Bluejay Diagnostics, Inc. (BJDX) Ownership
BJDX ownership summary
as of October 18, 2026- Institutions
- 9.8% of shares outstanding
- Insiders
- 2.03% of shares outstanding
- Shares outstanding
- 4.5M
- Float
- 4.4M shares available to trade
- Short interest
- 3.26% 144K shares short
- Days to cover
- 0.05 short interest up 9.3% vs prior month
- Institutions 9.79%
- Insiders 2.03%
- Other investors 88.18%
BJDX top institutional holders
12 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Armistice Capital, LLC | 2.93% | 131K | $97,595 | +131,000 (0.0%) | June 30, 2026 |
| 2 | Heights Capital Management Inc | 0.79% | 35K | $26,373 | +35,400 (0.0%) | June 30, 2026 |
| 3 | BOOTHBAY FUND MANAGEMENT, LLC | 0.61% | 27K | $20,212 | +27,130 (0.0%) | June 30, 2026 |
| 4 | Bank of America Corp | 0.23% | 10K | $7,701 | +10,337 (0.0%) | June 30, 2026 |
| 5 | Vanguard Fiduciary Trust Co | 0.23% | 10K | $7,618 | +10,225 (0.0%) | June 30, 2026 |
| 6 | Tower Research Capital LLC | 0.04% | 1,907 | $1,421 | +178 (+10.3%) | June 30, 2026 |
| 7 | L1 Global Manager Pty Ltd | <0.01% | 120 | $89 | — | June 30, 2026 |
| 8 | Caitong International Asset Management Co., Limited. | 0.00% | 1 | $1 | −2 (−66.7%) | June 30, 2026 |
| 9 | Sabby Management LLC | 0.00% | — | — | −28,726 (−100.0%) | June 30, 2026 |
| 10 | Geode Capital Management, LLC | 0.00% | — | — | −28,127 (−100.0%) | June 30, 2026 |
| 11 | Meteora Capital, LLC | 0.00% | — | — | — | March 31, 2026 |
| 12 | UBS Group AG | 0.00% | — | — | −124 (−100.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 12, 6 holders added 214K shares and 4 cut 57K.
BJDX top mutual fund and ETF holders
2 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Fidelity Extended Market Index | 0.89% | 40K | $29,503 | +33,929 (+598.1%) | August 31, 2026 |
| 2 | Fidelity Series Total Market Index | <0.01% | 183 | $136 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
BJDX insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2022-04-25 | Kenneth R Fisher | Buy | $7,920.00 | 2 | $15,840 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
BJDX shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns BJDX
Institutional investors own 9.8% of Bluejay Diagnostics's shares and insiders 2.03%. The largest holder is Armistice Capital, LLC with 2.93% of the shares (131K), as of June 30, 2026. Among the top 12 institutions, 6 added shares and 4 reduced their stake in the latest filings. Short interest is 3.26% of the float, or 0.05 days of average trading volume. The share count rose 2,167.7% since 2020.
Related: BJDX key metrics. See the BJDX stock overview for the latest quote and news.
BJDX ownership FAQ
Who owns the most Bluejay Diagnostics stock?
The largest shareholders of Bluejay Diagnostics are Armistice Capital, LLC (2.93%), Heights Capital Management Inc (0.79%), BOOTHBAY FUND MANAGEMENT, LLC (0.61%), Bank of America Corp (0.23%), Vanguard Fiduciary Trust Co (0.23%).
What percentage of Bluejay Diagnostics is owned by institutions?
Institutions hold 9.8% of Bluejay Diagnostics's shares outstanding; insiders hold 2.03%.
Which funds own Bluejay Diagnostics?
The largest fund holders of Bluejay Diagnostics are Fidelity Extended Market Index (0.89%), Fidelity Series Total Market Index (<0.01%).
What is Bluejay Diagnostics's short interest?
144K shares of Bluejay Diagnostics were sold short, 3.26% of the float; at the average daily volume it would take 0.05 days to cover.
Are insiders buying or selling Bluejay Diagnostics?
Of the latest 1 reported insider transactions in Bluejay Diagnostics (since April 25, 2022), 1 were purchases and 0 were sales.
How many shares of Bluejay Diagnostics are outstanding?
Bluejay Diagnostics has 4.5M shares outstanding, of which 4.4M are in the public float.