ProPhase Labs
PRPH
PRPH was delisted on the 2nd of January, 2026.
21 hedge funds and large institutions have $8.56M invested in ProPhase Labs in 2021 Q3 according to their latest regulatory filings, with 4 funds opening new positions, 9 increasing their positions, 5 reducing their positions, and 6 closing their positions.
80% more repeat investments, than reductions
Existing positions increased: 9 | Existing positions reduced: 5
0.03% more ownership
Funds ownership: 1.06% → 1.09% (+0.03%)
9% less funds holding
Funds holding: 23 → 21 (-2)
14% less capital invested
Capital invested by funds: $9.95M → $8.56M (-$1.39M)
24% less call options, than puts
Call options by funds: $315K | Put options by funds: $413K
33% less first-time investments, than exits
New positions opened: 4 | Existing positions closed: 6
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Bank of Montreal
Toronto,
Ontario, Canada
|
+$945K |
| 2 |
AWE
Avidian Wealth Enterprises
Houston,
Texas
|
+$299K |
| 3 |
Marshall Wace
London,
United Kingdom
|
+$136K |
| 4 |
HS
HighVista Strategies
Boston,
Massachusetts
|
+$121K |
| 5 |
State Street
Boston,
Massachusetts
|
+$79.8K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Renaissance Technologies
New York
|
-$303K |
| 2 |
Millennium Management
New York
|
-$289K |
| 3 |
Bank of New York Mellon
New York
|
-$251K |
| 4 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$225K |
| 5 |
KSCM
Kamunting Street Capital Management
Miami Beach,
Florida
|
-$145K |
PRPH Hedge Fund Activity: Q3 2021 in Review
21 of the 5,728 institutional investors tracked by Wall St. Rank reported a position in ProPhase Labs (PRPH) for Q3 2021, worth a combined $8.56M — down 14% from $9.95M a quarter earlier.
Sellers outnumbered buyers: 6 funds closed out of PRPH and 4 opened new positions — a net loss of 2 holders — while 5 trimmed existing stakes and 9 added.
The largest buyer was Bank of Montreal, opening a new position worth an estimated $945K. The largest seller was Renaissance Technologies, cutting an estimated $303K.
- 21 institutional investors held ProPhase Labs (PRPH) as of Q3 2021, down from 23 in Q2 2021.
- Funds reported $8.56M of ProPhase Labs stock for Q3 2021, down 14% quarter-over-quarter.
- 4 funds opened new ProPhase Labs positions in Q3 2021 and 6 closed out, a net change of -2 holders.
- The largest ProPhase Labs buyer in Q3 2021 was Bank of Montreal, an estimated $945K added.
- The largest ProPhase Labs seller in Q3 2021 was Renaissance Technologies, an estimated $303K sold.
Based on aggregated 13F filings for Q3 2021.