NEPH · Nephros Inc

$4.08 -0.33 (-7.38%) At close · Aug 21

Market Cap

$44.31M

10.86M

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.

Quarter:

Holders: 33

Total Value: $18,967,893

Total Shares: 5,313,140

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 33 13F filers · Δ vs Mar 31, 2026

Top Holder

67.8%

+0.7 pts

Top 5

86.4%

+0.2 pts

Top 10

93.7%

−1.2 pts

HHI

4,735

Highly concentrated+79

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +6

Institutional value: +18.5%

Shares held: -1.1%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mid NAVELLIER & ASSOCIATES INC	+34,353	53,479
Mega MORGAN STANLEY	+18,000	128,915
Mega CITADEL ADVISORS LLC	+8,156	29,044
Mega NORTHERN TRUST CORP	+5,878	16,706
Mega DIMENSIONAL FUND ADVISORS LP	+1,419	22,164

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mid Mesirow Financial Investment Management, Inc.	−60,000	60,000
Small Topline Capital Management, LLC	−46,269	535,698
Large RENAISSANCE TECHNOLOGIES LLC	−21,896	77,504
Small De Lisle Partners LLP	−7,600	17,400
Small BARD ASSOCIATES INC	−3,199	118,003

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega BlackRock, Inc.	18,822	$67,193
Large MERCER GLOBAL ADVISORS INC /ADV	12,500	$44,625
Mega UBS Group AG	831	$2,966
Mid SBI Securities Co., Ltd.	150	$535
Large NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO	133	$474

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)	Open
Mid PRELUDE CAPITAL MANAGEMENT, LLC	13,680	$40,766

Filter: New 7 Increased 7 Reduced 9 Sold out 1 Unchanged 10

Showing 33 of 33

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

WEXFORD CAPITAL LP

$12,853,970

67.77%

3,600,552

Topline Capital Management, LLC

$1,912,441

10.08%

535,698

VANGUARD CAPITAL MANAGEMENT LLC

$709,155

3.74%

198,643

MORGAN STANLEY

$460,226

2.43%

128,915

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY SMITH BARNEY LLC	128,915	$460,226	100.0%	Defined

Cornerstone Capital, Inc.

$459,459

2.42%

128,700

BARD ASSOCIATES INC

$421,270

2.22%

118,003

RENAISSANCE TECHNOLOGIES LLC

$276,689

1.46%

77,504

GEODE CAPITAL MANAGEMENT, LLC

$250,838

1.32%

70,263

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	13,655	$48,748	19.4%	Defined
Held directly	56,608	$202,090	80.6%	Defined

Mesirow Financial Investment Management, Inc.

$214,200

1.13%

60,000

HighTower Advisors, LLC

$213,164

1.12%

59,710

NAVELLIER & ASSOCIATES INC

$190,920

1.01%

53,479

ESSEX INVESTMENT MANAGEMENT CO LLC

$138,969

0.73%

38,927

VANGUARD FIDUCIARY TRUST CO

$131,736

0.69%

36,901

BLAIR WILLIAM & CO/IL

$129,408

0.68%

36,249

CITADEL ADVISORS LLC

$103,687

0.55%

29,044

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	29,044	$103,687	100.0%	Defined

DIMENSIONAL FUND ADVISORS LP

$79,124

0.42%

22,164

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Ireland Ltd	1,054	$3,762	4.8%	Defined
Held directly	21,110	$75,362	95.2%	Sole

BlackRock, Inc.

$67,193

0.35%

18,822

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Investment Management, LLC	1,080	$3,855	5.7%	Sole
BlackRock Fund Advisors	17,742	$63,338	94.3%	Sole

De Lisle Partners LLP

$62,118

0.33%

17,400

NORTHERN TRUST CORP

$59,640

0.31%

16,706

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	16,706	$59,640	100.0%	Defined

STATE STREET CORP

$56,041

0.30%

15,698

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	15,698	$56,041	100.0%	Defined

GOLDMAN SACHS GROUP INC

$45,824

0.24%

12,836

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	12,836	$45,824	100.0%	Defined

MERCER GLOBAL ADVISORS INC /ADV

$44,625

0.24%

12,500

Cannell & Spears LLC

$39,270

0.21%

11,000

ELKHORN PARTNERS LIMITED PARTNERSHIP

$39,270

0.21%

11,000

UBS Group AG

$2,966

0.02%

831

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Securities LLC	831	$2,966	100.0%	Defined

ROYAL BANK OF CANADA

$2,952

0.02%

827

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC Capital Markets, LLC	827	$2,952	100.0%	Defined

JONES FINANCIAL COMPANIES LLLP

$810

0.00%

227

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	227	$810	100.0%	Sole

OSAIC HOLDINGS, INC.

$624

0.00%

175

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	175	$624	100.0%	Defined

SBI Securities Co., Ltd.

$535

0.00%

150

NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO

$474

0.00%

133

HARBOUR INVESTMENTS, INC.

$178

0.00%

BARCLAYS PLC

$96

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS CAPITAL INC.	27	$96	100.0%	Defined

FMR LLC

$21

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STRATEGIC ADVISERS LLC	6	$21	100.0%	Defined

Key facts CIK 1196298 CUSIP 640671400 13F (30d) 31 filings 31 filers Visit website Investor relations