Nephros Ownership | Who Owns Nephros?
Nephros Ownership Summary
Nephros is owned by 8.84% institutional investors, 11.10% insiders, and 80.05% retail investors. Wexford capital lp is the largest institutional shareholder, holding 33.93% of NEPH shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 1.22% of its assets in Nephros shares.
NEPH Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Nephros | 8.84% | 11.10% | 80.05% |
| Sector | Healthcare Stocks | 35.58% | 11.87% | 52.55% |
| Industry | Medical Instruments & Supplies Stocks | 35.51% | 13.37% | 51.13% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Wexford capital lp | 3.60M | 33.93% | $10.73M |
| Topline capital management | 581.97K | 5.48% | $1.73M |
| Vanguard group | 233.64K | 2.20% | $1.14M |
| Cornerstone capital | 128.70K | 1.21% | $383.53K |
| Bard associates | 121.20K | 1.14% | $361.18K |
| Mesirow financial investment management | 120.00K | 1.13% | $357.60K |
| Morgan stanley | 110.92K | 1.05% | $330.53K |
| Renaissance | 99.40K | 0.94% | $296.21K |
| Geode capital management | 72.92K | 0.69% | $217.38K |
| Hightower advisors | 59.71K | 0.56% | $177.94K |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Wexford capital lp | 3.60M | 1.55% | $10.73M |
| Topline capital management | 581.97K | 0.29% | $1.73M |
| Bard associates | 121.20K | 0.09% | $361.18K |
| Cornerstone capital | 128.70K | 0.04% | $383.53K |
| Elkhorn partners limited partnership | 12.00K | 0.02% | $35.76K |
| Essex investment management | 38.98K | 0.02% | $116.17K |
| De lisle partners llp | 25.00K | 0.01% | $74.50K |
| Navellier & associates | 19.13K | 0.01% | $56.99K |
| Mesirow financial investment management | 120.00K | 0.01% | $357.60K |
| Prelude capital management | 13.68K | 0.00% | $40.77K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Cornerstone capital | 128.70K | 0.04% | 128.70K |
| Morgan stanley | 110.92K | - | 92.96K |
| Mesirow financial investment management | 120.00K | 0.01% | 70.00K |
| Vanguard fiduciary trust | 36.90K | - | 36.90K |
| Susquehanna group, llp | 23.80K | - | 23.80K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Cambridge investment research advisors | - | - | -69.15K |
| Vanguard group | 233.64K | - | -47.66K |
| Topline capital management | 581.97K | 0.29% | -32.34K |
| Quadrature capital | - | - | -23.00K |
| Marshall wace, llp | - | - | -21.98K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Cornerstone capital | 128.70K | 0.04% | 128.70K | $383.53K |
| Vanguard fiduciary trust | 36.90K | - | 36.90K | $109.97K |
| Susquehanna group, llp | 23.80K | - | 23.80K | $34.75K |
Sold Out
| Holder | Change |
|---|---|
| Jpmorgan chase | -13.00 |
| Newedge advisors | -36.00 |
| Ubs group | -66.00 |
| Wells fargo & company/mn | -73.00 |
| Barclays | -106.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 15 | -57.14% | 938,488 | -82.30% | 8 | 0.35% | 6 | -76.00% | 3 | -40.00% |
| Dec 31, 2025 | 21 | -8.70% | 4,540,044 | -9.47% | 42 | 1.91% | 15 | 87.50% | 3 | -62.50% |
| Sep 30, 2025 | 23 | 15.00% | 5,015,032 | 3.35% | 47 | 2.26% | 8 | -27.27% | 8 | 60.00% |
| Jun 30, 2025 | 19 | 11.76% | 4,852,137 | 4.02% | 45 | 2.36% | 10 | 66.67% | 5 | - |
| Mar 31, 2025 | 17 | - | 4,665,065 | -0.99% | 44 | 2.20% | 6 | 50.00% | 5 | -28.57% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 129.66K | 1.22% | - |
| Vanguard Total Stock Mkt Idx Inv | 130.90K | 1.21% | - |
| Vanguard Institutional Extnd Mkt Idx Tr | 67.74K | 0.62% | - |
| Fidelity Extended Market Index | 35.21K | 0.32% | 4.52K |
| Navellier Small-Mid Cap Growth | 35.02K | 0.32% | - |
| Fidelity Total Market Index | 11.57K | 0.11% | - |
| Northern Trust Extended Eq Market Idx | 10.61K | 0.10% | 3.54K |
| NT Ext Equity Mkt Idx Fd - L | 10.61K | 0.10% | - |
| NT Ext Equity Mkt Index Fund - Lending | 10.61K | 0.10% | - |
| Fidelity Series Total Market Index | 9.53K | 0.09% | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| May 28, 2024 | Amron Arthur H | - | Buy | $4.44K |
| May 30, 2024 | Amron Arthur H | - | Buy | $6.73K |
| May 16, 2024 | Banks Robert R. Jr. | President and CEO | Buy | $112.05K |
| Mar 12, 2024 | Amron Arthur H | - | Buy | $17.13K |
| Dec 07, 2023 | Banks Robert R. Jr. | President and CEO | Buy | $39.65K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q1 | - | - |
| 2025 Q4 | - | - |
| 2025 Q3 | - | - |
| 2025 Q2 | - | - |
| 2025 Q1 | - | - |
NEPH Ownership FAQ
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