13F Insight
DOSSIER · 13F Holders · Q4 2025Mega-capCrowded
NEPH

NEPHROS INC

31 institutions still hold NEPHROS INC as of Q4 2025. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 640671400·31 13F holders·last filed Dec 31, 2025
Market cap
—
▼ 7.6%
vs prior quarter
13F value held
$23M
60.0% inst. owned
of float
Holders
31
+28 QoQ
filers reporting
Activity
+8 / −65
+847 added · −774 reduced
this quarter
Concentration
76.76%
WEXFORD CAPITAL LP #1
top holder share
AI Holders Summary · Q4 2025

31 institutions reported NEPH in Q4 2025. WEXFORD CAPITAL LP leads at 76.8% of the visible book. +28 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
WEXFORD CAPITAL LP
CIK 0001048462
$18M3.6M3.40%Q4 202502
Topline Capital Management, LLC
CIK 0001792549
$2M582K0.29%Q1 202603
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$591,956199K0.00%Q1 202604
Cornerstone Capital, Inc.
CIK 0000819535
$383,526129K0.04%Q1 202605
BARD ASSOCIATES INC
CIK 0001105907
$361,182121K0.09%Q1 202606
Mesirow Financial Investment Management, Inc.
CIK 0001469475
$357,600120K0.01%Q1 202607
MORGAN STANLEY
CIK 0000895421
$330,527111K0.00%Q1 202608
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$296,21299K0.00%Q1 202609
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$217,37673K0.00%Q1 202610
HighTower Advisors, LLC
CIK 0001462245
$177,93660K0.00%Q1 202611
ESSEX INVESTMENT MANAGEMENT CO LLC
CIK 0000201772
$116,17239K0.02%Q1 202612
Quadrature Capital Ltd
CIK 0001651424
$112,26023K0.00%Q4 202513
VANGUARD FIDUCIARY TRUST CO
CIK 0000933478· Index
$109,96537K0.00%Q1 202614
BLAIR WILLIAM & CO/IL
CIK 0000902367
$108,02236K0.00%Q1 202615
MARSHALL WACE, LLP
CIK 0001318757
$107,27722K0.00%Q4 202516
CITADEL ADVISORS LLC
CIK 0001423053
$101,06521K0.00%Q4 202517
De Lisle Partners LLP
CIK 0002011184
$74,50025K0.01%Q1 202618
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$61,82021K0.00%Q1 202619
NAVELLIER & ASSOCIATES INC
CIK 0000872163
$56,99519K0.01%Q1 202620
STATE STREET CORP
CIK 0000093751
$46,78016K0.00%Q1 2026
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