Insider Trading activities of Zendesk, Inc. insiders.

Monthly summaries of insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Zendesk, Inc. 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 $145,654,485.
The total value of stock option exercises since 2005 is $13,398,362.


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
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 ($)   Value ($)
2018-04-20 Gomez Elena (Chief Financial Officer) Sale 500 49.67 24,835
2018-04-19 Mcdermott Adrian (President of Products) Sale 1,425 50.16 71,478
2018-04-17 Gomez Elena (Chief Financial Officer) Sale 2,500 50.00 125,000
2018-04-17 Gomez Elena (Chief Financial Officer) Option Ex 2,500 23.44 58,600
2018-04-16 Geschke John (CLO and SVP Administration) Sale 5,000 49.03 245,159
2018-04-16 Geschke John (CLO and SVP Administration) Option Ex 5,000 7.88 39,400
2018-04-15 Gomez Elena (Chief Financial Officer) Option Ex 3,868 .00 0
2018-04-15 Svane Mikkel (Chairman and CEO) Option Ex 2,655 .00 0
2018-04-15 Mcdermott Adrian (President of Products) Option Ex 3,596 .00 0
2018-04-15 Geschke John (CLO and SVP Administration) Option Ex 1,092 .00 0
2018-04-15 Keiser John T. (Chief Operating Officer) Option Ex 3,810 .00 0
2018-03-27 Gomez Elena (Chief Financial Officer) Sale 5,000 50.00 250,000
2018-03-27 Gomez Elena (Chief Financial Officer) Option Ex 5,000 23.44 117,200
2018-03-20 Gomez Elena (Chief Financial Officer) Sale 500 46.04 23,020
2018-03-20 Mcdermott Adrian (President of Products) Sale 1,425 46.04 65,607
2018-03-15 Gomez Elena (Chief Financial Officer) Option Ex 3,870 .00 0
2018-03-15 Svane Mikkel (Chairman and CEO) Option Ex 2,656 .00 0
2018-03-15 Mcdermott Adrian (President of Products) Option Ex 3,597 .00 0
2018-03-15 Geschke John (CLO and SVP Administration) Option Ex 1,092 .00 0
2018-03-15 Keiser John T. (Chief Operating Officer) Option Ex 3,810 .00 0
2018-02-28 Mcdermott Adrian (President of Products) Sale 40,000 43.54 1,741,560
2018-02-28 Mcdermott Adrian (President of Products) Option Ex 40,000 6.24 249,600
2018-02-21 Mcdermott Adrian (President of Products) Sale 1,425 43.00 61,275
2018-02-20 Gomez Elena (Chief Financial Officer) Sale 500 41.99 20,995
2018-02-15 Gomez Elena (Chief Financial Officer) Option Ex 3,867 .00 0
2018-02-15 Svane Mikkel (Chairman and CEO) Option Ex 2,655 .00 0
2018-02-15 Mcdermott Adrian (President of Products) Option Ex 3,595 .00 0
2018-02-15 Geschke John (CLO and SVP Administration) Option Ex 1,090 .00 0
2018-02-15 Keiser John T. (Chief Operating Officer) Option Ex 3,810 .00 0
2018-02-14 Mcdermott Adrian (President of Products) Sale 40,000 41.72 1,668,839
2018-02-14 Mcdermott Adrian (President of Products) Option Ex 40,000 6.24 249,600
2018-02-13 Geschke John (CLO and SVP Administration) Sale 5,000 40.91 204,555
2018-02-13 Geschke John (CLO and SVP Administration) Option Ex 5,000 9.52 47,600
2018-02-12 Nelson Elizabeth A Sale 10,000 40.02 400,220
2018-02-09 Mcdermott Adrian (President of Products) Sale 49,700 39.07 1,941,977
2018-02-09 Mcdermott Adrian (President of Products) Option Ex 49,700 6.24 310,128
2018-02-09 Geschke John (CLO and SVP Administration) Sale 5,000 38.78 193,900
2018-02-09 Geschke John (CLO and SVP Administration) Option Ex 5,000 6.24 31,200
2018-02-09 Nelson Elizabeth A Sale 10,000 39.00 390,000
2018-02-08 Svane Mikkel (Chairman and CEO) Sale 50,000 39.03 1,951,550
2018-02-08 Mcdermott Adrian (President of Products) Sale 300 40.00 12,000
2018-02-08 Mcdermott Adrian (President of Products) Option Ex 300 6.24 1,872
2018-01-19 Mcdermott Adrian (President of Products) Sale 1,593 36.27 57,778
2018-01-16 Geschke John (CLO and SVP Administration) Sale 5,000 37.80 189,025
2018-01-16 Geschke John (CLO and SVP Administration) Option Ex 5,000 9.52 47,600
2018-01-15 Gomez Elena (Chief Financial Officer) Option Ex 3,149 .00 0
2018-01-15 Svane Mikkel (Chairman and CEO) Option Ex 1,898 .00 0
2018-01-15 Mcdermott Adrian (President of Products) Option Ex 3,063 .00 0
2018-01-15 Geschke John (CLO and SVP Administration) Option Ex 631 .00 0
2018-01-15 Keiser John T. (Chief Operating Officer) Option Ex 3,116 .00 0
2018-01-12 Geschke John (CLO and SVP Administration) Sale 5,000 36.95 184,740
2018-01-12 Geschke John (CLO and SVP Administration) Option Ex 5,000 6.24 31,200
2018-01-08 Geschke John (CLO and SVP Administration) Sale 1,493 35.17 52,510
2018-01-08 Geschke John (CLO and SVP Administration) Option Ex 1,493 9.52 14,213
2018-01-05 Geschke John (CLO and SVP Administration) Sale 320 35.00 11,200
2018-01-05 Geschke John (CLO and SVP Administration) Option Ex 320 9.52 3,046
2018-01-04 Geschke John (CLO and SVP Administration) Sale 2,400 35.05 84,112
2018-01-04 Geschke John (CLO and SVP Administration) Option Ex 2,400 9.52 22,848
2018-01-03 Geschke John (CLO and SVP Administration) Sale 787 35.05 27,584
2018-01-03 Geschke John (CLO and SVP Administration) Option Ex 787 9.52 7,492
2017-12-20 Gomez Elena (Chief Financial Officer) Sale 1,200 33.66 40,395
2017-12-20 Mcdermott Adrian (President of Products) Sale 1,353 34.19 46,259
2017-12-15 Gomez Elena (Chief Financial Officer) Option Ex 3,151 .00 0
2017-12-15 Svane Mikkel (Chairman and CEO) Option Ex 1,898 .00 0
2017-12-15 Mcdermott Adrian (President of Products) Option Ex 3,064 .00 0
2017-12-15 Geschke John (CLO and SVP Administration) Option Ex 632 .00 0
2017-12-15 Keiser John T. (Chief Operating Officer) Option Ex 3,117 .00 0
2017-12-13 Geschke John (CLO and SVP Administration) Sale 5,000 34.23 171,130
2017-12-13 Geschke John (CLO and SVP Administration) Option Ex 5,000 6.24 31,200
2017-11-22 Gomez Elena (Chief Financial Officer) Sale 8,079 35.00 282,765
2017-11-22 Gomez Elena (Chief Financial Officer) Option Ex 8,079 23.44 189,371
2017-11-21 Gomez Elena (Chief Financial Officer) Sale 2,921 35.00 102,235
2017-11-21 Gomez Elena (Chief Financial Officer) Option Ex 1,921 23.44 45,028
2017-11-20 Gomez Elena (Chief Financial Officer) Sale 1,200 34.40 41,283
2017-11-20 Mcdermott Adrian (President of Products) Sale 1,679 34.39 57,740
2017-11-17 Gomez Elena (Chief Financial Officer) Sale 404 34.27 13,845
2017-11-15 Gomez Elena (Chief Financial Officer) Option Ex 3,149 .00 0
2017-11-15 Svane Mikkel (Chairman and CEO) Sale 50,000 34.31 1,715,550
2017-11-15 Svane Mikkel (Chairman and CEO) Option Ex 1,897 .00 0
2017-11-15 Mcdermott Adrian (President of Products) Option Ex 3,063 .00 0
2017-11-15 Geschke John (CLO and SVP Administration) Option Ex 630 .00 0
2017-11-15 Keiser John T. (Chief Operating Officer) Option Ex 3,116 .00 0
2017-11-14 Geschke John (CLO and SVP Administration) Sale 273 35.00 9,555
2017-11-13 Geschke John (CLO and SVP Administration) Sale 9,727 35.09 341,349
2017-11-13 Geschke John (CLO and SVP Administration) Option Ex 10,000 7.88 78,800
2017-11-08 Gomez Elena (Chief Financial Officer) Sale 17,845 35.00 624,628
2017-11-08 Gomez Elena (Chief Financial Officer) Option Ex 17,067 23.44 400,050
2017-11-08 Geschke John (CLO and SVP Administration) Sale 4,800 35.46 170,198
2017-11-08 Geschke John (CLO and SVP Administration) Option Ex 4,800 9.52 45,696
2017-11-02 Gomez Elena (Chief Financial Officer) Sale 13,155 35.00 460,425
2017-11-02 Gomez Elena (Chief Financial Officer) Option Ex 12,933 23.44 303,149
2017-11-02 Geschke John (CLO and SVP Administration) Sale 30,200 34.39 1,038,698
2017-11-02 Geschke John (CLO and SVP Administration) Option Ex 30,200 7.88 237,976
2017-10-19 Gomez Elena (Chief Financial Officer) Sale 1,200 30.10 36,123
2017-10-19 Mcdermott Adrian (President of Products) Sale 1,767 30.10 53,186
2017-10-15 Gomez Elena (Chief Financial Officer) Option Ex 3,150 .00 0
2017-10-15 Svane Mikkel (Chairman and CEO) Option Ex 1,898 .00 0
2017-10-15 Mcdermott Adrian (President of Products) Option Ex 3,064 .00 0
2017-10-15 Geschke John (CLO and SVP Administration) Option Ex 632 .00 0
2017-10-15 Keiser John T. (Chief Operating Officer) Option Ex 3,117 .00 0
2017-09-20 Gomez Elena (Chief Financial Officer) Sale 1,200 28.87 34,644
2017-09-20 Mcdermott Adrian (President of Products) Sale 1,766 28.87 50,984
2017-09-15 Cox Bryan (Chief Revenue Officer) Option Ex 4,401 .00 0
2017-09-15 Gomez Elena (Chief Financial Officer) Option Ex 3,151 .00 0
2017-09-15 Svane Mikkel (Chairman and CEO) Option Ex 1,898 .00 0
2017-09-15 Mcdermott Adrian (President of Products) Option Ex 3,064 .00 0
2017-09-15 Geschke John (CLO and SVP Administration) Option Ex 631 .00 0
2017-09-15 Keiser John T. (Chief Operating Officer) Option Ex 3,117 .00 0
2017-09-11 Geschke John (CLO and SVP Administration) Sale 10,000 29.33 293,310
2017-09-11 Geschke John (CLO and SVP Administration) Option Ex 10,000 6.24 62,400
2017-08-30 Marooney Caryn Sale 1,693 27.35 46,303
2017-08-30 Marooney Caryn Option Ex 3,386 9.16 31,015
2017-08-18 Mcdermott Adrian (President of Products) Sale 1,766 26.42 46,657
2017-08-15 Cox Bryan (Chief Revenue Officer) Option Ex 4,399 .00 0
2017-08-15 Gomez Elena (Chief Financial Officer) Sale 1,431 27.05 38,715
2017-08-15 Gomez Elena (Chief Financial Officer) Option Ex 3,149 .00 0
2017-08-15 Svane Mikkel (Chairman and CEO) Option Ex 1,898 .00 0
2017-08-15 Mcdermott Adrian (President of Products) Option Ex 3,063 .00 0
2017-08-15 Geschke John (CLO and SVP Administration) Option Ex 632 .00 0
2017-08-15 Keiser John T. (Chief Operating Officer) Option Ex 3,116 .00 0
2017-08-14 Cox Bryan (Chief Revenue Officer) Sale 5,000 26.98 134,885
2017-08-07 Svane Mikkel (Chairman and CEO) Sale 50,000 28.40 1,419,850
2017-08-07 Keiser John T. (Chief Operating Officer) Sale 10,000 29.00 290,000
2017-07-31 Marooney Caryn Sale 1,693 30.10 50,959
2017-07-31 Marooney Caryn Option Ex 3,385 9.16 31,006
2017-07-20 Mcdermott Adrian (President of Products) Sale 1,766 29.11 51,408
2017-07-19 Geschke John (CLO and SVP Administration) Sale 5,000 29.02 145,110
2017-07-19 Geschke John (CLO and SVP Administration) Option Ex 5,000 6.24 31,200
2017-07-15 Cox Bryan (Chief Revenue Officer) Option Ex 4,400 .00 0
2017-07-15 Gomez Elena (Chief Financial Officer) Option Ex 3,150 .00 0
2017-07-15 Svane Mikkel (Chairman and CEO) Option Ex 1,899 .00 0
2017-07-15 Mcdermott Adrian (President of Products) Option Ex 3,063 .00 0
2017-07-15 Geschke John (CLO and SVP Administration) Option Ex 631 .00 0
2017-07-15 Keiser John T. (CIO SVP, Technology Ops.) Option Ex 3,117 .00 0
2017-06-30 Marooney Caryn Sale 26,970 27.56 743,293
2017-06-30 Marooney Caryn Option Ex 34,983 9.16 320,444
2017-06-23 Geschke John (CLO and SVP Administration) Sale 10,000 29.34 293,380
2017-06-23 Geschke John (CLO and SVP Administration) Option Ex 10,000 6.24 62,400
2017-06-20 Mcdermott Adrian (President of Products) Sale 1,766 27.61 48,759
2017-06-15 Cox Bryan (Chief Revenue Officer) Option Ex 4,399 .00 0
2017-06-15 Gomez Elena (Chief Financial Officer) Option Ex 3,149 .00 0
2017-06-15 Svane Mikkel (Chairman and CEO) Option Ex 1,897 .00 0
2017-06-15 Mcdermott Adrian (President of Products) Option Ex 3,063 .00 0
2017-06-15 Geschke John (CLO and SVP Administration) Option Ex 630 .00 0
2017-06-15 Keiser John T. (CIO SVP, Technology Ops.) Option Ex 3,115 .00 0
2017-05-30 Marooney Caryn Sale 1,693 26.54 44,932
2017-05-30 Marooney Caryn Option Ex 3,385 9.16 31,006
2017-05-26 Cox Bryan (Chief Revenue Officer) Sale 8,000 26.23 209,808
2017-05-22 Marooney Caryn Sale 3,331 24.76 82,475
2017-05-18 Gomez Elena (Chief Financial Officer) Sale 21,781 25.46 554,478

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.