Porterfield Robert 4
4 · NATIONAL INSTRUMENTS CORP /DE/ · Filed Mar 2, 2011
Insider Transaction Report
Form 4
Porterfield Robert
Vice President
Transactions
- Exercise/Conversion
Common Stock
2011-02-01$29.55/sh+234$6,916→ 48,085 total(indirect: By Spouse) - Sale
Common Stock
2011-02-28$31.18/sh−8,514$265,493→ 63,613 total
Footnotes (2)
- [F1]Acquisition of stock under Issuer's employee stock purchase plan.
- [F2]On February 22, 2011, the common stock of National Instruments Corporation split 3-for-2, resulting in the reporting person's ownership of 24,042 additional shares of common stock.