Nephros
NEPH
27 hedge funds and large institutions have $16M invested in Nephros in 2026 Q1 according to their latest regulatory filings, with 3 funds opening new positions, 6 increasing their positions, 9 reducing their positions, and 9 closing their positions.
0.56% more ownership
Funds ownership: 49.9% → 50.45% (+0.56%)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
23% less funds holding
Funds holding: 35 → 27 (-8)
33% less repeat investments, than reductions
Existing positions increased: 6 | Existing positions reduced: 9
38% less capital invested
Capital invested by funds: $25.9M → $16M (-$9.87M)
67% less first-time investments, than exits
New positions opened: 3 | Existing positions closed: 9
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CC
Cornerstone Capital
Palo Alto,
California
|
+$514K |
| 2 |
Morgan Stanley
New York
|
+$371K |
| 3 |
MFIM
Mesirow Financial Investment Management
Chicago,
Illinois
|
+$279K |
| 4 |
Dimensional Fund Advisors
Austin,
Texas
|
+$28.5K |
| 5 |
EP
Elkhorn Partners
Omaha,
Nebraska
|
+$20K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Cambridge Investment Research Advisors
Fairfield,
Iowa
|
-$337K |
| 2 |
TCM
Topline Capital Management
Santa Monica,
California
|
-$129K |
| 3 |
QC
Quadrature Capital
London,
United Kingdom
|
-$112K |
| 4 |
Marshall Wace
London,
United Kingdom
|
-$107K |
| 5 |
XT
XTX Topco
George Town,
Cayman Islands
|
-$105K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
HI
26
Harbour Investments
Madison,
Wisconsin
| $149 | – | – | – |
|
27
Jones Financial Companies
Des Peres,
Missouri
| $90 | – | – | – |
|
|
28
Cambridge Investment Research Advisors
Fairfield,
Iowa
| – | -$337K | -69,149 | Closed |
|
|
QC
29
Quadrature Capital
London,
United Kingdom
| – | -$112K | -23,004 | Closed |
|
|
30
Marshall Wace
London,
United Kingdom
| – | -$107K | -21,983 | Closed |
|
|
XT
31
XTX Topco
George Town,
Cayman Islands
| – | -$105K | -21,617 | Closed |
|
|
HBCM
32
Heron Bay Capital Management
Bloomfield Hills,
Michigan
| – | -$65.7K | -13,471 | Closed |
|
|
CC
33
Centiva Capital
New York
| – | -$52.9K | -10,835 | Closed |
|
|
KAS
34
Kestra Advisory Services
Austin,
Texas
| – | -$29.4K | -6,015 | Closed |
|
35
Bank of America
Charlotte,
North Carolina
| – | -$356 | -73 | Closed |
|
|
NA
36
NewEdge Advisors
New Orleans,
Louisiana
| – | -$132 | -27 | Closed |
|
NEPH Hedge Fund Activity: Q1 2026 in Review
27 of the 8,130 institutional investors tracked by Wall St. Rank reported a position in Nephros (NEPH) for Q1 2026, worth a combined $16M — down 38% from $25.9M a quarter earlier.
Sellers outnumbered buyers: 9 funds closed out of NEPH and 3 opened new positions — a net loss of 6 holders — while 9 trimmed existing stakes and 6 added.
The largest buyer was Cornerstone Capital, opening a new position worth an estimated $514K. The largest seller was Cambridge Investment Research Advisors, exiting entirely with an estimated $337K sold.
- 27 institutional investors held Nephros (NEPH) as of Q1 2026, down from 35 in Q4 2025.
- Funds reported $16M of Nephros stock for Q1 2026, down 38% quarter-over-quarter.
- 3 funds opened new Nephros positions in Q1 2026 and 9 closed out, a net change of -6 holders.
- The largest Nephros buyer in Q1 2026 was Cornerstone Capital, an estimated $514K added.
- The largest Nephros seller in Q1 2026 was Cambridge Investment Research Advisors, an estimated $337K sold.
Based on aggregated 13F filings for Q1 2026.