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

BioCardia, Inc.

BCDA · Nasdaq · CIK 0000925741 · Healthcare · Biotechnology

INSIDER SIGNAL

53.5 / 100

2 buyers · 24 purchase transaction lines · $159.0K gross purchase

WHY THIS SIGNAL?

Buyer breadthLow
Purchase sizeLow
RoleModerate
RecencyModerate
ConvictionStrong
Score anatomy

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

Cluster+14.0 / 35
Purchase size+9.2 / 25
Role+13.0 / 20
Recency+7.3 / 10
Conviction+10.0 / 10

What is holding the score back?

  • ⚠ Cluster breadth is moderate · 2 insider(s), not 4+
  • ⚠ Purchase size is modest relative to the model scale
  • ⚠ Role scores low · most senior buyer: President and CEO (CEO, chair and 10% owners score lowest)
  • ✓ Recent activity · latest purchase 2026-09-29

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
Altman PeterPresident and CEO
●●●●●●●●●○○●●●●●●●●●●●●●
STERTZER SIMON HDirector
●●
McClung DavidChief Financial Officer
○○
GILLIS EDWARD MSenior Vice President, Devices
○○
● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS2
PURCHASE CONCENTRATION65%Largest buyer: STERTZER SIMON H · $103.6K
CLUSTER BUYING · 15D2 insidersPeak activity: 2026-06-09–2026-06-23

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

SIGNAL HISTORY

53.5 / 100

Latest recorded score

↓ -0.3 ptsversus the previous recorded snapshot
  1. 54.2
  2. 54.0
  3. 53.9
  4. 53.8
  5. 53.5

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

Recent Form 4 activity

32Purchases
0Sales
12Other Form 4 lines
31SEC filings · 365 days
BUYING24 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER6 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDUnavailable

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
-1.8%
3M
+22.5%
6M
-9.9%
12M
-22.1%

Volatility & liquidity

Volatility
83.1%
Beta
0.55
Avg daily value
USD 348,495

Valuation

Market cap
USD 15.6M
P/E
—

Fundamentals

Profit margin
0.0%
ROE
-919.3%
Industry
Biotechnology

Market data

Price data up to: 2026-10-07 · Price source: OpenBB/yfinance · From SEC filings: ROE · Fiscal year ended: 2025-12-31 · From Yahoo Finance: Market cap, Profit margin · Status: PASS

Short interest

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

Shares short
619,162
Previous report
863,665
Avg daily volume
487,811
Days to cover
1.3

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
2026-09-29Altman PeterPurchase (P)Common Stock1,000USD 1.03USD 1,030SEC filing ↗
2026-09-23Altman PeterPurchase (P)Common Stock1,900USD 1.05USD 1,995SEC filing ↗
2026-09-03Altman PeterPurchase (P)Common Stock800USD 1.09USD 872SEC filing ↗
2026-08-17Altman PeterPurchase (P)Common Stock5,400USD 0.93USD 5,022SEC filing ↗
2026-08-13Altman PeterPurchase (P)Common Stock1,900USD 0.92USD 1,748SEC filing ↗
2026-07-29Altman PeterPurchase (P)Common Stock5,000USD 0.78USD 3,900SEC filing ↗
2026-07-17Altman PeterPurchase (P)Common Stock500USD 0.83USD 415SEC filing ↗
2026-07-15Altman PeterPurchase (P)Common Stock1,500USD 0.86USD 1,290SEC filing ↗
2026-07-14Altman PeterPurchase (P)Common Stock2,800USD 0.88USD 2,464SEC filing ↗
2026-07-10Altman PeterPurchase (P)Common Stock1,000USD 0.94USD 940SEC filing ↗
2026-07-09Altman PeterPurchase (P)Common Stock1,000USD 0.90USD 900SEC filing ↗
2026-07-08Altman PeterPurchase (P)Common Stock5,500USD 0.97USD 5,335SEC filing ↗
2026-07-08Altman PeterPurchase (P)Common Stock5,400USD 0.96USD 5,184SEC filing ↗
2026-06-23STERTZER SIMON HPurchase (P)Common Stock39,000USD 1.00USD 39,000SEC filing ↗
2026-06-22STERTZER SIMON HPurchase (P)Common Stock70,200USD 0.92USD 64,584SEC filing ↗

Form 4 evidence

44 transaction lines in the latest 365-day window; 243 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-29Altman PeterPurchase (P)Common Stock1,000USD 1.03USD 1,030SEC filing ↗
2026-09-23Altman PeterPurchase (P)Common Stock1,900USD 1.05USD 1,995SEC filing ↗
2026-09-03Altman PeterPurchase (P)Common Stock800USD 1.09USD 872SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-29Altman PeterPurchase (P)Common Stock1,000USD 1.03USD 1,030SEC filing ↗
2026-09-23Altman PeterPurchase (P)Common Stock1,900USD 1.05USD 1,995SEC filing ↗
2026-09-03Altman PeterPurchase (P)Common Stock800USD 1.09USD 872SEC filing ↗
2026-08-17Altman PeterPurchase (P)Common Stock5,400USD 0.93USD 5,022SEC filing ↗
2026-08-13Altman PeterPurchase (P)Common Stock1,900USD 0.92USD 1,748SEC filing ↗
2026-07-29Altman PeterPurchase (P)Common Stock5,000USD 0.78USD 3,900SEC filing ↗
2026-07-17Altman PeterPurchase (P)Common Stock500USD 0.83USD 415SEC filing ↗
2026-07-15Altman PeterPurchase (P)Common Stock1,500USD 0.86USD 1,290SEC filing ↗
2026-07-14Altman PeterPurchase (P)Common Stock2,800USD 0.88USD 2,464SEC filing ↗
2026-07-10Altman PeterPurchase (P)Common Stock1,000USD 0.94USD 940SEC filing ↗
2026-07-09Altman PeterPurchase (P)Common Stock1,000USD 0.90USD 900SEC filing ↗
2026-07-08Altman PeterPurchase (P)Common Stock5,500USD 0.97USD 5,335SEC filing ↗
2026-07-08Altman PeterPurchase (P)Common Stock5,400USD 0.96USD 5,184SEC filing ↗
2026-07-02McClung DavidTax withholding (F)Common Stock23,125USD 1.24USD 28,675SEC filing ↗
2026-07-02GILLIS EDWARD MTax withholding (F)Common Stock17,269USD 1.24USD 21,414SEC filing ↗
2026-07-02Altman PeterTax withholding (F)Common Stock54,606USD 1.24USD 67,711SEC filing ↗
2026-06-29McClung DavidAward / grant (A)Common Stock60,483USD 1.20USD 72,580SEC filing ↗
2026-06-29GILLIS EDWARD MAward / grant (A)Common Stock39,521USD 1.20USD 47,425SEC filing ↗
2026-06-29Altman PeterAward / grant (A)Common Stock110,625USD 1.20USD 132,750SEC filing ↗
2026-06-23STERTZER SIMON HPurchase (P)Common Stock39,000USD 1.00USD 39,000SEC filing ↗
2026-06-22STERTZER SIMON HPurchase (P)Common Stock70,200USD 0.92USD 64,584SEC filing ↗
2026-06-18Altman PeterPurchase (P)Common Stock800USD 0.96USD 768SEC filing ↗
2026-06-17Altman PeterPurchase (P)Common Stock1,500USD 0.85USD 1,275SEC filing ↗
2026-06-09Altman PeterPurchase (P)Common Stock5,000USD 0.85USD 4,250SEC filing ↗
2026-05-20Altman PeterPurchase (P)Common Stock1,500USD 0.92USD 1,380SEC filing ↗
2026-05-19Altman PeterPurchase (P)Common Stock200USD 0.95USD 190SEC filing ↗
2026-05-18Altman PeterPurchase (P)Common Stock5,700USD 0.92USD 5,244SEC filing ↗
2026-05-15Altman PeterPurchase (P)Common Stock5,100USD 1.02USD 5,202SEC filing ↗
2026-04-29Altman PeterPurchase (P)Common Stock5,000USD 1.11USD 5,550SEC filing ↗
2026-04-21Altman PeterPurchase (P)Common Stock400USD 1.23USD 492SEC 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 · —
TickerBCDA
CIK0000925741
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2836 Biological Products, (No Diagnostic Substances)
ExchangeNasdaq

Data coverage

Local Form 4 history243 transaction lines from 2020-01-13 to 2026-09-29
113 P purchase lines · 4 S sale lines · 126 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.