Bluejay Diagnostics
BJDX on Nasdaq. Market value $3m.
Should I look at this?
Look carefully before going further
Why it could be worth it
Nothing stands out yet.
What to watch out for
Read the warning sign in its own filings
This is not advice.
Who owns it
None of the long-term investors we follow own it. 8 funds in all.
Largest holders overall
- Armistice Capital$157,200New
- Heights Capital Management$42,480New
- Boothbay Fund Management$32,556New
- Bank of America$12,404New
- Vanguard Fiduciary Trust$12,270New
- Tower Research Capital LLC (TRC)$2,288Added
- L1 Global Manager Pty$144
- Caitong International Asset Management$1Cut
From 13F filings for the quarter ended 30 June 2026.
Big holders and activists
5 investors own more than 5%.
- Armistice Capital, LLCPassive investorat least 10.0%+5.0 pts(filed with 1 related holder)Since 30 June 2026
- Ayrton Capital LLCPassive investorat least 10.0%(filed with 2 related holders)Since 30 June 2026
- Mitchell P. KopinPassive investorat least 10.0%+5.0 pts(filed with 2 related holders)Since 3 June 2026
- SABBY MANAGEMENT, LLCPassive investorat least 4.9%(filed with 2 related holders)Since 31 December 2024
- Anson Funds Management LPPassive investorat least 1.4%(filed with 5 related holders)Since 31 December 2024
- L1 Capital Global Opportunities Master Fund, Ltd.Passive investorSold down below 5%Since 31 December 2024
- Braeden LichtiActivistSold down below 5%Since 2 June 2026
What they said
Since the filing of the Reporting Persons' Schedule 13D with the SEC on March 11, 2026, the Reporting Persons have disposed of all shares of common stock of the Issuer. As of June 2, 2026, the Reporting Persons no longer beneficially own any shares of the Issuer's Common Stock.
Read the filing - NorthStrive Fund II LPActivistSold down below 5%Since 2 June 2026
What they said
Since the filing of the Reporting Persons' Schedule 13D with the SEC on March 11, 2026, the Reporting Persons have disposed of all shares of common stock of the Issuer. As of June 2, 2026, the Reporting Persons no longer beneficially own any shares of the Issuer's Common Stock.
Read the filing
| Holder | Stake | Since | |
|---|---|---|---|
Armistice Capital, LLC Passive investor | at least 10.0%+5.0 pts (filed with 1 related holder) | 30 June 2026 | |
Ayrton Capital LLC Passive investor | at least 10.0% (filed with 2 related holders) | 30 June 2026 | |
Mitchell P. Kopin Passive investor | at least 10.0%+5.0 pts (filed with 2 related holders) | 3 June 2026 | |
SABBY MANAGEMENT, LLC Passive investor | at least 4.9% (filed with 2 related holders) | 31 December 2024 | |
Anson Funds Management LP Passive investor | at least 1.4% (filed with 5 related holders) | 31 December 2024 | |
L1 Capital Global Opportunities Master Fund, Ltd. Passive investor | Sold down below 5% | 31 December 2024 | |
Braeden Lichti Activist | Sold down below 5% | 2 June 2026 | What they saidSince the filing of the Reporting Persons' Schedule 13D with the SEC on March 11, 2026, the Reporting Persons have disposed of all shares of common stock of the Issuer. As of June 2, 2026, the Reporting Persons no longer beneficially own any shares of the Issuer's Common Stock. Read the filing |
NorthStrive Fund II LP Activist | Sold down below 5% | 2 June 2026 | What they saidSince the filing of the Reporting Persons' Schedule 13D with the SEC on March 11, 2026, the Reporting Persons have disposed of all shares of common stock of the Issuer. As of June 2, 2026, the Reporting Persons no longer beneficially own any shares of the Issuer's Common Stock. Read the filing |
From Schedule 13D and 13G filings: anyone owning more than 5% must file one.
What insiders did
In the last 12 months, 5 insiders bought $125,000 of shares on the open market.
- Wurth Douglas ClarkDirectorBought
- Date
- 14 March 2026
- Shares
- 12,500
- Price
- $2.00
- Value
- $25,000
- Dey IndranilPresident and CEO, DirectorBought
- Date
- 14 March 2026
- Shares
- 12,500
- Price
- $2.00
- Value
- $25,000
- CHASE DONALD RDirectorBought
- Date
- 14 March 2026
- Shares
- 12,500
- Price
- $2.00
- Value
- $25,000
- ZEIDMAN FRED SDirectorBought
- Date
- 14 March 2026
- Shares
- 12,500
- Price
- $2.00
- Value
- $25,000
- Dey SvetlanaDirectorBought
- Date
- 14 March 2026
- Shares
- 12,500
- Price
- $2.00
- Value
- $25,000
| Date | Who | Did | Shares | Price | Value |
|---|---|---|---|---|---|
| 14 March 2026 | Wurth Douglas Clark Director | Bought | 12,500 | $2.00 | $25,000 |
| 14 March 2026 | Dey Indranil President and CEO, Director | Bought | 12,500 | $2.00 | $25,000 |
| 14 March 2026 | CHASE DONALD R Director | Bought | 12,500 | $2.00 | $25,000 |
| 14 March 2026 | ZEIDMAN FRED S Director | Bought | 12,500 | $2.00 | $25,000 |
| 14 March 2026 | Dey Svetlana Director | Bought | 12,500 | $2.00 | $25,000 |
From Form 4 filings: insiders must report trades in their own company's shares within two days.
Warning signs in its filings
Problems the company itself reported to the SEC, in its own words.
1 serious warning sign in Bluejay Diagnostics’ filings.
We look for five warning signs: doubt it can keep going, weak checks on its own accounts, a notice that its past accounts can't be relied on, a change of auditor, and one customer bringing in a big share of sales. We don't check lawsuits, investigations or debt yet.
We checked the auditor's report, internal controls, restatement notices, auditor changes and big customers in the 10-K filed 6 Mar 2026, plus the 10-Q filed 12 Aug 2026 and 11 later 8-Ks.
Doubt it can keep going
SeriousThe company or its auditor warned it may not have enough money to last the next year.
“These financial results and financial position, and the Company’s expected forward-looking outlook of significant negative cash flow in the future, raise substantial doubt with respect to its ability to continue as a going concern.”
Show the full paragraph
The Company had cash and cash equivalents of $ 9,598,916 and current liabilities of $ 2,116,641 as of June 30, 2026. The Company has incurred net losses and negative cash flows from operations since its inception and has an accumulated deficit of $ 45,760,521 as of June 30, 2026. The Company expects that its net cash used in operating activities will continue to be negative over at least the next several years as it attempts to produce product capable of meeting analytical validation and clinical validation and conducts clinical trial work and, if such production and trials are successful, prepares an FDA submission. These financial results and financial position, and the Company’s expected forward-looking outlook of significant negative cash flow in the future, raise substantial doubt with respect to its ability to continue as a going concern. The Company expects that it will be in position to submit a 510(k) regulatory application to the FDA for Symphony during the first half of 2027, assuming that it is able to generate sufficient clinical trial results to support such a submission. If the Company fails to obtain sufficient future financing, its clinical trials and targeted FDA submission timeline could be delayed, and it could be forced to abandon such activities entirely and cease operations, with the possible loss of such properties or assets. If the Company is unable to obtain additional financing as it continues to generate negative cash flow, its board of directors could determine to cause the Company to undertake a process of liquidation under Chapter 7 of applicable U.S. bankruptcy laws, or otherwise seek other protection under such laws. In such event, holders of shares of the Company’s common stock could recoup little, if any, value in such process. The Company currently estimates cash resources will be sufficient to fund its operations through the second quarter of 2027.
From the 10-Q filed 12 August 2026, Part I, Item 1. Financial Statements. Read it in the filing
A 10-K is the yearly report every US company files with the SEC. An 8-K is a short notice of a big event.
The deep dive
Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.
- What the business is worth, as a range, and the margin of safety at today’s price
- Prices to start buying, buy, and buy hard
- The three things that would make this a mistake
- Every number footnoted to the filing it came from
Your first deep dive is free.
Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.