ProPhase Labs
PRPH
PRPH was delisted on the 2nd of January, 2026.
25 hedge funds and large institutions have $10.8M invested in ProPhase Labs in 2021 Q4 according to their latest regulatory filings, with 10 funds opening new positions, 4 increasing their positions, 4 reducing their positions, and 6 closing their positions.
67% more first-time investments, than exits
New positions opened: 10 | Existing positions closed: 6
26% more capital invested
Capital invested by funds: $8.56M → $10.8M (+$2.26M)
21% more call options, than puts
Call options by funds: $281K | Put options by funds: $233K
19% more funds holding
Funds holding: 21 → 25 (+4)
0% more repeat investments, than reductions
Existing positions increased: 4 | Existing positions reduced: 4
0.11% less ownership
Funds ownership: 1.09% → 0.97% (-0.11%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Ameriprise
Minneapolis,
Minnesota
|
+$838K |
| 2 |
Vanguard Group
Malvern,
Pennsylvania
|
+$190K |
| 3 |
PCM
Perritt Capital Management
Chicago,
Illinois
|
+$127K |
| 4 |
AWE
Avidian Wealth Enterprises
Houston,
Texas
|
+$90.5K |
| 5 |
Citadel Advisors
Miami,
Florida
|
+$41.6K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Bank of Montreal
Toronto,
Ontario, Canada
|
-$821K |
| 2 |
KSCM
Kamunting Street Capital Management
Miami Beach,
Florida
|
-$514K |
| 3 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$196K |
| 4 |
Marshall Wace
London,
United Kingdom
|
-$119K |
| 5 |
HS
HighVista Strategies
Boston,
Massachusetts
|
-$105K |
PRPH Hedge Fund Activity: Q4 2021 in Review
25 of the 6,517 institutional investors tracked by Wall St. Rank reported a position in ProPhase Labs (PRPH) for Q4 2021, worth a combined $10.8M — up 26% from $8.56M a quarter earlier.
Buyers outnumbered sellers: 10 funds opened new PRPH positions and 6 closed out — a net gain of 4 holders — while 4 added to existing stakes and 4 trimmed.
The largest buyer was Ameriprise, opening a new position worth an estimated $838K. The largest seller was Bank of Montreal, exiting entirely with an estimated $821K sold.
- 25 institutional investors held ProPhase Labs (PRPH) as of Q4 2021, up from 21 in Q3 2021.
- Funds reported $10.8M of ProPhase Labs stock for Q4 2021, up 26% quarter-over-quarter.
- 10 funds opened new ProPhase Labs positions in Q4 2021 and 6 closed out, a net change of +4 holders.
- The largest ProPhase Labs buyer in Q4 2021 was Ameriprise, an estimated $838K added.
- The largest ProPhase Labs seller in Q4 2021 was Bank of Montreal, an estimated $821K sold.
Based on aggregated 13F filings for Q4 2021.