ProPhase Labs
PRPH
PRPH was delisted on the 2nd of January, 2026.
39 hedge funds and large institutions have $18.6M invested in ProPhase Labs in 2023 Q1 according to their latest regulatory filings, with 3 funds opening new positions, 12 increasing their positions, 15 reducing their positions, and 13 closing their positions.
0.27% less ownership
Funds ownership: 1.69% → 1.42% (-0.27%)
20% less repeat investments, than reductions
Existing positions increased: 12 | Existing positions reduced: 15
22% less funds holding
Funds holding: 50 → 39 (-11)
30% less capital invested
Capital invested by funds: $26.5M → $18.6M (-$7.9M)
41% less call options, than puts
Call options by funds: $152K | Put options by funds: $256K
77% less first-time investments, than exits
New positions opened: 3 | Existing positions closed: 13
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CD
Chapin Davis
Baltimore,
Maryland
|
+$242K |
| 2 |
Vanguard Group
Malvern,
Pennsylvania
|
+$228K |
| 3 |
Victory Capital Management
San Antonio,
Texas
|
+$115K |
| 4 |
Citadel Advisors
Miami,
Florida
|
+$113K |
| 5 |
American Century Companies
Kansas City,
Missouri
|
+$106K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Bank of Montreal
Toronto,
Ontario, Canada
|
-$671K |
| 2 |
Marshall Wace
London,
United Kingdom
|
-$299K |
| 3 |
Acadian Asset Management
Boston,
Massachusetts
|
-$298K |
| 4 |
Cambridge Investment Research Advisors
Fairfield,
Iowa
|
-$296K |
| 5 |
Renaissance Technologies
New York
|
-$273K |
PRPH Hedge Fund Activity: Q1 2023 in Review
39 of the 6,282 institutional investors tracked by Wall St. Rank reported a position in ProPhase Labs (PRPH) for Q1 2023, worth a combined $18.6M — down 30% from $26.5M a quarter earlier.
Sellers outnumbered buyers: 13 funds closed out of PRPH and 3 opened new positions — a net loss of 10 holders — while 15 trimmed existing stakes and 12 added.
The largest buyer was Chapin Davis, opening a new position worth an estimated $242K. The largest seller was Bank of Montreal, exiting entirely with an estimated $671K sold.
- 39 institutional investors held ProPhase Labs (PRPH) as of Q1 2023, down from 50 in Q4 2022.
- Funds reported $18.6M of ProPhase Labs stock for Q1 2023, down 30% quarter-over-quarter.
- 3 funds opened new ProPhase Labs positions in Q1 2023 and 13 closed out, a net change of -10 holders.
- The largest ProPhase Labs buyer in Q1 2023 was Chapin Davis, an estimated $242K added.
- The largest ProPhase Labs seller in Q1 2023 was Bank of Montreal, an estimated $671K sold.
Based on aggregated 13F filings for Q1 2023.