Nephros
NEPH
24 hedge funds and large institutions have $23.7M invested in Nephros in 2025 Q3 according to their latest regulatory filings, with 4 funds opening new positions, 4 increasing their positions, 8 reducing their positions, and 1 closing their positions.
300% more first-time investments, than exits
New positions opened: 4 | Existing positions closed: 1
20% more capital invested
Capital invested by funds: $19.8M → $23.7M (+$3.88M)
14% more funds holding
Funds holding: 21 → 24 (+3)
1.53% more ownership
Funds ownership: 45.78% → 47.31% (+1.5%)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
50% less repeat investments, than reductions
Existing positions increased: 4 | Existing positions reduced: 8
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
TCM
Topline Capital Management
Santa Monica,
California
|
+$467K |
| 2 |
Renaissance Technologies
New York
|
+$281K |
| 3 |
Goldman Sachs
New York
|
+$73.2K |
| 4 |
XT
XTX Topco
George Town,
Cayman Islands
|
+$57.2K |
| 5 |
Dimensional Fund Advisors
Austin,
Texas
|
+$53.4K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Group
Malvern,
Pennsylvania
|
-$165K |
| 2 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$74.8K |
| 3 |
Geode Capital Management
Boston,
Massachusetts
|
-$67.9K |
| 4 |
BA
Bard Associates
Chicago,
Illinois
|
-$15.7K |
| 5 |
UBS Group
Zurich,
Switzerland
|
-$9.65K |
NEPH Hedge Fund Activity: Q3 2025 in Review
24 of the 7,645 institutional investors tracked by Wall St. Rank reported a position in Nephros (NEPH) for Q3 2025, worth a combined $23.7M — up 20% from $19.8M a quarter earlier.
Buyers outnumbered sellers: 4 funds opened new NEPH positions and 1 closed out — a net gain of 3 holders — while 4 added to existing stakes and 8 trimmed.
The largest buyer was Topline Capital Management, adding an estimated $467K. The largest seller was Vanguard Group, cutting an estimated $165K.
- 24 institutional investors held Nephros (NEPH) as of Q3 2025, up from 21 in Q2 2025.
- Funds reported $23.7M of Nephros stock for Q3 2025, up 20% quarter-over-quarter.
- 4 funds opened new Nephros positions in Q3 2025 and 1 closed out, a net change of +3 holders.
- The largest Nephros buyer in Q3 2025 was Topline Capital Management, an estimated $467K added.
- The largest Nephros seller in Q3 2025 was Vanguard Group, an estimated $165K sold.
Based on aggregated 13F filings for Q3 2025.