Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in BJDX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | SABBY MANAGEMENT, LLC | 29K | $53K | — | 6.334% | 0.93% |
| 2 | GEODE CAPITAL MANAGEMENT, LLC | 28K | $52K | +174.3% | 6.202% | 0.00% |
| 3 | Tower Research Capital LLC (TRC) | 2K | $3K | -61.0% | 0.381% | 0.00% |
| 4 | UBS Group AG | 124 | $228 | — | 0.027% | 0.00% |
| 5 | L1 Global Manager Pty Ltd | 120 | $220 | -75.2% | 0.026% | 0.00% |
| 6 | Caitong International Asset Management Co., Ltd | 3 | $6 | — | 0.001% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in BJDX — a direct measure of their conviction.
Filings activity in BJDX during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 6 | 33% | 4.88% | 0.18 pp | $0M | 3.6% |
| Q4 2025 | 9 | +200% | 5.06% | +2.72 pp | $0M | +117% |
| Q3 2025 | 3 | 50% | 2.34% | 5.34 pp | $0M | 70% |
| Q2 2025 | 6 | +20% | 7.68% | +7.25 pp | $0M | +1673% |
| Q1 2025 | 5 | +0.0% | 0.43% | 0.12 pp | $0M | 21% |
| Q4 2024 | 5 | 64% | 0.55% | 5.04 pp | $0M | 90% |
| Q3 2024 | 14 | +133% | 5.59% | +0.78 pp | $0M | +16% |
| Q2 2024 | 6 | — | 4.81% | — | $0M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Latest Form 4 transactions by company officers and directors. Insider buys are widely viewed as the highest-conviction signal because executives are risking personal capital.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Mar 14, 2026 | Wurth Douglas Clark | Buy | 13K | $2.00 | $25K |
Quick answers to the most common questions about buying BJDX stock.
Based on Q1 2026 13F filings, institutional ownership of Bluejay Diagnostics, Inc. stands at 4.9%, held across 6 reporting institutions.
SABBY MANAGEMENT, LLC is the largest reported institutional holder of BJDX, with approximately 28,726 shares worth $0.00B as of Q1 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of BJDX.
Our composite Smart Money Score for BJDX is 28 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
3 institutions opened new positions in BJDX during Q1 2026, while 6 fully exited. 2 added to existing positions and 1 trimmed.
BJDX institutional ownership fell by 0.18 percentage points quarter-over-quarter, with a net change of -3 holders.
The top 10 institutions account for 100.0% of all reported 13F value in BJDX, and the top 25 account for 100.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Bluejay Diagnostics, Inc. (BJDX) Institutional Ownership