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

KLA CORP

KLAC · Nasdaq · CIK 0000319201 · Technology · Semiconductor Equipment & Materials

INSIDER SIGNAL

No active buy signal

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

88 Form 4 transaction lines observed in the same window
20 sales · 68 option, withholding, award, gift or other lines

Last qualifying purchase2021-05-11 · MOORE GARY B · $113.5K

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.

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
Kirloskar Virendra ASVP & Chief Accounting Officer
○▼○○○○○▼▼
Lorig BrianEVP, KLA Global Services
○○○○○○○▼
Higgins Bren D.EVP & Chief Financial Officer
○○▼○○○○▼
Wilkinson Mary BethEVP, CLO and Secretary
○▼○○○○▼▼
WALLACE RICHARD PPresident and CEO
○○○○○▼▼
Khan Ahmad A.President, Semi. Prod. & Cust.
○○○○○○▼
● 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: 2021-05-11 · MOORE GARY B.

Recent Form 4 activity

0Purchases
22Sales
80Other Form 4 lines
57SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING20 sale line(s) · context only
OTHER68 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
24,261,297
Previous report
23,554,039
Avg daily volume
9,194,438
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
2021-05-11MOORE GARY BPurchase (P)Common Stock377USD 301.03USD 113,488SEC filing ↗

Form 4 evidence

102 transaction lines in the latest 365-day window; 951 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-15WALLACE RICHARD PSale (S)Common Stock72,019USD 171.88USD 12,378,626SEC filing ↗
2026-08-13Lorig BrianSale (S)Common Stock59,586USD 208.13USD 12,401,634SEC filing ↗
2026-08-12Higgins Bren D.Sale (S)Common Stock31,500USD 209.87USD 6,610,905SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-15WALLACE RICHARD PSale (S)Common Stock72,019USD 171.88USD 12,378,626SEC filing ↗
2026-08-13Lorig BrianSale (S)Common Stock59,586USD 208.13USD 12,401,634SEC filing ↗
2026-08-12Higgins Bren D.Sale (S)Common Stock31,500USD 209.87USD 6,610,905SEC filing ↗
2026-08-11WALLACE RICHARD PSale (S)Common Stock87,568USD 198.95USD 17,421,654SEC filing ↗
2026-08-11Khan Ahmad A.Sale (S)Common Stock33,180USD 198.95USD 6,601,161SEC filing ↗
2026-08-10Wilkinson Mary BethSale (S)Common Stock1,661USD 204.56USD 339,774SEC filing ↗
2026-08-10Kirloskar Virendra ASale (S)Common Stock529USD 204.56USD 108,212SEC filing ↗
2026-08-07Wilkinson Mary BethSale (S)Common Stock21,831USD 197.57USD 4,313,151SEC filing ↗
2026-08-07Wilkinson Mary BethTax withholding (F)Common Stock1,208USD 193.22USD 233,462SEC filing ↗
2026-08-07WALLACE RICHARD PTax withholding (F)Common Stock12,762USD 193.22USD 2,465,852SEC filing ↗
2026-08-07Lorig BrianTax withholding (F)Common Stock2,876USD 193.22USD 555,631SEC filing ↗
2026-08-07Kirloskar Virendra ASale (S)Common Stock2,405USD 197.57USD 475,156SEC filing ↗
2026-08-07Kirloskar Virendra ATax withholding (F)Common Stock521USD 193.22USD 100,588SEC filing ↗
2026-08-07Khan Ahmad A.Tax withholding (F)Common Stock4,532USD 193.22USD 875,598SEC filing ↗
2026-08-07Higgins Bren D.Tax withholding (F)Common Stock4,532USD 193.22USD 875,598SEC filing ↗
2026-08-06Wilkinson Mary BethTax withholding (F)Common Stock15,875USD 192.80USD 3,060,656SEC filing ↗
2026-08-06Wilkinson Mary BethAward / grant (A)Common Stock50,427USD 0.00USD 0SEC filing ↗
2026-08-06WALLACE RICHARD PTax withholding (F)Common Stock133,948USD 192.80USD 25,825,232SEC filing ↗
2026-08-06WALLACE RICHARD PAward / grant (A)Common Stock487,437USD 0.00USD 0SEC filing ↗
2026-08-06Lorig BrianTax withholding (F)Common Stock22,243USD 192.80USD 4,288,398SEC filing ↗
2026-08-06Lorig BrianAward / grant (A)Common Stock64,722USD 0.00USD 0SEC filing ↗
2026-08-06Kirloskar Virendra ATax withholding (F)Common Stock2,365USD 192.80USD 455,966SEC filing ↗
2026-08-06Kirloskar Virendra AAward / grant (A)Common Stock9,540USD 0.00USD 0SEC filing ↗
2026-08-06Khan Ahmad A.Tax withholding (F)Common Stock52,647USD 192.80USD 10,150,317SEC filing ↗
2026-08-06Khan Ahmad A.Award / grant (A)Common Stock149,896USD 0.00USD 0SEC filing ↗
2026-08-06Higgins Bren D.Tax withholding (F)Common Stock52,647USD 192.80USD 10,150,317SEC filing ↗
2026-08-06Higgins Bren D.Award / grant (A)Common Stock149,896USD 0.00USD 0SEC filing ↗
2026-08-05Wilkinson Mary BethAward / grant (A)Common Stock5,070USD 0.00USD 0SEC filing ↗
2026-08-05Lorig BrianAward / grant (A)Common Stock15,961USD 0.00USD 0SEC filing ↗
2026-08-05Kirloskar Virendra AAward / grant (A)Common Stock1,549USD 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 · —
TickerKLAC
CIK0000319201
SectorTechnology
IndustrySemiconductor Equipment & Materials Yahoo Finance
SEC SIC3827 Optical Instruments & Lenses
ExchangeNasdaq

Data coverage

Local Form 4 history951 transaction lines from 2020-02-01 to 2026-09-15
1 P purchase lines · 245 S sale lines · 705 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.