CSGP
CoStar Group, Inc.$36.02-0.21 (-0.58%)Prev Close$36.24·MCap$16.49B·P/E2438.93·Vol4.41M·Yield—
▲
Buys (12M)
4
$3.48M
▼
Sells (12M)
19
$10.37M
◆
Net Activity
Net Seller
$6.89M
●
Active Insiders
11
last 12 mo
Over the past 12 months, insider activity at CoStar Group, Inc. (CSGP) has been dominated by selling, with 4 insider purchases totaling $3.48M and 19 insider sales totaling $10.37M. The most recent insider transaction was by Sams Louise S (director), who purchased $48.4K worth of shares on Mar 9, 2026. CoStar Group, Inc. operates in the Real Estate sector, within the Real Estate - Services industry, with a market cap of $16.49B.
CSGP Insider Trading Activity
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Mar 9, 2026 | Sams Louise S | director | Buy | 1,000 | $48.36 | $48.4K | 20,409 |
| Mar 3, 2026 | Glaser Rachel C | director | Buy | 1,000 | $44.94 | $44.9K | 4,157+32% |
| Mar 3, 2026 | SAINT FREDERICK G. | officer: President, Marketplaces | Buy | 20,000 | $45.33 | $906.6K | 279,851 |
| Mar 2, 2026 | FLORANCE ANDREW C | director, officer: President and CEO | Buy | 55,720 | $44.52 | $2.48M | 1,586,866 |
| Feb 19, 2026 | FLORANCE ANDREW C | President and CEO | Sell | 19,221 | $49.07 | $943.2K | 0 |
| Feb 19, 2026 | Ruggles Lisa | Senior VP, Global Operations | Sell | 3,219 | $49.07 | $158.0K | 0 |
| Feb 19, 2026 | SAINT FREDERICK G. | President, Marketplaces | Sell | 2,149 | $49.07 | $105.5K | 0 |
| Feb 19, 2026 | SIMURO FRANK | Chief Technology Officer | Sell | 4,421 | $49.07 | $216.9K | 0 |
| Feb 18, 2026 | SAINT FREDERICK G. | President, Marketplaces | Sell | 2,424 | $44.99 | $109.1K | 0 |
| Feb 15, 2026 | FLORANCE ANDREW C | President and CEO | Sell | 17,482 | $44.99 | $786.5K | 0 |
| Feb 15, 2026 | Ruggles Lisa | Senior VP, Global Operations | Sell | 3,576 | $44.99 | $160.9K | 0 |
| Feb 15, 2026 | SIMURO FRANK | Chief Technology Officer | Sell | 4,151 | $44.99 | $186.8K | 0 |
| Nov 13, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 1,841 | $68.79 | $126.6K | 0 |
| Nov 13, 2025 | Hill John W | Director | Sell | 2,250 | $68.68 | $154.5K | 0 |
| Aug 28, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 25,000 | $90.33 | $2.26M | 0 |
| Aug 1, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 719 | $95.19 | $68.4K | 0 |
| Aug 1, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 1,436 | $95.19 | $136.7K | 0 |
| Jul 28, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 2,033 | $92.85 | $188.8K | 0 |
| Jul 28, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 25,000 | $93.23 | $2.33M | 0 |
| Jul 1, 2025 | LOWN CHRISTIAN M. | Chief Financial Officer | Sell | 4,666 | $80.40 | $375.1K | 0 |
| Jun 15, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 461 | $81.16 | $37.4K | 0 |
| Jun 11, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 25,000 | $81.10 | $2.03M | 0 |
| Jun 1, 2025 | Ruggles Lisa | Senior VP, Global Operations | Sell | 12 | $73.56 | $882.72 | 0 |
| Mar 15, 2025 | Boxer Gene | General Counsel and Secretary | Sell | 481 | $78.73 | $37.9K | 0 |
| Mar 15, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 1,191 | $78.73 | $93.8K | 0 |
| Mar 15, 2025 | DESMARAIS MICHAEL J | Chief Human Resources Officer | Sell | 3,641 | $78.73 | $286.7K | 0 |
| Mar 15, 2025 | Ruggles Lisa | Senior VP, Global Operations | Sell | 1,958 | $78.73 | $154.2K | 0 |
| Mar 15, 2025 | SIMURO FRANK | Chief Technology Officer | Sell | 5,700 | $78.73 | $448.8K | 0 |
| Mar 1, 2025 | FLORANCE ANDREW C | President and CEO | Sell | 41,296 | $76.25 | $3.15M | 0 |
| Mar 1, 2025 | Ruggles Lisa | Senior VP, Global Operations | Sell | 7,410 | $76.25 | $565.0K | 0 |
| Mar 1, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 8,252 | $76.25 | $629.2K | 0 |
| Mar 1, 2025 | SIMURO FRANK | Chief Technology Officer | Sell | 12,432 | $76.25 | $947.9K | 0 |
| Feb 27, 2025 | Boxer Gene | General Counsel and Secretary | Sell | 3,644 | $76.25 | $277.9K | 0 |
| Feb 27, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 813 | $76.25 | $62.0K | 0 |
| Feb 27, 2025 | DESMARAIS MICHAEL J | Chief Human Resources Officer | Sell | 3,893 | $76.25 | $296.8K | 0 |
| Feb 15, 2025 | FLORANCE ANDREW C | President and CEO | Sell | 14,235 | $74.06 | $1.05M | 0 |
| Feb 15, 2025 | Ruggles Lisa | Senior VP, Global Operations | Sell | 3,531 | $74.06 | $261.5K | 0 |
| Feb 15, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 2,349 | $74.06 | $174.0K | 0 |
| Feb 15, 2025 | SIMURO FRANK | Chief Technology Officer | Sell | 5,485 | $74.06 | $406.2K | 0 |
| Feb 13, 2025 | FLORANCE ANDREW C | President and CEO | Sell | 33,511 | $73.27 | $2.46M | 0 |
| Feb 13, 2025 | Ruggles Lisa | Senior VP, Global Operations | Sell | 7,481 | $73.27 | $548.1K | 0 |
| Feb 13, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 6,602 | $73.27 | $483.7K | 0 |
| Feb 13, 2025 | SIMURO FRANK | Chief Technology Officer | Sell | 7,476 | $73.27 | $547.8K | 0 |
| Dec 10, 2024 | Hill John W | Director | Sell | 2,735 | $76.76 | $209.9K | 0 |
| Nov 27, 2024 | NASSETTA CHRISTOPHER J | Director | Sell | 1,681 | $80.39 | $135.1K | 0 |
| Nov 26, 2024 | DESMARAIS MICHAEL J | Chief Human Resources Officer | Sell | 5,500 | $79.88 | $439.3K | 0 |
| Oct 25, 2024 | FLORANCE ANDREW C | President and CEO | Buy | 14,731 | $74.67 | $1.10M | 0 |
| Oct 25, 2024 | KLEIN MICHAEL R | Director | Sell | 71,633 | $74.69 | $5.35M | 0 |
| Jul 31, 2024 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 4,259 | $78.48 | $334.3K | 0 |
| Jul 30, 2024 | Hill John W | Director | Sell | 1,325 | $78.16 | $103.6K | 0 |
Showing 1–50 of 136
1 / 3
CSGP Insider Buying Activity
The following table shows recent insider purchases of CoStar Group, Inc. (CSGP) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Mar 9, 2026 | Sams Louise S | director | Buy | 1,000 | $48.36 | $48.4K | 20,409 |
| Mar 3, 2026 | Glaser Rachel C | director | Buy | 1,000 | $44.94 | $44.9K | 4,157+32% |
| Mar 3, 2026 | SAINT FREDERICK G. | officer: President, Marketplaces | Buy | 20,000 | $45.33 | $906.6K | 279,851 |
| Mar 2, 2026 | FLORANCE ANDREW C | director, officer: President and CEO | Buy | 55,720 | $44.52 | $2.48M | 1,586,866 |
| Oct 25, 2024 | FLORANCE ANDREW C | President and CEO | Buy | 14,731 | $74.67 | $1.10M | 0 |
CSGP Insider Selling Activity
The following table shows recent insider sales of CoStar Group, Inc. (CSGP) stock reported via SEC Form 4 filings.
| Date | Insider | Role | Type | Shares | Avg Price | Value | Shares After |
|---|---|---|---|---|---|---|---|
| Feb 19, 2026 | FLORANCE ANDREW C | President and CEO | Sell | 19,221 | $49.07 | $943.2K | 0 |
| Feb 19, 2026 | Ruggles Lisa | Senior VP, Global Operations | Sell | 3,219 | $49.07 | $158.0K | 0 |
| Feb 19, 2026 | SAINT FREDERICK G. | President, Marketplaces | Sell | 2,149 | $49.07 | $105.5K | 0 |
| Feb 19, 2026 | SIMURO FRANK | Chief Technology Officer | Sell | 4,421 | $49.07 | $216.9K | 0 |
| Feb 18, 2026 | SAINT FREDERICK G. | President, Marketplaces | Sell | 2,424 | $44.99 | $109.1K | 0 |
| Feb 15, 2026 | FLORANCE ANDREW C | President and CEO | Sell | 17,482 | $44.99 | $786.5K | 0 |
| Feb 15, 2026 | Ruggles Lisa | Senior VP, Global Operations | Sell | 3,576 | $44.99 | $160.9K | 0 |
| Feb 15, 2026 | SIMURO FRANK | Chief Technology Officer | Sell | 4,151 | $44.99 | $186.8K | 0 |
| Nov 13, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 1,841 | $68.79 | $126.6K | 0 |
| Nov 13, 2025 | Hill John W | Director | Sell | 2,250 | $68.68 | $154.5K | 0 |
| Aug 28, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 25,000 | $90.33 | $2.26M | 0 |
| Aug 1, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 719 | $95.19 | $68.4K | 0 |
| Aug 1, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 1,436 | $95.19 | $136.7K | 0 |
| Jul 28, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 2,033 | $92.85 | $188.8K | 0 |
| Jul 28, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 25,000 | $93.23 | $2.33M | 0 |
| Jul 1, 2025 | LOWN CHRISTIAN M. | Chief Financial Officer | Sell | 4,666 | $80.40 | $375.1K | 0 |
| Jun 15, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 461 | $81.16 | $37.4K | 0 |
| Jun 11, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 25,000 | $81.10 | $2.03M | 0 |
| Jun 1, 2025 | Ruggles Lisa | Senior VP, Global Operations | Sell | 12 | $73.56 | $882.72 | 0 |
| Mar 15, 2025 | Boxer Gene | General Counsel and Secretary | Sell | 481 | $78.73 | $37.9K | 0 |
| Mar 15, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 1,191 | $78.73 | $93.8K | 0 |
| Mar 15, 2025 | DESMARAIS MICHAEL J | Chief Human Resources Officer | Sell | 3,641 | $78.73 | $286.7K | 0 |
| Mar 15, 2025 | Ruggles Lisa | Senior VP, Global Operations | Sell | 1,958 | $78.73 | $154.2K | 0 |
| Mar 15, 2025 | SIMURO FRANK | Chief Technology Officer | Sell | 5,700 | $78.73 | $448.8K | 0 |
| Mar 1, 2025 | FLORANCE ANDREW C | President and CEO | Sell | 41,296 | $76.25 | $3.15M | 0 |
| Mar 1, 2025 | Ruggles Lisa | Senior VP, Global Operations | Sell | 7,410 | $76.25 | $565.0K | 0 |
| Mar 1, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 8,252 | $76.25 | $629.2K | 0 |
| Mar 1, 2025 | SIMURO FRANK | Chief Technology Officer | Sell | 12,432 | $76.25 | $947.9K | 0 |
| Feb 27, 2025 | Boxer Gene | General Counsel and Secretary | Sell | 3,644 | $76.25 | $277.9K | 0 |
| Feb 27, 2025 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 813 | $76.25 | $62.0K | 0 |
| Feb 27, 2025 | DESMARAIS MICHAEL J | Chief Human Resources Officer | Sell | 3,893 | $76.25 | $296.8K | 0 |
| Feb 15, 2025 | FLORANCE ANDREW C | President and CEO | Sell | 14,235 | $74.06 | $1.05M | 0 |
| Feb 15, 2025 | Ruggles Lisa | Senior VP, Global Operations | Sell | 3,531 | $74.06 | $261.5K | 0 |
| Feb 15, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 2,349 | $74.06 | $174.0K | 0 |
| Feb 15, 2025 | SIMURO FRANK | Chief Technology Officer | Sell | 5,485 | $74.06 | $406.2K | 0 |
| Feb 13, 2025 | FLORANCE ANDREW C | President and CEO | Sell | 33,511 | $73.27 | $2.46M | 0 |
| Feb 13, 2025 | Ruggles Lisa | Senior VP, Global Operations | Sell | 7,481 | $73.27 | $548.1K | 0 |
| Feb 13, 2025 | SAINT FREDERICK G. | President, Marketplaces | Sell | 6,602 | $73.27 | $483.7K | 0 |
| Feb 13, 2025 | SIMURO FRANK | Chief Technology Officer | Sell | 7,476 | $73.27 | $547.8K | 0 |
| Dec 10, 2024 | Hill John W | Director | Sell | 2,735 | $76.76 | $209.9K | 0 |
| Nov 27, 2024 | NASSETTA CHRISTOPHER J | Director | Sell | 1,681 | $80.39 | $135.1K | 0 |
| Nov 26, 2024 | DESMARAIS MICHAEL J | Chief Human Resources Officer | Sell | 5,500 | $79.88 | $439.3K | 0 |
| Oct 25, 2024 | KLEIN MICHAEL R | Director | Sell | 71,633 | $74.69 | $5.35M | 0 |
| Jul 31, 2024 | Cann Cynthia Cammett | Chief Accounting Officer | Sell | 4,259 | $78.48 | $334.3K | 0 |
| Jul 30, 2024 | Hill John W | Director | Sell | 1,325 | $78.16 | $103.6K | 0 |
CSGP Insiders
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