Insider Trading activities of Cabot Corp insiders.

Monthly summaries of insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Cabot Corp since 2005 are illustrated in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Cabot Corp since year 2005. Table 2 shows the detailed insider transactions of Cabot Corp since 2005. The reporting company's ticker symbol is CBT. The reporting company's CIK number is 16040.
The total value of stock buying since 2005 is $145,275,785.
The total value of stock sales since 2005 is $174,597,402.
The total value of stock option exercises since 2005 is $38,173,607.


Table 1. Monthly summaries of insider stock purchases, sales, and option exercises for Cabot Corp (CBT).
Trading Period Insider Buying Insider Sales Option Exercises
year-month Shares Value Shares Value Shares Value
2017-09 0 $0 3,881 $207,206 3,881 $65,588
2017-03 0 $0 106,741 $6,269,737 106,741 $3,762,619
2017-02 0 $0 330,874 $19,077,166 364,202 $13,224,953
2017-01 0 $0 2,500 $137,375 0 $0
2016-11 0 $0 105,890 $5,512,982 105,890 $2,420,791
2016-09 0 $0 2,500 $132,375 0 $0
2016-08 0 $0 115,146 $5,748,216 107,146 $3,086,458
2016-07 0 $0 5,000 $249,750 0 $0
2016-06 0 $0 60,000 $2,777,880 60,000 $1,013,998
2016-03 0 $0 72,225 $3,273,830 72,225 $1,220,601
2015-04 0 $0 4,041 $193,765 4,041 $68,292
2015-02 0 $0 39,530 $1,855,813 30,034 $507,573
2014-11 0 $0 8,833 $416,605 8,000 $168,560
2014-08 0 $0 3,493 $187,469 0 $0
2014-06 0 $0 113,000 $6,668,768 55,200 $1,090,378
2014-05 0 $0 18,494 $1,053,903 15,000 $253,499
2014-04 0 $0 15,000 $888,225 15,000 $253,499
2014-03 0 $0 61,122 $3,344,795 49,194 $1,366,166
2014-02 0 $0 18,494 $926,680 15,000 $253,499
2013-12 0 $0 131,252 $6,396,114 93,500 $1,820,773
2013-11 0 $0 13,494 $635,907 0 $0
2013-09 0 $0 60,000 $2,545,709 43,000 $726,699
2013-01 0 $0 20,782 $901,017 0 $0
2012-12 0 $0 56,620 $2,264,800 56,620 $1,046,314
2012-05 0 $0 200 $8,994 0 $0
2012-03 0 $0 99,000 $4,243,050 90,000 $2,429,399
2012-02 0 $0 85,500 $3,480,000 55,500 $937,948
2011-11 0 $0 3,100 $101,896 0 $0
2011-02 0 $0 32,000 $1,404,400 0 $0
2010-09 0 $0 16,826 $506,630 0 $0
2010-08 0 $0 52,640 $1,560,184 0 $0
2010-02 0 $0 2,503 $74,864 0 $0
2009-09 5,000 $103,770 0 $0 0 $0
2009-08 0 $0 13,209 $261,392 0 $0
2009-06 0 $0 18,492 $303,509 0 $0
2009-05 0 $0 3,833,755 $59,851,607 0 $0
2009-03 10,000 $85,700 89,500 $802,815 0 $0
2008-10 0 $0 326,100 $9,487,464 0 $0
2008-08 0 $0 7,500 $200,280 0 $0
2008-06 0 $0 1,000 $32,009 0 $0
2008-02 8,000 $225,680 0 $0 0 $0
2008-01 559,800 $17,653,272 0 $0 0 $0
2007-12 1,086,242 $36,184,383 0 $0 0 $0
2007-06 0 $0 271,481 $13,000,530 0 $0
2007-04 109,000 $5,001,034 0 $0 0 $0
2007-01 0 $0 1,000 $43,456 0 $0
2006-12 0 $0 9,500 $399,161 0 $0
2006-11 0 $0 111,800 $4,763,077 90,000 $2,456,000
2006-08 174,000 $5,434,274 0 $0 0 $0
2006-07 327,900 $10,455,020 0 $0 0 $0
2006-06 54,800 $1,785,065 11,100 $370,970 0 $0
2006-02 54,200 $2,001,968 0 $0 0 $0
2006-01 308,350 $11,573,879 0 $0 0 $0
2005-12 186,100 $6,594,639 4,000 $139,280 0 $0
2005-11 1,350,800 $42,444,559 4,000 $130,020 0 $0
2005-10 169,800 $5,497,026 0 $0 0 $0
2005-09 0 $0 2,000 $63,160 0 $0
2005-08 28 $976 12,335 $417,535 0 $0
2005-06 8,000 $234,540 37,647 $1,211,002 0 $0
2005-05 0 $0 2,662 $74,030 0 $0

Table 2. Detailed insider stock purchases, sales, and option exercises of Cabot Corp insiders (CBT)
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
2017-09-14 Kalkstein Hobart (Senior Vice President) Sale 3,881 53.39 207,206
2017-09-14 Kalkstein Hobart (Senior Vice President) Option Ex 3,881 16.90 65,588
2017-03-03 Prevost Patrick M. (Director) Sale 45,378 58.22 2,641,907
2017-03-03 Prevost Patrick M. (Director) Option Ex 45,378 35.25 1,599,574
2017-03-02 Prevost Patrick M. (Director) Sale 14,719 58.97 867,905
2017-03-02 Prevost Patrick M. (Director) Option Ex 14,719 35.25 518,844
2017-03-01 Prevost Patrick M. (Director) Sale 46,644 59.17 2,759,925
2017-03-01 Prevost Patrick M. (Director) Option Ex 46,644 35.25 1,644,201
2017-02-21 Prevost Patrick M. (Director) Sale 92,562 58.22 5,388,959
2017-02-21 Prevost Patrick M. (Director) Option Ex 92,562 34.64 3,206,347
2017-02-17 Prevost Patrick M. (Director) Option Ex 40,328 55.37 2,232,961
2017-02-13 Kalkstein Hobart (Senior Vice President) Sale 3,124 58.12 181,566
2017-02-13 Kalkstein Hobart (Senior Vice President) Option Ex 3,124 16.90 52,795
2017-02-10 Kalkstein Hobart (Senior Vice President) Sale 4,405 58.20 256,371
2017-02-10 Kalkstein Hobart (Senior Vice President) Option Ex 4,405 16.90 74,444
2017-02-09 Prevost Patrick M. (Director) Sale 62,400 57.48 3,586,752
2017-02-09 Prevost Patrick M. (Director) Option Ex 62,400 32.95 2,056,080
2017-02-08 Von Gottberg Friedrich (Senior Vice President) Sale 19,662 56.89 1,118,571
2017-02-08 Von Gottberg Friedrich (Senior Vice President) Option Ex 19,662 35.25 693,085
2017-02-07 Prevost Patrick M. (Director) Sale 48,902 57.23 2,798,661
2017-02-07 Prevost Patrick M. (Director) Option Ex 48,902 32.95 1,611,320
2017-02-07 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 14,536 57.67 838,363
2017-02-07 Cordeiro Eduardo E (Executive Vice President, CFO) Option Ex 14,536 37.40 543,573
2017-02-06 Von Gottberg Friedrich (Senior Vice President) Sale 15,909 57.42 913,494
2017-02-06 Von Gottberg Friedrich (Senior Vice President) Option Ex 15,909 34.64 551,087
2017-02-06 Cross Nicholas S. (Executive Vice President) Sale 7,000 57.79 404,530
2017-02-06 Berube Brian A (SVP, General Counsel) Sale 39,215 57.56 2,257,215
2017-02-06 Berube Brian A (SVP, General Counsel) Option Ex 39,215 34.10 1,337,231
2017-02-06 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 23,159 57.55 1,332,684
2017-02-06 Cordeiro Eduardo E (Executive Vice President, CFO) Option Ex 23,159 37.40 866,030
2017-01-24 Kelly James Patrick (Vice President and Controller) Sale 2,500 54.95 137,375
2016-11-25 Kalkstein Hobart (Senior Vice President) Sale 4,890 51.80 253,302
2016-11-25 Kalkstein Hobart (Senior Vice President) Option Ex 4,890 16.90 82,641
2016-11-21 Prevost Patrick M. (Director) Sale 51,000 52.28 2,666,280
2016-11-21 Prevost Patrick M. (Director) Option Ex 51,000 23.15 1,180,650
2016-11-15 Prevost Patrick M. (Director) Sale 50,000 51.87 2,593,400
2016-11-15 Prevost Patrick M. (Director) Option Ex 50,000 23.15 1,157,500
2016-09-28 Kelly James Patrick (Vice President and Controller) Sale 2,500 52.95 132,375
2016-08-30 Cross Nicholas S. (Executive Vice President) Sale 13,763 50.59 696,270
2016-08-30 Cross Nicholas S. (Executive Vice President) Option Ex 13,763 35.25 485,145
2016-08-29 Cross Nicholas S. (Executive Vice President) Sale 7,821 50.51 395,038
2016-08-29 Cross Nicholas S. (Executive Vice President) Option Ex 7,821 32.95 257,701
2016-08-25 Prevost Patrick M. (Director) Sale 2,185 49.64 108,463
2016-08-25 Prevost Patrick M. (Director) Option Ex 2,185 23.15 50,582
2016-08-24 Prevost Patrick M. (Director) Sale 45,615 49.59 2,262,047
2016-08-24 Prevost Patrick M. (Director) Option Ex 45,615 23.15 1,055,987
2016-08-23 Prevost Patrick M. (Director) Sale 2,100 50.21 105,441
2016-08-23 Prevost Patrick M. (Director) Option Ex 2,100 23.15 48,615
2016-08-23 Berube Brian A (SVP, General Counsel) Sale 16,489 49.90 822,768
2016-08-23 Berube Brian A (SVP, General Counsel) Option Ex 8,489 34.64 294,058
2016-08-23 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 27,073 49.98 1,353,162
2016-08-23 Cordeiro Eduardo E (Executive Vice President, CFO) Option Ex 27,073 32.95 892,055
2016-08-22 Prevost Patrick M. (Director) Sale 100 50.27 5,027
2016-08-22 Prevost Patrick M. (Director) Option Ex 100 23.15 2,315
2016-07-28 Kelly James Patrick (Vice President and Controller) Sale 2,500 50.95 127,375
2016-07-12 Kelly James Patrick (Vice President and Controller) Sale 2,500 48.95 122,375
2016-06-03 Prevost Patrick M. (Director) Sale 30,000 46.50 1,395,030
2016-06-03 Prevost Patrick M. (Director) Option Ex 30,000 16.90 506,999
2016-06-02 Prevost Patrick M. (Director) Sale 30,000 46.09 1,382,850
2016-06-02 Prevost Patrick M. (Director) Option Ex 30,000 16.90 506,999
2016-03-03 Kelly James Patrick (Vice President and Controller) Sale 12,225 47.05 575,210
2016-03-03 Kelly James Patrick (Vice President and Controller) Option Ex 12,225 16.90 206,602
2016-03-01 Prevost Patrick M. (President and CEO) Sale 60,000 44.98 2,698,620
2016-03-01 Prevost Patrick M. (President and CEO) Option Ex 60,000 16.90 1,013,999
2015-04-30 Kelly James Patrick (Vice President and Controller) Sale 4,041 47.95 193,765
2015-04-30 Kelly James Patrick (Vice President and Controller) Option Ex 4,041 16.90 68,292
2015-02-24 Schmitz Ronaldo H (Director) Sale 5,000 46.85 234,265
2015-02-17 Kelly James Patrick (Vice President and Controller) Sale 34 47.95 1,630
2015-02-17 Kelly James Patrick (Vice President and Controller) Option Ex 34 16.90 574
2015-02-13 Prevost Patrick M. (President and CEO) Sale 30,000 47.08 1,412,370
2015-02-13 Prevost Patrick M. (President and CEO) Option Ex 30,000 16.90 506,999
2015-02-06 Thomas Lydia W (Director) Sale 4,496 46.16 207,548
2014-11-13 Miller David A (Executive Vice President) Sale 8,000 47.19 377,504
2014-11-13 Miller David A (Executive Vice President) Option Ex 8,000 21.07 168,560
2014-11-07 Mcgillicuddy John K (Director) Sale 833 46.94 39,101
2014-08-11 Miller David A (Executive Vice President) Sale 3,493 53.67 187,469
2014-06-11 Macleod Roderick (Director) Sale 57,800 59.51 3,439,678
2014-06-06 Keohane Sean D (Senior Vice President) Sale 25,200 59.33 1,495,015
2014-06-06 Keohane Sean D (Senior Vice President) Option Ex 25,200 23.15 583,380
2014-06-06 Prevost Patrick M. (President and CEO) Sale 15,000 59.32 889,800
2014-06-06 Prevost Patrick M. (President and CEO) Option Ex 15,000 16.90 253,499
2014-06-02 Prevost Patrick M. (President and CEO) Sale 15,000 56.28 844,275
2014-06-02 Prevost Patrick M. (President and CEO) Option Ex 15,000 16.90 253,499
2014-05-12 Miller David A (Executive Vice President) Sale 3,494 58.61 204,783
2014-05-01 Prevost Patrick M. (President and CEO) Sale 15,000 56.61 849,120
2014-05-01 Prevost Patrick M. (President and CEO) Option Ex 15,000 16.90 253,499
2014-04-01 Prevost Patrick M. (President and CEO) Sale 15,000 59.22 888,225
2014-04-01 Prevost Patrick M. (President and CEO) Option Ex 15,000 16.90 253,499
2014-03-06 Berube Brian A (SVP, General Counsel) Sale 12,500 55.17 689,650
2014-03-06 Berube Brian A (SVP, General Counsel) Option Ex 12,500 28.89 361,187
2014-03-06 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 7,515 55.27 415,369
2014-03-05 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 26,107 55.00 1,435,806
2014-03-05 Cordeiro Eduardo E (Executive Vice President, CFO) Option Ex 21,694 34.64 751,480
2014-03-03 Prevost Patrick M. (President and CEO) Sale 15,000 53.60 803,970
2014-03-03 Prevost Patrick M. (President and CEO) Option Ex 15,000 16.90 253,499
2014-02-13 Prevost Patrick M. (President and CEO) Sale 15,000 50.16 752,400
2014-02-13 Prevost Patrick M. (President and CEO) Option Ex 15,000 16.90 253,499
2014-02-12 Miller David A (Executive Vice President) Sale 3,494 49.88 174,280
2013-12-09 Prevost Patrick M. (President and CEO) Sale 13,554 49.34 668,740
2013-12-09 Prevost Patrick M. (President and CEO) Option Ex 13,554 16.90 229,062
2013-12-06 Prevost Patrick M. (President and CEO) Sale 33,500 49.29 1,651,215
2013-12-06 Prevost Patrick M. (President and CEO) Option Ex 16,446 16.90 277,937
2013-12-05 Keohane Sean D (Senior Vice President) Sale 25,000 48.74 1,218,600
2013-12-05 Keohane Sean D (Senior Vice President) Option Ex 25,000 16.90 422,499
2013-12-04 Berube Brian A (SVP, General Counsel) Sale 10,445 48.49 506,446
2013-12-04 Berube Brian A (SVP, General Counsel) Option Ex 5,000 23.15 115,750
2013-12-03 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 48,753 48.23 2,351,113
2013-12-03 Cordeiro Eduardo E (Executive Vice President, CFO) Option Ex 33,500 23.15 775,525
2013-11-14 Miller David A (Executive Vice President) Sale 3,494 47.86 167,212
2013-11-11 Kelly James Patrick (Vice President and Controller) Sale 2,500 47.75 119,375
2013-11-01 Kelly James Patrick (Vice President and Controller) Sale 7,500 46.58 349,320
2013-09-23 Berube Brian A (SVP, General Counsel) Sale 23,000 42.09 968,185
2013-09-23 Berube Brian A (SVP, General Counsel) Option Ex 18,000 16.90 304,200
2013-09-20 Prevost Patrick M. (President and CEO) Sale 12,000 42.80 513,624
2013-09-19 Keohane Sean D (Senior Vice President) Sale 25,000 42.56 1,063,900
2013-09-19 Keohane Sean D (Senior Vice President) Option Ex 25,000 16.90 422,499
2013-01-25 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 15,782 43.50 686,517
2013-01-11 Berube Brian A (SVP, General Counsel) Sale 5,000 42.90 214,500
2012-12-18 Berube Brian A (SVP, General Counsel) Sale 28,620 40.00 1,144,800
2012-12-18 Berube Brian A (SVP, General Counsel) Option Ex 28,620 20.02 573,115
2012-12-18 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 28,000 40.00 1,120,000
2012-12-18 Cordeiro Eduardo E (Executive Vice President, CFO) Option Ex 28,000 16.90 473,199
2012-05-03 Kelly James Patrick (Vice President and Controller) Sale 200 44.97 8,994
2012-03-19 Keohane Sean D (Vice President) Sale 60,000 43.25 2,595,000
2012-03-19 Keohane Sean D (Vice President) Option Ex 60,000 32.04 1,922,400
2012-03-19 Thomas Lydia W (Director) Sale 3,000 42.95 128,850
2012-03-13 Berube Brian A (Vice President,General Counsel) Sale 5,990 43.00 257,570
2012-03-12 Prevost Patrick M. (President and CEO) Sale 30,000 42.04 1,261,200
2012-03-12 Prevost Patrick M. (President and CEO) Option Ex 30,000 16.90 506,999
2012-03-12 Berube Brian A (Vice President,General Counsel) Sale 10 43.00 430
2012-02-03 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 30,000 42.00 1,260,000
2012-02-02 Berube Brian A (Vice President,General Counsel) Sale 13,500 40.00 540,000
2012-02-02 Berube Brian A (Vice President,General Counsel) Option Ex 13,500 16.90 228,149
2012-02-02 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 42,000 40.00 1,680,000
2012-02-02 Cordeiro Eduardo E (Executive Vice President, CFO) Option Ex 42,000 16.90 709,799
2011-11-14 Kelly James Patrick (Vice President and Controller) Sale 3,100 32.87 101,896
2011-02-04 Berube Brian A (Vice President,General Counsel) Sale 12,000 43.95 527,400
2011-02-04 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 20,000 43.85 877,000
2010-09-01 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 16,826 30.11 506,630
2010-08-17 Keohane Sean D (Vice President) Sale 18,676 29.31 547,393
2010-08-10 Berube Brian A (Vice President,General Counsel) Sale 16,564 29.63 490,791
2010-08-10 Cordeiro Eduardo E (Executive Vice President, CFO) Sale 14,500 30.00 435,000
2010-08-02 Kelly James Patrick (Vice President and Controller) Sale 2,900 30.00 87,000
2010-02-18 Kelly James Patrick (Vice President and Controller) Sale 2,503 29.91 74,864
2009-09-14 Schmitz Ronaldo H (Director) Buy 5,000 20.75 103,770
2009-08-14 Keohane Sean D (Vice President) Sale 13,209 19.79 261,392
2009-06-04 Berube Brian A (Vice President,General Counsel) Sale 18,492 16.41 303,509
2009-05-28 Mcdermott Edward H (10% Owner) Sale 3,800,000 15.60 59,280,000
2009-05-18 Brady William J (Executive Vice President) Sale 33,755 16.93 571,607
2009-03-12 Mcdermott Edward H (10% Owner) Sale 89,500 8.97 802,815
2009-03-06 Prevost Patrick M. (President and CEO) Buy 10,000 8.57 85,700
2008-10-07 Patterson William J (10% Owner) Sale 208,400 29.05 6,052,978
2008-10-06 Patterson William J (10% Owner) Sale 117,700 29.18 3,434,486
2008-08-20 Brady William J (Executive Vice President) Sale 7,500 26.70 200,280
2008-06-06 Kelly James Patrick (Vice President and Controller) Sale 1,000 32.01 32,009
2008-02-29 Prevost Patrick M. (President and CEO) Buy 8,000 28.21 225,680
2008-01-14 Patterson William J (10% Owner) Buy 24,100 31.69 765,393
2008-01-11 Patterson William J (10% Owner) Buy 25,800 30.88 800,376
2008-01-10 Patterson William J (10% Owner) Buy 43,900 30.61 1,342,021
2008-01-09 Patterson William J (10% Owner) Buy 48,700 30.71 1,494,735
2008-01-08 Patterson William J (10% Owner) Buy 33,900 31.35 1,064,979
2008-01-04 Patterson William J (10% Owner) Buy 10,600 31.91 337,488
2008-01-03 Patterson William J (10% Owner) Buy 62,500 31.86 1,986,036
2008-01-02 Patterson William J (10% Owner) Buy 97,400 32.85 3,205,971
2007-12-31 Patterson William J (10% Owner) Buy 99,000 33.47 3,315,796
2007-12-28 Patterson William J (10% Owner) Buy 70,200 33.55 2,363,506
2007-12-27 Patterson William J (10% Owner) Buy 56,100 33.30 1,872,807
2007-12-26 Patterson William J (10% Owner) Buy 15,300 33.62 514,309
2007-12-24 Patterson William J (10% Owner) Buy 20,100 33.30 669,777
2007-12-21 Patterson William J (10% Owner) Buy 25,000 33.38 834,550
2007-12-20 Patterson William J (10% Owner) Buy 87,200 33.08 2,887,547
2007-12-19 Patterson William J (10% Owner) Buy 82,600 33.32 2,745,725
2007-12-18 Patterson William J (10% Owner) Buy 31,500 32.89 1,034,293
2007-12-17 Patterson William J (10% Owner) Buy 60,800 32.68 1,989,430
2007-12-14 Patterson William J (10% Owner) Buy 84,900 33.82 2,870,821
2007-12-13 Patterson William J (10% Owner) Buy 34,400 33.99 1,169,428
2007-06-19 Kelly James Patrick (Controller) Sale 1,000 48.00 48,000
2007-06-18 Burnes Kennett F (Chairman, CEO and President) Sale 94,365 47.81 4,519,287
2007-06-15 Kelly James Patrick (Controller) Sale 150 48.00 7,200
2007-06-15 Paintal Ravijit (Vice President) Sale 14,021 47.95 672,236
2007-06-15 Kaji Gautam S (Director) Sale 5,200 48.01 249,667
2007-06-15 Brady William J (Executive Vice President) Sale 30,000 48.03 1,440,780
2007-06-14 Kelly James Patrick (Controller) Sale 700 48.00 33,600
2007-06-14 Berube Brian A (Vice President,General Counsel) Sale 13,480 47.78 644,020
2007-06-14 Cordeiro Eduardo E (Vice President) Sale 20,000 47.62 952,340
2007-04-30 Oberndorf William E (10% Owner) Buy 34,300 45.62 1,564,834
2007-04-27 Oberndorf William E (10% Owner) Buy 74,700 46.00 3,436,200
2007-01-30 Kelly James Patrick (Controller) Sale 1,000 43.46 43,456
2006-12-06 Cordeiro Eduardo E (Vice President) Sale 3,800 42.01 159,619
2006-12-05 Cordeiro Eduardo E (Vice President) Sale 5,700 42.02 239,542
2006-11-27 Mcarthur John H (Director) Sale 4,800 41.79 200,582
2006-11-10 Brady William J (Executive Vice President) Sale 65,000 42.88 2,786,875
2006-11-10 Brady William J (Executive Vice President) Option Ex 50,000 28.00 1,400,000
2006-11-07 Blevi Dirk (Executive Vice President) Sale 35,000 42.30 1,480,570
2006-11-07 Blevi Dirk (Executive Vice President) Option Ex 40,000 26.40 1,056,000
2006-11-07 Berube Brian A (Vice President,General Counsel) Sale 7,000 42.15 295,050
2006-08-04 Patterson William J (10% Owner) Buy 128,000 31.24 4,001,052
2006-07-24 Patterson William J (10% Owner) Buy 14,900 31.96 476,204
2006-07-21 Patterson William J (10% Owner) Buy 91,000 31.76 2,888,074
2006-07-18 Patterson William J (10% Owner) Buy 124,800 31.94 3,989,351
2006-07-17 Patterson William J (10% Owner) Buy 40,700 31.93 1,299,347
2006-07-14 Patterson William J (10% Owner) Buy 3,000 31.97 95,910
2006-06-29 Patterson William J (10% Owner) Buy 20,300 33.55 681,065
2006-06-28 Blevi Dirk (Executive Vice President) Sale 10,000 33.50 335,000
2006-06-23 Kelly James Patrick (Controller) Sale 1,100 32.70 35,970
2006-06-20 Patterson William J (10% Owner) Buy 34,500 32.00 1,104,000
2006-02-15 William Ernst Oberndorf Trust (10% Owner) Buy 15,000 37.32 559,800
2006-02-10 Oberndorf Family Partners (10% Owner) Buy 39,200 36.79 1,442,168
2006-01-10 Oberndorf William E (10% Owner) Buy 23,650 37.49 886,638
2006-01-09 Oberndorf William E (10% Owner) Buy 100,600 37.41 3,768,910
2006-01-06 Oberndorf William E (10% Owner) Buy 84,100 37.72 3,171,831
2005-12-21 Oberndorf William E (10% Owner) Buy 186,100 35.44 6,594,639
2005-12-16 Gormisky Paul J (Vice President) Sale 4,000 34.82 139,280
2005-11-18 Spo Partners Ii Lp (10% Owner) Buy 104,200 33.95 3,537,590
2005-11-15 Gormisky Paul J (Vice President) Sale 4,000 32.51 130,020
2005-11-11 Spo Partners Ii Lp (10% Owner) Buy 80,600 32.09 2,581,688
2005-11-10 Spo Partners Ii Lp (10% Owner) Buy 50,100 31.39 1,573,197
2005-11-07 Spo Partners Ii Lp (10% Owner) Buy 471,500 31.16 14,652,595
2005-11-04 Spo Partners Ii Lp (10% Owner) Buy 450,000 31.17 13,972,334
2005-10-27 Spo Partners Ii Lp (10% Owner) Buy 34,500 32.45 1,119,456
2005-10-26 Spo Partners Ii Lp (10% Owner) Buy 93,200 32.67 3,044,937
2005-10-21 Oberndorf William E (10% Owner) Buy 42,100 31.65 1,332,633
2005-09-29 Enriquez Cabot Juan (Director) Sale 2,000 31.58 63,160
2005-08-12 Cordeiro Eduardo E (Vice President) Sale 8,735 33.77 294,937
2005-08-03 Mcarthur John H (Director) Sale 3,600 34.05 122,598
2005-08-01 Shaw John A (Executive Vice Presi) Buy 28 34.87 976
2005-06-28 Brady William J (Executive Vice Presi) Sale 29,359 32.00 939,488
2005-06-17 Berube Brian A (Vice President,Gener) Sale 8,288 32.76 271,514
2005-06-07 Macleod Roderick (Director) Buy 4,000 29.28 117,120
2005-06-07 Wrighton Mark S (Director) Buy 2,000 29.43 58,860
2005-05-17 Enriquez Cabot Juan (Director) Sale 2,662 27.81 74,030

Insider trading activities including stock purchases, stock sales, and option exercises of CBT listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Cabot Corp (symbol CBT, CIK number 16040) see the Securities and Exchange Commission (SEC) website.