Insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Costar Group, Inc. (CSGP) since 2015 are shown in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Costar Group, Inc.. Table 2 shows the detailed insider transactions. This company's CIK number is 1057352.
Total stock buying since 2015: $1,099,963.
Total stock sales since 2015: $430,170,656.
Total stock option exercises since 2015: $78,840,514.
| Insider Buying | Insider Sales | Option Exercises | ||||
|---|---|---|---|---|---|---|
| Year | Shares | Value | Shares | Value | Shares | Value |
| 2025 | 0 | $0 | 78,782 | $6,945,008 | 0 | $0 |
| 2024 | 14,731 | $1,099,963 | 233,095 | $20,091,995 | 122,736 | $7,687,569 |
| 2023 | 0 | $0 | 1,331,284 | $103,996,375 | 1,140,400 | $20,676,057 |
| 2022 | 0 | $0 | 182,736 | $12,966,500 | 0 | $0 |
| 2021 | 0 | $0 | 57,432 | $31,483,136 | 13,567 | $4,264,767 |
| 2020 | 0 | $0 | 108,640 | $81,744,286 | 81,001 | $17,776,205 |
| 2019 | 0 | $0 | 114,548 | $61,390,788 | 75,150 | $10,182,361 |
| 2018 | 0 | $0 | 188,665 | $70,452,440 | 135,839 | $14,379,085 |
| 2017 | 0 | $0 | 103,808 | $24,627,642 | 54,568 | $2,415,224 |
| 2016 | 0 | $0 | 6,635 | $1,339,170 | 3,173 | $230,857 |
| 2015 | 0 | $0 | 75,982 | $15,133,316 | 19,220 | $1,228,389 |
| Trading Period | Insider Buying | Insider Sales | Option Exercises | |||
|---|---|---|---|---|---|---|
| year-month | Shares | Value | Shares | Value | Shares | Value |
| 2025-08 | 0 | $0 | 25,000 | $2,258,250 | 0 | $0 |
| 2025-07 | 0 | $0 | 27,033 | $2,519,514 | 0 | $0 |
| 2025-06 | 0 | $0 | 25,000 | $2,027,499 | 0 | $0 |
| 2025-03 | 0 | $0 | 1,749 | $139,745 | 0 | $0 |
| 2024-12 | 0 | $0 | 2,735 | $209,938 | 0 | $0 |
| 2024-11 | 0 | $0 | 8,491 | $675,148 | 0 | $0 |
| 2024-10 | 14,731 | $1,099,963 | 71,633 | $5,350,268 | 0 | $0 |
| 2024-07 | 0 | $0 | 1,200 | $93,840 | 0 | $0 |
| 2024-05 | 0 | $0 | 22,500 | $2,044,075 | 0 | $0 |
| 2024-04 | 0 | $0 | 126,536 | $11,718,726 | 122,736 | $7,687,569 |
| 2023-11 | 0 | $0 | 1,500 | $116,790 | 0 | $0 |
| 2023-06 | 0 | $0 | 200,474 | $17,510,686 | 0 | $0 |
| 2023-04 | 0 | $0 | 1,081,590 | $83,033,664 | 1,081,590 | $19,771,464 |
| 2023-03 | 0 | $0 | 47,720 | $3,335,235 | 58,810 | $904,593 |
| 2022-11 | 0 | $0 | 3,650 | $288,058 | 0 | $0 |
| 2022-10 | 0 | $0 | 1,296 | $107,321 | 0 | $0 |
| 2022-08 | 0 | $0 | 153,400 | $11,112,306 | 0 | $0 |
| 2022-05 | 0 | $0 | 2,750 | $163,012 | 0 | $0 |
| 2022-03 | 0 | $0 | 21,640 | $1,295,803 | 0 | $0 |
| 2021-11 | 0 | $0 | 6,245 | $519,842 | 0 | $0 |
| 2021-10 | 0 | $0 | 9,235 | $803,167 | 0 | $0 |
| 2021-08 | 0 | $0 | 6,160 | $528,312 | 0 | $0 |
| 2021-04 | 0 | $0 | 1,062 | $922,909 | 0 | $0 |
| 2021-03 | 0 | $0 | 34,730 | $28,708,906 | 13,567 | $4,264,767 |
| Trade Date | Insider Name | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2025-08-28 | Saint Frederick G. (President, Marketplaces) | Sale | 25,000 | 90.33 | 2,258,250 |
| 2025-07-28 | Saint Frederick G. (President, Marketplaces) | Sale | 25,000 | 93.23 | 2,330,750 |
| 2025-07-28 | Cann Cynthia Cammett (Chief Accounting Officer) | Sale | 2,033 | 92.85 | 188,764 |
| 2025-06-11 | Saint Frederick G. (President, Marketplaces) | Sale | 25,000 | 81.10 | 2,027,499 |
| 2025-03-10 | Cann Cynthia Cammett (Chief Accounting Officer) | Sale | 1,749 | 79.90 | 139,745 |
| 2024-12-10 | Hill John W (Director) | Sale | 2,735 | 76.76 | 209,938 |
| 2024-11-27 | Nassetta Christopher J (Director) | Sale | 1,681 | 80.39 | 135,135 |
| 2024-11-26 | Desmarais Michael J (Chief Human Resources Officer) | Sale | 5,500 | 79.88 | 439,340 |
| 2024-11-11 | Cann Cynthia Cammett (Chief Accounting Officer) | Sale | 1,310 | 76.85 | 100,673 |
| 2024-10-25 | Klein Michael R (Director) | Sale | 71,633 | 74.69 | 5,350,268 |
| 2024-10-25 | Florance Andrew C (President and CEO) | Buy | 14,731 | 74.67 | 1,099,963 |
| 2024-07-31 | Cann Cynthia Cammett (Chief Accounting Officer) | Sale | 1,200 | 78.20 | 93,840 |
| 2024-05-16 | Saint Frederick G. (President, Marketplaces) | Sale | 2,500 | 88.43 | 221,075 |
| 2024-05-09 | Ruggles Lisa (Senior VP, Global Operations) | Sale | 20,000 | 91.15 | 1,823,000 |
| 2024-04-26 | Desmarais Michael J (Chief Human Resources Officer) | Sale | 3,800 | 92.67 | 352,146 |
| 2024-04-26 | Wheeler Scott T (Chief Financial Officer) | Sale | 122,736 | 92.61 | 11,366,580 |
| 2024-04-26 | Wheeler Scott T (Chief Financial Officer) | Option Ex | 122,736 | 62.63 | 7,687,569 |
| 2023-11-08 | Nassetta Christopher J (Director) | Sale | 1,500 | 77.86 | 116,790 |
| 2023-06-30 | Ruggles Lisa (Senior VP, Global Research) | Sale | 30,474 | 91.42 | 2,785,933 |
| 2023-06-28 | Wheeler Scott T (Chief Financial Officer) | Sale | 21,530 | 89.30 | 1,922,629 |
| 2023-06-27 | Simuro Frank (Chief Technology Officer) | Sale | 92,300 | 89.65 | 8,274,695 |
| 2023-06-26 | Hill John W (Director) | Sale | 1,500 | 86.57 | 129,854 |
| 2023-06-12 | Wheeler Scott T (Chief Financial Officer) | Sale | 24,670 | 80.68 | 1,990,375 |
| 2023-06-07 | Saint Frederick G. (President, Marketplaces) | Sale | 30,000 | 80.24 | 2,407,200 |
| 2023-04-28 | Florance Andrew C (President and CEO) | Sale | 721,060 | 76.77 | 55,355,776 |
| 2023-04-28 | Florance Andrew C (President and CEO) | Option Ex | 721,060 | 18.28 | 13,180,976 |
| 2023-03-31 | Hill John W | Sale | 4,600 | 68.50 | 315,100 |
| 2023-03-17 | Simuro Frank (Chief Technology Officer) | Option Ex | 23,590 | 23.09 | 544,645 |
| 2023-03-08 | Desmarais Michael J (Chief Human Resources Officer) | Sale | 5,600 | 70.36 | 394,016 |
| 2023-03-01 | Simuro Frank (Chief Technology Officer) | Sale | 35,220 | 70.09 | 2,468,569 |
| 2023-03-01 | Simuro Frank (Chief Technology Officer) | Option Ex | 35,220 | 10.22 | 359,948 |
| 2022-11-03 | Hill John W | Sale | 3,650 | 78.92 | 288,058 |
| 2022-10-28 | Desmarais Michael J (Chief Human Resources Officer) | Sale | 1,296 | 82.81 | 107,321 |
| 2022-08-10 | Hill John W | Sale | 1,400 | 74.49 | 104,286 |
| 2022-08-05 | Klein Michael R (Director) | Sale | 150,000 | 72.42 | 10,863,000 |
| 2022-08-03 | Desmarais Michael J (Chief Human Resources Officer) | Sale | 2,000 | 72.51 | 145,020 |
| 2022-05-24 | Hill John W | Sale | 1,750 | 57.07 | 99,872 |
| 2022-05-02 | Desmarais Michael J (Chief Human Resources Officer) | Sale | 1,000 | 63.14 | 63,140 |
| 2022-03-02 | Ruggles Lisa (Senior VP, Global Research) | Sale | 21,640 | 59.88 | 1,295,803 |
| 2021-11-11 | Wheeler Scott T (Chief Financial Officer) | Sale | 85 | 81.72 | 6,946 |
| 2021-11-10 | Nassetta Christopher J | Sale | 2,120 | 83.21 | 176,405 |
| 2021-11-05 | Kaplan Laura Cox | Sale | 4,040 | 83.29 | 336,491 |
| 2021-10-29 | Hill John W | Sale | 9,235 | 86.97 | 803,167 |
| 2021-08-09 | Hill John W | Sale | 6,160 | 85.77 | 528,312 |
| 2021-04-30 | Kaplan Laura Cox | Sale | 1,062 | 869.03 | 922,909 |
| 2021-03-23 | Saint Frederick G. (President, Marketplaces) | Sale | 7,834 | 831.70 | 6,515,537 |
| 2021-03-23 | Saint Frederick G. (President, Marketplaces) | Option Ex | 7,834 | 273.52 | 2,142,755 |
| 2021-03-16 | Wheeler Scott T (Chief Financial Officer) | Sale | 7,326 | 843.28 | 6,177,869 |
| 2021-03-16 | Wheeler Scott T (Chief Financial Officer) | Option Ex | 5,733 | 370.14 | 2,122,012 |
| 2021-03-10 | Florance Andrew C (President and CEO) | Sale | 19,570 | 818.37 | 16,015,500 |
| 2020-09-02 | Ruggles Lisa (Senior VP, Global Research) | Sale | 7,596 | 870.00 | 6,608,520 |
| 2020-09-02 | Ruggles Lisa (Senior VP, Global Research) | Option Ex | 4,333 | 342.13 | 1,482,449 |
| 2020-08-27 | Florance Andrew C (President and CEO) | Sale | 15,584 | 851.66 | 13,272,269 |
| 2020-08-27 | Florance Andrew C (President and CEO) | Option Ex | 15,584 | 193.69 | 3,018,464 |
| 2020-08-26 | Florance Andrew C (President and CEO) | Sale | 15,584 | 848.16 | 13,217,725 |
| 2020-08-26 | Florance Andrew C (President and CEO) | Option Ex | 15,584 | 193.69 | 3,018,464 |
| 2020-08-12 | Linnington Matthew (Executive VP, Sales) | Sale | 2,419 | 826.32 | 1,998,868 |
| 2020-08-04 | Wheeler Scott T (Chief Financial Officer) | Sale | 12,002 | 826.71 | 9,922,173 |
| 2020-08-04 | Wheeler Scott T (Chief Financial Officer) | Option Ex | 8,300 | 273.52 | 2,270,216 |
| 2020-05-07 | Klein Michael R | Sale | 11,361 | 636.51 | 7,231,390 |
| 2020-05-06 | Klein Michael R | Sale | 3,639 | 647.52 | 2,356,325 |
| 2020-03-04 | Steinberg David Jay | Sale | 850 | 714.00 | 606,900 |
| 2020-03-03 | Wheeler Scott T (Chief Financial Officer) | Sale | 6,005 | 703.26 | 4,223,076 |
| 2020-03-02 | Florance Andrew C (President and CEO) | Sale | 33,600 | 663.90 | 22,307,040 |
| 2020-03-02 | Florance Andrew C (President and CEO) | Option Ex | 33,600 | 201.04 | 6,754,944 |
| 2020-02-29 | Wheeler Scott T (Chief Financial Officer) | Option Ex | 3,600 | 342.13 | 1,231,668 |
| 2019-12-31 | Hill John W | Sale | 500 | 591.90 | 295,950 |
| 2019-12-31 | Florance Andrew C (President and CEO) | Option Ex | 1,579 | 188.22 | 297,199 |
| 2019-11-19 | Kaplan Laura Cox | Sale | 576 | 591.60 | 340,761 |
| 2019-10-25 | Nassetta Christopher J | Sale | 406 | 570.99 | 231,821 |
| 2019-07-31 | Linnington Matthew (Executive VP, Sales) | Sale | 14,651 | 617.39 | 9,045,380 |
| 2019-07-31 | Linnington Matthew (Executive VP, Sales) | Option Ex | 13,033 | 243.26 | 3,170,446 |
| 2019-07-26 | Wheeler Scott T (Chief Financial Officer) | Sale | 6,933 | 629.50 | 4,364,323 |
| 2019-07-26 | Wheeler Scott T (Chief Financial Officer) | Option Ex | 4,700 | 204.91 | 963,077 |
| 2019-07-26 | Florance Andrew C (President and CEO) | Sale | 24,210 | 628.64 | 15,219,374 |
| 2019-06-24 | Hill John W | Sale | 315 | 553.23 | 174,267 |
| 2019-03-04 | Florance Andrew C (President and CEO) | Sale | 55,322 | 473.38 | 26,188,328 |
| 2019-03-04 | Florance Andrew C (President and CEO) | Option Ex | 55,322 | 102.16 | 5,651,695 |
| 2019-03-01 | Ruggles Lisa (Senior VP, Global Research) | Sale | 1,538 | 466.62 | 717,661 |
| 2019-03-01 | Wheeler Scott T (Chief Financial Officer) | Sale | 5,396 | 476.11 | 2,569,089 |
| 2019-03-01 | Linnington Matthew (Executive VP, Sales) | Sale | 4,701 | 477.31 | 2,243,834 |
| 2019-03-01 | Linnington Matthew (Executive VP, Sales) | Option Ex | 516 | 193.69 | 99,944 |
| 2018-12-26 | Hill John W | Sale | 1,042 | 330.88 | 344,776 |
| 2018-10-29 | Nassetta Christopher J | Sale | 571 | 349.67 | 199,661 |
| 2018-08-06 | Klein Michael R | Sale | 15,000 | 420.69 | 6,310,350 |
| 2018-07-30 | Linnington Matthew (Executive VP, Sales) | Sale | 4,384 | 411.93 | 1,805,901 |
| 2018-07-30 | Linnington Matthew (Executive VP, Sales) | Option Ex | 4,384 | 188.22 | 825,156 |
| 2018-07-27 | Wheeler Scott T (Chief Financial Officer) | Sale | 4,700 | 426.02 | 2,002,294 |
| 2018-07-27 | Wheeler Scott T (Chief Financial Officer) | Option Ex | 4,700 | 204.91 | 963,077 |
| 2018-07-27 | Carchedi Francis (Executive VP, Corp. Dev.) | Sale | 32,671 | 421.87 | 13,782,914 |
| 2018-07-27 | Carchedi Francis (Executive VP, Corp. Dev.) | Option Ex | 27,832 | 195.22 | 5,433,251 |
| 2018-04-30 | Florance Andrew C (President and CEO) | Sale | 5,839 | 369.05 | 2,154,882 |
| 2018-04-27 | Florance Andrew C (President and CEO) | Sale | 11,200 | 371.15 | 4,156,879 |
| 2018-04-26 | Florance Andrew C (President and CEO) | Sale | 7,782 | 372.34 | 2,897,549 |
| 2018-03-29 | Hill John W | Sale | 1,150 | 361.28 | 415,471 |
| 2018-03-22 | Klein Michael R | Sale | 3,000 | 361.61 | 1,084,830 |
| 2018-03-07 | Carchedi Francis (Executive VP, Corp. Dev.) | Sale | 12,100 | 356.09 | 4,308,689 |
| 2018-03-07 | Carchedi Francis (Executive VP, Corp. Dev.) | Option Ex | 12,100 | 102.16 | 1,236,136 |
| 2018-03-05 | Wheeler Scott T (Chief Financial Officer) | Sale | 1,250 | 353.69 | 442,112 |
| 2018-03-02 | Linnington Matthew (Executive VP, Sales) | Sale | 7,921 | 348.32 | 2,759,042 |
| 2018-03-02 | Linnington Matthew (Executive VP, Sales) | Option Ex | 6,768 | 188.22 | 1,273,872 |
| 2018-02-27 | Florance Andrew C (President and CEO) | Sale | 80,055 | 347.10 | 27,787,090 |
| 2018-02-27 | Florance Andrew C (President and CEO) | Option Ex | 80,055 | 58.05 | 4,647,593 |
| 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 |
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.