NephrosNEPH
13F holders, Q4 2025 (December 31)At the end of Q4 2025, 35 institutions reported holding Nephros Inc. (NEPH) in their 13F filings, up 11 from Q3 2025. 14 opened new positions and 3 sold out. The largest holders were Wexford Capital LP ($17.7M), Topline Capital Management, LLC ($3.0M) and Vanguard Group Inc. ($1.1M). 2 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Nephros Inc.
- CUSIP
- 640671400
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 14 | $1.1M |
| Exits | 3 | $50K |
All 13F filers, Q3 2025 → Q4 2025: 357,737 shares bought and 70,491 shares sold, net +287,246 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 35 holders
| Wexford Capital LP | 4.54% | No change | 3,617,033 | $17.7M |
| Topline Capital Management, LLC | 0.27% | Add +3.0% | 614,302 | $3.0M |
| Vanguard Group Inc. | 0.00% | Reduce -16.9% | 233,644 | $1.1M |
| Bard Associates Inc. | 0.15% | Reduce -4.3% | 121,619 | $594K |
| Renaissance Technologies | 0.00% | Add +25.8% | 103,772 | $506K |
| Geode Capital Management, LLC | 0.00% | Reduce -1.7% | 74,628 | $364K |
| Cambridge Investment Research Advisors, Inc. | 0.00% | New | 69,149 | $337K |
| HighTower Advisors, LLC | 0.00% | Add +7.2% | 59,710 | $291K |
| Mesirow Financial Investment Management, Inc. | 0.01% | Add +262.3% | 50,000 | $244K |
| Essex Investment Management Co. LLC | 0.03% | Add +57.0% | 38,984 | $190K |
| Blair William & Co. | 0.00% | No change | 36,249 | $177K |
| Navellier & Associates Inc. | 0.01% | New | 27,175 | $133K |
| De Lisle Partners LLP | 0.02% | New | 25,000 | $122K |
| Quadrature Capital Ltd | 0.00% | New | 23,004 | $112K |
| Marshall Wace, LLP | 0.00% | New | 21,983 | $107K |
| XTX Topco Ltd | 0.00% | Add +48.5% | 21,617 | $105K |
| Citadel Advisors | 0.00% | Add +25.2% | 20,710 | $101K |
| Goldman Sachs Group Inc. | 0.00% | Add +1.8% | 18,980 | $93K |
| Morgan Stanley | 0.00% | Add +837.8% | 17,959 | $88K |
| State Street Corp. | 0.00% | No change | 15,698 | $77K |
| Prelude Capital Management, LLC | 0.01% | New | 15,180 | $74K |
| Dimensional Fund Advisors LP | 0.00% | No change | 13,601 | $66K |
| Heron Bay Capital Management | 0.01% | New | 13,471 | $66K |
| Cannell & Spears LLC | 0.00% | New | 11,000 | $54K |
| Centiva Capital, LP | 0.00% | New | 10,835 | $53K |
| Northern Trust Corp. | 0.00% | New | 10,828 | $53K |
| Elkhorn Partners Limited Partnership | 0.02% | Reduce -44.0% | 7,000 | $34K |
| Kestra Advisory Services, LLC | 0.00% | New | 6,015 | $29K |
| Osaic Holdings, Inc. | 0.00% | Add +828.6% | 1,625 | $8K |
| Royal Bank of Canada | 0.00% | Add +36800.0% | 738 | $4K |
| SageView Advisory Group, LLC | 0.00% | New | 590 | $3K |
| Bank of America Corp. | 0.00% | Reduce -20.6% | 73 | $356 |
| Harbour Investments, Inc. | 0.00% | New | 50 | $244 |
| Jones Financial Companies LLLP | 0.00% | No change | 31 | $151 |
| NewEdge Advisors, LLC | 0.00% | New | 27 | $132 |
"% of holder's portfolio" is NEPH's weight in each manager's 13F, not the share of Nephros Inc. the manager owns.