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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
928421	Mattson Technology Inc	MTSN	Special Industry Machinery, Nec (3559)	770208119

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1184940	Kenneth S Kannappan	47131 Bayside Parkway Fremont CA 94538		Yes	No	No	No

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	2013-04-29	63,751	$1.58	73,551	No	4	P	Direct
Common Stock	Acquisiton	2013-04-30	36,249	$1.55	109,800	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Direct
No	4	P	Direct

Footnotes

This is the weighted average purchase price. Shares were purchased in multiple transactions at prices ranging between $1.50 and $1.65. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this Form 4.
This is the weighted average purchase price. Shares were purchased in multiple transactions at prices ranging between $1.54 and $1.56. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this Form 4.