Holder evidence
38
SEC ownership of NEPHROS INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001196298.
Lead holder
Topline Capital Management, LLC
13D/G signal
Topline Capital Management, LLC
Latest evidence
31 Mar 2026
- CIK
- 0001196298
- Symbol
- NEPH on Nasdaq
- Location
- South Orange, NJ
- SEC evidence mix
- 13D/G, 13F, and 3/4/5
- Lead holder
- Topline Capital Management, LLC
- Latest large-stake holder
- Topline Capital Management, LLC
- Latest evidence date
- 31 Mar 2026
Issuer identity
Ownership snapshot
Ownership snapshot
Top shareholders of NEPHROS INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Lead holder
Topline Capital Managemen...
13D/G signal
Topline Capital Managemen...
Evidence rows
38
Latest as of
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 5.6%
13D/G row: Topline Capital Management, LLC
Showing 1-8 of 38 holder rows.
Rank 1 holder
Topline Capital Management, LLC
13D/G
13F
- Ownership
- 5.6%
- Position
- $2.82M
Rank 2 holder
WEXFORD CAPITAL LP
13F
3/4/5
- Ownership
- 34%
- Position
- $10.73M
Rank 3 holder
VANGUARD CAPITAL MANAGEMENT LLC
13F
- Ownership
- 1.9%
- Position
- $592K
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Topline Capital Management, LLC |
13D/G
13F
Company
|
5.6%
|
$2,815,930
595,334 shares
|
$0 | 04 Aug 2025 |
| WEXFORD CAPITAL LP |
13F
3/4/5
Company · 10%+ Owner
|
34%
|
$10,729,646
3,600,552 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
1.9%
|
$591,956
198,643 shares
|
— | 31 Mar 2026 |
| Cornerstone Capital, Inc. |
13F
Company
|
1.2%
|
$383,526
128,700 shares
|
— | 31 Mar 2026 |
| BARD ASSOCIATES INC |
13F
Company
|
1.1%
|
$361,182
121,202 shares
|
— | 31 Mar 2026 |
| Mesirow Financial Investment Management, Inc. |
13F
Company
|
1.1%
|
$357,600
120,000 shares
|
— | 31 Mar 2026 |
| MORGAN STANLEY |
13F
Company
|
1%
|
$330,527
110,915 shares
|
— | 31 Mar 2026 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
0.94%
|
$296,212
99,400 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 31 May 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-12 of 12 reporting-owner rows connected to NEPHROS INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
12
Lead holder
WEXFORD CAPITAL LP
Net 12M change
$0
Latest report
23 Mar 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| WEXFORD CAPITAL LP | 10%+ Owner | $8,810,910 | Mixed | 13 Mar 2024 | ||
| Robert R. Banks Jr. | President and CEO | $1,880,603 | Mixed | 23 Mar 2026 | ||
| Oliver Spandow Power | Director | $614,573 | Mixed | 10 Nov 2025 | ||
| Arthur H. Amron | Director | $570,566 | Mixed | 16 Mar 2026 | ||
| Judy Krandel Power | Chief Financial Officer | $551,766 | Mixed | 23 Mar 2026 | ||
| Daron Evans | CEO Specialty Renal Products | $351,795 | Mixed | 24 May 2021 | ||
| Andrew Astor Power | President, CEO & CFO, Director | $204,342 | Mixed | 05 Mar 2022 | ||
| Alisa Lask | Director | $109,167 | Mixed | 01 Jan 2025 | ||
| Tom Gwydir Power | Director | $95,210 | Mixed | 05 Jan 2023 | ||
| Wesley S. Lobo | Chief Marketing Officer | $77,461 | Mixed | 16 Feb 2022 | ||
| Lisa Nettis Power | Director | $70,245 | Mixed | 10 Nov 2025 | ||
| Joseph Michael Harris | Director | $39,719 | Mixed | 01 Jan 2025 |
Recent insider transactions for NEPHROS INC
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Reported value | Reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Robert R. Banks Jr. | NEPH | Common Stock | Options Exercise | 171.4% | 120,000 | 190,000 | 23 Mar 2026 | Direct | ||
| Robert R. Banks Jr. | NEPH | Stock Option (right to buy) | Options Exercise | -33.6% | -120,000 | 237,165 | 23 Mar 2026 | Direct | ||
| Judy Krandel Power | NEPH | Common Stock | Options Exercise | 68,861 | 68,861 | 23 Mar 2026 | Direct | |||
| Judy Krandel Power | NEPH | Stock Option (right to buy) | Options Exercise | -56.2% | -68,861 | 53,663 | 23 Mar 2026 | Direct | ||
| Arthur H. Amron | NEPH | Common Stock | Award | 2.75% | 3,610 | 134,882 | 16 Mar 2026 | Direct | ||
| Judy Krandel Power | NEPH | Stock Option (right to buy) | Award | 4,000 | 4,000 | 16 Mar 2026 | Direct | |||
| Lisa Nettis Power | NEPH | Common Stock | Award | 1,622 | 1,622 | 10 Nov 2025 | Direct | |||
| Oliver Spandow Power | NEPH | Common Stock | Award | 7% | 8,036 | 122,881 | 10 Nov 2025 | Direct | ||
| Arthur H. Amron | NEPH | Common Stock | Award | 4.28% | 5,391 | 131,272 | 10 Nov 2025 | Direct | ||
| Lisa Nettis Power | NEPH | Stock Option (right to buy) | Award | 13,229 | 13,229 | 11 Aug 2025 | Direct |
* indicates a reported price that failed the local validity check.