COSTAR GROUP, INC. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| NASSETTA CHRISTOPHER J | — | Award / Grant | 4,055 | — | — | 275,115 | Oct 30, 2023 |
| Sams Louise S | — | Award / Grant | 3,744 | — | — | 12,627 | Oct 30, 2023 |
| KLEIN MICHAEL R | — | Award / Grant | 4,055 | — | — | 2,063,725 | Oct 30, 2023 |
| Musslewhite Robert W | — | Award / Grant | 3,532 | — | — | 11,863 | Oct 30, 2023 |
| DESMARAIS MICHAEL J | Chief Human Resources Officer | Tax Withholding | 1,663 | $76.89 | $127,868 | 44,265 | Oct 1, 2023 |
| Ruggles Lisa | Senior VP, Global Research | Sale | 30,474 | $91.42 | $2,785,933 | 156,208 | Jun 30, 2023 |
| Wheeler Scott T | Chief Financial Officer | Sale | 21,530 | $89.30 | $1,922,629 | 324,714 | Jun 28, 2023 |
| SIMURO FRANK | Chief Technology Officer | Sale | 92,300 | $89.65 | $8,274,695 | 264,483 | Jun 27, 2023 |
| Hill John W | — | Sale | 1,500 | $86.57 | $129,855 | 16,934 | Jun 26, 2023 |
| Wheeler Scott T | Chief Financial Officer | Sale | 24,670 | $80.68 | $1,990,376 | 346,244 | Jun 12, 2023 |
| SAINT FREDERICK G. | President, Marketplaces | Sale | 30,000 | $80.24 | $2,407,200 | 237,887 | Jun 7, 2023 |
| Ruggles Lisa | Senior VP, Global Research | Tax Withholding | 11 | $79.40 | $873 | 186,682 | Jun 1, 2023 |
| KLEIN MICHAEL R | — | Gift | 3,977 | — | — | 2,059,670 | May 23, 2023 |
| Wheeler Scott T | Chief Financial Officer | Gift | 447 | — | — | 1,661 | May 2, 2023 |
| FLORANCE ANDREW C | President and CEO | Option Exercise | 360,530 | $18.28 | $6,590,488 | 1,334,839 | Apr 28, 2023 |
| Hill John W | — | Sale | 2,300 | $68.50 | $157,550 | 18,434 | Mar 31, 2023 |
| SIMURO FRANK | Chief Technology Officer | Option Exercise | 5,470 | $18.28 | $99,992 | 348,983 | Mar 17, 2023 |
| Ruggles Lisa | Senior VP, Global Research | Tax Withholding | 2,485 | $67.62 | $168,036 | 186,693 | Mar 15, 2023 |
| FLORANCE ANDREW C | President and CEO | Tax Withholding | 9,261 | $67.62 | $626,229 | 974,309 | Mar 15, 2023 |
| DESMARAIS MICHAEL J | Chief Human Resources Officer | Tax Withholding | 2,210 | $67.62 | $149,440 | 45,928 | Mar 15, 2023 |
| Wheeler Scott T | Chief Financial Officer | Award / Grant | 26,534 | — | — | 384,230 | Mar 15, 2023 |
| SAINT FREDERICK G. | President, Marketplaces | Tax Withholding | 10,743 | $67.62 | $726,442 | 267,887 | Mar 15, 2023 |
| Boxer Gene | General Counsel and Secretary | Tax Withholding | 371 | $67.62 | $25,087 | 18,035 | Mar 15, 2023 |
| DESMARAIS MICHAEL J | Chief Human Resources Officer | Sale | 5,600 | $70.36 | $394,016 | 44,846 | Mar 8, 2023 |
| Wheeler Scott T | Chief Financial Officer | Tax Withholding | 9,972 | $70.66 | $704,622 | 365,000 | Mar 1, 2023 |
| SAINT FREDERICK G. | President, Marketplaces | Tax Withholding | 6,388 | $70.66 | $451,376 | 283,014 | Mar 1, 2023 |
| Ruggles Lisa | Senior VP, Global Research | Tax Withholding | 6,085 | $70.66 | $429,966 | 193,562 | Mar 1, 2023 |
| FLORANCE ANDREW C | President and CEO | Tax Withholding | 24,224 | $70.66 | $1,711,668 | 964,087 | Mar 1, 2023 |
| DESMARAIS MICHAEL J | Chief Human Resources Officer | Tax Withholding | 593 | $70.66 | $41,901 | 50,446 | Mar 1, 2023 |
| SIMURO FRANK | Chief Technology Officer | Tax Withholding | 6,085 | $70.66 | $429,966 | 337,577 | Mar 1, 2023 |
| Boxer Gene | General Counsel and Secretary | Award / Grant | 14,139 | $70.73 | $1,000,051 | 18,406 | Feb 24, 2023 |
| DESMARAIS MICHAEL J | Chief Human Resources Officer | Award / Grant | 14,139 | $70.73 | $1,000,051 | 51,039 | Feb 24, 2023 |
| SAINT FREDERICK G. | President, Marketplaces | Disposition | 14,279 | — | — | 243,841 | Feb 15, 2023 |
| FLORANCE ANDREW C | President and CEO | Award / Grant | 285,900 | — | — | 1,000,782 | Feb 15, 2023 |
| Ruggles Lisa | Senior VP, Global Research | Disposition | 14,279 | — | — | 154,086 | Feb 14, 2023 |
| Wheeler Scott T | Chief Financial Officer | Award / Grant | 83,600 | — | — | 379,113 | Feb 14, 2023 |
| SIMURO FRANK | Chief Technology Officer | Tax Withholding | 2,261 | $76.78 | $173,600 | 343,662 | Feb 14, 2023 |
| Hill John W | — | Sale | 3,650 | $78.92 | $288,058 | 20,734 | Nov 3, 2022 |
| KLEIN MICHAEL R | — | Gift | 15,000 | — | — | 2,063,647 | Nov 1, 2022 |
| DESMARAIS MICHAEL J | Chief Human Resources Officer | Sale | 1,296 | $82.81 | $107,322 | 36,900 | Oct 28, 2022 |
| Wheeler Scott T | Chief Financial Officer | Gift | 2,610 | — | — | 316,931 | Oct 28, 2022 |
| DESMARAIS MICHAEL J | Chief Human Resources Officer | Tax Withholding | 1,423 | $69.65 | $99,112 | 38,196 | Oct 1, 2022 |
| FLORANCE ANDREW C | President and CEO | Award / Grant | 48 | — | — | 783,419 | Sep 14, 2022 |
| Sams Louise S | — | Award / Grant | 3,583 | — | — | 8,883 | Sep 14, 2022 |
| Glosserman Michael J | — | Award / Grant | 3,745 | — | — | 97,552 | Sep 14, 2022 |
| Hill John W | — | Award / Grant | 3,786 | — | — | 24,384 | Sep 14, 2022 |
| KLEIN MICHAEL R | — | Award / Grant | 3,880 | — | — | 2,078,647 | Sep 14, 2022 |
| Musslewhite Robert W | — | Award / Grant | 3,380 | — | — | 8,331 | Sep 14, 2022 |
| Kaplan Laura Cox | — | Award / Grant | 3,542 | — | — | 10,681 | Sep 14, 2022 |
| NASSETTA CHRISTOPHER J | — | Award / Grant | 3,880 | — | — | 271,060 | Sep 14, 2022 |