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KLAC US​

Kla Corp(KLAC US)

$145.61-2.221.50%Ext:$145.89+0.280.20%(Market Closed · 00:00:00 UTC)

Overview

ProfileEntity Structure

Documents

SEC Filings
CategorizedChronologicalBy Owner

Financials & Metrics

FinancialsChartingShort InterestEmployees

SEC Filings by Owner

Insider Ownership

WALLACE RICHARD P(155)

  • 4Statement of changes in beneficial ownership16 Sep
  • 4Statement of changes in beneficial ownership12 Aug
  • 4Statement of changes in beneficial ownership10 Aug
  • 4Statement of changes in beneficial ownership7 Aug
  • 4Statement of changes in beneficial ownership4 Aug
  • 4Statement of changes in beneficial ownership3 Aug
  • 4Statement of changes in beneficial ownership2 Jul
  • 4Statement of changes in beneficial ownership11 Jun
  • 4Statement of changes in beneficial ownership12 May
  • 4Statement of changes in beneficial ownership13 Nov 2025

Kirloskar Virendra A(127)

  • 4Statement of changes in beneficial ownership11 Aug
  • 4Statement of changes in beneficial ownership10 Aug
  • 4Statement of changes in beneficial ownership7 Aug
  • 4Statement of changes in beneficial ownership5 Aug
  • 4Statement of changes in beneficial ownership4 Aug
  • 4Statement of changes in beneficial ownership3 Aug
  • 4Statement of changes in beneficial ownership6 Jul
  • 4Statement of changes in beneficial ownership12 May
  • 4Statement of changes in beneficial ownership12 Aug 2025
  • 4Statement of changes in beneficial ownership8 Aug 2025

Higgins Bren D.(112)

  • 4Statement of changes in beneficial ownership13 Aug
  • 4Statement of changes in beneficial ownership10 Aug
  • 4Statement of changes in beneficial ownership7 Aug
  • 4Statement of changes in beneficial ownership4 Aug
  • 4Statement of changes in beneficial ownership3 Aug
  • 4Statement of changes in beneficial ownership6 Jul
  • 4Statement of changes in beneficial ownership2 Jul
  • 4Statement of changes in beneficial ownership18 Dec 2025
  • 4Statement of changes in beneficial ownership22 Aug 2025
  • 4Statement of changes in beneficial ownership8 Aug 2025

Khan Ahmad A.(95)

  • 4Statement of changes in beneficial ownership12 Aug
  • 4Statement of changes in beneficial ownership10 Aug
  • 4Statement of changes in beneficial ownership7 Aug
  • 4Statement of changes in beneficial ownership4 Aug
  • 4Statement of changes in beneficial ownership3 Aug
  • 4Statement of changes in beneficial ownership2 Jul
  • 4Statement of changes in beneficial ownership14 Nov 2025
  • 4Statement of changes in beneficial ownership9 Sep 2025
  • 4Statement of changes in beneficial ownership2 Sep 2025
  • 4Statement of changes in beneficial ownership8 Aug 2025

Lorig Brian(79)

  • 4Statement of changes in beneficial ownership14 Aug
  • 4Statement of changes in beneficial ownership10 Aug
  • 4Statement of changes in beneficial ownership7 Aug
  • 4Statement of changes in beneficial ownership4 Aug
  • 4Statement of changes in beneficial ownership3 Aug
  • 4Statement of changes in beneficial ownership2 Jul
  • 4Statement of changes in beneficial ownership14 Aug 2025
  • 4Statement of changes in beneficial ownership8 Aug 2025
  • 4Statement of changes in beneficial ownership7 Aug 2025
  • 4Statement of changes in beneficial ownership5 Aug 2025

Bell Bobby R(68)

  • 4Statement of changes in beneficial ownership5 Feb 2018
  • 4Statement of changes in beneficial ownership14 Nov 2017
  • 4Statement of changes in beneficial ownership3 Oct 2017
  • 4Statement of changes in beneficial ownership8 Sep 2017
  • 4Statement of changes in beneficial ownership5 Sep 2017
  • 4Statement of changes in beneficial ownership22 Aug 2017
  • 4Statement of changes in beneficial ownership9 Aug 2017
  • 4Statement of changes in beneficial ownership8 Aug 2017
  • 4Statement of changes in beneficial ownership4 Aug 2017
  • 4Statement of changes in beneficial ownership13 Jun 2017

BARNHOLT EDWARD W(48)

  • 4Statement of changes in beneficial ownership12 Aug 2022
  • 4Statement of changes in beneficial ownership5 Nov 2021
  • 4Statement of changes in beneficial ownership6 Nov 2020
  • 4Statement of changes in beneficial ownership24 Feb 2020
  • 4Statement of changes in beneficial ownership7 Nov 2019
  • 4Statement of changes in beneficial ownership9 Nov 2018
  • 4Statement of changes in beneficial ownership5 Nov 2018
  • 4Statement of changes in beneficial ownership6 Sep 2018
  • 4Statement of changes in beneficial ownership17 Nov 2017
  • 4Statement of changes in beneficial ownership2 Nov 2017

Trafas Brian M.(47)

  • 4Statement of changes in beneficial ownership3 Feb 2020
  • 4Statement of changes in beneficial ownership21 Nov 2019
  • 4Statement of changes in beneficial ownership13 Nov 2019
  • 4Statement of changes in beneficial ownership5 Nov 2019
  • 4Statement of changes in beneficial ownership8 Aug 2019
  • 4Statement of changes in beneficial ownership7 Aug 2019
  • 4Statement of changes in beneficial ownership6 Aug 2019
  • 4Statement of changes in beneficial ownership3 Jul 2019
  • 4Statement of changes in beneficial ownership5 Feb 2019
  • 4Statement of changes in beneficial ownership14 Nov 2018

BOND ROBERT T(43)

  • 4ANNUAL DIRECTOR RSU GRANT5 Nov 2014
  • 4OPTION EXERCISE NO SALE21 Oct 2014
  • 4OPTION EXERCISE AND HOLD7 Oct 2014
  • 4OPTION EXERCISE1 Aug 2014
  • 4OPTION EXERCISE5 May 2014
  • 4STOCK OPTION EXERCISES7 Feb 2014
  • 4OUTSIDE DIRECTOR RSU GRANT6 Nov 2013
  • 4OPTION EXERCISE AND SALE31 Oct 2013
  • 4OPTION EXERCISE AND SALE13 Jun 2013
  • 4EXERCISE OF OPTION1 May 2013

LEVY KENNETH(40)

  • 4PRIMARY DOCUMENT27 Feb 2007
  • 4/APRIMARY DOCUMENT27 Feb 2007
  • 4PRIMARY DOCUMENT12 Feb 2007
  • 4PRIMARY DOCUMENT18 Oct 2006
  • 5PRIMARY DOCUMENT14 Aug 2006
  • 5/APRIMARY DOCUMENT17 Aug 2006
  • 4PRIMARY DOCUMENT27 Feb 2006
  • 4PRIMARY DOCUMENT18 Nov 2005
  • 4PRIMARY DOCUMENT8 Nov 2005
  • 4PRIMARY DOCUMENT27 Sep 2005

Donzella Oreste(39)

  • 4Statement of changes in beneficial ownership26 Jul 2024
  • 4Statement of changes in beneficial ownership27 Mar 2024
  • 4Statement of changes in beneficial ownership22 Mar 2024
  • 4Statement of changes in beneficial ownership7 Sep 2023
  • 4Statement of changes in beneficial ownership8 Aug 2023
  • 4Statement of changes in beneficial ownership7 Aug 2023
  • 4Statement of changes in beneficial ownership3 Aug 2023
  • 4Statement of changes in beneficial ownership4 Apr 2023
  • 4Statement of changes in beneficial ownership22 Mar 2023
  • 4Statement of changes in beneficial ownership6 Dec 2022

KAUFMAN STEPHEN P(36)

  • 4OPTION EXERCISES AND SALES2 Dec 2013
  • 4OUTSIDE DIRECTOR RSU GRANT6 Nov 2013
  • 4STOCK OPTION EXERCISES31 Oct 2013
  • 4OPTION EXERCISES1 Feb 2013
  • 4OPTION EXERCISE31 Jan 2013
  • 4ANNUAL RSU GRANT9 Nov 2012
  • 4NQ EXERCISE AND SALE17 Feb 2012
  • 4NOVEMBER 2011 RSU GRANT AND VESTING4 Nov 2011
  • 4Statement of changes in beneficial ownership3 Nov 2010
  • 4Statement of changes in beneficial ownership5 Nov 2009

KENNEDY KEVIN(35)

  • 4Statement of changes in beneficial ownership7 Nov 2025
  • 4Statement of changes in beneficial ownership8 Nov 2024
  • 4Statement of changes in beneficial ownership3 Nov 2023
  • 4Statement of changes in beneficial ownership4 Nov 2022
  • 4Statement of changes in beneficial ownership5 Nov 2021
  • 4Statement of changes in beneficial ownership3 Feb 2021
  • 4Statement of changes in beneficial ownership6 Nov 2020
  • 4Statement of changes in beneficial ownership4 Nov 2020
  • 4Statement of changes in beneficial ownership5 Aug 2020
  • 4Statement of changes in beneficial ownership12 May 2020

URBANEK LIDA(34)

  • 4Statement of changes in beneficial ownership24 Jul 2008
  • 4NOV 2007 - URBANEK RSU19 Nov 2007
  • 4Statement of changes in beneficial ownership1 Nov 2007
  • 4/AStatement of changes in beneficial ownership (amendment)1 Nov 2007
  • 4Statement of changes in beneficial ownership2 Aug 2007
  • 4Statement of changes in beneficial ownership20 Jul 2007
  • 4PRIMARY DOCUMENT3 May 2007
  • 4/AStatement of changes in beneficial ownership (amendment)1 Nov 2007
  • 4PRIMARY DOCUMENT30 Mar 2007
  • 4PRIMARY DOCUMENT15 Feb 2007

Martin Brian(34)

  • 4Statement of changes in beneficial ownership10 Sep 2015
  • 4Statement of changes in beneficial ownership8 Sep 2015
  • 4Statement of changes in beneficial ownership12 Aug 2015
  • 4Statement of changes in beneficial ownership11 Aug 2015
  • 4Statement of changes in beneficial ownership10 Aug 2015
  • 4/AStatement of changes in beneficial ownership (amendment)10 Aug 2015
  • 4Statement of changes in beneficial ownership7 Aug 2015
  • 4Statement of changes in beneficial ownership6 Aug 2015
  • 4Statement of changes in beneficial ownership4 Aug 2015
  • 4Statement of changes in beneficial ownership11 Aug 2014

CALDERONI ROBERT(33)

  • 4Statement of changes in beneficial ownership6 Feb
  • 4Statement of changes in beneficial ownership7 Nov 2025
  • 4Statement of changes in beneficial ownership8 Nov 2024
  • 4Statement of changes in beneficial ownership3 Nov 2023
  • 4Statement of changes in beneficial ownership4 Nov 2022
  • 4Statement of changes in beneficial ownership6 Sep 2022
  • 4Statement of changes in beneficial ownership5 Nov 2021
  • 4Statement of changes in beneficial ownership6 Nov 2020
  • 4Statement of changes in beneficial ownership7 Nov 2019
  • 4Statement of changes in beneficial ownership9 Nov 2018

Little Teri A.(32)

  • 4Statement of changes in beneficial ownership5 Jun 2020
  • 4Statement of changes in beneficial ownership26 Feb 2020
  • 4Statement of changes in beneficial ownership21 Nov 2019
  • 4Statement of changes in beneficial ownership13 Nov 2019
  • 4Statement of changes in beneficial ownership5 Nov 2019
  • 4Statement of changes in beneficial ownership5 Sep 2019
  • 4Statement of changes in beneficial ownership22 Aug 2019
  • 4Statement of changes in beneficial ownership7 Aug 2019
  • 4Statement of changes in beneficial ownership6 Aug 2019
  • 4Statement of changes in beneficial ownership5 Aug 2019

BINGHAM H RAYMOND(30)

  • 4Statement of changes in beneficial ownership19 Nov 2007
  • 4Statement of changes in beneficial ownership1 Nov 2007
  • 4/AStatement of changes in beneficial ownership (amendment)1 Nov 2007
  • 4Statement of changes in beneficial ownership2 Aug 2007
  • 4PRIMARY DOCUMENT4 May 2007
  • 4PRIMARY DOCUMENT4 May 2007
  • 4PRIMARY DOCUMENT4 May 2007
  • 4PRIMARY DOCUMENT3 May 2007
  • 4/AStatement of changes in beneficial ownership (amendment)1 Nov 2007
  • 4/APRIMARY DOCUMENT2 Apr 2007

SCHROEDER KENNETH L(29)

  • 4PRIMARY DOCUMENT9 Feb 2006
  • 4PRIMARY DOCUMENT30 Nov 2005
  • 4PRIMARY DOCUMENT4 Nov 2005
  • 4PRIMARY DOCUMENT27 Sep 2005
  • 4PRIMARY DOCUMENT23 Aug 2005
  • 5PRIMARY DOCUMENT12 Aug 2005
  • 4PRIMARY DOCUMENT28 Feb 2005
  • 4PRIMARY DOCUMENT6 Dec 2004
  • 4PRIMARY DOCUMENT6 Dec 2004
  • 4PRIMARY DOCUMENT20 Oct 2004

Wilkinson Mary Beth(28)

  • 4Statement of changes in beneficial ownership11 Aug
  • 4Statement of changes in beneficial ownership10 Aug
  • 4Statement of changes in beneficial ownership7 Aug
  • 4Statement of changes in beneficial ownership5 Aug
  • 4Statement of changes in beneficial ownership4 Aug
  • 4Statement of changes in beneficial ownership3 Aug
  • 4Statement of changes in beneficial ownership2 Jul
  • 4Statement of changes in beneficial ownership12 Aug 2025
  • 4Statement of changes in beneficial ownership8 Aug 2025
  • 4Statement of changes in beneficial ownership7 Aug 2025

ELKUS RICHARD J JR(26)

  • 4PRIMARY DOCUMENT30 Nov 2005
  • 4PRIMARY DOCUMENT22 Nov 2005
  • 4PRIMARY DOCUMENT6 Sep 2005
  • 4PRIMARY DOCUMENT3 Aug 2005
  • 4/APRIMARY DOCUMENT15 Aug 2005
  • 5PRIMARY DOCUMENT3 Aug 2005
  • 4PRIMARY DOCUMENT2 Jun 2005
  • 4PRIMARY DOCUMENT11 May 2005
  • 4PRIMARY DOCUMENT10 Mar 2005
  • 4PRIMARY DOCUMENT26 Jan 2005

Kirk Michael(26)

  • 4Statement of changes in beneficial ownership8 Feb 2017
  • 4Statement of changes in beneficial ownership14 Nov 2016
  • 4Statement of changes in beneficial ownership27 Oct 2016
  • 4Statement of changes in beneficial ownership9 Sep 2016
  • 4Statement of changes in beneficial ownership9 Aug 2016
  • 4Statement of changes in beneficial ownership8 Aug 2016
  • 4Statement of changes in beneficial ownership4 Aug 2016
  • 4Statement of changes in beneficial ownership10 Feb 2016
  • 4Statement of changes in beneficial ownership9 Feb 2016
  • 4Statement of changes in beneficial ownership23 Oct 2015

TOMPKINS JON D(24)

  • 4PRIMARY DOCUMENT8 Jan 2007
  • 4PRIMARY DOCUMENT1 Aug 2006
  • 5PRIMARY DOCUMENT11 Aug 2006
  • 4PRIMARY DOCUMENT2 May 2006
  • 4PRIMARY DOCUMENT1 Feb 2006
  • 4PRIMARY DOCUMENT7 Nov 2005
  • 4PRIMARY DOCUMENT29 Aug 2005
  • 4/APRIMARY DOCUMENT15 Aug 2005
  • 4PRIMARY DOCUMENT3 Aug 2005
  • 5PRIMARY DOCUMENT3 Aug 2005

KISPERT JOHN H(23)

  • 4Statement of changes in beneficial ownership21 Oct 2008
  • 4Statement of changes in beneficial ownership23 Sep 2008
  • 4Statement of changes in beneficial ownership7 Aug 2008
  • 4Statement of changes in beneficial ownership10 Aug 2007
  • 4/APRIMARY DOCUMENT30 Jan 2007
  • 4MAIN DOCUMENT DESCRIPTION29 Dec 2006
  • 5PRIMARY DOCUMENT14 Aug 2006
  • 4PRIMARY DOCUMENT21 Feb 2006
  • 4Statement of changes in beneficial ownership19 Dec 2005
  • 4PRIMARY DOCUMENT27 Sep 2005

Higashi Emiko(23)

  • 4Statement of changes in beneficial ownership8 Nov 2024
  • 4Statement of changes in beneficial ownership3 Nov 2023
  • 4Statement of changes in beneficial ownership4 Nov 2022
  • 4Statement of changes in beneficial ownership5 Nov 2021
  • 4Statement of changes in beneficial ownership6 Nov 2020
  • 4Statement of changes in beneficial ownership7 Nov 2019
  • 4Statement of changes in beneficial ownership13 Mar 2019
  • 4Statement of changes in beneficial ownership9 Nov 2018
  • 4Statement of changes in beneficial ownership5 Nov 2018
  • 4Statement of changes in beneficial ownership5 Feb 2018

Wang David C(22)

  • 4Statement of changes in beneficial ownership5 Nov 2018
  • 4Statement of changes in beneficial ownership6 Nov 2017
  • 4Statement of changes in beneficial ownership3 Nov 2016
  • 4Statement of changes in beneficial ownership6 Nov 2015
  • 4ANNUAL DIRECTOR RSU GRANT5 Nov 2014
  • 4OPTION EXERCISES27 Feb 2014
  • 4OUTSIDE DIRECTOR RSU GRANT6 Nov 2013
  • 4OPTION EXERCISE AND SALE10 Sep 2013
  • 4ANNUAL RSU GRANT9 Nov 2012
  • 4NOVEMBER 2011 RSU GRANT AND VESTING4 Nov 2011

PATEL KIRAN M(21)

  • 4Statement of changes in beneficial ownership4 Nov 2022
  • 4Statement of changes in beneficial ownership5 Nov 2021
  • 4Statement of changes in beneficial ownership6 Nov 2020
  • 4Statement of changes in beneficial ownership12 Aug 2020
  • 4Statement of changes in beneficial ownership7 Nov 2019
  • 4Statement of changes in beneficial ownership9 Nov 2018
  • 4Statement of changes in beneficial ownership5 Nov 2018
  • 4Statement of changes in beneficial ownership6 Nov 2017
  • 4Statement of changes in beneficial ownership22 Nov 2016
  • 4Statement of changes in beneficial ownership3 Nov 2016

DICKSON JOHN T(21)

  • 4Statement of changes in beneficial ownership7 Nov 2019
  • 4Statement of changes in beneficial ownership9 Nov 2018
  • 4Statement of changes in beneficial ownership5 Nov 2018
  • 4Statement of changes in beneficial ownership3 Nov 2017
  • 4Statement of changes in beneficial ownership4 Nov 2016
  • 4Statement of changes in beneficial ownership6 Nov 2015
  • 4ANNUAL DIRECTOR RSU GRANT5 Nov 2014
  • 4OPTION EXERCISES31 Jul 2014
  • 4OUTSIDE DIRECTOR RSU GRANT6 Nov 2013
  • 4ANNUAL RSU GRANT9 Nov 2012

DENTINGER MARK P(18)

  • 4AUGUST 8 10B5-1 SALE12 Aug 2013
  • 4AUGUST RSU RELEASE8 Aug 2013
  • 410B5-1 PLAN SALES7 Aug 2013
  • 4AUGUST 2013 ACTIVITIY6 Aug 2013
  • 4ESPP SHARE SALE3 Jul 2013
  • 410B5-1 PLAN SALE29 Jan 2013
  • 4RSU VESTING13 Nov 2012
  • 4RSU RELEASE7 Aug 2012
  • 4AUGUST 2, 2012 RSU ACTIVITY3 Aug 2012
  • 4Statement of changes in beneficial ownership5 Jan 2012

LAMB MAUREEN L(17)

  • 4/APRIMARY DOCUMENT30 Jun 2005
  • 4PRIMARY DOCUMENT29 Jun 2005
  • 4PRIMARY DOCUMENT27 May 2005
  • 4PRIMARY DOCUMENT6 Dec 2004
  • 4PRIMARY DOCUMENT23 Sep 2004
  • 4PRIMARY DOCUMENT9 Aug 2004
  • 5PRIMARY DOCUMENT10 Aug 2004
  • 4PRIMARY DOCUMENT27 Apr 2004
  • 4PRIMARY DOCUMENT29 Jan 2004
  • 4PRIMARY DOCUMENT28 Oct 2003

Glasser Lance A(15)

  • 4PRIMARY DOCUMENT12 Feb 2007
  • 4PRIMARY DOCUMENT8 Jan 2007
  • 5PRIMARY DOCUMENT11 Aug 2006
  • 4PRIMARY DOCUMENT1 Mar 2006
  • 4PRIMARY DOCUMENT3 Nov 2005
  • 4PRIMARY DOCUMENT27 Sep 2005
  • 4PRIMARY DOCUMENT14 Sep 2005
  • 4PRIMARY DOCUMENT22 Aug 2005
  • 5PRIMARY DOCUMENT11 Aug 2005
  • 4PRIMARY DOCUMENT6 Dec 2004

Hall Jeffrey(14)

  • 4Statement of changes in beneficial ownership8 Nov 2007
  • 4Statement of changes in beneficial ownership10 Aug 2007
  • 5PRIMARY DOCUMENT11 Aug 2006
  • 4PRIMARY DOCUMENT21 Feb 2006
  • 4PRIMARY DOCUMENT21 Nov 2005
  • 4PRIMARY DOCUMENT27 Sep 2005
  • 4PRIMARY DOCUMENT22 Aug 2005
  • 5PRIMARY DOCUMENT11 Aug 2005
  • 4PRIMARY DOCUMENT27 May 2005
  • 4PRIMARY DOCUMENT17 May 2005

RANGO ROBERT A.(14)

  • 4Statement of changes in beneficial ownership8 Nov 2024
  • 4Statement of changes in beneficial ownership3 Nov 2023
  • 4Statement of changes in beneficial ownership4 Nov 2022
  • 4Statement of changes in beneficial ownership5 Nov 2021
  • 4Statement of changes in beneficial ownership6 Nov 2020
  • 4Statement of changes in beneficial ownership7 Nov 2019
  • 4Statement of changes in beneficial ownership9 Nov 2018
  • 4Statement of changes in beneficial ownership5 Nov 2018
  • 4Statement of changes in beneficial ownership3 Jul 2018
  • 4Statement of changes in beneficial ownership2 Nov 2017

MOORE GARY B(14)

  • 4Statement of changes in beneficial ownership8 Nov 2024
  • 4Statement of changes in beneficial ownership3 Nov 2023
  • 4Statement of changes in beneficial ownership4 Nov 2022
  • 4Statement of changes in beneficial ownership5 Nov 2021
  • 4Statement of changes in beneficial ownership12 May 2021
  • 4Statement of changes in beneficial ownership6 Nov 2020
  • 4Statement of changes in beneficial ownership7 Nov 2019
  • 4Statement of changes in beneficial ownership9 Nov 2018
  • 4Statement of changes in beneficial ownership5 Nov 2018
  • 4Statement of changes in beneficial ownership2 Nov 2017

MARKS MICHAEL E(13)

  • 4PRIMARY DOCUMENT15 May 2006
  • 4PRIMARY DOCUMENT9 May 2006
  • 4PRIMARY DOCUMENT3 May 2006
  • 4PRIMARY DOCUMENT1 Feb 2006
  • 4PRIMARY DOCUMENT7 Nov 2005
  • 4/APRIMARY DOCUMENT15 Aug 2005
  • 4PRIMARY DOCUMENT3 Aug 2005
  • 5PRIMARY DOCUMENT3 Aug 2005
  • 4PRIMARY DOCUMENT11 May 2005
  • 4PRIMARY DOCUMENT26 Jan 2005

NICHOLS STUART J(13)

  • 5PRIMARY DOCUMENT11 Aug 2006
  • 4PRIMARY DOCUMENT20 Oct 2005
  • 4PRIMARY DOCUMENT27 Sep 2005
  • 5PRIMARY DOCUMENT11 Aug 2005
  • 4PRIMARY DOCUMENT23 Sep 2004
  • 4PRIMARY DOCUMENT9 Aug 2004
  • 5PRIMARY DOCUMENT10 Aug 2004
  • 4PRIMARY DOCUMENT27 Apr 2004
  • 4PRIMARY DOCUMENT29 Jan 2004
  • 4PRIMARY DOCUMENT28 Oct 2003

CAMPAGNA JOHN PETER(12)

  • 4PRIMARY DOCUMENT24 Nov 2003
  • 4PRIMARY DOCUMENT12 Nov 2003
  • 4PRIMARY DOCUMENT28 Oct 2003
  • 4/APRIMARY DOCUMENT1 Aug 2003
  • 4PRIMARY DOCUMENT31 Jul 2003
  • 5PRIMARY DOCUMENT7 Aug 2003
  • 4/APRIMARY DOCUMENT24 Jun 2003
  • 4PRIMARY DOCUMENT28 May 2003
  • 4Statement of changes in beneficial ownership5 May 2003
  • 4Statement of changes in beneficial ownership28 Feb 2003

COHEN AVI(12)

  • 4PRIMARY DOCUMENT8 Aug 2006
  • 5PRIMARY DOCUMENT11 Aug 2006
  • 4PRIMARY DOCUMENT16 Dec 2005
  • 4PRIMARY DOCUMENT27 Sep 2005
  • 5PRIMARY DOCUMENT12 Aug 2005
  • 4PRIMARY DOCUMENT20 Oct 2004
  • 4PRIMARY DOCUMENT23 Sep 2004
  • 4PRIMARY DOCUMENT9 Aug 2004
  • 5PRIMARY DOCUMENT10 Aug 2004
  • 4PRIMARY DOCUMENT27 Apr 2004

Hanley Jeneanne Michelle(12)

  • 4Statement of changes in beneficial ownership12 May
  • 4Statement of changes in beneficial ownership7 Nov 2025
  • 4Statement of changes in beneficial ownership8 Nov 2024
  • 4Statement of changes in beneficial ownership3 Nov 2023
  • 4Statement of changes in beneficial ownership8 Sep 2023
  • 4Statement of changes in beneficial ownership15 Dec 2022
  • 4Statement of changes in beneficial ownership4 Nov 2022
  • 4Statement of changes in beneficial ownership5 Nov 2021
  • 4Statement of changes in beneficial ownership6 Nov 2020
  • 4Statement of changes in beneficial ownership7 Nov 2019

FORTINO DENNIS J(11)

  • 4PRIMARY DOCUMENT27 Apr 2004
  • 4PRIMARY DOCUMENT30 Jan 2004
  • 4PRIMARY DOCUMENT29 Jan 2004
  • 4PRIMARY DOCUMENT28 Oct 2003
  • 4PRIMARY DOCUMENT30 Jul 2003
  • 4/APRIMARY DOCUMENT1 Aug 2003
  • 4PRIMARY DOCUMENT31 Jul 2003
  • 5PRIMARY DOCUMENT8 Aug 2003
  • 4PRIMARY DOCUMENT27 May 2003
  • 4/APRIMARY DOCUMENT26 Jun 2003

DICKERSON GARY E(10)

  • 4PRIMARY DOCUMENT27 Apr 2004
  • 4PRIMARY DOCUMENT29 Jan 2004
  • 4PRIMARY DOCUMENT28 Oct 2003
  • 4PRIMARY DOCUMENT18 Aug 2003
  • 4PRIMARY DOCUMENT31 Jul 2003
  • 4/APRIMARY DOCUMENT1 Aug 2003
  • 5PRIMARY DOCUMENT7 Aug 2003
  • 4PRIMARY DOCUMENT27 May 2003
  • 4/APRIMARY DOCUMENT25 Jun 2003
  • 4Statement of changes in beneficial ownership12 Nov 2002

PENG VICTOR(9)

  • 4Statement of changes in beneficial ownership7 Nov 2025
  • 4Statement of changes in beneficial ownership8 Nov 2024
  • 4Statement of changes in beneficial ownership3 Nov 2023
  • 4Statement of changes in beneficial ownership4 Nov 2022
  • 4Statement of changes in beneficial ownership5 Nov 2021
  • 4Statement of changes in beneficial ownership6 Nov 2020
  • 4Statement of changes in beneficial ownership7 Nov 2019
  • 4Statement of changes in beneficial ownership1 Feb 2019
  • 3Initial statement of beneficial ownership1 Feb 2019

YARBRO STAN(8)

  • 4PRIMARY DOCUMENT27 Oct 2004
  • 4PRIMARY DOCUMENT27 Oct 2004
  • 4PRIMARY DOCUMENT23 Sep 2004
  • 4PRIMARY DOCUMENT9 Aug 2004
  • 5PRIMARY DOCUMENT10 Aug 2004
  • 4PRIMARY DOCUMENT27 Apr 2004
  • 4PRIMARY DOCUMENT29 Jan 2004
  • 3PRIMARY DOCUMENT14 Nov 2003

Steimberg Amichai(8)

  • 4Statement of changes in beneficial ownership3 Jan 2020
  • 4Statement of changes in beneficial ownership12 Nov 2019
  • 4Statement of changes in beneficial ownership13 Sep 2019
  • 4Statement of changes in beneficial ownership5 Sep 2019
  • 4Statement of changes in beneficial ownership20 Aug 2019
  • 4Statement of changes in beneficial ownership7 Aug 2019
  • 4Statement of changes in beneficial ownership2 Jul 2019
  • 3Initial statement of beneficial ownership28 Mar 2019

AKINS ROBERT P(7)

  • 4ANNUAL RSU GRANT9 Nov 2012
  • 4NOVEMBER 2011 RSU GRANTS AND VESTINGS4 Nov 2011
  • 4Statement of changes in beneficial ownership3 Nov 2010
  • 4Statement of changes in beneficial ownership5 Nov 2009
  • 4Statement of changes in beneficial ownership13 Nov 2008
  • 4Statement of changes in beneficial ownership7 May 2008
  • 3Initial statement of beneficial ownership7 May 2008

MYERS MARIE(6)

  • 4Statement of changes in beneficial ownership3 Nov 2023
  • 4Statement of changes in beneficial ownership4 Nov 2022
  • 4Statement of changes in beneficial ownership5 Nov 2021
  • 4Statement of changes in beneficial ownership6 Nov 2020
  • 4Statement of changes in beneficial ownership12 Feb 2020
  • 3Initial statement of beneficial ownership12 Feb 2020

McMullen Michael R.(5)

  • 4Statement of changes in beneficial ownership7 Nov 2025
  • 4Statement of changes in beneficial ownership8 Nov 2024
  • 4Statement of changes in beneficial ownership3 Nov 2023
  • 4Statement of changes in beneficial ownership26 Jul 2023
  • 3Initial statement of beneficial ownership26 Jul 2023

Titinger Jorge(4)

  • 4Statement of changes in beneficial ownership10 Aug 2007
  • 4PRIMARY DOCUMENT10 May 2007
  • 3PRIMARY DOCUMENT5 Jan 2007
  • 3/APRIMARY DOCUMENT8 Jan 2007

Pinczuk Ana G.(4)

  • 4Statement of changes in beneficial ownership7 Nov 2019
  • 4Statement of changes in beneficial ownership9 Nov 2018
  • 3Initial statement of beneficial ownership3 Aug 2018
  • 4Statement of changes in beneficial ownership3 Aug 2018

KLA TENCOR CORP(3)

  • 4MAIN DOCUMENT DESCRIPTION25 May 2007
  • 3Initial statement of beneficial ownership17 Jan 2007
  • 3MAIN DOCUMENT DESCRIPTION6 Mar 2006

Samath Jamie(3)

  • 4Statement of changes in beneficial ownership7 Nov 2025
  • 4Statement of changes in beneficial ownership2 May 2025
  • 3Initial statement of beneficial ownership2 May 2025

Taylor Susan J.S.(3)

  • 4Statement of changes in beneficial ownership7 Nov 2025
  • 4Statement of changes in beneficial ownership12 May 2025
  • 3Initial statement of beneficial ownership12 May 2025

GROSS LAWRENCE A(2)

  • 4PRIMARY DOCUMENT3 Apr 2007
  • 3PRIMARY DOCUMENT25 Oct 2006

Tsai Bin-Ming Ben(2)

  • 4PRIMARY DOCUMENT15 Feb 2007
  • 3PRIMARY DOCUMENT3 Jan 2007

Embree Tracy A(2)

  • 3Initial statement of beneficial ownership7 Nov 2025
  • 4Statement of changes in beneficial ownership7 Nov 2025

Conley Jason(2)

  • 4Statement of changes in beneficial ownership7 Nov 2025
  • 3Initial statement of beneficial ownership7 Nov 2025

Levy Asher(2)

  • 4Statement of changes in beneficial ownership22 Feb 2019
  • 3Initial statement of beneficial ownership22 Feb 2019

≥5% Ownership

FMR LLC(23)

  • SC 13G/AKla Tencor Corp10 May 2012
  • SC 13G/AKla Tencor Corp14 Feb 2012
  • SC 13G/AKla Tencor Corp14 Feb 2011
  • SC 13G/AKla Tencor Corp10 Nov 2010
  • SC 13G/AKla Tencor Corp10 Aug 2010
  • SC 13G/AKla Tencor Corp16 Feb 2010
  • SC 13GKla Tencor Corp10 Aug 2009
  • SC 13G/AKla Tencor Corp10 Aug 2007
  • SC 13G/AKla Tencor Corp14 Feb 2007
  • SC 13G/AKla Tencor Corp14 Feb 2006

VANGUARD GROUP INC(15)

  • SC 13G/AKla Corp27 Mar
  • SC 13G/AKla Corp4 Oct 2024
  • SC 13G/AKla Corp13 Feb 2024
  • SC 13G/AKla Corp9 Feb 2023
  • SC 13G/AKla Corp10 Feb 2022
  • SC 13G/AKla Corp10 Feb 2021
  • SC 13G/AKla Corp12 Feb 2020
  • SC 13G/AKla Tencor Corp11 Feb 2019
  • SC 13G/AKla Tencor Corp8 Feb 2018
  • SC 13G/AKla Tencor Corp10 Jan 2017

BlackRock Inc.(15)

  • SC 13G/AKla Corp25 Jan 2024
  • SC 13GKla Corp30 Jan 2023
  • SC 13G/AKla Corp1 Feb 2022
  • SC 13G/AKla Corp29 Jan 2021
  • SC 13G/AKla Corp5 Feb 2020
  • SC 13G/AKla Tencor Corp6 Feb 2019
  • SC 13G/AKla Tencor Corp8 Feb 2018
  • SC 13G/AKla Tencor Corp25 Jan 2017
  • SC 13G/AKla Tencor Corp10 Feb 2016
  • SC 13G/AKla Tencor Corp9 Feb 2015

CAPITAL GROUP INTERNATIONAL INC(12)

  • SC 13G/AKla Tencor Corp10 Nov 2008
  • SC 13G/AKla Tencor Corp1 Feb 2008
  • SC 13G/AKla Tencor Corp12 Feb 2007
  • SC 13G/AKla Tencor Corp9 Feb 2006
  • SC 13G/AKla Tencor Corp14 Feb 2005
  • SC 13G/AKla Tencor Corp10 Sep 2004
  • SC 13G/AKla Tencor Corp13 Feb 2004
  • SC 13G/AKla Tencor Corp14 Feb 2003
  • SC 13G/AKla Tencor Corp10 Oct 2002
  • SC 13G/AKla Tencor Corp11 Feb 2002

Capital World Investors(11)

  • SC 13G/AKla Tencor Corp10 Aug 2016
  • SC 13G/AKla Tencor Corp12 Feb 2016
  • SC 13G/AKla Tencor Corp10 Dec 2015
  • SC 13G/AKla Tencor Corp13 Feb 2015
  • SC 13GKla Tencor Corp9 Oct 2014
  • SC 13G/AKla Tencor Corp8 Jun 2012
  • SC 13G/AKla Tencor Corp10 Feb 2012
  • SC 13G/AKla Tencor Corp14 Feb 2011
  • SC 13G/AKla Tencor Corp8 Oct 2010
  • SC 13G/AKla Tencor Corp11 Feb 2010

CAPITAL RESEARCH & MANAGEMENT CO(10)

  • SC 13G/AKla Tencor Corp13 Feb 2008
  • SC 13G/AKla Tencor Corp12 Feb 2007
  • SC 13G/AKla Tencor Corp10 Feb 2006
  • SC 13G/AKla Tencor Corp8 Jul 2005
  • SC 13G/AKla Tencor Corp14 Feb 2005
  • SC 13G/AKla Tencor Corp13 Feb 2004
  • SC 13G/AKla Tencor Corp14 Feb 2003
  • SC 13G/AKla Tencor Corp11 Feb 2002
  • SC 13G/AKla Tencor Corp12 Feb 2001
  • SC 13GKla Tencor Corp11 Feb 2000

PRIMECAP MANAGEMENT CO/CA/(10)

  • SC 13G/AKla Corp10 Feb 2022
  • SC 13G/AKla Corp8 Feb 2022
  • SC 13G/AKla Corp12 Feb 2021
  • SC 13G/AKla Corp12 Feb 2020
  • SC 13G/AKla Tencor Corp8 Feb 2019
  • SC 13G/AKla Tencor Corp27 Feb 2018
  • SC 13G/AKla Tencor Corp9 Feb 2017
  • SC 13G/AKla Tencor Corp12 Feb 2016
  • SC 13G/AKla Tencor Corp13 Feb 2015
  • SC 13GKla Tencor Corp7 Mar 2014

Capital Research Global Investors(10)

  • SC 13G/AKla Tencor Corp10 Dec 2015
  • SC 13G/AKla Tencor Corp13 Feb 2015
  • SC 13G/AKla Tencor Corp13 Feb 2014
  • SC 13G/AKla Tencor Corp13 Feb 2013
  • SC 13G/AKla Tencor Corp9 Feb 2012
  • SC 13G/AKla Tencor Corp11 Feb 2011
  • SC 13G/AKla Tencor Corp9 Feb 2010
  • SC 13G/AKla Tencor Corp13 Feb 2009
  • SC 13G/AKla Tencor Corp10 Jun 2008
  • SC 13GKla Tencor Corp12 Feb 2008

JPMORGAN CHASE & CO(7)

  • SC 13G/AKla Tencor Corp7 Nov 2017
  • SC 13G/AKla Tencor Corp19 Jan 2017
  • SC 13G/AKla Tencor Corp19 Jan 2016
  • SC 13G/AKla Tencor Corp7 Dec 2015
  • SC 13G/AKla Tencor Corp15 Jan 2015
  • SC 13G/AKla Tencor Corp7 Mar 2014
  • SC 13GKla Tencor Corp28 Jan 2014

JENNISON ASSOCIATES LLC(7)

  • SC 13G/AKla Tencor Corp10 Feb 2000
  • SC 13G/AKla Tencor Corp11 Feb 1999
  • SC 13G/AKla Tencor Corp12 Feb 1998
  • SC 13G/AKla Instruments Corp3 Feb 1997
  • SC 13G/AKla Instruments Corp10 Dec 1996
  • SC 13G/AKla Instruments Corp10 Dec 1996
  • SC 13G/AKla Instruments Corp10 Dec 1996

PRUDENTIAL INSURANCE CO OF AMERICA(7)

  • SC 13G/AKla Tencor Corp23 Jan 2001
  • SC 13G/AKla Tencor Corp31 Jan 2000
  • SC 13G/AKla Tencor Corp29 Jan 1999
  • SC 13G/AKla Tencor Corp9 Feb 1998
  • SC 13G/AKla Instruments Corp6 Feb 1997
  • SC 13G/AKla Instruments Corp10 Jun 1996
  • SC 13GKla Instruments Corp14 Feb 1996

AXA FINANCIAL INC(7)

  • SC 13G/AKla Tencor Corp9 Feb 2011
  • SC 13GKla Tencor Corp12 Feb 2010
  • SC 13G/AKla Tencor Corp13 Feb 2007
  • SC 13G/AKla Tencor Corp10 Jul 2006
  • SC 13G/AKla Tencor Corp10 Apr 2006
  • SC 13G/AKla Tencor Corp14 Feb 2006
  • SC 13GKla Tencor Corp14 Feb 2005

KLA TENCOR CORP(6)

  • SC 13DTherma Wave Inc18 Jan 2007
  • SC 13DAde Corp6 Mar 2006
  • SC 13DQc Optics Inc10 Sep 2001
  • SC 13DTencor Instruments24 Jan 1997
  • SC 13D/AMicrion Corp /Ma/6 Jun 1996
  • SC 13DMicrion Corp /Ma/17 May 1996

GROWTH FUND OF AMERICA INC(5)

  • SC 13G/AKla Tencor Corp13 Feb 2013
  • SC 13G/AKla Tencor Corp14 Feb 2012
  • SC 13G/AKla Tencor Corp14 Feb 2011
  • SC 13G/AKla Tencor Corp12 Feb 2010
  • SC 13GKla Tencor Corp12 Feb 2009

CAPITAL GROUP COMPANIES INC ET AL(5)

  • SC 13GKla Tencor Corp9 Jul 1998
  • SC 13GKla Tencor Corp10 Feb 1998
  • SC 13G/AKla Tencor Corp10 Sep 1997
  • SC 13G/AKla Instruments Corp12 Feb 1997
  • SC 13GKla Instruments Corp9 Aug 1996

JANUS CAPITAL MANAGEMENT LLC(4)

  • SC 13G/AKla Tencor Corp14 Feb 2011
  • SC 13G/AKla Tencor Corp16 Feb 2010
  • SC 13G/AKla Tencor Corp17 Feb 2009
  • SC 13GKla Tencor Corp14 Feb 2008

WELLINGTON MANAGEMENT GROUP LLP(4)

  • SC 13G/AKla Corp4 Feb 2021
  • SC 13G/AKla Corp27 Jan 2020
  • SC 13G/AKla Tencor Corp12 Feb 2019
  • SC 13GKla Tencor Corp8 Feb 2018

CAPITAL GUARDIAN TRUST CO(3)

  • SC 13GKla Tencor Corp12 Feb 1999
  • SC 13GKla Tencor Corp9 Nov 1998
  • SC 13GKla Tencor Corp9 Jul 1998

NEUBERGER BERMAN LLC(3)

  • SC 13G/AKla Tencor Corp11 Feb 1999
  • SC 13GKla Tencor Corp12 Feb 1998
  • SC 13GKla Instruments Corp11 Feb 1997

Capital International Investors(3)

  • SC 13G/AKla Corp13 Feb 2023
  • SC 13G/AKla Corp11 Feb 2022
  • SC 13GKla Corp16 Feb 2021

PRICE T ROWE ASSOCIATES INC /MD/(2)

  • SC 13G/AKla Tencor Corp6 Feb 2002
  • SC 13GKla Tencor Corp8 Feb 2001

STATE STREET CORP(2)

  • SC 13G/AKla Tencor Corp22 Feb 2016
  • SC 13GKla Tencor Corp12 Feb 2015

PUTNAM INVESTMENTS INC(2)

  • SC 13G/AKla Tencor Corp20 Feb 2001
  • SC 13GKla Tencor Corp17 Feb 2000

TENCOR INSTRUMENTS(1)

  • SC 13DKla Instruments Corp24 Jan 1997

TWENTIETH CENTURY COMPANIES INC(1)

  • SC 13G/AKla Instruments Corp9 Feb 1996

CHANCELLOR CAPITAL MANAGEMENT INC(1)

  • SC 13GKla Instruments Corp12 Feb 1996

VANGUARD CAPITAL MANAGEMENT LLC(1)

  • SC 13GKla Corp30 Apr