Andrew C. Florance, President and CEO of CoStar Group, Inc. (CSGP), made one open market purchase of shares worth $2.5 million in the last 365 days, with the most recent on February 27, 2026. This ranks him 267th among 4,983 insiders by purchase amount, above the average of $1.5 million across 3.29 transactions. He reported no open market sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 10, 2026 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | A | Common Stock, par value $0.01 per share | 124162 | $0.00 | 1,651,435.0300 | 424,900,000 | 8.13% | 0.03% |
| Feb. 27, 2026 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | A | Restricted Stock Units | 83708 | $0.00 | 83,708.0000 | 424,900,000 | 9999.99% | 0.02% |
| March 1, 2026 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | F | Common Stock, par value $0.01 per share | 59593 | $44.63 | 1,527,273.0300 | 424,900,000 | 3.76% | 0.01% |
| Feb. 27, 2026 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | P | Common Stock, par value $0.01 per share | 55720 | $44.52 | 1,586,866.0300 | 424,900,000 | 3.64% | 0.01% |
| Feb. 19, 2026 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | F | Common Stock, par value $0.01 per share | 19221 | $49.07 | 1,531,146.0300 | 424,900,000 | 1.24% | 0.00% |
| Feb. 19, 2026 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | D | Common Stock, par value $0.01 per share | 104983 | $0.00 | 1,550,367.0300 | 424,900,000 | 6.34% | 0.02% |
| Feb. 15, 2026 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | F | Common Stock, par value $0.01 per share | 17482 | $44.99 | 1,655,350.0300 | 424,900,000 | 1.05% | 0.00% |
| March 5, 2025 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | A | Common Stock, par value $0.01 per share | 76232 | $0.00 | 1,672,832.0300 | 409,500,000 | 4.77% | 0.02% |
| March 1, 2025 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | F | Common Stock, par value $0.01 per share | 41296 | $76.25 | 1,596,600.0300 | 409,500,000 | 2.52% | 0.01% |
| Feb. 13, 2025 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | D | Common Stock, par value $0.01 per share | 28896 | $0.00 | 1,219,967.0300 | 409,500,000 | 2.31% | 0.01% |
| Feb. 13, 2025 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | F | Common Stock, par value $0.01 per share | 33511 | $73.27 | 1,186,456.0300 | 409,500,000 | 2.75% | 0.01% |
| Feb. 20, 2025 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | A | Common Stock, par value $0.01 per share | 451440 | $0.00 | 1,637,896.0300 | 409,500,000 | 38.05% | 0.11% |
| Feb. 20, 2025 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | A | Option to Acquire Common Stock | 114000 | $0.00 | 114,000.0000 | 409,500,000 | 9999.99% | 0.03% |
| Feb. 15, 2025 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | F | Common Stock, par value $0.01 per share | 14235 | $74.06 | 1,248,863.0300 | 409,500,000 | 1.13% | 0.00% |
| Oct. 25, 2024 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | P | Common Stock, par value $0.01 per share | 14731 | $74.67 | 1,263,098.0300 | 409,500,000 | 1.18% | 0.00% |
| March 1, 2024 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | F | Common Stock, par value $0.01 per share | 24228 | $87.03 | 1,248,367.0000 | 408,100,000 | 1.90% | 0.01% |
| Feb. 22, 2024 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | A | Option to Acquire Common Stock | 90500 | $0.00 | 90,500.0000 | 408,100,000 | 9999.99% | 0.02% |
| Feb. 22, 2024 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | A | Common Stock, par value $0.01 per share | 367840 | $0.00 | 1,272,595.0000 | 408,100,000 | 40.66% | 0.09% |
| Feb. 22, 2024 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | F | Common Stock, par value $0.01 per share | 22058 | $83.98 | 904,755.0000 | 408,100,000 | 2.38% | 0.01% |
| Feb. 22, 2024 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | D | Common Stock, par value $0.01 per share | 31200 | $0.00 | 926,813.0000 | 408,100,000 | 3.26% | 0.01% |
| Feb. 15, 2024 | COSTAR GROUP, INC. | $CSGP | FLORANCE ANDREW C | President and CEO | F | Common Stock, par value $0.01 per share | 16296 | $82.32 | 958,013.0000 | 408,100,000 | 1.67% | 0.00% |