Insider Stock Trading History of Porterfield Robert


The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Porterfield Robert since year 2005. The trader's CIK number is 1307795. At the time of this reporting, Porterfield Robert is the Vice President of National Instruments Corp /de/ . (stock ticker symbol NATI). See this page for all insider trading activities at National Instruments Corp /de/ .


Stock purchases, sales, and option exercises reported by insider Porterfield Robert since 2005.
  Trade Date   Symbol Company Name (Issuer) Trade Type     Shares       Price ($)   Value ($)
2011-08-01 NATI National Instruments Corp /de/ Option Ex 633 21.96 13,903
2011-05-01 NATI National Instruments Corp /de/ Option Ex 12,518 .00 0
2011-05-02 NATI National Instruments Corp /de/ Option Ex 297 23.98 7,120
2011-02-28 NATI National Instruments Corp /de/ Sale 8,514 31.18 265,492
2011-02-01 NATI National Instruments Corp /de/ Option Ex 234 29.56 6,915
2010-11-02 NATI National Instruments Corp /de/ Sale 15,000 34.75 521,250
2010-11-02 NATI National Instruments Corp /de/ Option Ex 12,000 21.04 252,504
2010-11-01 NATI National Instruments Corp /de/ Option Ex 61 27.12 1,654
2010-05-03 NATI National Instruments Corp /de/ Option Ex 265 24.98 6,620
2010-08-02 NATI National Instruments Corp /de/ Option Ex 238 27.12 6,453
2010-05-01 NATI National Instruments Corp /de/ Option Ex 5,000 .00 0
2010-02-01 NATI National Instruments Corp /de/ Option Ex 263 22.70 5,968
2010-03-19 NATI National Instruments Corp /de/ Option Ex 9,000 32.08 288,747
2009-08-03 NATI National Instruments Corp /de/ Option Ex 318 18.73 5,957
2009-11-02 NATI National Instruments Corp /de/ Option Ex 64 21.43 1,371
2009-05-01 NATI National Instruments Corp /de/ Option Ex 5,415 6.08 32,939
2009-02-02 NATI National Instruments Corp /de/ Option Ex 357 18.25 6,514
2008-11-03 NATI National Instruments Corp /de/ Option Ex 171 21.59 3,691
2008-08-08 NATI National Instruments Corp /de/ Option Ex 6,750 12.22 82,498
2008-08-08 NATI National Instruments Corp /de/ Sale 6,750 35.23 237,802
2008-08-01 NATI National Instruments Corp /de/ Option Ex 501 25.01 12,528
2008-05-01 NATI National Instruments Corp /de/ Option Ex 4,662 15.22 70,955
2008-02-13 NATI National Instruments Corp /de/ Option Ex 13,950 15.30 213,504
2007-11-01 NATI National Instruments Corp /de/ Option Ex 419 27.47 11,510
2007-08-01 NATI National Instruments Corp /de/ Option Ex 515 23.68 12,195
2007-11-29 NATI National Instruments Corp /de/ Sale 8,000 33.16 265,240
2007-08-30 NATI National Instruments Corp /de/ Sale 10,007 30.93 309,476
2007-05-01 NATI National Instruments Corp /de/ Option Ex 3,337 15.79 52,681
2007-02-09 NATI National Instruments Corp /de/ Option Ex 10,007 9.63 96,357
2007-02-02 NATI National Instruments Corp /de/ Sale 7,880 129.84 1,023,154
2007-02-02 NATI National Instruments Corp /de/ Option Ex 7,880 9.63 75,876
2007-02-01 NATI National Instruments Corp /de/ Option Ex 490 24.49 11,999
2006-11-01 NATI National Instruments Corp /de/ Option Ex 482 23.59 11,368
2006-08-01 NATI National Instruments Corp /de/ Option Ex 625 23.59 14,741
2006-05-01 NATI National Instruments Corp /de/ Option Ex 1,638 .00 0
2006-04-03 NATI National Instruments Corp /de/ Option Ex 1,039 20.94 21,760
2006-01-30 NATI National Instruments Corp /de/ Option Ex 8,157 5.93 48,338
2006-01-30 NATI National Instruments Corp /de/ Sale 8,157 35.00 285,495
2005-08-03 NATI National Instruments Corp /de/ Sale 6,555 29.00 190,095
2005-05-20 NATI National Instruments Corp /de/ Sale 915 23.06 21,099

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Porterfield Robert (Vice President of National Instruments Corp /de/ at the time of this reporting) see the Securities and Exchange Commission (SEC) website.