Bluejay Diagnostics, Inc.
Bluejay Diagnostics, Inc. (BJDX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · BJDX · as of Sep 30, 2025
Ownership Breakdown
4
Institutional Holders
▼ 1 vs Q2
$142,659
Total Inst. Value
▼ $27,614 vs Q2
453,541
Shares Outstanding
freeFloat 86.85%
93,855
13F Shares Held
▼ 5,140 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
BJDX largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 6 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
DRW SECURITIES, LLC surgical & medical instruments & apparatus | 59.8K | 3.80% | 3.80% | $90.84M | Nov 14, 2025 | NEW |
SABBY MANAGEMENT, LLC surgical & medical instruments & apparatus | 29.6K | 1.88% | 1.88% | $45.03M | Nov 14, 2025 | ▼ 66.4K |
TOWER RESEARCH CAPITAL LLC (TRC) surgical & medical instruments & apparatus | 4.4K | 28.25% | 28.25% | $6.76M | Nov 14, 2025 | ▲ 2.2K |
BANK OF AMERICA CORP /DE/ surgical & medical instruments & apparatus | 12 | 0.08% | 0.08% | $18,000 | Feb 3, 2026 | ▲ 7 |
CITIGROUP INC surgical & medical instruments & apparatus | 0 | 0.00% | 0.00% | $0 | Nov 10, 2025 | EXIT |
UBS GROUP AG surgical & medical instruments & apparatus | 0 | 0.00% | 0.00% | $0 | Nov 13, 2025 | EXIT |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
2
Increased
+2.2K shares1
New Positions
first time holders1
Decreased
−66.4K shares2
Sold Out
fully exitedNet shares change (top 50)
64.2K
+2.2K / −66.4K
Net new holders
+0
1 new / 2 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
BJDX insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
2
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Wurth Douglas Clark director | Mar 14, 2026 | Purchase | 12,500 | $2.00 | $25.0K | 12.6K | Form 4 ↗ |
Dey Indranil President and CEO | Mar 14, 2026 | Purchase | 12,500 | $2.00 | $25.0K | 12.5K | Form 4 ↗ |
CHASE DONALD R director | Mar 14, 2026 | Purchase | 12,500 | $2.00 | $25.0K | 12.5K | Form 4 ↗ |
ZEIDMAN FRED S director | Mar 14, 2026 | Purchase | 12,500 | $2.00 | $25.0K | 12.5K | Form 4 ↗ |
Dey Svetlana director | Mar 14, 2026 | Purchase | 12,500 | $2.00 | $25.0K | 12.5K | Form 4 ↗ |
Dey Svetlana director | Dec 13, 2023 | Purchase | 500 | $3.07 | $1.5K | 1.5K | Form 4 ↗ |
Dey Indranil President and CEO | Dec 13, 2023 | Purchase | 500 | $3.27 | $1.6K | 28.5K | Form 4 ↗ |
Dey Svetlana director | Mar 24, 2023 | Purchase | 10,000 | $0.44 | $4.4K | 47.5K | Form 4 ↗ |
Dey Indranil President and CEO | Mar 28, 2023 | Purchase | 2,000 | $0.44 | $880 | 660.5K | Form 4 ↗ |
Dey Indranil President and CEO | Mar 27, 2023 | Purchase | 8,000 | $0.44 | $3.5K | 558.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Bluejay Diagnostics, Inc. (BJDX) is primarily owned by institutional investors, who hold approximately 20.7% of total shares outstanding. Company insiders own approximately 13.15%, while retail and public investors account for the remaining 66.16%.
The largest institutional shareholder of Bluejay Diagnostics, Inc. is DRW SECURITIES, LLC, holding approximately 59,767 shares — equal to 3.80% of outstanding shares — as of September 30, 2025.
A total of 4 institutional investors currently hold BJDX stock, with a combined institutional value of approximately $142,659 as of the most recent 13F filing period.
Frequently asked questions
BJDX ownershipBluejay Diagnostics, Inc. (BJDX) is primarily owned by institutional investors, who hold approximately 20.7% of shares. The largest shareholder is DRW SECURITIES, LLC with a 3.80% stake. Company insiders hold 13.15%. Data sourced from SEC Form 13F as of September 30, 2025.