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NEPH · NASDAQ · Medical - Instruments & Supplies

Nephros (NEPH)

Medical and commercial point-of-use filtration for water-management applications.

$4.26
At close+0.16 (+3.90%)
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Breakdown13F · 13D/G · Form 4

Institutions27 holders · as of Mar 31, 202649.45%5.37M shares
Insiders8 holders · as of Aug 14, 202618.58%2.02M shares
Otherremainder31.97%3.47M shares

10.86M company shares as of Sep 3, 2026 · institutions as of Mar 31, 2026 · holders as of their latest filing

Top shareholders13F · 13D/G · Form 4

HolderStakeSharesEvidence
Wexford Capital LPInstitution
33.15%3.60M13Fas of Mar 31, 2026
Topline Capital Management, LLCInstitution
5.36%581,96713Fas of Mar 31, 2026
Cowen Prime Advisors, a division of Cowen Prime Services LLCInstitution
5.30%575,07713Gfiled Jan 27, 2021 ↗
Ian CasselInsider
4.84%525,40813Gfiled Feb 28, 2022 ↗
Sandra F. PessinInsider
4.51%489,43513D/Afiled Oct 21, 2020 ↗
Daron Evans1Insiderofficer: CEO Specialty Renal Products
4.41%478,87413D/Afiled Jun 11, 2021 ↗
Vanguard Capital Management LLCInstitution
1.83%198,64313Fas of Mar 31, 2026
Robert R. Jr. BanksInsiderofficer: President and CEO
1.75%190,000Form 4filed Mar 25, 2026 ↗
Arthur H. AmronInsiderdirector
1.30%140,874Form 4filed Aug 14, 2026 ↗
Cornerstone Capital, Inc.Institution
1.19%128,70013Fas of Mar 31, 2026
Oliver J. SpandowInsiderdirector
1.13%122,881Form 4filed Nov 13, 2025 ↗
Bard Associates IncInstitution
1.12%121,20213Fas of Mar 31, 2026
Mesirow Financial Investment Management, Inc.Institution
1.10%120,00013Fas of Mar 31, 2026
Morgan StanleyInstitution
1.02%110,91513Fas of Mar 31, 2026
Renaissance Technologies LLCInstitution
0.92%99,40013Fas of Mar 31, 2026
Geode Capital Management, LLCInstitution
0.67%72,92513Fas of Mar 31, 2026
Judy KrandelInsiderofficer: Chief Financial Officer
0.63%68,861Form 4filed Mar 25, 2026 ↗
Hightower Advisors, LLCInstitution
0.55%59,71013Fas of Mar 31, 2026
Essex Investment Management Co LLCInstitution
0.36%38,98413Fas of Mar 31, 2026
Vanguard Fiduciary Trust CoInstitution
0.34%36,90113Fas of Mar 31, 2026
Blair William & Co/ILInstitution
0.33%36,24913Fas of Mar 31, 2026
De Lisle Partners LLPInstitution
0.23%25,00013Fas of Mar 31, 2026
Citadel Advisors LLCInstitution
0.19%20,88813Fas of Mar 31, 2026
Dimensional Fund Advisors LPInstitution
0.19%20,74513Fas of Mar 31, 2026
Navellier & Associates IncInstitution
0.18%19,12613Fas of Mar 31, 2026
  1. Daron Evans's transaction reports restate only vehicles that traded; the 2021 ownership statement (478.9K) is used instead.

13F — a manager's quarterly holdings · 13D/13G — an ownership statement filed at 5% or more · Form 4 — an insider's transaction report

Institutions13F, as of Mar 31, 2026

27 holders · 5.37M shares · 3 new positions · 9 increased · 9 reduced · 11 closed

HolderShares% outstandingChg q/qFiled
Wexford Capital LP3.60M33.15%−16.5KMay 15, 2026
Topline Capital Management, LLC582.0K5.36%−32.3KMay 15, 2026
Vanguard Capital Management LLC198.6K1.83%+198.6KnewMay 15, 2026
Cornerstone Capital, Inc.128.7K1.19%+128.7KnewMay 12, 2026
Bard Associates Inc121.2K1.12%−417May 8, 2026
Mesirow Financial Investment Management, Inc.120.0K1.10%+70.0KApr 21, 2026
Morgan Stanley110.9K1.02%+93.0KMay 15, 2026
Renaissance Technologies LLC99.4K0.92%−4.4KMay 14, 2026

Ownership statements13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
Topline Capital Management, LLC5.60%595.3K13GNov 14, 2025 ↗

Insider tradesForm 4

Latest trades

No open-market trades in the last 12 months.

CongressHouse and Senate disclosures

Not reported.