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
4% less capital invested
Capital invested by funds: $112K → $108K (-$4.04K)
3.23% less ownership
Funds ownership: 9.28% → 6.05% (-3.2%)
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 |
BJDX Hedge Fund Activity: Q1 2026 in Review
6 of the 8,207 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.