NEPH
Nephros Inc
$3.40
+0.03 (+0.89%)
At close · Jul 2
Market Cap
$36.91M
Shares
10,856,546
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 27
Total Value: $16,003,421
Total Shares: 5,370,279
Institutional Ownership Trend
25 quarters
Holder Concentration
Across 27 13F filers · Δ vs Dec 31, 2025Top Holder
67.0%
−1.2 pts
Top 5
86.2%
−2.2 pts
Top 10
94.9%
+0.9 pts
HHI
4,655
Highly concentrated−170
Quarterly Activity
vs Dec 31, 2025
New
3
Increased
6
Decreased
9
Sold Out
11
Unchanged
9
Holder count:
-8
Institutional value:
-38.2%
Shares held:
+1.3%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega MORGAN STANLEY | +92,956 | 110,915 | |
| Mid Mesirow Financial Investment Management, Inc. | +70,000 | 120,000 | |
| Mega DIMENSIONAL FUND ADVISORS LP | +7,144 | 20,745 | |
| Small ELKHORN PARTNERS LIMITED PARTNERSHIP | +5,000 | 12,000 | |
| Mega CITADEL ADVISORS LLC | +178 | 20,888 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Small Topline Capital Management, LLC | −32,335 | 581,967 | |
| Small WEXFORD CAPITAL LP | −16,481 | 3,600,552 | |
| Small NAVELLIER & ASSOCIATES INC | −8,049 | 19,126 | |
| Mega GOLDMAN SACHS GROUP INC | −4,817 | 14,163 | |
| Large RENAISSANCE TECHNOLOGIES LLC | −4,372 | 99,400 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 198,643 | $591,956 | |
| Small Cornerstone Capital, Inc. | 128,700 | $383,526 | |
| Mega VANGUARD FIDUCIARY TRUST CO | 36,901 | $109,964 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD GROUP INC | 233,644 | $1,140,181 | |
| Large Cambridge Investment Research Advisors, Inc. | 69,149 | $337,447 | |
| Mid Quadrature Capital Ltd | 23,004 | $112,259 | |
| Large MARSHALL WACE, LLP | 21,983 | $107,277 | |
| Mid XTX Topco Ltd | 21,617 | $105,490 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Small WEXFORD CAPITAL LP | $10,729,644 | 67.05% | 3,600,552 | Shares | Sole | 2026-05-15 | ||||
| Small Topline Capital Management, LLC | $1,734,261 | 10.84% | 581,967 | Shares | Sole | 2026-05-15 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $591,956 | 3.70% | 198,643 | Shares | Defined | 2026-05-15 | ||||
| Small Cornerstone Capital, Inc. | $383,526 | 2.40% | 128,700 | Shares | Sole | 2026-05-12 | ||||
| Small BARD ASSOCIATES INC | $361,181 | 2.26% | 121,202 | Shares | Sole | 2026-05-08 | ||||
| Mid Mesirow Financial Investment Management, Inc. | $357,600 | 2.23% | 120,000 | Shares | Sole | 2026-04-21 | ||||
| Mega MORGAN STANLEY | $330,526 | 2.07% | 110,915 | Shares | Defined | 2026-05-15 | ||||
| Large RENAISSANCE TECHNOLOGIES LLC | $296,212 | 1.85% | 99,400 | Shares | Sole | 2026-05-14 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $217,316 | 1.36% | 72,925 | Shares | Defined | 2026-05-15 | ||||
| Large HighTower Advisors, LLC | $177,935 | 1.11% | 59,710 | Shares | Sole | 2026-05-05 | ||||
| Small ESSEX INVESTMENT MANAGEMENT CO LLC | $116,172 | 0.73% | 38,984 | Shares | Sole | 2026-05-11 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $109,964 | 0.69% | 36,901 | Shares | Defined | 2026-05-08 | ||||
| Large BLAIR WILLIAM & CO/IL | $108,022 | 0.67% | 36,249 | Shares | Sole | 2026-05-08 | ||||
| Small De Lisle Partners LLP | $74,500 | 0.47% | 25,000 | Shares | Sole | 2026-05-13 | ||||
| Mega CITADEL ADVISORS LLC | $62,246 | 0.39% | 20,888 | Shares | Defined | 2026-05-15 | ||||
| Mega DIMENSIONAL FUND ADVISORS LP | $61,819 | 0.39% | 20,745 | Shares | Sole | 2026-05-07 | ||||
| Small NAVELLIER & ASSOCIATES INC | $56,995 | 0.36% | 19,126 | Shares | Sole | 2026-05-07 | ||||
| Mega STATE STREET CORP | $46,780 | 0.29% | 15,698 | Shares | Defined | 2026-05-15 | ||||
| Mega GOLDMAN SACHS GROUP INC | $42,205 | 0.26% | 14,163 | Shares | Defined | 2026-05-15 | ||||
| Mid PRELUDE CAPITAL MANAGEMENT, LLC | $40,766 | 0.25% | 13,680 | Shares | Other | 2026-05-15 | ||||
| Small ELKHORN PARTNERS LIMITED PARTNERSHIP | $35,760 | 0.22% | 12,000 | Shares | Sole | 2026-05-14 | ||||
| Mid Cannell & Spears LLC | $32,780 | 0.20% | 11,000 | Shares | Sole | 2026-05-15 | ||||
| Mega NORTHERN TRUST CORP Bank | $32,267 | 0.20% | 10,828 | Shares | Defined | 2026-05-14 | ||||
| Mega ROYAL BANK OF CANADA Bank | $2,226 | 0.01% | 747 | Shares | Defined | 2026-05-15 | ||||
| Large OSAIC HOLDINGS, INC. | $521 | 0.00% | 175 | Shares | Defined | 2026-05-15 | ||||
| Mid HARBOUR INVESTMENTS, INC. | $149 | 0.00% | 50 | Shares | Sole | 2026-05-15 | ||||
| Large JONES FINANCIAL COMPANIES LLLP | $92 | 0.00% | 31 | Shares | Sole | 2026-05-15 | ||||
| No holders match your search. | ||||||||||