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

INNOVATIVE SOLUTIONS & SUPPORT INC

ISSC · Nasdaq · CIK 0000836690 · Technology · Aerospace & Defense

INSIDER SIGNAL

No active buy signal

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

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

Last qualifying purchase2024-08-15 · BRESSNER GLEN R · $27.3K

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
DiGiovanni JeffreyChief Financial Officer
○○○○○
BRESSNER GLEN RDirector
○○
Askarpour ShahramChief Executive Officer
○○
● 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: 2024-08-15 · BRESSNER GLEN R.

Recent Form 4 activity

0Purchases
0Sales
29Other Form 4 lines
27SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING0 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

The FINRA report lists no short interest for this ticker.

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
2024-08-15BRESSNER GLEN RPurchase (P)Common Stock4,000USD 6.83USD 27,320SEC filing ↗
2024-08-14BRESSNER GLEN RPurchase (P)Common Stock1,000USD 6.71USD 6,710SEC filing ↗
2024-08-13BRESSNER GLEN RPurchase (P)Common Stock5,000USD 6.53USD 32,650SEC filing ↗
2024-05-22BRESSNER GLEN RPurchase (P)Common Stock2,109USD 5.63USD 11,874SEC filing ↗
2024-05-21BRESSNER GLEN RPurchase (P)Common Stock12,891USD 5.55USD 71,545SEC filing ↗
2023-09-08BRESSNER GLEN RPurchase (P)Common Stock10,000USD 7.85USD 78,500SEC filing ↗
2023-05-18BRESSNER GLEN RPurchase (P)Common Stock1,742USD 8.10USD 14,110SEC filing ↗
2023-05-18BRESSNER GLEN RPurchase (P)Common Stock1,319USD 7.15USD 9,431SEC filing ↗
2023-05-16BRESSNER GLEN RPurchase (P)Common Stock1,319USD 7.21USD 9,510SEC filing ↗
2023-05-15BRESSNER GLEN RPurchase (P)Common Stock3,681USD 7.15USD 26,319SEC filing ↗
2023-03-29Harborne ChristopherPurchase (P)Common Stock, par value $0.001 per share6,506USD 7.50USD 48,795SEC filing ↗
2023-03-24Harborne ChristopherPurchase (P)Common Stock, par value $0.001 per share11,294USD 7.40USD 83,576SEC filing ↗
2023-03-23Harborne ChristopherPurchase (P)Common Stock, par value $0.001 per share5,730USD 7.75USD 44,408SEC filing ↗
2023-03-21Harborne ChristopherPurchase (P)Common Stock, par value $0.001 per share7,104USD 7.75USD 55,056SEC filing ↗
2023-03-20Harborne ChristopherPurchase (P)Common Stock, par value $0.001 per share12,856USD 7.74USD 99,505SEC filing ↗

Form 4 evidence

29 transaction lines in the latest 365-day window; 229 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-30DiGiovanni JeffreyTax withholding (F)Common Stock911USD 18.57USD 16,917SEC filing ↗
2026-08-31DiGiovanni JeffreyTax withholding (F)Common Stock480USD 19.00USD 9,120SEC filing ↗
2026-08-31BRESSNER GLEN RAward / grant (A)Common Stock2,500USD 19.69USD 49,225SEC filing ↗
Show recent Form 4 evidence (29 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-30DiGiovanni JeffreyTax withholding (F)Common Stock911USD 18.57USD 16,917SEC filing ↗
2026-08-31DiGiovanni JeffreyTax withholding (F)Common Stock480USD 19.00USD 9,120SEC filing ↗
2026-08-31BRESSNER GLEN RAward / grant (A)Common Stock2,500USD 19.69USD 49,225SEC filing ↗
2026-08-31Askarpour ShahramTax withholding (F)Common Stock1,159USD 19.00USD 22,021SEC filing ↗
2026-07-08DiGiovanni JeffreyTax withholding (F)Common Stock749USD 18.31USD 13,714SEC filing ↗
2026-06-30DiGiovanni JeffreyTax withholding (F)Common Stock910USD 18.00USD 16,380SEC filing ↗
2026-05-20BRESSNER GLEN RAward / grant (A)Common Stock6,300USD 15.93USD 100,359SEC filing ↗
2026-05-18DiGiovanni JeffreyTax withholding (F)Common Stock474USD 16.26USD 7,707SEC filing ↗
2026-05-18Askarpour ShahramTax withholding (F)Common Stock906USD 16.26USD 14,732SEC filing ↗
2026-04-16Silfen Richard AAward / grant (A)Restricted Stock Units5,618USD 0.00USD 0SEC filing ↗
2026-04-16Devine Denise LD (D)Restricted Stock Units5,403USD 0.00USD 0SEC filing ↗
2026-04-16Devine Denise LAward / grant (A)Restricted Stock Units5,618USD 0.00USD 0SEC filing ↗
2026-04-16Dean Garry C.Award / grant (A)Restricted Stock Units5,618USD 0.00USD 0SEC filing ↗
2026-04-16Carolin Roger AnthonyAward / grant (A)Restricted Stock Units5,618USD 0.00USD 0SEC filing ↗
2026-04-16Belland Stephen LAward / grant (A)Restricted Stock Units5,618USD 0.00USD 0SEC filing ↗
2026-04-16BRESSNER GLEN RAward / grant (A)Restricted Stock Units5,618USD 0.00USD 0SEC filing ↗
2026-04-08DiGiovanni JeffreyTax withholding (F)Common Stock765USD 23.02USD 17,610SEC filing ↗
2026-02-22Askarpour ShahramTax withholding (F)Common Stock2,876USD 24.32USD 69,944SEC filing ↗
2026-02-18DiGiovanni JeffreyTax withholding (F)Common Stock2,172USD 23.52USD 51,085SEC filing ↗
2026-02-18Askarpour ShahramTax withholding (F)Common Stock3,625USD 23.52USD 85,260SEC filing ↗
2026-02-17Silfen Richard AAward / grant (A)Restricted Stock Units1,890USD 0.00USD 0SEC filing ↗
2026-02-17DiGiovanni JeffreyAward / grant (A)Restricted Stock Units9,455USD 0.00USD 0SEC filing ↗
2026-02-17Askarpour ShahramAward / grant (A)Restricted Stock Units20,171USD 0.00USD 0SEC filing ↗
2026-01-13DiGiovanni JeffreyTax withholding (F)Common Stock868USD 18.80USD 16,318SEC filing ↗
2026-01-11Askarpour ShahramTax withholding (F)Common Stock2,128USD 18.41USD 39,176SEC filing ↗
2025-12-31DiGiovanni JeffreyTax withholding (F)Common Stock1,000USD 18.94USD 18,940SEC filing ↗
2025-11-20Askarpour ShahramOption exercise / conversion (M)Common Stock201,000USD —USD —SEC filing ↗
2025-11-20Askarpour ShahramTax withholding (F)Common Stock87,918USD 8.42USD 740,270SEC filing ↗
2025-11-20Askarpour ShahramOption exercise / conversion (M)Common Stock201,000USD —USD —SEC 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 · —
TickerISSC
CIK0000836690
SectorTechnology
IndustryAerospace & Defense Yahoo Finance
SEC SIC7371 Services-Computer Programming Services
ExchangeNasdaq

Data coverage

Local Form 4 history229 transaction lines from 2020-01-02 to 2026-09-30
55 P purchase lines · 92 S sale lines · 82 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.