BLUEJAY DIAGNOSTICS INC BJDX
COM NEW · Common Stock · CUSIP 095633608
- SectorHealth care
- IndustrySurgical & Medical Instruments & Apparatus
- HeadquartersActon, MA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 4.5m as of 2026-08-07, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $1.20.
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q4 2025 | 1 |
| Q1 2026 | 6 |
| Q2 2026 | 8 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q1 2026 | 6 | 1 |
| Q2 2026 | 6 | 4 |
Biggest buyers
| ARMISTICE CAPITAL, LLC | New | +131.0k |
| HEIGHTS CAPITAL MANAGEMENT, INC | New | +35.4k |
| BOOTHBAY FUND MANAGEMENT, LLC | New | +27.1k |
| BANK OF AMERICA CORP /DE/ | New | +10.3k |
| VANGUARD FIDUCIARY TRUST CO | New | +10.2k |
| Tower Research Capital LLC (TRC) | Added | +178 |
Biggest sellers
| SABBY MANAGEMENT, LLC | Sold out | -28.7k |
| GEODE CAPITAL MANAGEMENT, LLC | Sold out | -28.1k |
| UBS Group AG | Sold out | -124 |
| Caitong International Asset Management Co., Ltd | Reduced | -2 |
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| ARMISTICE CAPITAL, LLC 13G · institution +5.0 pts · filed 2026-08-14 | 10.0% |
| Ayrton Capital LLC 13G · institution new · filed 2026-08-13 | 10.0% |
| INTRACOASTAL CAPITAL, LLC 13G · passive investor new · filed 2026-06-05 | 10.0% |
Fell to 5% or below in the last year: Braeden Lichti (0.0%, 2026-06-02), NORTHSTRIVE FUND II LP (0.0%, 2026-06-02)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 5 | $25.0k | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-07-10 | HRT FINANCIAL LP 10% owner | Sold | $48.9k34.9k shares |
| 2026-07-09 | HRT FINANCIAL LP 10% owner | Bought | $96.7k64.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| ARMISTICE CAPITAL, LLC 0.00% of their portfolio | 131.0k $157.2k | New |
| HEIGHTS CAPITAL MANAGEMENT, INC 0.01% of their portfolio | 35.4k $42.5k | New |
| BOOTHBAY FUND MANAGEMENT, LLC 0.00% of their portfolio | 27.1k $32.6k | New |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 10.3k $12.4k | New |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 10.2k $12.3k | New |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 1.9k $2.3k | Added +178 |
| L1 Global Manager Pty Ltd 0.00% of their portfolio | 120 $144 | Unchanged |
| Caitong International Asset Management Co., Ltd 0.00% of their portfolio | 1 $1 | Reduced -2 |