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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
935494	National Instruments Corp	NATI	Services-Prepackaged Software (7372)	741871327

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1008357	L Jeffrey Kodosky	C/O National Instruments Corp 11500 N. Mopac Expressway Austin TX 78759		Yes	No	No	No

Transaction Summary

Sold:	8,000 shares	Avg. Price: $25.57	Total Value: $204,540.00
Number of Shares After Transactions:	835,827 shares

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	Disposition	2011-12-27	4,000	$25.57	835,826	No	4	S	Direct
Common Stock	Disposition	2011-12-27	4,000	$25.57	835,827	No	4	S	Indirect	by Spouse

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	S	Indirect	by Spouse

Footnotes

Shares were sold under Reporting Person's 10(b)5-1 Plan.
On February 22, 2011, the common stock of National Instruments Corporation split 3-for-2, resulting in the reporting person's ownership of 297,275 shares of common stock instead of the 299,135 as reported on March 2, 2011 in footnote 2.
On February 22, 2011, the common stock of National Instruments Corporation split 3-for-2, resulting in the reporting person's ownership of 297,275 shares of common stock instead of the 299,135 as reported on March 2, 2011 in footnote 2.