ProPhase Labs
PRPH
PRPH was delisted on the 2nd of January, 2026.
27 hedge funds and large institutions have $7.63M invested in ProPhase Labs in 2023 Q4 according to their latest regulatory filings, with 1 funds opening new positions, 9 increasing their positions, 9 reducing their positions, and 9 closing their positions.
0% more repeat investments, than reductions
Existing positions increased: 9 | Existing positions reduced: 9
0.23% less ownership
Funds ownership: 1.16% → 0.94% (-0.23%)
11% less capital invested
Capital invested by funds: $8.56M → $7.63M (-$933K)
23% less funds holding
Funds holding: 35 → 27 (-8)
89% less first-time investments, than exits
New positions opened: 1 | Existing positions closed: 9
93% less call options, than puts
Call options by funds: $2K | Put options by funds: $27K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Northern Trust
Chicago,
Illinois
|
+$103K |
| 2 |
Geode Capital Management
Boston,
Massachusetts
|
+$47.5K |
| 3 |
Vanguard Group
Malvern,
Pennsylvania
|
+$34.2K |
| 4 |
TRCT
Tower Research Capital (TRC)
New York
|
+$22.9K |
| 5 |
BlackRock
New York
|
+$7.11K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
American Century Companies
Kansas City,
Missouri
|
-$334K |
| 2 |
Goldman Sachs
New York
|
-$231K |
| 3 |
KOC
Koss-Olinger Consulting
Gainesville,
Florida
|
-$184K |
| 4 |
Renaissance Technologies
New York
|
-$175K |
| 5 |
Bank of New York Mellon
New York
|
-$95.1K |
PRPH Hedge Fund Activity: Q4 2023 in Review
27 of the 6,868 institutional investors tracked by Wall St. Rank reported a position in ProPhase Labs (PRPH) for Q4 2023, worth a combined $7.63M — down 11% from $8.56M a quarter earlier.
Sellers outnumbered buyers: 9 funds closed out of PRPH and 1 opened new positions — a net loss of 8 holders — while 9 trimmed existing stakes and 9 added.
The largest buyer was Northern Trust, adding an estimated $103K. The largest seller was American Century Companies, exiting entirely with an estimated $334K sold.
- 27 institutional investors held ProPhase Labs (PRPH) as of Q4 2023, down from 35 in Q3 2023.
- Funds reported $7.63M of ProPhase Labs stock for Q4 2023, down 11% quarter-over-quarter.
- 1 fund opened new ProPhase Labs positions in Q4 2023 and 9 closed out, a net change of -8 holders.
- The largest ProPhase Labs buyer in Q4 2023 was Northern Trust, an estimated $103K added.
- The largest ProPhase Labs seller in Q4 2023 was American Century Companies, an estimated $334K sold.
Based on aggregated 13F filings for Q4 2023.