NEPHROS INC NEPH
COM · Common Stock · CUSIP 640671400
- SectorHealth care
- IndustrySurgical & Medical Instruments & Apparatus
- HeadquartersSouth Orange, NJ
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 10.9m as of 2026-08-07, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $3.57.
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 19 |
| Q4 2022 | 20 |
| Q1 2023 | 19 |
| Q2 2023 | 17 |
| Q3 2023 | 15 |
| Q4 2023 | 19 |
| Q1 2024 | 19 |
| Q2 2024 | 20 |
| Q3 2024 | 18 |
| Q4 2024 | 19 |
| Q1 2025 | 19 |
| Q2 2025 | 22 |
| Q3 2025 | 24 |
| Q4 2025 | 35 |
| Q1 2026 | 27 |
| Q2 2026 | 33 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 5 | 8 |
| Q4 2024 | 4 | 9 |
| Q1 2025 | 6 | 6 |
| Q2 2025 | 12 | 6 |
| Q3 2025 | 8 | 10 |
| Q4 2025 | 25 | 8 |
| Q1 2026 | 7 | 19 |
| Q2 2026 | 14 | 10 |
Biggest buyers
| NAVELLIER & ASSOCIATES INC | Added | +34.4k |
| BlackRock, Inc. | New | +18.8k |
| MORGAN STANLEY | Added | +18.0k |
| MERCER GLOBAL ADVISORS INC /ADV | New | +12.5k |
| CITADEL ADVISORS LLC | Added | +8.2k |
| NORTHERN TRUST CORP | Added | +5.9k |
| DIMENSIONAL FUND ADVISORS LP | Added | +1.4k |
| UBS Group AG | New | +831 |
| JONES FINANCIAL COMPANIES LLLP | Added | +196 |
| SBI Securities Co., Ltd. | New | +150 |
Biggest sellers
| Mesirow Financial Investment Management, Inc. | Reduced | -60.0k |
| Topline Capital Management, LLC | Reduced | -46.3k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -21.9k |
| PRELUDE CAPITAL MANAGEMENT, LLC | Sold out | -13.7k |
| De Lisle Partners LLP | Reduced | -7.6k |
| BARD ASSOCIATES INC | Reduced | -3.2k |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | -2.7k |
| GOLDMAN SACHS GROUP INC | Reduced | -1.3k |
| ELKHORN PARTNERS LIMITED PARTNERSHIP | Reduced | -1.0k |
| ESSEX INVESTMENT MANAGEMENT CO LLC | Reduced | -57 |
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| DAVIDSON CHARLES E 13G · passive investor new · filed 2026-09-16 | 5.7% |
| Topline Capital Management, LLC 13G · institution new · filed 2025-11-14 | 5.6% |
Fell to 5% or below in the last year: WEXFORD CAPITAL LP (2.1%, 2026-09-16)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| WEXFORD CAPITAL LP 1.76% of their portfolio | 3.6m $12.9m | Unchanged |
| Topline Capital Management, LLC 0.50% of their portfolio | 535.7k $1.9m | Reduced -46.3k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 198.6k $709.2k | Unchanged |
| MORGAN STANLEY 0.00% of their portfolio | 128.9k $460.2k | Added +18.0k |
| Cornerstone Capital, Inc. 0.04% of their portfolio | 128.7k $459.5k | Unchanged |
| BARD ASSOCIATES INC 0.09% of their portfolio | 118.0k $421.3k | Reduced -3.2k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 77.5k $276.7k | Reduced -21.9k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 70.3k $250.9k | Reduced -2.7k |
| Mesirow Financial Investment Management, Inc. 0.00% of their portfolio | 60.0k $214.2k | Reduced -60.0k |
| HighTower Advisors, LLC 0.00% of their portfolio | 59.7k $213.2k | Unchanged |
| NAVELLIER & ASSOCIATES INC 0.02% of their portfolio | 53.5k $190.9k | Added +34.4k |
| ESSEX INVESTMENT MANAGEMENT CO LLC 0.02% of their portfolio | 38.9k $139.0k | Reduced -57 |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 36.9k $131.7k | Unchanged |
| BLAIR WILLIAM & CO/IL 0.00% of their portfolio | 36.2k $129.4k | Unchanged |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 29.0k $103.7k | Added +8.2k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 22.2k $79.1k | Added +1.4k |
| BlackRock, Inc. 0.00% of their portfolio | 18.8k $67.2k | New |
| De Lisle Partners LLP 0.01% of their portfolio | 17.4k $62.1k | Reduced -7.6k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 16.7k $59.6k | Added +5.9k |
| STATE STREET CORP 0.00% of their portfolio | 15.7k $56.0k | Unchanged |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 12.8k $45.8k | Reduced -1.3k |
| MERCER GLOBAL ADVISORS INC /ADV 0.00% of their portfolio | 12.5k $44.6k | New |
| ELKHORN PARTNERS LIMITED PARTNERSHIP 0.03% of their portfolio | 11.0k $39.3k | Reduced -1.0k |
| Cannell & Spears LLC 0.00% of their portfolio | 11.0k $39.3k | Unchanged |
| UBS Group AG 0.00% of their portfolio | 831 $3.0k | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 827 $3.0k | Added +80 |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 227 $819 | Added +196 |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 175 $624 | Unchanged |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 150 $536 | New |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO 0.00% of their portfolio | 133 $475 | New |
| HARBOUR INVESTMENTS, INC. 0.00% of their portfolio | 50 $179 | Unchanged |
| BARCLAYS PLC 0.00% of their portfolio | 27 $96 | New |
| FMR LLC 0.00% of their portfolio | 6 $22 | New |