CIK 0001057352 · Large accelerated filer
COSTAR GROUP, INC.
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- CSGP
- Exchange
- Nasdaq
- Industry
- Services-Business Services, NEC
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- EIN
- 522091509
- Phone
- 2023466500
- Business address
- 1201 WILSON BLVD., ARLINGTON, VA, 22209
- Former names
- COSTAR GROUP, INC., COSTAR GROUP INC, REALTY INFORMATION GROUP INC
- Open-market buys, last 90 days
- $0
- in 0 filings
- Open-market sales, last 90 days
- $0
- in 0 filings
Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Reading 100 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-03-15 | SIMURO FRANK Chief Technology Officer | Shares withheld for taxes | −11,107 | $43.63 | $485K | 414,491 |
| 2026-03-15 | DESMARAIS MICHAEL J Chief Human Resources Officer | Shares withheld for taxes | −2,873 | $43.63 | $125K | 87,725 |
| 2026-03-15 | Boxer Gene General Counsel and Secretary | Shares withheld for taxes | −482 | $43.63 | $21K | 95,463 |
| 2026-03-15 | Boxer Gene General Counsel and Secretary | Shares withheld for taxes | −428 | $43.63 | $19K | 95,517 |
| 2026-03-15 | Ruggles Lisa Senior VP, Global Operations | Shares withheld for taxes | −2,977 | $43.63 | $130K | 174,915 |
| 2026-03-15 | Cann Cynthia Cammett Chief Accounting Officer | Shares withheld for taxes | −1,194 | $43.63 | $52K | 25,148 |
| 2026-03-10 | DESMARAIS MICHAEL J Chief Human Resources Officer | Grant or award | +17,676 | 90,598 | ||
| 2026-03-10 | Boxer Gene General Counsel and Secretary | Grant or award | +21,920 | 95,945 | ||
| 2026-03-10 | LOWN CHRISTIAN M. Chief Financial Officer | Grant or award | +12,268 | 135,250 | ||
| 2026-03-10 | Cann Cynthia Cammett Chief Accounting Officer | Grant or award | +4,374 | 26,342 | ||
| 2026-03-10 | FLORANCE ANDREW C President and CEO | Grant or award | +124,162 | 1,651,435.03 | ||
| 2026-03-06 | Sams Louise S Director | Purchase | +1,000 | $48.36 | $48K | 20,409 |
| 2026-03-02 | SAINT FREDERICK G. President, Marketplaces | Purchase | +20,000 | $45.33 | $907K | 279,851 |
| 2026-03-02 | Glaser Rachel C Director | Purchase | +1,000 | $44.94 | $45K | 4,157 |
| 2026-03-01 | SIMURO FRANK Chief Technology Officer | Shares withheld for taxes | −18,702 | $44.63 | $835K | 425,598 |
| 2026-03-01 | DESMARAIS MICHAEL J Chief Human Resources Officer | Shares withheld for taxes | −6,353 | $44.63 | $284K | 72,922 |
| 2026-03-01 | Boxer Gene General Counsel and Secretary | Shares withheld for taxes | −4,547 | $44.63 | $203K | 74,025 |
| 2026-03-01 | Ruggles Lisa Senior VP, Global Operations | Shares withheld for taxes | −8,931 | $44.63 | $399K | 177,892 |
| 2026-03-01 | LOWN CHRISTIAN M. Chief Financial Officer | Shares withheld for taxes | −7,175 | $44.63 | $320K | 122,982 |
| 2026-03-01 | SAINT FREDERICK G. President, Marketplaces | Shares withheld for taxes | −11,096 | $44.63 | $495K | 259,851 |
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