Nephros
NEPH • NASDAQ
Nephros is a medical - instruments & supplies company in the healthcare sector on NASDAQ, led by Robert Banks, with a market cap of $53.3M. As of Q3 2025, 47% of shares are held by 23 institutional investors, with WEXFORD CAPITAL LP as the largest holder at 34.12%.
Chief Executive OfficerRobert Banks
Market Cap$53.3M
Medical - Instruments & Supplies
Healthcare
Employees31.0
Websitenephros.com
Country
United States of America
Overview
Overview of institutional ownership in NEPH as of Q3 2025 with a market cap of $50.1M
All Institutions
- Institutions
- 23
- Value Held
- $23.7M
- Shares Held
- 5.0M
- Avg Position
- $1.0M
- Median Position
- $74.3K
Hedge Funds
- Hedge Funds
- 4
- Value Held
- $20.4M
- Shares Held
- 4.3M
- Avg Position
- $5.1M
- Median Position
- $1.6M
Ownership Breakdown
Based on market cap of $50.1M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.
Biggest Investors
Institutions with the largest positions in NEPH as of Q3 2025
| Institution | Position Value |
|---|---|
 WEXFORD CAPITAL LP Hedge Fund•Multi-Strategy | $17.1M 5.18% of portfolio |
 Topline Capital Management, LLC Hedge Fund•Long/Short | $2.8M 0.54% of portfolio |
 VANGUARD GROUP INC Institution | $1.3M 0.00% of portfolio |
 BARD ASSOCIATES INC RIA/Wealth | $601.3K 0.16% of portfolio |
 RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant | $390.2K 0.00% of portfolio |
 GEODE CAPITAL MANAGEMENT LLC ETF Provider | $359.1K 0.00% of portfolio |
 HighTower Advisors, LLC RIA/Wealth | $263.5K 0.00% of portfolio |
B BLAIR WILLIAM & CO/IL Institution | $171.5K 0.00% of portfolio |
 ESSEX INVESTMENT MANAGEMENT CO LLC Long Only Manager | $117.4K 0.02% of portfolio |
 GOLDMAN SACHS GROUP INC Institution | $88.2K 0.00% of portfolio |
Net Capital Flow
Institutional buying and selling activity for NEPH in Q3 2025
- Traded
- +$782.3K
- Buyers
- 9
- Sellers
- 8
- Total Bought
- +$1.2M
- Total Sold
- −$405.1K
- Avg Position
- $948.8K
Biggest Buyers
| Institution | Net Bought |
|---|---|
Topline Capital Management, LLC Hedge Fund•Long/Short | +$562.2K +118.9K shares |
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant | +$338.7K +71.6K shares |
GOLDMAN SACHS GROUP INC Institution | +$88.2K +18.6K shares |
X XTX Topco Ltd Institution | +$68.8K +14.6K shares |
 DIMENSIONAL FUND ADVISORS LP Long Only Manager | +$64.3K +13.6K shares |
WEXFORD CAPITAL LP Hedge Fund•Multi-Strategy | +$42.3K +9.0K shares |
 CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | +$22.0K +4.7K shares |
 BARCLAYS PLC Institution | +$501.0 +106.0 shares |
 UBS Group AG Institution | +$312.0 +-2.5K shares |
Biggest Sellers
| Institution | Net Sold |
|---|---|
VANGUARD GROUP INC Institution | −$199.3K −42.1K shares |
 SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | −$90.1K −19.1K shares |
GEODE CAPITAL MANAGEMENT LLC ETF Provider | −$81.8K −17.3K shares |
BARD ASSOCIATES INC RIA/Wealth | −$18.9K −4.0K shares |
E ELKHORN PARTNERS LIMITED PARTNERSHIP Institution | −$9.5K −2.0K shares |
T Tower Research Capital LLC Institution | −$4.5K −1.1K shares |
HighTower Advisors, LLC RIA/Wealth | −$785.2 −166.0 shares |
 BANK OF AMERICA CORP /DE/ Institution | −$141.8 −30.0 shares |
Entry and Exit Activity
Institutions that initiated new positions or completely exited NEPH in Q3 2025
- New Positions
- 2
- New Value
- $69.3K
- Exited Positions
- 1
- Exited Value
- $4.5K
New Positions
| Institution | Position Value |
|---|---|
X XTX Topco Ltd Institution | $68.8K 14.6K shares |
BARCLAYS PLC Institution | $501.0 106.0 shares |
Exited Positions
| Institution | Previous Position |
|---|---|
T Tower Research Capital LLC Institution | $4.5K 1.1K shares |
Options Activity
Institutions with the largest Call and Put options positions in NEPH as of Q3 2025
- Call Positions
- 0
- Call Value
- -
- Put Positions
- 0
- Put Value
- -
Call Positions
| Institution | Position Value |
|---|---|
| No call positions found | |
Put Positions
| Institution | Position Value |
|---|---|
| No put positions found | |
Most Committed Institutions
Institutions with NEPH as the highest % of their portfolio as of Q3 2025
| Institution | Portfolio Weight |
|---|---|
WEXFORD CAPITAL LP Hedge Fund•Multi-Strategy | 5.18% $17.1M |
Topline Capital Management, LLC Hedge Fund•Long/Short | 0.54% $2.8M |
BARD ASSOCIATES INC RIA/Wealth | 0.16% $601.3K |
E ELKHORN PARTNERS LIMITED PARTNERSHIP Institution | 0.04% $59.1K |
ESSEX INVESTMENT MANAGEMENT CO LLC Long Only Manager | 0.02% $117.4K |
X XTX Topco Ltd Institution | 0.00% $68.8K |
0.00% $65.3K | |
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant | 0.00% $390.2K |
B BLAIR WILLIAM & CO/IL Institution | 0.00% $171.5K |
HighTower Advisors, LLC RIA/Wealth | 0.00% $263.5K |
Hedge Fund Spotlight
Discover hedge funds investing in NEPH
CITADEL ADVISORS LLC
Hedge Fund • Multi-Strategy
Portfolio ManagerKenneth Cordele Griffin
- Portfolio Value
- $122.08B
- Positions
- 5,531
- Last Reported
- Q3 2025
Sector Allocation
Position in Nephros
- Market Value
- $78.3K
- Shares Held
- 16.5K
- Portfolio Weight
- 0.00%
- Owned Since
- 2024-Q2
| Top Holding | Sector | Market Value | Weight |
|---|---|---|---|
Software - Infrastructure Technology | $2.1B | 1.68% | |
Semiconductors Technology | $1.8B | 1.50% | |
Internet Content & Information Communication Services | $1.4B | 1.18% |
