As of November 6, 2026, Bluejay Diagnostics, Inc. is a publicly traded company (Nasdaq: BJDX); its largest reported holder is Armistice Capital, with 9.99% on Schedule 13G of August 14, 2026, then Ayrton Capital LLC (9.99%). The largest insider holding is HRT Financial LP, a 10% owner, with 92,055 shares (2.1% of shares outstanding), per Form 4 of July 13, 2026 (Schedule 13G, August 14, 2026).
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Is Bluejay Diagnostics, Inc. a real, registered company?
- Bluejay Diagnostics, Inc. files with the SEC under CIK 1704287 (its SEC filings).
- Its shares are listed under the ticker BJDX on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Acton, Massachusetts, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under Bluejay Diagnostics, Inc. in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Armistice Capital (filed 2026-08-14).
Who are Bluejay Diagnostics, Inc.'s owners and officers?
Bluejay Diagnostics, Inc.: incorporated in Delaware; business address in Acton, Massachusetts; industry Surgical & Medical Instruments & Apparatus (Schedule 13G, 2026-08-14).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-08-14 | Armistice Capital, LLC | 9.99% |
| Schedule 13G, 2026-08-13 | Ayrton Capital LLC | 9.99% |
| Schedule 13G, 2026-06-05 | Mitchell P. Kopin | 9.99% |
| Schedule 13D/A, 2026-06-02 | Braeden Lichti | 0% |
| Schedule 13D/A, 2026-06-02 | Northstrive Fund Ii LP | 0% |
| Schedule 13G/A, 2026-05-15 | Armistice Capital, LLC | 4.99% |
| Schedule 13D, 2026-03-11 | Northstrive Fund Ii LP | 3.65% |
| Schedule 13D, 2026-03-11 | Northstrive Fund Ii LP | 3.65% |
| Schedule 13D, 2026-03-11 | Braeden Lichti | 3.65% |
| Schedule 13G, 2026-02-18 | Armistice Capital, LLC | 9.99% |
| Schedule 13G, 2026-02-17 | Armistice Capital, LLC | 9.99% |
| Schedule 13G/A, 2026-02-13 | Mitchell P. Kopin | 4.99% |
Questions about who owns Bluejay Diagnostics, Inc.
Who owns Bluejay Diagnostics, Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Bluejay Diagnostics, Inc.: Armistice Capital, LLC (9.99%, Schedule 13G, filed 2026-08-14), Ayrton Capital LLC (9.99%, Schedule 13G, filed 2026-08-13) and Mitchell P. Kopin (9.99%, Schedule 13G, filed 2026-06-05).
Who are the largest shareholders of Bluejay Diagnostics, Inc.?
By the share each holder's latest filing reports, the largest holders of Bluejay Diagnostics, Inc. on this page are Armistice Capital, LLC (9.99%), Ayrton Capital LLC (9.99%) and Mitchell P. Kopin (9.99%).
When did Armistice Capital, LLC buy into Bluejay Diagnostics, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Armistice Capital, LLC on this page is the Schedule 13G, filed 2026-02-17, reporting 9.99%; its latest, Schedule 13G filed 2026-08-14, reports 9.99%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on Bluejay Diagnostics, Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
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Which insiders own Bluejay Diagnostics, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- HRT Financial LP, a 10% owner: 92,055 shares (2.1% of shares outstanding) (Form 4, 2026-07-13).
- , the chief executive and president: 40,649 shares (0.91% of shares outstanding), 40,522 held directly and 127 indirectly (Form 4, 2026-08-18).
- , a director: 12,628 shares (0.28% of shares outstanding), 12,501 held directly and 127 indirectly (Form 4, 2026-05-18).
- , a director: 12,608 shares (0.28% of shares outstanding) (Form 4, 2026-05-18).
- , a director: 12,525 shares (0.28% of shares outstanding) (Form 4, 2026-05-18).
Shares outstanding: 4,468,051 as of 2026-08-07, from the company's latest SEC cover page.
How much has Bluejay Diagnostics, Inc. raised?
No fundraising or offering filing from Bluejay Diagnostics, Inc. is on file with us.
Keep reading
More on Bluejay Diagnostics, Inc. and the records around it.
Bluejay Diagnostics, Inc. elsewhere on the record
- 5%+ stake filings Aug 2026
Companies that share a holder
- Northstrive Fund II LP also filed stake reports on 2 other companies: enVVeno Medical Corp (Feb 2026), ENVERIC BIOSCIENCES, INC. (Dec 2025)
- Braeden Lichti also filed stake reports on 3 other companies: enVVeno Medical Corp (Sep 2026), PMGC Holdings Inc. (Jun 2026), ENVERIC BIOSCIENCES, INC. (Dec 2025)
- Ayrton Capital LLC also filed stake reports on 31 other companies: BTC Digital Ltd. (Aug 2026), DEFSEC Technologies Inc. (Aug 2026), ENVERIC BIOSCIENCES, INC. (Aug 2026)
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