Bluejay Diagnostics
BJDX
6 hedge funds and large institutions have $108K invested in Bluejay Diagnostics in 2026 Q1 according to their latest regulatory filings, with 3 funds opening new positions, 2 increasing their positions, 1 reducing their positions, and 5 closing their positions.
100% more repeat investments, than reductions
Existing positions increased: 2 | Existing positions reduced: 1
3.73% more ownership
Funds ownership: 2.32% → 6.05% (+3.7%)
4% less capital invested
Capital invested by funds: $112K → $108K (-$4.04K)
25% less funds holding
Funds holding: 8 → 6 (-2)
40% less first-time investments, than exits
New positions opened: 3 | Existing positions closed: 5
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SM
Sabby Management
Miami Beach,
Florida
|
+$71K |
| 2 |
Geode Capital Management
Boston,
Massachusetts
|
+$63.2K |
| 3 |
TRCT
Tower Research Capital (TRC)
New York
|
+$1.53K |
| 4 |
UBS Group
Zurich,
Switzerland
|
+$306 |
| 5 |
CIAM
Caitong International Asset Management
Hong Kong
|
+$7 |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AC
Armistice Capital
New York
|
-$43.4K |
| 2 |
Citadel Advisors
Miami,
Florida
|
-$27.9K |
| 3 |
Renaissance Technologies
New York
|
-$21.4K |
| 4 |
TSS
Two Sigma Securities
New York
|
-$9.57K |
| 5 |
Bank of America
Charlotte,
North Carolina
|
-$10 |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
SM
1
Sabby Management
Miami Beach,
Florida
| $52.9K | +$71K | +28,726 | New |
|
|
2
Geode Capital Management
Boston,
Massachusetts
| $51.8K | +$63.2K | +25,563 | +997% |
|
|
TRCT
3
Tower Research Capital (TRC)
New York
| $3.18K | +$1.53K | +621 | +56% |
|
|
4
UBS Group
Zurich,
Switzerland
| $228 | +$306 | +124 | New |
|
|
LGM
5
L1 Global Manager
Melbourne,
| $220 | -$2 | -1 | -0.8% |
|
|
CIAM
6
Caitong International Asset Management
Hong Kong
| $6 | +$7 | +3 | New |
|
|
AC
7
Armistice Capital
New York
| – | -$43.4K | -16,250 | Closed |
|
|
8
Citadel Advisors
Miami,
Florida
| – | -$27.9K | -10,449 | Closed |
|
|
9
Renaissance Technologies
New York
| – | -$21.4K | -8,025 | Closed |
|
|
TSS
10
Two Sigma Securities
New York
| – | -$9.57K | -3,588 | Closed |
|
|
11
Bank of America
Charlotte,
North Carolina
| – | -$10 | -4 | Closed |
|
|
MC
12
Meteora Capital
Boca Raton,
Florida
| – | -$1 | – | – |
|
BJDX Hedge Fund Activity: Q1 2026 in Review
6 of the 8,134 institutional investors tracked by Wall St. Rank reported a position in Bluejay Diagnostics (BJDX) for Q1 2026, worth a combined $108K — down 3.6% from $112K a quarter earlier.
Sellers outnumbered buyers: 5 funds closed out of BJDX and 3 opened new positions — a net loss of 2 holders — while 1 trimmed existing stakes and 2 added.
The largest buyer was Sabby Management, opening a new position worth an estimated $71K. The largest seller was Armistice Capital, exiting entirely with an estimated $43.4K sold.
- 6 institutional investors held Bluejay Diagnostics (BJDX) as of Q1 2026, down from 8 in Q4 2025.
- Funds reported $108K of Bluejay Diagnostics stock for Q1 2026, down 3.6% quarter-over-quarter.
- 3 funds opened new Bluejay Diagnostics positions in Q1 2026 and 5 closed out, a net change of -2 holders.
- The largest Bluejay Diagnostics buyer in Q1 2026 was Sabby Management, an estimated $71K added.
- The largest Bluejay Diagnostics seller in Q1 2026 was Armistice Capital, an estimated $43.4K sold.
Based on aggregated 13F filings for Q1 2026.