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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
730000	Supertex Inc	SUPX	Semiconductors & Related Devices (3674)	942328535

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1488150	Hernan Deguzman	10 Sam Chuk Street San Po Kong, Kowloon Hong Kong K3 000000	Vp, Marketing	No	Yes	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	2010-07-30	1,000	$17.06	1,000	No	4	M	Direct
Common Stock	Disposition	2010-07-30	1,000	$26.00	0	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	ISO Stock Options (to exercise common stock)	Disposition	2010-07-30	1,000	$17.06	1,000	$17.06

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
12,250	2007-09-01	2011-09-01	No	4	M	Direct

Footnotes

ISO Option (to exercise common stock). Exercise price: $17.06. Shares granted: 20,000. Shares exercised: 9,250. Shares currently exercising: 1,000. Shares exercisable: 9,750. Expiration date: 9/1/2011. Held Direct.
NQ Option (to exercise common stock). Exercise price: $33.95. Shares granted: 2,500. Shares exercised: 0. Shares exercisable: 1,000. 500 shares exercisable 12/3/2010. 500 shares exercisable 12/3/2011. 500 shares exercisable 12/3/2012. Expiration date: 12/3/2017. Held Direct.