Stock Trading Canary

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

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US · SEC FORM 4

GENELUX Corp

GNLX · Nasdaq · CIK 0001231457 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

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

22 Form 4 transaction lines observed in the same window
13 sales · 9 option, withholding, award, gift or other lines

Last qualifying purchase2024-05-29 · Tyree James L · value unavailable

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesModerate
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.

Insider activity timeline

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

AprMayJunJulAugSepOct
Zindrick ThomasPresident and CEO
▼○▼▼
Yu YongChief Scientific Officer
▼○▼▼
Cappello JosephChief Technical Officer
▼○▼▼
Thomas JohnDirector
▼○
Smither John WDirector
○▼
Smalling RalphHead of Regulatory
▼▼
● Purchase▼ Sale○ Other

Showing the six most active owners; 4 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

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

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: 2024-05-29 · Tyree James L.

Recent Form 4 activity

0Purchases
25Sales
9Other Form 4 lines
32SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING13 sale line(s) · context only
OTHER9 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
4,362,110
Previous report
4,096,285
Avg daily volume
213,487
Days to cover
20.4

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
2024-05-29Zindrick ThomasPurchase (P)Common Stock200,000USD —USD —SEC filing ↗
2024-05-29Zak Lourie S.Purchase (P)Common Stock31,250USD —USD —SEC filing ↗
2024-05-29Yu YongPurchase (P)Common Stock2,500USD —USD —SEC filing ↗
2024-05-29Tyree James LPurchase (P)Common Stock6,250USD —USD —SEC filing ↗
2024-05-29Thomas JohnPurchase (P)Common Stock2,500USD —USD —SEC filing ↗
2024-05-29Smither John WPurchase (P)Common Stock6,250USD —USD —SEC filing ↗
2024-05-29Smalling RalphPurchase (P)Common Stock1,250USD —USD —SEC filing ↗
2024-05-29Ryder SeanPurchase (P)Common Stock10,000USD —USD —SEC filing ↗
2024-05-29Mirabelli MaryPurchase (P)Common Stock8,000USD —USD —SEC filing ↗
2023-01-26Zhang QianPurchase (P)Common Stock200USD 6.25USD 1,250SEC filing ↗

Form 4 evidence

34 transaction lines in the latest 365-day window; 224 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-31Zindrick ThomasSale (S)Common Stock34,463USD 2.67USD 92,016SEC filing ↗
2026-08-31Yu YongSale (S)Common Stock9,683USD 2.75USD 26,628SEC filing ↗
2026-08-31Cappello JosephSale (S)Common Stock10,257USD 2.74USD 28,104SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-31Zindrick ThomasSale (S)Common Stock34,463USD 2.67USD 92,016SEC filing ↗
2026-08-31Yu YongSale (S)Common Stock9,683USD 2.75USD 26,628SEC filing ↗
2026-08-31Cappello JosephSale (S)Common Stock10,257USD 2.74USD 28,104SEC filing ↗
2026-08-04Zindrick ThomasSale (S)Common Stock3,023USD 2.95USD 8,918SEC filing ↗
2026-08-04Yu YongSale (S)Common Stock653USD 2.94USD 1,920SEC filing ↗
2026-08-04Cappello JosephSale (S)Common Stock653USD 2.95USD 1,926SEC filing ↗
2026-07-01Smither John WSale (S)Common Stock12,000USD 2.91USD 34,920SEC filing ↗
2026-06-16Zindrick ThomasAward / grant (A)Common Stock730,601USD 0.00USD 0SEC filing ↗
2026-06-16Yu YongAward / grant (A)Common Stock119,318USD 0.00USD 0SEC filing ↗
2026-06-16Tyree James LAward / grant (A)Common Stock28,409USD 0.00USD 0SEC filing ↗
2026-06-16Thomas JohnAward / grant (A)Common Stock28,409USD 0.00USD 0SEC filing ↗
2026-06-16Smither John WAward / grant (A)Common Stock28,409USD 0.00USD 0SEC filing ↗
2026-06-16Pulisic MatthewAward / grant (A)Common Stock278,906USD 0.00USD 0SEC filing ↗
2026-06-16Mirabelli MaryAward / grant (A)Common Stock28,409USD 0.00USD 0SEC filing ↗
2026-06-16Groen EricAward / grant (A)Common Stock233,957USD 0.00USD 0SEC filing ↗
2026-06-16Cappello JosephAward / grant (A)Common Stock174,841USD 0.00USD 0SEC filing ↗
2026-06-03Smalling RalphSale (S)Common Stock192USD 2.93USD 563SEC filing ↗
2026-06-01Thomas JohnSale (S)Common Stock10,000USD 2.98USD 29,800SEC filing ↗
2026-05-11Zindrick ThomasSale (S)Common Stock2,798USD 2.94USD 8,226SEC filing ↗
2026-05-11Yu YongSale (S)Common Stock605USD 2.97USD 1,797SEC filing ↗
2026-05-11Smalling RalphSale (S)Common Stock270USD 2.98USD 805SEC filing ↗
2026-05-11Cappello JosephSale (S)Common Stock605USD 2.97USD 1,797SEC filing ↗
2026-03-25Smalling RalphSale (S)Common Stock240USD 2.51USD 602SEC filing ↗
2026-03-24Zindrick ThomasSale (S)Common Stock3,582USD 2.42USD 8,668SEC filing ↗
2026-03-24Yu YongSale (S)Common Stock906USD 2.42USD 2,193SEC filing ↗
2026-03-24Smalling RalphSale (S)Common Stock345USD 2.42USD 835SEC filing ↗
2026-03-24Cappello JosephSale (S)Common Stock906USD 2.42USD 2,193SEC filing ↗
2026-03-02Thomas JohnSale (S)Common Stock10,000USD 2.90USD 29,000SEC filing ↗
2025-12-05Smalling RalphSale (S)Common Stock165USD 4.69USD 774SEC filing ↗
2025-12-01Thomas JohnSale (S)Common Stock10,000USD 5.00USD 50,000SEC 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 · —
TickerGNLX
CIK0001231457
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNasdaq

Data coverage

Local Form 4 history224 transaction lines from 2023-01-26 to 2026-08-31
10 P purchase lines · 139 S sale lines · 75 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.