KLA CORP (KLAC)

Data as of Sep 16, 2026, from SEC Form 4 filings.

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Latest KLAC insider trades

Richard P. Wallace - Officer
Open-market sale$12.38M
Sep 15, 2026
Brian Lorig - Officer
Open-market sale$12.40M

About KLA CORP (KLAC)

KLA is one of the largest semiconductor wafer fabrication equipment, or WFE, manufacturers in the world. It specializes in the market segment of semiconductor process control, wherein machines inspect semiconductor wafers during research and development and manufacturing for defects and verify precise measurements. In this section of the market, KLA holds a majority share. It also has a small exposure to the etch and deposition segments of the WFE market. It counts as top customers the largest chipmakers in the world, including TSMC and Samsung.

Headquarters: MILPITAS, CA
Employees: 17,200
Listed: 1980
Exchange: XNAS
Sector: Information Technology

https://www.kla.com SEC filings for KLAC on EDGAR

KLAC Form 4 activity by transaction type, last 90 days

Form 4 transaction type	Transactions	Shares	Total value
Open-market sale	13	334,445	$65.35M
Grant or award	17	983,320
Tax withholding / forfeiture	41	572,351

Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.

KLAC insider transactions (Form 4)

104 Form 4 filings on record, the earliest from Nov 8, 2024, newest first. Filing history page 2 of 3.

Date	Insider	Transaction	Security	Shares	Price	Value
Aug 1, 2026	Bren D. Higgins - Officer	Tax withholding / forfeiture	Common Stock	4,504^{footnote F1}	$182.82	$823K
Aug 3, 2026	Bren D. Higgins - Officer	Tax withholding / forfeiture	Common Stock	7,224^{footnote F3}	$182.82	$1.32M
Footnote F1 (shares): On August 1, 2024, the Reporting Person was granted restricted stock units ("RSUs") of shares of KLA common stock. On August 1, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at… Full note on SEC EDGAR Footnote F3 (shares): On August 3, 2023, the Reporting Person was granted RSUs of shares of KLA common stock. On August 3, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at vesting to cover required tax… Full note on SEC EDGAR
Aug 1, 2026	Mary Beth Wilkinson - Officer	Tax withholding / forfeiture	Common Stock	1,339^{footnote F1}	$182.82	$245K
Aug 3, 2026	Mary Beth Wilkinson - Officer	Tax withholding / forfeiture	Common Stock	1,785^{footnote F3}	$182.82	$326K
Footnote F1 (shares): On August 1, 2024, the Reporting Person was granted restricted stock units ("RSUs") of shares of KLA common stock. On August 1, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at… Full note on SEC EDGAR Footnote F3 (shares): On August 3, 2023, the Reporting Person was granted RSUs of shares of KLA common stock. On August 3, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at vesting to cover required tax… Full note on SEC EDGAR
Aug 1, 2026	Virendra A. Kirloskar - Officer	Tax withholding / forfeiture	Common Stock	373.46^{footnote F1}	$182.82	$68K
Aug 3, 2026	Virendra A. Kirloskar - Officer	Tax withholding / forfeiture	Common Stock	730.19^{footnote F3}	$182.82	$133K
Footnote F1 (shares): On August 1, 2024, the Reporting Person was granted restricted stock units ("RSUs") of shares of KLA common stock. On August 1, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at… Full note on SEC EDGAR Footnote F3 (shares): On August 3, 2023, the Reporting Person was granted RSUs of shares of KLA common stock. On August 3, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at vesting to cover required tax… Full note on SEC EDGAR
Jul 2, 2026	Bren D. Higgins - Officer	Open-market sale	Common Stock	27,701^{footnote F1}	$265.69	$7.36M
Footnote F1 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on May 5, 2025.
Jun 30, 2026	Virendra A. Kirloskar - Officer	Other	Common Stock	196.16^{footnote F1}	$108.33^{footnote F2}	$21K
Jul 2, 2026	Virendra A. Kirloskar - Officer	Open-market sale	Common Stock	196^{footnote F4}	$265.69	$52K
Footnote F1 (shares): Purchased under the registrant's employee stock purchase plan. Footnote F2 (price): Represents 85% of the closing price of the registrant's common stock on January 2, 2026, the first day of the offering period under the employee stock purchase plan. Footnote F4 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on February 18, 2026.
Jun 30, 2026	Brian Lorig - Officer	Other	Common Stock	196.16^{footnote F1}	$108.33^{footnote F2}	$21K
Jun 30, 2026	Brian Lorig - Officer	Tax withholding / forfeiture	Common Stock	12,222^{footnote F4,F5}	$278.39	$3.40M
Footnote F1 (shares): Purchased under the registrant's employee stock purchase plan. Footnote F2 (price): Represents 85% of the closing price of the registrant's common stock on January 2, 2026, the first day of the offering period under the employee stock purchase plan. Footnote F4 (shares): On August 4, 2022, the reporting person was granted RSUs with both performance-based and service-based vesting conditions ("PRSUs") divided into three tranches. On August 7, 2025, KLA's Board of Directors and Compensation and Talent Committee determined that the performance… Full note on SEC EDGAR Footnote F5 (shares): Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld to cover required tax withholding on the 24,651.900 shares of KLA common stock that vested. The fair market value of KLA common stock used for purposes of calculating the number of shares… Full note on SEC EDGAR
Jun 30, 2026	Bren D. Higgins - Officer	Other	Common Stock	196.16^{footnote F1}	$108.33^{footnote F2}	$21K
Jun 30, 2026	Bren D. Higgins - Officer	Tax withholding / forfeiture	Common Stock	30,567^{footnote F4,F5}	$278.39	$8.51M
Footnote F1 (shares): Purchased under the registrant's employee stock purchase plan. Footnote F2 (price): Represents 85% of the closing price of the registrant's common stock on January 2, 2026, the first day of the offering period under the employee stock purchase plan. Footnote F4 (shares): On August 4, 2022, the reporting person was granted RSUs with both performance-based and service-based vesting conditions ("PRSUs") divided into three tranches. On August 7, 2025, KLA's Board of Directors and Compensation and Talent Committee determined that the performance… Full note on SEC EDGAR Footnote F5 (shares): Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld to cover required tax withholding on the 61,651.800 shares of KLA common stock that vested. The fair market value of KLA common stock used for purposes of calculating the number of shares… Full note on SEC EDGAR
Jun 30, 2026	Richard P. Wallace - Officer	Other	Common Stock	196.16^{footnote F1}	$108.33^{footnote F2}	$21K
Jun 30, 2026	Richard P. Wallace - Officer	Tax withholding / forfeiture	Common Stock	45,850^{footnote F4,F5}	$278.39	$12.76M
Footnote F1 (shares): Purchased under the registrant's employee stock purchase plan. Footnote F2 (price): Represents 85% of the closing price of the registrant's common stock on January 2, 2026, the first day of the offering period under the employee stock purchase plan. Footnote F4 (shares): On August 4, 2022, the reporting person was granted RSUs with both performance-based and service-based vesting conditions ("PRSUs") divided into three tranches. On August 7, 2025, KLA's Board of Directors and Compensation and Talent Committee determined that the performance… Full note on SEC EDGAR Footnote F5 (shares): Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld to cover required tax withholding on the 92,477.700 shares of KLA common stock that vested. The fair market value of KLA common stock used for purposes of calculating the number of shares… Full note on SEC EDGAR
Jun 30, 2026	Mary Beth Wilkinson - Officer	Tax withholding / forfeiture	Common Stock	10,260^{footnote F1,F2}	$278.39	$2.86M
Jul 1, 2026	Mary Beth Wilkinson - Officer	Open-market sale	Common Stock	14,392^{footnote F4}	$285.30	$4.11M
Footnote F1 (shares): On August 4, 2022, the reporting person was granted RSUs with both performance-based and service-based vesting conditions ("PRSUs") divided into three tranches. On August 7, 2025, KLA's Board of Directors and Compensation and Talent Committee determined that the performance… Full note on SEC EDGAR Footnote F2 (shares): Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld to cover required tax withholding on the 24,651.900 shares of KLA common stock that vested. The fair market value of KLA common stock used for purposes of calculating the number of shares… Full note on SEC EDGAR Footnote F4 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on February 2, 2026.
Jun 30, 2026	Ahmad A. Khan - Officer	Other	Common Stock	196.16^{footnote F1}	$108.33^{footnote F2}	$21K
Jun 30, 2026	Ahmad A. Khan - Officer	Tax withholding / forfeiture	Common Stock	30,567^{footnote F4,F5}	$278.39	$8.51M
Footnote F1 (shares): Purchased under the registrant's employee stock purchase plan. Footnote F2 (price): Represents 85% of the closing price of the registrant's common stock on January 2, 2026, the first day of the offering period under the employee stock purchase plan. Footnote F4 (shares): On August 4, 2022, the reporting person was granted RSUs with both performance-based and service-based vesting conditions ("PRSUs") divided into three tranches. On August 7, 2025, KLA's Board of Directors and Compensation and Talent Committee determined that the performance… Full note on SEC EDGAR Footnote F5 (shares): Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld to cover required tax withholding on the 61,651.800 shares of KLA common stock that vested. The fair market value of KLA common stock used for purposes of calculating the number of shares… Full note on SEC EDGAR
Jun 11, 2026	Richard P. Wallace - Officer	Open-market sale	Common Stock	4,512^{footnote F1}	$221.34	$9.99M
Footnote F1 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on November 19, 2025.
May 12, 2026	Richard P. Wallace - Officer	Open-market sale	Common Stock	4,512^{footnote F1}	$179.40	$8.09M
Footnote F1 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on November 19, 2025.
May 11, 2026	Virendra A. Kirloskar - Officer	Open-market sale	Common Stock	297	$187.90	$558K
May 11, 2026	Jeneanne Michelle Hanley	Open-market sale	Common Stock	550	$1,874.71^{footnote F1}	$1.03M
Footnote F1 (price): Represents the weighted average sales price for the shares. The sales prices ranged from $1,874.64 to $1,875.08. The Reporting Person will provide upon request full information regarding the number of shares sold at each separate price.
Feb 5, 2026	Robert Calderoni	Grant or award	Common Stock	11.27^{footnote F1}	$0.00	-
Footnote F1 (shares): On February 5, 2026, the Reporting Person received a grant of restricted stock units ("RSUs") for 11.269 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) February 5, 2027, (ii) immediately prior to the next annual meeting of stockholders, and (iii) ten… Full note on SEC EDGAR
Dec 16, 2025	Bren D. Higgins - Officer	Open-market sale	Common Stock	2,254^{footnote F1}	$123.70	$2.79M
Footnote F1 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on May 5, 2025.
Nov 12, 2025	Ahmad A. Khan - Officer	Gift	Common Stock	85	$0.00	-
Nov 11, 2025	Richard P. Wallace - Officer	Open-market sale	Common Stock	10,803^{footnote F1}	$120.31	$13.00M
Nov 11, 2025	Richard P. Wallace - Officer	Gift	Common Stock	804^{footnote F3}	$0.00	-
Footnote F1 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on November 1, 2024. Footnote F3 (shares): This gift was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on November 1, 2024.
Nov 5, 2025	Tracy A. Embree	Grant or award	Common Stock	203.73^{footnote F1}	$0.00	-
Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR
Nov 5, 2025	Jason Conley	Grant or award	Common Stock	203.73^{footnote F1}	$0.00	-
Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR
Nov 5, 2025	Robert Calderoni	Grant or award	Common Stock	256.7^{footnote F1}	$0.00	-
Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 256.702 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR
Nov 5, 2025	Michael R. McMullen	Grant or award	Common Stock	203.73^{footnote F1}	$0.00	-
Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR
Nov 5, 2025	Susan J.S. Taylor	Grant or award	Common Stock	203.73^{footnote F1}	$0.00	-
Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR
Nov 5, 2025	Victor Peng	Grant or award	Common Stock	203.73^{footnote F1}	$0.00	-
Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR
Nov 5, 2025	Kevin Kennedy	Grant or award	Common Stock	203.73^{footnote F1}	$0.00	-
Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR
Nov 5, 2025	Jeneanne Michelle Hanley	Grant or award	Common Stock	203.73^{footnote F1}	$0.00	-
Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR
Nov 5, 2025	Jamie Samath	Grant or award	Common Stock	203.73^{footnote F1}	$0.00	-
Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR
Sep 5, 2025	Ahmad A. Khan - Officer	Open-market sale	Common Stock	4,564	$90.00	$4.11M
Aug 29, 2025	Ahmad A. Khan - Officer	Open-market sale	Common Stock	13,716	$88.15	$12.09M
Aug 20, 2025	Bren D. Higgins - Officer	Open-market sale	Common Stock	2,301	$87.85	$2.02M

Recent KLAC Form 8-K filings

Read KLAC company news

Aug 6, 2026Item 8.01, 9.01

Read the filing on SEC EDGAR

Jul 28, 2026Item 2.02, 9.01

Read the filing on SEC EDGAR

Jun 12, 2026Item 5.03, 9.01

Read the filing on SEC EDGAR

May 7, 2026Item 8.01, 9.01

Read the filing on SEC EDGAR

Recent KLAC Form 144 notices of proposed sale

An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.

Filed	Filer	Relationship	Shares	Market value	Notice
Sep 15, 2026	WALLACE RICHARD P	Officer, Director	72,019	$12.38M	View on EDGAR
Aug 13, 2026	Lorig Brian	Officer	59,586

Congress trades in KLAC

All congress trades

Stock trades in KLAC disclosed by members of the U.S. House in the last 12 months, newest first. Values are the ranges as filed.

Member	Type	Traded	Disclosed	Value range	Owner	Days to disclose	Filing
Michael A. RulliRepublican, OH-06	Purchase

KLAC insider trading FAQ

What is the latest insider trade for KLAC?

KLA CORP (KLAC) had 33 insider filings in the last 90 days, with the most recent on 2026-09-16. The full record for KLAC runs to 104 Form 4 filings, the earliest from 2024-11-08. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.

How many insiders are buying KLAC stock?

No insider purchases of KLAC were filed in the last 90 days.

How many insiders are selling KLAC stock?

13 insider sales of KLAC were filed in the last 90 days, totaling $65.35M.

Where can I see KLAC SEC filings (Form 4, 10-K, 10-Q, 8-K)?

This page collects KLAC Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.

More Information Technology companies with insider activity

Recent insider filings

The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.

Sep 16, 2026 - Richard P. Wallace view on EDGAR
Aug 14, 2026 - Brian Lorig view on EDGAR
Aug 13, 2026 - Bren D. Higgins view on EDGAR
Aug 12, 2026 - Ahmad A. Khan view on EDGAR
Aug 12, 2026 - Richard P. Wallace view on EDGAR
Aug 11, 2026 - Virendra A. Kirloskar view on EDGAR
Aug 11, 2026 - Mary Beth Wilkinson view on EDGAR
Aug 10, 2026 - Richard P. Wallace view on EDGAR
Aug 10, 2026 - Brian Lorig view on EDGAR

Related companies with recent insider activity

Learn more

Insider selling: signal or noise?: Why most insider sales are routine, and the few patterns worth a second look.
Form 144 vs Form 4: A Form 144 announces a planned sale; the Form 4 reports it after it happens.
Insider activity in Information Technology: Where KLAC's peers are being bought and sold.
Every recent Form 4: The market-wide feed, updated as filings arrive from SEC EDGAR.

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Form 4 transaction type

Transactions

Total value

Open-market sale

334,445

$65.35M

Grant or award

983,320

Tax withholding / forfeiture

572,351

Date

Insider

Transaction

Security

Price

Value

Aug 1, 2026

Bren D. Higgins - Officer

Tax withholding / forfeiture

Common Stock

4,504^{footnote F1}

$182.82

$823K

Aug 3, 2026

Bren D. Higgins - Officer

Tax withholding / forfeiture

Common Stock

7,224^{footnote F3}

$182.82

$1.32M

Footnote F1 (shares): On August 1, 2024, the Reporting Person was granted restricted stock units ("RSUs") of shares of KLA common stock. On August 1, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at… Full note on SEC EDGAR
Footnote F3 (shares): On August 3, 2023, the Reporting Person was granted RSUs of shares of KLA common stock. On August 3, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at vesting to cover required tax… Full note on SEC EDGAR

Aug 1, 2026

Mary Beth Wilkinson - Officer

Tax withholding / forfeiture

Common Stock

1,339^{footnote F1}

$182.82

$245K

Aug 3, 2026

Mary Beth Wilkinson - Officer

Tax withholding / forfeiture

Common Stock

1,785^{footnote F3}

$182.82

$326K

Footnote F1 (shares): On August 1, 2024, the Reporting Person was granted restricted stock units ("RSUs") of shares of KLA common stock. On August 1, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at… Full note on SEC EDGAR
Footnote F3 (shares): On August 3, 2023, the Reporting Person was granted RSUs of shares of KLA common stock. On August 3, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at vesting to cover required tax… Full note on SEC EDGAR

Aug 1, 2026

Virendra A. Kirloskar - Officer

Tax withholding / forfeiture

Common Stock

373.46^{footnote F1}

$182.82

$68K

Aug 3, 2026

Virendra A. Kirloskar - Officer

Tax withholding / forfeiture

Common Stock

730.19^{footnote F3}

$182.82

$133K

Footnote F1 (shares): On August 1, 2024, the Reporting Person was granted restricted stock units ("RSUs") of shares of KLA common stock. On August 1, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at… Full note on SEC EDGAR
Footnote F3 (shares): On August 3, 2023, the Reporting Person was granted RSUs of shares of KLA common stock. On August 3, 2026, twenty-five percent (25%) of the RSUs vested. Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld at vesting to cover required tax… Full note on SEC EDGAR

Jul 2, 2026

Bren D. Higgins - Officer

Open-market sale

Common Stock

27,701^{footnote F1}

$265.69

$7.36M

Footnote F1 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on May 5, 2025.

Jun 30, 2026

Virendra A. Kirloskar - Officer

Other

Common Stock

196.16^{footnote F1}

$108.33^{footnote F2}

$21K

Jul 2, 2026

Virendra A. Kirloskar - Officer

Open-market sale

Common Stock

196^{footnote F4}

$265.69

$52K

Footnote F1 (shares): Purchased under the registrant's employee stock purchase plan.
Footnote F2 (price): Represents 85% of the closing price of the registrant's common stock on January 2, 2026, the first day of the offering period under the employee stock purchase plan.
Footnote F4 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on February 18, 2026.

Jun 30, 2026

Brian Lorig - Officer

Other

Common Stock

196.16^{footnote F1}

$108.33^{footnote F2}

$21K

Jun 30, 2026

Brian Lorig - Officer

Tax withholding / forfeiture

Common Stock

12,222^{footnote F4,F5}

$278.39

$3.40M

Footnote F1 (shares): Purchased under the registrant's employee stock purchase plan.
Footnote F2 (price): Represents 85% of the closing price of the registrant's common stock on January 2, 2026, the first day of the offering period under the employee stock purchase plan.
Footnote F4 (shares): On August 4, 2022, the reporting person was granted RSUs with both performance-based and service-based vesting conditions ("PRSUs") divided into three tranches. On August 7, 2025, KLA's Board of Directors and Compensation and Talent Committee determined that the performance… Full note on SEC EDGAR
Footnote F5 (shares): Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld to cover required tax withholding on the 24,651.900 shares of KLA common stock that vested. The fair market value of KLA common stock used for purposes of calculating the number of shares… Full note on SEC EDGAR

Jun 30, 2026

Bren D. Higgins - Officer

Other

Common Stock

196.16^{footnote F1}

$108.33^{footnote F2}

$21K

Jun 30, 2026

Bren D. Higgins - Officer

Tax withholding / forfeiture

Common Stock

30,567^{footnote F4,F5}

$278.39

$8.51M

Footnote F1 (shares): Purchased under the registrant's employee stock purchase plan.
Footnote F2 (price): Represents 85% of the closing price of the registrant's common stock on January 2, 2026, the first day of the offering period under the employee stock purchase plan.
Footnote F4 (shares): On August 4, 2022, the reporting person was granted RSUs with both performance-based and service-based vesting conditions ("PRSUs") divided into three tranches. On August 7, 2025, KLA's Board of Directors and Compensation and Talent Committee determined that the performance… Full note on SEC EDGAR
Footnote F5 (shares): Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld to cover required tax withholding on the 61,651.800 shares of KLA common stock that vested. The fair market value of KLA common stock used for purposes of calculating the number of shares… Full note on SEC EDGAR

Jun 30, 2026

Richard P. Wallace - Officer

Other

Common Stock

196.16^{footnote F1}

$108.33^{footnote F2}

$21K

Jun 30, 2026

Richard P. Wallace - Officer

Tax withholding / forfeiture

Common Stock

45,850^{footnote F4,F5}

$278.39

$12.76M

Footnote F1 (shares): Purchased under the registrant's employee stock purchase plan.
Footnote F2 (price): Represents 85% of the closing price of the registrant's common stock on January 2, 2026, the first day of the offering period under the employee stock purchase plan.
Footnote F4 (shares): On August 4, 2022, the reporting person was granted RSUs with both performance-based and service-based vesting conditions ("PRSUs") divided into three tranches. On August 7, 2025, KLA's Board of Directors and Compensation and Talent Committee determined that the performance… Full note on SEC EDGAR
Footnote F5 (shares): Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld to cover required tax withholding on the 92,477.700 shares of KLA common stock that vested. The fair market value of KLA common stock used for purposes of calculating the number of shares… Full note on SEC EDGAR

Jun 30, 2026

Mary Beth Wilkinson - Officer

Tax withholding / forfeiture

Common Stock

10,260^{footnote F1,F2}

$278.39

$2.86M

Jul 1, 2026

Mary Beth Wilkinson - Officer

Open-market sale

Common Stock

14,392^{footnote F4}

$285.30

$4.11M

Footnote F1 (shares): On August 4, 2022, the reporting person was granted RSUs with both performance-based and service-based vesting conditions ("PRSUs") divided into three tranches. On August 7, 2025, KLA's Board of Directors and Compensation and Talent Committee determined that the performance… Full note on SEC EDGAR
Footnote F2 (shares): Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld to cover required tax withholding on the 24,651.900 shares of KLA common stock that vested. The fair market value of KLA common stock used for purposes of calculating the number of shares… Full note on SEC EDGAR
Footnote F4 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on February 2, 2026.

Jun 30, 2026

Ahmad A. Khan - Officer

Other

Common Stock

196.16^{footnote F1}

$108.33^{footnote F2}

$21K

Jun 30, 2026

Ahmad A. Khan - Officer

Tax withholding / forfeiture

Common Stock

30,567^{footnote F4,F5}

$278.39

$8.51M

Footnote F1 (shares): Purchased under the registrant's employee stock purchase plan.
Footnote F2 (price): Represents 85% of the closing price of the registrant's common stock on January 2, 2026, the first day of the offering period under the employee stock purchase plan.
Footnote F4 (shares): On August 4, 2022, the reporting person was granted RSUs with both performance-based and service-based vesting conditions ("PRSUs") divided into three tranches. On August 7, 2025, KLA's Board of Directors and Compensation and Talent Committee determined that the performance… Full note on SEC EDGAR
Footnote F5 (shares): Pursuant to the terms of the grant, shares of KLA common stock were automatically withheld to cover required tax withholding on the 61,651.800 shares of KLA common stock that vested. The fair market value of KLA common stock used for purposes of calculating the number of shares… Full note on SEC EDGAR

Jun 11, 2026

Richard P. Wallace - Officer

Open-market sale

Common Stock

4,512^{footnote F1}

$221.34

$9.99M

Footnote F1 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on November 19, 2025.

May 12, 2026

Richard P. Wallace - Officer

Open-market sale

Common Stock

4,512^{footnote F1}

$179.40

$8.09M

Footnote F1 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on November 19, 2025.

May 11, 2026

Virendra A. Kirloskar - Officer

Open-market sale

Common Stock

297

$187.90

$558K

May 11, 2026

Jeneanne Michelle Hanley

Open-market sale

Common Stock

550

$1,874.71^{footnote F1}

$1.03M

Footnote F1 (price): Represents the weighted average sales price for the shares. The sales prices ranged from $1,874.64 to $1,875.08. The Reporting Person will provide upon request full information regarding the number of shares sold at each separate price.

Feb 5, 2026

Robert Calderoni

Grant or award

Common Stock

11.27^{footnote F1}

$0.00

Footnote F1 (shares): On February 5, 2026, the Reporting Person received a grant of restricted stock units ("RSUs") for 11.269 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) February 5, 2027, (ii) immediately prior to the next annual meeting of stockholders, and (iii) ten… Full note on SEC EDGAR

Dec 16, 2025

Bren D. Higgins - Officer

Open-market sale

Common Stock

2,254^{footnote F1}

$123.70

$2.79M

Footnote F1 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on May 5, 2025.

Nov 12, 2025

Ahmad A. Khan - Officer

Gift

Common Stock

$0.00

Nov 11, 2025

Richard P. Wallace - Officer

Open-market sale

Common Stock

10,803^{footnote F1}

$120.31

$13.00M

Nov 11, 2025

Richard P. Wallace - Officer

Gift

Common Stock

804^{footnote F3}

$0.00

Footnote F1 (shares): This sale was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on November 1, 2024.
Footnote F3 (shares): This gift was effected pursuant to the terms of a Rule 10b5-1 trading plan adopted by the Reporting Person on November 1, 2024.

Nov 5, 2025

Tracy A. Embree

Grant or award

Common Stock

203.73^{footnote F1}

$0.00

Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR

Nov 5, 2025

Jason Conley

Grant or award

Common Stock

203.73^{footnote F1}

$0.00

Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR

Nov 5, 2025

Robert Calderoni

Grant or award

Common Stock

256.7^{footnote F1}

$0.00

Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 256.702 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR

Nov 5, 2025

Michael R. McMullen

Grant or award

Common Stock

203.73^{footnote F1}

$0.00

Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR

Nov 5, 2025

Susan J.S. Taylor

Grant or award

Common Stock

203.73^{footnote F1}

$0.00

Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR

Nov 5, 2025

Victor Peng

Grant or award

Common Stock

203.73^{footnote F1}

$0.00

Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR

Nov 5, 2025

Kevin Kennedy

Grant or award

Common Stock

203.73^{footnote F1}

$0.00

Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR

Nov 5, 2025

Jeneanne Michelle Hanley

Grant or award

Common Stock

203.73^{footnote F1}

$0.00

Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR

Nov 5, 2025

Jamie Samath

Grant or award

Common Stock

203.73^{footnote F1}

$0.00

Footnote F1 (shares): On November 5, 2025, the Reporting Person received an automatic grant of restricted stock units ("RSUs") for 203.732 shares of KLA common stock. The RSUs vest on the earliest to occur of (i) November 5, 2026, (ii) immediately prior to the next annual meeting of stockholders, and… Full note on SEC EDGAR

Sep 5, 2025

Ahmad A. Khan - Officer

Open-market sale

Common Stock

4,564

$90.00

$4.11M

Aug 29, 2025

Ahmad A. Khan - Officer

Open-market sale

Common Stock

13,716

$88.15

$12.09M

Aug 20, 2025

Bren D. Higgins - Officer

Open-market sale

Common Stock

2,301

$87.85

$2.02M

Filed

Filer

Relationship

Market value

Notice

Sep 15, 2026

WALLACE RICHARD P

Officer, Director

72,019

$12.38M

View on EDGAR

Aug 13, 2026

Lorig Brian

Officer

59,586

Member	Type	Traded	Disclosed	Value range	Owner	Days to disclose	Filing
Michael A. RulliRepublican, OH-06	Purchase

Member

Type

Traded

Disclosed

Value range

Owner

Days to disclose

Filing

Michael A. RulliRepublican, OH-06

Purchase