Real time insider trading transaction history:
- Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>

Common stock purchase or sale:
Transaction Date |
Reported DateTime |
Company | Symbol | Insider Relationship |
Shares Traded |
Average Price |
Total Amount |
Shares Owned |
Filing |
2024-11-26 Sale |
2024-11-27 6:33 pm |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
5,500 | $79.88 | $439,340 | 58,798 (Direct) |
View |
2024-04-26 Sale |
2024-04-30 4:13 pm |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
3,800 | $92.67 | $352,146 | 64,087 (Direct) |
View |
2023-03-08 Sale |
2023-03-09 4:57 pm |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
5,600 | $70.36 | $394,016 | 44,846 (Direct) |
View |
2022-10-28 Sale |
2022-10-31 4:17 pm |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
1,296 | $82.81 | $107,322 | 36,900 (Direct) |
View |
2022-08-03 Sale |
2022-08-05 4:57 pm |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
2,000 | $72.51 | $145,020 | 39,619 (Direct) |
View |
2022-05-02 Sale |
2022-05-04 4:50 pm |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
1,000 | $63.14 | $63,140 | 41,619 (Direct) |
View |
Stock options: Exercise, Award, Grant, Conversion
Transaction Date |
Reported DateTime |
Exercisable Expiration |
Company | Symnbol | Insider Relationship |
Shares Traded |
Conversion Price |
Shares Owned |
Filing |
2025-03-15 Tax Withholding |
2025-03-18 8:33 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
3,641 | $78.73 | 79,118 (Direct) |
View |
2025-03-05 Option Award |
2025-03-07 6:06 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
9,026 | $0 | 82,759 (Direct) |
View |
2025-03-01 Tax Withholding |
2025-03-03 7:10 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
3,893 | $76.25 | 73,733 (Direct) |
View |
2025-02-27 Option Award |
2025-03-03 7:10 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
18,828 | $0 | 73,733 (Direct) |
View |
2024-03-15 Tax Withholding |
2024-03-19 4:18 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
2,267 | $87.87 | 67,887 (Direct) |
View |
2024-03-01 Tax Withholding |
2024-03-05 4:32 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
1,829 | $87.03 | 70,154 (Direct) |
View |
2024-03-01 Option Award |
2024-03-05 4:32 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
6,924 | $0 | 70,154 (Direct) |
View |
2024-02-22 Option Award |
2024-02-26 8:09 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
16,976 | $0 | 65,059 (Direct) |
View |
2023-10-01 Tax Withholding |
2023-10-02 4:17 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
1,663 | $76.89 | 44,265 (Direct) |
View |
2023-03-15 Tax Withholding |
2023-03-17 5:32 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
2,210 | $67.62 | 45,928 (Direct) |
View |
2023-03-15 Option Award |
2023-03-17 5:32 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
3,292 | $0 | 45,928 (Direct) |
View |
2023-03-01 Tax Withholding |
2023-03-03 5:48 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
593 | $70.66 | 50,446 (Direct) |
View |
2023-02-24 Option Award |
2023-02-27 4:58 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
14,139 | $70.73 | 51,039 (Direct) |
View |
2022-10-01 Tax Withholding |
2022-10-04 5:56 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
1,423 | $69.65 | 38,196 (Direct) |
View |
Ownership |
2022-04-28 4:37 pm |
N/A N/A |
COSTAR GROUP INC. | CSGP | DESMARAIS MICHAEL J Chief Human Resources Officer |
0 | $0 | 42,619 (Direct) |
View |