Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-19 · Built: 2026-10-19 · 中文

← United States · Coverage record

US · SEC FORM 4

HARVARD BIOSCIENCE INC

HBIO · Nasdaq · CIK 0001123494 · Healthcare · Medical Instruments & Supplies

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

5 Form 4 transaction lines observed in the same window
0 sales · 5 option, withholding, award, gift or other lines

Last qualifying purchase2026-03-17 · DENELSKY STEPHEN J · $48.7K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesNone
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

Insider activity timeline

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

AprMayJunJulAugSepOct
Eade Katherine A.Director
○
Snider WilliamDirector
○
DENELSKY STEPHEN JDirector
○
Gagnon Robert E.Director
○
Benson Seth BenjaminDirector
○
● Purchase▼ Sale○ Other

—

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-03-17 · DENELSKY STEPHEN J.

Recent Form 4 activity

4Purchases
0Sales
7Other Form 4 lines
10SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER5 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 has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

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

Shares short
44,996
Previous report
48,146
Avg daily volume
17,224
Days to cover
2.6

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
2026-03-17Snider WilliamPurchase (P)Common Stock8,475USD 4.85USD 41,104SEC filing ↗
2026-03-17DENELSKY STEPHEN JPurchase (P)Common Stock10,000USD 4.87USD 48,700SEC filing ↗
2026-03-16Snider WilliamPurchase (P)Common Stock12,525USD 4.99USD 62,500SEC filing ↗
2026-03-16Duke John DPurchase (P)Common Stock5,000USD 5.01USD 25,050SEC filing ↗
2024-06-13Green James WPurchase (P)Common Stock10,000USD 2.91USD 29,100SEC filing ↗
2024-06-06Green James WPurchase (P)Common Stock20,000USD 3.07USD 61,400SEC filing ↗
2023-08-17Green James WPurchase (P)Common Stock25,000USD 4.38USD 109,500SEC filing ↗
2023-03-15EDRICK ALAN IPurchase (P)Common Stock16,192USD 2.62USD 42,423SEC filing ↗
2023-03-15Green James WPurchase (P)Common Stock20,000USD 2.60USD 52,000SEC filing ↗
2023-03-14EDRICK ALAN IPurchase (P)Common Stock13,808USD 2.67USD 36,867SEC filing ↗
2023-03-14Green James WPurchase (P)Common Stock20,000USD 2.67USD 53,400SEC filing ↗
2022-12-01Green James WPurchase (P)Common Stock15,000USD 2.61USD 39,150SEC filing ↗
2022-11-30Green James WPurchase (P)Common Stock15,000USD 2.41USD 36,150SEC filing ↗
2022-08-26LOY BERTRANDPurchase (P)Common Stock9,291USD 3.41USD 31,682SEC filing ↗
2022-08-25LOY BERTRANDPurchase (P)Common Stock8,244USD 3.34USD 27,535SEC filing ↗

Form 4 evidence

11 transaction lines in the latest 365-day window; 187 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-06-09Eade Katherine A.Award / grant (A)Common Stock16,556USD 0.00USD 0SEC filing ↗
2026-06-09Snider WilliamAward / grant (A)Common Stock16,556USD 0.00USD 0SEC filing ↗
2026-06-09Gagnon Robert E.Award / grant (A)Common Stock16,556USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (11 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-06-09Eade Katherine A.Award / grant (A)Common Stock16,556USD 0.00USD 0SEC filing ↗
2026-06-09Snider WilliamAward / grant (A)Common Stock16,556USD 0.00USD 0SEC filing ↗
2026-06-09Gagnon Robert E.Award / grant (A)Common Stock16,556USD 0.00USD 0SEC filing ↗
2026-06-09DENELSKY STEPHEN JAward / grant (A)Common Stock16,556USD 0.00USD 0SEC filing ↗
2026-06-09Benson Seth BenjaminAward / grant (A)Common Stock16,556USD 0.00USD 0SEC filing ↗
2026-03-20Duke John DAward / grant (A)Common Stock75,000USD 0.00USD 0SEC filing ↗
2026-03-17Snider WilliamPurchase (P)Common Stock8,475USD 4.85USD 41,104SEC filing ↗
2026-03-17DENELSKY STEPHEN JPurchase (P)Common Stock10,000USD 4.87USD 48,700SEC filing ↗
2026-03-16Snider WilliamPurchase (P)Common Stock12,525USD 4.99USD 62,500SEC filing ↗
2026-03-16Duke John DPurchase (P)Common Stock5,000USD 5.01USD 25,050SEC filing ↗
2025-12-17Snider WilliamAward / grant (A)Common Stock110,000USD 0.00USD 0SEC 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 date2026-10-19
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerHBIO
CIK0001123494
SectorHealthcare
IndustryMedical Instruments & Supplies Yahoo Finance
SEC SIC3826 Laboratory Analytical Instruments
ExchangeNasdaq

Data coverage

Local Form 4 history187 transaction lines from 2020-01-01 to 2026-06-09
26 P purchase lines · 6 S sale lines · 155 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-19. Mapping status is an audit field and does not erase SEC filing evidence.