NephrosNEPH
13F holders, Q1 2026 (March 31)At the end of Q1 2026, 27 institutions reported holding Nephros Inc. (NEPH) in their 13F filings, down 8 from Q4 2025. 1 opened new positions and 10 sold out. The largest holders were Wexford Capital LP ($10.7M), Topline Capital Management, LLC ($1.7M) and Vanguard Capital Management LLC ($592K). 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 Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 1 | $384K |
| Exits | 10 | $813K |
All 13F filers, Q4 2025 → Q1 2026: 303,987 shares bought and 237,888 shares sold, net +66,099 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 27 holders
| Wexford Capital LP | 1.77% | Reduce -0.5% | 3,600,552 | $10.7M |
| Topline Capital Management, LLC | 0.29% | Reduce -5.3% | 581,967 | $1.7M |
| Vanguard Capital Management LLC | 0.00% | — | 198,643 | $592K |
| Cornerstone Capital, Inc. | 0.04% | New | 128,700 | $384K |
| Bard Associates Inc. | 0.09% | Reduce -0.3% | 121,202 | $361K |
| Mesirow Financial Investment Management, Inc. | 0.01% | Add +140.0% | 120,000 | $358K |
| Morgan Stanley | 0.00% | Add +517.6% | 110,915 | $331K |
| Renaissance Technologies | 0.00% | Reduce -4.2% | 99,400 | $296K |
| Geode Capital Management, LLC | 0.00% | Reduce -2.3% | 72,925 | $217K |
| HighTower Advisors, LLC | 0.00% | No change | 59,710 | $178K |
| Essex Investment Management Co. LLC | 0.02% | No change | 38,984 | $116K |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 36,901 | $110K |
| Blair William & Co. | 0.00% | No change | 36,249 | $108K |
| De Lisle Partners LLP | 0.01% | No change | 25,000 | $75K |
| Citadel Advisors | 0.00% | Add +0.9% | 20,888 | $62K |
| Dimensional Fund Advisors LP | 0.00% | Add +52.5% | 20,745 | $62K |
| Navellier & Associates Inc. | 0.01% | Reduce -29.6% | 19,126 | $57K |
| State Street Corp. | 0.00% | No change | 15,698 | $47K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -25.4% | 14,163 | $42K |
| Prelude Capital Management, LLC | 0.00% | Reduce -9.9% | 13,680 | $41K |
| Elkhorn Partners Limited Partnership | 0.02% | Add +71.4% | 12,000 | $36K |
| Cannell & Spears LLC | 0.00% | No change | 11,000 | $33K |
| Northern Trust Corp. | 0.00% | No change | 10,828 | $32K |
| Royal Bank of Canada | 0.00% | Add +1.2% | 747 | $2K |
| Osaic Holdings, Inc. | 0.00% | Reduce -89.2% | 175 | $521 |
| Harbour Investments, Inc. | 0.00% | No change | 50 | $149 |
| Jones Financial Companies LLLP | 0.00% | No change | 31 | $90 |
"% of holder's portfolio" is NEPH's weight in each manager's 13F, not the share of Nephros Inc. the manager owns.