New Positions
14 managers initiated
Top five by reported value
- NAVELLIER & ASSOCIATES INC$132.6K
- De Lisle Partners LLP$122.0K
- Quadrature Capital Ltd$112.3K
- MARSHALL WACE, LLP$107.3K
- PRELUDE CAPITAL MANAGEMENT, LLC$74.1K
Nephros Inc NASDAQ NMS - GLOBAL MARKET:NEPH
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
14 new11 added10 reduced3 exited
Total Institutional Holders
35
as of 2025-12-31
Top Holder
WEXFORD CAPITAL LP
$17.7M
Largest QoQ Increase
Cambridge Investment Research Advisors, Inc.
+69,149 sh
Largest QoQ Decrease
VANGUARD GROUP INC
-47,662 sh
New Positions(14)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| NAVELLIER & ASSOCIATES INC | 27,175 | +27,175 | $132.6K | +$132.6K | — |
| De Lisle Partners LLP | 25,000 | +25,000 | $122.0K | +$122.0K | — |
| Quadrature Capital Ltd | 23,004 | +23,004 | $112.3K | +$112.3K | — |
| MARSHALL WACE, LLP | 21,983 | +21,983 | $107.3K | +$107.3K | — |
| PRELUDE CAPITAL MANAGEMENT, LLC | 15,180 | +15,180 | $74.1K | +$74.1K | — |
| Heron Bay Capital Management | 13,471 | +13,471 | $65.7K | +$65.7K | — |
| Spears Abacus Advisors LLC | 11,000 | +11,000 | $53.7K | +$53.7K | — |
| Centiva Capital, LP | 10,835 | +10,835 | $52.9K | +$52.9K | — |
| NORTHERN TRUST CORP | 10,828 | +10,828 | $52.8K | +$52.8K | — |
| Kestra Advisory Services, LLC | 6,015 | +6,015 | $29.4K | +$29.4K | — |
| SageView Advisory Group, LLC | 590 | +590 | $2.9K | +$2.9K | — |
| Cambridge Investment Research Advisors, Inc. | 69,149 | +69,149 | $337 | +$337 | — |
| HARBOUR INVESTMENTS, INC. | 50 | +50 | $244 | +$244 | — |
| NewEdge Advisors, LLC | 27 | +27 | $132 | +$132 | — |
Added To(11)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Mesirow Financial Investment Management, Inc. | 50,000 | +36,200 | $244.0K | +$178.7K | 262.3% |
| Topline Capital Management, LLC | 614,302 | +18,002 | $3.0M | +$177.3K | 3.0% |
| RENAISSANCE TECHNOLOGIES LLC | 103,772 | +21,272 | $506.4K | +$116.2K | 25.8% |
| MORGAN STANLEY | 17,959 | +16,044 | $87.6K | +$78.6K | 837.8% |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 38,984 | +14,162 | $190.2K | +$72.8K | 57.0% |
| XTX Topco Ltd | 21,617 | +7,062 | $105.5K | +$36.6K | 48.5% |
| HighTower Advisors, LLC | 59,710 | +4,000 | $291.4K | +$27.9K | 7.2% |
| CITADEL ADVISORS LLC | 20,710 | +4,165 | $101.1K | +$22.8K | 25.2% |
| ADVISOR GROUP HOLDINGS, INC. | 1,625 | +1,450 | $7.9K | +$7.1K | 828.6% |
| GOLDMAN SACHS GROUP INC | 18,980 | +337 | $92.6K | +$4.4K | 1.8% |
| Royal Bank of Canada | 738 | +734 | $4.0K | +$4.0K | 18350.0% |
Reduced(10)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| WEXFORD CAPITAL LP | 3,617,033 | 0 | $17.7M | +$542.6K | 0.0% |
| VANGUARD GROUP INC | 233,644 | -47,662 | $1.1M | -$190.4K | -16.9% |
| ELKHORN PARTNERS LIMITED PARTNERSHIP | 7,000 | -5,500 | $34.2K | -$25.0K | -44.0% |
| BARD ASSOCIATES INC | 121,619 | -5,502 | $593.5K | -$7.8K | -4.3% |
| BLAIR WILLIAM & CO/IL | 36,249 | 0 | $176.9K | +$5.4K | 0.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 74,628 | -1,263 | $364.3K | +$5.2K | -1.7% |
| STATE STREET CORP | 15,698 | 0 | $76.6K | +$2.4K | 0.0% |
| DIMENSIONAL FUND ADVISORS LP | 13,601 | 0 | $66.4K | +$2.0K | 0.0% |
| BANK OF AMERICA CORP /DE/ | 73 | -19 | $356 | -$79 | -20.6% |
| JONES FINANCIAL COMPANIES LLLP | 31 | 0 | $151 | +$13 | 0.0% |
Sold Out(3)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0 | -10,373 | $0 | -$49.1K | — |
| BARCLAYS PLC | 0 | -106 | $0 | -$501 | — |
| UBS Group AG | 0 | -66 | $0 | -$312 | — |
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
| Manager | Shares | $ Value | Δ Shares | QoQ % |
|---|---|---|---|---|
| WEXFORD CAPITAL LP | 3,617,033 | $17.7M | 0 | 0.0% |
| Topline Capital Management, LLC | 614,302 | $3.0M | +18,002 | 3.0% |
| VANGUARD GROUP INC | 233,644 | $1.1M | -47,662 | -16.9% |
| BARD ASSOCIATES INC | 121,619 | $593.5K | -5,502 | -4.3% |
| RENAISSANCE TECHNOLOGIES LLC | 103,772 | $506.4K | +21,272 | 25.8% |
| GEODE CAPITAL MANAGEMENT, LLC | 74,628 | $364.3K | -1,263 | -1.7% |
| HighTower Advisors, LLC | 59,710 | $291.4K | +4,000 | 7.2% |
| Mesirow Financial Investment Management, Inc. | 50,000 | $244.0K | +36,200 | 262.3% |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 38,984 | $190.2K | +14,162 | 57.0% |
| BLAIR WILLIAM & CO/IL | 36,249 | $176.9K | 0 | 0.0% |
| NAVELLIER & ASSOCIATES INC | 27,175 | $132.6K | +27,175 | — |
| De Lisle Partners LLP | 25,000 | $122.0K | +25,000 | — |
| Quadrature Capital Ltd | 23,004 | $112.3K | +23,004 | — |
| MARSHALL WACE, LLP | 21,983 | $107.3K | +21,983 | — |
| XTX Topco Ltd | 21,617 | $105.5K | +7,062 | 48.5% |
| CITADEL ADVISORS LLC | 20,710 | $101.1K | +4,165 | 25.2% |
| GOLDMAN SACHS GROUP INC | 18,980 | $92.6K | +337 | 1.8% |
| MORGAN STANLEY | 17,959 | $87.6K | +16,044 | 837.8% |
| STATE STREET CORP | 15,698 | $76.6K | 0 | 0.0% |
| PRELUDE CAPITAL MANAGEMENT, LLC | 15,180 | $74.1K | +15,180 | — |
New & Closed Positions this quarter
Closed Positions
3 managers exited
Top five by prior-quarter value
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for NEPH against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.