Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Bluejay Diagnostics, Inc.

BJDX · Nasdaq · CIK 0001704287 · Healthcare · Medical Devices

INSIDER SIGNAL

32.8 / 100

1 buyers · 1 purchase transaction lines · $96.7K gross purchase

WHY THIS SIGNAL?

Buyer breadthLow
Purchase sizeLow
RoleModerate
RecencyLow
ConvictionModerate
Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+7.0 / 35
Purchase size+5.0 / 25
Role+14.0 / 20
Recency+1.9 / 10
Conviction+4.9 / 10

What is holding the score back?

  • ⚠ Cluster breadth is moderate · 1 insider(s), not 4+
  • ⚠ Purchase size is modest relative to the model scale
  • ⚠ Role scores low · most senior buyer: TenPercentOwner (CEO, chair and 10% owners score lowest)
  • ⚠ Purchase activity is becoming less recent
  • ⚠ Buying conviction is reduced by concurrent selling

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
HRT FINANCIAL LPTenPercentOwner
●▼
Dey IndranilPresident and CEO
○
● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS1
PURCHASE CONCENTRATION100%Largest buyer: HRT FINANCIAL LP · $96.7K
CLUSTER BUYING · 15D1 insiderPeak activity: 2026-07-09–2026-07-09

Roles in the peak window: TenPercentOwner. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

32.8 / 100

Latest recorded score

↓ -0.1 ptsversus the previous recorded snapshot
  1. 33.2
  2. 33.1
  3. 33.0
  4. 32.9
  5. 32.8

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

1Purchases
1Sales
1Other Form 4 lines
2SEC filings · 365 days
BUYING1 qualifying P line(s) · 180 days
SELLING1 sale line(s) · context only
OTHER1 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
-18.4%
3M
-32.5%
6M
-53.7%
12M
-89.0%

Volatility & liquidity

Volatility
194.1%
Beta
—
Avg daily value
USD 3.0M

Valuation

Market cap
—
P/E
—

Fundamentals

Profit margin
—
ROE
-114.6%
Industry
Medical Devices

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: ROE · Fiscal year ended: 2025-12-31 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
143,737
Previous report
131,482
Avg daily volume
728,412
Days to cover
≤ 1.0

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-07-09HRT FINANCIAL LPPurchase (P)Common Stock64,047USD 1.51USD 96,711SEC filing ↗
2023-12-13Dey SvetlanaPurchase (P)Common Stock500USD 3.07USD 1,535SEC filing ↗
2023-12-13Dey IndranilPurchase (P)Common Stock500USD 3.27USD 1,635SEC filing ↗
2023-03-28Dey IndranilPurchase (P)Common Stock2,000USD 0.44USD 880SEC filing ↗
2023-03-27Dey IndranilPurchase (P)Common Stock8,000USD 0.44USD 3,520SEC filing ↗
2023-03-24Dey SvetlanaPurchase (P)Common Stock10,000USD 0.44USD 4,400SEC filing ↗
2022-08-26Fisher Kenneth RPurchase (P)Common Stock20,000USD 1.03USD 20,600SEC filing ↗
2022-04-25Fisher Kenneth RPurchase (P)Common Stock20,000USD 0.99USD 19,800SEC filing ↗
2022-03-17Kinder Gordon WinstonPurchase (P)Common Stock2,500USD 1.16USD 2,900SEC filing ↗
2022-03-17Dey SvetlanaPurchase (P)Common Stock10,000USD 1.18USD 11,800SEC filing ↗
2022-03-17Wurth Douglas ClarkPurchase (P)Common Stock40,000USD 1.18USD 47,200SEC filing ↗
2022-03-16Wurth Douglas ClarkPurchase (P)Common Stock60,000USD 1.09USD 65,400SEC filing ↗
2022-03-16Kinder Gordon WinstonPurchase (P)Common Stock5,000USD 1.02USD 5,100SEC filing ↗
2022-03-15Kinder Gordon WinstonPurchase (P)Common Stock500USD 0.91USD 455SEC filing ↗
2022-03-14Kinder Gordon WinstonPurchase (P)Common Stock10,500USD 0.95USD 9,975SEC filing ↗

Form 4 evidence

3 transaction lines in the latest 365-day window; 29 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-17Dey IndranilAward / grant (A)Common Stock28,000USD 0.00USD 0SEC filing ↗
2026-07-10HRT FINANCIAL LPSale (S)Common Stock34,938USD 1.40USD 48,913SEC filing ↗
2026-07-09HRT FINANCIAL LPPurchase (P)Common Stock64,047USD 1.51USD 96,711SEC filing ↗
Show recent Form 4 evidence (3 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-17Dey IndranilAward / grant (A)Common Stock28,000USD 0.00USD 0SEC filing ↗
2026-07-10HRT FINANCIAL LPSale (S)Common Stock34,938USD 1.40USD 48,913SEC filing ↗
2026-07-09HRT FINANCIAL LPPurchase (P)Common Stock64,047USD 1.51USD 96,711SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerBJDX
CIK0001704287
SectorHealthcare
IndustryMedical Devices Yahoo Finance
SEC SIC3841 Surgical & Medical Instruments & Apparatus
ExchangeNasdaq

Data coverage

Local Form 4 history29 transaction lines from 2022-03-14 to 2026-08-17
15 P purchase lines · 1 S sale lines · 13 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.