Insider Trading activities of Seagate Technology Plc insiders.

Monthly summaries of insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Seagate Technology Plc since 2005 are illustrated in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Seagate Technology Plc since year 2005. Table 2 shows the detailed insider transactions of Seagate Technology Plc since 2005. The reporting company's ticker symbol is STX. The reporting company's CIK number is 1137789.
The total value of stock buying since 2005 is $16,864,445.
The total value of stock sales since 2005 is $13,550,622,693.
The total value of stock option exercises since 2005 is $172,422,337.


Table 1. Monthly summaries of insider stock purchases, sales, and option exercises for Seagate Technology Plc (STX).
Trading Period Insider Buying Insider Sales Option Exercises
year-month Shares Value Shares Value Shares Value
2017-11 0 $0 25,857 $998,602 0 $0
2017-10 5,000 $186,900 61,568 $2,327,791 45,863 $1,457,783
2017-09 0 $0 0 $0 34,375 $380,359
2017-08 1,000 $33,336 6,000 $200,046 0 $0
2017-06 0 $0 10,540 $440,285 0 $0
2017-05 0 $0 20,916 $903,152 0 $0
2017-04 0 $0 100,000 $5,000,000 0 $0
2017-02 0 $0 67,829 $3,214,927 60,014 $866,360
2016-11 0 $0 14,091 $547,380 0 $0
2016-09 0 $0 4,489 $161,819 0 $0
2016-08 0 $0 22,883 $741,571 20,148 $266,042
2016-06 0 $0 8,038 $191,207 0 $0
2016-05 200,000 $4,016,400 12,919 $245,138 0 $0
2016-02 205,000 $6,024,500 28,200 $897,606 55,000 $198,550
2015-11 0 $0 3,178 $123,735 4,359 $89,416
2015-09 0 $0 6,993 $337,636 0 $0
2015-08 0 $0 191,132 $9,529,256 115,334 $1,122,545
2015-06 0 $0 10,000 $541,450 0 $0
2015-05 0 $0 30,000 $1,709,850 0 $0
2015-04 0 $0 104,394 $5,932,981 62,368 $929,180
2015-03 0 $0 40,556 $2,311,528 0 $0
2015-02 0 $0 177,003 $10,738,494 9,250 $102,351
2015-01 0 $0 70,040 $4,545,795 40,040 $177,689
2014-12 0 $0 68,581 $4,519,602 38,581 $342,907
2014-11 0 $0 226,594 $14,637,817 63,230 $1,098,133
2014-10 0 $0 618,027 $38,441,582 21,836 $389,262
2014-09 0 $0 118,572 $7,071,857 4,828 $111,348
2014-08 0 $0 145,897 $8,657,971 71,667 $1,409,285
2014-07 0 $0 187,369 $11,075,560 37,369 $808,674
2014-05 0 $0 103,559 $5,225,702 121,483 $2,261,576
2014-04 0 $0 100,000 $5,700,000 0 $0
2014-03 0 $0 1,034 $51,844 0 $0
2014-02 0 $0 121,465 $6,031,818 22,003 $269,932
2014-01 0 $0 2,270 $121,524 0 $0
2013-11 1,742 $84,549 966,770 $47,298,816 810,536 $9,418,960
2013-10 0 $0 33,058,500 $1,523,063,794 8,500 $61,241
2013-09 0 $0 43,900 $1,772,035 11,500 $82,856
2013-08 0 $0 23,010 $941,395 11,500 $82,856
2013-07 0 $0 366,573 $15,253,050 216,573 $2,542,520
2013-06 0 $0 11,500 $501,342 11,500 $82,856
2013-05 0 $0 252,383 $10,497,363 205,830 $2,253,576
2013-04 0 $0 11,500 $417,737 11,500 $82,856
2013-03 0 $0 11,860 $403,379 11,500 $82,856
2013-02 0 $0 200,231 $6,894,448 199,872 $2,857,255
2013-01 0 $0 259,499 $9,522,727 259,499 $2,504,153
2012-12 0 $0 275,000 $8,090,500 25,000 $567,375
2012-11 0 $0 737,799 $20,963,215 296,824 $2,058,533
2012-10 0 $0 566,246 $17,212,426 20,000 $66,900
2012-09 0 $0 77,374 $2,371,916 49,802 $437,774
2012-08 0 $0 1,889,124 $60,888,067 2,371,790 $32,180,375
2012-07 0 $0 560,000 $13,714,559 60,000 $512,220
2012-06 0 $0 45,000 $1,035,885 45,000 $164,525
2012-05 0 $0 991,395 $31,110,829 660,479 $9,132,003
2012-04 0 $0 1,073,050 $30,343,678 549,000 $7,790,449
2012-03 0 $0 290,000 $8,058,550 290,000 $5,368,050
2012-02 0 $0 1,146,267 $28,680,781 631,636 $5,561,707
2012-01 0 $0 1,916,666 $38,411,138 416,666 $1,897,369
2011-11 0 $0 1,353,317 $23,940,589 1,803,837 $7,577,626
2011-10 0 $0 50,000 $740,599 50,000 $631,000
2011-09 0 $0 2,018 $23,640 0 $0
2011-08 0 $0 441,914 $5,281,281 650,000 $3,250,000
2011-07 0 $0 120,000 $2,041,000 120,000 $485,400
2011-04 0 $0 791,105 $13,939,151 786,355 $5,767,115
2011-02 0 $0 15,000 $7,303,050 15,000 $50,175
2011-01 0 $0 12,955 $173,256 0 $0
2010-09 0 $0 245 $2,688 0 $0
2010-04 0 $0 12,500 $257,750 0 $0
2010-01 0 $0 14,813 $283,760 14,813 $168,071
2009-12 0 $0 18,700 $336,600 18,700 $231,225
2009-11 0 $0 244,150 $3,776,574 31,650 $375,084
2009-10 0 $0 29,071 $473,358 0 $0
2009-09 0 $0 50,290 $777,454 50,000 $506,750
2009-08 100,000 $1,238,100 442 $5,419 0 $0
2009-05 150,000 $1,236,000 0 $0 0 $0
2009-02 500,000 $2,225,500 331 $1,271 0 $0
2009-01 500,000 $1,779,000 0 $0 0 $0
2008-10 0 $0 11,800 $81,774 0 $0
2008-08 0 $0 439 $6,549 0 $0
2008-07 0 $0 0 $0 169,565 $389,999
2008-05 0 $0 6,141 $128,961 0 $0
2008-01 0 $0 41,666 $1,049,149 0 $0
2007-12 0 $0 362,243 $9,813,245 50,000 $443,550
2007-11 0 $0 1,384,307 $37,492,317 967,391 $12,562,685
2007-10 0 $0 1,928,862 $52,489,738 533,185 $4,835,879
2007-09 0 $0 9,200,806 $235,858,131 97,200 $925,196
2007-08 0 $0 1,708,978 $43,597,402 87,800 $837,729
2007-07 1,600 $40,160 1,465,054 $36,381,291 531,240 $5,360,833
2007-05 0 $0 329,766 $7,034,174 340,000 $2,130,500
2007-04 0 $0 100,000 $2,117,100 100,000 $930,500
2007-03 0 $0 100,563 $2,530,741 0 $0
2007-02 0 $0 6,109,778 $165,273,923 584,218 $4,114,681
2007-01 0 $0 1,337,794 $36,681,963 574,880 $4,723,024
2006-12 0 $0 350,073 $9,415,624 270,000 $2,317,050
2006-11 0 $0 13,576,735 $310,229,169 699,821 $5,303,160
2006-10 0 $0 495,541 $11,170,901 150,000 $1,395,750
2006-08 0 $0 10,206,101 $217,650,456 55,000 $532,525
2006-07 0 $0 173,382 $4,334,550 120,000 $986,400
2006-06 0 $0 56,583 $1,359,840 0 $0
2006-05 0 $0 22,968,303 $530,261,766 320,000 $1,554,899
2006-04 0 $0 60,000 $1,606,600 60,000 $493,200
2006-03 0 $0 106,510 $2,916,950 40,000 $413,075
2006-02 0 $0 635,790 $16,761,741 214,103 $1,052,835
2006-01 0 $0 32,817,233 $840,239,042 855,088 $4,005,764
2005-11 0 $0 100,000 $1,880,000 0 $0
2005-08 0 $0 311,500,000 $5,834,395,000 0 $0
2005-05 0 $0 44,500,000 $833,485,000 0 $0
2005-04 0 $0 120,000,000 $2,214,000,000 0 $0
2005-03 0 $0 20,000 $399,000 0 $0

Table 2. Detailed insider stock purchases, sales, and option exercises of Seagate Technology Plc insiders (STX)
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
2017-11-29 Zander Edward J Sale 15,089 38.78 585,226
2017-11-22 Geldmacher Jay L Sale 5,365 40.00 214,600
2017-11-06 Brace Philip G (Former President, CSSG) Sale 5,403 36.79 198,776
2017-10-27 Nygaard Jeffrey D. (Executive Vice President) Buy 5,000 37.38 186,900
2017-10-27 Brace Philip G (Former President, CSSG) Sale 44,944 37.19 1,671,467
2017-10-27 Brace Philip G (Former President, CSSG) Option Ex 40,393 36.09 1,457,783
2017-10-25 Moyo Dambisa F Sale 3,316 38.21 126,704
2017-10-24 Moyo Dambisa F Sale 5,399 39.50 213,260
2017-10-23 Morton David H Jr (EVP & CFO) Sale 7,909 40.00 316,360
2017-10-17 Adams Mark Option Ex 5,470 .00 0
2017-09-08 Luczo Stephen J (Chairman & CEO) Option Ex 34,375 11.06 380,359
2017-08-01 Brace Philip G (President, CSSG) Buy 1,000 33.34 33,336
2017-08-01 Brace Philip G (President, CSSG) Sale 6,000 33.34 200,046
2017-06-12 Massaroni Kenneth M (SVP, Interim CLO) Sale 7,500 41.17 308,775
2017-06-09 Morton David H Jr (EVP & CFO) Sale 3,040 43.26 131,510
2017-05-16 Park Chong Sup Sale 3,809 43.63 166,186
2017-05-15 Re Mark (SVP & CTO) Sale 9,607 43.47 417,616
2017-05-12 Massaroni Kenneth M (SVP, Interim CLO) Sale 7,500 42.58 319,350
2017-04-25 Luczo Stephen J (Chairman & CEO) Sale 100,000 50.00 5,000,000
2017-02-24 Mosley William D (President & COO) Sale 38,581 47.28 1,824,109
2017-02-24 Mosley William D (President & COO) Option Ex 38,581 11.06 426,705
2017-02-22 Morton David H Jr (EVP & CFO) Sale 6,197 47.34 293,365
2017-02-13 Re Mark (SVP & CTO) Sale 21,433 47.84 1,025,247
2017-02-13 Re Mark (SVP & CTO) Option Ex 21,433 20.51 439,655
2017-02-01 Park Chong Sup Sale 1,618 44.63 72,206
2016-11-18 Re Mark (SVP & CTO) Sale 11,000 38.97 428,680
2016-11-16 Macpherson Regan J (SVP and General Counsel) Sale 3,091 38.40 118,700
2016-09-14 Morton David H Jr (EVP & CFO) Sale 1,716 36.16 62,053
2016-09-13 Morton David H Jr (EVP & CFO) Sale 2,773 35.98 99,766
2016-08-31 Re Mark (SVP & CTO) Sale 5,800 33.58 194,787
2016-08-29 Zander Edward J Option Ex 10,000 14.82 148,250
2016-08-24 Re Mark (SVP & CTO) Sale 12,750 31.84 406,011
2016-08-24 Re Mark (SVP & CTO) Option Ex 8,897 11.15 99,246
2016-08-09 Re Mark (SVP & CTO) Sale 3,082 32.50 100,174
2016-08-09 Biondi Frank Sale 1,251 32.45 40,599
2016-08-09 Biondi Frank Option Ex 1,251 14.82 18,546
2016-06-06 Morton David H Jr (Chief Financial Officer & EVP) Sale 8,038 23.79 191,207
2016-05-06 Biondi Frank Sale 12,919 18.98 245,138
2016-05-03 Luczo Stephen J (Chairman and CEO) Buy 200,000 20.08 4,016,400
2016-02-18 Zander Edward J Sale 28,200 31.83 897,606
2016-02-18 Zander Edward J Option Ex 55,000 3.61 198,550
2016-02-02 Brace Philip G (President, CSES) Buy 5,000 29.10 145,500
2016-02-02 Luczo Stephen J (Chairman and CEO) Buy 200,000 29.39 5,879,000
2015-11-04 Morton David H Jr (Chief Financial Officer & EVP) Sale 3,178 38.94 123,735
2015-11-04 Morton David H Jr (Chief Financial Officer & EVP) Option Ex 4,359 20.51 89,416
2015-09-14 O Malley Patrick J (EVP & Chief Financial Officer) Sale 6,993 48.28 337,636
2015-08-25 Re Mark (SVP & Chief Technical Officer) Sale 115,334 48.75 5,622,993
2015-08-25 Re Mark (SVP & Chief Technical Officer) Option Ex 115,334 9.73 1,122,545
2015-08-14 Pimentel Albert A (President, Global Mkts and CSO) Sale 5,000 51.78 258,900
2015-08-13 Pimentel Albert A (President, Global Mkts and CSO) Sale 5,000 51.56 257,780
2015-08-03 Luczo Stephen J (Chairman and CEO) Sale 65,798 51.52 3,389,583
2015-06-05 Luczo Stephen J (Chairman and CEO) Sale 10,000 54.15 541,450
2015-05-18 Luczo Stephen J (Chairman and CEO) Sale 30,000 56.99 1,709,850
2015-04-27 Morton David H Jr (SVP, FINANCE, TREASURER & PAO) Sale 6,179 58.42 361,008
2015-04-27 Morton David H Jr (SVP, FINANCE, TREASURER & PAO) Option Ex 5,983 27.06 161,911
2015-04-27 Dehaan Douglas J (General Manager, Samsung HDD) Sale 10,179 58.37 594,138
2015-04-27 Dehaan Douglas J (General Manager, Samsung HDD) Option Ex 10,179 20.51 208,801
2015-04-24 Richarz David K (Executive Vice President,Sales) Sale 7,625 58.20 443,744
2015-04-24 Richarz David K (Executive Vice President,Sales) Option Ex 7,625 35.02 266,989
2015-04-24 Luczo Stephen J (Chairman and CEO) Sale 10,000 58.45 584,490
2015-04-23 Pimentel Albert A (President, Global Mkts and CSO) Sale 11,830 58.99 697,887
2015-04-10 Mosley William D (President, Ops and Technology) Sale 58,581 55.51 3,251,714
2015-04-10 Mosley William D (President, Ops and Technology) Option Ex 38,581 7.55 291,479
2015-03-11 Lerner James J (President, Cloud Systems) Sale 19,642 54.21 1,064,753
2015-03-09 Luczo Stephen J (Chairman and CEO) Sale 10,000 57.46 574,630
2015-03-09 Re Mark (SVP & Chief Technical Officer) Sale 914 57.19 52,275
2015-03-02 Luczo Stephen J (Chairman and CEO) Sale 10,000 61.99 619,870
2015-02-23 Luczo Stephen J (Chairman and CEO) Sale 50,000 61.87 3,093,500
2015-02-12 Massaroni Kenneth M (EVP,General Counsel, CAO) Sale 9,250 61.44 568,357
2015-02-12 Massaroni Kenneth M (EVP,General Counsel, CAO) Option Ex 9,250 11.06 102,351
2015-02-04 Richarz David K (Executive Vice President,Sales) Sale 17,753 60.10 1,066,937
2015-02-04 Luczo Stephen J (Chairman and CEO) Sale 100,000 60.10 6,009,700
2015-01-29 Reyes Gregorio (Director) Sale 1,459 57.08 83,275
2015-01-29 Reyes Gregorio (Director) Option Ex 1,459 14.82 21,629
2015-01-27 Luczo Stephen J (Chairman and CEO) Sale 10,000 57.45 574,500
2015-01-02 Mosley William D (EVP, Operations and R&D) Sale 58,581 66.37 3,888,020
2015-01-02 Mosley William D (EVP, Operations and R&D) Option Ex 38,581 4.04 156,060
2014-12-22 Luczo Stephen J (Chairman and CEO) Sale 10,000 68.33 683,250
2014-12-09 Mosley William D (EVP, Operations and R&D) Sale 58,581 65.49 3,836,352
2014-12-09 Mosley William D (EVP, Operations and R&D) Option Ex 38,581 8.89 342,907
2014-11-24 Geldmacher Jay L (Director) Sale 5,000 66.00 330,000
2014-11-20 Richarz David K (Executive Vice President,Sales) Sale 15,400 65.36 1,006,467
2014-11-20 Luczo Stephen J (Chairman and CEO) Sale 92,017 65.00 5,981,105
2014-11-18 Pimentel Albert A (EVP, Sales/Marketing Officer) Sale 40,000 64.83 2,593,200
2014-11-18 Pimentel Albert A (EVP, Sales/Marketing Officer) Option Ex 40,000 14.81 592,400
2014-11-17 Pimentel Albert A (EVP, Sales/Marketing Officer) Sale 10,000 63.90 639,010
2014-11-17 Pimentel Albert A (EVP, Sales/Marketing Officer) Option Ex 10,000 14.81 148,100
2014-11-14 Richarz David K (Executive Vice President,Sales) Sale 17,592 62.44 1,098,462
2014-11-04 Richarz David K (Executive Vice President,Sales) Sale 25,372 64.35 1,632,637
2014-11-04 Luczo Stephen J (Chairman and CEO) Sale 7,983 65.00 518,895
2014-11-03 O Malley Patrick J (EVP & Chief Financial Officer) Sale 13,230 63.34 838,041
2014-11-03 O Malley Patrick J (EVP & Chief Financial Officer) Option Ex 13,230 27.03 357,633
2014-10-31 Dehaan Douglas J (General Manager, Samsung HDD) Sale 23,087 62.14 1,434,718
2014-10-31 Dehaan Douglas J (General Manager, Samsung HDD) Option Ex 14,607 17.36 253,621
2014-10-31 Massaroni Kenneth M (EVP,General Counsel, CAO) Sale 66,310 62.27 4,129,190
2014-10-31 Mosley William D (EVP, Operations and R&D) Sale 64,939 62.19 4,038,556
2014-10-31 Richarz David K (Executive Vice President,Sales) Sale 57,100 62.17 3,550,192
2014-10-31 Luczo Stephen J (Chairman and CEO) Sale 375,830 62.31 23,418,343
2014-10-31 Re Mark (SVP & Chief Technical Officer) Sale 10,600 62.20 659,309
2014-10-31 Park Chong Sup (Director) Sale 1,250 62.58 78,218
2014-10-30 Morton David H Jr (SVP, FINANCE, TREASURER & PAO) Sale 3,655 60.00 219,300
2014-10-30 Morton David H Jr (SVP, FINANCE, TREASURER & PAO) Option Ex 3,479 27.06 94,148
2014-10-30 Richarz David K (Executive Vice President,Sales) Sale 8,317 59.86 497,872
2014-10-30 Richarz David K (Executive Vice President,Sales) Option Ex 3,750 11.06 41,493
2014-10-30 Reyes Gregorio (Director) Sale 3,800 59.88 227,544
2014-10-29 Morton David H Jr (SVP, FINANCE, TREASURER & PAO) Sale 3,139 60.00 188,340
2014-09-15 Morton David H Jr (SVP, FINANCE, TREASURER & PAO) Sale 9,906 60.30 597,282
2014-09-15 Morton David H Jr (SVP, FINANCE, TREASURER & PAO) Option Ex 4,828 23.06 111,348
2014-09-15 Dehaan Douglas J (General Manager, Samsung HDD) Sale 3,037 59.47 180,610
2014-09-15 Massaroni Kenneth M (EVP,General Counsel, CAO) Sale 1,256 59.49 74,718
2014-09-15 O Malley Patrick J (EVP & Chief Financial Officer) Sale 68,240 59.10 4,032,915
2014-09-15 Re Mark (SVP & Chief Technical Officer) Sale 3,889 59.39 230,952
2014-09-11 Morton David H Jr (SVP, FINANCE, TREASURER & PAO) Sale 1,052 60.26 63,396
2014-09-11 Dehaan Douglas J (General Manager, Samsung HDD) Sale 987 60.35 59,568
2014-09-11 Massaroni Kenneth M (EVP,General Counsel, CAO) Sale 2,921 60.43 176,507
2014-09-11 Pimentel Albert A (EVP, Sales/Marketing Officer) Sale 3,172 60.52 191,975
2014-09-11 Mosley William D (EVP, Operations and R&D) Sale 3,058 60.03 183,587
2014-09-11 Richarz David K (Executive Vice President,Sales) Sale 2,118 60.63 128,414
2014-09-11 O Malley Patrick J (EVP & Chief Financial Officer) Sale 3,175 60.46 191,957
2014-09-11 Re Mark (SVP & Chief Technical Officer) Sale 1,526 60.48 92,295
2014-09-10 Morton David H Jr (SVP, FINANCE, TREASURER & PAO) Sale 506 61.23 30,982
2014-09-10 Massaroni Kenneth M (EVP,General Counsel, CAO) Sale 2,054 61.13 125,565
2014-09-10 Pimentel Albert A (EVP, Sales/Marketing Officer) Sale 2,744 60.78 166,780
2014-09-10 Mosley William D (EVP, Operations and R&D) Sale 2,811 61.19 172,016
2014-09-10 Richarz David K (Executive Vice President,Sales) Sale 1,750 60.78 106,363
2014-09-10 O Malley Patrick J (EVP & Chief Financial Officer) Sale 2,738 60.93 166,818
2014-09-10 Re Mark (SVP & Chief Technical Officer) Sale 1,632 60.76 99,157
2014-08-29 Massaroni Kenneth M (EVP,General Counsel, CAO) Sale 7,500 62.24 466,800
2014-08-29 Massaroni Kenneth M (EVP,General Counsel, CAO) Option Ex 7,500 13.73 102,975
2014-08-28 Zander Edward J Sale 10,000 62.09 620,900
2014-08-25 O Malley Patrick J (EVP & Chief Financial Officer) Sale 62,916 60.89 3,830,829
2014-08-25 O Malley Patrick J (EVP & Chief Financial Officer) Option Ex 62,916 20.47 1,287,764
2014-08-21 Park Chong Sup (Director) Sale 4,251 59.98 254,987
2014-08-21 Park Chong Sup (Director) Option Ex 1,251 14.82 18,546
2014-08-06 Luczo Stephen J (Chairman and CEO) Sale 50,000 56.60 2,830,050
2014-08-04 Luczo Stephen J (Chairman and CEO) Sale 11,230 58.27 654,405
2014-07-25 Richarz David K (Executive Vice President,Sales) Sale 25,650 59.56 1,527,611
2014-07-25 Richarz David K (Executive Vice President,Sales) Option Ex 25,650 20.47 525,004
2014-07-25 Biondi Frank (Director) Sale 10,000 59.55 595,450
2014-07-25 Biondi Frank (Director) Option Ex 10,000 26.46 264,650
2014-07-24 Morton David H Jr (SVP, FINANCE, TREASURER & PAO) Sale 1,719 59.10 101,599
2014-07-24 Morton David H Jr (SVP, FINANCE, TREASURER & PAO) Option Ex 1,719 11.06 19,020
2014-07-24 Luczo Stephen J (Chairman and CEO) Sale 150,000 59.01 8,850,900
2014-05-30 Re Mark (SVP & Chief Technical Officer) Sale 3,125 53.52 167,265
2014-05-30 Re Mark (SVP & Chief Technical Officer) Option Ex 3,125 11.06 34,578
2014-05-16 Richarz David K (Executive Vice President,Sales) Sale 5,300 50.91 269,849
2014-05-16 Richarz David K (Executive Vice President,Sales) Option Ex 5,300 11.06 58,644
2014-05-13 Luczo Stephen J (Chairman and CEO) Sale 54,345 50.28 2,732,575
2014-05-13 Luczo Stephen J (Chairman and CEO) Option Ex 84,139 20.65 1,737,302
2014-05-06 Dehaan Douglas J (General Manager, Samsung HDD) Sale 15,490 50.64 784,382

Insider trading activities including stock purchases, stock sales, and option exercises of STX listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Seagate Technology Plc (symbol STX, CIK number 1137789) see the Securities and Exchange Commission (SEC) website.