NEPHROS INC (NEPH) Institutional Shareholders
NEPHROS INC (NEPH) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $18.75M in NEPH holdings during the latest filing period.
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 $15.52M, representing an estimated gain of +20.73% 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
$18.75M
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 | $15,518,379 | +$2,664,408 | +20.73% | |
| Topline Capital Management, Llc | 0.50% | 535,698 | $1,912,442 | $2,308,858 | +$396,416 | +20.73% | |
| Vanguard Capital Management Llc | 0.00% | 198,643 | $709,156 | $856,151 | +$146,995 | +20.73% | |
| Morgan Stanley | 0.00% | 128,915 | $460,227 | $555,624 | +$95,397 | +20.73% | |
| Cornerstone Capital, Inc. | 0.04% | 128,700 | $459,459 | $554,697 | +$95,238 | +20.73% | |
| Bard Associates Inc | 0.09% | 118,003 | $421,271 | $508,593 | +$87,322 | +20.73% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 77,504 | $276,689 | $334,042 | +$57,353 | +20.73% |
| Geode Capital Management, Llc | 0.00% | 70,263 | $250,916 | $302,834 | +$51,918 | +20.69% | |
| Mesirow Financial Investment Management, Inc. | 0.00% | 60,000 | $214,200 | $258,600 | +$44,400 | +20.73% | |
| Navellier & Associates Inc | 0.02% | 53,479 | $190,920 | $230,494 | +$39,574 | +20.73% | |
| Essex Investment Management Co Llc | 0.02% | 38,927 | $138,969 | $167,775 | +$28,806 | +20.73% | |
| Vanguard Fiduciary Trust Co | 0.00% | 36,901 | $131,737 | $159,043 | +$27,306 | +20.73% | |
| Blair William & Co/Il | 0.00% | 36,249 | $129,409 | $156,233 | +$26,824 | +20.73% | |
| Citadel Advisors Llc | 0.00% | 29,044 | $103,687 | $125,180 | +$21,493 | +20.73% | |
| Dimensional Fund Advisors Lp | 0.00% | 22,164 | $79,126 | $95,527 | +$16,401 | +20.73% | |
| Blackrock, Inc. | 0.00% | 18,822 | $67,195 | $81,123 | +$13,928 | +20.73% | |
| De Lisle Partners Llp | 0.01% | 17,400 | $62,118 | $74,994 | +$12,876 | +20.73% | |
| Northern Trust Corp | 0.00% | 16,706 | $59,640 | $72,003 | +$12,363 | +20.73% | |
| State Street Corp | 0.00% | 15,698 | $56,042 | $67,658 | +$11,616 | +20.73% | |
| Goldman Sachs Group Inc | 0.00% | 12,836 | $45,825 | $55,323 | +$9,498 | +20.73% | |
| Mercer Global Advisors Inc | 0.00% | 12,500 | $44,625 | $53,875 | +$9,250 | +20.73% | |
| Cannell & Spears Llc | 0.00% | 11,000 | $39,270 | $47,410 | +$8,140 | +20.73% | |
| Elkhorn Partners Limited Partnership | 0.03% | 11,000 | $39,270 | $47,410 | +$8,140 | +20.73% | |
| Royal Bank Of Canada | 0.00% | 827 | $3,000 | $3,564 | +$564 | +18.81% | |
| Ubs Group Ag | 0.00% | 831 | $2,967 | $3,582 | +$615 | +20.71% | |
| Jones Financial Companies Lllp | 0.00% | 227 | $819 | $978 | +$159 | +19.46% | |
| Osaic Holdings, Inc. | 0.00% | 175 | $624 | $754 | +$130 | +20.87% | |
| Sbi Securities Co., Ltd. | 0.00% | 150 | $536 | $646 | +$110 | +20.62% | |
| Harbour Investments, Inc. | 0.00% | 50 | $179 | $215 | +$36 | +20.39% | |
| Barclays Plc | 0.00% | 27 | $96 | $116 | +$20 | +21.22% | |
| Fmr Llc | 0.00% | 6 | $22 | $26 | +$4 | +17.55% |
Frequently asked questions about NEPH
Who owns the most NEPH stock?
The largest holders of NEPH are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for NEPHROS INC (NEPH).
Is NEPH widely held by superinvestors?
Many widely followed stocks like NEPH appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly NEPH is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.