Bluejay Diagnostics
BJDX
8 hedge funds and large institutions have $259K invested in Bluejay Diagnostics in 2026 Q2 according to their latest regulatory filings, with 5 funds opening new positions, 1 increasing their positions, 1 reducing their positions, and 3 closing their positions.
140% more capital invested
Capital invested by funds: $108K → $259K (+$151K)
67% more first-time investments, than exits
New positions opened: 5 | Existing positions closed: 3
33% more funds holding
Funds holding: 6 → 8 (+2)
14.84% more ownership
Funds ownership: 6.05% → 20.89% (+15%)
0% more repeat investments, than reductions
Existing positions increased: 1 | Existing positions reduced: 1
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AC
Armistice Capital
New York
|
+$339K |
| 2 |
HCM
Heights Capital Management
San Francisco,
California
|
+$91.6K |
| 3 |
BFM
Boothbay Fund Management
New York
|
+$70.2K |
| 4 |
Bank of America
Charlotte,
North Carolina
|
+$26.7K |
| 5 |
Vanguard Fiduciary Trust
Malvern,
Pennsylvania
|
+$26.4K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SM
Sabby Management
Miami Beach,
Florida
|
-$52.9K |
| 2 |
Geode Capital Management
Boston,
Massachusetts
|
-$51.8K |
| 3 |
UBS Group
Zurich,
Switzerland
|
-$228 |
| 4 |
CIAM
Caitong International Asset Management
Hong Kong
|
-$5 |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
AC
1
Armistice Capital
New York
| $157K | +$339K | +131,000 | New |
|
|
HCM
2
Heights Capital Management
San Francisco,
California
| $42.5K | +$91.6K | +35,400 | New |
|
|
BFM
3
Boothbay Fund Management
New York
| $32.6K | +$70.2K | +27,130 | New |
|
|
4
Bank of America
Charlotte,
North Carolina
| $12.4K | +$26.7K | +10,337 | New |
|
|
5
Vanguard Fiduciary Trust
Malvern,
Pennsylvania
| $12.3K | +$26.4K | +10,225 | New |
|
|
TRCT
6
Tower Research Capital (TRC)
New York
| $2.29K | +$460 | +178 | +10% |
|
|
LGM
7
L1 Global Manager
Melbourne,
| $144 | – | – | – |
|
|
CIAM
8
Caitong International Asset Management
Hong Kong
| $1 | -$5 | -2 | -67% |
|
|
SM
9
Sabby Management
Miami Beach,
Florida
| – | -$52.9K | -28,726 | Closed |
|
|
10
Geode Capital Management
Boston,
Massachusetts
| – | -$51.8K | -28,127 | Closed |
|
|
11
UBS Group
Zurich,
Switzerland
| – | -$228 | -124 | Closed |
|
BJDX Hedge Fund Activity: Q2 2026 in Review
8 of the 8,223 institutional investors tracked by Wall St. Rank reported a position in Bluejay Diagnostics (BJDX) for Q2 2026, worth a combined $259K — up 140% from $108K a quarter earlier.
Buyers outnumbered sellers: 5 funds opened new BJDX positions and 3 closed out — a net gain of 2 holders — while 1 added to existing stakes and 1 trimmed.
The largest buyer was Armistice Capital, opening a new position worth an estimated $339K. The largest seller was Sabby Management, exiting entirely with an estimated $52.9K sold.
- 8 institutional investors held Bluejay Diagnostics (BJDX) as of Q2 2026, up from 6 in Q1 2026.
- Funds reported $259K of Bluejay Diagnostics stock for Q2 2026, up 140% quarter-over-quarter.
- 5 funds opened new Bluejay Diagnostics positions in Q2 2026 and 3 closed out, a net change of +2 holders.
- The largest Bluejay Diagnostics buyer in Q2 2026 was Armistice Capital, an estimated $339K added.
- The largest Bluejay Diagnostics seller in Q2 2026 was Sabby Management, an estimated $52.9K sold.
Based on aggregated 13F filings for Q2 2026.