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| Keyboard |
| Costar Group Inc | |
|---|---|
| Ticker | CSGP |
| CIK # | 0001057352 |
| CUSIP | 22160N109 |
| Sector | Trade & Services - Services-Business Services, Nec |
| Address | 1331 L Street NW, Washington, DC 20005 |
| Source | [EDGAR] |
| CIK | Filing | 2011 - 2026 |
|---|---|---|
| [0001057352] | 10-K | |
| [0001057352] | 10-Q | |
| [0001057352] | 3 | |
| [0001057352] | 4 | |
| [0001057352] | 5 | |
| [0001057352] | 8-K | |
| [0001057352] | SC 13G |
| Insider Transaction (Form 3/4/5) | Date | Action | Shares | Price | Value ($) |
|---|---|---|---|---|---|
|
Simuro Frank
Common Stock, par value $0.01 per share
|
2026-03-15 | Tax withheld | 11,107 | $43.63 | 484,598 |
|
Common Stock, par value $0.01 per share
|
2026-03-15 | Tax withheld | 482 | $43.63 | 21,030 |
|
Boxer Gene
Common Stock, par value $0.01 per share
|
2026-03-15 | Tax withheld | 428 | $43.63 | 18,674 |
|
Desmarais Michael J
Common Stock, par value $0.01 per share
|
2026-03-15 | Tax withheld | 2,873 | $43.63 | 125,349 |
|
Ruggles Lisa
Common Stock, par value $0.01 per share
|
2026-03-15 | Tax withheld | 2,977 | $43.63 | 129,887 |
|
Cann Cynthia Cammett
Common Stock, par value $0.01 per share
|
2026-03-15 | Tax withheld | 1,194 | $43.63 | 52,094 |
|
Florance Andrew C
Common Stock, par value $0.01 per share
|
2026-03-10 | Grant | 124,162 | ||
|
Cann Cynthia Cammett
Common Stock, par value $0.01 per share
|
2026-03-10 | Grant | 4,374 | ||
|
LOWN Christian M
Common Stock, par value $0.01 per share
|
2026-03-10 | Grant | 12,268 | ||
|
Desmarais Michael J
Common Stock, par value $0.01 per share
|
2026-03-10 | Grant | 17,676 | ||
|
Boxer Gene
Common Stock, par value $0.01 per share
|
2026-03-10 | Grant | 21,920 | ||
|
Sams Louise S
Common Stock, par value $0.01 per share
|
2026-03-06 | Buy | 1,000 | $48.36 | 48,360 |
|
Glaser Rachel C
Common Stock, par value $0.01 per share
|
2026-03-02 | Buy | 1,000 | $44.94 | 44,940 |
|
Saint Frederick G
Common Stock, par value $0.01 per share
|
2026-03-02 | Buy | 20,000 | $45.33 | 906,600 |
|
Boxer Gene
Common Stock, par value $0.01 per share
|
2026-03-01 | Tax withheld | 4,547 | $44.63 | 202,933 |
|
Florance Andrew C
Common Stock, par value $0.01 per share
|
2026-03-01 | Tax withheld | 59,593 | $44.63 | 2,659,636 |
|
Saint Frederick G
Common Stock, par value $0.01 per share
|
2026-03-01 | Tax withheld | 11,096 | $44.63 | 495,214 |
|
Desmarais Michael J
Common Stock, par value $0.01 per share
|
2026-03-01 | Tax withheld | 6,353 | $44.63 | 283,534 |
|
Simuro Frank
Common Stock, par value $0.01 per share
|
2026-03-01 | Tax withheld | 18,702 | $44.63 | 834,670 |
|
Ruggles Lisa
Common Stock, par value $0.01 per share
|
2026-03-01 | Tax withheld | 8,931 | $44.63 | 398,591 |
| showing 20 of 200 most recent transactions | |||||
| 13F Ownership Over Time | Holders | Shares Held |
|---|---|---|
| 2026-03-31 | 797 | 412,334,310 |
| 2025-12-31 | 859 | 417,543,746 |
| 2025-09-30 | 913 | 407,517,555 |
| 2025-06-30 | 881 | 415,060,337 |
| 2025-03-31 | 865 | 421,154,523 |
| 2024-12-31 | 810 | 398,173,403 |
| 2024-09-30 | 777 | 389,876,118 |
| 2024-06-30 | 767 | 387,042,561 |
| 2024-03-31 | 770 | 405,441,593 |
| 2023-12-31 | 739 | 383,836,404 |
| 2023-09-30 | 691 | 376,193,211 |
| 2023-06-30 | 719 | 385,060,680 |