Nephros
NEPH · NASDAQ
$3.52−$0.16 (−4.35%)TodayMarket closed ·
Prev close $3.68
Who owns NEPH
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 53.0% of NEPH’s shares.
- Wexford Capital LP33.2%
- Topline Capital Management, LLC4.9%
- Pessin (Sandra F)3.4%
- Pessin (Norman H)3.2%
- Next 6 largest institutions8.4%
- All other shareholders47.0%
| Holder | Shares | % of shares |
|---|---|---|
| Wexford Capital LP | 3.60M | 33.15% |
| Topline Capital Management, LLC | 535.70K | 4.93% |
| Pessin (Sandra F) | 369.71K | 3.40% |
| Pessin (Norman H) | 344.13K | 3.17% |
| Vanguard Capital Management, LLC | 198.64K | 1.83% |
| Banks (Robert R Jr.) | 190.00K | 1.75% |
| Amron (Arthur H) | 140.87K | 1.30% |
| Morgan Stanley Smith Barney LLC | 128.91K | 1.19% |
| Cornerstone Capital, Inc. | 128.70K | 1.19% |
| Spandow (Oliver J) | 122.88K | 1.13% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 130.90K | 1.21% |
| Vanguard Extended Market Index Fund | 67.74K | 0.62% |
| Fidelity Extended Market Index Fund | 32.31K | 0.30% |
| iShares Micro-Cap ETF | 17.98K | 0.17% |
| Fidelity Total Market Index Fund | 11.57K | 0.11% |
Insider trades
Form 4 filings by officers, directors and large holders
Insiders made no open-market buys or sales of NEPH in the last 6 months.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Amron Arthur H | Other | 22.71K | $89.70K |
| Amron Arthur H | Other | 2.84K | — |
| Amron Arthur H | Other | 17.75K | — |
| WEXFORD CAPITAL LP | Other | 22.71K | $89.70K |
| WEXFORD CAPITAL LP | Other | 3.36M | — |
| WEXFORD CAPITAL LP | Option exercise | 3.77K | — |
| WEXFORD CAPITAL LP | Option exercise | 812 | $2.92K |
| Amron Arthur H | Award | 2.42K | — |
| Amron Arthur H | Award | 3.57K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 25.30K
- Days to cover
- 1.38
- % of shares outstanding
- 0.23%
- Average daily volume
- 18.27K
- Change since last report
- −45.5%
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