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 |
|---|---|---|---|---|---|---|
| 2026-03-01 | Cann Cynthia Cammett Chief Accounting Officer | Shares withheld for taxes | −1,385 | $44.63 | $62K | 21,968 |
| 2026-03-01 | FLORANCE ANDREW C President and CEO | Shares withheld for taxes | −59,593 | $44.63 | $2.7M | 1,527,273.03 |
| 2026-02-27 | SIMURO FRANK Chief Technology Officer | Grant or award · Restricted Stock Units | +52,869 | 52,869 | ||
| 2026-02-27 | DESMARAIS MICHAEL J Chief Human Resources Officer | Grant or award · Restricted Stock Units | +17,926 | 17,926 | ||
| 2026-02-27 | Boxer Gene General Counsel and Secretary | Grant or award · Restricted Stock Units | +26,888 | 26,888 | ||
| 2026-02-27 | Ruggles Lisa Senior VP, Global Operations | Grant or award · Restricted Stock Units | +28,197 | 28,197 | ||
| 2026-02-27 | LOWN CHRISTIAN M. Chief Financial Officer | Grant or award · Restricted Stock Units | +39,652 | 39,652 | ||
| 2026-02-27 | SAINT FREDERICK G. President, Marketplaces | Grant or award · Restricted Stock Units | +39,652 | 39,652 | ||
| 2026-02-27 | Cann Cynthia Cammett Chief Accounting Officer | Grant or award · Restricted Stock Units | +6,834 | 6,834 | ||
| 2026-02-27 | FLORANCE ANDREW C President and CEO | Grant or award · Restricted Stock Units | +83,708 | 83,708 | ||
| 2026-02-27 | FLORANCE ANDREW C President and CEO | Purchase | +55,720 | $44.52 | $2.5M | 1,586,866.03 |
| 2026-02-19 | SIMURO FRANK Chief Technology Officer | Returned to the company | −30,727 | 448,721 | ||
| 2026-02-19 | SIMURO FRANK Chief Technology Officer | Shares withheld for taxes | −4,421 | $49.07 | $217K | 444,300 |
| 2026-02-19 | Ruggles Lisa Senior VP, Global Operations | Returned to the company | −17,583 | 190,042 | ||
| 2026-02-19 | Ruggles Lisa Senior VP, Global Operations | Shares withheld for taxes | −3,219 | $49.07 | $158K | 186,823 |
| 2026-02-19 | SAINT FREDERICK G. President, Marketplaces | Returned to the company | −17,583 | 273,096 | ||
| 2026-02-19 | SAINT FREDERICK G. President, Marketplaces | Shares withheld for taxes | −2,149 | $49.07 | $105K | 270,947 |
| 2026-02-19 | FLORANCE ANDREW C President and CEO | Returned to the company | −104,983 | 1,550,367.03 | ||
| 2026-02-19 | FLORANCE ANDREW C President and CEO | Shares withheld for taxes | −19,221 | $49.07 | $943K | 1,531,146.03 |
| 2026-02-15 | SIMURO FRANK Chief Technology Officer | Shares withheld for taxes | −4,151 | $44.99 | $187K | 479,448 |
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