The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) by Porterfield Robert since 2005.
The trader's CIK number is 1307795.
At the time of the last reporting, Porterfield Robert was the Vice President of National Instruments Corp. (stock ticker symbol NATI).
Also see all insider trading activities at National Instruments Corp.
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2011 | NATI | 0 | $0 | 8,514 | $265,492 | 13,682 | $27,938 |
| 2010 | NATI | 0 | $0 | 15,000 | $521,250 | 26,827 | $561,946 |
| 2009 | NATI | 0 | $0 | 0 | $0 | 6,154 | $46,781 |
| 2008 | NATI | 0 | $0 | 6,750 | $237,802 | 26,034 | $383,176 |
| 2007 | NATI | 0 | $0 | 25,887 | $1,597,870 | 22,648 | $260,618 |
| 2006 | NATI | 0 | $0 | 8,157 | $285,495 | 11,941 | $96,207 |
| 2005 | NATI | 0 | $0 | 7,470 | $211,194 | 0 | $0 |
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2011-08-01 | NATI | Option Ex | 633 | 21.96 | 13,903 |
| 2011-05-01 | NATI | Option Ex | 12,518 | .00 | 0 |
| 2011-05-02 | NATI | Option Ex | 297 | 23.98 | 7,120 |
| 2011-02-28 | NATI | Sale | 8,514 | 31.18 | 265,492 |
| 2011-02-01 | NATI | Option Ex | 234 | 29.55 | 6,915 |
| 2010-11-02 | NATI | Sale | 15,000 | 34.75 | 521,250 |
| 2010-11-02 | NATI | Option Ex | 12,000 | 21.04 | 252,504 |
| 2010-11-01 | NATI | Option Ex | 61 | 27.11 | 1,654 |
| 2010-05-03 | NATI | Option Ex | 265 | 24.98 | 6,620 |
| 2010-08-02 | NATI | Option Ex | 238 | 27.11 | 6,453 |
| 2010-05-01 | NATI | Option Ex | 5,000 | .00 | 0 |
| 2010-02-01 | NATI | Option Ex | 263 | 22.70 | 5,968 |
| 2010-03-19 | NATI | Option Ex | 9,000 | 32.08 | 288,747 |
| 2009-08-03 | NATI | Option Ex | 318 | 18.73 | 5,957 |
| 2009-11-02 | NATI | Option Ex | 64 | 21.43 | 1,371 |
| 2009-05-01 | NATI | Option Ex | 5,415 | 6.08 | 32,939 |
| 2009-02-02 | NATI | Option Ex | 357 | 18.25 | 6,514 |
| 2008-11-03 | NATI | Option Ex | 171 | 21.59 | 3,691 |
| 2008-08-08 | NATI | Option Ex | 6,750 | 12.22 | 82,498 |
| 2008-08-08 | NATI | Sale | 6,750 | 35.23 | 237,802 |
| 2008-08-01 | NATI | Option Ex | 501 | 25.01 | 12,528 |
| 2008-05-01 | NATI | Option Ex | 4,662 | 15.22 | 70,955 |
| 2008-02-13 | NATI | Option Ex | 13,950 | 15.30 | 213,504 |
| 2007-11-01 | NATI | Option Ex | 419 | 27.47 | 11,510 |
| 2007-08-01 | NATI | Option Ex | 515 | 23.68 | 12,195 |
| 2007-11-29 | NATI | Sale | 8,000 | 33.16 | 265,240 |
| 2007-08-30 | NATI | Sale | 10,007 | 30.93 | 309,476 |
| 2007-05-01 | NATI | Option Ex | 3,337 | 15.79 | 52,681 |
| 2007-02-09 | NATI | Option Ex | 10,007 | 9.63 | 96,357 |
| 2007-02-02 | NATI | Sale | 7,880 | 129.84 | 1,023,154 |
| 2007-02-02 | NATI | Option Ex | 7,880 | 9.63 | 75,876 |
| 2007-02-01 | NATI | Option Ex | 490 | 24.49 | 11,999 |
| 2006-11-01 | NATI | Option Ex | 482 | 23.59 | 11,368 |
| 2006-08-01 | NATI | Option Ex | 625 | 23.59 | 14,741 |
| 2006-05-01 | NATI | Option Ex | 1,638 | .00 | 0 |
| 2006-04-03 | NATI | Option Ex | 1,039 | 20.94 | 21,760 |
| 2006-01-30 | NATI | Option Ex | 8,157 | 5.93 | 48,338 |
| 2006-01-30 | NATI | Sale | 8,157 | 35.00 | 285,495 |
| 2005-08-03 | NATI | Sale | 6,555 | 29.00 | 190,095 |
| 2005-05-20 | NATI | 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 at the time of this reporting) see the Securities and Exchange Commission (SEC) website.