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

TERADYNE, INC

TER · Nasdaq · CIK 0000097210 · Technology · Semiconductor Equipment & Materials

INSIDER SIGNAL

No active buy signal

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

45 Form 4 transaction lines observed in the same window
20 sales · 25 option, withholding, award, gift or other lines

Last qualifying purchase2024-03-15 · MATZ MARILYN · $1.4K

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
MATZ MARILYNDirector
○▼▼▼▼▼▼▼
Smith Gregory StephenPresident and CEO
○▼▼▼▼▼
JOHNSON MERCEDESDirector
○▼▼▼▼▼
TUFANO PAUL JDirector
○○○○○
Herweck PeterDirector
○○○○○
Poulin Shannon JohnPresident, Semiconductor Test
○○▼▼
● Purchase▼ Sale○ Other

Showing the six most active owners; 6 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: 2024-03-15 · MATZ MARILYN.

Recent Form 4 activity

0Purchases
31Sales
57Other Form 4 lines
73SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING20 sale line(s) · context only
OTHER25 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
8,629,094
Previous report
8,098,218
Avg daily volume
2,350,400
Days to cover
3.7

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
2024-03-15MATZ MARILYNPurchase (P)Common Stock13USD 106.04USD 1,414SEC filing ↗
2024-02-01MADDOCK ERNEST EPurchase (P)Common Stock1,000USD 94.07USD 94,070SEC filing ↗

Form 4 evidence

88 transaction lines in the latest 365-day window; 696 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01JOHNSON MERCEDESSale (S)Common Stock167USD 402.90USD 67,284SEC filing ↗
2026-09-25TUFANO PAUL JJ (J)Common Stock19USD 0.00USD 0SEC filing ↗
2026-09-25MADDOCK ERNEST EJ (J)Common Stock2USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01JOHNSON MERCEDESSale (S)Common Stock167USD 402.90USD 67,284SEC filing ↗
2026-09-25TUFANO PAUL JJ (J)Common Stock19USD 0.00USD 0SEC filing ↗
2026-09-25MADDOCK ERNEST EJ (J)Common Stock2USD 0.00USD 0SEC filing ↗
2026-09-25Herweck PeterJ (J)Common Stock4USD 0.00USD 0SEC filing ↗
2026-09-24TUFANO PAUL JAward / grant (A)Common Stock141USD 0.00USD 0SEC filing ↗
2026-09-24Herweck PeterAward / grant (A)Common Stock77USD 0.00USD 0SEC filing ↗
2026-09-24Henry Andrew ChisholmAward / grant (A)Common Stock64USD 0.00USD 0SEC filing ↗
2026-09-17MATZ MARILYNSale (S)Common Stock400USD 351.11USD 140,444SEC filing ↗
2026-09-15Smith Gregory StephenSale (S)Common Stock4,000USD 337.83USD 1,351,320SEC filing ↗
2026-09-15MATZ MARILYNSale (S)Common Stock800USD 337.83USD 270,264SEC filing ↗
2026-09-01JOHNSON MERCEDESSale (S)Common Stock167USD 341.30USD 56,997SEC filing ↗
2026-08-17Smith Gregory StephenSale (S)Common Stock4,000USD 425.00USD 1,700,000SEC filing ↗
2026-08-17MATZ MARILYNSale (S)Common Stock1,200USD 425.00USD 510,000SEC filing ↗
2026-08-03JOHNSON MERCEDESSale (S)Common Stock166USD 358.15USD 59,453SEC filing ↗
2026-07-15Smith Gregory StephenSale (S)Common Stock4,000USD 356.31USD 1,425,240SEC filing ↗
2026-07-15MATZ MARILYNSale (S)Common Stock1,200USD 356.31USD 427,572SEC filing ↗
2026-07-01JOHNSON MERCEDESSale (S)Common Stock167USD 460.00USD 76,820SEC filing ↗
2026-06-25TUFANO PAUL JAward / grant (A)Common Stock116USD 0.00USD 0SEC filing ↗
2026-06-25Herweck PeterAward / grant (A)Common Stock63USD 0.00USD 0SEC filing ↗
2026-06-25Henry Andrew ChisholmAward / grant (A)Common Stock52USD 0.00USD 0SEC filing ↗
2026-06-15Smith Gregory StephenSale (S)Common Stock4,000USD 423.03USD 1,692,120SEC filing ↗
2026-06-15MATZ MARILYNSale (S)Common Stock1,200USD 423.03USD 507,636SEC filing ↗
2026-06-12TUFANO PAUL JJ (J)Common Stock19USD 0.00USD 0SEC filing ↗
2026-06-12MADDOCK ERNEST EJ (J)Common Stock2USD 0.00USD 0SEC filing ↗
2026-06-12Herweck PeterJ (J)Common Stock4USD 0.00USD 0SEC filing ↗
2026-06-02JOHNSON MERCEDESSale (S)Common Stock167USD 369.74USD 61,747SEC filing ↗
2026-06-02Hathout Jean PierreTax withholding (F)Common Stock174USD 392.62USD 68,316SEC filing ↗
2026-06-01Hathout Jean PierreTax withholding (F)Common Stock267USD 369.47USD 98,648SEC filing ↗
2026-05-22Poulin Shannon JohnSale (S)Common Stock656USD 355.00USD 232,880SEC filing ↗
2026-05-21Poulin Shannon JohnSale (S)Common Stock1,008USD 345.37USD 348,133SEC 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 · —
TickerTER
CIK0000097210
SectorTechnology
IndustrySemiconductor Equipment & Materials Yahoo Finance
SEC SIC3825 Instruments For Meas & Testing of Electricity & Elec Signals
ExchangeNasdaq

Data coverage

Local Form 4 history696 transaction lines from 2020-01-24 to 2026-10-01
2 P purchase lines · 215 S sale lines · 479 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.