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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
319201	Kla Tencor Corp	KLAC	Optical Instruments & Lenses (3827)	042564110

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1142615	W Edward Barnholt	C/O Kla-Tencor Corporation One Technology Drive Milpitas CA 95035		Yes	No	No	Yes

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2012-05-02	5,000	$37.05	44,167	No	4	M	Indirect	By Trust
Common Stock	Acquisiton	2012-05-02	5,000	$37.05	49,167	No	4	M	Indirect	By Trust
Common Stock	Acquisiton	2012-05-02	2,500	$51.35	51,667	No	4	M	Indirect	By Trust
Common Stock	Acquisiton	2012-05-02	1,250	$49.99	52,917	No	4	M	Indirect	By Trust
Common Stock	Disposition	2012-05-02	13,750	$51.82	39,167	No	4	S	Indirect	By Trust

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Indirect	By Trust
No	4	M	Indirect	By Trust
No	4	M	Indirect	By Trust
No	4	M	Indirect	By Trust
No	4	S	Indirect	By Trust

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (Right to Buy)	Disposition	2012-05-02	5,000	$0.00	5,000	$37.05
Common Stock	Non-Qualified Stock Option (Right to Buy)	Disposition	2012-05-02	5,000	$0.00	5,000	$37.05
Common Stock	Non-Qualified Stock Option (Right to Buy)	Disposition	2012-05-02	2,500	$0.00	2,500	$51.35
Common Stock	Non-Qualified Stock Option (Right to Buy)	Disposition	2012-05-02	1,250	$0.00	1,250	$49.99

Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
2012-11-08	No	4	M	Direct
2012-11-08	No	4	M	Direct
2012-08-02	No	4	M	Direct
2012-11-04	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock - Restricted Stock Units	3,809	Direct

Footnotes

By The Barnholt Family Trust dated January 8, 1987, of which the Reporting Person is a trustee and beneficiary.
This transaction was executed in multiple trades at prices ranging from $51.74 to $52.00. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer, full information regarding the number of shares and prices at which the transaction was effected.
Each restricted stock unit ("RSU") represents a contingent right to receive one share of KLA-Tencor common stock.
The option was granted for 5,000 shares of KLA-Tencor common stock on November 8, 2002 and was immediately exercisable for all of the underlying shares on the date of grant.
The option was granted for 5,000 shares of KLA-Tencor common stock on November 8, 2002 and was immediately exercisable for all of the underlying shares on the date of grant.
The option was granted for 2,500 shares of KLA-Tencor common stock on August 2, 2005 and was immediately exercisable for all of the underlying shares on the date of grant.
The option was granted for 1,250 shares of KLA-Tencor common stock on November 4, 2005 and was immediately exercisable for all of the underlying shares on the date of grant.