Ticker · CUSIP 64107A105

NPWR

NET POWER INC

Industrials·Specialty Industrial Machinery

···Share

Holders (tracked)

Combined shares

3,961,844

Combined value

$9.03M

Last close

$1.69

Quarter

2025Q4

Price is -25.9% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$1.69-0.29 (-14.65%)H $4.85 · L $1.49 · Avg Vol 1.4M

Position opened

Tracked holders · last 8 quarters

+2 vs previous quarter over the last 8.

SEC event timeline

17 events

Ken Griffin (Citadel Advisors) exited2026-02-17
−73,044 shares · 2025Q4
Position
D.E. Shaw & Co. added2026-02-17
+1,671 shares · 2025Q4
Position
Two Sigma Investments trimmed2026-02-17
−93,334 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−88,654 shares · 2025Q4
Position
Steve Cohen (Point72) opened position2026-02-17
+240,972 shares · 2025Q4
Position
Wellington Management trimmed2026-02-17
−242,181 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) opened position2026-02-17
+84,887 shares · 2025Q4
Position
AQR Capital Management added2026-02-17
+19,149 shares · 2025Q4
Position
Renaissance Technologies opened position2026-02-12
+94,600 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+1,206,450 shares · 2025Q3
Position
Steve Cohen (Point72) exited2025-11-14
−52,527 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+220,831 shares · 2025Q3
Position
D.E. Shaw & Co. added2025-11-14
+48,610 shares · 2025Q3
Position
Wellington Management added2025-11-14
+22,159 shares · 2025Q3
Position
AQR Capital Management added2025-11-14
+14,073 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+5,268 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-12
−227,438 shares · 2024Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for NPWR →

Follow-the-investor returns

If you'd copied each holder of NPWR…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Renaissance Technologies	2025Q4	$2.28	-25.9%	$160K
AQR Capital Management	2025Q2	$2.54	-33.5%	$96K
Ken Griffin (Citadel Advisors)	2023Q4	$2.58	-34.6%	$121K
Ken Griffin (Citadel Advisors)	2023Q4	$2.58	-34.6%	$121K
Steve Cohen (Point72)	2023Q3	$2.68	-36.8%	$407K
T. Rowe Price	2025Q1	$2.81	-39.8%	$29K
Two Sigma Investments	2024Q4	$3.00	-43.6%	$1.2M
Izzy Englander (Millennium Mgmt)	2023Q2	$4.08	-58.5%	$3.8M
D.E. Shaw & Co.	2024Q2	$5.62	-69.9%	$131K
Paul Tudor Jones (Tudor Investment)	2024Q3	$6.26	-73.0%	$143K
Wellington Management	2023Q2	$10.29	-83.6%	$464K

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions3

Steve Cohen (Point72)
+240,972
$549K
Renaissance Technologies
+94,600
$216K
Paul Tudor Jones (Tudor Investment)
+84,887
$194K

Added to2

AQR Capital Management
+19,149
$44K
D.E. Shaw & Co.
+1,671
$4K

Trimmed3

Wellington Management
−242,181
$552K
Two Sigma Investments
−93,334
$213K
Izzy Englander (Millennium Mgmt)
−88,654
$202K

Exited1

Ken Griffin (Citadel Advisors)
−73,044
$220K

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2023Q2	3	3,545,777	$46.1M	—
2023Q3	4	3,641,556	$55.0M	+1
2023Q4	5	3,386,758	$34.2M	+1
2024Q1	6	673,972	$7.7M	+1
2024Q2	8	2,872,468	$28.2M	+2
2024Q3	7	1,262,293	$8.8M	-1
2024Q4	7	1,362,573	$14.4M	—
2025Q1	8	1,765,966	$4.6M	+1
2025Q2	9	2,470,170	$6.1M	+1
2025Q3	9	4,037,978	$12.2M	—
2025Q4	11	3,961,844	$9.0M	+2

Who owns NPWR

11 super-investors · 2025Q4

Tracked stake

3.96M

Combined value

$9M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New3Added2Trim3Sold2Held1

#	Manager	Shares	Value	% of book	Last action	8Q trend
1	Izzy Englander Millennium Mgmt	2.28M	$5M	0.0%	Trim−88.7K
2	Two Sigma Investments	728.5K	$2M	0.0%	Trim−93.3K
3	Wellington Management	274.3K	$625K	0.0%	Trim−242.2K
4	Steve Cohen Point72	241.0K	$549K	0.0%	New+241.0K
5	Renaissance Technologies	94.6K	$216K	0.0%	New+94.6K	—
6	Paul Tudor Jones Tudor Investment	84.9K	$194K	0.0%	New+84.9K
7	D.E. Shaw & Co.	77.7K	$177K	0.0%	Added+1.7K
8	Ken Griffin Citadel Advisors	71.8K	$164K	0.0%	Sold−73.0K
9	AQR Capital Management	56.6K	$129K	0.0%	Added+19.1K
10	Ken Griffin Citadel Advisors	38.9K	$89K	0.0%	Sold−73.0K
11	T. Rowe Price	17.0K	$39K	0.0%	Held

Recent moves

20 transactions

TRIMTwo Sigma Investments
−93,334 · 2025Q4
ADDAQR Capital Management
+19,149 · 2025Q4
ADDD.E. Shaw & Co.
+1,671 · 2025Q4
NEWSteve Cohen (Point72)
+240,972 · 2025Q4
TRIMWellington Management
−242,181 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−88,654 · 2025Q4
SOLDKen Griffin (Citadel Advisors)
−73,044 · 2025Q4
NEWPaul Tudor Jones (Tudor Investment)
+84,887 · 2025Q4
NEWRenaissance Technologies
+94,600 · 2025Q4
ADDT. Rowe Price
+5,268 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+1,206,450 · 2025Q3
SOLDSteve Cohen (Point72)
−52,527 · 2025Q3
ADDWellington Management
+22,159 · 2025Q3
ADDD.E. Shaw & Co.
+48,610 · 2025Q3
ADDTwo Sigma Investments
+220,831 · 2025Q3
ADDAQR Capital Management
+14,073 · 2025Q3
SOLDNorges Bank (Norway SWF)
−227,438 · 2024Q3
ADDIzzy Englander (Millennium Mgmt)
+467,616 · 2025Q2
ADDSteve Cohen (Point72)
+45,769 · 2025Q2
ADDTwo Sigma Investments
+528,755 · 2025Q2

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