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 |
|---|---|---|---|---|---|---|
| 2026-02-15 | Ruggles Lisa Senior VP, Global Operations | Shares withheld for taxes | −3,576 | $44.99 | $161K | 207,625 |
| 2026-02-15 | SAINT FREDERICK G. President, Marketplaces | Shares withheld for taxes | −2,424 | $44.99 | $109K | 290,679 |
| 2026-02-15 | FLORANCE ANDREW C President and CEO | Shares withheld for taxes | −17,482 | $44.99 | $787K | 1,655,350.03 |
| 2025-11-13 | Hill John W Director | Sale | −2,250 | $68.68 | $155K | 18,231 |
| 2025-11-13 | Cann Cynthia Cammett Chief Accounting Officer | Sale | −1,841 | $68.79 | $127K | 23,211 |
| 2025-09-09 | Sams Louise S Director | Grant or award | +3,291 | 19,409 | ||
| 2025-09-09 | Brunner Angelique G. Director | Grant or award | +3,143 | 10,166 | ||
| 2025-09-09 | Glaser Rachel C Director | Grant or award | +3,143 | 3,143 | ||
| 2025-09-09 | BERISFORD JOHN L Director | Grant or award | +2,973 | 2,973 | ||
| 2025-09-09 | Musslewhite Robert W Director | Grant or award | +3,121 | 18,277 | ||
| 2025-09-09 | Hill John W Director | Grant or award | +3,177 | 20,481 | ||
| 2025-09-09 | McCarthy Christine M Director | Grant or award | +2,973 | 2,973 | ||
| 2025-08-28 | SAINT FREDERICK G. President, Marketplaces | Sale | −25,000 | $90.33 | $2.3M | 293,103 |
| 2025-08-01 | SAINT FREDERICK G. President, Marketplaces | Shares withheld for taxes | −1,436 | $95.19 | $137K | 318,103 |
| 2025-08-01 | Cann Cynthia Cammett Chief Accounting Officer | Shares withheld for taxes | −719 | $95.19 | $68K | 25,052 |
| 2025-07-28 | SAINT FREDERICK G. President, Marketplaces | Sale | −25,000 | $93.23 | $2.3M | 319,539 |
| 2025-07-28 | Cann Cynthia Cammett Chief Accounting Officer | Sale | −2,033 | $92.85 | $189K | 25,771 |
| 2025-07-01 | LOWN CHRISTIAN M. Chief Financial Officer | Shares withheld for taxes | −4,666 | $80.40 | $375K | 130,157 |
| 2025-06-15 | Cann Cynthia Cammett Chief Accounting Officer | Shares withheld for taxes | −461 | $81.16 | $37K | 27,804 |
| 2025-06-11 | SAINT FREDERICK G. President, Marketplaces | Sale | −25,000 | $81.10 | $2.0M | 344,539 |
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