Ticker · held by 4 filers

NPWR

NET POWER INC

All tracked filers currently holding NPWR, ranked by position size. Each row links through to the filer's full portfolio.

Total value held

$44.2M

Total shares

4,576,812

Filers holding

4 · 5 positions

Caveat

long only · 13F-eligible managers only

Filers holding NPWR

sorted by position size · click any filer to see their full portfolio

# Filer Class Shares Value (USD) % of port

1 Greenlight Capital · David Einhorn COM CL A 2,992,110 $30.2M 1.48%

2 BlackRock · Larry Fink COM CL A 1,379,402 $13.6M 0.00%

3 Renaissance Technologies · Jim Simons (founder) COM CL A 94,600 $215.7K 0.00%

4 Citadel Advisors · Ken Griffin CALLCOM CL A 71,800 $163.7K 0.00%

5 Citadel Advisors · Ken Griffin PUTCOM CL A 38,900 $88.7K 0.00%

What this is

This page reverses the usual 13F view: instead of "what does Buffett hold," it answers "who holds NVDA?" Across the dozen tracked filers, all current 13F-disclosed holders of NPWR are listed, with the position size and what fraction of each filer's overall portfolio it represents.

Caveats: only the filers tracked here are included (~12 names) — not the whole 13F universe (~6,000 filers). Position values are at the most recent quarter-end, not current market price. Only long positions are visible; shorts and synthetics aren't.

v0.2 · 2026 · data via SEC EDGAR · CUSIP→ticker via OpenFIGI