Insider Trading activities of National Instruments Corp insiders.

Monthly summaries of insider trading activities (stock purchases, sales, and option exercises) reported by insiders of National Instruments Corp since 2005 are illustrated in Table 1 and Table 2. Table 1 shows the monthly insider trading data of National Instruments Corp since year 2005. Table 2 shows the detailed insider transactions of National Instruments Corp since 2005. The reporting company's ticker symbol is NATI. The reporting company's CIK number is 935494.
The total value of stock buying since 2005 is $11,487,521.
The total value of stock sales since 2005 is $307,332,664.
The total value of stock option exercises since 2005 is $28,981,214.


Table 1. Monthly summaries of insider stock purchases, sales, and option exercises for National Instruments Corp (NATI).
Trading Period Insider Buying Insider Sales Option Exercises
year-month Shares Value Shares Value Shares Value
2018-02 1,900 $88,464 450,466 $22,489,668 642 $24,556
2018-01 0 $0 45,500 $2,038,823 0 $0
2017-12 0 $0 37,600 $1,590,095 50,000 $0
2017-11 0 $0 1,023,651 $44,730,882 359 $12,553
2017-10 0 $0 47,500 $2,080,700 0 $0
2017-09 0 $0 38,000 $1,535,605 0 $0
2017-08 0 $0 38,000 $1,511,345 457 $13,559
2017-07 0 $0 47,500 $1,962,345 0 $0
2017-06 0 $0 38,000 $1,489,020 0 $0
2017-05 0 $0 126,854 $4,563,522 68,897 $502,602
2017-04 0 $0 32,000 $1,102,035 0 $0
2017-03 0 $0 7,500 $241,650 0 $0
2017-02 0 $0 10,000 $320,624 1,620 $38,679
2017-01 0 $0 10,000 $309,050 0 $0
2016-11 1,207 $32,861 10,261 $291,307 32 $764
2016-10 0 $0 17,454 $485,133 0 $0
2016-08 0 $0 0 $0 295 $6,913
2016-05 395,394 $10,871,449 0 $0 51,228 $350,195
2016-02 3,100 $86,322 0 $0 1,250 $30,280
2015-11 0 $0 3,262 $100,078 0 $0
2015-10 0 $0 3,000 $92,655 0 $0
2015-08 0 $0 0 $0 335 $8,143
2015-05 3,000 $85,497 9,880 $294,066 49,494 $351,424
2015-02 0 $0 0 $0 1,165 $29,785
2014-12 0 $0 8,000 $254,799 0 $0
2014-11 0 $0 20,841 $675,075 188 $5,062
2014-10 0 $0 16,000 $464,900 0 $0
2014-09 0 $0 20,000 $643,140 0 $0
2014-08 2,000 $63,250 26,173 $855,888 659 $15,297
2014-07 0 $0 16,000 $513,419 0 $0
2014-06 0 $0 20,000 $608,904 0 $0
2014-05 3,500 $96,491 15,918 $441,884 60,193 $300,816
2014-04 0 $0 16,000 $435,540 0 $0
2014-03 0 $0 20,000 $582,588 0 $0
2014-02 0 $0 16,000 $454,356 904 $22,283
2014-01 0 $0 16,000 $505,592 0 $0
2013-12 0 $0 28,000 $867,400 0 $0
2013-11 0 $0 80,271 $2,556,988 27,273 $550,440
2013-10 0 $0 48,000 $1,461,048 0 $0
2013-09 0 $0 60,000 $1,777,368 0 $0
2013-08 0 $0 48,000 $1,348,020 286 $6,644
2013-07 0 $0 84,000 $2,419,620 15,000 $305,100
2013-06 0 $0 48,000 $1,322,400 0 $0
2013-05 1,000 $28,470 79,839 $2,261,775 93,444 $848,746
2013-04 0 $0 63,000 $1,860,174 0 $0
2013-03 0 $0 48,000 $1,492,308 9,733 $193,686
2013-02 0 $0 93,250 $2,589,898 72,364 $1,404,156
2013-01 0 $0 48,000 $1,306,656 0 $0
2012-12 0 $0 48,000 $1,210,860 0 $0
2012-11 0 $0 39,000 $949,334 18,001 $241,453
2012-10 2,000 $47,140 40,000 $961,288 0 $0
2012-09 0 $0 32,000 $830,520 0 $0
2012-08 0 $0 32,000 $840,160 11 $241
2012-07 0 $0 40,000 $1,059,744 0 $0
2012-06 0 $0 32,000 $823,018 0 $0
2012-05 0 $0 39,385 $1,038,890 69,017 $385,449
2012-04 0 $0 40,000 $1,077,720 0 $0
2012-03 0 $0 32,000 $868,624 22,500 $372,690
2012-02 0 $0 44,500 $1,201,679 955 $21,680
2012-01 0 $0 32,000 $838,528 0 $0
2011-12 0 $0 32,000 $824,304 0 $0
2011-11 0 $0 19,500 $500,545 12,860 $172,491
2011-08 0 $0 13,143 $313,323 1,320 $28,991
2011-07 0 $0 55,750 $1,719,030 0 $0
2011-06 0 $0 14,000 $419,400 0 $0
2011-05 0 $0 14,563 $420,137 113,265 $494,441
2011-04 0 $0 47,500 $1,509,598 0 $0
2011-03 0 $0 37,000 $1,159,109 0 $0
2011-02 0 $0 98,980 $4,366,430 19,310 $423,768
2011-01 0 $0 112,938 $4,686,630 64,559 $1,458,618
2010-12 0 $0 83,754 $3,085,814 0 $0
2010-11 0 $0 173,216 $6,016,121 34,529 $731,494
2010-10 0 $0 106,000 $3,506,014 0 $0
2010-09 0 $0 129,500 $4,088,855 0 $0
2010-08 0 $0 98,654 $3,037,658 9,889 $243,346
2010-07 0 $0 147,000 $4,651,750 1,505 $31,668
2010-06 0 $0 111,000 $3,578,266 0 $0
2010-05 0 $0 86,904 $2,895,742 64,288 $234,088
2010-04 0 $0 149,139 $5,274,585 22,479 $626,000
2010-03 0 $0 185,954 $6,135,802 273,368 $8,434,635
2010-02 0 $0 111,932 $3,417,548 7,352 $157,671
2010-01 0 $0 303,656 $9,065,642 0 $0
2009-12 0 $0 56,000 $1,637,732 0 $0
2009-11 0 $0 43,618 $1,233,402 3,516 $74,283
2009-10 0 $0 24,000 $664,041 0 $0
2009-09 0 $0 32,598 $902,367 0 $0
2009-08 0 $0 23,037 $583,538 1,607 $30,104
2009-07 0 $0 6,000 $151,500 0 $0
2009-06 0 $0 1,000 $22,840 0 $0
2009-05 0 $0 31,665 $670,503 60,689 $113,284
2009-04 0 $0 9,000 $194,940 9,000 $136,872
2009-03 0 $0 0 $0 11,096 $135,614
2009-02 0 $0 21,982 $426,988 20,216 $255,214
2009-01 0 $0 13,283 $308,065 13,283 $279,486
2008-12 0 $0 25,962 $627,025 0 $0
2008-11 0 $0 10,378 $244,558 8,902 $180,168
2008-10 0 $0 13,200 $336,600 0 $0
2008-09 0 $0 94,800 $3,023,420 0 $0
2008-08 0 $0 138,122 $4,651,377 37,590 $517,280
2008-07 0 $0 81,100 $2,506,816 0 $0
2008-06 1,000 $31,544 74,000 $2,274,227 0 $0
2008-05 0 $0 250,693 $7,695,050 71,711 $561,211
2008-04 0 $0 22,000 $613,136 0 $0
2008-03 0 $0 15,400 $391,534 77,625 $1,188,048
2008-02 0 $0 13,300 $354,170 28,523 $439,567
2008-01 0 $0 24,400 $720,549 0 $0
2007-12 0 $0 66,000 $2,227,022 0 $0
2007-11 0 $0 94,067 $3,062,025 39,989 $622,215
2007-10 0 $0 104,400 $3,619,673 5,996 $104,356
2007-09 0 $0 109,200 $3,590,235 0 $0
2007-08 0 $0 74,768 $2,385,916 13,666 $229,093
2007-07 0 $0 103,700 $3,478,642 0 $0
2007-06 0 $0 74,200 $2,401,600 3,000 $61,739
2007-05 0 $0 378,397 $11,368,531 82,611 $933,194
2007-04 0 $0 4,400 $123,945 0 $0
2007-02 1,000 $26,824 98,351 $3,509,818 97,571 $1,065,161
2007-01 0 $0 8,600 $241,708 0 $0
2006-12 0 $0 4,400 $126,332 0 $0
2006-11 214 $5,046 71,140 $2,150,542 22,646 $236,074
2006-10 0 $0 387,899 $11,600,319 57,599 $514,414
2006-09 0 $0 17,600 $486,028 0 $0
2006-08 0 $0 74,048 $2,040,017 52,259 $546,785
2006-07 0 $0 24,200 $646,936 318 $6,691
2006-06 0 $0 4,400 $120,031 0 $0
2006-05 0 $0 73,433 $2,163,528 22,138 $0
2006-04 0 $0 84,300 $2,784,516 4,987 $104,443
2006-03 0 $0 118,500 $3,857,218 0 $0
2006-02 0 $0 149,164 $4,793,574 74,369 $1,099,748
2006-01 0 $0 161,490 $5,404,193 44,980 $465,763
2005-12 0 $0 92,100 $2,796,700 0 $0
2005-11 1,000 $24,163 5,987 $151,070 0 $0
2005-09 0 $0 13,200 $372,985 0 $0
2005-08 0 $0 100,555 $2,835,075 0 $0
2005-07 0 $0 6,600 $184,800 0 $0
2005-05 0 $0 915 $21,099 0 $0
2005-03 0 $0 15,840 $455,810 0 $0
2004-10 0 $0 18,400 $561,347 0 $0
2003-08 0 $0 4,400 $166,210 0 $0
2002-12 0 $0 2,200 $69,830 0 $0

Table 2. Detailed insider stock purchases, sales, and option exercises of National Instruments Corp insiders (NATI)
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
2018-02-21 Truchard James J Sale 300,000 50.50 15,150,000
2018-02-20 Truchard James J Sale 42,500 49.50 2,103,750
2018-02-20 Kodosky Jeffrey L Sale 1,600 49.51 79,216
2018-02-16 Rust Scott Arthur (Senior Vice President) Sale 4,395 49.44 217,297
2018-02-12 Truchard James J Sale 42,500 46.47 1,974,975
2018-02-12 Kodosky Jeffrey L Sale 1,600 46.51 74,416
2018-02-08 Le Duy Loan T Buy 1,900 46.56 88,464
2018-02-05 Truchard James J Sale 42,500 49.85 2,118,625
2018-02-05 Kodosky Jeffrey L Sale 1,600 49.15 78,640
2018-02-02 Davern Alexander M (President & CEO) Sale 11,925 50.31 599,946
2018-02-01 Roiko John Charles (Chief Accounting Officer) Sale 1,846 50.27 92,803
2018-02-01 Rust Scott Arthur (Senior Vice President) Option Ex 185 38.25 7,076
2018-02-01 Davern Alexander M (President & CEO) Option Ex 457 38.25 17,480
2018-01-29 Truchard James J Sale 7,500 47.30 354,750
2018-01-29 Kodosky Jeffrey L Sale 1,600 47.27 75,632
2018-01-22 Truchard James J Sale 7,500 46.20 346,500
2018-01-22 Kodosky Jeffrey L Sale 1,600 46.19 73,904
2018-01-16 Truchard James J Sale 7,500 44.74 335,550
2018-01-16 Kodosky Jeffrey L Sale 1,600 44.77 71,632
2018-01-08 Truchard James J Sale 7,500 43.79 328,425
2018-01-08 Kodosky Jeffrey L Sale 1,600 43.77 70,032
2018-01-02 Truchard James J Sale 7,500 42.02 315,150
2018-01-02 Kodosky Jeffrey L Sale 1,600 42.03 67,248
2017-12-26 Truchard James J Sale 7,500 41.88 314,100
2017-12-26 Kodosky Jeffrey L Sale 1,600 41.95 67,120
2017-12-18 Truchard James J Sale 7,500 42.06 315,450
2017-12-18 Kodosky Jeffrey L Sale 2,000 42.12 84,240
2017-12-15 Davern Alexander M (President & CEO) Option Ex 50,000 .00 0
2017-12-12 Truchard James J Sale 2,000 42.10 84,200
2017-12-11 Truchard James J Sale 5,500 42.75 235,125
2017-12-11 Kodosky Jeffrey L Sale 2,000 42.79 85,580
2017-12-04 Truchard James J Sale 7,500 42.52 318,900
2017-12-04 Kodosky Jeffrey L Sale 2,000 42.69 85,380
2017-11-27 Truchard James J Sale 7,500 44.33 332,475
2017-11-27 Kodosky Jeffrey L Sale 2,000 44.30 88,600
2017-11-20 Truchard James J Sale 7,500 44.44 333,300
2017-11-20 Kodosky Jeffrey L Sale 2,000 44.48 88,960
2017-11-15 Roiko John Charles (Chief Accounting Officer) Sale 489 44.45 21,735
2017-11-13 Truchard James J Sale 7,500 44.58 334,350
2017-11-13 Kodosky Jeffrey L Sale 2,000 44.58 89,160
2017-11-06 Truchard James J Sale 7,500 45.30 339,750
2017-11-06 Kodosky Jeffrey L Sale 2,000 45.19 90,380
2017-11-01 Rapp Karen Marie (CFO, Treasurer & EVP) Option Ex 268 34.97 9,371
2017-11-01 Roiko John Charles (Chief Accounting Officer) Option Ex 91 34.97 3,182
2017-11-01 Truchard James J Sale 985,162 43.66 43,012,172
2017-10-30 Truchard James J Sale 7,500 44.61 334,575
2017-10-30 Kodosky Jeffrey L Sale 2,000 44.60 89,200
2017-10-23 Truchard James J Sale 7,500 43.98 329,850
2017-10-23 Kodosky Jeffrey L Sale 2,000 43.99 87,980
2017-10-16 Truchard James J Sale 7,500 44.43 333,225
2017-10-16 Kodosky Jeffrey L Sale 2,000 44.52 89,040
2017-10-09 Truchard James J Sale 7,500 43.64 327,300
2017-10-09 Kodosky Jeffrey L Sale 2,000 43.63 87,260
2017-10-02 Truchard James J Sale 7,500 42.34 317,550
2017-10-02 Kodosky Jeffrey L Sale 2,000 42.36 84,720
2017-09-25 Truchard James J Sale 7,500 41.07 308,025
2017-09-25 Kodosky Jeffrey L Sale 2,000 41.08 82,160
2017-09-18 Truchard James J Sale 7,500 40.88 306,600
2017-09-18 Kodosky Jeffrey L Sale 2,000 40.88 81,760
2017-09-11 Truchard James J Sale 7,500 40.08 300,600
2017-09-11 Kodosky Jeffrey L Sale 2,000 40.08 80,160
2017-09-05 Truchard James J Sale 7,500 39.60 297,000
2017-09-05 Kodosky Jeffrey L Sale 2,000 39.65 79,300
2017-08-28 Truchard James J Sale 7,500 39.60 297,000
2017-08-28 Kodosky Jeffrey L Sale 2,000 39.54 79,080
2017-08-21 Truchard James J Sale 7,500 38.86 291,450
2017-08-21 Kodosky Jeffrey L Sale 2,000 38.85 77,700
2017-08-14 Truchard James J Sale 7,500 40.08 300,600
2017-08-14 Kodosky Jeffrey L Sale 2,000 40.08 80,160
2017-08-07 Truchard James J Sale 7,500 40.57 304,275
2017-08-07 Kodosky Jeffrey L Sale 2,000 40.54 81,080
2017-08-01 Roiko John Charles (Chief Accounting Officer) Option Ex 203 29.67 6,023
2017-08-01 Rust Scott Arthur (Senior Vice President) Option Ex 238 29.67 7,062
2017-08-01 Starkloff Eric Howard (Executive Vice President) Option Ex 16 29.67 474
2017-07-31 Truchard James J Sale 7,500 41.15 308,625
2017-07-31 Kodosky Jeffrey L Sale 2,000 41.13 82,260
2017-07-24 Truchard James J Sale 7,500 42.96 322,200
2017-07-24 Kodosky Jeffrey L Sale 2,000 42.94 85,880
2017-07-17 Truchard James J Sale 7,500 42.05 315,375
2017-07-17 Kodosky Jeffrey L Sale 2,000 42.03 84,060
2017-07-10 Truchard James J Sale 7,500 40.21 301,575
2017-07-10 Kodosky Jeffrey L Sale 2,000 40.25 80,500
2017-07-05 Truchard James J Sale 7,500 40.18 301,350
2017-07-03 Kodosky Jeffrey L Sale 2,000 40.26 80,520
2017-06-26 Truchard James J Sale 7,500 39.89 299,175
2017-06-26 Kodosky Jeffrey L Sale 2,000 39.89 79,780
2017-06-19 Truchard James J Sale 7,500 39.58 296,850
2017-06-19 Kodosky Jeffrey L Sale 2,000 39.54 79,080
2017-06-12 Truchard James J Sale 7,500 38.48 288,600
2017-06-12 Kodosky Jeffrey L Sale 2,000 38.51 77,012
2017-06-05 Truchard James J Sale 7,500 38.79 290,925
2017-06-05 Kodosky Jeffrey L Sale 2,000 38.80 77,598
2017-05-30 Roiko John Charles (Vice President, Finance) Sale 1,047 38.42 40,229
2017-05-30 Rust Scott Arthur (Senior Vice President) Sale 3,288 38.34 126,061
2017-05-30 Truchard James J Sale 7,500 38.36 287,700
2017-05-30 Kodosky Jeffrey L Sale 2,000 38.38 76,760
2017-05-26 Davern Alexander M (President & CEO) Sale 9,914 38.52 381,887
2017-05-22 Truchard James J Sale 7,500 37.61 282,075
2017-05-22 Kodosky Jeffrey L Sale 2,000 37.47 74,940
2017-05-15 Truchard James J Sale 7,500 36.77 275,775
2017-05-15 Kodosky Jeffrey L Sale 2,000 36.64 73,280
2017-05-10 Truchard James J Sale 40,000 35.07 1,402,800
2017-05-08 Truchard James J Sale 32,500 35.01 1,137,825
2017-05-08 Kodosky Jeffrey L Sale 2,000 35.02 70,040
2017-05-05 Starkloff Eric Howard (Executive Vice President) Sale 6,888 34.91 240,480
2017-05-05 Kodosky Jeffrey L Sale 217 35.00 7,595
2017-05-01 Roiko John Charles (Interim CFO) Option Ex 3,397 13.35 45,363
2017-05-01 Fettweis Gerhard Paul Option Ex 3,084 .00 0
2017-05-01 Rust Scott Arthur (Senior Vice President) Option Ex 6,533 13.35 87,241
2017-05-01 Starkloff Eric Howard (Executive Vice President) Option Ex 10,063 13.35 134,381
2017-05-01 Mcgrath Michael E Option Ex 5,990 .00 0
2017-05-01 Berra John M Option Ex 4,439 .00 0
2017-05-01 Davern Alexander M (President & CEO) Option Ex 17,644 13.35 235,617
2017-05-01 Le Duy Loan T Option Ex 4,439 .00 0
2017-05-01 Roesslein Charles J Option Ex 4,439 .00 0
2017-05-01 Carlton Donald M Option Ex 8,869 .00 0
2017-05-01 Truchard James J Sale 2,500 34.43 86,075
2017-04-28 Truchard James J Sale 20,000 35.27 705,400
2017-04-28 Kodosky Jeffrey L Sale 2,000 35.13 70,260
2017-04-24 Truchard James J Sale 2,500 34.02 85,050
2017-04-17 Truchard James J Sale 2,500 32.12 80,300
2017-04-10 Truchard James J Sale 2,500 32.24 80,600
2017-04-03 Truchard James J Sale 2,500 32.17 80,425
2017-03-27 Truchard James J Sale 2,500 31.88 79,700
2017-03-20 Truchard James J Sale 2,500 32.45 81,125
2017-03-13 Truchard James J Sale 2,500 32.33 80,825
2017-02-27 Truchard James J Sale 2,500 32.41 81,024
2017-02-21 Truchard James J Sale 2,500 32.25 80,625
2017-02-13 Truchard James J Sale 2,500 31.92 79,800
2017-02-06 Truchard James J Sale 2,500 31.67 79,175
2017-02-01 Roiko John Charles (Interim CFO) Option Ex 252 23.88 6,017
2017-02-01 Rust Scott Arthur (Senior Vice President) Option Ex 297 23.88 7,091
2017-02-01 Starkloff Eric Howard (Executive Vice President) Option Ex 443 23.88 10,577
2017-02-01 Davern Alexander M (President & CEO) Option Ex 628 23.88 14,994
2017-01-30 Truchard James J Sale 2,500 31.11 77,775
2017-01-23 Truchard James J Sale 2,500 30.86 77,150
2017-01-17 Truchard James J Sale 2,500 30.37 75,925
2017-01-09 Truchard James J Sale 2,500 31.28 78,200
2016-11-11 Starkloff Eric Howard (Executive Vice President) Sale 1,222 29.00 35,438
2016-11-08 Starkloff Eric Howard (Executive Vice President) Sale 1,393 28.50 39,700
2016-11-07 Starkloff Eric Howard (Executive Vice President) Sale 437 28.50 12,454
2016-11-07 Davern Alexander M (COO, CFO & EXECUTIVE VP) Sale 5,500 28.31 155,710
2016-11-04 Le Duy Loan T Buy 1,207 27.23 32,861
2016-11-01 Rust Scott Arthur (Senior Vice President) Option Ex 32 23.88 764
2016-11-01 Starkloff Eric Howard (Executive Vice President) Sale 1,709 28.09 48,005
2016-10-31 Rust Scott Arthur (Senior Vice President) Sale 17,454 27.80 485,133
2016-08-01 Rust Scott Arthur (Senior Vice President) Option Ex 281 23.43 6,585
2016-08-01 Starkloff Eric Howard (Executive Vice President) Option Ex 14 23.43 328
2016-05-23 Truchard James J (President) Buy 394,819 27.50 10,855,548
2016-05-04 Le Duy Loan T Buy 575 27.66 15,901

Insider trading activities including stock purchases, stock sales, and option exercises of NATI listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of National Instruments Corp (symbol NATI, CIK number 935494) see the Securities and Exchange Commission (SEC) website.