Ownership Submission

FORM 4

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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3235-0287

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(Print or Type Responses)

1. Name and Address of Reporting Person ^*

Levy Asher

2. Issuer Name and Ticker or Trading Symbol
KLA TENCOR CORP [KLAC]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

_____ Director	_____ 10% Owner
__X__ Officer (give title below)	_____ Other (specify below)
CEO - Orbotech Ltd.

(Last)

(First)

(Middle)

ONE TECHNOLOGY DRIVE

3. Date of Earliest Transaction (Month/Day/Year)
02/20/2019

(Street)

MILPITAS, CA 95035

4. If Amendment, Date Original Filed(Month/Day/Year)

6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

(City)

(State)

(Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	02/20/2019		A		26,273 ⁽¹⁾	A	$ 0	26,273	D
Common Stock	02/20/2019		A		317 ⁽²⁾	A	$ 0	26,590	D
Common Stock	02/20/2019		A		757 ⁽³⁾	A	$ 0	27,347	D
Common Stock - Restricted Stock Units ⁽⁴⁾	02/20/2019		A		16,715 ⁽⁵⁾	A	$ 0	16,715 ⁽⁶⁾	D
Common Stock - Restricted Stock Units ⁽⁴⁾	02/20/2019		A		2,985 ⁽⁷⁾	A	$ 0	19,700 ⁽⁶⁾	D
Common Stock - Restricted Stock Units ⁽⁴⁾	02/20/2019		A		995 ⁽⁸⁾	A	$ 0	20,695 ⁽⁶⁾	D
Common Stock - Restricted Stock Units ⁽⁴⁾	02/20/2019		A		3,338 ⁽⁹⁾	A	$ 0	24,033 ⁽⁶⁾	D
Common Stock - Restricted Stock Units ⁽⁴⁾	02/20/2019		A		1,390 ⁽¹⁰⁾	A	$ 0	25,423 ⁽⁶⁾	D
Common Stock - Restricted Stock Units ⁽⁴⁾	02/20/2019		A		6,676 ⁽¹¹⁾	A	$ 0	32,099 ⁽⁶⁾	D
Common Stock - Restricted Stock Units ⁽⁴⁾	02/20/2019		A		5,575 ⁽¹²⁾	A	$ 0	37,674 ⁽⁶⁾	D
Common Stock - Restricted Stock Units ⁽⁴⁾	02/20/2019		A		2,323 ⁽¹³⁾	A	$ 0	39,997 ⁽⁶⁾	D
Common Stock - Restricted Stock Units ⁽⁴⁾	02/20/2019		A		2,911 ⁽¹⁴⁾	A	$ 0	42,908 ⁽⁶⁾	D
Common Stock - Restricted Stock Units ⁽⁴⁾	02/20/2019		A		1,213 ⁽¹⁵⁾	A	$ 0	44,121 ⁽⁶⁾	D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.		SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security
(Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code
(Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date
(Month/Day/Year)

7. Title and Amount of Underlying Securities
(Instr. 3 and 4)

8. Price of Derivative Security
(Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)

11. Nature of Indirect Beneficial Ownership
(Instr. 4)

Code

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Non-Qualified Stock Option (Right to Buy)

$ 103.05

02/20/2019

2,576 ⁽¹⁶⁾

06/21/2020⁽¹⁷⁾

06/20/2025

Common Stock

2,576.00

$ 0

2,576

Non-Qualified Stock Option (Right to Buy)

$ 53.81

02/20/2019

4,901 ⁽¹⁸⁾

06/29/2019⁽¹⁹⁾

06/28/2024

Common Stock

4,901.00

$ 0

4,901

Non-Qualified Stock Option (Right to Buy)

$ 44.94

02/20/2019

3,174 ⁽²⁰⁾

09/12/2019⁽²¹⁾

09/11/2023

Common Stock

3,174.00

$ 0

3,174

Reporting Owners

Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Levy Asher ONE TECHNOLOGY DRIVE MILPITAS, CA 95035			CEO - Orbotech Ltd.

Signatures

/s/ Jeffrey Cannon, attorney-in-fact		02/21/2019
^**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Received in exchange for 105,095 ordinary shares of Orbotech Ltd. in connection with the merger (the "Merger") of Tiburon Merger Sub Technologies Ltd. with and into Orbotech Ltd. Pursuant to the agreement governing the merger, each Orbotech ordinary share is entitled to receive $38.86 and 0.25 of a share of KLA-Tencor Corporation common stock, with cash in lieu of a fractional share.
(2)	Received in exchange for 1,666 vested options to purchase Orbotech Ltd. ordinary shares at an exercise price of $15.57 per ordinary share in connection with the Merger.
(3)	Received in exchange for 5,197 vested options to purchase Orbotech Ltd. ordinary shares at an exercise price of $27.45 per ordinary share in connection with the Merger.
(4)	Each restricted stock unit ("RSU") represents a contingent right to receive one share of KLA-Tencor common stock.
(5)	On February 20, 2019 the reporting person received a grant of RSUs which vest as to 50% of the award on July 1, 2019 and as to the remaining 50% of the award on December 31, 2019, subject to continued service.
(6)	Does not include performance-based RSUs, if any, held by the Reporting Person for which an assessment has not yet been made regarding the achievement of the applicable performance goals. Any such holdings will be reported on a Form 4 within two business days of the date such assessment is made.
(7)	Assumed by KLA-Tencor Corporation in connection with the Merger. Formerly represented unvested restricted stock units for 4,887 ordinary shares of Orbotech Ltd. The RSUs vest in full on August 3, 2019.
(8)	Assumed by KLA-Tencor Corporation in connection with the Merger. Formerly represented unvested restricted stock units for 1,629 ordinary shares of Orbotech Ltd. The RSUs vest in full on August 3, 2019.
(9)	Assumed by KLA-Tencor Corporation in connection with the Merger. Formerly represented unvested restricted stock units for 5,464 ordinary shares of Orbotech Ltd. The RSU vests as to 50% of the underlying shares on each of September 12, 2019 and September 12, 2020.
(10)	Assumed by KLA-Tencor Corporation in connection with the Merger. Formerly represented unvested restricted stock units for 2,276 ordinary shares of Orbotech Ltd. The RSU vests as to 50% of the underlying shares on each of September 12, 2019 and September 12, 2020.
(11)	Assumed by KLA-Tencor Corporation in connection with the Merger. Formerly represented unvested restricted stock units for 10,928 ordinary shares of Orbotech Ltd. The RSU vests as to 50% of the underlying shares on each of September 12, 2019 and September 12, 2020.
(12)	Assumed by KLA-Tencor Corporation in connection with the Merger. Formerly represented unvested restricted stock units for 9,126 ordinary shares of Orbotech Ltd. The RSU vests as to 50% of the underlying shares on June 29, 2019 and 25% of the underlying shares on each of June 29, 2020 and 2021.
(13)	Assumed by KLA-Tencor Corporation in connection with the Merger. Formerly represented unvested restricted stock units for 3,803 ordinary shares of Orbotech Ltd. The RSU vests as to 50% of the underlying shares on June 29, 2019 and 25% of the underlying shares on each of June 29, 2020 and 2021.
(14)	Assumed by KLA-Tencor Corporation in connection with the Merger. Formerly represented unvested restricted stock units for 4,766 ordinary shares of Orbotech Ltd. The RSU vests as to 50% of the underlying shares on June 21, 2020 and 25% of the underlying shares on each of June 21, 2021 and 2022.
(15)	Assumed by KLA-Tencor Corporation in connection with the Merger. Formerly represented unvested restricted stock units for 1,986 ordinary shares of Orbotech Ltd. The RSU vests as to 50% of the underlying shares on June 21, 2020 and 25% of the underlying shares on each of June 21, 2021 and 2022.
(16)	Received in exchange for unvested options to purchase 4,217 Orbotech Ltd. ordinary shares at an exercise price of $62.95 per share in connection with the Merger.
(17)	Vests as to 50% of the underlying shares on June 21, 2020 and 25% of the underlying shares on each of June 21, 2021 and 2022.
(18)	Received in exchange for unvested options to purchase 8,024 Orbotech Ltd. ordinary shares at an exercise price of $32.87 per share in connection with the Merger.
(19)	Vests as to 50% of the underlying shares on June 29, 2019 and 25% of the underlying shares on each of June 29, 2020 and 2021.
(20)	Received in exchange for unvested options to purchase 5,196 Orbotech Ltd. ordinary shares at an exercise price of $27.45 per share in connection with the Merger.
(21)	Vests as to 50% of the underlying shares on each of September 12, 2019 and 2020.

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