Bluejay Diagnostics
BJDX
4 hedge funds and large institutions have $143K invested in Bluejay Diagnostics in 2025 Q3 according to their latest regulatory filings, with 1 funds opening new positions, 2 increasing their positions, 1 reducing their positions, and 2 closing their positions.
100% more repeat investments, than reductions
Existing positions increased: 2 | Existing positions reduced: 1
0.09% less ownership
Funds ownership: 1.66% → 1.57% (-0.09%)
16% less capital invested
Capital invested by funds: $170K → $143K (-$27.6K)
20% less funds holding
Funds holding: 5 → 4 (-1)
50% less first-time investments, than exits
New positions opened: 1 | Existing positions closed: 2
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
DS
DRW Securities
Chicago,
Illinois
|
+$90.2K |
| 2 |
TRCT
Tower Research Capital (TRC)
New York
|
+$3.28K |
| 3 |
Bank of America
Charlotte,
North Carolina
|
+$12 |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SM
Sabby Management
Miami Beach,
Florida
|
-$100K |
| 2 |
UBS Group
Zurich,
Switzerland
|
-$764 |
| 3 |
Citigroup
New York
|
-$415 |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
DS
1
DRW Securities
Chicago,
Illinois
| $90.8K | +$90.2K | +14,942 | New |
|
|
SM
2
Sabby Management
Miami Beach,
Florida
| $45K | -$100K | -16,601 | -69% |
|
|
TRCT
3
Tower Research Capital (TRC)
New York
| $6.76K | +$3.28K | +544 | +96% |
|
|
4
Bank of America
Charlotte,
North Carolina
| $18 | +$12 | +2 | +200% |
|
|
5
UBS Group
Zurich,
Switzerland
| – | -$764 | -111 | Closed |
|
|
6
Citigroup
New York
| – | -$415 | -60 | Closed |
|
BJDX Hedge Fund Activity: Q3 2025 in Review
4 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in Bluejay Diagnostics (BJDX) for Q3 2025, worth a combined $143K — down 16% from $170K a quarter earlier.
Sellers outnumbered buyers: 2 funds closed out of BJDX and 1 opened new positions — a net loss of 1 holder — while 1 trimmed existing stakes and 2 added.
The largest buyer was DRW Securities, opening a new position worth an estimated $90.2K. The largest seller was Sabby Management, cutting an estimated $100K.
- 4 institutional investors held Bluejay Diagnostics (BJDX) as of Q3 2025, down from 5 in Q2 2025.
- Funds reported $143K of Bluejay Diagnostics stock for Q3 2025, down 16% quarter-over-quarter.
- 1 fund opened new Bluejay Diagnostics positions in Q3 2025 and 2 closed out, a net change of -1 holder.
- The largest Bluejay Diagnostics buyer in Q3 2025 was DRW Securities, an estimated $90.2K added.
- The largest Bluejay Diagnostics seller in Q3 2025 was Sabby Management, an estimated $100K sold.
Based on aggregated 13F filings for Q3 2025.