NEPH Institutional Ownership & Shareholders
NEPHROS INC (NEPH) is currently held by 31 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $18.76M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Wexford Capital Lp is currently the largest disclosed institutional shareholder of NEPH tracked by InsiderSet, reporting ownership valued at approximately $12.85M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $11.41M, representing an estimated loss of -11.20% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 95% of the total disclosed NEPH value among the investors covered in this analysis. Major shareholders include Wexford Capital Lp, Topline Capital Management, Llc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in NEPHROS INC (NEPH).
This page ranks the largest institutional NEPH shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
31
Total Reported Value
$18.76M
Largest Holder
Wexford Capital Lp
Largest Position
$12.85M
Insider Transactions (90d)
4
Latest Filing Quarter
Q2 2026
New Institutional Positions
43
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Wexford Capital Lp | 1.76% | 3,600,552 | $12,853,971 | $11,413,750 | -$1,440,221 | -11.20% | |
| Topline Capital Management, Llc | 0.50% | 535,698 | $1,912,442 | $1,698,163 | -$214,279 | -11.20% | |
| Vanguard Capital Management Llc | 0.00% | 198,643 | $709,156 | $629,698 | -$79,458 | -11.20% | |
| Morgan Stanley | 0.00% | 128,915 | $460,227 | $408,661 | -$51,566 | -11.20% | |
| Cornerstone Capital, Inc. | 0.04% | 128,700 | $459,459 | $407,979 | -$51,480 | -11.20% | |
| Bard Associates Inc | 0.09% | 118,003 | $421,271 | $374,070 | -$47,201 | -11.20% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 77,504 | $276,689 | $245,688 | -$31,001 | -11.20% |
| Geode Capital Management, Llc | 0.00% | 70,263 | $250,916 | $222,734 | -$28,182 | -11.23% | |
| Mesirow Financial Investment Management, Inc. | 0.00% | 60,000 | $214,200 | $190,200 | -$24,000 | -11.20% | |
| Navellier & Associates Inc | 0.02% | 53,479 | $190,920 | $169,528 | -$21,392 | -11.20% | |
| Essex Investment Management Co Llc | 0.02% | 38,927 | $144,419 | $123,399 | -$21,020 | -14.56% | |
| Vanguard Fiduciary Trust Co | 0.00% | 36,901 | $131,737 | $116,976 | -$14,761 | -11.20% | |
| Blair William & Co/Il | 0.00% | 36,249 | $129,409 | $114,909 | -$14,500 | -11.20% | |
| Citadel Advisors Llc | 0.00% | 29,044 | $103,687 | $92,069 | -$11,618 | -11.20% | |
| Dimensional Fund Advisors Lp | 0.00% | 22,164 | $79,126 | $70,260 | -$8,866 | -11.21% | |
| Blackrock, Inc. | 0.00% | 18,822 | $67,195 | $59,666 | -$7,529 | -11.21% | |
| De Lisle Partners Llp | 0.01% | 17,400 | $62,118 | $55,158 | -$6,960 | -11.20% | |
| Northern Trust Corp | 0.00% | 16,706 | $59,640 | $52,958 | -$6,682 | -11.20% | |
| State Street Corp | 0.00% | 15,698 | $56,042 | $49,763 | -$6,279 | -11.20% | |
| Goldman Sachs Group Inc | 0.00% | 12,836 | $45,825 | $40,690 | -$5,135 | -11.21% | |
| Mercer Global Advisors Inc | 0.00% | 12,500 | $44,625 | $39,625 | -$5,000 | -11.20% | |
| Cannell & Spears Llc | 0.00% | 11,000 | $39,270 | $34,870 | -$4,400 | -11.20% | |
| Elkhorn Partners Limited Partnership | 0.03% | 11,000 | $39,270 | $34,870 | -$4,400 | -11.20% | |
| Royal Bank Of Canada | 0.00% | 827 | $3,000 | $2,622 | -$378 | -12.61% | |
| Ubs Group Ag | 0.00% | 831 | $2,967 | $2,634 | -$333 | -11.21% | |
| Jones Financial Companies Lllp | 0.00% | 227 | $819 | $720 | -$99 | -12.14% | |
| Osaic Holdings, Inc. | 0.00% | 175 | $624 | $555 | -$69 | -11.10% | |
| Sbi Securities Co., Ltd. | 0.00% | 154 | $571 | $488 | -$83 | -14.50% | |
| Harbour Investments, Inc. | 0.00% | 50 | $179 | $159 | -$21 | -11.45% | |
| Barclays Plc | 0.00% | 27 | $96 | $86 | -$10 | -10.84% | |
| Fmr Llc | 0.00% | 6 | $22 | $19 | -$3 | -13.55% |
Frequently asked questions about NEPH
Who are the largest institutional holders of NEPH?
The largest institutional holders of NEPH reported in the latest SEC Form 13F filings include Wexford Capital Lp, Topline Capital Management, Llc, Vanguard Capital Management Llc, Morgan Stanley, and Cornerstone Capital, Inc.. InsiderSet ranks institutional holders by their latest reported NEPH position.
What is NEPH institutional ownership?
This page tracks NEPH positions reported by institutional investment managers through SEC Form 13F. NEPHROS INC (NEPH) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own NEPH?
InsiderSet currently tracks 31 institutional managers reporting NEPH holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of NEPH shareholders.
How much NEPH stock do institutions own?
Institutional investment managers disclosed approximately $18.76M in NEPH holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was NEPH institutional ownership last updated?
The latest NEPH institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional NEPH holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its NEPH position after the reporting date.
Are institutions buying or selling NEPH?
Institutional buying and selling can be analyzed by comparing NEPH positions across consecutive 13F reporting periods. InsiderSet's NEPH Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View NEPH ownership changes.
How has NEPH institutional ownership changed over time?
InsiderSet tracks NEPH institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.