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

SEMTECH CORP

SMTC · Nasdaq · CIK 0000088941 · Technology · Semiconductors

INSIDER SIGNAL

No active buy signal

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

71 Form 4 transaction lines observed in the same window
36 sales · 35 option, withholding, award, gift or other lines

Last qualifying purchase2024-04-08 · Lin Mark · $33.2K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesHigh
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
Lin MarkEVP and CFO
○○▼○○▼○○▼
HOU HONG QPresident and CEO
▼▼▼○○○○▼
Silberstein AsafEVP and COO
○▼▼▼○○
Green Jason ElliotEVP and CCO
▼○○▼
Walsh Paul V JrDirector
▼▼▼
WILSON JOHN MICHAELChief Quality Officer and CTO
○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 2 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: 2024-04-08 · Lin Mark.

Recent Form 4 activity

0Purchases
60Sales
94Other Form 4 lines
86SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING36 sale line(s) · context only
OTHER35 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
6,213,132
Previous report
6,837,610
Avg daily volume
3,638,653
Days to cover
1.7

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
2024-04-08Lin MarkPurchase (P)Common Stock1,000USD 33.23USD 33,230SEC filing ↗
2023-09-18Walsh Paul V JrPurchase (P)Common Stock20,000USD 24.83USD 496,600SEC filing ↗

Form 4 evidence

154 transaction lines in the latest 365-day window; 865 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-07Green Jason ElliotSale (S)Common Stock2,766USD 190.35USD 526,508SEC filing ↗
2026-10-02HOU HONG QSale (S)Common Stock2,000USD 191.21USD 382,420SEC filing ↗
2026-10-01Lin MarkSale (S)Common Stock967USD 178.87USD 172,967SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-07Green Jason ElliotSale (S)Common Stock2,766USD 190.35USD 526,508SEC filing ↗
2026-10-02HOU HONG QSale (S)Common Stock2,000USD 191.21USD 382,420SEC filing ↗
2026-10-01Lin MarkSale (S)Common Stock967USD 178.87USD 172,967SEC filing ↗
2026-10-01Lin MarkOption exercise / conversion (M)Common Stock3,165USD 0.00USD 0SEC filing ↗
2026-10-01Lin MarkTax withholding (F)Common Stock1,565USD 178.35USD 279,118SEC filing ↗
2026-10-01HOU HONG QOption exercise / conversion (M)Common Stock6,483USD 0.00USD 0SEC filing ↗
2026-10-01HOU HONG QTax withholding (F)Common Stock3,299USD 178.35USD 588,377SEC filing ↗
2026-09-23Walsh Paul V JrSale (S)Common Stock500USD 172.61USD 86,305SEC filing ↗
2026-09-16Cardenuto Rodolpho CSale (S)Common Stock5,321USD 165.00USD 877,965SEC filing ↗
2026-09-10WILSON JOHN MICHAELOption exercise / conversion (M)Common Stock1,400USD 0.00USD 0SEC filing ↗
2026-09-10WILSON JOHN MICHAELTax withholding (F)Common Stock713USD 163.94USD 116,889SEC filing ↗
2026-09-10Silberstein AsafOption exercise / conversion (M)Common Stock2,439USD 0.00USD 0SEC filing ↗
2026-09-10Silberstein AsafTax withholding (F)Common Stock1,241USD 163.94USD 203,450SEC filing ↗
2026-09-10Lin MarkSale (S)Common Stock683USD 159.90USD 109,212SEC filing ↗
2026-09-10Lin MarkOption exercise / conversion (M)Common Stock2,348USD 0.00USD 0SEC filing ↗
2026-09-10Lin MarkTax withholding (F)Common Stock1,195USD 163.94USD 195,908SEC filing ↗
2026-09-10HOU HONG QOption exercise / conversion (M)Common Stock8,130USD 0.00USD 0SEC filing ↗
2026-09-10HOU HONG QTax withholding (F)Common Stock4,137USD 163.94USD 678,220SEC filing ↗
2026-09-10Green Jason ElliotOption exercise / conversion (M)Common Stock2,511USD 0.00USD 0SEC filing ↗
2026-09-10Green Jason ElliotTax withholding (F)Common Stock989USD 163.94USD 162,137SEC filing ↗
2026-09-04Ruehl Julie GarciaSale (S)Common Stock1,500USD 145.00USD 217,500SEC filing ↗
2026-09-04HOU HONG QSale (S)Common Stock2,000USD 138.71USD 277,420SEC filing ↗
2026-08-19Walsh Paul V JrSale (S)Common Stock500USD 135.48USD 67,740SEC filing ↗
2026-08-17Silberstein AsafSale (S)Common Stock5,000USD 150.00USD 750,000SEC filing ↗
2026-08-07HOU HONG QSale (S)Common Stock2,000USD 140.00USD 280,000SEC filing ↗
2026-07-22Walsh Paul V JrSale (S)Common Stock500USD 133.07USD 66,535SEC filing ↗
2026-07-14Silberstein AsafSale (S)Common Stock3,000USD 145.04USD 435,120SEC filing ↗
2026-07-10HOU HONG QSale (S)Common Stock2,000USD 133.00USD 266,000SEC filing ↗
2026-07-08Silberstein AsafSale (S)Common Stock8,500USD 127.80USD 1,086,307SEC filing ↗
2026-07-07Green Jason ElliotSale (S)Common Stock2,264USD 129.90USD 294,094SEC 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 · —
TickerSMTC
CIK0000088941
SectorTechnology
IndustrySemiconductors Yahoo Finance
SEC SIC3674 Semiconductors & Related Devices
ExchangeNasdaq

Data coverage

Local Form 4 history865 transaction lines from 2020-01-02 to 2026-10-07
2 P purchase lines · 237 S sale lines · 626 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.