Nephros (NEPH) Institutional Ownership $4.26 +0.05 (+1.19%) Closing price 09/12/2025 03:57 PM EasternExtended Trading$4.23 -0.03 (-0.70%) As of 09/12/2025 05:26 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Ownership Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Institutional Ownership Changes (13F Filings) for Nephros (NASDAQ:NEPH)CurrentInstitutional OwnershipPercentage41.10%Number ofInstitutional Buyers(last 12 months)2TotalInstitutional Inflows(last 12 months)$855.51KNumber ofInstitutional Sellers(last 12 months)2TotalInstitutional Outflows(last 12 months)$145.76K Get NEPH Insider Trade Alerts Want to know when executives and insiders are buying or selling Nephros stock? 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Skip Chart & View Institutional Buying and Selling Data NEPH Institutional Buying and Selling by Quarter Nephros Major Shareholders & Ownership History Export to ExcelReporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails8/15/2025 Topline Capital Management LLC477,449$1.95M0.3%+13.1%4.504% 8/15/2025 Elkhorn Partners Limited Partnership14,500$59K0.0%-62.7%0.137% 8/8/2025 Geode Capital Management LLC93,187$381K0.0%+3.2%0.879% 5/12/2025Bard Associates Inc.143,221$246K0.1%-7.8%1.351% 2/14/2025Topline Capital Management LLC419,887$617K0.1%N/A3.984% 2/6/2025Bard Associates Inc.155,271$228K0.1%-9.9%1.473% 8/9/2024Dimensional Fund Advisors LP17,631$37K0.0%N/A0.167% 4/26/2024Mesirow Financial Investment Management Inc.15,383$34K0.0%N/A0.146% 2/10/2023Bard Associates Inc.194,789$225K0.1%-22.7%1.887% 11/15/2022Elkhorn Partners Limited Partnership50,341$46K0.0%+48.1%0.488% Get the Latest News and Ratings for NEPH and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Nephros and its competitors with MarketBeat's FREE daily newsletter. 8/11/2022Bard Associates Inc.263,754$404K0.2%+7.0%2.556% 8/1/2022Cowen Prime Advisors LLC42,500$65K0.0%-47.1%0.412% 5/23/2022Cantor Fitzgerald L. P.12,813$56K0.0%N/A0.124% 5/11/2022Bard Associates Inc.246,408$1.08M0.4%+6.0%2.388% 5/10/2022Elkhorn Partners Limited Partnership23,712$104K0.1%+56.0%0.230% 5/2/2022Cowen Prime Advisors LLC80,400$354K0.1%-87.3%0.780% 2/19/2022Wexford Capital LP3,650,529$646.53M27.0%N/A35.674% 2/14/2022Elkhorn Partners Limited Partnership15,200$90K0.1%+78.8%0.149% 2/8/2022Cowen Prime Advisors LLC633,050$3.74M1.3%-4.1%6.186% 2/8/2022Samjo Capital LLC425,000$2.51M1.7%-22.7%4.153% 11/9/2021BlackRock Inc.18,079$158K0.0%-23.0%0.177% 11/2/2021Cowen Prime Advisors LLC660,150$5.79M2.2%+5.4%6.461% 8/17/2021Wexford Capital LP3,631,197$36.85M5.6%+1.9%35.541% 8/13/2021Vanguard Group Inc.99,936$1.01M0.0%+3.9%0.978% 8/12/2021Bard Associates Inc.231,508$2.35M0.8%+5.5%2.266% 8/2/2021Advisor Group Holdings Inc.4,574$46K0.0%+91,380.0%0.046% (Data available from 1/1/2016 forward) NEPH Institutional Ownership - Frequently Asked Questions Who are the largest shareholders of NEPH shares? During the previous two years, the following institutional investors and hedge funds held shares of Nephros shares: Topline Capital Management LLC ($1.95M), Geode Capital Management LLC ($381K), Bard Associates Inc. ($246K), Elkhorn Partners Limited Partnership ($59K), and Dimensional Fund Advisors LP ($37K), Mesirow Financial Investment Management Inc. ($34K).Learn more on Nephros' institutional investors. What percentage of Nephros' stock is owned by institutional investors? 41.10% of Nephros' stock is owned by institutional investors. Learn more on NEPH's institutional investor holdings. Which institutional investors have been buying Nephros' stock? The following institutional investors have purchased Nephros' stock in the last 24 months: Topline Capital Management LLC ($475.25K), Dimensional Fund Advisors LP ($17.63K), Mesirow Financial Investment Management Inc. ($15.38K), and Geode Capital Management LLC ($2.90K). How much institutional buying is happening at Nephros? Institutional investors have bought a total of 478,145 shares in the last 24 months. This purchase volume represents approximately $855.51K in transactions. Which of Nephros' major shareholders have been selling company stock? The following institutional investors have sold Nephros stock in the last 24 months: Bard Associates Inc. ($29.15K), and Elkhorn Partners Limited Partnership ($24.42K). How much institutional selling is happening at Nephros? Institutional investors have sold a total of 53,574 shares in the last 24 months. This volume of shares sold represents approximately $145.76K in transactions. 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