Cytosorbents Corp
CTSO
51 hedge funds and large institutions have $10.8M invested in Cytosorbents Corp in 2025 Q4 according to their latest regulatory filings, with 9 funds opening new positions, 14 increasing their positions, 10 reducing their positions, and 6 closing their positions.
50% more first-time investments, than exits
New positions opened: 9 | Existing positions closed: 6
40% more repeat investments, than reductions
Existing positions increased: 14 | Existing positions reduced: 10
4% more funds holding
Funds holding: 49 → 51 (+2)
0.82% more ownership
Funds ownership: 26.03% → 26.85% (+0.82%)
29% less capital invested
Capital invested by funds: $15.3M → $10.8M (-$4.48M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Pathstone Holdings
Englewood,
New Jersey
|
+$385K |
| 2 |
CM
CM Management
Gulf Breeze,
Florida
|
+$145K |
| 3 |
AC
Avenir Corporation
Alexandria,
Virginia
|
+$113K |
| 4 |
Citadel Advisors
Miami,
Florida
|
+$64.3K |
| 5 |
GCP
GSA Capital Partners
London,
United Kingdom
|
+$27.8K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SC
Skylands Capital
Milwaukee,
Wisconsin
|
-$210K |
| 2 |
SIG
Sargent Investment Group
Bethesda,
Maryland
|
-$97.5K |
| 3 |
KAS
Kestra Advisory Services
Austin,
Texas
|
-$29.9K |
| 4 |
Renaissance Technologies
New York
|
-$26.7K |
| 5 |
Goldman Sachs
New York
|
-$18.9K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
51
BNP Paribas Financial Markets
Paris,
France
| $13 | – | – | – |
|
52
SEI Investments
Oaks,
Pennsylvania
| – | -$16.6K | -17,734 | Closed |
|
|
TSS
53
Two Sigma Securities
New York
| – | -$14.7K | -15,737 | Closed |
|
|
CPIG
54
Chicago Partners Investment Group
Chicago,
Illinois
| – | -$11.9K | -14,209 | Closed |
|
|
CC
55
Centiva Capital
New York
| – | -$10K | -10,737 | Closed |
|
56
Royal Bank of Canada
Toronto,
Ontario, Canada
| – | -$1K | -1,100 | Closed |
|
|
SS
57
SBI Securities
Tokyo,
Japan
| – | -$1 | -1 | Closed |
|
CTSO Hedge Fund Activity: Q4 2025 in Review
51 of the 8,245 institutional investors tracked by Wall St. Rank reported a position in Cytosorbents Corp (CTSO) for Q4 2025, worth a combined $10.8M — down 29% from $15.3M a quarter earlier.
Buyers outnumbered sellers: 9 funds opened new CTSO positions and 6 closed out — a net gain of 3 holders — while 14 added to existing stakes and 10 trimmed.
The largest buyer was Pathstone Holdings, opening a new position worth an estimated $385K. The largest seller was Skylands Capital, cutting an estimated $210K.
- 51 institutional investors held Cytosorbents Corp (CTSO) as of Q4 2025, up from 49 in Q3 2025.
- Funds reported $10.8M of Cytosorbents Corp stock for Q4 2025, down 29% quarter-over-quarter.
- 9 funds opened new Cytosorbents Corp positions in Q4 2025 and 6 closed out, a net change of +3 holders.
- The largest Cytosorbents Corp buyer in Q4 2025 was Pathstone Holdings, an estimated $385K added.
- The largest Cytosorbents Corp seller in Q4 2025 was Skylands Capital, an estimated $210K sold.
Based on aggregated 13F filings for Q4 2025.