Insider Trading activities of Costar Group Inc insiders.

Monthly summaries of insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Costar Group Inc since 2005 are illustrated in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Costar Group Inc since year 2005. Table 2 shows the detailed insider transactions of Costar Group Inc since 2005. The reporting company's ticker symbol is CSGP. The reporting company's CIK number is 1057352.
The total value of stock buying since 2005 is $0.
The total value of stock sales since 2005 is $190,373,194.
The total value of stock option exercises since 2005 is $33,056,275.


Table 1. Monthly summaries of insider stock purchases, sales, and option exercises for Costar Group Inc (CSGP).
Trading Period Insider Buying Insider Sales Option Exercises
year-month Shares Value Shares Value Shares Value
2017-07 0 $0 1,767 $482,656 1,032 $199,888
2017-06 0 $0 20,000 $5,300,200 0 $0
2017-05 0 $0 51,270 $12,528,677 49,036 $2,046,946
2017-03 0 $0 30,771 $6,316,109 4,500 $168,390
2016-12 0 $0 0 $0 3,173 $230,857
2016-11 0 $0 75 $14,047 0 $0
2016-10 0 $0 1,560 $293,473 0 $0
2016-08 0 $0 5,000 $1,031,650 0 $0
2015-12 0 $0 0 $0 10,086 $492,600
2015-11 0 $0 21,026 $4,300,654 0 $0
2015-06 0 $0 1,225 $250,904 0 $0
2015-03 0 $0 53,731 $10,581,758 9,134 $735,789
2014-08 0 $0 5,431 $803,574 17,000 $762,620
2014-03 0 $0 103,181 $21,593,028 17,067 $989,053
2013-11 0 $0 19,048 $3,424,878 10,000 $374,200
2013-10 0 $0 54,400 $9,741,952 54,400 $1,360,000
2013-09 0 $0 2,750 $442,337 0 $0
2013-08 0 $0 4,211 $650,113 17,000 $511,020
2013-07 0 $0 92,720 $14,534,238 96,720 $4,086,789
2013-06 0 $0 0 $0 10,000 $374,600
2013-03 0 $0 149,522 $15,153,238 104,102 $4,560,401
2012-12 0 $0 17,500 $1,557,500 17,500 $853,772
2012-09 0 $0 135,530 $11,162,311 15,000 $826,050
2012-08 0 $0 56,448 $4,521,484 52,448 $1,444,731
2012-07 0 $0 1,000 $84,980 0 $0
2012-06 0 $0 1,473 $114,466 12,000 $274,440
2012-05 0 $0 102,078 $7,201,076 61,860 $1,969,032
2012-03 0 $0 1,000 $62,690 0 $0
2011-11 0 $0 65,074 $3,932,840 45,074 $915,002
2011-09 0 $0 0 $0 8,000 $143,760
2011-06 0 $0 0 $0 3,000 $53,910
2011-05 0 $0 25,269 $1,726,941 23,769 $886,681
2011-03 0 $0 1,500 $85,875 0 $0
2010-11 0 $0 500,000 $25,000,000 0 $0
2010-10 0 $0 4,417 $222,623 0 $0
2010-09 0 $0 2,951 $133,060 0 $0
2010-08 0 $0 22,463 $998,255 22,463 $405,680
2010-05 0 $0 0 $0 1,000 $24,875
2010-04 0 $0 4,000 $180,038 1,000 $24,875
2009-10 0 $0 46,540 $1,885,081 34,940 $750,056
2009-09 0 $0 570 $22,794 0 $0
2008-05 0 $0 32,947 $1,703,962 25,447 $763,410
2007-10 0 $0 151,213 $8,646,045 128,105 $3,724,652
2007-08 0 $0 11,250 $652,950 11,250 $316,687
2007-07 0 $0 20,000 $1,028,800 20,000 $600,000
2007-02 0 $0 31,667 $1,522,866 31,667 $285,003
2006-12 0 $0 12,500 $625,425 12,500 $239,750
2006-11 0 $0 35,000 $1,769,457 35,000 $824,818
2006-08 0 $0 0 $0 22,523 $474,739
2006-05 0 $0 47,796 $2,688,776 20,000 $361,199
2006-03 0 $0 104,960 $5,399,413 0 $0

Table 2. Detailed insider stock purchases, sales, and option exercises of Costar Group Inc insiders (CSGP)
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
2017-07-31 Linnington Matthew (Executive VP, Sales) Sale 1,767 273.15 482,656
2017-07-31 Linnington Matthew (Executive VP, Sales) Option Ex 1,032 193.69 199,888
2017-06-26 Klein Michael R Sale 20,000 265.01 5,300,200
2017-05-03 Florance Andrew C (President and CEO) Sale 21,768 244.19 5,315,527
2017-05-03 Florance Andrew C (President and CEO) Option Ex 21,768 42.29 920,568
2017-05-02 Hill John W Sale 440 244.52 107,588
2017-05-02 Carchedi Francis (Executive VP, Corp. Dev.) Sale 5,500 245.04 1,347,720
2017-05-02 Carchedi Francis (Executive VP, Corp. Dev.) Option Ex 5,500 37.42 205,810
2017-05-02 Florance Andrew C (President and CEO) Sale 21,768 244.73 5,327,282
2017-05-02 Florance Andrew C (President and CEO) Option Ex 21,768 42.29 920,568
2017-05-01 Wheeler Scott T (Chief Financial Officer) Sale 757 240.00 181,680
2017-05-01 Linnington Matthew (Executive VP, Sales) Sale 1,037 240.00 248,880
2017-03-02 Carchedi Francis (Executive VP, Corp. Dev.) Sale 4,500 204.98 922,410
2017-03-02 Carchedi Francis (Executive VP, Corp. Dev.) Option Ex 4,500 37.42 168,390
2017-03-02 Florance Andrew C (President and CEO) Sale 26,271 205.31 5,393,699
2016-12-29 Florance Andrew C (President and CEO) Option Ex 3,173 72.76 230,857
2016-11-01 Nassetta Christopher J Sale 75 187.30 14,047
2016-10-31 Linnington Matthew (Executive VP, Sales) Sale 1,060 188.31 199,608
2016-10-31 Nassetta Christopher J Sale 500 187.73 93,865
2016-08-01 Glosserman Michael J Sale 5,000 206.33 1,031,650
2015-12-09 Florance Andrew C (President and CEO) Option Ex 10,086 48.84 492,600
2015-11-13 Carchedi Francis (Executive VP, Operations) Sale 3,414 201.65 688,433
2015-11-11 Florance Andrew C (President and CEO) Sale 17,612 205.10 3,612,221
2015-06-15 Steinberg David Jay Sale 1,225 204.82 250,904
2015-03-09 Carchedi Francis (Executive VP, Operations) Sale 5,910 191.05 1,129,105
2015-03-02 Radecki Brian J (Chief Financial Officer) Sale 14,634 197.14 2,884,946
2015-03-02 Radecki Brian J (Chief Financial Officer) Option Ex 9,134 80.56 735,789
2015-03-02 Florance Andrew C (President and CEO) Sale 33,187 197.90 6,567,707
2014-08-26 Nassetta Christopher J (Director) Sale 3,242 148.11 480,172
2014-08-26 Nassetta Christopher J (Director) Option Ex 5,000 44.86 224,300
2014-08-19 Haber Warren H (Director) Sale 2,189 147.74 323,402
2014-08-19 Haber Warren H (Director) Option Ex 7,000 44.86 314,020
2014-08-12 Bonderman David (Director) Option Ex 5,000 44.86 224,300
2014-03-14 Carchedi Francis (Executive VP, Operations) Sale 6,000 207.75 1,246,500
2014-03-11 Stanfill John L (Sr. VP-Sales, Customer Service) Sale 5,789 207.60 1,201,796
2014-03-11 Stanfill John L (Sr. VP-Sales, Customer Service) Option Ex 5,789 58.05 336,080
2014-03-10 Stanfill John L (Sr. VP-Sales, Customer Service) Sale 20,126 208.82 4,202,711
2014-03-10 Stanfill John L (Sr. VP-Sales, Customer Service) Option Ex 1,978 57.16 113,062
2014-03-07 Radecki Brian J (Chief Financial Officer) Sale 21,266 208.78 4,440,021
2014-03-07 Radecki Brian J (Chief Financial Officer) Option Ex 9,300 58.05 539,911
2014-03-06 Florance Andrew C (President and CEO) Sale 50,000 210.04 10,502,000
2013-11-22 Radecki Brian J (Chief Financial Officer) Sale 4,000 181.02 724,080
2013-11-22 Carchedi Francis (Executive VP, Operations) Sale 3,500 181.04 633,640
2013-11-22 Carchedi Francis (Executive VP, Operations) Option Ex 3,500 37.42 130,970
2013-11-21 Radecki Brian J (Chief Financial Officer) Sale 2,500 180.91 452,275
2013-11-21 Carchedi Francis (Executive VP, Operations) Sale 4,000 180.81 723,240
2013-11-21 Carchedi Francis (Executive VP, Operations) Option Ex 4,000 37.42 149,680
2013-11-20 Radecki Brian J (Chief Financial Officer) Sale 2,000 177.23 354,460
2013-11-20 Carchedi Francis (Executive VP, Operations) Sale 2,500 177.23 443,075
2013-11-20 Carchedi Francis (Executive VP, Operations) Option Ex 2,500 37.42 93,550
2013-11-12 Stanfill John L (Sr. VP-Sales, Customer Service) Sale 548 171.73 94,108
2013-10-28 Florance Andrew C (President and CEO) Sale 54,400 179.08 9,741,952
2013-10-28 Florance Andrew C (President and CEO) Option Ex 54,400 25.00 1,360,000
2013-09-09 Kitchen Jennifer (Sr. Vice President, Research) Sale 2,750 160.85 442,337
2013-08-27 Nassetta Christopher J (Director) Sale 1,015 147.89 150,108
2013-08-23 Nassetta Christopher J (Director) Option Ex 3,200 30.06 96,192
2013-08-20 Haber Warren H (Director) Sale 1,396 153.53 214,327
2013-08-20 Haber Warren H (Director) Option Ex 7,000 30.06 210,420
2013-08-20 Bonderman David (Director) Option Ex 5,000 30.06 150,300
2013-08-02 Nassetta Christopher J (Director) Sale 1,800 158.71 285,678
2013-08-02 Nassetta Christopher J (Director) Option Ex 1,800 30.06 54,108
2013-07-30 Radecki Brian J (Chief Financial Officer) Sale 10,267 157.00 1,611,919
2013-07-30 Radecki Brian J (Chief Financial Officer) Option Ex 10,267 50.62 519,715
2013-07-30 Carchedi Francis (Executive VP, Operations) Sale 10,325 157.00 1,621,025
2013-07-30 Carchedi Francis (Executive VP, Operations) Option Ex 10,325 37.42 386,361
2013-07-30 Florance Andrew C (President and CEO) Sale 30,520 157.03 4,792,555
2013-07-30 Florance Andrew C (President and CEO) Option Ex 30,520 43.99 1,342,574
2013-07-29 Florance Andrew C (President and CEO) Sale 41,608 156.43 6,508,739
2013-07-29 Florance Andrew C (President and CEO) Option Ex 45,608 40.30 1,838,139
2013-06-05 Klein Michael R (Director) Option Ex 10,000 37.46 374,600
2013-03-15 Florance Andrew C (President and CEO) Sale 26,253 100.14 2,628,975
2013-03-15 Florance Andrew C (President and CEO) Option Ex 20,000 39.00 780,000
2013-03-14 Florance Andrew C (President and CEO) Sale 30,000 99.68 2,990,400
2013-03-14 Florance Andrew C (President and CEO) Option Ex 30,000 39.00 1,170,000
2013-03-13 Kitchen Jennifer (Sr. Vice President, Research) Sale 16,066 100.01 1,606,760
2013-03-13 Kitchen Jennifer (Sr. Vice President, Research) Option Ex 13,566 52.80 716,284
2013-03-12 Stanfill John L (Sr. VP-Sales, Customer Service) Sale 14,599 101.10 1,475,958
2013-03-12 Stanfill John L (Sr. VP-Sales, Customer Service) Option Ex 10,262 49.48 507,794
2013-03-05 Radecki Brian J (Chief Financial Officer) Sale 20,599 103.50 2,131,996
2013-03-05 Radecki Brian J (Chief Financial Officer) Option Ex 20,599 49.73 1,024,285
2013-03-05 Carchedi Francis (Executive VP, Operations) Sale 9,675 102.74 994,009
2013-03-05 Carchedi Francis (Executive VP, Operations) Option Ex 9,675 37.42 362,038
2013-03-04 Florance Andrew C (President and CEO) Sale 32,330 102.85 3,325,140
2012-12-31 Radecki Brian J (Chief Financial Officer) Sale 17,500 89.00 1,557,500
2012-12-31 Radecki Brian J (Chief Financial Officer) Option Ex 17,500 48.79 853,772
2012-09-20 Klein Michael R (Director) Sale 43,149 81.74 3,526,999
2012-09-19 Klein Michael R (Director) Sale 29,840 83.34 2,486,865
2012-09-18 Klein Michael R (Director) Sale 27,011 82.94 2,240,292
2012-09-13 Kitchen Jennifer (Sr. Vice President, Research) Sale 1,000 82.22 82,220
2012-09-06 Stanfill John L (Sr. VP-Sales, Customer Service) Sale 34,530 81.84 2,825,935
2012-09-06 Stanfill John L (Sr. VP-Sales, Customer Service) Option Ex 15,000 55.07 826,050
2012-08-03 Klein Michael R (Director) Option Ex 6,000 22.87 137,220
2012-08-01 Florance Andrew C (President and CEO) Sale 56,448 80.10 4,521,484
2012-08-01 Florance Andrew C (President and CEO) Option Ex 46,448 28.15 1,307,511
2012-07-30 Marples Paul (Managing Director, CoStar UK) Sale 1,000 84.98 84,980
2012-06-11 Nassetta Christopher J (Director) Sale 1,473 77.71 114,466
2012-06-11 Nassetta Christopher J (Director) Option Ex 5,000 22.87 114,350
2012-06-08 Haber Warren H (Director) Option Ex 7,000 22.87 160,090
2012-05-29 Bonderman David (Director) Option Ex 5,000 22.87 114,350
2012-05-23 Radecki Brian J (Chief Financial Officer) Sale 4,509 71.75 323,520
2012-05-22 Radecki Brian J (Chief Financial Officer) Sale 20,753 71.25 1,478,651
2012-05-22 Radecki Brian J (Chief Financial Officer) Option Ex 19,500 25.00 487,500
2012-05-17 Florance Andrew C (President and CEO) Sale 27,745 70.08 1,944,369
2012-05-11 Marples Paul (Managing Director, CoStar UK) Sale 1,000 70.01 70,010
2012-05-11 Radecki Brian J (Chief Financial Officer) Sale 60 70.50 4,230
2012-05-11 Radecki Brian J (Chief Financial Officer) Option Ex 60 39.81 2,388
2012-05-07 Stanfill John L (Sr. VP-Sales, Customer Service) Sale 11,852 70.13 831,180
2012-05-07 Stanfill John L (Sr. VP-Sales, Customer Service) Option Ex 11,852 36.04 427,146
2012-05-07 Radecki Brian J (Chief Financial Officer) Sale 7,815 70.50 550,957
2012-05-07 Radecki Brian J (Chief Financial Officer) Option Ex 7,815 29.05 226,986
2012-05-04 Stanfill John L (Sr. VP-Sales, Customer Service) Sale 8,000 70.57 564,560
2012-05-04 Radecki Brian J (Chief Financial Officer) Sale 2,711 70.78 191,884
2012-05-04 Kitchen Jennifer (Sr. Vice President, Research) Sale 17,633 70.42 1,241,715
2012-05-04 Kitchen Jennifer (Sr. Vice President, Research) Option Ex 17,633 40.30 710,662
2012-03-09 Marples Paul (Managing Director, CoStar UK) Sale 1,000 62.69 62,690
2011-11-04 Florance Andrew C (President and CEO) Sale 20,000 62.93 1,258,600
2011-11-01 Florance Andrew C (President and CEO) Sale 45,074 59.33 2,674,240
2011-11-01 Florance Andrew C (President and CEO) Option Ex 45,074 20.30 915,002
2011-09-20 Haber Warren H (Director) Option Ex 5,000 17.97 89,850
2011-09-13 Bonderman David (Director) Option Ex 3,000 17.97 53,910
2011-06-21 Klein Michael R (Director) Option Ex 3,000 17.97 53,910
2011-05-03 Marples Paul (Managing Director, FOCUS) Sale 1,500 68.00 102,000
2011-05-02 Stanfill John L (Sr. VP-Sales, Customer Service) Sale 11,002 68.23 750,721
2011-05-02 Stanfill John L (Sr. VP-Sales, Customer Service) Option Ex 11,002 31.53 346,893
2011-05-02 Kitchen Jennifer (Sr. Vice President, Research) Sale 12,767 68.47 874,220
2011-05-02 Kitchen Jennifer (Sr. Vice President, Research) Option Ex 12,767 42.28 539,788
2011-03-04 Marples Paul (Managing Director, FOCUS) Sale 1,500 57.25 85,875
2010-11-11 Klein Michael R (Director) Sale 500,000 50.00 25,000,000
2010-10-26 Marples Paul (Managing Director, FOCUS) Sale 1,250 50.38 62,975
2010-10-25 Stanfill John L (Sr. VP-Sales, Customer Service) Sale 3,167 50.41 159,648
2010-09-14 Kitchen Jennifer (Sr. Vice President, Research) Sale 2,951 45.09 133,060
2010-08-09 Florance Andrew C (President and CEO) Sale 9,883 44.66 441,374
2010-08-09 Florance Andrew C (President and CEO) Option Ex 9,883 18.06 178,486
2010-08-05 Florance Andrew C (President and CEO) Sale 3,855 44.08 169,928
2010-08-05 Florance Andrew C (President and CEO) Option Ex 3,855 18.06 69,621
2010-08-04 Florance Andrew C (President and CEO) Sale 8,725 44.35 386,953
2010-08-04 Florance Andrew C (President and CEO) Option Ex 8,725 18.06 157,573
2010-05-28 Low Josiah O Iii (Director) Option Ex 1,000 24.88 24,875
2010-04-29 Marples Paul (Managing Director, FOCUS) Sale 200 45.00 9,000
2010-04-27 Marples Paul (Managing Director, FOCUS) Sale 3,800 45.01 171,038
2010-04-01 Haber Warren H (Director) Option Ex 1,000 24.88 24,875
2009-10-29 Florance Andrew C (President and CEO) Sale 3,600 39.34 141,624
2009-10-28 Florance Andrew C (President and CEO) Sale 8,000 39.76 318,080
2009-10-27 Florance Andrew C (President and CEO) Sale 34,940 40.80 1,425,377
2009-10-27 Florance Andrew C (President and CEO) Option Ex 34,940 21.47 750,056
2009-09-16 Marples Paul (Managing Director, FOCUS) Sale 570 39.99 22,794
2008-05-07 Florance Andrew C (President and CEO) Sale 25,447 52.21 1,328,587
2008-05-07 Florance Andrew C (President and CEO) Option Ex 25,447 30.00 763,410
2008-05-06 Marples Paul (Managing Director, FOCUS) Sale 7,500 50.05 375,375
2007-10-30 Florance Andrew C (President and CEO) Sale 29,983 56.28 1,687,443
2007-10-29 Florance Andrew C (President and CEO) Sale 121,230 57.40 6,958,602
2007-10-29 Florance Andrew C (President and CEO) Option Ex 128,105 29.07 3,724,652
2007-08-09 Carchedi Francis (Officer) Sale 11,250 58.04 652,950
2007-08-09 Carchedi Francis (Officer) Option Ex 11,250 28.15 316,687
2007-07-30 Carchedi Francis (Officer) Sale 20,000 51.44 1,028,800
2007-07-30 Carchedi Francis (Officer) Option Ex 20,000 30.00 600,000
2007-02-28 Florance Andrew C (President and CEO) Sale 31,667 48.09 1,522,866
2007-02-28 Florance Andrew C (President and CEO) Option Ex 31,667 9.00 285,003
2006-12-04 Farrington Craig (Vice President, Research) Sale 12,500 50.03 625,425
2006-12-04 Farrington Craig (Vice President, Research) Option Ex 12,500 19.18 239,750
2006-11-17 Carchedi Francis (Chief Financial Officer) Sale 14,980 50.35 754,243
2006-11-17 Carchedi Francis (Chief Financial Officer) Option Ex 14,980 24.88 372,627
2006-11-16 Carchedi Francis (Chief Financial Officer) Sale 20,020 50.71 1,015,214
2006-11-16 Carchedi Francis (Chief Financial Officer) Option Ex 20,020 22.59 452,191
2006-08-21 Florance Andrew C (President and CEO) Option Ex 22,523 21.08 474,739
2006-05-04 Carchedi Francis (Chief Financial Officer) Option Ex 5,537 18.06 99,998
2006-05-02 Carchedi Francis (Chief Financial Officer) Sale 14,463 56.06 810,795
2006-05-02 Carchedi Francis (Chief Financial Officer) Option Ex 14,463 18.06 261,201
2006-05-02 Florance Andrew C (President and CEO) Sale 33,333 56.34 1,877,981
2006-03-29 Klein Michael R (Director) Sale 16,500 51.70 853,050
2006-03-28 Klein Michael R (Director) Sale 15,024 51.20 769,228
2006-03-16 Farrington Craig (Vice President, Research) Sale 4,960 50.96 252,761
2006-03-16 Klein Michael R (Director) Sale 8,097 51.00 412,947
2006-03-15 Klein Michael R (Director) Sale 16,967 51.06 866,335
2006-03-14 Klein Michael R (Director) Sale 13,412 51.17 686,292
2006-03-13 Klein Michael R (Director) Sale 30,000 51.96 1,558,800

Insider trading activities including stock purchases, stock sales, and option exercises of CSGP listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Costar Group Inc (symbol CSGP, CIK number 1057352) see the Securities and Exchange Commission (SEC) website.