Bluejay Diagnostics, Inc. (BJDX) Insider Trading
Over the last 3 months, BJDX insiders made 1 open-market buy and 1 sale, a net purchase of $48K (SEC Form 4). Over the last 6 months, 1 institutions increased and 2 reduced their position (13F).
Insider Activity
Sentiment
66/100
Buys (3m)
1
Sells (3m)
1
Net (3m)
$47.8K
Insiders buying
Insider trades by month Buys Sells
Apr
Sep
Mar
Dec
May
Jul
Context3-month price -51.6%Institutions reducing (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 18, 2026 | Wurth Douglas Clarkdirector | Grant | 100,000 | $2.08 |
| Aug 18, 2026 | Dey Svetlanadirector | Grant | 100,000 | $2.08 |
| Aug 18, 2026 | Dey Indranildirector, officer: President and CEO | Grant | 28,000 | — |
| Aug 18, 2026 | CHASE DONALD Rdirector | Grant | 100,000 | $2.08 |
| Aug 18, 2026 | ZEIDMAN FRED Sdirector | Grant | 100,000 | $2.08 |
| Jul 13, 2026 | HRT FINANCIAL LP10 percent owner | Sell | 34,938 | $1.40 |
| Jul 13, 2026 | HRT FINANCIAL LP10 percent owner | Buy | 64,047 | $1.51 |
| May 18, 2026 | CHASE DONALD Rdirector | Buy | 12,500 | $2.00 |
| May 18, 2026 | Wurth Douglas Clarkdirector | Buy | 12,500 | $2.00 |
| May 18, 2026 | Dey Svetlanadirector | Buy | 12,500 | $2.00 |
| May 18, 2026 | ZEIDMAN FRED Sdirector | Buy | 12,500 | $2.00 |
| May 18, 2026 | Dey Indranildirector, officer: President and CEO | Buy | 12,500 | $2.00 |
| Dec 14, 2023 | Dey Svetlanadirector | Buy | 500 | $3.07 |
| Dec 14, 2023 | Dey Indranildirector, 10 percent owner, officer: President and CEO | Buy | 500 | $3.27 |
| Mar 31, 2023 | Dey Indranildirector, officer: President and CEO | Buy | 2,000 | $0.44 |
| Mar 31, 2023 | Dey Svetlanadirector | Buy | 10,000 | $0.44 |
| Mar 31, 2023 | Dey Indranildirector, officer: President and CEO | Buy | 8,000 | $0.44 |
| Mar 28, 2023 | Dey Indranildirector, officer: President and CEO | Grant | 8,000 | $0.44 |
| Mar 28, 2023 | Dey Indranildirector, officer: President and CEO | Grant | 2,000 | $0.44 |
| Mar 24, 2023 | Dey Svetlanadirector | Grant | 10,000 | $0.44 |
| Feb 16, 2023 | Gemignani Gary Gdirector | Grant | 27,500 | $0.44 |
| Feb 13, 2023 | Dey Svetlanadirector | Grant | 27,500 | $0.44 |
| Feb 13, 2023 | Dey Indranildirector, officer: President and CEO | Grant | 159,090 | $0.44 |
| Feb 13, 2023 | Dey Indranildirector, officer: President and CEO | Tax | 55,612 | $0.44 |
| Feb 13, 2023 | Fisher Kenneth Rofficer: Chief Financial Officer | Grant | 112,500 | $0.44 |
| Feb 13, 2023 | Fisher Kenneth Rofficer: Chief Financial Officer | Tax | 39,316 | $0.44 |
| Feb 13, 2023 | Wurth Douglas Clarkdirector | Grant | 27,500 | $0.44 |
| Feb 13, 2023 | ZEIDMAN FRED Sdirector | Grant | 27,500 | $0.44 |
| Feb 13, 2023 | CHASE DONALD Rdirector | Grant | 27,500 | $0.44 |
| Sep 7, 2022 | Fisher Kenneth Rdirector: Chief Financial Officer | Buy | 20,000 | $1.03 |
Source: BJDX SEC Form 4 filings, latest Aug 18, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their BJDX positions over the last 6 months (SEC Form 13F).
Increased
1
New positions
3
Reduced
2
Sold out
6
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| SABBY MANAGEMENT, LLC | New Position | 29K | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 28K | May 15, 2026 |
| TOWER RESEARCH CAPITAL LLC (TRC) | Reduced | 2K | May 15, 2026 |
| UBS GROUP AG | New Position | 124 | May 5, 2026 |
| L1 Global Manager Pty Ltd | Reduced | 120 | May 15, 2026 |
| CAITONG INTERNATIONAL ASSET MANAGEMENT CO., LTD | New Position | 3 | May 11, 2026 |
| SABBY MANAGEMENT, LLC | Sold Out | 0 | May 15, 2026 |
| Caitong International Asset Management Co., Ltd | Sold Out | 0 | May 11, 2026 |
| UBS Group AG | Sold Out | 0 | May 5, 2026 |
| Tower Research Capital LLC (TRC) | Sold Out | 0 | May 15, 2026 |
| L1 Global Manager Pty Ltd | Sold Out | 0 | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Sold Out | 0 | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.