Nephros Inc (NEPH) Institutional Ownership

Ownership Summary

According to SEC filings for the period ending September 2025, Nephros Inc (NASDAQ:NEPH) is held by 23 institutional firms.

• The percentage of Nephros owned by institutions changed from 47.4% in June 2025 to 44.5% in September 2025, marking a slight down trend.
• The company experienced a 3.33% quarterly change in institutional shares held, alongside an increase of 27.78% in total owners annually.
• A review of institutional activity for Nephros shows 7 of 23 filers increasing their positions, while 8 reduced their stake, and 8 remained unchanged.
• Collectively, institutional investors increased their stake in Nephros to 5.00Mn shares as of September 2025, a change that is up by 161.16K shares quarter on quarter and up 715.71K shares year over year.
• WEXFORD CAPITAL LP continues to be the largest institutional holder of Nephros as of September 30, 2025, with a position of 3.62Mn shares, representing 32.20% of the company's outstanding stock.
• Among the most significant buyers of Nephros during September 2025 were Topline Capital Management, LLC (118.85K), RENAISSANCE TECHNOLOGIES LLC (71.60K), GOLDMAN SACHS GROUP INC (18.64K), CITADEL ADVISORS LLC (16.55K), DIMENSIONAL FUND ADVISORS LP (13.60K).
• Leading sellers of Nephros stock in September 2025 included VANGUARD GROUP INC (42.14K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (19.05K), GEODE CAPITAL MANAGEMENT, LLC (17.30K), BARD ASSOCIATES INC (4.00K), UBS Group AG (2.46K).
• The top 10 institutional holders of Nephros for the quarter ending September 2025 included WEXFORD CAPITAL LP (3.62Mn), Topline Capital Management, LLC (596.30K), VANGUARD GROUP INC (281.31K), BARD ASSOCIATES INC (127.12K), RENAISSANCE TECHNOLOGIES LLC (82.50K), GEODE CAPITAL MANAGEMENT, LLC (75.89K), HighTower Advisors, LLC (55.71K), BLAIR WILLIAM & CO/IL (36.25K), ESSEX INVESTMENT MANAGEMENT CO LLC (24.82K), GOLDMAN SACHS GROUP INC (18.64K).