NEPHROS INC (NEPH) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $16.00M 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 $10.73M in its March 31, 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 $11.52M, representing an estimated gain of +7.38% 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
27
Total Reported Value
$16.00M
Largest Holder
Wexford Capital Lp
Largest Position
$10.73M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
37
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Wexford Capital Lp | 1.77% | 3,600,552 | $10,729,646 | $11,521,766 | +$792,120 | +7.38% | |
| Topline Capital Management, Llc | 0.29% | 581,967 | $1,734,262 | $1,862,294 | +$128,032 | +7.38% | |
| Vanguard Capital Management Llc | 0.00% | 198,643 | $591,956 | $635,658 | +$43,702 | +7.38% | |
| Cornerstone Capital, Inc. | 0.04% | 128,700 | $383,526 | $411,840 | +$28,314 | +7.38% | |
| Bard Associates Inc | 0.09% | 121,202 | $361,182 | $387,846 | +$26,664 | +7.38% | |
| Mesirow Financial Investment Management, Inc. | 0.01% | 120,000 | $357,600 | $384,000 | +$26,400 | +7.38% | |
| Morgan Stanley | 0.00% | 110,915 | $330,527 | $354,928 | +$24,401 | +7.38% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 99,400 | $296,212 | $318,080 | +$21,868 | +7.38% |
| Geode Capital Management, Llc | 0.00% | 72,925 | $217,376 | $233,360 | +$15,984 | +7.35% | |
| Hightower Advisors, Llc | 0.00% | 59,710 | $177,936 | $191,072 | +$13,136 | +7.38% | |
| Essex Investment Management Co Llc | 0.02% | 38,984 | $116,172 | $124,749 | +$8,577 | +7.38% | |
| Vanguard Fiduciary Trust Co | 0.00% | 36,901 | $109,965 | $118,083 | +$8,118 | +7.38% | |
| Blair William & Co/Il | 0.00% | 36,249 | $108,022 | $115,997 | +$7,975 | +7.38% | |
| De Lisle Partners Llp | 0.01% | 25,000 | $74,500 | $80,000 | +$5,500 | +7.38% | |
| Citadel Advisors Llc | 0.00% | 20,888 | $62,246 | $66,842 | +$4,596 | +7.38% | |
| Dimensional Fund Advisors Lp | 0.00% | 20,745 | $61,820 | $66,384 | +$4,564 | +7.38% | |
| Navellier & Associates Inc | 0.01% | 19,126 | $56,995 | $61,203 | +$4,208 | +7.38% | |
| State Street Corp | 0.00% | 15,698 | $46,780 | $50,234 | +$3,454 | +7.38% | |
| Goldman Sachs Group Inc | 0.00% | 14,163 | $42,206 | $45,322 | +$3,116 | +7.38% | |
| Prelude Capital Management, Llc | 0.00% | 13,680 | $40,766 | $43,776 | +$3,010 | +7.38% | |
| Elkhorn Partners Limited Partnership | 0.02% | 12,000 | $35,760 | $38,400 | +$2,640 | +7.38% | |
| Cannell & Spears Llc | 0.00% | 11,000 | $32,780 | $35,200 | +$2,420 | +7.38% | |
| Northern Trust Corp | 0.00% | 10,828 | $32,267 | $34,650 | +$2,383 | +7.38% | |
| Royal Bank Of Canada | 0.00% | 747 | $2,000 | $2,390 | +$390 | +19.52% | |
| Osaic Holdings, Inc. | 0.00% | 175 | $521 | $560 | +$39 | +7.49% | |
| Harbour Investments, Inc. | 0.00% | 50 | $149 | $160 | +$11 | +7.38% | |
| Jones Financial Companies Lllp | 0.00% | 31 | $90 | $99 | +$9 | +10.22% |
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.