC

122 institutions still hold NET POWER INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 64107A105·122 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$47M
visible holders
Holders
122
filers reporting
Concentration
32.22%
Share Andrew L. #1
top holder share
AI Holders Summary · Q1 2026

122 institutions reported NPWR in Q1 2026. Share Andrew L. leads at 32.2% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
Share Andrew L.
CIK 0001693672
$15M9.8M7.11%Q1 202602
HITE Hedge Asset Management LLC
CIK 0001568939
$4M2.8M0.24%Q1 202603
PEAK6 LLC
CIK 0001389958
$4M2.3M0.01%Q1 202604
BlackRock, Inc.
CIK 0002012383
$3M2.1M0.00%Q1 202605
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$3M1.6M0.00%Q1 202606
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
$2M1.5M0.00%Q1 202607
Sourcerock Group LLC
CIK 0001822531
$2M1.5M0.09%Q1 202608
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$2M1.1M0.00%Q1 202609
COHEN & STEERS, INC.
CIK 0001284812
$1M892K0.00%Q1 202610
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$1M860K0.00%Q1 202611
Argentarii, LLC
CIK 0002030055
$1M749K0.41%Q1 202612
Nuveen, LLC
CIK 0001871926
$1M714K0.00%Q1 202613
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$1M704K0.00%Q1 202614
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$1M683K0.00%Q1 202615
STATE STREET CORP
CIK 0000093751
$957K614K0.00%Q1 202616
Tidal Investments LLC
CIK 0001600064
$832K533K0.00%Q1 202617
Defiance ETFs, LLC
CIK 0001732541
$832K533K0.01%Q1 202618
CenterBook Partners LP
CIK 0001872738
$683K438K0.04%Q1 202619
TUDOR INVESTMENT CORP ET AL
CIK 0000923093
$673K431K0.00%Q1 202620
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$671K430K0.00%Q1 2026
Page 1 of 7
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