Insider Trading activities of Zendesk, Inc. (ZEN)

Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Zendesk, Inc. (ZEN) since 2005 are illustrated in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Zendesk, Inc. since year 2005. Table 2 shows the detailed insider transactions of Zendesk, Inc. since 2005. The reporting company's ticker symbol is ZEN. The reporting company's CIK number is 1463172.
The total value of stock buying since 2005 is $12,764,495.
The total value of stock sales since 2005 is $181,828,280.
The total value of stock option exercises since 2005 is $14,593,850.


Table 1. Monthly summaries of insider stock purchases, sales, and option exercises for Zendesk, Inc. (ZEN).
Trading Period Insider Buying Insider Sales Option Exercises
year-month Shares Value Shares Value Shares Value
2019-05 0 $0 67,085 $5,759,963 57,310 $115,010
2019-04 0 $0 9,256 $756,966 22,717 $66,383
2019-03 0 $0 9,256 $769,942 22,617 $82,400
2019-02 0 $0 95,442 $7,451,294 42,812 $267,320
2019-01 0 $0 31,299 $1,980,285 52,378 $66,640
2018-12 0 $0 9,625 $578,583 23,621 $66,640
2018-11 0 $0 83,679 $4,571,649 23,627 $66,640
2018-10 0 $0 8,073 $502,264 22,623 $33,108
2018-09 0 $0 20,764 $1,452,447 26,622 $179,280
2018-08 0 $0 87,058 $5,422,606 29,294 $136,914
2018-07 0 $0 2,073 $125,063 16,620 $0
2018-06 0 $0 11,639 $673,987 26,125 $56,553
2018-05 0 $0 110,732 $6,128,746 78,176 $58,600
2018-04 0 $0 9,425 $466,472 22,521 $98,000
2018-03 0 $0 6,925 $338,627 20,025 $117,200
2018-02 0 $0 211,925 $8,586,871 155,017 $890,000
2018-01 0 $0 16,593 $606,949 26,857 $126,399
2017-12 0 $0 7,553 $257,784 16,862 $31,200
2017-11 0 $0 140,283 $4,858,271 96,855 $1,300,070
2017-10 0 $0 2,967 $89,309 11,861 $0
2017-09 0 $0 12,966 $378,938 26,262 $62,400
2017-08 0 $0 69,890 $1,976,410 19,643 $31,015
2017-07 0 $0 8,459 $247,477 24,645 $62,206
2017-06 0 $0 38,736 $1,085,432 61,236 $382,844
2017-05 0 $0 101,666 $2,730,250 179,715 $114,016
2017-04 0 $0 1,766 $49,801 4,634 $0
2017-03 0 $0 23,459 $642,737 19,341 $31,015
2017-02 0 $0 58,439 $1,468,620 13,020 $62,206
2017-01 0 $0 3,283 $77,547 8,372 $31,015
2016-12 0 $0 3,046 $65,501 8,372 $31,006
2016-11 0 $0 68,835 $1,644,750 14,984 $46,219
2016-10 0 $0 11,693 $342,600 18,373 $73,714
2016-09 0 $0 141,693 $4,315,494 118,371 $731,705
2016-08 0 $0 198,726 $6,048,313 61,740 $436,664
2016-07 0 $0 147,212 $4,221,317 150,954 $1,146,812
2016-06 0 $0 156,088 $4,146,077 154,847 $1,177,508
2016-05 0 $0 94,354 $2,340,934 96,098 $539,498
2016-04 0 $0 10,209 $222,996 14,152 $32,681
2016-03 0 $0 38,636 $773,063 38,654 $157,648
2016-02 0 $0 5,000 $82,135 5,468 $11,500
2016-01 0 $0 9,184 $213,964 14,023 $65,309
2015-12 0 $0 228,500 $5,862,364 191,716 $1,063,284
2015-11 0 $0 435,978 $10,857,175 340,991 $2,127,827
2015-10 0 $0 31,650 $644,900 34,573 $35,039
2015-09 0 $0 31,648 $681,959 34,570 $33,997
2015-08 0 $0 46,153 $953,851 38,155 $43,278
2015-07 0 $0 22,024 $467,352 26,573 $64,495
2015-06 0 $0 225,107 $5,034,149 55,745 $58,996
2015-05 0 $0 400,145 $9,006,483 92,657 $71,286
2015-04 0 $0 63,384 $1,448,334 67,931 $71,489
2015-03 0 $0 1,509,431 $32,939,726 98,976 $224,488
2015-02 0 $0 132,381 $3,230,717 72,381 $144,106
2015-01 0 $0 153,786 $3,797,193 77,380 $145,557
2014-12 0 $0 575,680 $13,711,811 421,104 $819,295
2014-11 0 $0 360,495 $8,739,832 307,541 $705,375
2014-05 1,370,000 $12,764,495 0 $0 0 $0

Table 2. Detailed insider stock purchases, sales, and option exercises of Zendesk, Inc. insiders (ZEN)
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
2019-05-22 Curtis Michael John Option Ex 601 .00 0
2019-05-22 Marooney Caryn Option Ex 3,887 .00 0
2019-05-22 Frandsen Michael Lyle Option Ex 3,887 .00 0
2019-05-22 Koplow Hilarie A. Option Ex 3,887 .00 0
2019-05-22 Stalder Dana Option Ex 3,887 .00 0
2019-05-22 Bass Carl Option Ex 3,887 .00 0
2019-05-22 Szkutak Thomas J Option Ex 1,659 .00 0
2019-05-22 Nelson Elizabeth A Option Ex 3,887 .00 0
2019-05-22 Wilson L Michelle Option Ex 3,887 .00 0
2019-05-20 Gomez Elena (Chief Financial Officer) Sale 5,500 86.51 475,805
2019-05-20 Gomez Elena (Chief Financial Officer) Option Ex 2,500 23.44 58,600
2019-05-17 Gennaro Norman (SVP, Worldwide Sales) Sale 753 88.16 66,384
2019-05-17 Mcdermott Adrian (President of Products) Sale 715 88.16 63,034
2019-05-17 Titterton Jeffrey J (Chief Marketing Officer) Sale 503 88.16 44,344
2019-05-16 Gomez Elena (Chief Financial Officer) Sale 455 87.09 39,625
2019-05-16 Mcdermott Adrian (President of Products) Sale 446 87.09 38,842
2019-05-15 Gennaro Norman (SVP, Worldwide Sales) Option Ex 2,721 .00 0
2019-05-15 Gomez Elena (Chief Financial Officer) Option Ex 4,207 .00 0
2019-05-15 Svane Mikkel (Chair and CEO) Sale 50,000 85.69 4,284,250
2019-05-15 Svane Mikkel (Chair and CEO) Option Ex 2,261 .00 0
2019-05-15 Mcdermott Adrian (President of Products) Option Ex 1,422 .00 0
2019-05-15 Geschke John (CLO and SVP Administration) Option Ex 1,086 .00 0
2019-05-15 Keiser John T. (Chief Operating Officer) Option Ex 4,141 .00 0
2019-05-15 Titterton Jeffrey J (Chief Marketing Officer) Option Ex 1,777 .00 0
2019-05-10 Geschke John (CLO and SVP Administration) Sale 2,500 87.60 218,990
2019-05-10 Geschke John (CLO and SVP Administration) Option Ex 2,500 9.52 23,800
2019-05-06 Mcdermott Adrian (President of Products) Sale 6,213 85.09 528,689
2019-05-06 Mcdermott Adrian (President of Products) Option Ex 5,226 6.24 32,610
2019-04-24 Svane Mikkel (Chair and CEO) Option Ex 100 9.52 952
2019-04-22 Gomez Elena (Chief Financial Officer) Sale 5,500 80.87 444,785
2019-04-22 Gomez Elena (Chief Financial Officer) Option Ex 2,500 23.44 58,600
2019-04-17 Gennaro Norman (SVP, Worldwide Sales) Sale 753 82.01 61,753
2019-04-17 Titterton Jeffrey J (Chief Marketing Officer) Sale 503 82.01 41,251
2019-04-15 Gennaro Norman (SVP, Worldwide Sales) Option Ex 2,721 .00 0
2019-04-15 Gomez Elena (Chief Financial Officer) Option Ex 4,208 .00 0
2019-04-15 Svane Mikkel (Chair and CEO) Option Ex 2,259 .00 0
2019-04-15 Mcdermott Adrian (President of Products) Option Ex 1,421 .00 0
2019-04-15 Geschke John (CLO and SVP Administration) Sale 2,500 83.67 209,177
2019-04-15 Geschke John (CLO and SVP Administration) Option Ex 3,588 1.90 6,831
2019-04-15 Keiser John T. (Chief Operating Officer) Option Ex 4,142 .00 0
2019-04-15 Titterton Jeffrey J (Chief Marketing Officer) Option Ex 1,778 .00 0
2019-03-20 Gomez Elena (Chief Financial Officer) Sale 5,500 83.54 459,470
2019-03-20 Gomez Elena (Chief Financial Officer) Option Ex 2,500 23.44 58,600
2019-03-19 Gennaro Norman (SVP, Worldwide Sales) Sale 753 83.41 62,807
2019-03-19 Titterton Jeffrey J (Chief Marketing Officer) Sale 503 83.41 41,955
2019-03-15 Gennaro Norman (SVP, Worldwide Sales) Option Ex 2,721 .00 0
2019-03-15 Gomez Elena (Chief Financial Officer) Option Ex 4,209 .00 0
2019-03-15 Svane Mikkel (Chair and CEO) Option Ex 2,261 .00 0
2019-03-15 Mcdermott Adrian (President of Products) Option Ex 1,422 .00 0
2019-03-15 Geschke John (CLO and SVP Administration) Option Ex 1,087 .00 0
2019-03-15 Keiser John T. (Chief Operating Officer) Option Ex 4,141 .00 0
2019-03-15 Titterton Jeffrey J (Chief Marketing Officer) Option Ex 1,776 .00 0
2019-03-13 Geschke John (CLO and SVP Administration) Sale 2,500 82.28 205,710
2019-03-13 Geschke John (CLO and SVP Administration) Option Ex 2,500 9.52 23,800
2019-02-21 Gomez Elena (Chief Financial Officer) Sale 5,500 76.58 421,190
2019-02-21 Gomez Elena (Chief Financial Officer) Option Ex 2,500 23.44 58,600
2019-02-20 Gennaro Norman (SVP, Worldwide Sales) Sale 752 78.06 58,701
2019-02-20 Gomez Elena (Chief Financial Officer) Sale 500 78.06 39,030
2019-02-20 Mcdermott Adrian (President of Products) Sale 2,304 78.06 179,850
2019-02-20 Geschke John (CLO and SVP Administration) Sale 19,341 78.46 1,517,552
2019-02-20 Geschke John (CLO and SVP Administration) Option Ex 17,000 9.52 161,840
2019-02-20 Titterton Jeffrey J (Chief Marketing Officer) Sale 506 78.06 39,498
2019-02-19 Svane Mikkel (Chair and CEO) Sale 50,000 78.61 3,930,400
2019-02-19 Nelson Elizabeth A Sale 5,000 78.11 390,570
2019-02-15 Gennaro Norman (SVP, Worldwide Sales) Option Ex 2,719 .00 0
2019-02-15 Gomez Elena (Chief Financial Officer) Option Ex 4,208 .00 0
2019-02-15 Svane Mikkel (Chair and CEO) Option Ex 3,113 .00 0
2019-02-15 Mcdermott Adrian (President of Products) Option Ex 4,029 .00 0
2019-02-15 Geschke John (CLO and SVP Administration) Option Ex 1,324 .00 0
2019-02-15 Keiser John T. (Chief Operating Officer) Option Ex 4,142 .00 0
2019-02-15 Titterton Jeffrey J (Chief Marketing Officer) Option Ex 1,777 .00 0
2019-02-11 Gennaro Norman (SVP, Worldwide Sales) Sale 6,820 77.00 525,140
2019-02-11 Marooney Caryn Sale 2,719 77.00 209,363
2019-02-04 Gomez Elena (Chief Financial Officer) Sale 2,000 70.00 140,000
2019-02-04 Gomez Elena (Chief Financial Officer) Option Ex 2,000 23.44 46,880
2019-01-23 Gomez Elena (Chief Financial Officer) Sale 500 65.00 32,500
2019-01-18 Gomez Elena (Chief Financial Officer) Sale 1,500 65.00 97,500
2019-01-17 Mcdermott Adrian (President of Products) Sale 2,241 63.11 141,429
2019-01-17 Titterton Jeffrey J (Chief Marketing Officer) Sale 472 63.11 29,787
2019-01-15 Gennaro Norman (SVP, Worldwide Sales) Option Ex 28,750 .00 0
2019-01-15 Gomez Elena (Chief Financial Officer) Option Ex 3,869 .00 0
2019-01-15 Svane Mikkel (Chairman and CEO) Option Ex 2,657 .00 0
2019-01-15 Mcdermott Adrian (President of Products) Option Ex 3,597 .00 0
2019-01-15 Geschke John (CLO and SVP Administration) Option Ex 1,093 .00 0
2019-01-15 Keiser John T. (Chief Operating Officer) Option Ex 3,811 .00 0
2019-01-15 Titterton Jeffrey J (Chief Marketing Officer) Option Ex 1,601 .00 0
2019-01-10 Geschke John (CLO and SVP Administration) Sale 7,000 62.55 437,885
2019-01-10 Geschke John (CLO and SVP Administration) Option Ex 7,000 9.52 66,640
2019-01-08 Wilson L Michelle Sale 19,586 63.37 1,241,184
2018-12-19 Mcdermott Adrian (President of Products) Sale 1,809 55.41 100,236
2018-12-19 Titterton Jeffrey J (Chief Marketing Officer) Sale 402 55.41 22,274
2018-12-15 Gomez Elena (Chief Financial Officer) Option Ex 3,869 .00 0
2018-12-15 Svane Mikkel (Chairman and CEO) Option Ex 2,656 .00 0
2018-12-15 Mcdermott Adrian (President of Products) Option Ex 3,597 .00 0
2018-12-15 Geschke John (CLO and SVP Administration) Option Ex 1,091 .00 0
2018-12-15 Keiser John T. (Chief Operating Officer) Option Ex 3,809 .00 0
2018-12-15 Titterton Jeffrey J (Chief Marketing Officer) Option Ex 1,599 .00 0
2018-12-12 Geschke John (CLO and SVP Administration) Sale 7,000 61.45 430,164
2018-12-12 Geschke John (CLO and SVP Administration) Option Ex 7,000 9.52 66,640
2018-12-12 Wilson L Michelle Sale 414 62.58 25,909
2018-11-30 Keiser John T. (Chief Operating Officer) Sale 4,467 60.00 268,020
2018-11-19 Mcdermott Adrian (President of Products) Sale 1,810 54.54 98,717
2018-11-19 Titterton Jeffrey J (Chief Marketing Officer) Sale 402 54.54 21,925
2018-11-15 Gomez Elena (Chief Financial Officer) Option Ex 3,869 .00 0
2018-11-15 Svane Mikkel (Chairman and CEO) Sale 50,000 53.12 2,655,850
2018-11-15 Svane Mikkel (Chairman and CEO) Option Ex 2,657 .00 0
2018-11-15 Mcdermott Adrian (President of Products) Option Ex 3,597 .00 0
2018-11-15 Geschke John (CLO and SVP Administration) Option Ex 1,091 .00 0
2018-11-15 Keiser John T. (Chief Operating Officer) Option Ex 3,812 .00 0
2018-11-15 Titterton Jeffrey J (Chief Marketing Officer) Option Ex 1,601 .00 0
2018-11-13 Geschke John (CLO and SVP Administration) Sale 7,000 53.31 373,177
2018-11-13 Geschke John (CLO and SVP Administration) Option Ex 7,000 9.52 66,640
2018-11-07 Wilson L Michelle Sale 20,000 57.70 1,153,960
2018-10-17 Mcdermott Adrian (President of Products) Sale 1,809 63.70 115,233
2018-10-17 Titterton Jeffrey J (Chief Marketing Officer) Sale 264 63.70 16,816
2018-10-15 Gomez Elena (Chief Financial Officer) Option Ex 3,869 .00 0
2018-10-15 Svane Mikkel (Chairman and CEO) Option Ex 2,656 .00 0
2018-10-15 Mcdermott Adrian (President of Products) Option Ex 3,596 .00 0
2018-10-15 Geschke John (CLO and SVP Administration) Sale 5,000 60.74 303,705
2018-10-15 Geschke John (CLO and SVP Administration) Option Ex 6,092 1.59 9,668
2018-10-15 Keiser John T. (Chief Operating Officer) Option Ex 3,810 .00 0
2018-10-15 Titterton Jeffrey J (Chief Marketing Officer) Option Ex 1,600 .00 0
2018-10-05 Gomez Elena (Chief Financial Officer) Sale 1,000 66.51 66,510
2018-10-05 Gomez Elena (Chief Financial Officer) Option Ex 1,000 23.44 23,440
2018-09-20 Gomez Elena (Chief Financial Officer) Sale 500 67.20 33,600
2018-09-19 Titterton Jeffrey J (SVP, Marketing) Sale 264 68.46 18,073
2018-09-17 Geschke John (CLO and SVP Administration) Sale 5,000 69.71 348,564
2018-09-17 Geschke John (CLO and SVP Administration) Option Ex 5,000 9.52 47,600
2018-09-15 Gomez Elena (Chief Financial Officer) Option Ex 3,868 .00 0
2018-09-15 Svane Mikkel (Chairman and CEO) Option Ex 2,656 .00 0
2018-09-15 Mcdermott Adrian (President of Products) Option Ex 3,597 .00 0
2018-09-15 Geschke John (CLO and SVP Administration) Option Ex 1,092 .00 0
2018-09-15 Keiser John T. (Chief Operating Officer) Option Ex 3,810 .00 0
2018-09-15 Titterton Jeffrey J (SVP, Marketing) Option Ex 1,599 .00 0
2018-09-12 Nelson Elizabeth A Sale 10,000 70.42 704,210
2018-09-10 Gomez Elena (Chief Financial Officer) Sale 4,000 70.00 280,000
2018-09-10 Gomez Elena (Chief Financial Officer) Option Ex 4,000 27.06 108,240
2018-09-06 Gomez Elena (Chief Financial Officer) Sale 1,000 68.00 68,000
2018-09-06 Gomez Elena (Chief Financial Officer) Option Ex 1,000 23.44 23,440
2018-08-23 Gomez Elena (Chief Financial Officer) Sale 7,000 65.00 455,000
2018-08-23 Gomez Elena (Chief Financial Officer) Option Ex 5,000 23.44 117,200
2018-08-17 Mcdermott Adrian (President of Products) Sale 1,811 62.10 112,463
2018-08-17 Keiser John T. (Chief Operating Officer) Sale 1,489 62.10 92,466
2018-08-17 Titterton Jeffrey J (SVP, Marketing) Sale 264 62.10 16,394
2018-08-15 Gomez Elena (Chief Financial Officer) Option Ex 3,869 .00 0
2018-08-15 Svane Mikkel (Chairman and CEO) Sale 50,000 62.46 3,123,050
2018-08-15 Svane Mikkel (Chairman and CEO) Option Ex 2,657 .00 0
2018-08-15 Mcdermott Adrian (President of Products) Option Ex 3,598 .00 0
2018-08-15 Geschke John (CLO and SVP Administration) Sale 7,666 62.44 478,680
2018-08-15 Geschke John (CLO and SVP Administration) Option Ex 8,758 2.25 19,714

Insider trading activities including stock purchases, stock sales, and option exercises of ZEN listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Zendesk, Inc. (symbol ZEN, CIK number 1463172) see the Securities and Exchange Commission (SEC) website.