NEPH Nephros, Inc.
Nephros, Inc. (NEPH) Institutional Ownership
What the institutions did with NEPH last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| WEXFORD CAPITAL LP | 3.6M | 67.8% |
| Topline Capital Management, LLC | 535.7K | 10.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 198.6K | 3.7% |
| MORGAN STANLEY | 128.9K | 2.4% |
| Cornerstone Capital, Inc. | 128.7K | 2.4% |
| BARD ASSOCIATES INC | 118.0K | 2.2% |
| RENAISSANCE TECHNOLOGIES LLC | 77.5K | 1.5% |
| GEODE CAPITAL MANAGEMENT, LLC | 70.3K | 1.3% |
| Mesirow Financial Investment Management, Inc. | 60.0K | 1.1% |
| HighTower Advisors, LLC | 59.7K | 1.1% |
| NAVELLIER & ASSOCIATES INC | 53.5K | 1.0% |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 38.9K | 0.7% |
| VANGUARD FIDUCIARY TRUST CO | 36.9K | 0.7% |
| BLAIR WILLIAM & CO/IL | 36.2K | 0.7% |
| CITADEL ADVISORS LLC | 29.0K | 0.5% |
| DIMENSIONAL FUND ADVISORS LP | 22.2K | 0.4% |
| BlackRock, Inc. | 18.8K | 0.4% |
| De Lisle Partners LLP | 17.4K | 0.3% |
| NORTHERN TRUST CORP | 16.7K | 0.3% |
| STATE STREET CORP | 15.7K | 0.3% |
| GOLDMAN SACHS GROUP INC | 12.8K | 0.2% |
| MERCER GLOBAL ADVISORS INC /ADV | 12.5K | 0.2% |
| ELKHORN PARTNERS LIMITED PARTNERSHIP | 11.0K | 0.2% |
| Cannell & Spears LLC | 11.0K | 0.2% |
| UBS Group AG | 831 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Mesirow Financial Investment Management, Inc. | Reduced | 120.0K | 60.0K | -60.0K |
| Topline Capital Management, LLC | Reduced | 582.0K | 535.7K | -46.3K |
| NAVELLIER & ASSOCIATES INC | Increased | 19.1K | 53.5K | +34.4K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 99.4K | 77.5K | -21.9K |
| BlackRock, Inc. | New | 0 | 18.8K | +18.8K |
| MORGAN STANLEY | Increased | 110.9K | 128.9K | +18.0K |
| PRELUDE CAPITAL MANAGEMENT, LLC | Sold Out | 13.7K | 0 | -13.7K |
| MERCER GLOBAL ADVISORS INC /ADV | New | 0 | 12.5K | +12.5K |
| CITADEL ADVISORS LLC | Increased | 20.9K | 29.0K | +8.2K |
| De Lisle Partners LLP | Reduced | 25.0K | 17.4K | -7.6K |
| NORTHERN TRUST CORP | Increased | 10.8K | 16.7K | +5.9K |
| BARD ASSOCIATES INC | Reduced | 121.2K | 118.0K | -3.2K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 72.9K | 70.3K | -2.7K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 20.7K | 22.2K | +1.4K |
| GOLDMAN SACHS GROUP INC | Reduced | 14.2K | 12.8K | -1.3K |
| ELKHORN PARTNERS LIMITED PARTNERSHIP | Reduced | 12.0K | 11.0K | -1.0K |
| UBS Group AG | New | 0 | 831 | +831 |
| JONES FINANCIAL COMPANIES LLLP | Increased | 31 | 227 | +196 |
| SBI Securities Co., Ltd. | New | 0 | 150 | +150 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | New | 0 | 133 | +133 |
| ROYAL BANK OF CANADA | Increased | 747 | 827 | +80 |
| ESSEX INVESTMENT MANAGEMENT CO LLC | Reduced | 39.0K | 38.9K | -57 |
| BARCLAYS PLC | New | 0 | 27 | +27 |
| FMR LLC | New | 0 | 6 | +6 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.