ProPhase Labs
PRPH
PRPH was delisted on the 2nd of January, 2026.
17 hedge funds and large institutions have $92.9K invested in ProPhase Labs in 2025 Q4 according to their latest regulatory filings, with 3 funds opening new positions, 5 increasing their positions, 6 reducing their positions, and 14 closing their positions.
0.27% less ownership
Funds ownership: 0.72% → 0.45% (-0.27%)
17% less repeat investments, than reductions
Existing positions increased: 5 | Existing positions reduced: 6
39% less funds holding
Funds holding: 28 → 17 (-11)
79% less first-time investments, than exits
New positions opened: 3 | Existing positions closed: 14
93% less capital invested
Capital invested by funds: $1.36M → $92.9K (-$1.27M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Jane Street
New York
|
+$61.8K |
| 2 |
SG
StoneX Group
New York
|
+$56.3K |
| 3 |
Simplex Trading
Chicago,
Illinois
|
+$9.49K |
| 4 |
UBS Group
Zurich,
Switzerland
|
+$3.04K |
| 5 |
CA
CoreCap Advisors
Southfield,
Michigan
|
+$2K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$182K |
| 2 |
AWP
Accretive Wealth Partners
Parsippany,
New Jersey
|
-$114K |
| 3 |
AWM
Apollon Wealth Management
Mount Pleasant,
South Carolina
|
-$83.5K |
| 4 |
Geode Capital Management
Boston,
Massachusetts
|
-$39.5K |
| 5 |
CD
Chapin Davis
Baltimore,
Maryland
|
-$36.6K |
PRPH Hedge Fund Activity: Q4 2025 in Review
17 of the 8,265 institutional investors tracked by Wall St. Rank reported a position in ProPhase Labs (PRPH) for Q4 2025, worth a combined $92.9K — down 93% from $1.36M a quarter earlier.
Sellers outnumbered buyers: 14 funds closed out of PRPH and 3 opened new positions — a net loss of 11 holders — while 6 trimmed existing stakes and 5 added.
The largest buyer was Jane Street, opening a new position worth an estimated $61.8K. The largest seller was Susquehanna International Group, exiting entirely with an estimated $182K sold.
- 17 institutional investors held ProPhase Labs (PRPH) as of Q4 2025, down from 28 in Q3 2025.
- Funds reported $92.9K of ProPhase Labs stock for Q4 2025, down 93% quarter-over-quarter.
- 3 funds opened new ProPhase Labs positions in Q4 2025 and 14 closed out, a net change of -11 holders.
- The largest ProPhase Labs buyer in Q4 2025 was Jane Street, an estimated $61.8K added.
- The largest ProPhase Labs seller in Q4 2025 was Susquehanna International Group, an estimated $182K sold.
Based on aggregated 13F filings for Q4 2025.