NEPHROS INC (NEPH) Institutional Ownership Changes & 13F Activity

NEPHROS INC (NEPH). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Renaissance Technologies LLCSell-4,37299,400$296,212
Q4 2025Renaissance Technologies LLCBuy21,272103,772$506,407
Q3 2025Renaissance Technologies LLCBuy71,60082,500$390,225
Q2 2025Renaissance Technologies LLCSell-13,54410,900$44,581
Q3 2024Renaissance Technologies LLCSell-16,55624,444$41,799
Q2 2024Renaissance Technologies LLCSell-20041,000$86,510
Q1 2024Renaissance Technologies LLCBuy27,49541,200$90
Q2 2023Renaissance Technologies LLCSell-9,49513,705$21
Q1 2023Renaissance Technologies LLCSell-8,86423,200$25
Q4 2022Renaissance Technologies LLCBuy9,76432,064$37
Q3 2022Renaissance Technologies LLCBuy1,98322,300$20
Q1 2022Renaissance Technologies LLCBuy2,41720,317$89
Q2 2020Renaissance Technologies LLCBuy17,90017,900$150

Frequently asked questions about NEPH activity

  • Which institutional owners are buying NEPH?

    Institutional owners buying NEPH include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in NEPH activity?

    "Buy" means an investor increased their reported position in NEPH compared to the prior reporting period. This reflects growing exposure to NEPHROS INC (NEPH) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in NEPH increasing?

    Institutional interest in NEPH can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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